tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
3 *
4 * derived from imx-hdmi.c(renamed to bridge/dw_hdmi.c now)
5 */
6
7#include <linux/component.h>
8#include <linux/mfd/syscon.h>
9#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
10#include <linux/module.h>
11#include <linux/platform_device.h>
12#include <linux/regmap.h>
13
14#include <video/imx-ipu-v3.h>
15
16#include <drm/bridge/dw_hdmi.h>
17#include <drm/drm_atomic_helper.h>
18#include <drm/drm_edid.h>
19#include <drm/drm_encoder.h>
20#include <drm/drm_of.h>
21
22#include "imx-drm.h"
23
24struct imx_hdmi {
25 struct device *dev;
26 struct drm_encoder encoder;
27 struct dw_hdmi *hdmi;
28 struct regmap *regmap;
29};
30
31static inline struct imx_hdmi *enc_to_imx_hdmi(struct drm_encoder *e)
32{
33 return container_of(e, struct imx_hdmi, encoder);
34}
35
36static const struct dw_hdmi_mpll_config imx_mpll_cfg[] = {
37 {
38 45250000, {
39 { 0x01e0, 0x0000 },
40 { 0x21e1, 0x0000 },
41 { 0x41e2, 0x0000 }
42 },
43 }, {
44 92500000, {
45 { 0x0140, 0x0005 },
46 { 0x2141, 0x0005 },
47 { 0x4142, 0x0005 },
48 },
49 }, {
50 148500000, {
51 { 0x00a0, 0x000a },
52 { 0x20a1, 0x000a },
53 { 0x40a2, 0x000a },
54 },
55 }, {
56 216000000, {
57 { 0x00a0, 0x000a },
58 { 0x2001, 0x000f },
59 { 0x4002, 0x000f },
60 },
61 }, {
62 ~0UL, {
63 { 0x0000, 0x0000 },
64 { 0x0000, 0x0000 },
65 { 0x0000, 0x0000 },
66 },
67 }
68};
69
70static const struct dw_hdmi_curr_ctrl imx_cur_ctr[] = {
71 /* pixelclk bpp8 bpp10 bpp12 */
72 {
73 54000000, { 0x091c, 0x091c, 0x06dc },
74 }, {
75 58400000, { 0x091c, 0x06dc, 0x06dc },
76 }, {
77 72000000, { 0x06dc, 0x06dc, 0x091c },
78 }, {
79 74250000, { 0x06dc, 0x0b5c, 0x091c },
80 }, {
81 118800000, { 0x091c, 0x091c, 0x06dc },
82 }, {
83 216000000, { 0x06dc, 0x0b5c, 0x091c },
84 }, {
85 ~0UL, { 0x0000, 0x0000, 0x0000 },
86 },
87};
88
89/*
90 * Resistance term 133Ohm Cfg
91 * PREEMP config 0.00
92 * TX/CK level 10
93 */
94static const struct dw_hdmi_phy_config imx_phy_config[] = {
95 /*pixelclk symbol term vlev */
96 { 216000000, 0x800d, 0x0005, 0x01ad},
97 { ~0UL, 0x0000, 0x0000, 0x0000}
98};
99
100static int dw_hdmi_imx_parse_dt(struct imx_hdmi *hdmi)
101{
102 struct device_node *np = hdmi->dev->of_node;
103
104 hdmi->regmap = syscon_regmap_lookup_by_phandle(np, "gpr");
105 if (IS_ERR(hdmi->regmap)) {
106 dev_err(hdmi->dev, "Unable to get gpr\n");
107 return PTR_ERR(hdmi->regmap);
108 }
109
110 return 0;
111}
112
113static void dw_hdmi_imx_encoder_disable(struct drm_encoder *encoder)
114{
115}
116
117static void dw_hdmi_imx_encoder_enable(struct drm_encoder *encoder)
118{
119 struct imx_hdmi *hdmi = enc_to_imx_hdmi(encoder);
120 int mux = drm_of_encoder_active_port_id(hdmi->dev->of_node, encoder);
121
122 regmap_update_bits(hdmi->regmap, IOMUXC_GPR3,
123 IMX6Q_GPR3_HDMI_MUX_CTL_MASK,
124 mux << IMX6Q_GPR3_HDMI_MUX_CTL_SHIFT);
125}
126
127static int dw_hdmi_imx_atomic_check(struct drm_encoder *encoder,
128 struct drm_crtc_state *crtc_state,
129 struct drm_connector_state *conn_state)
130{
131 struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state);
132
133 imx_crtc_state->bus_format = MEDIA_BUS_FMT_RGB888_1X24;
134 imx_crtc_state->di_hsync_pin = 2;
135 imx_crtc_state->di_vsync_pin = 3;
136
137 return 0;
138}
139
140static const struct drm_encoder_helper_funcs dw_hdmi_imx_encoder_helper_funcs = {
141 .enable = dw_hdmi_imx_encoder_enable,
142 .disable = dw_hdmi_imx_encoder_disable,
143 .atomic_check = dw_hdmi_imx_atomic_check,
144};
145
146static const struct drm_encoder_funcs dw_hdmi_imx_encoder_funcs = {
147 .destroy = drm_encoder_cleanup,
148};
149
150static enum drm_mode_status
151imx6q_hdmi_mode_valid(struct drm_connector *con,
152 const struct drm_display_mode *mode)
153{
154 if (mode->clock < 13500)
155 return MODE_CLOCK_LOW;
156 /* FIXME: Hardware is capable of 266MHz, but setup data is missing. */
157 if (mode->clock > 216000)
