Merge tag 'mediatek-drm-next-20251120' of https://git.kernel.org/pub/scm/linux/kernel/git/chunkuang.hu/linux into drm-next

Mediatek DRM Next - 20251120

1. Fix probe resource leaks
2. Add support for MT8195/88 HDMIv2 and DDCv2
3. Fix CCORR mtk_ctm_s31_32_to_s1_n function issue
4. Fix device node reference leak in mtk_dp_dt_parse()

Signed-off-by: Dave Airlie <[e-mail]>

From: Chun-Kuang Hu <[e-mail]>
Link: https://patch.msgid.link/[e-mail]

drivers/gpu/drm/mediatek/Kconfig

···
 	help
 	  DRM/KMS Display Port driver for MediaTek SoCs.
 
+config DRM_MEDIATEK_HDMI_COMMON
+	tristate
+	depends on DRM_MEDIATEK
+	select DRM_DISPLAY_HDMI_HELPER
+	select DRM_DISPLAY_HELPER
+	select SND_SOC_HDMI_CODEC if SND_SOC
+	help
+	  MediaTek SoC HDMI common library
+
 config DRM_MEDIATEK_HDMI
 	tristate "DRM HDMI Support for Mediatek SoCs"
 	depends on DRM_MEDIATEK
-	select SND_SOC_HDMI_CODEC if SND_SOC
+	select DRM_MEDIATEK_HDMI_COMMON
 	help
 	  DRM/KMS HDMI driver for Mediatek SoCs
+
+config DRM_MEDIATEK_HDMI_V2
+	tristate "DRM HDMI v2 IP support for MediaTek SoCs"
+	depends on DRM_MEDIATEK
+	select DRM_MEDIATEK_HDMI_COMMON
+	help
+	  Say yes here to enable support for the HDMIv2 IP and related
+	  DDCv2 as found in the MediaTek MT8195, MT8188 SoCs and other
+	  variants.
+	  This driver can also be built as a module. If so, the HDMIv2
+	  module will be called "mtk_hdmi_v2", and the DDCv2 module
+	  will be called "mtk_hdmi_ddc_v2".

drivers/gpu/drm/mediatek/Makefile

···
 
 obj-$(CONFIG_DRM_MEDIATEK) += mediatek-drm.o
 
+obj-$(CONFIG_DRM_MEDIATEK_HDMI_COMMON) += mtk_hdmi_common.o
 obj-$(CONFIG_DRM_MEDIATEK_HDMI) += mtk_cec.o
 obj-$(CONFIG_DRM_MEDIATEK_HDMI) += mtk_hdmi.o
 obj-$(CONFIG_DRM_MEDIATEK_HDMI) += mtk_hdmi_ddc.o
+obj-$(CONFIG_DRM_MEDIATEK_HDMI_V2) += mtk_hdmi_v2.o
+obj-$(CONFIG_DRM_MEDIATEK_HDMI_V2) += mtk_hdmi_ddc_v2.o
 
 obj-$(CONFIG_DRM_MEDIATEK_DP) += mtk_dp.o

drivers/gpu/drm/mediatek/mtk_ddp_comp.c

···
 	return ret;
 }
 
-int mtk_ddp_comp_init(struct device_node *node, struct mtk_ddp_comp *comp,
+static void mtk_ddp_comp_put_device(void *_dev)
+{
+	struct device *dev = _dev;
+
+	put_device(dev);
+}
+
+static void mtk_ddp_comp_clk_put(void *_clk)
+{
+	struct clk *clk = _clk;
+
+	clk_put(clk);
+}
+
+int mtk_ddp_comp_init(struct device *dev, struct device_node *node, struct mtk_ddp_comp *comp,
 		      unsigned int comp_id)
 {
 	struct platform_device *comp_pdev;
 	enum mtk_ddp_comp_type type;
 	struct mtk_ddp_comp_dev *priv;
-#if IS_REACHABLE(CONFIG_MTK_CMDQ)
 	int ret;
-#endif
 
 	if (comp_id >= DDP_COMPONENT_DRM_ID_MAX)
 		return -EINVAL;
···
 	}
 	comp->dev = &comp_pdev->dev;
 
+	ret = devm_add_action_or_reset(dev, mtk_ddp_comp_put_device, comp->dev);
+	if (ret)
+		return ret;
+
 	if (type == MTK_DISP_AAL ||
 	    type == MTK_DISP_BLS ||
 	    type == MTK_DISP_CCORR ||
···
 	    type == MTK_DSI)
 		return 0;
 
-	priv = devm_kzalloc(comp->dev, sizeof(*priv), GFP_KERNEL);
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 
-	priv->regs = of_iomap(node, 0);
+	priv->regs = devm_of_iomap(dev, node, 0, NULL);
+	if (IS_ERR(priv->regs))
+		return PTR_ERR(priv->regs);
+
 	priv->clk = of_clk_get(node, 0);
 	if (IS_ERR(priv->clk))
 		return PTR_ERR(priv->clk);
+
+	ret = devm_add_action_or_reset(dev, mtk_ddp_comp_clk_put, priv->clk);
+	if (ret)
+		return ret;
 
 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 	ret = cmdq_dev_get_client_reg(comp->dev, &priv->cmdq_reg, 0);

drivers/gpu/drm/mediatek/mtk_ddp_comp.h

···
 int mtk_ddp_comp_get_id(struct device_node *node,
 			enum mtk_ddp_comp_type comp_type);
 int mtk_find_possible_crtcs(struct drm_device *drm, struct device *dev);
-int mtk_ddp_comp_init(struct device_node *comp_node, struct mtk_ddp_comp *comp,
+int mtk_ddp_comp_init(struct device *dev, struct device_node *comp_node, struct mtk_ddp_comp *comp,
 		      unsigned int comp_id);
 enum mtk_ddp_comp_type mtk_ddp_comp_get_type(unsigned int comp_id);
 void mtk_ddp_write(struct cmdq_pkt *cmdq_pkt, unsigned int value,

drivers/gpu/drm/mediatek/mtk_disp_ccorr.c

···
 	writel_relaxed(0x0, ccorr->regs + DISP_CCORR_EN);
 }
 
-/* Converts a DRM S31.32 value to the HW S1.n format. */
-static u16 mtk_ctm_s31_32_to_s1_n(u64 in, u32 n)
-{
-	u16 r;
-
-	/* Sign bit. */
-	r = in & BIT_ULL(63) ? BIT(n + 1) : 0;
-
-	if ((in & GENMASK_ULL(62, 33)) > 0) {
-		/* identity value 0x100000000 -> 0x400(mt8183), */
-		/* identity value 0x100000000 -> 0x800(mt8192), */
-		/* if bigger this, set it to max 0x7ff. */
-		r |= GENMASK(n, 0);
-	} else {
-		/* take the n+1 most important bits. */
-		r |= (in >> (32 - n)) & GENMASK(n, 0);
-	}
-
-	return r;
-}
-
 void mtk_ccorr_ctm_set(struct device *dev, struct drm_crtc_state *state)
 {
 	struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev);
···
 	input = ctm->matrix;
 
 	for (i = 0; i < ARRAY_SIZE(coeffs); i++)
-		coeffs[i] = mtk_ctm_s31_32_to_s1_n(input[i], matrix_bits);
+		coeffs[i] = drm_color_ctm_s31_32_to_qm_n(input[i], 2, matrix_bits);
 
 	mtk_ddp_write(cmdq_pkt, coeffs[0] << 16 | coeffs[1],
 		      &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_0);

drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c

···
 	       type == OVL_ADAPTOR_TYPE_PADDING;
 }
 
+static void ovl_adaptor_put_device(void *_dev)
+{
+	struct device *dev = _dev;
+
+	put_device(dev);
+}
+
 static int ovl_adaptor_comp_init(struct device *dev, struct component_match **match)
 {
 	struct mtk_disp_ovl_adaptor *priv = dev_get_drvdata(dev);
···
 		comp_pdev = of_find_device_by_node(node);
 		if (!comp_pdev)
 			return -EPROBE_DEFER;
+
+		ret = devm_add_action_or_reset(dev, ovl_adaptor_put_device,
+					       &comp_pdev->dev);
+		if (ret)
+			return ret;
 
 		priv->ovl_adaptor_comp[id] = &comp_pdev->dev;
 

drivers/gpu/drm/mediatek/mtk_dp.c

···
 	endpoint = of_graph_get_endpoint_by_regs(pdev->dev.of_node, 1, -1);
 	len = of_property_count_elems_of_size(endpoint,
 					      "data-lanes", sizeof(u32));
+	of_node_put(endpoint);
 	if (len < 0 || len > 4 || len == 3) {
 		dev_err(dev, "invalid data lane size: %d\n", len);
 		return -EINVAL;

drivers/gpu/drm/mediatek/mtk_drm_drv.c

···
 							    (void *)private->mmsys_dev,
 							    sizeof(*private->mmsys_dev));
 		private->ddp_comp[DDP_COMPONENT_DRM_OVL_ADAPTOR].dev = &ovl_adaptor->dev;
-		mtk_ddp_comp_init(NULL, &private->ddp_comp[DDP_COMPONENT_DRM_OVL_ADAPTOR],
+		mtk_ddp_comp_init(dev, NULL, &private->ddp_comp[DDP_COMPONENT_DRM_OVL_ADAPTOR],
 				  DDP_COMPONENT_DRM_OVL_ADAPTOR);
 		component_match_add(dev, &match, compare_dev, &ovl_adaptor->dev);
 	}
···
 						   node);
 		}
 
-		ret = mtk_ddp_comp_init(node, &private->ddp_comp[comp_id], comp_id);
+		ret = mtk_ddp_comp_init(dev, node, &private->ddp_comp[comp_id], comp_id);
 		if (ret) {
 			of_node_put(node);
 			goto err_node;

drivers/gpu/drm/mediatek/mtk_hdmi.c

···
 #include <drm/drm_probe_helper.h>
 
 #include "mtk_cec.h"
+#include "mtk_hdmi_common.h"
 #include "mtk_hdmi_regs.h"
 
 #define NCTS_BYTES	7
···
 	MTK_HDMI_CLK_AUD_SPDIF,
 	MTK_HDMI_CLK_COUNT
 };
-
-enum hdmi_aud_input_type {
-	HDMI_AUD_INPUT_I2S = 0,
-	HDMI_AUD_INPUT_SPDIF,
-};
-
-enum hdmi_aud_i2s_fmt {
-	HDMI_I2S_MODE_RJT_24BIT = 0,
-	HDMI_I2S_MODE_RJT_16BIT,
-	HDMI_I2S_MODE_LJT_24BIT,
-	HDMI_I2S_MODE_LJT_16BIT,
-	HDMI_I2S_MODE_I2S_24BIT,
-	HDMI_I2S_MODE_I2S_16BIT
-};
-
-enum hdmi_aud_mclk {
-	HDMI_AUD_MCLK_128FS,
-	HDMI_AUD_MCLK_192FS,
-	HDMI_AUD_MCLK_256FS,
-	HDMI_AUD_MCLK_384FS,
-	HDMI_AUD_MCLK_512FS,
-	HDMI_AUD_MCLK_768FS,
-	HDMI_AUD_MCLK_1152FS,
-};
-
-enum hdmi_aud_channel_type {
-	HDMI_AUD_CHAN_TYPE_1_0 = 0,
-	HDMI_AUD_CHAN_TYPE_1_1,
-	HDMI_AUD_CHAN_TYPE_2_0,
-	HDMI_AUD_CHAN_TYPE_2_1,
-	HDMI_AUD_CHAN_TYPE_3_0,
-	HDMI_AUD_CHAN_TYPE_3_1,
-	HDMI_AUD_CHAN_TYPE_4_0,
-	HDMI_AUD_CHAN_TYPE_4_1,
-	HDMI_AUD_CHAN_TYPE_5_0,
-	HDMI_AUD_CHAN_TYPE_5_1,
-	HDMI_AUD_CHAN_TYPE_6_0,
-	HDMI_AUD_CHAN_TYPE_6_1,
-	HDMI_AUD_CHAN_TYPE_7_0,
-	HDMI_AUD_CHAN_TYPE_7_1,
-	HDMI_AUD_CHAN_TYPE_3_0_LRS,
-	HDMI_AUD_CHAN_TYPE_3_1_LRS,
-	HDMI_AUD_CHAN_TYPE_4_0_CLRS,
-	HDMI_AUD_CHAN_TYPE_4_1_CLRS,
-	HDMI_AUD_CHAN_TYPE_6_1_CS,
-	HDMI_AUD_CHAN_TYPE_6_1_CH,
-	HDMI_AUD_CHAN_TYPE_6_1_OH,
-	HDMI_AUD_CHAN_TYPE_6_1_CHR,
-	HDMI_AUD_CHAN_TYPE_7_1_LH_RH,
-	HDMI_AUD_CHAN_TYPE_7_1_LSR_RSR,
-	HDMI_AUD_CHAN_TYPE_7_1_LC_RC,
-	HDMI_AUD_CHAN_TYPE_7_1_LW_RW,
-	HDMI_AUD_CHAN_TYPE_7_1_LSD_RSD,
-	HDMI_AUD_CHAN_TYPE_7_1_LSS_RSS,
-	HDMI_AUD_CHAN_TYPE_7_1_LHS_RHS,
-	HDMI_AUD_CHAN_TYPE_7_1_CS_CH,
-	HDMI_AUD_CHAN_TYPE_7_1_CS_OH,
-	HDMI_AUD_CHAN_TYPE_7_1_CS_CHR,
-	HDMI_AUD_CHAN_TYPE_7_1_CH_OH,
-	HDMI_AUD_CHAN_TYPE_7_1_CH_CHR,
-	HDMI_AUD_CHAN_TYPE_7_1_OH_CHR,
-	HDMI_AUD_CHAN_TYPE_7_1_LSS_RSS_LSR_RSR,
-	HDMI_AUD_CHAN_TYPE_6_0_CS,
-	HDMI_AUD_CHAN_TYPE_6_0_CH,
-	HDMI_AUD_CHAN_TYPE_6_0_OH,
-	HDMI_AUD_CHAN_TYPE_6_0_CHR,
-	HDMI_AUD_CHAN_TYPE_7_0_LH_RH,
-	HDMI_AUD_CHAN_TYPE_7_0_LSR_RSR,
-	HDMI_AUD_CHAN_TYPE_7_0_LC_RC,
-	HDMI_AUD_CHAN_TYPE_7_0_LW_RW,
-	HDMI_AUD_CHAN_TYPE_7_0_LSD_RSD,
-	HDMI_AUD_CHAN_TYPE_7_0_LSS_RSS,
-	HDMI_AUD_CHAN_TYPE_7_0_LHS_RHS,
-	HDMI_AUD_CHAN_TYPE_7_0_CS_CH,
-	HDMI_AUD_CHAN_TYPE_7_0_CS_OH,
-	HDMI_AUD_CHAN_TYPE_7_0_CS_CHR,
-	HDMI_AUD_CHAN_TYPE_7_0_CH_OH,
-	HDMI_AUD_CHAN_TYPE_7_0_CH_CHR,
-	HDMI_AUD_CHAN_TYPE_7_0_OH_CHR,
-	HDMI_AUD_CHAN_TYPE_7_0_LSS_RSS_LSR_RSR,
-	HDMI_AUD_CHAN_TYPE_8_0_LH_RH_CS,
-	HDMI_AUD_CHAN_TYPE_UNKNOWN = 0xFF
-};
-
-enum hdmi_aud_channel_swap_type {
-	HDMI_AUD_SWAP_LR,
-	HDMI_AUD_SWAP_LFE_CC,
-	HDMI_AUD_SWAP_LSRS,
-	HDMI_AUD_SWAP_RLS_RRS,
-	HDMI_AUD_SWAP_LR_STATUS,
-};
-
-struct hdmi_audio_param {
-	enum hdmi_audio_coding_type aud_codec;
-	enum hdmi_audio_sample_size aud_sample_size;
-	enum hdmi_aud_input_type aud_input_type;
-	enum hdmi_aud_i2s_fmt aud_i2s_fmt;
-	enum hdmi_aud_mclk aud_mclk;
-	enum hdmi_aud_channel_type aud_input_chan_type;
-	struct hdmi_codec_params codec_params;
-};
-
-struct mtk_hdmi_conf {
-	bool tz_disabled;
-	bool cea_modes_only;
-	unsigned long max_mode_clock;
-};
-
-struct mtk_hdmi {
-	struct drm_bridge bridge;
-	struct drm_bridge *next_bridge;
-	struct drm_connector *curr_conn;/* current connector (only valid when 'enabled') */
-	struct device *dev;
-	const struct mtk_hdmi_conf *conf;
-	struct phy *phy;
-	struct device *cec_dev;
-	struct i2c_adapter *ddc_adpt;
-	struct clk *clk[MTK_HDMI_CLK_COUNT];
-	struct drm_display_mode mode;
-	bool dvi_mode;
-	struct regmap *sys_regmap;
-	unsigned int sys_offset;
-	struct regmap *regs;
-	struct platform_device *audio_pdev;
-	struct hdmi_audio_param aud_param;
-	bool audio_enable;
-	bool powered;
-	bool enabled;
-	hdmi_codec_plugged_cb plugged_cb;
-	struct device *codec_dev;
-	struct mutex update_plugged_status_lock;
-};
-
-static inline struct mtk_hdmi *hdmi_ctx_from_bridge(struct drm_bridge *b)
-{
-	return container_of(b, struct mtk_hdmi, bridge);
-}
 
 static void mtk_hdmi_hw_vid_black(struct mtk_hdmi *hdmi, bool black)
 {
···
 	regmap_write(hdmi->regs, GRL_CFG5, val);
 }
 
-struct hdmi_acr_n {
-	unsigned int clock;
-	unsigned int n[3];
-};
-
-/* Recommended N values from HDMI specification, tables 7-1 to 7-3 */
-static const struct hdmi_acr_n hdmi_rec_n_table[] = {
-	/* Clock, N: 32kHz 44.1kHz 48kHz */
-	{  25175, {  4576,  7007,  6864 } },
-	{  74176, { 11648, 17836, 11648 } },
-	{ 148352, { 11648,  8918,  5824 } },
-	{ 296703, {  5824,  4459,  5824 } },
-	{ 297000, {  3072,  4704,  5120 } },
-	{      0, {  4096,  6272,  6144 } }, /* all other TMDS clocks */
-};
-
-/**
- * hdmi_recommended_n() - Return N value recommended by HDMI specification
- * @freq: audio sample rate in Hz
- * @clock: rounded TMDS clock in kHz
- */
-static unsigned int hdmi_recommended_n(unsigned int freq, unsigned int clock)
-{
-	const struct hdmi_acr_n *recommended;
-	unsigned int i;
-
-	for (i = 0; i < ARRAY_SIZE(hdmi_rec_n_table) - 1; i++) {
-		if (clock == hdmi_rec_n_table[i].clock)
-			break;
-	}
-	recommended = hdmi_rec_n_table + i;
-
-	switch (freq) {
-	case 32000:
-		return recommended->n[0];
-	case 44100:
-		return recommended->n[1];
-	case 48000:
-		return recommended->n[2];
-	case 88200:
-		return recommended->n[1] * 2;
-	case 96000:
-		return recommended->n[2] * 2;
-	case 176400:
-		return recommended->n[1] * 4;
-	case 192000:
-		return recommended->n[2] * 4;
-	default:
-		return (128 * freq) / 1000;
-	}
-}
-
-static unsigned int hdmi_mode_clock_to_hz(unsigned int clock)
-{
-	switch (clock) {
-	case 25175:
-		return 25174825;	/* 25.2/1.001 MHz */
-	case 74176:
-		return 74175824;	/* 74.25/1.001 MHz */
-	case 148352:
-		return 148351648;	/* 148.5/1.001 MHz */
-	case 296703:
-		return 296703297;	/* 297/1.001 MHz */
-	default:
-		return clock * 1000;
-	}
-}
-
-static unsigned int hdmi_expected_cts(unsigned int audio_sample_rate,
-				      unsigned int tmds_clock, unsigned int n)
-{
-	return DIV_ROUND_CLOSEST_ULL((u64)hdmi_mode_clock_to_hz(tmds_clock) * n,
-				     128 * audio_sample_rate);
-}
-
-static void mtk_hdmi_get_ncts(unsigned int sample_rate, unsigned int clock,
-			      unsigned int *n, unsigned int *cts)
-{
-	*n = hdmi_recommended_n(sample_rate, clock);
-	*cts = hdmi_expected_cts(sample_rate, clock, *n);
-}
-
 static void do_hdmi_hw_aud_set_ncts(struct mtk_hdmi *hdmi, unsigned int n,
 				    unsigned int cts)
 {
···
 	[MTK_HDMI_CLK_AUD_SPDIF] = "spdif",
 };
 
