Merge tag 'exynos-drm-next-for-v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-next

One fixup series
- Make sure to restore bridge chain order by enabling the drm panel
  prepare_prev_first flag of the bridge and panel drivers - tc358764 display
  bridge device and Samsung s6e3ha2/s6e63j0x03/s6e8aa0 panel devices.
  In case of any boards using Exynos5433 SoC, below Display pipeline could be
  configured.
      Decon -> MIC -> MIPI-DSI -> Panel
  So, this patch series makes sure to enable previous bridge device before
  enabling MIPI-DSI device.

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Inki Dae <inki.dae@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230130051055.15340-1-inki.dae@samsung.com

5 files changed, 11 insertions, 2 deletions

diff --git a/drivers/gpu/drm/bridge/tc358764.c b/drivers/gpu/drm/bridge/tc358764.c
index 53259c12d777..f85654f1b104 100644
--- a/drivers/gpu/drm/bridge/tc358764.c
+++ b/drivers/gpu/drm/bridge/tc358764.c
@@ -369,6 +369,7 @@ static int tc358764_probe(struct mipi_dsi_device *dsi)
 
 	ctx->bridge.funcs = &tc358764_bridge_funcs;
 	ctx->bridge.of_node = dev->of_node;
+	ctx->bridge.pre_enable_prev_first = true;
 
 	drm_bridge_add(&ctx->bridge);
 
diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index 320c370cfe24..06d6513ddaae 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -1445,7 +1445,8 @@ static int exynos_dsi_attach(struct drm_bridge *bridge,
 {
 	struct exynos_dsi *dsi = bridge_to_dsi(bridge);
 
-	return drm_bridge_attach(bridge->encoder, dsi->out_bridge, NULL, flags);
+	return drm_bridge_attach(bridge->encoder, dsi->out_bridge, bridge,
+				 flags);
 }
 
 static const struct drm_bridge_funcs exynos_dsi_bridge_funcs = {
@@ -1491,7 +1492,10 @@ static int exynos_dsi_host_attach(struct mipi_dsi_host *host,
 
 	drm_bridge_add(&dsi->bridge);
 
-	drm_bridge_attach(encoder, &dsi->bridge, NULL, 0);
+	drm_bridge_attach(encoder, &dsi->bridge,
+			  list_first_entry_or_null(&encoder->bridge_chain,
+						   struct drm_bridge,
+						   chain_node), 0);
 
 	/*
 	 * This is a temporary solution and should be made by more generic way.
@@ -1726,6 +1730,7 @@ static int exynos_dsi_probe(struct platform_device *pdev)
 	dsi->bridge.funcs = &exynos_dsi_bridge_funcs;
 	dsi->bridge.of_node = dev->of_node;
 	dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;
+	dsi->bridge.pre_enable_prev_first = true;
 
 	ret = component_add(dev, &exynos_dsi_component_ops);
 	if (ret)
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c b/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c
index 439ef3073512..39eef3dce7c9 100644
--- a/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c
@@ -733,6 +733,7 @@ static int s6e3ha2_probe(struct mipi_dsi_device *dsi)
 
 	drm_panel_init(&ctx->panel, dev, &s6e3ha2_drm_funcs,
 		       DRM_MODE_CONNECTOR_DSI);
+	ctx->panel.prepare_prev_first = true;
 
 	drm_panel_add(&ctx->panel);
 
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63j0x03.c b/drivers/gpu/drm/panel/panel-samsung-s6e63j0x03.c
index 9c3e76171759..46d6f4a87bf7 100644
--- a/drivers/gpu/drm/panel/panel-samsung-s6e63j0x03.c
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e63j0x03.c
@@ -463,6 +463,7 @@ static int s6e63j0x03_probe(struct mipi_dsi_device *dsi)
 
 	drm_panel_init(&ctx->panel, dev, &s6e63j0x03_funcs,
 		       DRM_MODE_CONNECTOR_DSI);
+	ctx->panel.prepare_prev_first = true;
 
 	ctx->bl_dev = backlight_device_register("s6e63j0x03", dev, ctx,
 						&s6e63j0x03_bl_ops, NULL);
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c b/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c
index ebf4c2d39ea8..c51d07ec1529 100644
--- a/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c
@@ -1016,6 +1016,7 @@ static int s6e8aa0_probe(struct mipi_dsi_device *dsi)
 
 	drm_panel_init(&ctx->panel, dev, &s6e8aa0_drm_funcs,
 		       DRM_MODE_CONNECTOR_DSI);
+	ctx->panel.prepare_prev_first = true;
 
 	drm_panel_add(&ctx->panel);