Merge tag 'exynos-drm-next-for-v6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-next

New feature
- Add glue layer support for Exynos7870 DSIM in Exynos DSI driver
. Introduces Exynos7870 DSIM bridge integration at Exynos DRM DSI layer.

Bug fixups for exynos7_drm_decon.c module
- Remove redundant ctx->suspended state handling
. Cleans up unused state check logic as call flow is now correctly managed.
. Fixes an issue where decon_commit() was blocked from decon_atomic_enable() due to incorrect state setting.

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

From: Inki Dae <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

Documentation/devicetree/bindings/display/samsung/samsung,exynos7-decon.yaml

···
       - const: vsync
       - const: lcd_sys
 
+  iommus:
+    maxItems: 1
+
+  memory-region:
+    maxItems: 1
+    description:
+      A phandle to a node describing a reserved framebuffer memory region.
+      For example, the splash memory region set up by the bootloader.
+
+  port:
+    $ref: /schemas/graph.yaml#/properties/port
+    description:
+      Output port which is connected to either a Mobile Image Compressor
+      (MIC) or a DSI Master device.
+
   power-domains:
     maxItems: 1
 
···
   - clock-names
   - interrupts
   - interrupt-names
+  - port
   - reg
 
 additionalProperties: false
···
                       "decon0_vclk";
         pinctrl-0 = <&lcd_clk &pwm1_out>;
         pinctrl-names = "default";
+        port {
+            decon_to_dsi: endpoint {
+                remote-endpoint = <&dsi_to_decon>;
+            };
+        };
     };

drivers/gpu/drm/exynos/exynos7_drm_decon.c

···
 	void __iomem			*regs;
 	unsigned long			irq_flags;
 	bool				i80_if;
-	bool				suspended;
 	wait_queue_head_t		wait_vsync_queue;
 	atomic_t			wait_vsync_event;
 
···
 
 static void decon_wait_for_vblank(struct decon_context *ctx)
 {
-	if (ctx->suspended)
-		return;
-
 	atomic_set(&ctx->wait_vsync_event, 1);
 
 	/*
···
 	struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;
 	u32 val, clkdiv;
 
-	if (ctx->suspended)
-		return;
-
 	/* nothing to do if we haven't set the mode yet */
 	if (mode->htotal == 0 || mode->vtotal == 0)
 		return;
···
 	struct decon_context *ctx = crtc->ctx;
 	u32 val;
 
-	if (ctx->suspended)
-		return -EPERM;
-
 	if (!test_and_set_bit(0, &ctx->irq_flags)) {
 		val = readl(ctx->regs + VIDINTCON0);
 
···
 {
 	struct decon_context *ctx = crtc->ctx;
 	u32 val;
-
-	if (ctx->suspended)
-		return;
 
 	if (test_and_clear_bit(0, &ctx->irq_flags)) {
 		val = readl(ctx->regs + VIDINTCON0);
···
 	struct decon_context *ctx = crtc->ctx;
 	int i;
 
-	if (ctx->suspended)
-		return;
-
 	for (i = 0; i < WINDOWS_NR; i++)
 		decon_shadow_protect_win(ctx, i, true);
 }
···
 	unsigned int cpp = fb->format->cpp[0];
 	unsigned int pitch = fb->pitches[0];
 	unsigned int vidw_addr0_base = ctx->data->vidw_buf_start_base;
-
-	if (ctx->suspended)
-		return;
 
 	/*
 	 * SHADOWCON/PRTCON register is used for enabling timing.
···
 	unsigned int win = plane->index;
 	u32 val;
 
-	if (ctx->suspended)
-		return;
-
 	/* protect windows */
 	decon_shadow_protect_win(ctx, win, true);
 
···
 {
 	struct decon_context *ctx = crtc->ctx;
 	int i;
-
-	if (ctx->suspended)
-		return;
 
 	for (i = 0; i < WINDOWS_NR; i++)
 		decon_shadow_protect_win(ctx, i, false);
···
 	struct decon_context *ctx = crtc->ctx;
 	int ret;
 
-	if (!ctx->suspended)
-		return;
-
 	ret = pm_runtime_resume_and_get(ctx->dev);
 	if (ret < 0) {
 		DRM_DEV_ERROR(ctx->dev, "failed to enable DECON device.\n");
···
 		decon_enable_vblank(ctx->crtc);
 
 	decon_commit(ctx->crtc);
-
-	ctx->suspended = false;
 }
 
 static void decon_atomic_disable(struct exynos_drm_crtc *crtc)
 {
 	struct decon_context *ctx = crtc->ctx;
 	int i;
-
-	if (ctx->suspended)
-		return;
 
 	/*
 	 * We need to make sure that all windows are disabled before we
···
 		decon_disable_plane(crtc, &ctx->planes[i]);
 
 	pm_runtime_put_sync(ctx->dev);
-
-	ctx->suspended = true;
 }
 
 static const struct exynos_drm_crtc_ops decon_crtc_ops = {
···
 		return -ENOMEM;
 
 	ctx->dev = dev;
-	ctx->suspended = true;
 	ctx->data = of_device_get_match_data(dev);
 
 	i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");

drivers/gpu/drm/exynos/exynos_drm_dsi.c

···
 	.host_ops = &exynos_dsi_exynos_host_ops,
 };
 
+static const struct samsung_dsim_plat_data exynos7870_dsi_pdata = {
+	.hw_type = DSIM_TYPE_EXYNOS7870,
+	.host_ops = &exynos_dsi_exynos_host_ops,
+};
+
 static const struct of_device_id exynos_dsi_of_match[] = {
 	{
 		.compatible = "samsung,exynos3250-mipi-dsi",
···
 	{
 		.compatible = "samsung,exynos5433-mipi-dsi",
 		.data = &exynos5433_dsi_pdata,
+	},
+	{
+		.compatible = "samsung,exynos7870-mipi-dsi",
+		.data = &exynos7870_dsi_pdata,
 	},
 	{ /* sentinel. */ }
 };