-static int mtk_hdmi_get_all_clk(struct mtk_hdmi *hdmi,
-				struct device_node *np)
-{
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(mtk_hdmi_clk_names); i++) {
-		hdmi->clk[i] = of_clk_get_by_name(np,
-						  mtk_hdmi_clk_names[i]);
-		if (IS_ERR(hdmi->clk[i]))
-			return PTR_ERR(hdmi->clk[i]);
-	}
-	return 0;
-}
-
 static int mtk_hdmi_clk_enable_audio(struct mtk_hdmi *hdmi)
 {
 	int ret;
···
 	return 0;
 }
 
-static bool mtk_hdmi_bridge_mode_fixup(struct drm_bridge *bridge,
-				       const struct drm_display_mode *mode,
-				       struct drm_display_mode *adjusted_mode)
-{
-	return true;
-}
-
 static void mtk_hdmi_bridge_atomic_disable(struct drm_bridge *bridge,
 					   struct drm_atomic_state *state)
 {
···
 	mtk_hdmi_hw_make_reg_writable(hdmi, false);
 
 	hdmi->powered = false;
-}
-
-static void mtk_hdmi_bridge_mode_set(struct drm_bridge *bridge,
-				const struct drm_display_mode *mode,
-				const struct drm_display_mode *adjusted_mode)
-{
-	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
-
-	dev_dbg(hdmi->dev, "cur info: name:%s, hdisplay:%d\n",
-		adjusted_mode->name, adjusted_mode->hdisplay);
-	dev_dbg(hdmi->dev, "hsync_start:%d,hsync_end:%d, htotal:%d",
-		adjusted_mode->hsync_start, adjusted_mode->hsync_end,
-		adjusted_mode->htotal);
-	dev_dbg(hdmi->dev, "hskew:%d, vdisplay:%d\n",
-		adjusted_mode->hskew, adjusted_mode->vdisplay);
-	dev_dbg(hdmi->dev, "vsync_start:%d, vsync_end:%d, vtotal:%d",
-		adjusted_mode->vsync_start, adjusted_mode->vsync_end,
-		adjusted_mode->vtotal);
-	dev_dbg(hdmi->dev, "vscan:%d, flag:%d\n",
-		adjusted_mode->vscan, adjusted_mode->flags);
-
-	drm_mode_copy(&hdmi->mode, adjusted_mode);
 }
 
 static void mtk_hdmi_bridge_atomic_pre_enable(struct drm_bridge *bridge,
···
 	.edid_read = mtk_hdmi_bridge_edid_read,
 };
 
-static int mtk_hdmi_get_cec_dev(struct mtk_hdmi *hdmi, struct device *dev, struct device_node *np)
-{
-	struct platform_device *cec_pdev;
-	struct device_node *cec_np;
-	int ret;
-
-	ret = mtk_hdmi_get_all_clk(hdmi, np);
-	if (ret)
-		return dev_err_probe(dev, ret, "Failed to get clocks\n");
-
-	/* The CEC module handles HDMI hotplug detection */
-	cec_np = of_get_compatible_child(np->parent, "mediatek,mt8173-cec");
-	if (!cec_np)
-		return dev_err_probe(dev, -EINVAL, "Failed to find CEC node\n");
-
-	cec_pdev = of_find_device_by_node(cec_np);
-	if (!cec_pdev) {
-		dev_err(hdmi->dev, "Waiting for CEC device %pOF\n",
-			cec_np);
-		of_node_put(cec_np);
-		return -EPROBE_DEFER;
-	}
-	of_node_put(cec_np);
-
-	/*
-	 * The mediatek,syscon-hdmi property contains a phandle link to the
-	 * MMSYS_CONFIG device and the register offset of the HDMI_SYS_CFG
-	 * registers it contains.
-	 */
-	hdmi->sys_regmap = syscon_regmap_lookup_by_phandle_args(np, "mediatek,syscon-hdmi",
-								1, &hdmi->sys_offset);
-	if (IS_ERR(hdmi->sys_regmap))
-		return dev_err_probe(dev, PTR_ERR(hdmi->sys_regmap),
-				     "Failed to get system configuration registers\n");
-
-	hdmi->cec_dev = &cec_pdev->dev;
-	return 0;
-}
-
-static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
-				   struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
-	struct device_node *remote, *i2c_np;
-	int ret;
-
-	ret = mtk_hdmi_get_all_clk(hdmi, np);
-	if (ret)
-		return dev_err_probe(dev, ret, "Failed to get clocks\n");
-
-	hdmi->regs = device_node_to_regmap(dev->of_node);
-	if (IS_ERR(hdmi->regs))
-		return PTR_ERR(hdmi->regs);
-
-	remote = of_graph_get_remote_node(np, 1, 0);
-	if (!remote)
-		return -EINVAL;
-
-	if (!of_device_is_compatible(remote, "hdmi-connector")) {
-		hdmi->next_bridge = of_drm_find_bridge(remote);
-		if (!hdmi->next_bridge) {
-			dev_err(dev, "Waiting for external bridge\n");
-			of_node_put(remote);
-			return -EPROBE_DEFER;
-		}
-	}
-
-	i2c_np = of_parse_phandle(remote, "ddc-i2c-bus", 0);
-	of_node_put(remote);
-	if (!i2c_np)
-		return dev_err_probe(dev, -EINVAL, "No ddc-i2c-bus in connector\n");
-
-	hdmi->ddc_adpt = of_find_i2c_adapter_by_node(i2c_np);
-	of_node_put(i2c_np);
-	if (!hdmi->ddc_adpt)
-		return dev_err_probe(dev, -EINVAL, "Failed to get ddc i2c adapter by node\n");
-
-	ret = mtk_hdmi_get_cec_dev(hdmi, dev, np);
-	if (ret)
-		return ret;
-
-	return 0;
-}
-
 /*
  * HDMI audio codec callbacks
  */
-
-static int mtk_hdmi_audio_params(struct mtk_hdmi *hdmi,
-				 struct hdmi_codec_daifmt *daifmt,
-				 struct hdmi_codec_params *params)
-{
-	struct hdmi_audio_param aud_params = { 0 };
-	unsigned int chan = params->cea.channels;
-
-	dev_dbg(hdmi->dev, "%s: %u Hz, %d bit, %d channels\n", __func__,
-		params->sample_rate, params->sample_width, chan);
-
-	if (!hdmi->bridge.encoder)
-		return -ENODEV;
-
-	switch (chan) {
-	case 2:
-		aud_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_2_0;
-		break;
-	case 4:
-		aud_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_4_0;
-		break;
-	case 6:
-		aud_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_5_1;
-		break;
-	case 8:
-		aud_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_7_1;
-		break;
-	default:
-		dev_err(hdmi->dev, "channel[%d] not supported!\n", chan);
-		return -EINVAL;
-	}
-
-	switch (params->sample_rate) {
-	case 32000:
-	case 44100:
-	case 48000:
-	case 88200:
-	case 96000:
-	case 176400:
-	case 192000:
-		break;
-	default:
-		dev_err(hdmi->dev, "rate[%d] not supported!\n",
-			params->sample_rate);
-		return -EINVAL;
-	}
-
-	switch (daifmt->fmt) {
-	case HDMI_I2S:
-		aud_params.aud_codec = HDMI_AUDIO_CODING_TYPE_PCM;
-		aud_params.aud_sample_size = HDMI_AUDIO_SAMPLE_SIZE_16;
-		aud_params.aud_input_type = HDMI_AUD_INPUT_I2S;
-		aud_params.aud_i2s_fmt = HDMI_I2S_MODE_I2S_24BIT;
-		aud_params.aud_mclk = HDMI_AUD_MCLK_128FS;
-		break;
-	case HDMI_SPDIF:
-		aud_params.aud_codec = HDMI_AUDIO_CODING_TYPE_PCM;
-		aud_params.aud_sample_size = HDMI_AUDIO_SAMPLE_SIZE_16;
-		aud_params.aud_input_type = HDMI_AUD_INPUT_SPDIF;
-		break;
-	default:
-		dev_err(hdmi->dev, "%s: Invalid DAI format %d\n", __func__,
-			daifmt->fmt);
-		return -EINVAL;
-	}
-	memcpy(&aud_params.codec_params, params, sizeof(aud_params.codec_params));
-	memcpy(&hdmi->aud_param, &aud_params, sizeof(aud_params));
-
-	dev_dbg(hdmi->dev, "codec:%d, input:%d, channel:%d, fs:%d\n",
-		aud_params.aud_codec, aud_params.aud_input_type,
-		aud_params.aud_input_chan_type, aud_params.codec_params.sample_rate);
-
-	return 0;
-}
 
 static int mtk_hdmi_audio_hw_params(struct device *dev, void *data,
 				    struct hdmi_codec_daifmt *daifmt,
···
 	return 0;
 }
 
-static int mtk_hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size_t len)
-{
-	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
-
-	if (hdmi->enabled)
-		memcpy(buf, hdmi->curr_conn->eld, min(sizeof(hdmi->curr_conn->eld), len));
-	else
-		memset(buf, 0, len);
-	return 0;
-}
-
-static void mtk_hdmi_audio_set_plugged_cb(struct mtk_hdmi *hdmi, hdmi_codec_plugged_cb fn,
-					  struct device *codec_dev)
-{
-	mutex_lock(&hdmi->update_plugged_status_lock);
-	hdmi->plugged_cb = fn;
-	hdmi->codec_dev = codec_dev;
-	mutex_unlock(&hdmi->update_plugged_status_lock);
-}
-
 static int mtk_hdmi_audio_hook_plugged_cb(struct device *dev, void *data,
 					  hdmi_codec_plugged_cb fn,
 					  struct device *codec_dev)
···
 	.hook_plugged_cb = mtk_hdmi_audio_hook_plugged_cb,
 };
 
-static void mtk_hdmi_unregister_audio_driver(void *data)
-{
-	platform_device_unregister(data);
-}
-
-static int mtk_hdmi_register_audio_driver(struct device *dev)
-{
-	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
-	struct hdmi_audio_param *aud_param = &hdmi->aud_param;
-	struct hdmi_codec_pdata codec_data = {
-		.ops = &mtk_hdmi_audio_codec_ops,
-		.max_i2s_channels = 2,
-		.i2s = 1,
-		.data = hdmi,
-		.no_capture_mute = 1,
-	};
-	int ret;
-
-	aud_param->aud_codec = HDMI_AUDIO_CODING_TYPE_PCM;
-	aud_param->aud_sample_size = HDMI_AUDIO_SAMPLE_SIZE_16;
-	aud_param->aud_input_type = HDMI_AUD_INPUT_I2S;
-	aud_param->aud_i2s_fmt = HDMI_I2S_MODE_I2S_24BIT;
-	aud_param->aud_mclk = HDMI_AUD_MCLK_128FS;
-	aud_param->aud_input_chan_type = HDMI_AUD_CHAN_TYPE_2_0;
-
-	hdmi->audio_pdev = platform_device_register_data(dev,
-							 HDMI_CODEC_DRV_NAME,
-							 PLATFORM_DEVID_AUTO,
-							 &codec_data,
-							 sizeof(codec_data));
-	if (IS_ERR(hdmi->audio_pdev))
-		return PTR_ERR(hdmi->audio_pdev);
-
-	ret = devm_add_action_or_reset(dev, mtk_hdmi_unregister_audio_driver,
-				       hdmi->audio_pdev);
-	if (ret)
-		return ret;
-
-	return 0;
-}
-
 static int mtk_hdmi_probe(struct platform_device *pdev)
 {
 	struct mtk_hdmi *hdmi;
-	struct device *dev = &pdev->dev;
 	int ret;
 
-	hdmi = devm_drm_bridge_alloc(dev, struct mtk_hdmi, bridge,
-				     &mtk_hdmi_bridge_funcs);
+	hdmi = mtk_hdmi_common_probe(pdev);
 	if (IS_ERR(hdmi))
 		return PTR_ERR(hdmi);
 
-	hdmi->dev = dev;
-	hdmi->conf = of_device_get_match_data(dev);
-
-	ret = mtk_hdmi_dt_parse_pdata(hdmi, pdev);
-	if (ret)
-		return ret;
-
-	hdmi->phy = devm_phy_get(dev, "hdmi");
-	if (IS_ERR(hdmi->phy))
-		return dev_err_probe(dev, PTR_ERR(hdmi->phy),
-				     "Failed to get HDMI PHY\n");
-
-	mutex_init(&hdmi->update_plugged_status_lock);
-	platform_set_drvdata(pdev, hdmi);
-
-	ret = mtk_hdmi_register_audio_driver(dev);
-	if (ret)
-		return dev_err_probe(dev, ret,
-				     "Failed to register audio driver\n");
-
-	hdmi->bridge.of_node = pdev->dev.of_node;
-	hdmi->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID
-			 | DRM_BRIDGE_OP_HPD;
-	hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
-	hdmi->bridge.vendor = "MediaTek";
-	hdmi->bridge.product = "On-Chip HDMI";
-
-	ret = devm_drm_bridge_add(dev, &hdmi->bridge);
-	if (ret)
-		return dev_err_probe(dev, ret, "Failed to add bridge\n");
+	if (!hdmi->cec_dev)
+		return dev_err_probe(hdmi->dev, -ENODEV, "CEC is required by HDMIv1\n");
 
 	ret = mtk_hdmi_clk_enable_audio(hdmi);
 	if (ret)
-		return dev_err_probe(dev, ret,
+		return dev_err_probe(hdmi->dev, ret,
 				     "Failed to enable audio clocks\n");
 
 	return 0;
···
 
 static SIMPLE_DEV_PM_OPS(mtk_hdmi_pm_ops, mtk_hdmi_suspend, mtk_hdmi_resume);
 
+static const struct mtk_hdmi_ver_conf mtk_hdmi_v1_ver_conf = {
+	.bridge_funcs = &mtk_hdmi_bridge_funcs,
+	.codec_ops = &mtk_hdmi_audio_codec_ops,
+	.mtk_hdmi_clock_names = mtk_hdmi_clk_names,
+	.num_clocks = ARRAY_SIZE(mtk_hdmi_clk_names)
+};
+
 static const struct mtk_hdmi_conf mtk_hdmi_conf_mt2701 = {
 	.tz_disabled = true,
+	.ver_conf = &mtk_hdmi_v1_ver_conf
 };
 
 static const struct mtk_hdmi_conf mtk_hdmi_conf_mt8167 = {
-	.max_mode_clock = 148500,
 	.cea_modes_only = true,
+	.max_mode_clock = 148500,
+	.ver_conf = &mtk_hdmi_v1_ver_conf
+};
+
+static const struct mtk_hdmi_conf mtk_hdmi_conf_mt8173 = {
+	.ver_conf = &mtk_hdmi_v1_ver_conf
 };
 
 static const struct of_device_id mtk_hdmi_of_ids[] = {
 	{ .compatible = "mediatek,mt2701-hdmi", .data = &mtk_hdmi_conf_mt2701 },
 	{ .compatible = "mediatek,mt8167-hdmi", .data = &mtk_hdmi_conf_mt8167 },
-	{ .compatible = "mediatek,mt8173-hdmi" },
+	{ .compatible = "mediatek,mt8173-hdmi", .data = &mtk_hdmi_conf_mt8173 },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, mtk_hdmi_of_ids);
···
 MODULE_DESCRIPTION("MediaTek HDMI Driver");
 MODULE_LICENSE("GPL v2");
 MODULE_IMPORT_NS("DRM_MTK_HDMI_V1");
+MODULE_IMPORT_NS("DRM_MTK_HDMI");