158 return MODE_CLOCK_HIGH;
159
160 return MODE_OK;
161}
162
163static enum drm_mode_status
164imx6dl_hdmi_mode_valid(struct drm_connector *con,
165 const struct drm_display_mode *mode)
166{
167 if (mode->clock < 13500)
168 return MODE_CLOCK_LOW;
169 /* FIXME: Hardware is capable of 270MHz, but setup data is missing. */
170 if (mode->clock > 216000)
171 return MODE_CLOCK_HIGH;
172
173 return MODE_OK;
174}
175
176static struct dw_hdmi_plat_data imx6q_hdmi_drv_data = {
177 .mpll_cfg = imx_mpll_cfg,
178 .cur_ctr = imx_cur_ctr,
179 .phy_config = imx_phy_config,
180 .mode_valid = imx6q_hdmi_mode_valid,
181};
182
183static struct dw_hdmi_plat_data imx6dl_hdmi_drv_data = {
184 .mpll_cfg = imx_mpll_cfg,
185 .cur_ctr = imx_cur_ctr,
186 .phy_config = imx_phy_config,
187 .mode_valid = imx6dl_hdmi_mode_valid,
188};
189
190static const struct of_device_id dw_hdmi_imx_dt_ids[] = {
191 { .compatible = "fsl,imx6q-hdmi",
192 .data = &imx6q_hdmi_drv_data
193 }, {
194 .compatible = "fsl,imx6dl-hdmi",
195 .data = &imx6dl_hdmi_drv_data
196 },
197 {},
198};
199MODULE_DEVICE_TABLE(of, dw_hdmi_imx_dt_ids);
200
201static int dw_hdmi_imx_bind(struct device *dev, struct device *master,
202 void *data)
203{
204 struct platform_device *pdev = to_platform_device(dev);
205 const struct dw_hdmi_plat_data *plat_data;
206 const struct of_device_id *match;
207 struct drm_device *drm = data;
208 struct drm_encoder *encoder;
209 struct imx_hdmi *hdmi;
210 int ret;
211
212 if (!pdev->dev.of_node)
213 return -ENODEV;
214
215 hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
216 if (!hdmi)
217 return -ENOMEM;
218
219 match = of_match_node(dw_hdmi_imx_dt_ids, pdev->dev.of_node);
220 plat_data = match->data;
221 hdmi->dev = &pdev->dev;
222 encoder = &hdmi->encoder;
223
224 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
225 /*
226 * If we failed to find the CRTC(s) which this encoder is
227 * supposed to be connected to, it's because the CRTC has
228 * not been registered yet. Defer probing, and hope that
229 * the required CRTC is added later.
230 */
231 if (encoder->possible_crtcs == 0)
232 return -EPROBE_DEFER;
233
234 ret = dw_hdmi_imx_parse_dt(hdmi);
235 if (ret < 0)
236 return ret;
237
238 drm_encoder_helper_add(encoder, &dw_hdmi_imx_encoder_helper_funcs);
239 drm_encoder_init(drm, encoder, &dw_hdmi_imx_encoder_funcs,
240 DRM_MODE_ENCODER_TMDS, NULL);
241
242 platform_set_drvdata(pdev, hdmi);
243
244 hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data);
245
246 /*
247 * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
248 * which would have called the encoder cleanup. Do it manually.
249 */
250 if (IS_ERR(hdmi->hdmi)) {
251 ret = PTR_ERR(hdmi->hdmi);
252 drm_encoder_cleanup(encoder);
253 }
254
255 return ret;
256}
257
258static void dw_hdmi_imx_unbind(struct device *dev, struct device *master,
259 void *data)
260{
261 struct imx_hdmi *hdmi = dev_get_drvdata(dev);
262
263 dw_hdmi_unbind(hdmi->hdmi);
264}
265
266static const struct component_ops dw_hdmi_imx_ops = {
267 .bind = dw_hdmi_imx_bind,
268 .unbind = dw_hdmi_imx_unbind,
269};
270
271static int dw_hdmi_imx_probe(struct platform_device *pdev)
272{
273 return component_add(&pdev->dev, &dw_hdmi_imx_ops);
274}
275
276static int dw_hdmi_imx_remove(struct platform_device *pdev)
277{
278 component_del(&pdev->dev, &dw_hdmi_imx_ops);
279
280 return 0;
281}
282
283static struct platform_driver dw_hdmi_imx_platform_driver = {
284 .probe = dw_hdmi_imx_probe,
285 .remove = dw_hdmi_imx_remove,
286 .driver = {
287 .name = "dwhdmi-imx",
288 .of_match_table = dw_hdmi_imx_dt_ids,
289 },
290};
291
292module_platform_driver(dw_hdmi_imx_platform_driver);
293
294MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>");
295MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
296MODULE_DESCRIPTION("IMX6 Specific DW-HDMI Driver Extension");
297MODULE_LICENSE("GPL");
298MODULE_ALIAS("platform:dwhdmi-imx");