drivers/gpu/drm/mediatek/mtk_hdmi_common.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2014 MediaTek Inc.
+ * Copyright (c) 2024 Collabora Ltd.
+ *                    AngeloGioacchino Del Regno <[e-mail]>
+ */
+
+#include <drm/drm_modes.h>
+#include <linux/device.h>
+#include <linux/hdmi.h>
+#include <linux/i2c.h>
+#include <linux/math.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/syscon.h>
+#include <sound/hdmi-codec.h>
+
+#include "mtk_hdmi_common.h"
+
+struct hdmi_acr_n {
+	unsigned int clock;
+	unsigned int n[3];
+};
+
+/* Recommended N values from HDMI specification, tables 7-1 to 7-3 */
+static const struct hdmi_acr_n hdmi_rec_n_table[] = {
+	/* Clock, N: 32kHz 44.1kHz 48kHz */
+	{  25175, {  4576,  7007,  6864 } },
+	{  74176, { 11648, 17836, 11648 } },
+	{ 148352, { 11648,  8918,  5824 } },
+	{ 296703, {  5824,  4459,  5824 } },
+	{ 297000, {  3072,  4704,  5120 } },
+	{      0, {  4096,  6272,  6144 } }, /* all other TMDS clocks */
+};
+
+/**
+ * hdmi_recommended_n() - Return N value recommended by HDMI specification
+ * @freq: audio sample rate in Hz
+ * @clock: rounded TMDS clock in kHz
+ */
+static unsigned int hdmi_recommended_n(unsigned int freq, unsigned int clock)
+{
+	const struct hdmi_acr_n *recommended;
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(hdmi_rec_n_table) - 1; i++) {
+		if (clock == hdmi_rec_n_table[i].clock)
+			break;
+	}
+	recommended = hdmi_rec_n_table + i;
+
+	switch (freq) {
+	case 32000:
+		return recommended->n[0];
+	case 44100:
+		return recommended->n[1];
+	case 48000:
+		return recommended->n[2];
+	case 88200:
+		return recommended->n[1] * 2;
+	case 96000:
+		return recommended->n[2] * 2;
+	case 176400:
+		return recommended->n[1] * 4;
+	case 192000:
+		return recommended->n[2] * 4;
+	default:
+		return (128 * freq) / 1000;
+	}
+}
+
+static unsigned int hdmi_mode_clock_to_hz(unsigned int clock)
+{
+	switch (clock) {
+	case 25175:
+		return 25174825;	/* 25.2/1.001 MHz */
+	case 74176:
+		return 74175824;	/* 74.25/1.001 MHz */
+	case 148352:
+		return 148351648;	/* 148.5/1.001 MHz */
+	case 296703:
+		return 296703297;	/* 297/1.001 MHz */
+	default:
+		return clock * 1000;
+	}
+}
+
+static unsigned int hdmi_expected_cts(unsigned int audio_sample_rate,
+				      unsigned int tmds_clock, unsigned int n)
+{
+	return DIV_ROUND_CLOSEST_ULL((u64)hdmi_mode_clock_to_hz(tmds_clock) * n,
+				     128 * audio_sample_rate);
+}
+
+void mtk_hdmi_get_ncts(unsigned int sample_rate, unsigned int clock,
+		       unsigned int *n, unsigned int *cts)
+{
+	*n = hdmi_recommended_n(sample_rate, clock);
+	*cts = hdmi_expected_cts(sample_rate, clock, *n);
+}
+EXPORT_SYMBOL_NS_GPL(mtk_hdmi_get_ncts, "DRM_MTK_HDMI");
+
+int mtk_hdmi_audio_params(struct mtk_hdmi *hdmi,
+			  struct hdmi_codec_daifmt *daifmt,
+			  struct hdmi_codec_params *params)
+{
+	struct hdmi_audio_param aud_params = { 0 };
+	unsigned int chan = params->cea.channels;
+
+	dev_dbg(hdmi->dev, "%s: %u Hz, %d bit, %d channels\n", __func__,
+		params->sample_rate, params->sample_width, chan);
+
+	if (!hdmi->bridge.encoder)
+		return -ENODEV;
+
+	switch (chan) {
+	case 2:
+		aud_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_2_0;
+		break;
+	case 4:
+		aud_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_4_0;
+		break;
+	case 6:
+		aud_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_5_1;
+		break;
+	case 8:
+		aud_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_7_1;
+		break;
+	default:
+		dev_err(hdmi->dev, "channel[%d] not supported!\n", chan);
+		return -EINVAL;
+	}
+
+	switch (params->sample_rate) {
+	case 32000:
+	case 44100:
+	case 48000:
+	case 88200:
+	case 96000:
+	case 176400:
+	case 192000:
+		break;
+	default:
+		dev_err(hdmi->dev, "rate[%d] not supported!\n",
+			params->sample_rate);
+		return -EINVAL;
+	}
+
+	switch (daifmt->fmt) {
+	case HDMI_I2S:
+		aud_params.aud_codec = HDMI_AUDIO_CODING_TYPE_PCM;
+		aud_params.aud_sample_size = HDMI_AUDIO_SAMPLE_SIZE_16;
+		aud_params.aud_input_type = HDMI_AUD_INPUT_I2S;
+		aud_params.aud_i2s_fmt = HDMI_I2S_MODE_I2S_24BIT;
+		aud_params.aud_mclk = HDMI_AUD_MCLK_128FS;
+		break;
+	case HDMI_SPDIF:
+		aud_params.aud_codec = HDMI_AUDIO_CODING_TYPE_PCM;
+		aud_params.aud_sample_size = HDMI_AUDIO_SAMPLE_SIZE_16;
+		aud_params.aud_input_type = HDMI_AUD_INPUT_SPDIF;
+		break;
+	default:
+		dev_err(hdmi->dev, "%s: Invalid DAI format %d\n", __func__,
+			daifmt->fmt);
+		return -EINVAL;
+	}
+	memcpy(&aud_params.codec_params, params, sizeof(aud_params.codec_params));
+	memcpy(&hdmi->aud_param, &aud_params, sizeof(aud_params));
+
+	dev_dbg(hdmi->dev, "codec:%d, input:%d, channel:%d, fs:%d\n",
+		aud_params.aud_codec, aud_params.aud_input_type,
+		aud_params.aud_input_chan_type, aud_params.codec_params.sample_rate);
+
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(mtk_hdmi_audio_params, "DRM_MTK_HDMI");
+
+int mtk_hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size_t len)
+{
+	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
+
+	if (hdmi->enabled)
+		memcpy(buf, hdmi->curr_conn->eld, min(sizeof(hdmi->curr_conn->eld), len));
+	else
+		memset(buf, 0, len);
+
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(mtk_hdmi_audio_get_eld, "DRM_MTK_HDMI");
+
+void mtk_hdmi_audio_set_plugged_cb(struct mtk_hdmi *hdmi, hdmi_codec_plugged_cb fn,
+				   struct device *codec_dev)
+{
+	mutex_lock(&hdmi->update_plugged_status_lock);
+	hdmi->plugged_cb = fn;
+	hdmi->codec_dev = codec_dev;
+	mutex_unlock(&hdmi->update_plugged_status_lock);
+}
+EXPORT_SYMBOL_NS_GPL(mtk_hdmi_audio_set_plugged_cb, "DRM_MTK_HDMI");
+
+static int mtk_hdmi_get_all_clk(struct mtk_hdmi *hdmi, struct device_node *np,
+				const char * const *clock_names, size_t num_clocks)
+{
+	int i;
+
+	for (i = 0; i < num_clocks; i++) {
+		hdmi->clk[i] = of_clk_get_by_name(np, clock_names[i]);
+
+		if (IS_ERR(hdmi->clk[i]))
+			return PTR_ERR(hdmi->clk[i]);
+	}
+
+	return 0;
+}
+
+bool mtk_hdmi_bridge_mode_fixup(struct drm_bridge *bridge,
+				const struct drm_display_mode *mode,
+				struct drm_display_mode *adjusted_mode)
+{
+	return true;
+}
+EXPORT_SYMBOL_NS_GPL(mtk_hdmi_bridge_mode_fixup, "DRM_MTK_HDMI");
+
+void mtk_hdmi_bridge_mode_set(struct drm_bridge *bridge,
+			      const struct drm_display_mode *mode,
+			      const struct drm_display_mode *adjusted_mode)
+{
+	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
+
+	dev_dbg(hdmi->dev, "cur info: name:%s, hdisplay:%d\n",
+		adjusted_mode->name, adjusted_mode->hdisplay);
+	dev_dbg(hdmi->dev, "hsync_start:%d,hsync_end:%d, htotal:%d",
+		adjusted_mode->hsync_start, adjusted_mode->hsync_end,
+		adjusted_mode->htotal);
+	dev_dbg(hdmi->dev, "hskew:%d, vdisplay:%d\n",
+		adjusted_mode->hskew, adjusted_mode->vdisplay);
+	dev_dbg(hdmi->dev, "vsync_start:%d, vsync_end:%d, vtotal:%d",
+		adjusted_mode->vsync_start, adjusted_mode->vsync_end,
+		adjusted_mode->vtotal);
+	dev_dbg(hdmi->dev, "vscan:%d, flag:%d\n",
+		adjusted_mode->vscan, adjusted_mode->flags);
+
+	drm_mode_copy(&hdmi->mode, adjusted_mode);
+}
+EXPORT_SYMBOL_NS_GPL(mtk_hdmi_bridge_mode_set, "DRM_MTK_HDMI");
+
+static void mtk_hdmi_put_device(void *_dev)
+{
+	struct device *dev = _dev;
+
+	put_device(dev);
+}
+
+static int mtk_hdmi_get_cec_dev(struct mtk_hdmi *hdmi, struct device *dev, struct device_node *np)
+{
+	struct platform_device *cec_pdev;
+	struct device_node *cec_np;
+	int ret;
+
+	/* The CEC module handles HDMI hotplug detection */
+	cec_np = of_get_compatible_child(np->parent, "mediatek,mt8173-cec");
+	if (!cec_np)
+		return dev_err_probe(dev, -EOPNOTSUPP, "Failed to find CEC node\n");
+
+	cec_pdev = of_find_device_by_node(cec_np);
+	if (!cec_pdev) {
+		dev_err(hdmi->dev, "Waiting for CEC device %pOF\n", cec_np);
+		of_node_put(cec_np);
+		return -EPROBE_DEFER;
+	}
+	of_node_put(cec_np);
+
+	ret = devm_add_action_or_reset(dev, mtk_hdmi_put_device, &cec_pdev->dev);
+	if (ret)
+		return ret;
+
+	/*
+	 * The mediatek,syscon-hdmi property contains a phandle link to the
+	 * MMSYS_CONFIG device and the register offset of the HDMI_SYS_CFG
+	 * registers it contains.
+	 */
+	hdmi->sys_regmap = syscon_regmap_lookup_by_phandle_args(np, "mediatek,syscon-hdmi",
+								1, &hdmi->sys_offset);
+	if (IS_ERR(hdmi->sys_regmap))
+		return dev_err_probe(dev, PTR_ERR(hdmi->sys_regmap),
+				     "Failed to get system configuration registers\n");
+
+	hdmi->cec_dev = &cec_pdev->dev;
+	return 0;
+}
+
+static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi, struct platform_device *pdev,
+				   const char * const *clk_names, size_t num_clocks)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct device_node *remote, *i2c_np;
+	int ret;
+
+	ret = mtk_hdmi_get_all_clk(hdmi, np, clk_names, num_clocks);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to get clocks\n");
+
+	hdmi->irq = platform_get_irq(pdev, 0);
+	if (!hdmi->irq)
+		return hdmi->irq;
+
+	hdmi->regs = device_node_to_regmap(dev->of_node);
+	if (IS_ERR(hdmi->regs))
+		return PTR_ERR(hdmi->regs);
+
+	remote = of_graph_get_remote_node(np, 1, 0);
+	if (!remote)
+		return -EINVAL;
+
+	if (!of_device_is_compatible(remote, "hdmi-connector")) {
+		hdmi->next_bridge = of_drm_find_bridge(remote);
+		if (!hdmi->next_bridge) {
+			dev_err(dev, "Waiting for external bridge\n");
+			of_node_put(remote);
+			return -EPROBE_DEFER;
+		}
+	}
+
+	i2c_np = of_parse_phandle(remote, "ddc-i2c-bus", 0);
+	of_node_put(remote);
+	if (!i2c_np)
+		return dev_err_probe(dev, -EINVAL, "No ddc-i2c-bus in connector\n");
+
+	hdmi->ddc_adpt = of_find_i2c_adapter_by_node(i2c_np);
+	of_node_put(i2c_np);
+	if (!hdmi->ddc_adpt)
+		return dev_err_probe(dev, -EPROBE_DEFER, "Failed to get ddc i2c adapter by node\n");
+
+	ret = devm_add_action_or_reset(dev, mtk_hdmi_put_device, &hdmi->ddc_adpt->dev);
+	if (ret)
+		return ret;
+
+	ret = mtk_hdmi_get_cec_dev(hdmi, dev, np);
+	if (ret == -EOPNOTSUPP)
+		dev_info(dev, "CEC support unavailable: node not found\n");
+	else if (ret)
+		return ret;
+
+	return 0;
+}
+
+static void mtk_hdmi_unregister_audio_driver(void *data)
+{
+	platform_device_unregister(data);
+}
+
+static int mtk_hdmi_register_audio_driver(struct device *dev)
+{
+	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
+	struct hdmi_audio_param *aud_param = &hdmi->aud_param;
+	struct hdmi_codec_pdata codec_data = {
+		.ops = hdmi->conf->ver_conf->codec_ops,
+		.max_i2s_channels = 2,
+		.i2s = 1,
+		.data = hdmi,
+		.no_capture_mute = 1,
+	};
+	int ret;
+
+	aud_param->aud_codec = HDMI_AUDIO_CODING_TYPE_PCM;
+	aud_param->aud_sample_size = HDMI_AUDIO_SAMPLE_SIZE_16;
+	aud_param->aud_input_type = HDMI_AUD_INPUT_I2S;
+	aud_param->aud_i2s_fmt = HDMI_I2S_MODE_I2S_24BIT;
+	aud_param->aud_mclk = HDMI_AUD_MCLK_128FS;
+	aud_param->aud_input_chan_type = HDMI_AUD_CHAN_TYPE_2_0;
+
+	hdmi->audio_pdev = platform_device_register_data(dev,
+							 HDMI_CODEC_DRV_NAME,
+							 PLATFORM_DEVID_AUTO,
+							 &codec_data,
+							 sizeof(codec_data));
+	if (IS_ERR(hdmi->audio_pdev))
+		return PTR_ERR(hdmi->audio_pdev);
+
+	ret = devm_add_action_or_reset(dev, mtk_hdmi_unregister_audio_driver,
+				       hdmi->audio_pdev);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+struct mtk_hdmi *mtk_hdmi_common_probe(struct platform_device *pdev)
+{
+	const struct mtk_hdmi_ver_conf *ver_conf;
+	const struct mtk_hdmi_conf *hdmi_conf;
+	struct device *dev = &pdev->dev;
+	struct mtk_hdmi *hdmi;
+	int ret;
+
+	hdmi_conf = of_device_get_match_data(dev);
+	if (!hdmi_conf)
+		return ERR_PTR(-ENODEV);
+
+	ver_conf = hdmi_conf->ver_conf;
+
+	hdmi = devm_drm_bridge_alloc(dev, struct mtk_hdmi, bridge,
+					ver_conf->bridge_funcs);
+	if (IS_ERR(hdmi))
+		return hdmi;
+
+	hdmi->dev = dev;
+	hdmi->conf = hdmi_conf;
+
+	hdmi->clk = devm_kcalloc(dev, ver_conf->num_clocks, sizeof(*hdmi->clk), GFP_KERNEL);
+	if (!hdmi->clk)
+		return ERR_PTR(-ENOMEM);
+
+	ret = mtk_hdmi_dt_parse_pdata(hdmi, pdev, ver_conf->mtk_hdmi_clock_names,
+				      ver_conf->num_clocks);
+	if (ret)
+		return ERR_PTR(ret);
+
+	hdmi->phy = devm_phy_get(dev, "hdmi");
+	if (IS_ERR(hdmi->phy))
+		return dev_err_cast_probe(dev, hdmi->phy, "Failed to get HDMI PHY\n");
+
+	mutex_init(&hdmi->update_plugged_status_lock);
+	platform_set_drvdata(pdev, hdmi);
+
+	ret = mtk_hdmi_register_audio_driver(dev);
+	if (ret)
+		return dev_err_ptr_probe(dev, ret, "Cannot register HDMI Audio driver\n");
+
+	hdmi->bridge.of_node = pdev->dev.of_node;
+	hdmi->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID
+			 | DRM_BRIDGE_OP_HPD;
+
+	if (ver_conf->bridge_funcs->hdmi_write_infoframe &&
+	    ver_conf->bridge_funcs->hdmi_clear_infoframe)
+		hdmi->bridge.ops |= DRM_BRIDGE_OP_HDMI;
+
+	hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
+	hdmi->bridge.ddc = hdmi->ddc_adpt;
+	hdmi->bridge.vendor = "MediaTek";
+	hdmi->bridge.product = "On-Chip HDMI";
+	hdmi->bridge.interlace_allowed = ver_conf->interlace_allowed;
+
+	ret = devm_drm_bridge_add(dev, &hdmi->bridge);
+	if (ret)
+		return dev_err_ptr_probe(dev, ret, "Failed to add bridge\n");
+
+	return hdmi;
+}
+EXPORT_SYMBOL_NS_GPL(mtk_hdmi_common_probe, "DRM_MTK_HDMI");
+
+MODULE_AUTHOR("AngeloGioacchino Del Regno <[e-mail]>");
+MODULE_DESCRIPTION("MediaTek HDMI Common Library");
+MODULE_LICENSE("GPL");

drivers/gpu/drm/mediatek/mtk_hdmi_common.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2021 MediaTek Inc.
+ * Copyright (c) 2024 Collabora Ltd.
+ */
+
+#ifndef _MTK_HDMI_COMMON_H
+#define _MTK_HDMI_COMMON_H
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_print.h>
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/hdmi.h>
+#include <linux/i2c.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mutex.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+
+#include <sound/hdmi-codec.h>
+
+enum hdmi_aud_input_type {
+	HDMI_AUD_INPUT_I2S = 0,
+	HDMI_AUD_INPUT_SPDIF,
+};
+
+enum hdmi_aud_i2s_fmt {
+	HDMI_I2S_MODE_RJT_24BIT = 0,
+	HDMI_I2S_MODE_RJT_16BIT,
+	HDMI_I2S_MODE_LJT_24BIT,
+	HDMI_I2S_MODE_LJT_16BIT,
+	HDMI_I2S_MODE_I2S_24BIT,
+	HDMI_I2S_MODE_I2S_16BIT
+};
+
+enum hdmi_aud_mclk {
+	HDMI_AUD_MCLK_128FS,
+	HDMI_AUD_MCLK_192FS,
+	HDMI_AUD_MCLK_256FS,
+	HDMI_AUD_MCLK_384FS,
+	HDMI_AUD_MCLK_512FS,
+	HDMI_AUD_MCLK_768FS,
+	HDMI_AUD_MCLK_1152FS,
+};
+
+enum hdmi_aud_channel_type {
+	HDMI_AUD_CHAN_TYPE_1_0 = 0,
+	HDMI_AUD_CHAN_TYPE_1_1,
+	HDMI_AUD_CHAN_TYPE_2_0,
+	HDMI_AUD_CHAN_TYPE_2_1,
+	HDMI_AUD_CHAN_TYPE_3_0,
+	HDMI_AUD_CHAN_TYPE_3_1,
+	HDMI_AUD_CHAN_TYPE_4_0,
+	HDMI_AUD_CHAN_TYPE_4_1,
+	HDMI_AUD_CHAN_TYPE_5_0,
+	HDMI_AUD_CHAN_TYPE_5_1,
+	HDMI_AUD_CHAN_TYPE_6_0,
+	HDMI_AUD_CHAN_TYPE_6_1,
+	HDMI_AUD_CHAN_TYPE_7_0,
+	HDMI_AUD_CHAN_TYPE_7_1,
+	HDMI_AUD_CHAN_TYPE_3_0_LRS,
+	HDMI_AUD_CHAN_TYPE_3_1_LRS,
+	HDMI_AUD_CHAN_TYPE_4_0_CLRS,
+	HDMI_AUD_CHAN_TYPE_4_1_CLRS,
+	HDMI_AUD_CHAN_TYPE_6_1_CS,
+	HDMI_AUD_CHAN_TYPE_6_1_CH,
+	HDMI_AUD_CHAN_TYPE_6_1_OH,
+	HDMI_AUD_CHAN_TYPE_6_1_CHR,
+	HDMI_AUD_CHAN_TYPE_7_1_LH_RH,
+	HDMI_AUD_CHAN_TYPE_7_1_LSR_RSR,
+	HDMI_AUD_CHAN_TYPE_7_1_LC_RC,
+	HDMI_AUD_CHAN_TYPE_7_1_LW_RW,
+	HDMI_AUD_CHAN_TYPE_7_1_LSD_RSD,
+	HDMI_AUD_CHAN_TYPE_7_1_LSS_RSS,
+	HDMI_AUD_CHAN_TYPE_7_1_LHS_RHS,
+	HDMI_AUD_CHAN_TYPE_7_1_CS_CH,
+	HDMI_AUD_CHAN_TYPE_7_1_CS_OH,
+	HDMI_AUD_CHAN_TYPE_7_1_CS_CHR,
+	HDMI_AUD_CHAN_TYPE_7_1_CH_OH,
+	HDMI_AUD_CHAN_TYPE_7_1_CH_CHR,
+	HDMI_AUD_CHAN_TYPE_7_1_OH_CHR,
+	HDMI_AUD_CHAN_TYPE_7_1_LSS_RSS_LSR_RSR,
+	HDMI_AUD_CHAN_TYPE_6_0_CS,
+	HDMI_AUD_CHAN_TYPE_6_0_CH,
+	HDMI_AUD_CHAN_TYPE_6_0_OH,
+	HDMI_AUD_CHAN_TYPE_6_0_CHR,
+	HDMI_AUD_CHAN_TYPE_7_0_LH_RH,
+	HDMI_AUD_CHAN_TYPE_7_0_LSR_RSR,
+	HDMI_AUD_CHAN_TYPE_7_0_LC_RC,
+	HDMI_AUD_CHAN_TYPE_7_0_LW_RW,
+	HDMI_AUD_CHAN_TYPE_7_0_LSD_RSD,
+	HDMI_AUD_CHAN_TYPE_7_0_LSS_RSS,
+	HDMI_AUD_CHAN_TYPE_7_0_LHS_RHS,
+	HDMI_AUD_CHAN_TYPE_7_0_CS_CH,
+	HDMI_AUD_CHAN_TYPE_7_0_CS_OH,
+	HDMI_AUD_CHAN_TYPE_7_0_CS_CHR,
+	HDMI_AUD_CHAN_TYPE_7_0_CH_OH,
+	HDMI_AUD_CHAN_TYPE_7_0_CH_CHR,
+	HDMI_AUD_CHAN_TYPE_7_0_OH_CHR,
+	HDMI_AUD_CHAN_TYPE_7_0_LSS_RSS_LSR_RSR,
+	HDMI_AUD_CHAN_TYPE_8_0_LH_RH_CS,
+	HDMI_AUD_CHAN_TYPE_UNKNOWN = 0xFF
+};
+
+enum hdmi_aud_channel_swap_type {
+	HDMI_AUD_SWAP_LR,
+	HDMI_AUD_SWAP_LFE_CC,
+	HDMI_AUD_SWAP_LSRS,
+	HDMI_AUD_SWAP_RLS_RRS,
+	HDMI_AUD_SWAP_LR_STATUS,
+};
+
+struct hdmi_audio_param {
+	enum hdmi_audio_coding_type aud_codec;
+	enum hdmi_audio_sample_size aud_sample_size;
+	enum hdmi_aud_input_type aud_input_type;
+	enum hdmi_aud_i2s_fmt aud_i2s_fmt;
+	enum hdmi_aud_mclk aud_mclk;
+	enum hdmi_aud_channel_type aud_input_chan_type;
+	struct hdmi_codec_params codec_params;
+};
+
+enum hdmi_hpd_state {
+	HDMI_PLUG_OUT = 0,
+	HDMI_PLUG_IN_AND_SINK_POWER_ON,
+	HDMI_PLUG_IN_ONLY,
+};
+
+struct mtk_hdmi_ver_conf {
+	const struct drm_bridge_funcs *bridge_funcs;
+	const struct hdmi_codec_ops *codec_ops;
+	const char * const *mtk_hdmi_clock_names;
+	int num_clocks;
+	bool interlace_allowed;
+};
+
+struct mtk_hdmi_conf {
+	const struct mtk_hdmi_ver_conf *ver_conf;
+	bool tz_disabled;
+	bool cea_modes_only;
+	unsigned long max_mode_clock;
+	u32 reg_hdmi_tx_cfg;
+};
+
+struct mtk_hdmi {
+	struct drm_bridge bridge;
+	struct drm_bridge *next_bridge;
+	struct drm_connector *curr_conn;/* current connector (only valid when 'enabled') */
+	struct device *dev;
+	const struct mtk_hdmi_conf *conf;
+	struct phy *phy;
+	struct device *cec_dev;
+	struct i2c_adapter *ddc_adpt;
+	struct clk **clk;
+	struct drm_display_mode mode;
+	bool dvi_mode;
+	struct regmap *sys_regmap;
+	unsigned int sys_offset;
+	struct regmap *regs;
+	struct platform_device *audio_pdev;
+	struct hdmi_audio_param aud_param;
+	bool audio_enable;
+	bool powered;
+	bool enabled;
+	unsigned int irq;
+	enum hdmi_hpd_state hpd;
+	hdmi_codec_plugged_cb plugged_cb;
+	struct device *codec_dev;
+	struct mutex update_plugged_status_lock;
+};
+
+static inline struct mtk_hdmi *hdmi_ctx_from_bridge(struct drm_bridge *b)
+{
+	return container_of(b, struct mtk_hdmi, bridge);
+}
+
+
+int mtk_hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size_t len);
+void mtk_hdmi_audio_set_plugged_cb(struct mtk_hdmi *hdmi, hdmi_codec_plugged_cb fn,
+				   struct device *codec_dev);
+int mtk_hdmi_audio_params(struct mtk_hdmi *hdmi, struct hdmi_codec_daifmt *daifmt,
+			  struct hdmi_codec_params *params);
+void mtk_hdmi_get_ncts(unsigned int sample_rate, unsigned int clock,
+		       unsigned int *n, unsigned int *cts);
+bool mtk_hdmi_bridge_mode_fixup(struct drm_bridge *bridge,
+				const struct drm_display_mode *mode,
+				struct drm_display_mode *adjusted_mode);
+void mtk_hdmi_bridge_mode_set(struct drm_bridge *bridge,
+			      const struct drm_display_mode *mode,
+			      const struct drm_display_mode *adjusted_mode);
+struct mtk_hdmi *mtk_hdmi_common_probe(struct platform_device *pdev);
+#endif /* _MTK_HDMI_COMMON_H */

drivers/gpu/drm/mediatek/mtk_hdmi_ddc_v2.c

···
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MediaTek HDMI v2 Display Data Channel Driver
+ *
+ * Copyright (c) 2021 MediaTek Inc.
+ * Copyright (c) 2021 BayLibre, SAS
+ * Copyright (c) 2024 Collabora Ltd.
+ *                    AngeloGioacchino Del Regno <[e-mail]>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+
+#include <drm/drm_edid.h>
+
+#include "mtk_hdmi_common.h"
+#include "mtk_hdmi_regs_v2.h"
+
+#define DDC2_DLY_CNT 572 /* BIM=208M/(v*4) = 90Khz */
+#define DDC2_DLY_CNT_EDID 832 /* BIM=208M/(v*4) = 62.5Khz */
+#define SI2C_ADDR_READ 0xf4
+#define SCDC_I2C_SLAVE_ADDRESS 0x54
+
+struct mtk_hdmi_ddc {
+	struct device *dev;
+	struct regmap *regs;
+	struct clk *clk;
+	struct i2c_adapter adap;
+};
+
+static int mtk_ddc_check_and_rise_low_bus(struct mtk_hdmi_ddc *ddc)
+{
+	u32 val;
+
+	regmap_read(ddc->regs, HDCP2X_DDCM_STATUS, &val);
+	if (val & DDC_I2C_BUS_LOW) {
+		regmap_update_bits(ddc->regs, DDC_CTRL, DDC_CTRL_CMD,
+				   FIELD_PREP(DDC_CTRL_CMD, DDC_CMD_CLOCK_SCL));
+		usleep_range(250, 300);
+	}
+
+	if (val & DDC_I2C_NO_ACK) {
+		u32 ddc_ctrl, hpd_ddc_ctrl, hpd_ddc_status;
+
+		regmap_read(ddc->regs, DDC_CTRL, &ddc_ctrl);
+		regmap_read(ddc->regs, HPD_DDC_CTRL, &hpd_ddc_ctrl);
+		regmap_read(ddc->regs, HPD_DDC_STATUS, &hpd_ddc_status);
+	}
+
+	if (val & DDC_I2C_NO_ACK)
+		return -EIO;
+
+	return 0;
+}
+
+static int mtk_ddc_wr_one(struct mtk_hdmi_ddc *ddc, u16 addr_id,
+			  u16 offset_id, u8 *wr_data)
+{
+	u32 val;
+	int ret;
+
+	/* If down, rise bus for write operation */
+	mtk_ddc_check_and_rise_low_bus(ddc);
+
+	regmap_update_bits(ddc->regs, HPD_DDC_CTRL, HPD_DDC_DELAY_CNT,
+			   FIELD_PREP(HPD_DDC_DELAY_CNT, DDC2_DLY_CNT));
+
+	if (wr_data) {
+		regmap_write(ddc->regs, SI2C_CTRL,
+			     FIELD_PREP(SI2C_ADDR, SI2C_ADDR_READ) |
+			     FIELD_PREP(SI2C_WDATA, *wr_data) |
+			     SI2C_WR);
+	}
+
+	regmap_write(ddc->regs, DDC_CTRL,
+		     FIELD_PREP(DDC_CTRL_CMD, DDC_CMD_SEQ_WRITE) |
+		     FIELD_PREP(DDC_CTRL_DIN_CNT, wr_data == NULL ? 0 : 1) |
+		     FIELD_PREP(DDC_CTRL_OFFSET, offset_id) |
+		     FIELD_PREP(DDC_CTRL_ADDR, addr_id));
+	usleep_range(1000, 1250);
+
+	ret = regmap_read_poll_timeout(ddc->regs, HPD_DDC_STATUS, val,
+				       !(val & DDC_I2C_IN_PROG), 500, 1000);
+	if (ret) {
+		dev_err(ddc->dev, "DDC I2C write timeout\n");
+		return ret;
+	}
+
+	/* The I2C bus might be down after WR operation: rise it again */
+	ret = mtk_ddc_check_and_rise_low_bus(ddc);
+	if (ret) {
+		dev_err(ddc->dev, "Error during write operation: No ACK\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int mtk_ddcm_read_hdmi(struct mtk_hdmi_ddc *ddc, u16 uc_dev,
+			      u8 addr, u8 *puc_value, u16 data_cnt)
+{
+	u16 dly_cnt, i, uc_idx;
+	u32 rem, temp_length, uc_read_count, val;
+	u64 loop_counter;
+	int ret;
+
+	mtk_ddc_check_and_rise_low_bus(ddc);
+
+	regmap_update_bits(ddc->regs, DDC_CTRL, DDC_CTRL_CMD,
+			   FIELD_PREP(DDC_CTRL_CMD, DDC_CMD_CLEAR_FIFO));
+
+	if (data_cnt >= 16) {
+		temp_length = 16;
+		loop_counter = data_cnt;
+
+		rem = do_div(loop_counter, temp_length);
+		if (rem)
+			loop_counter++;
+	} else {
+		temp_length = data_cnt;
+		loop_counter = 1;
+	}
+
+	if (uc_dev >= DDC_ADDR)
+		dly_cnt = DDC2_DLY_CNT_EDID;
+	else
+		dly_cnt = DDC2_DLY_CNT;
+
+	regmap_update_bits(ddc->regs, HPD_DDC_CTRL, HPD_DDC_DELAY_CNT,
+			   FIELD_PREP(HPD_DDC_DELAY_CNT, dly_cnt));
+
+	for (i = 0; i < loop_counter; i++) {
+		rem = data_cnt % 16;
+
+		if (i > 0 && i == (loop_counter - 1) && rem)
+			temp_length = rem;
+
+		/* 0x51 - 0x53: Flow control */
+		if (uc_dev > DDC_ADDR && uc_dev <= 0x53) {
+			regmap_update_bits(ddc->regs, SCDC_CTRL, SCDC_DDC_SEGMENT,
+					   FIELD_PREP(SCDC_DDC_SEGMENT, uc_dev - DDC_ADDR));
+
+			regmap_write(ddc->regs, DDC_CTRL,
+				     FIELD_PREP(DDC_CTRL_CMD, DDC_CMD_ENH_READ_NOACK) |
+				     FIELD_PREP(DDC_CTRL_DIN_CNT, temp_length) |
+				     FIELD_PREP(DDC_CTRL_OFFSET, addr + i * temp_length) |
+				     FIELD_PREP(DDC_CTRL_ADDR, DDC_ADDR));
+		} else {
+			u16 offset;
+
+			if (addr != 0x43)
+				offset = i * 16;
+			else
+				offset = 0;
+
+			regmap_write(ddc->regs, DDC_CTRL,
+				     FIELD_PREP(DDC_CTRL_CMD, DDC_CMD_SEQ_READ_NOACK) |
+				     FIELD_PREP(DDC_CTRL_DIN_CNT, temp_length) |
+				     FIELD_PREP(DDC_CTRL_OFFSET, addr + offset) |
+				     FIELD_PREP(DDC_CTRL_ADDR, uc_dev));
+		}
+		usleep_range(5000, 5500);
+
+		ret = regmap_read_poll_timeout(ddc->regs, HPD_DDC_STATUS, val,
+					       !(val & DDC_I2C_IN_PROG), 1000,
+					       500 * (temp_length + 5));
+		if (ret) {
+			dev_err(ddc->dev, "Timeout waiting for DDC I2C\n");
+			return ret;
+		}
+
+		ret = mtk_ddc_check_and_rise_low_bus(ddc);
+		if (ret) {
+			dev_err(ddc->dev, "Error during read operation: No ACK\n");
+			return ret;
+		}
+
+		for (uc_idx = 0; uc_idx < temp_length; uc_idx++) {
+			unsigned int read_idx = i * 16 + uc_idx;
+
+			regmap_write(ddc->regs, SI2C_CTRL,
+				     FIELD_PREP(SI2C_ADDR, SI2C_ADDR_READ) |
+				     SI2C_RD);
+
+			regmap_read(ddc->regs, HPD_DDC_STATUS, &val);
+			puc_value[read_idx] = FIELD_GET(DDC_DATA_OUT, val);
+
+			regmap_write(ddc->regs, SI2C_CTRL,
+				     FIELD_PREP(SI2C_ADDR, SI2C_ADDR_READ) |
+				     SI2C_CONFIRM_READ);
+
+			/*
+			 * If HDMI IP gets reset during EDID read, DDC read
+			 * operation will fail and its delay counter will be
+			 * reset to 400.
+			 */
+			regmap_read(ddc->regs, HPD_DDC_CTRL, &val);
+			if (FIELD_GET(HPD_DDC_DELAY_CNT, val) < DDC2_DLY_CNT)
+				return 0;
+
+			uc_read_count = read_idx + 1;
+		}
+	}
+	if (uc_read_count > U8_MAX)
+		dev_warn(ddc->dev, "Invalid read data count %u\n", uc_read_count);
+
+	return uc_read_count;
+}
+
+static int mtk_hdmi_fg_ddc_data_read(struct mtk_hdmi_ddc *ddc, u16 b_dev,
+				     u8 data_addr, u16 data_cnt, u8 *pr_data)
+{
+	int read_data_cnt;
+	u16 req_data_cnt;
+
+	if (!data_cnt) {
+		dev_err(ddc->dev, "Invalid DDCM read request\n");
+		return -EINVAL;
+	}
+
+	req_data_cnt = U8_MAX - data_addr + 1;
+	if (req_data_cnt > data_cnt)
+		req_data_cnt = data_cnt;
+
+	regmap_set_bits(ddc->regs, HDCP2X_POL_CTRL, HDCP2X_DIS_POLL_EN);
+
+	read_data_cnt = mtk_ddcm_read_hdmi(ddc, b_dev, data_addr, pr_data, req_data_cnt);
+
+	if (read_data_cnt < 0)
+		return read_data_cnt;
+	else if (read_data_cnt != req_data_cnt)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int mtk_hdmi_ddc_fg_data_write(struct mtk_hdmi_ddc *ddc, u16 b_dev,
+				      u8 data_addr, u16 data_cnt, u8 *pr_data)
+{
+	int i, ret;
+
+	regmap_set_bits(ddc->regs, HDCP2X_POL_CTRL, HDCP2X_DIS_POLL_EN);
+	/*
+	 * In case there is no payload data, just do a single write for the
+	 * address only
+	 */
+	if (data_cnt == 0)
+		return mtk_ddc_wr_one(ddc, b_dev, data_addr, NULL);
+
+	i = 0;
+	do {
+		ret = mtk_ddc_wr_one(ddc, b_dev, data_addr + i, pr_data + i);
+		if (ret)
+			return ret;
+	} while (++i < data_cnt);
+
+	return 0;
+}
+
+static int mtk_hdmi_ddc_v2_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs, int num)
+{
+	struct mtk_hdmi_ddc *ddc;
+	u8 offset = 0;
+	int i, ret;
+
+	ddc = adapter->algo_data;
+
+	for (i = 0; i < num; i++) {
+		struct i2c_msg *msg = &msgs[i];
+
+		if (!msg->buf) {
+			dev_err(ddc->dev, "No message buffer\n");
+			return -EINVAL;
+		}
+
+		if (msg->flags & I2C_M_RD) {
+			/*
+			 * The underlying DDC hardware always issues a write request
+			 * that assigns the read offset as part of the read operation,
+			 * therefore, use the `offset` value assigned in the previous
+			 * write request from drm_edid
+			 */
+			ret = mtk_hdmi_fg_ddc_data_read(ddc, msg->addr, offset,
+							msg->len, &msg->buf[0]);
+			if (ret)
+				return ret;
+		} else {
+			/*
+			 * The HW needs the data offset, found in buf[0], in the
+			 * DDC_CTRL register, and each byte of data, starting at
+			 * buf[1], goes in the SI2C_WDATA register.
+			 */
+			ret = mtk_hdmi_ddc_fg_data_write(ddc, msg->addr, msg->buf[0],
+							 msg->len - 1, &msg->buf[1]);
+			if (ret)
+				return ret;
+
+			/*
+			 * Store the offset value requested by drm_edid or by
+			 * scdc to use in subsequent read requests.
+			 */
+			if ((msg->addr == DDC_ADDR || msg->addr == SCDC_I2C_SLAVE_ADDRESS) &&
+			    msg->len == 1) {
+				offset = msg->buf[0];
+			}
+		}
+	}
+
+	return i;
+}
+
+static u32 mtk_hdmi_ddc_v2_func(struct i2c_adapter *adapter)
+{
+	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+}
+
+static const struct i2c_algorithm mtk_hdmi_ddc_v2_algorithm = {
+	.master_xfer = mtk_hdmi_ddc_v2_xfer,
+	.functionality = mtk_hdmi_ddc_v2_func,
+};
+
+static int mtk_hdmi_ddc_v2_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct mtk_hdmi_ddc *ddc;
+	int ret;
+
+	ddc = devm_kzalloc(dev, sizeof(*ddc), GFP_KERNEL);
+	if (!ddc)
+		return -ENOMEM;
+
+	ddc->dev = dev;
+	ddc->regs = device_node_to_regmap(dev->parent->of_node);
+	if (IS_ERR_OR_NULL(ddc->regs))
+		return dev_err_probe(dev,
+				     IS_ERR(ddc->regs) ? PTR_ERR(ddc->regs) : -EINVAL,
+				     "Cannot get regmap\n");
+
+	ddc->clk = devm_clk_get_enabled(dev, NULL);
+	if (IS_ERR(ddc->clk))
+		return dev_err_probe(dev, PTR_ERR(ddc->clk), "Cannot get DDC clock\n");
+
+	strscpy(ddc->adap.name, "mediatek-hdmi-ddc-v2", sizeof(ddc->adap.name));
+	ddc->adap.owner = THIS_MODULE;
+	ddc->adap.algo = &mtk_hdmi_ddc_v2_algorithm;
+	ddc->adap.retries = 3;
+	ddc->adap.dev.of_node = dev->of_node;
+	ddc->adap.algo_data = ddc;
+	ddc->adap.dev.parent = &pdev->dev;
+
+	ret = devm_pm_runtime_enable(&pdev->dev);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "Cannot enable Runtime PM\n");
+
+	pm_runtime_get_sync(dev);
+
+	ret = devm_i2c_add_adapter(dev, &ddc->adap);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "Cannot add DDC I2C adapter\n");
+
+	platform_set_drvdata(pdev, ddc);
+	return 0;
+}
+
+static const struct of_device_id mtk_hdmi_ddc_v2_match[] = {
+	{ .compatible = "mediatek,mt8195-hdmi-ddc" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mtk_hdmi_ddc_v2_match);
+
+struct platform_driver mtk_hdmi_ddc_v2_driver = {
+	.probe = mtk_hdmi_ddc_v2_probe,
+	.driver = {
+		.name = "mediatek-hdmi-ddc-v2",
+		.of_match_table = mtk_hdmi_ddc_v2_match,
+	},
+};
+module_platform_driver(mtk_hdmi_ddc_v2_driver);
+
+MODULE_AUTHOR("AngeloGioacchino Del Regno <[e-mail]>");
+MODULE_AUTHOR("Can Zeng <[e-mail]>");
+MODULE_DESCRIPTION("MediaTek HDMIv2 DDC Driver");
+MODULE_LICENSE("GPL");

drivers/gpu/drm/mediatek/mtk_hdmi_regs_v2.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2021 MediaTek Inc.
+ * Copyright (c) 2021 BayLibre, SAS
+ * Copyright (c) 2024 Collabora Ltd.
+ *                    AngeloGioacchino Del Regno <[e-mail]>
+ */
+
+#ifndef _MTK_HDMI_REGS_H
+#define _MTK_HDMI_REGS_H
+
+/* HDMI_TOP Config */
+#define TOP_CFG00			0x000
+#define  HDMI2_ON			BIT(2)
+#define  HDMI_MODE_HDMI			BIT(3)
+#define  SCR_ON				BIT(4)
+#define  TMDS_PACK_MODE			GENMASK(9, 8)
+#define   TMDS_PACK_MODE_8BPP		0
+#define   TMDS_PACK_MODE_10BPP		1
+#define   TMDS_PACK_MODE_12BPP		2
+#define   TMDS_PACK_MODE_16BPP		3
+#define  DEEPCOLOR_PKT_EN		BIT(12)
+#define  HDMI_ABIST_VIDEO_FORMAT	GENMASK(21, 16)
+#define  HDMI_ABIST_ENABLE		BIT(31)
+#define TOP_CFG01 0x004
+#define  CP_SET_MUTE_EN			BIT(0)
+#define  CP_CLR_MUTE_EN			BIT(1)
+#define  NULL_PKT_EN			BIT(2)
+#define  NULL_PKT_VSYNC_HIGH_EN		BIT(3)
+
+/* HDMI_TOP Audio: Channel Mapping */
+#define TOP_AUD_MAP			0x00c
+#define  SD0_MAP			GENMASK(2, 0)
+#define  SD1_MAP			GENMASK(6, 4)
+#define  SD2_MAP			GENMASK(10, 8)
+#define  SD3_MAP			GENMASK(14, 12)
+#define  SD4_MAP			GENMASK(18, 16)
+#define  SD5_MAP			GENMASK(22, 20)
+#define  SD6_MAP			GENMASK(26, 24)
+#define  SD7_MAP			GENMASK(30, 28)
+
+/* Auxiliary Video Information (AVI) Infoframe */
+#define TOP_AVI_HEADER			0x024
+#define TOP_AVI_PKT00			0x028
+#define TOP_AVI_PKT01			0x02C
+#define TOP_AVI_PKT02			0x030
+#define TOP_AVI_PKT03			0x034
+#define TOP_AVI_PKT04			0x038
+#define TOP_AVI_PKT05			0x03C
+
+/* Audio Interface Infoframe */
+#define TOP_AIF_HEADER			0x040
+#define TOP_AIF_PKT00			0x044
+#define TOP_AIF_PKT01			0x048
+#define TOP_AIF_PKT02			0x04c
+#define TOP_AIF_PKT03			0x050
+
+/* Audio SPDIF Infoframe */
+#define TOP_SPDIF_HEADER		0x054
+#define TOP_SPDIF_PKT00			0x058
+#define TOP_SPDIF_PKT01			0x05c
+#define TOP_SPDIF_PKT02			0x060
+#define TOP_SPDIF_PKT03			0x064
+#define TOP_SPDIF_PKT04			0x068
+#define TOP_SPDIF_PKT05			0x06c
+#define TOP_SPDIF_PKT06			0x070
+#define TOP_SPDIF_PKT07			0x074
+
+/* Infoframes Configuration */
+#define TOP_INFO_EN			0x01c
+#define  AVI_EN				BIT(0)
+#define  SPD_EN				BIT(1)
+#define  AUD_EN				BIT(2)
+#define  CP_EN				BIT(5)
+#define  VSIF_EN			BIT(11)
+#define  AVI_EN_WR			BIT(16)
+#define  SPD_EN_WR			BIT(17)
+#define  AUD_EN_WR			BIT(18)
+#define  CP_EN_WR			BIT(21)
+#define  VSIF_EN_WR			BIT(27)
+#define TOP_INFO_RPT			0x020
+#define  AVI_RPT_EN			BIT(0)
+#define  SPD_RPT_EN			BIT(1)
+#define  AUD_RPT_EN			BIT(2)
+#define  CP_RPT_EN			BIT(5)
+#define  VSIF_RPT_EN			BIT(11)
+
+/* Vendor Specific Infoframe */
+#define TOP_VSIF_HEADER			0x174
+#define TOP_VSIF_PKT00			0x178
+#define TOP_VSIF_PKT01			0x17c
+#define TOP_VSIF_PKT02			0x180
+#define TOP_VSIF_PKT03			0x184
+#define TOP_VSIF_PKT04			0x188
+#define TOP_VSIF_PKT05			0x18c
+#define TOP_VSIF_PKT06			0x190
+#define TOP_VSIF_PKT07			0x194
+
+/* HDMI_TOP Misc */
+#define TOP_MISC_CTLR			0x1a4
+#define  DEEP_COLOR_ADD			BIT(4)
+
+/* Hardware interrupts */
+#define TOP_INT_STA00			0x1a8
+#define TOP_INT_ENABLE00		0x1b0
+#define  HTPLG_R_INT			BIT(0)
+#define  HTPLG_F_INT			BIT(1)
+#define  PORD_R_INT			BIT(2)
+#define  PORD_F_INT			BIT(3)
+#define  HDMI_VSYNC_INT			BIT(4)
+#define  HDMI_AUDIO_INT			BIT(5)
+#define  HDCP2X_RX_REAUTH_REQ_DDCM_INT	BIT(25)
+#define TOP_INT_ENABLE01		0x1b4
+#define TOP_INT_CLR00			0x1b8
+#define TOP_INT_CLR01			0x1bc
+
+
+/* Video Mute */
+#define TOP_VMUTE_CFG1			0x1c8
+#define  REG_VMUTE_EN			BIT(16)
+
+/* HDMI Audio IP */
+#define AIP_CTRL			0x400
+#define  CTS_SW_SEL			BIT(0)
+#define  CTS_REQ_EN			BIT(1)
+#define  MCLK_EN			BIT(2)
+#define  NO_MCLK_CTSGEN_SEL		BIT(3)
+#define  AUD_IN_EN			BIT(8)
+#define  AUD_SEL_OWRT			BIT(9)
+#define  SPDIF_EN			BIT(13)
+#define  HBRA_ON			BIT(14)
+#define  DSD_EN				BIT(15)
+#define  I2S_EN				GENMASK(19, 16)
+#define  HBR_FROM_SPDIF			BIT(20)
+#define  CTS_CAL_N4			BIT(23)
+#define  SPDIF_INTERNAL_MODULE		BIT(24)
+#define AIP_N_VAL			0x404
+#define AIP_CTS_SVAL			0x408
+#define AIP_SPDIF_CTRL			0x40c
+#define  WR_1UI_LOCK			BIT(0)
+#define  FS_OVERRIDE_WRITE		BIT(1)
+#define  WR_2UI_LOCK			BIT(2)
+#define  MAX_1UI_WRITE			GENMASK(15, 8)
+#define  MAX_2UI_SPDIF_WRITE		GENMASK(23, 16)
+#define  MAX_2UI_I2S_HI_WRITE		GENMASK(23, 20)
+#define   MAX_2UI_I2S_LFE_CC_SWAP	BIT(1)
+#define  MAX_2UI_I2S_LO_WRITE		GENMASK(19, 16)
+#define  AUD_ERR_THRESH			GENMASK(29, 24)
+#define  I2S2DSD_EN			BIT(30)
+#define AIP_I2S_CTRL			0x410
+#define  FIFO0_MAP			GENMASK(1, 0)
+#define  FIFO1_MAP			GENMASK(3, 2)
+#define  FIFO2_MAP			GENMASK(5, 4)
+#define  FIFO3_MAP			GENMASK(7, 6)
+#define  I2S_1ST_BIT_NOSHIFT		BIT(8)
+#define  I2S_DATA_DIR_LSB		BIT(9)
+#define  JUSTIFY_RIGHT			BIT(10)
+#define  WS_HIGH			BIT(11)
+#define  VBIT_COMPRESSED		BIT(12)
+#define  CBIT_ORDER_SAME		BIT(13)
+#define  SCK_EDGE_RISE			BIT(14)
+#define AIP_I2S_CHST0			0x414
+#define AIP_I2S_CHST1			0x418
+#define AIP_TXCTRL			0x424
+#define  RST4AUDIO			BIT(0)
+#define  RST4AUDIO_FIFO			BIT(1)
+#define  RST4AUDIO_ACR			BIT(2)
+#define  AUD_LAYOUT_1			BIT(4)
+#define  AUD_MUTE_FIFO_EN		BIT(5)
+#define  AUD_PACKET_DROP		BIT(6)
+#define  DSD_MUTE_EN			BIT(7)
+#define AIP_TPI_CTRL			0x428
+#define  TPI_AUDIO_LOOKUP_EN		BIT(2)
+
+/* Video downsampling configuration */
+#define VID_DOWNSAMPLE_CONFIG		0x8d0
+#define  C444_C422_CONFIG_ENABLE	BIT(0)
+#define  C422_C420_CONFIG_ENABLE	BIT(4)
+#define  C422_C420_CONFIG_BYPASS	BIT(5)
+#define  C422_C420_CONFIG_OUT_CB_OR_CR	BIT(6)
+#define VID_OUT_FORMAT			0x8fc
+#define  OUTPUT_FORMAT_DEMUX_420_ENABLE	BIT(10)
+
+/* HDCP registers */
+#define HDCP_TOP_CTRL			0xc00
+#define HDCP2X_CTRL_0			0xc20
+#define  HDCP2X_EN			BIT(0)
+#define  HDCP2X_ENCRYPT_EN		BIT(7)
+#define  HDCP2X_HPD_OVR			BIT(10)
+#define  HDCP2X_HPD_SW			BIT(11)
+#define HDCP2X_POL_CTRL			0xc54
+#define  HDCP2X_DIS_POLL_EN		BIT(16)
+#define HDCP1X_CTRL			0xcd0
+#define  HDCP1X_ENC_EN			BIT(6)
+
+/* HDMI DDC registers */
+#define HPD_DDC_CTRL			0xc08
+#define  HPD_DDC_DELAY_CNT		GENMASK(31, 16)
+#define  HPD_DDC_HPD_DBNC_EN		BIT(2)
+#define  HPD_DDC_PORD_DBNC_EN		BIT(3)
+#define DDC_CTRL			0xc10
+#define  DDC_CTRL_ADDR			GENMASK(7, 1)
+#define  DDC_CTRL_OFFSET		GENMASK(15, 8)
+#define  DDC_CTRL_DIN_CNT		GENMASK(25, 16)
+#define  DDC_CTRL_CMD			GENMASK(31, 28)
+#define SCDC_CTRL			0xc18
+#define  SCDC_DDC_SEGMENT		GENMASK(15, 8)
+#define HPD_DDC_STATUS			0xc60
+#define  HPD_STATE			GENMASK(1, 0)
+#define   HPD_STATE_CONNECTED		2
+#define  HPD_PIN_STA			BIT(4)
+#define  PORD_PIN_STA			BIT(5)
+#define  DDC_I2C_IN_PROG		BIT(13)
+#define  DDC_DATA_OUT			GENMASK(23, 16)
+#define SI2C_CTRL			0xcac
+#define  SI2C_WR			BIT(0)
+#define  SI2C_RD			BIT(1)
+#define  SI2C_CONFIRM_READ		BIT(2)
+#define  SI2C_WDATA			GENMASK(15, 8)
+#define  SI2C_ADDR			GENMASK(23, 16)
+
+/* HDCP DDC registers */
+#define HDCP2X_DDCM_STATUS		0xc68
+#define  DDC_I2C_NO_ACK			BIT(10)
+#define  DDC_I2C_BUS_LOW		BIT(11)
+
+/* HDMI TX registers */
+#define HDMITX_CONFIG_MT8188		0xea0
+#define HDMITX_CONFIG_MT8195		0x900
+#define  HDMI_YUV420_MODE		BIT(10)
+#define  HDMITX_SW_HPD			BIT(29)
+#define  HDMITX_SW_RSTB			BIT(31)
+
+/**
+ * enum mtk_hdmi_ddc_v2_cmds - DDC_CMD register commands
+ * @DDC_CMD_READ_NOACK:      Current address read with no ACK on last byte
+ * @DDC_CMD_READ:            Current address read with ACK on last byte
+ * @DDC_CMD_SEQ_READ_NOACK:  Sequential read with no ACK on last byte
+ * @DDC_CMD_SEQ_READ:        Sequential read with ACK on last byte
+ * @DDC_CMD_ENH_READ_NOACK:  Enhanced read with no ACK on last byte
+ * @DDC_CMD_ENH_READ:        Enhanced read with ACK on last byte
+ * @DDC_CMD_SEQ_WRITE_NOACK: Sequential write ignoring ACK on last byte
+ * @DDC_CMD_SEQ_WRITE:       Sequential write requiring ACK on last byte
+ * @DDC_CMD_RSVD:            Reserved for future use
+ * @DDC_CMD_CLEAR_FIFO:      Clear DDC I2C FIFO
+ * @DDC_CMD_CLOCK_SCL:       Start clocking DDC I2C SCL
+ * @DDC_CMD_ABORT_XFER:      Abort DDC I2C transaction
+ */
+enum mtk_hdmi_ddc_v2_cmds {
+	DDC_CMD_READ_NOACK = 0x0,
+	DDC_CMD_READ,
+	DDC_CMD_SEQ_READ_NOACK,
+	DDC_CMD_SEQ_READ,
+	DDC_CMD_ENH_READ_NOACK,
+	DDC_CMD_ENH_READ,
+	DDC_CMD_SEQ_WRITE_NOACK,
+	DDC_CMD_SEQ_WRITE = 0x07,
+	DDC_CMD_CLEAR_FIFO = 0x09,
+	DDC_CMD_CLOCK_SCL = 0x0a,
+	DDC_CMD_ABORT_XFER = 0x0f
+};
+
+#endif /* _MTK_HDMI_REGS_H */

drivers/gpu/drm/mediatek/mtk_hdmi_v2.c

···
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MediaTek HDMI v2 IP driver
+ *
+ * Copyright (c) 2022 MediaTek Inc.
+ * Copyright (c) 2022 BayLibre, SAS
+ * Copyright (c) 2024 Collabora Ltd.
+ *                    AngeloGioacchino Del Regno <[e-mail]>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/suspend.h>
+#include <linux/units.h>
+#include <linux/phy/phy.h>
+
+#include <drm/display/drm_hdmi_helper.h>
+#include <drm/display/drm_hdmi_state_helper.h>
+#include <drm/display/drm_scdc_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include "mtk_hdmi_common.h"
+#include "mtk_hdmi_regs_v2.h"
+
+#define MTK_HDMI_V2_CLOCK_MIN	27000
+#define MTK_HDMI_V2_CLOCK_MAX	594000
+
+#define HPD_PORD_HWIRQS		(HTPLG_R_INT | HTPLG_F_INT | PORD_F_INT | PORD_R_INT)
+
+enum mtk_hdmi_v2_clk_id {
+	MTK_HDMI_V2_CLK_HDCP_SEL,
+	MTK_HDMI_V2_CLK_HDCP_24M_SEL,
+	MTK_HDMI_V2_CLK_VPP_SPLIT_HDMI,
+	MTK_HDMI_V2_CLK_HDMI_APB_SEL,
+	MTK_HDMI_V2_CLK_COUNT,
+};
+
+const char *const mtk_hdmi_v2_clk_names[MTK_HDMI_V2_CLK_COUNT] = {
+	[MTK_HDMI_V2_CLK_HDMI_APB_SEL] = "bus",
+	[MTK_HDMI_V2_CLK_HDCP_SEL] = "hdcp",
+	[MTK_HDMI_V2_CLK_HDCP_24M_SEL] = "hdcp24m",
+	[MTK_HDMI_V2_CLK_VPP_SPLIT_HDMI] = "hdmi-split",
+};
+
+static inline void mtk_hdmi_v2_hwirq_disable(struct mtk_hdmi *hdmi)
+{
+	regmap_write(hdmi->regs, TOP_INT_ENABLE00, 0);
+	regmap_write(hdmi->regs, TOP_INT_ENABLE01, 0);
+}
+
+static inline void mtk_hdmi_v2_enable_hpd_pord_irq(struct mtk_hdmi *hdmi, bool enable)
+{
+	if (enable)
+		regmap_set_bits(hdmi->regs, TOP_INT_ENABLE00, HPD_PORD_HWIRQS);
+	else
+		regmap_clear_bits(hdmi->regs, TOP_INT_ENABLE00, HPD_PORD_HWIRQS);
+}
+
+static inline void mtk_hdmi_v2_set_sw_hpd(struct mtk_hdmi *hdmi, bool enable)
+{
+	if (enable) {
+		regmap_set_bits(hdmi->regs, hdmi->conf->reg_hdmi_tx_cfg, HDMITX_SW_HPD);
+		regmap_set_bits(hdmi->regs, HDCP2X_CTRL_0, HDCP2X_HPD_OVR);
+		regmap_set_bits(hdmi->regs, HDCP2X_CTRL_0, HDCP2X_HPD_SW);
+	} else {
+		regmap_clear_bits(hdmi->regs, HDCP2X_CTRL_0, HDCP2X_HPD_OVR);
+		regmap_clear_bits(hdmi->regs, HDCP2X_CTRL_0, HDCP2X_HPD_SW);
+		regmap_clear_bits(hdmi->regs, hdmi->conf->reg_hdmi_tx_cfg, HDMITX_SW_HPD);
+	}
+}
+
+static inline void mtk_hdmi_v2_enable_scrambling(struct mtk_hdmi *hdmi, bool enable)
+{
+	struct drm_scdc *scdc = &hdmi->curr_conn->display_info.hdmi.scdc;
+
+	if (enable)
+		regmap_set_bits(hdmi->regs, TOP_CFG00, SCR_ON | HDMI2_ON);
+	else
+		regmap_clear_bits(hdmi->regs, TOP_CFG00, SCR_ON | HDMI2_ON);
+
+	if (scdc->supported) {
+		if (scdc->scrambling.supported)
+			drm_scdc_set_scrambling(hdmi->curr_conn, enable);
+		drm_scdc_set_high_tmds_clock_ratio(hdmi->curr_conn, enable);
+	}
+}
+
+static void mtk_hdmi_v2_hw_vid_mute(struct mtk_hdmi *hdmi, bool enable)
+{
+	/* If enabled, sends a black image */
+	if (enable)
+		regmap_set_bits(hdmi->regs, TOP_VMUTE_CFG1, REG_VMUTE_EN);
+	else
+		regmap_clear_bits(hdmi->regs, TOP_VMUTE_CFG1, REG_VMUTE_EN);
+}
+
+static void mtk_hdmi_v2_hw_aud_mute(struct mtk_hdmi *hdmi, bool enable)
+{
+	u32 aip, val;
+
+	if (!enable) {
+		regmap_clear_bits(hdmi->regs, AIP_TXCTRL, AUD_MUTE_FIFO_EN);
+		return;
+	}
+
+	regmap_read(hdmi->regs, AIP_CTRL, &aip);
+
+	val = AUD_MUTE_FIFO_EN;
+	if (aip & DSD_EN)
+		val |= DSD_MUTE_EN;
+
+	regmap_update_bits(hdmi->regs, AIP_TXCTRL, val, val);
+}
+
+static void mtk_hdmi_v2_hw_reset(struct mtk_hdmi *hdmi)
+{
+	regmap_clear_bits(hdmi->regs, hdmi->conf->reg_hdmi_tx_cfg, HDMITX_SW_RSTB);
+	udelay(5);
+	regmap_set_bits(hdmi->regs, hdmi->conf->reg_hdmi_tx_cfg, HDMITX_SW_RSTB);
+}
+
+static inline u32 mtk_hdmi_v2_format_hw_packet(const u8 *buffer, u8 len)
+{
+	unsigned short i;
+	u32 val = 0;
+
+	for (i = 0; i < len; i++)
+		val |= buffer[i] << (i * 8);
+
+	return val;
+}
+
+static void mtk_hdmi_v2_hw_write_audio_infoframe(struct mtk_hdmi *hdmi, const u8 *buffer)
+{
+	regmap_clear_bits(hdmi->regs, TOP_INFO_EN, AUD_EN | AUD_EN_WR);
+	regmap_clear_bits(hdmi->regs, TOP_INFO_RPT, AUD_RPT_EN);
+
+	regmap_write(hdmi->regs, TOP_AIF_HEADER, mtk_hdmi_v2_format_hw_packet(&buffer[0], 3));
+	regmap_write(hdmi->regs, TOP_AIF_PKT00, mtk_hdmi_v2_format_hw_packet(&buffer[3], 3));
+	regmap_write(hdmi->regs, TOP_AIF_PKT01, mtk_hdmi_v2_format_hw_packet(&buffer[7], 2));
+	regmap_write(hdmi->regs, TOP_AIF_PKT02, 0);
+	regmap_write(hdmi->regs, TOP_AIF_PKT03, 0);
+
+	regmap_set_bits(hdmi->regs, TOP_INFO_RPT, AUD_RPT_EN);
+	regmap_set_bits(hdmi->regs, TOP_INFO_EN, AUD_EN | AUD_EN_WR);
+}
+
+static void mtk_hdmi_v2_hw_write_avi_infoframe(struct mtk_hdmi *hdmi, const u8 *buffer)
+{
+	regmap_clear_bits(hdmi->regs, TOP_INFO_EN, AVI_EN_WR | AVI_EN);
+	regmap_clear_bits(hdmi->regs, TOP_INFO_RPT, AVI_RPT_EN);
+
+	regmap_write(hdmi->regs, TOP_AVI_HEADER, mtk_hdmi_v2_format_hw_packet(&buffer[0], 3));
+	regmap_write(hdmi->regs, TOP_AVI_PKT00, mtk_hdmi_v2_format_hw_packet(&buffer[3], 4));
+	regmap_write(hdmi->regs, TOP_AVI_PKT01, mtk_hdmi_v2_format_hw_packet(&buffer[7], 3));
+	regmap_write(hdmi->regs, TOP_AVI_PKT02, mtk_hdmi_v2_format_hw_packet(&buffer[10], 4));
+	regmap_write(hdmi->regs, TOP_AVI_PKT03, mtk_hdmi_v2_format_hw_packet(&buffer[14], 3));
+	regmap_write(hdmi->regs, TOP_AVI_PKT04, 0);
+	regmap_write(hdmi->regs, TOP_AVI_PKT05, 0);
+
+	regmap_set_bits(hdmi->regs, TOP_INFO_RPT, AVI_RPT_EN);
+	regmap_set_bits(hdmi->regs, TOP_INFO_EN, AVI_EN_WR | AVI_EN);
+}
+
+static void mtk_hdmi_v2_hw_write_spd_infoframe(struct mtk_hdmi *hdmi, const u8 *buffer)
+{
+	regmap_clear_bits(hdmi->regs, TOP_INFO_EN, SPD_EN_WR | SPD_EN);
+	regmap_clear_bits(hdmi->regs, TOP_INFO_RPT, SPD_RPT_EN);
+
+	regmap_write(hdmi->regs, TOP_SPDIF_HEADER, mtk_hdmi_v2_format_hw_packet(&buffer[0], 3));
+	regmap_write(hdmi->regs, TOP_SPDIF_PKT00, mtk_hdmi_v2_format_hw_packet(&buffer[3], 4));
+	regmap_write(hdmi->regs, TOP_SPDIF_PKT01, mtk_hdmi_v2_format_hw_packet(&buffer[7], 3));
+	regmap_write(hdmi->regs, TOP_SPDIF_PKT02, mtk_hdmi_v2_format_hw_packet(&buffer[10], 4));
+	regmap_write(hdmi->regs, TOP_SPDIF_PKT03, mtk_hdmi_v2_format_hw_packet(&buffer[14], 3));
+	regmap_write(hdmi->regs, TOP_SPDIF_PKT04, mtk_hdmi_v2_format_hw_packet(&buffer[17], 4));
+	regmap_write(hdmi->regs, TOP_SPDIF_PKT05, mtk_hdmi_v2_format_hw_packet(&buffer[21], 3));
+	regmap_write(hdmi->regs, TOP_SPDIF_PKT06, mtk_hdmi_v2_format_hw_packet(&buffer[24], 4));
+	regmap_write(hdmi->regs, TOP_SPDIF_PKT07, buffer[28]);
+
+	regmap_set_bits(hdmi->regs, TOP_INFO_EN, SPD_EN_WR | SPD_EN);
+	regmap_set_bits(hdmi->regs, TOP_INFO_RPT, SPD_RPT_EN);
+}
+
+static void mtk_hdmi_v2_hw_write_vendor_infoframe(struct mtk_hdmi *hdmi, const u8 *buffer)
+{
+	regmap_clear_bits(hdmi->regs, TOP_INFO_EN, VSIF_EN_WR | VSIF_EN);
+	regmap_clear_bits(hdmi->regs, TOP_INFO_RPT, VSIF_RPT_EN);
+
+	regmap_write(hdmi->regs, TOP_VSIF_HEADER, mtk_hdmi_v2_format_hw_packet(&buffer[0], 3));
+	regmap_write(hdmi->regs, TOP_VSIF_PKT00, mtk_hdmi_v2_format_hw_packet(&buffer[3], 4));
+	regmap_write(hdmi->regs, TOP_VSIF_PKT01, mtk_hdmi_v2_format_hw_packet(&buffer[7], 2));
+	regmap_write(hdmi->regs, TOP_VSIF_PKT02, 0);
+	regmap_write(hdmi->regs, TOP_VSIF_PKT03, 0);
+	regmap_write(hdmi->regs, TOP_VSIF_PKT04, 0);
+	regmap_write(hdmi->regs, TOP_VSIF_PKT05, 0);
+	regmap_write(hdmi->regs, TOP_VSIF_PKT06, 0);
+	regmap_write(hdmi->regs, TOP_VSIF_PKT07, 0);
+
+	regmap_set_bits(hdmi->regs, TOP_INFO_EN, VSIF_EN_WR | VSIF_EN);
+	regmap_set_bits(hdmi->regs, TOP_INFO_RPT, VSIF_RPT_EN);
+}
+
+static void mtk_hdmi_yuv420_downsampling(struct mtk_hdmi *hdmi, bool enable)
+{
+	u32 val;
+
+	regmap_read(hdmi->regs, VID_DOWNSAMPLE_CONFIG, &val);
+
+	if (enable) {
+		regmap_set_bits(hdmi->regs, hdmi->conf->reg_hdmi_tx_cfg, HDMI_YUV420_MODE);
+
+		val |= C444_C422_CONFIG_ENABLE | C422_C420_CONFIG_ENABLE;
+		val |= C422_C420_CONFIG_OUT_CB_OR_CR;
+		val &= ~C422_C420_CONFIG_BYPASS;
+		regmap_write(hdmi->regs, VID_DOWNSAMPLE_CONFIG, val);
+
+		regmap_set_bits(hdmi->regs, VID_OUT_FORMAT, OUTPUT_FORMAT_DEMUX_420_ENABLE);
+	} else {
+		regmap_clear_bits(hdmi->regs, hdmi->conf->reg_hdmi_tx_cfg, HDMI_YUV420_MODE);
+
+		val &= ~(C444_C422_CONFIG_ENABLE | C422_C420_CONFIG_ENABLE);
+		val &= ~C422_C420_CONFIG_OUT_CB_OR_CR;
+		val |= C422_C420_CONFIG_BYPASS;
+		regmap_write(hdmi->regs, VID_DOWNSAMPLE_CONFIG, val);
+
+		regmap_clear_bits(hdmi->regs, VID_OUT_FORMAT, OUTPUT_FORMAT_DEMUX_420_ENABLE);
+	}
+}
+
+static int mtk_hdmi_v2_setup_audio_infoframe(struct mtk_hdmi *hdmi)
+{
+	struct hdmi_codec_params *params = &hdmi->aud_param.codec_params;
+	struct hdmi_audio_infoframe frame;
+	u8 buffer[14];
+	ssize_t ret;
+
+	memcpy(&frame, &params->cea, sizeof(frame));
+
+	ret = hdmi_audio_infoframe_pack(&frame, buffer, sizeof(buffer));
+	if (ret < 0)
+		return ret;
+
+	mtk_hdmi_v2_hw_write_audio_infoframe(hdmi, buffer);
+
+	return 0;
+}
+
+static inline void mtk_hdmi_v2_hw_gcp_avmute(struct mtk_hdmi *hdmi, bool mute)
+{
+	u32 val;
+
+	regmap_read(hdmi->regs, TOP_CFG01, &val);
+	val &= ~(CP_CLR_MUTE_EN | CP_SET_MUTE_EN);
+
+	if (mute) {
+		val |= CP_SET_MUTE_EN;
+		val &= ~CP_CLR_MUTE_EN;
+	} else {
+		val |= CP_CLR_MUTE_EN;
+		val &= ~CP_SET_MUTE_EN;
+	}
+	regmap_write(hdmi->regs, TOP_CFG01, val);
+
+	regmap_set_bits(hdmi->regs, TOP_INFO_RPT, CP_RPT_EN);
+	regmap_set_bits(hdmi->regs, TOP_INFO_EN, CP_EN | CP_EN_WR);
+}
+
+static void mtk_hdmi_v2_hw_ncts_enable(struct mtk_hdmi *hdmi, bool enable)
+{
+	if (enable)
+		regmap_set_bits(hdmi->regs, AIP_CTRL, CTS_SW_SEL);
+	else
+		regmap_clear_bits(hdmi->regs, AIP_CTRL, CTS_SW_SEL);
+}
+
+static void mtk_hdmi_v2_hw_aud_set_channel_status(struct mtk_hdmi *hdmi)
+{
+	u8 *ch_status = hdmi->aud_param.codec_params.iec.status;
+
+	/* Only the first 5 to 7 bytes of Channel Status contain useful information */
+	regmap_write(hdmi->regs, AIP_I2S_CHST0, mtk_hdmi_v2_format_hw_packet(&ch_status[0], 4));
+	regmap_write(hdmi->regs, AIP_I2S_CHST1, mtk_hdmi_v2_format_hw_packet(&ch_status[4], 3));
+}
+
+static void mtk_hdmi_v2_hw_aud_set_ncts(struct mtk_hdmi *hdmi,
+				     unsigned int sample_rate,
+				     unsigned int clock)
+{
+	unsigned int n, cts;
+
+	mtk_hdmi_get_ncts(sample_rate, clock, &n, &cts);
+
+	regmap_write(hdmi->regs, AIP_N_VAL, n);
+	regmap_write(hdmi->regs, AIP_CTS_SVAL, cts);
+}
+
+static void mtk_hdmi_v2_hw_aud_enable(struct mtk_hdmi *hdmi, bool enable)
+{
+	if (enable)
+		regmap_clear_bits(hdmi->regs, AIP_TXCTRL, AUD_PACKET_DROP);
+	else
+		regmap_set_bits(hdmi->regs, AIP_TXCTRL, AUD_PACKET_DROP);
+}
+
+static u32 mtk_hdmi_v2_aud_output_channel_map(u8 sd0, u8 sd1, u8 sd2, u8 sd3,
+					      u8 sd4, u8 sd5, u8 sd6, u8 sd7)
+{
+	u32 val;
+
+	/*
+	 * Each of the Output Channels (0-7) can be mapped to get their input
+	 * from any of the available Input Channels (0-7): this function
+	 * takes input channel numbers and formats a value that must then
+	 * be written to the TOP_AUD_MAP hardware register by the caller.
+	 */
+	val = FIELD_PREP(SD0_MAP, sd0) | FIELD_PREP(SD1_MAP, sd1);
+	val |= FIELD_PREP(SD2_MAP, sd2) | FIELD_PREP(SD3_MAP, sd3);
+	val |= FIELD_PREP(SD4_MAP, sd4) | FIELD_PREP(SD5_MAP, sd5);
+	val |= FIELD_PREP(SD6_MAP, sd6) | FIELD_PREP(SD7_MAP, sd7);
+
+	return val;
+}
+
+static void mtk_hdmi_audio_dsd_config(struct mtk_hdmi *hdmi,
+				      unsigned char chnum, bool dsd_bypass)
+{
+	u32 channel_map;
+
+	regmap_update_bits(hdmi->regs, AIP_CTRL, SPDIF_EN | DSD_EN | HBRA_ON, DSD_EN);
+	regmap_set_bits(hdmi->regs, AIP_TXCTRL, DSD_MUTE_EN);
+
+	if (dsd_bypass)
+		channel_map = mtk_hdmi_v2_aud_output_channel_map(0, 2, 4, 6, 1, 3, 5, 7);
+	else
+		channel_map = mtk_hdmi_v2_aud_output_channel_map(0, 5, 1, 0, 3, 2, 4, 0);
+
+	regmap_write(hdmi->regs, TOP_AUD_MAP, channel_map);
+	regmap_clear_bits(hdmi->regs, AIP_SPDIF_CTRL, I2S2DSD_EN);
+}
+
+static inline void mtk_hdmi_v2_hw_i2s_fifo_map(struct mtk_hdmi *hdmi, u32 fifo_mapping)
+{
+	regmap_update_bits(hdmi->regs, AIP_I2S_CTRL,
+			   FIFO0_MAP | FIFO1_MAP | FIFO2_MAP | FIFO3_MAP, fifo_mapping);
+}
+
+static inline void mtk_hdmi_v2_hw_i2s_ch_number(struct mtk_hdmi *hdmi, u8 chnum)
+{
+	regmap_update_bits(hdmi->regs, AIP_CTRL, I2S_EN, FIELD_PREP(I2S_EN, chnum));
+}
+
+static void mtk_hdmi_v2_hw_i2s_ch_mapping(struct mtk_hdmi *hdmi, u8 chnum, u8 mapping)
+{
+	u32 fifo_map;
+	u8 bdata;
+
+	switch (chnum) {
+	default:
+	case 2:
+		bdata = 0x1;
+		break;
+	case 3:
+		bdata = 0x3;
+		break;
+	case 6:
+		if (mapping == 0x0e) {
+			bdata = 0xf;
+			break;
+		}
+		fallthrough;
+	case 5:
+		bdata = 0x7;
+		break;
+	case 7:
+	case 8:
+		bdata = 0xf;
+		break;
+	}
+
+	/* Assign default FIFO mapping: SD0 to FIFO0, SD1 to FIFO1, etc. */
+	fifo_map = FIELD_PREP(FIFO0_MAP, 0) | FIELD_PREP(FIFO1_MAP, 1);
+	fifo_map |= FIELD_PREP(FIFO2_MAP, 2) | FIELD_PREP(FIFO3_MAP, 3);
+	mtk_hdmi_v2_hw_i2s_fifo_map(hdmi, fifo_map);
+	mtk_hdmi_v2_hw_i2s_ch_number(hdmi, bdata);
+
+	/*
+	 * Set HDMI Audio packet layout indicator:
+	 * Layout 0 is for two channels
+	 * Layout 1 is for up to eight channels
+	 */
+	if (chnum == 2)
+		regmap_set_bits(hdmi->regs, AIP_TXCTRL, AUD_LAYOUT_1);
+	else
+		regmap_clear_bits(hdmi->regs, AIP_TXCTRL, AUD_LAYOUT_1);
+}
+
+static void mtk_hdmi_i2s_data_fmt(struct mtk_hdmi *hdmi, unsigned char fmt)
+{
+	u32 val;
+
+	regmap_read(hdmi->regs, AIP_I2S_CTRL, &val);
+	val &= ~(WS_HIGH | I2S_1ST_BIT_NOSHIFT | JUSTIFY_RIGHT);
+
+	switch (fmt) {
+	case HDMI_I2S_MODE_RJT_24BIT:
+	case HDMI_I2S_MODE_RJT_16BIT:
+		val |= (WS_HIGH | I2S_1ST_BIT_NOSHIFT | JUSTIFY_RIGHT);
+		break;
+	case HDMI_I2S_MODE_LJT_24BIT:
+	case HDMI_I2S_MODE_LJT_16BIT:
+		val |= (WS_HIGH | I2S_1ST_BIT_NOSHIFT);
+		break;
+	case HDMI_I2S_MODE_I2S_24BIT:
+	case HDMI_I2S_MODE_I2S_16BIT:
+	default:
+		break;
+	}
+
+	regmap_write(hdmi->regs, AIP_I2S_CTRL, val);
+}
+
+static inline void mtk_hdmi_i2s_sck_edge_rise(struct mtk_hdmi *hdmi, bool rise)
+{
+	if (rise)
+		regmap_set_bits(hdmi->regs, AIP_I2S_CTRL, SCK_EDGE_RISE);
+	else
+		regmap_clear_bits(hdmi->regs, AIP_I2S_CTRL, SCK_EDGE_RISE);
+}
+
+static inline void mtk_hdmi_i2s_cbit_order(struct mtk_hdmi *hdmi, unsigned int cbit)
+{
+	regmap_update_bits(hdmi->regs, AIP_I2S_CTRL, CBIT_ORDER_SAME, cbit);
+}
+
+static inline void mtk_hdmi_i2s_vbit(struct mtk_hdmi *hdmi, unsigned int vbit)
+{
+	/* V bit: 0 for PCM, 1 for Compressed data */
+	regmap_update_bits(hdmi->regs, AIP_I2S_CTRL, VBIT_COMPRESSED, vbit);
+}
+
+static inline void mtk_hdmi_i2s_data_direction(struct mtk_hdmi *hdmi, unsigned int is_lsb)
+{
+	regmap_update_bits(hdmi->regs, AIP_I2S_CTRL, I2S_DATA_DIR_LSB, is_lsb);
+}
+
+static inline void mtk_hdmi_v2_hw_audio_type(struct mtk_hdmi *hdmi, unsigned int spdif_i2s)
+{
+	regmap_update_bits(hdmi->regs, AIP_CTRL, SPDIF_EN, FIELD_PREP(SPDIF_EN, spdif_i2s));
+}
+
+static u8 mtk_hdmi_v2_get_i2s_ch_mapping(struct mtk_hdmi *hdmi, u8 channel_type)
+{
+	switch (channel_type) {
+	case HDMI_AUD_CHAN_TYPE_1_1:
+	case HDMI_AUD_CHAN_TYPE_2_1:
+		return 0x01;
+	case HDMI_AUD_CHAN_TYPE_3_0:
+		return 0x02;
+	case HDMI_AUD_CHAN_TYPE_3_1:
+		return 0x03;
+	case HDMI_AUD_CHAN_TYPE_3_0_LRS:
+	case HDMI_AUD_CHAN_TYPE_4_0:
+		return 0x08;
+	case HDMI_AUD_CHAN_TYPE_5_1:
+		return 0x0b;
+	case HDMI_AUD_CHAN_TYPE_4_1_CLRS:
+	case HDMI_AUD_CHAN_TYPE_6_0:
+	case HDMI_AUD_CHAN_TYPE_6_0_CS:
+	case HDMI_AUD_CHAN_TYPE_6_0_CH:
+	case HDMI_AUD_CHAN_TYPE_6_0_OH:
+	case HDMI_AUD_CHAN_TYPE_6_0_CHR:
+		return 0x0e;
+	case HDMI_AUD_CHAN_TYPE_1_0:
+	case HDMI_AUD_CHAN_TYPE_2_0:
+	case HDMI_AUD_CHAN_TYPE_3_1_LRS:
+	case HDMI_AUD_CHAN_TYPE_4_1:
+	case HDMI_AUD_CHAN_TYPE_5_0:
+	case HDMI_AUD_CHAN_TYPE_4_0_CLRS:
+	case HDMI_AUD_CHAN_TYPE_6_1:
+	case HDMI_AUD_CHAN_TYPE_6_1_CS:
+	case HDMI_AUD_CHAN_TYPE_6_1_CH:
+	case HDMI_AUD_CHAN_TYPE_6_1_OH:
+	case HDMI_AUD_CHAN_TYPE_6_1_CHR:
+	case HDMI_AUD_CHAN_TYPE_7_0:
+	case HDMI_AUD_CHAN_TYPE_7_0_LH_RH:
+	case HDMI_AUD_CHAN_TYPE_7_0_LSR_RSR:
+	case HDMI_AUD_CHAN_TYPE_7_0_LC_RC:
+	case HDMI_AUD_CHAN_TYPE_7_0_LW_RW:
+	case HDMI_AUD_CHAN_TYPE_7_0_LSD_RSD:
+	case HDMI_AUD_CHAN_TYPE_7_0_LSS_RSS:
+	case HDMI_AUD_CHAN_TYPE_7_0_LHS_RHS:
+	case HDMI_AUD_CHAN_TYPE_7_0_CS_CH:
+	case HDMI_AUD_CHAN_TYPE_7_0_CS_OH:
+	case HDMI_AUD_CHAN_TYPE_7_0_CS_CHR:
+	case HDMI_AUD_CHAN_TYPE_7_0_CH_OH:
+	case HDMI_AUD_CHAN_TYPE_7_0_CH_CHR:
+	case HDMI_AUD_CHAN_TYPE_7_0_OH_CHR:
+	case HDMI_AUD_CHAN_TYPE_7_0_LSS_RSS_LSR_RSR:
+	case HDMI_AUD_CHAN_TYPE_8_0_LH_RH_CS:
+	case HDMI_AUD_CHAN_TYPE_7_1:
+	case HDMI_AUD_CHAN_TYPE_7_1_LH_RH:
+	case HDMI_AUD_CHAN_TYPE_7_1_LSR_RSR:
+	case HDMI_AUD_CHAN_TYPE_7_1_LC_RC:
+	case HDMI_AUD_CHAN_TYPE_7_1_LW_RW:
+	case HDMI_AUD_CHAN_TYPE_7_1_LSD_RSD:
+	case HDMI_AUD_CHAN_TYPE_7_1_LSS_RSS:
+	case HDMI_AUD_CHAN_TYPE_7_1_LHS_RHS:
+	case HDMI_AUD_CHAN_TYPE_7_1_CS_CH:
+	case HDMI_AUD_CHAN_TYPE_7_1_CS_OH:
+	case HDMI_AUD_CHAN_TYPE_7_1_CS_CHR:
+	case HDMI_AUD_CHAN_TYPE_7_1_CH_OH:
+	case HDMI_AUD_CHAN_TYPE_7_1_CH_CHR:
+	case HDMI_AUD_CHAN_TYPE_7_1_OH_CHR:
+	case HDMI_AUD_CHAN_TYPE_7_1_LSS_RSS_LSR_RSR:
+	default:
+		return 0;
+	}
+
+	return 0;
+}
+
+static inline void mtk_hdmi_v2_hw_i2s_ch_swap(struct mtk_hdmi *hdmi)
+{
+	regmap_update_bits(hdmi->regs, AIP_SPDIF_CTRL, MAX_2UI_I2S_HI_WRITE,
+			   FIELD_PREP(MAX_2UI_I2S_HI_WRITE, MAX_2UI_I2S_LFE_CC_SWAP));
+}
+
+static void mtk_hdmi_hbr_config(struct mtk_hdmi *hdmi, bool dsd_bypass)
+{
+	const u32 hbr_mask = SPDIF_EN | DSD_EN | HBRA_ON;
+
+	if (dsd_bypass) {
+		regmap_update_bits(hdmi->regs, AIP_CTRL, hbr_mask, HBRA_ON);
+		regmap_set_bits(hdmi->regs, AIP_CTRL, I2S_EN);
+	} else {
+		regmap_update_bits(hdmi->regs, AIP_CTRL, hbr_mask, SPDIF_EN);
+		regmap_set_bits(hdmi->regs, AIP_CTRL, SPDIF_INTERNAL_MODULE);
+		regmap_set_bits(hdmi->regs, AIP_CTRL, HBR_FROM_SPDIF);
+		regmap_set_bits(hdmi->regs, AIP_CTRL, CTS_CAL_N4);
+	}
+}
+
+static inline void mtk_hdmi_v2_hw_spdif_config(struct mtk_hdmi *hdmi)
+{
+	regmap_clear_bits(hdmi->regs, AIP_SPDIF_CTRL, WR_1UI_LOCK);
+	regmap_clear_bits(hdmi->regs, AIP_SPDIF_CTRL, FS_OVERRIDE_WRITE);
+	regmap_clear_bits(hdmi->regs, AIP_SPDIF_CTRL, WR_2UI_LOCK);
+
+	regmap_update_bits(hdmi->regs, AIP_SPDIF_CTRL, MAX_1UI_WRITE,
+			   FIELD_PREP(MAX_1UI_WRITE, 4));
+	regmap_update_bits(hdmi->regs, AIP_SPDIF_CTRL, MAX_2UI_SPDIF_WRITE,
+			   FIELD_PREP(MAX_2UI_SPDIF_WRITE, 9));
+	regmap_update_bits(hdmi->regs, AIP_SPDIF_CTRL, AUD_ERR_THRESH,
+			   FIELD_PREP(AUD_ERR_THRESH, 4));
+
+	regmap_set_bits(hdmi->regs, AIP_SPDIF_CTRL, I2S2DSD_EN);
+}
+
+static void mtk_hdmi_v2_aud_set_input(struct mtk_hdmi *hdmi)
+{
+	struct hdmi_audio_param *aud_param = &hdmi->aud_param;
+	struct hdmi_codec_params *codec_params = &aud_param->codec_params;
+	u8 i2s_ch_map;
+	u32 out_ch_map;
+
+	/* Write the default output channel map. CH0 maps to SD0, CH1 maps to SD1, etc */
+	out_ch_map = mtk_hdmi_v2_aud_output_channel_map(0, 1, 2, 3, 4, 5, 6, 7);
+	regmap_write(hdmi->regs, TOP_AUD_MAP, out_ch_map);
+
+	regmap_update_bits(hdmi->regs, AIP_SPDIF_CTRL, MAX_2UI_I2S_HI_WRITE, 0);
+	regmap_clear_bits(hdmi->regs, AIP_CTRL,
+			  SPDIF_EN | DSD_EN | HBRA_ON | CTS_CAL_N4 |
+			  HBR_FROM_SPDIF | SPDIF_INTERNAL_MODULE);
+	regmap_clear_bits(hdmi->regs, AIP_TXCTRL, DSD_MUTE_EN | AUD_LAYOUT_1);
+
+	if (aud_param->aud_input_type == HDMI_AUD_INPUT_I2S) {
+		switch (aud_param->aud_codec) {
+		case HDMI_AUDIO_CODING_TYPE_DTS_HD:
+		case HDMI_AUDIO_CODING_TYPE_MLP:
+			mtk_hdmi_i2s_data_fmt(hdmi, aud_param->aud_i2s_fmt);
+			mtk_hdmi_hbr_config(hdmi, true);
+			break;
+		case HDMI_AUDIO_CODING_TYPE_DSD:
+			mtk_hdmi_audio_dsd_config(hdmi, codec_params->channels, 0);
+			mtk_hdmi_v2_hw_i2s_ch_mapping(hdmi, codec_params->channels, 1);
+			break;
+		default:
+			mtk_hdmi_i2s_data_fmt(hdmi, aud_param->aud_i2s_fmt);
+			mtk_hdmi_i2s_sck_edge_rise(hdmi, true);
+			mtk_hdmi_i2s_cbit_order(hdmi, CBIT_ORDER_SAME);
+			mtk_hdmi_i2s_vbit(hdmi, 0); /* PCM data */
+			mtk_hdmi_i2s_data_direction(hdmi, 0); /* MSB first */
+			mtk_hdmi_v2_hw_audio_type(hdmi, HDMI_AUD_INPUT_I2S);
+			i2s_ch_map = mtk_hdmi_v2_get_i2s_ch_mapping(hdmi,
+						aud_param->aud_input_chan_type);
+			mtk_hdmi_v2_hw_i2s_ch_mapping(hdmi, codec_params->channels, i2s_ch_map);
+			mtk_hdmi_v2_hw_i2s_ch_swap(hdmi);
+		}
+	} else {
+		if (codec_params->sample_rate == 768000 &&
+		    (aud_param->aud_codec == HDMI_AUDIO_CODING_TYPE_DTS_HD ||
+		     aud_param->aud_codec == HDMI_AUDIO_CODING_TYPE_MLP)) {
+			mtk_hdmi_hbr_config(hdmi, false);
+		} else {
+			mtk_hdmi_v2_hw_spdif_config(hdmi);
+			mtk_hdmi_v2_hw_i2s_ch_mapping(hdmi, 2, 0);
+		}
+	}
+}
+
+static inline void mtk_hdmi_v2_hw_audio_input_enable(struct mtk_hdmi *hdmi, bool ena)
+{
+	if (ena)
+		regmap_set_bits(hdmi->regs, AIP_CTRL, AUD_IN_EN);
+	else
+		regmap_clear_bits(hdmi->regs, AIP_CTRL, AUD_IN_EN);
+}
+
+static void mtk_hdmi_v2_aip_ctrl_init(struct mtk_hdmi *hdmi)
+{
+	regmap_set_bits(hdmi->regs, AIP_CTRL,
+			AUD_SEL_OWRT | NO_MCLK_CTSGEN_SEL | MCLK_EN | CTS_REQ_EN);
+	regmap_clear_bits(hdmi->regs, AIP_TPI_CTRL, TPI_AUDIO_LOOKUP_EN);
+}
+
+static void mtk_hdmi_v2_audio_reset(struct mtk_hdmi *hdmi, bool reset)
+{
+	const u32 arst_bits = RST4AUDIO | RST4AUDIO_FIFO | RST4AUDIO_ACR;
+
+	if (reset)
+		regmap_set_bits(hdmi->regs, AIP_TXCTRL, arst_bits);
+	else
+		regmap_clear_bits(hdmi->regs, AIP_TXCTRL, arst_bits);
+}
+
+static void mtk_hdmi_v2_aud_output_config(struct mtk_hdmi *hdmi,
+					  struct drm_display_mode *display_mode)
+{
+	/* Shut down and reset the HDMI Audio HW to avoid glitching */
+	mtk_hdmi_v2_hw_aud_mute(hdmi, true);
+	mtk_hdmi_v2_hw_aud_enable(hdmi, false);
+	mtk_hdmi_v2_audio_reset(hdmi, true);
+
+	/* Configure the main hardware params and get out of reset */
+	mtk_hdmi_v2_aip_ctrl_init(hdmi);
+	mtk_hdmi_v2_aud_set_input(hdmi);
+	mtk_hdmi_v2_hw_aud_set_channel_status(hdmi);
+	mtk_hdmi_v2_setup_audio_infoframe(hdmi);
+	mtk_hdmi_v2_hw_audio_input_enable(hdmi, true);
+	mtk_hdmi_v2_audio_reset(hdmi, false);
+
+	/* Ignore N/CTS packet transmission requests and configure */
+	mtk_hdmi_v2_hw_ncts_enable(hdmi, false);
+	mtk_hdmi_v2_hw_aud_set_ncts(hdmi, hdmi->aud_param.codec_params.sample_rate,
+				    display_mode->clock);
+
+	/* Wait for the HW to apply settings */
+	usleep_range(25, 50);
+
+	/* Hardware is fully configured: enable TX of N/CTS pkts and unmute */
+	mtk_hdmi_v2_hw_ncts_enable(hdmi, true);
+	mtk_hdmi_v2_hw_aud_enable(hdmi, true);
+	mtk_hdmi_v2_hw_aud_mute(hdmi, false);
+}
+
+static void mtk_hdmi_v2_change_video_resolution(struct mtk_hdmi *hdmi,
+						struct drm_connector_state *conn_state)
+{
+	mtk_hdmi_v2_hw_reset(hdmi);
+	mtk_hdmi_v2_set_sw_hpd(hdmi, true);
+	udelay(2);
+
+	regmap_write(hdmi->regs, HDCP_TOP_CTRL, 0);
+
+	/*
+	 * Enable HDCP reauthentication interrupt: the HW uses this internally
+	 * for the HPD state machine even if HDCP encryption is not enabled.
+	 */
+	regmap_set_bits(hdmi->regs, TOP_INT_ENABLE00, HDCP2X_RX_REAUTH_REQ_DDCM_INT);
+
+	/* Enable hotplug and pord interrupts */
+	mtk_hdmi_v2_enable_hpd_pord_irq(hdmi, true);
+
+	/* Force enabling HDCP HPD */
+	regmap_set_bits(hdmi->regs, HDCP2X_CTRL_0, HDCP2X_HPD_OVR);
+	regmap_set_bits(hdmi->regs, HDCP2X_CTRL_0, HDCP2X_HPD_SW);
+
+	/* Set 8 bits per pixel */
+	regmap_update_bits(hdmi->regs, TOP_CFG00, TMDS_PACK_MODE,
+			   FIELD_PREP(TMDS_PACK_MODE, TMDS_PACK_MODE_8BPP));
+	/* Disable generating deepcolor packets */
+	regmap_clear_bits(hdmi->regs, TOP_CFG00, DEEPCOLOR_PKT_EN);
+	/* Disable adding deepcolor information to the general packet */
+	regmap_clear_bits(hdmi->regs, TOP_MISC_CTLR, DEEP_COLOR_ADD);
+
+	if (hdmi->curr_conn->display_info.is_hdmi)
+		regmap_set_bits(hdmi->regs, TOP_CFG00, HDMI_MODE_HDMI);
+	else
+		regmap_clear_bits(hdmi->regs, TOP_CFG00, HDMI_MODE_HDMI);
+
+	udelay(5);
+	mtk_hdmi_v2_hw_vid_mute(hdmi, true);
+	mtk_hdmi_v2_hw_aud_mute(hdmi, true);
+	mtk_hdmi_v2_hw_gcp_avmute(hdmi, false);
+
+	regmap_update_bits(hdmi->regs, TOP_CFG01,
+			   NULL_PKT_VSYNC_HIGH_EN | NULL_PKT_EN, NULL_PKT_VSYNC_HIGH_EN);
+	usleep_range(100, 150);
+
+	/* Enable scrambling if tmds clock is 340MHz or more */
+	mtk_hdmi_v2_enable_scrambling(hdmi, hdmi->mode.clock >= 340 * KILO);
+
+	switch (conn_state->hdmi.output_format) {
+	default:
+	case HDMI_COLORSPACE_RGB:
+	case HDMI_COLORSPACE_YUV444:
+		/* Disable YUV420 downsampling for RGB and YUV444 */
+		mtk_hdmi_yuv420_downsampling(hdmi, false);
+		break;
+	case HDMI_COLORSPACE_YUV422:
+		/*
+		 * YUV420 downsampling is special and needs a bit of setup
+		 * so we disable everything there before doing anything else.
+		 *
+		 * YUV422 downsampling instead just needs one bit to be set.
+		 */
+		mtk_hdmi_yuv420_downsampling(hdmi, false);
+		regmap_set_bits(hdmi->regs, VID_DOWNSAMPLE_CONFIG,
+				C444_C422_CONFIG_ENABLE);
+		break;
+	case HDMI_COLORSPACE_YUV420:
+		mtk_hdmi_yuv420_downsampling(hdmi, true);
+		break;
+	};
+}
+
+static void mtk_hdmi_v2_output_set_display_mode(struct mtk_hdmi *hdmi,
+						struct drm_connector_state *conn_state,
+						struct drm_display_mode *mode)
+{
+	union phy_configure_opts opts = {
+		.dp = { .link_rate = hdmi->mode.clock * KILO }
+	};
+	int ret;
+
+	ret = phy_configure(hdmi->phy, &opts);
+	if (ret)
+		dev_err(hdmi->dev, "Setting clock=%d failed: %d", mode->clock, ret);
+
+	mtk_hdmi_v2_change_video_resolution(hdmi, conn_state);
+	mtk_hdmi_v2_aud_output_config(hdmi, mode);
+}
+
+static int mtk_hdmi_v2_clk_enable(struct mtk_hdmi *hdmi)
+{
+	int ret;
+
+	ret = clk_prepare_enable(hdmi->clk[MTK_HDMI_V2_CLK_HDCP_SEL]);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(hdmi->clk[MTK_HDMI_V2_CLK_HDCP_24M_SEL]);
+	if (ret)
+		goto disable_hdcp_clk;
+
+	ret = clk_prepare_enable(hdmi->clk[MTK_HDMI_V2_CLK_HDMI_APB_SEL]);
+	if (ret)
+		goto disable_hdcp_24m_clk;
+
+	ret = clk_prepare_enable(hdmi->clk[MTK_HDMI_V2_CLK_VPP_SPLIT_HDMI]);
+	if (ret)
+		goto disable_bus_clk;
+
+	return 0;
+
+disable_bus_clk:
+	clk_disable_unprepare(hdmi->clk[MTK_HDMI_V2_CLK_HDMI_APB_SEL]);
+disable_hdcp_24m_clk:
+	clk_disable_unprepare(hdmi->clk[MTK_HDMI_V2_CLK_HDCP_24M_SEL]);
+disable_hdcp_clk:
+	clk_disable_unprepare(hdmi->clk[MTK_HDMI_V2_CLK_HDCP_SEL]);
+
+	return ret;
+}
+
+static void mtk_hdmi_v2_clk_disable(struct mtk_hdmi *hdmi)
+{
+	clk_disable_unprepare(hdmi->clk[MTK_HDMI_V2_CLK_VPP_SPLIT_HDMI]);
+	clk_disable_unprepare(hdmi->clk[MTK_HDMI_V2_CLK_HDMI_APB_SEL]);
+	clk_disable_unprepare(hdmi->clk[MTK_HDMI_V2_CLK_HDCP_24M_SEL]);
+	clk_disable_unprepare(hdmi->clk[MTK_HDMI_V2_CLK_HDCP_SEL]);
+}
+
+static enum hdmi_hpd_state mtk_hdmi_v2_hpd_pord_status(struct mtk_hdmi *hdmi)
+{
+	u8 hpd_pin_sta, pord_pin_sta;
+	u32 hpd_status;
+
+	regmap_read(hdmi->regs, HPD_DDC_STATUS, &hpd_status);
+	hpd_pin_sta = FIELD_GET(HPD_PIN_STA, hpd_status);
+	pord_pin_sta = FIELD_GET(PORD_PIN_STA, hpd_status);
+
+	/*
+	 * Inform that the cable is plugged in (hpd_pin_sta) so that the
+	 * sink can be powered on by switching the 5V VBUS as required by
+	 * the HDMI spec for reading EDID and for HDMI Audio registers to
+	 * be accessible.
+	 *
+	 * PORD detection succeeds only when the cable is plugged in and
+	 * the sink is powered on: reaching that state means that the
+	 * communication with the sink can be started.
+	 *
+	 * Please note that when the cable is plugged out the HPD pin will
+	 * be the first one to fall, while PORD may still be in rise state
+	 * for a few more milliseconds, so we decide HDMI_PLUG_OUT without
+	 * checking PORD at all (we check only HPD falling for that).
+	 */
+	if (hpd_pin_sta && pord_pin_sta)
+		return HDMI_PLUG_IN_AND_SINK_POWER_ON;
+	else if (hpd_pin_sta)
+		return HDMI_PLUG_IN_ONLY;
+	else
+		return HDMI_PLUG_OUT;
+}
+
+static irqreturn_t mtk_hdmi_v2_isr(int irq, void *arg)
+{
+	struct mtk_hdmi *hdmi = arg;
+	unsigned int irq_sta;
+	int ret = IRQ_HANDLED;
+
+	regmap_read(hdmi->regs, TOP_INT_STA00, &irq_sta);
+
+	/* Handle Hotplug Detection interrupts */
+	if (irq_sta & HPD_PORD_HWIRQS) {
+		/*
+		 * Disable the HPD/PORD IRQs now and until thread done to
+		 * avoid interrupt storm that could happen with bad cables
+		 */
+		mtk_hdmi_v2_enable_hpd_pord_irq(hdmi, false);
+		ret = IRQ_WAKE_THREAD;
+
+		/* Clear HPD/PORD irqs to avoid unwanted retriggering */
+		regmap_write(hdmi->regs, TOP_INT_CLR00, HPD_PORD_HWIRQS);
+		regmap_write(hdmi->regs, TOP_INT_CLR00, 0);
+	}
+
+	return ret;
+}
+
+static irqreturn_t __mtk_hdmi_v2_isr_thread(struct mtk_hdmi *hdmi)
+{
+	enum hdmi_hpd_state hpd;
+
+	hpd = mtk_hdmi_v2_hpd_pord_status(hdmi);
+	if (hpd != hdmi->hpd) {
+		struct drm_encoder *encoder = hdmi->bridge.encoder;
+
+		hdmi->hpd = hpd;
+
+		if (encoder && encoder->dev)
+			drm_helper_hpd_irq_event(hdmi->bridge.encoder->dev);
+	}
+
+	mtk_hdmi_v2_enable_hpd_pord_irq(hdmi, true);
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t mtk_hdmi_v2_isr_thread(int irq, void *arg)
+{
+	struct mtk_hdmi *hdmi = arg;
+
+	/*
+	 * Debounce HDMI monitor HPD status.
+	 * Empirical testing shows that 30ms is enough wait
+	 */
+	msleep(30);
+
+	return __mtk_hdmi_v2_isr_thread(hdmi);
+}
+
+static int mtk_hdmi_v2_enable(struct mtk_hdmi *hdmi)
+{
+	bool was_active = pm_runtime_active(hdmi->dev);
+	int ret;
+
+	ret = pm_runtime_resume_and_get(hdmi->dev);
+	if (ret) {
+		dev_err(hdmi->dev, "Cannot resume HDMI\n");
+		return ret;
+	}
+
+	ret = mtk_hdmi_v2_clk_enable(hdmi);
+	if (ret) {
+		pm_runtime_put(hdmi->dev);
+		return ret;
+	}
+
+	if (!was_active) {
+		mtk_hdmi_v2_hw_reset(hdmi);
+		mtk_hdmi_v2_set_sw_hpd(hdmi, true);
+	}
+
+	return 0;
+}
+
+static void mtk_hdmi_v2_disable(struct mtk_hdmi *hdmi)
+{
+	mtk_hdmi_v2_clk_disable(hdmi);
+	pm_runtime_put_sync(hdmi->dev);
+}
+
+/*
+ * Bridge callbacks
+ */
+
+static int mtk_hdmi_v2_bridge_attach(struct drm_bridge *bridge,
+				     struct drm_encoder *encoder,
+				     enum drm_bridge_attach_flags flags)
+{
+	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
+	int ret;
+
+	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
+		DRM_ERROR("The flag DRM_BRIDGE_ATTACH_NO_CONNECTOR must be supplied\n");
+		return -EINVAL;
+	}
+	if (hdmi->next_bridge) {
+		ret = drm_bridge_attach(encoder, hdmi->next_bridge, bridge, flags);
+		if (ret)
+			return ret;
+	}
+
+	ret = mtk_hdmi_v2_enable(hdmi);
+	if (ret)
+		return ret;
+
+	/* Enable Hotplug and Pord pins internal debouncing */
+	regmap_set_bits(hdmi->regs, HPD_DDC_CTRL,
+			HPD_DDC_HPD_DBNC_EN | HPD_DDC_PORD_DBNC_EN);
+
+	irq_clear_status_flags(hdmi->irq, IRQ_NOAUTOEN);
+	enable_irq(hdmi->irq);
+
+	/*
+	 * Check if any HDMI monitor was connected before probing this driver
+	 * and/or attaching the bridge, without debouncing: if so, we want to
+	 * notify the DRM so that we start outputting an image ASAP.
+	 * Note that calling the ISR thread function will also perform a HW
+	 * registers write that enables both the HPD and Pord interrupts.
+	 */
+	__mtk_hdmi_v2_isr_thread(hdmi);
+
+	mtk_hdmi_v2_disable(hdmi);
+
+	return 0;
+}
+
+static void mtk_hdmi_v2_bridge_detach(struct drm_bridge *bridge)
+{
+	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
+
+	WARN_ON(pm_runtime_active(hdmi->dev));
+
+	/* The controller is already powered off, just disable irq here */
+	disable_irq(hdmi->irq);
+}
+
+static void mtk_hdmi_v2_handle_plugged_change(struct mtk_hdmi *hdmi, bool plugged)
+{
+	mutex_lock(&hdmi->update_plugged_status_lock);
+	if (hdmi->plugged_cb && hdmi->codec_dev)
+		hdmi->plugged_cb(hdmi->codec_dev, plugged);
+	mutex_unlock(&hdmi->update_plugged_status_lock);
+}
+
+static void mtk_hdmi_v2_bridge_pre_enable(struct drm_bridge *bridge,
+					  struct drm_atomic_state *state)
+{
+	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
+	struct drm_connector_state *conn_state;
+	union phy_configure_opts opts = {
+		.dp = { .link_rate = hdmi->mode.clock * KILO }
+	};
+	int ret;
+
+	/* Power on the controller before trying to write to registers */
+	ret = mtk_hdmi_v2_enable(hdmi);
+	if (WARN_ON(ret))
+		return;
+
+	/* Retrieve the connector through the atomic state */
+	hdmi->curr_conn = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);
+
+	conn_state = drm_atomic_get_new_connector_state(state, hdmi->curr_conn);
+	if (WARN_ON(!conn_state))
+		return;
+
+	/*
+	 * Preconfigure the HDMI controller and the HDMI PHY at pre_enable
+	 * stage to make sure that this IP is ready and clocked before the
+	 * mtk_dpi gets powered on and before it enables the output.
+	 */
+	mtk_hdmi_v2_output_set_display_mode(hdmi, conn_state, &hdmi->mode);
+
+	/* Reconfigure phy clock link with appropriate rate */
+	phy_configure(hdmi->phy, &opts);
+
+	/* Power on the PHY here to make sure that DPI_HDMI is clocked */
+	phy_power_on(hdmi->phy);
+
+	hdmi->powered = true;
+}
+
+static void mtk_hdmi_v2_bridge_enable(struct drm_bridge *bridge,
+				      struct drm_atomic_state *state)
+{
+	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
+	int ret;
+
+	if (WARN_ON(!hdmi->powered))
+		return;
+
+	ret = drm_atomic_helper_connector_hdmi_update_infoframes(hdmi->curr_conn, state);
+	if (ret)
+		dev_err(hdmi->dev, "Could not update infoframes: %d\n", ret);
+
+	mtk_hdmi_v2_hw_vid_mute(hdmi, false);
+
+	/* signal the connect event to audio codec */
+	mtk_hdmi_v2_handle_plugged_change(hdmi, true);
+
+	hdmi->enabled = true;
+}
+
+static void mtk_hdmi_v2_bridge_disable(struct drm_bridge *bridge,
+				       struct drm_atomic_state *state)
+{
+	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
+
+	if (!hdmi->enabled)
+		return;
+
+	mtk_hdmi_v2_hw_gcp_avmute(hdmi, true);
+	msleep(50);
+	mtk_hdmi_v2_hw_vid_mute(hdmi, true);
+	mtk_hdmi_v2_hw_aud_mute(hdmi, true);
+	msleep(50);
+
+	hdmi->enabled = false;
+}
+
+static void mtk_hdmi_v2_bridge_post_disable(struct drm_bridge *bridge,
+					    struct drm_atomic_state *state)
+{
+	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
+
+	if (!hdmi->powered)
+		return;
+
+	phy_power_off(hdmi->phy);
+	hdmi->powered = false;
+
+	/* signal the disconnect event to audio codec */
+	mtk_hdmi_v2_handle_plugged_change(hdmi, false);
+
+	/* Power off */
+	mtk_hdmi_v2_disable(hdmi);
+}
+
+static enum drm_connector_status mtk_hdmi_v2_bridge_detect(struct drm_bridge *bridge,
+							   struct drm_connector *connector)
+{
+	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
+
+	return hdmi->hpd != HDMI_PLUG_OUT ?
+	       connector_status_connected : connector_status_disconnected;
+}
+
+static const struct drm_edid *mtk_hdmi_v2_bridge_edid_read(struct drm_bridge *bridge,
+							   struct drm_connector *connector)
+{
+	return drm_edid_read(connector);
+}
+
+static void mtk_hdmi_v2_hpd_enable(struct drm_bridge *bridge)
+{
+	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
+	int ret;
+
+	ret = mtk_hdmi_v2_enable(hdmi);
+	if (ret) {
+		dev_err(hdmi->dev, "Cannot power on controller for HPD: %d\n", ret);
+		return;
+	}
+
+	mtk_hdmi_v2_enable_hpd_pord_irq(hdmi, true);
+}
+
+static void mtk_hdmi_v2_hpd_disable(struct drm_bridge *bridge)
+{
+	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
+
+	mtk_hdmi_v2_enable_hpd_pord_irq(hdmi, false);
+	mtk_hdmi_v2_disable(hdmi);
+}
+
+static int mtk_hdmi_v2_hdmi_tmds_char_rate_valid(const struct drm_bridge *bridge,
+						 const struct drm_display_mode *mode,
+						 unsigned long long tmds_rate)
+{
+	if (mode->clock < MTK_HDMI_V2_CLOCK_MIN)
+		return MODE_CLOCK_LOW;
+	else if (mode->clock > MTK_HDMI_V2_CLOCK_MAX)
+		return MODE_CLOCK_HIGH;
+	else
+		return MODE_OK;
+}
+
+static int mtk_hdmi_v2_hdmi_clear_infoframe(struct drm_bridge *bridge,
+					    enum hdmi_infoframe_type type)
+{
+	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
+
+	switch (type) {
+	case HDMI_INFOFRAME_TYPE_AUDIO:
+		regmap_clear_bits(hdmi->regs, TOP_INFO_EN, AUD_EN_WR | AUD_EN);
+		regmap_clear_bits(hdmi->regs, TOP_INFO_RPT, AUD_RPT_EN);
+		break;
+	case HDMI_INFOFRAME_TYPE_AVI:
+		regmap_clear_bits(hdmi->regs, TOP_INFO_EN, AVI_EN_WR | AVI_EN);
+		regmap_clear_bits(hdmi->regs, TOP_INFO_RPT, AVI_RPT_EN);
+		break;
+	case HDMI_INFOFRAME_TYPE_SPD:
+		regmap_clear_bits(hdmi->regs, TOP_INFO_EN, SPD_EN_WR | SPD_EN);
+		regmap_clear_bits(hdmi->regs, TOP_INFO_RPT, SPD_RPT_EN);
+		break;
+	case HDMI_INFOFRAME_TYPE_VENDOR:
+		regmap_clear_bits(hdmi->regs, TOP_INFO_EN, VSIF_EN_WR | VSIF_EN);
+		regmap_clear_bits(hdmi->regs, TOP_INFO_RPT, VSIF_RPT_EN);
+		break;
+	case HDMI_INFOFRAME_TYPE_DRM:
+	default:
+		break;
+	};
+
+	return 0;
+}
+
+static int mtk_hdmi_v2_hdmi_write_infoframe(struct drm_bridge *bridge,
+					    enum hdmi_infoframe_type type,
+					    const u8 *buffer, size_t len)
+{
+	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
+
+	switch (type) {
+	case HDMI_INFOFRAME_TYPE_AUDIO:
+		mtk_hdmi_v2_hw_write_audio_infoframe(hdmi, buffer);
+		break;
+	case HDMI_INFOFRAME_TYPE_AVI:
+		mtk_hdmi_v2_hw_write_avi_infoframe(hdmi, buffer);
+		break;
+	case HDMI_INFOFRAME_TYPE_SPD:
+		mtk_hdmi_v2_hw_write_spd_infoframe(hdmi, buffer);
+		break;
+	case HDMI_INFOFRAME_TYPE_VENDOR:
+		mtk_hdmi_v2_hw_write_vendor_infoframe(hdmi, buffer);
+		break;
+	case HDMI_INFOFRAME_TYPE_DRM:
+	default:
+		dev_err(hdmi->dev, "Unsupported HDMI infoframe type %u\n", type);
+		break;
+	};
+
+	return 0;
+}
+
+static int mtk_hdmi_v2_set_abist(struct mtk_hdmi *hdmi, bool enable)
+{
+	struct drm_display_mode *mode = &hdmi->mode;
+	int abist_format = -EINVAL;
+	bool interlaced;
+
+	if (!enable) {
+		regmap_clear_bits(hdmi->regs, TOP_CFG00, HDMI_ABIST_ENABLE);
+		return 0;
+	}
+
+	if (!mode->hdisplay || !mode->vdisplay)
+		return -EINVAL;
+
+	interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE;
+
+	switch (mode->hdisplay) {
+	case 720:
+		if (mode->vdisplay == 480)
+			abist_format = 2;
+		else if (mode->vdisplay == 576)
+			abist_format = 11;
+		break;
+	case 1280:
+		if (mode->vdisplay == 720)
+			abist_format = 3;
+		break;
+	case 1440:
+		if (mode->vdisplay == 480)
+			abist_format = interlaced ? 5 : 9;
+		else if (mode->vdisplay == 576)
+			abist_format = interlaced ? 14 : 18;
+		break;
+	case 1920:
+		if (mode->vdisplay == 1080)
+			abist_format = interlaced ? 4 : 10;
+		break;
+	case 3840:
+		if (mode->vdisplay == 2160)
+			abist_format = 25;
+		break;
+	case 4096:
+		if (mode->vdisplay == 2160)
+			abist_format = 26;
+		break;
+	default:
+		break;
+	}
+	if (abist_format < 0)
+		return abist_format;
+
+	regmap_update_bits(hdmi->regs, TOP_CFG00, HDMI_ABIST_VIDEO_FORMAT,
+			   FIELD_PREP(HDMI_ABIST_VIDEO_FORMAT, abist_format));
+	regmap_set_bits(hdmi->regs, TOP_CFG00, HDMI_ABIST_ENABLE);
+	return 0;
+}
+
+static int mtk_hdmi_v2_debug_abist_show(struct seq_file *m, void *arg)
+{
+	struct mtk_hdmi *hdmi = m->private;
+	bool en;
+	u32 val;
+	int ret;
+
+	if (!hdmi)
+		return -EINVAL;
+
+	ret = regmap_read(hdmi->regs, TOP_CFG00, &val);
+	if (ret)
+		return ret;
+
+	en = FIELD_GET(HDMI_ABIST_ENABLE, val);
+
+	seq_printf(m, "HDMI Automated Built-In Self Test: %s\n",
+		   en ? "Enabled" : "Disabled");
+
+	return 0;
+}
+
+static ssize_t mtk_hdmi_v2_debug_abist_write(struct file *file,
+					     const char __user *ubuf,
+					     size_t len, loff_t *offp)
+{
+	struct seq_file *m = file->private_data;
+	int ret;
+	u32 en;
+
+	if (!m || !m->private || *offp)
+		return -EINVAL;
+
+	ret = kstrtouint_from_user(ubuf, len, 0, &en);
+	if (ret)
+		return ret;
+
+	if (en < 0 || en > 1)
+		return -EINVAL;
+
+	mtk_hdmi_v2_set_abist((struct mtk_hdmi *)m->private, en);
+	return len;
+}
+
+static int mtk_hdmi_v2_debug_abist_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, mtk_hdmi_v2_debug_abist_show, inode->i_private);
+}
+
+static const struct file_operations mtk_hdmi_debug_abist_fops = {
+	.owner = THIS_MODULE,
+	.open = mtk_hdmi_v2_debug_abist_open,
+	.read = seq_read,
+	.write = mtk_hdmi_v2_debug_abist_write,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+static void mtk_hdmi_v2_debugfs_init(struct drm_bridge *bridge, struct dentry *root)
+{
+	struct mtk_hdmi *dpi = hdmi_ctx_from_bridge(bridge);
+
+	debugfs_create_file("hdmi_abist", 0640, root, dpi, &mtk_hdmi_debug_abist_fops);
+}
+
+static const struct drm_bridge_funcs mtk_v2_hdmi_bridge_funcs = {
+	.attach = mtk_hdmi_v2_bridge_attach,
+	.detach = mtk_hdmi_v2_bridge_detach,
+	.mode_fixup = mtk_hdmi_bridge_mode_fixup,
+	.mode_set = mtk_hdmi_bridge_mode_set,
+	.atomic_pre_enable = mtk_hdmi_v2_bridge_pre_enable,
+	.atomic_enable = mtk_hdmi_v2_bridge_enable,
+	.atomic_disable = mtk_hdmi_v2_bridge_disable,
+	.atomic_post_disable = mtk_hdmi_v2_bridge_post_disable,
+	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+	.atomic_reset = drm_atomic_helper_bridge_reset,
+	.detect = mtk_hdmi_v2_bridge_detect,
+	.edid_read = mtk_hdmi_v2_bridge_edid_read,
+	.hpd_enable = mtk_hdmi_v2_hpd_enable,
+	.hpd_disable = mtk_hdmi_v2_hpd_disable,
+	.hdmi_tmds_char_rate_valid = mtk_hdmi_v2_hdmi_tmds_char_rate_valid,
+	.hdmi_clear_infoframe = mtk_hdmi_v2_hdmi_clear_infoframe,
+	.hdmi_write_infoframe = mtk_hdmi_v2_hdmi_write_infoframe,
+	.debugfs_init = mtk_hdmi_v2_debugfs_init,
+};
+
+/*
+ * HDMI audio codec callbacks
+ */
+static int mtk_hdmi_v2_audio_hook_plugged_cb(struct device *dev, void *data,
+					     hdmi_codec_plugged_cb fn,
+					     struct device *codec_dev)
+{
+	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
+	bool plugged;
+
+	if (!hdmi)
+		return -ENODEV;
+
+	mtk_hdmi_audio_set_plugged_cb(hdmi, fn, codec_dev);
+	plugged = (hdmi->hpd == HDMI_PLUG_IN_AND_SINK_POWER_ON);
+	mtk_hdmi_v2_handle_plugged_change(hdmi, plugged);
+
+	return 0;
+}
+
+static int mtk_hdmi_v2_audio_hw_params(struct device *dev, void *data,
+				       struct hdmi_codec_daifmt *daifmt,
+				       struct hdmi_codec_params *params)
+{
+	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
+
+	if (hdmi->audio_enable) {
+		mtk_hdmi_audio_params(hdmi, daifmt, params);
+		mtk_hdmi_v2_aud_output_config(hdmi, &hdmi->mode);
+	}
+	return 0;
+}
+
+static int mtk_hdmi_v2_audio_startup(struct device *dev, void *data)
+{
+	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
+
+	mtk_hdmi_v2_hw_aud_enable(hdmi, true);
+	hdmi->audio_enable = true;
+
+	return 0;
+}
+
+static void mtk_hdmi_v2_audio_shutdown(struct device *dev, void *data)
+{
+	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
+
+	hdmi->audio_enable = false;
+	mtk_hdmi_v2_hw_aud_enable(hdmi, false);
+}
+
+static int mtk_hdmi_v2_audio_mute(struct device *dev, void *data, bool enable, int dir)
+{
+	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
+
+	mtk_hdmi_v2_hw_aud_mute(hdmi, enable);
+
+	return 0;
+}
+
+static const struct hdmi_codec_ops mtk_hdmi_v2_audio_codec_ops = {
+	.hw_params = mtk_hdmi_v2_audio_hw_params,
+	.audio_startup = mtk_hdmi_v2_audio_startup,
+	.audio_shutdown = mtk_hdmi_v2_audio_shutdown,
+	.mute_stream = mtk_hdmi_v2_audio_mute,
+	.get_eld = mtk_hdmi_audio_get_eld,
+	.hook_plugged_cb = mtk_hdmi_v2_audio_hook_plugged_cb,
+};
+
+static __maybe_unused int mtk_hdmi_v2_suspend(struct device *dev)
+{
+	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
+
+	mtk_hdmi_v2_disable(hdmi);
+
+	return 0;
+}
+
+static __maybe_unused int mtk_hdmi_v2_resume(struct device *dev)
+{
+	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
+
+	return mtk_hdmi_v2_enable(hdmi);
+}
+
+static SIMPLE_DEV_PM_OPS(mtk_hdmi_v2_pm_ops, mtk_hdmi_v2_suspend, mtk_hdmi_v2_resume);
+
+static const struct mtk_hdmi_ver_conf mtk_hdmi_conf_v2 = {
+	.bridge_funcs = &mtk_v2_hdmi_bridge_funcs,
+	.codec_ops = &mtk_hdmi_v2_audio_codec_ops,
+	.mtk_hdmi_clock_names = mtk_hdmi_v2_clk_names,
+	.num_clocks = MTK_HDMI_V2_CLK_COUNT,
+	.interlace_allowed = true,
+};
+
+static const struct mtk_hdmi_conf mtk_hdmi_conf_mt8188 = {
+	.ver_conf = &mtk_hdmi_conf_v2,
+	.reg_hdmi_tx_cfg = HDMITX_CONFIG_MT8188
+};
+
+static const struct mtk_hdmi_conf mtk_hdmi_conf_mt8195 = {
+	.ver_conf = &mtk_hdmi_conf_v2,
+	.reg_hdmi_tx_cfg = HDMITX_CONFIG_MT8195
+};
+
+static int mtk_hdmi_v2_probe(struct platform_device *pdev)
+{
+	struct mtk_hdmi *hdmi;
+	int ret;
+
+	/* Populate HDMI sub-devices if present */
+	ret = devm_of_platform_populate(&pdev->dev);
+	if (ret)
+		return ret;
+
+	hdmi = mtk_hdmi_common_probe(pdev);
+	if (IS_ERR(hdmi))
+		return PTR_ERR(hdmi);
+
+	hdmi->hpd = HDMI_PLUG_OUT;
+
+	/* Disable all HW interrupts at probe stage */
+	mtk_hdmi_v2_hwirq_disable(hdmi);
+
+	/*
+	 * In case bootloader leaves HDMI enabled before booting, make
+	 * sure that any interrupt that was left is cleared by setting
+	 * all bits in the INT_CLR registers for all 32+19 interrupts.
+	 */
+	regmap_write(hdmi->regs, TOP_INT_CLR00, GENMASK(31, 0));
+	regmap_write(hdmi->regs, TOP_INT_CLR01, GENMASK(18, 0));
+
+	/* Restore interrupt clearing registers to zero */
+	regmap_write(hdmi->regs, TOP_INT_CLR00, 0);
+	regmap_write(hdmi->regs, TOP_INT_CLR01, 0);
+
+	/*
+	 * Install the ISR but keep it disabled: as the interrupts are
+	 * being set up in the .bridge_attach() callback which will
+	 * enable both the right HW IRQs and the ISR.
+	 */
+	irq_set_status_flags(hdmi->irq, IRQ_NOAUTOEN);
+	ret = devm_request_threaded_irq(&pdev->dev, hdmi->irq, mtk_hdmi_v2_isr,
+					mtk_hdmi_v2_isr_thread,
+					IRQ_TYPE_LEVEL_HIGH,
+					dev_name(&pdev->dev), hdmi);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "Cannot request IRQ\n");
+
+	ret = devm_pm_runtime_enable(&pdev->dev);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "Cannot enable Runtime PM\n");
+
+	return 0;
+}
+
+static void mtk_hdmi_v2_remove(struct platform_device *pdev)
+{
+	struct mtk_hdmi *hdmi = platform_get_drvdata(pdev);
+
+	i2c_put_adapter(hdmi->ddc_adpt);
+}
+
+static const struct of_device_id mtk_drm_hdmi_v2_of_ids[] = {
+	{ .compatible = "mediatek,mt8188-hdmi-tx", .data = &mtk_hdmi_conf_mt8188 },
+	{ .compatible = "mediatek,mt8195-hdmi-tx", .data = &mtk_hdmi_conf_mt8195 },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mtk_drm_hdmi_v2_of_ids);
+
+static struct platform_driver mtk_hdmi_v2_driver = {
+	.probe = mtk_hdmi_v2_probe,
+	.remove = mtk_hdmi_v2_remove,
+	.driver = {
+		.name = "mediatek-drm-hdmi-v2",
+		.of_match_table = mtk_drm_hdmi_v2_of_ids,
+		.pm = &mtk_hdmi_v2_pm_ops,
+	},
+};
+module_platform_driver(mtk_hdmi_v2_driver);
+
+MODULE_AUTHOR("AngeloGioacchino Del Regno <[e-mail]>>");
+MODULE_DESCRIPTION("MediaTek HDMIv2 Driver");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS("DRM_MTK_HDMI");