[PATCH v7 1/3] gpu: drm: separate panel orientation property creating and value setting

[PATCH v7 1/3] gpu: drm: separate panel orientation property creating and value setting

[Hsin-Yi Wang]

drm_dev_register() sets connector->registration_state to
DRM_CONNECTOR_REGISTERED and dev->registered to true. If
drm_connector_set_panel_orientation() is first called after
drm_dev_register(), it will fail several checks and results in following
warning.

Add a function to create panel orientation property and set default value
to UNKNOWN, so drivers can call this function to init the property earlier
, and let the panel set the real value later.

[    4.480976] ------------[ cut here ]------------
[    4.485603] WARNING: CPU: 5 PID: 369 at drivers/gpu/drm/drm_mode_object.c:45 __drm_mode_object_add+0xb4/0xbc
<snip>
[    4.609772] Call trace:
[    4.612208]  __drm_mode_object_add+0xb4/0xbc
[    4.616466]  drm_mode_object_add+0x20/0x2c
[    4.620552]  drm_property_create+0xdc/0x174
[    4.624723]  drm_property_create_enum+0x34/0x98
[    4.629241]  drm_connector_set_panel_orientation+0x64/0xa0
[    4.634716]  boe_panel_get_modes+0x88/0xd8
[    4.638802]  drm_panel_get_modes+0x2c/0x48
[    4.642887]  panel_bridge_get_modes+0x1c/0x28
[    4.647233]  drm_bridge_connector_get_modes+0xa0/0xd4
[    4.652273]  drm_helper_probe_single_connector_modes+0x218/0x700
[    4.658266]  drm_mode_getconnector+0x1b4/0x45c
[    4.662699]  drm_ioctl_kernel+0xac/0x128
[    4.666611]  drm_ioctl+0x268/0x410
[    4.670002]  drm_compat_ioctl+0xdc/0xf0
[    4.673829]  __arm64_compat_sys_ioctl+0xc8/0x100
[    4.678436]  el0_svc_common+0xf4/0x1c0
[    4.682174]  do_el0_svc_compat+0x28/0x3c
[    4.686088]  el0_svc_compat+0x10/0x1c
[    4.689738]  el0_sync_compat_handler+0xa8/0xcc
[    4.694171]  el0_sync_compat+0x178/0x180
[    4.698082] ---[ end trace b4f2db9d9c88610b ]---
[    4.702721] ------------[ cut here ]------------
[    4.707329] WARNING: CPU: 5 PID: 369 at drivers/gpu/drm/drm_mode_object.c:243 drm_object_attach_property+0x48/0xb8
<snip>
[    4.833830] Call trace:
[    4.836266]  drm_object_attach_property+0x48/0xb8
[    4.840958]  drm_connector_set_panel_orientation+0x84/0xa0
[    4.846432]  boe_panel_get_modes+0x88/0xd8
[    4.850516]  drm_panel_get_modes+0x2c/0x48
[    4.854600]  panel_bridge_get_modes+0x1c/0x28
[    4.858946]  drm_bridge_connector_get_modes+0xa0/0xd4
[    4.863984]  drm_helper_probe_single_connector_modes+0x218/0x700
[    4.869978]  drm_mode_getconnector+0x1b4/0x45c
[    4.874410]  drm_ioctl_kernel+0xac/0x128
[    4.878320]  drm_ioctl+0x268/0x410
[    4.881711]  drm_compat_ioctl+0xdc/0xf0
[    4.885536]  __arm64_compat_sys_ioctl+0xc8/0x100
[    4.890142]  el0_svc_common+0xf4/0x1c0
[    4.893879]  do_el0_svc_compat+0x28/0x3c
[    4.897791]  el0_svc_compat+0x10/0x1c
[    4.901441]  el0_sync_compat_handler+0xa8/0xcc
[    4.905873]  el0_sync_compat+0x178/0x180
[    4.909783] ---[ end trace b4f2db9d9c88610c ]---

Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
---
v6 -> v7:
- Rebase to latest drm-misc.
- Add function for amdgpu_dm.
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |  1 +
 drivers/gpu/drm/drm_connector.c               | 58 ++++++++++++++-----
 drivers/gpu/drm/i915/display/icl_dsi.c        |  1 +
 drivers/gpu/drm/i915/display/intel_dp.c       |  1 +
 drivers/gpu/drm/i915/display/vlv_dsi.c        |  1 +
 include/drm/drm_connector.h                   |  2 +
 6 files changed, 48 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index e8a994559b6580..3eb0be187292ff 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -8105,6 +8105,7 @@ static void amdgpu_set_panel_orientation(struct drm_connector *connector)
 	if (native_mode->hdisplay == 0 || native_mode->vdisplay == 0)
 		return;
 
+	drm_connector_init_panel_orientation_property(connector);
 	drm_connector_set_panel_orientation_with_quirk(connector,
 						       DRM_MODE_PANEL_ORIENTATION_UNKNOWN,
 						       native_mode->hdisplay,
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index a50c82bc2b2fec..041e496c8f15a9 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -1252,7 +1252,7 @@ static const struct drm_prop_enum_list dp_colorspaces[] = {
  *	INPUT_PROP_DIRECT) will still map 1:1 to the actual LCD panel
  *	coordinates, so if userspace rotates the picture to adjust for
  *	the orientation it must also apply the same transformation to the
- *	touchscreen input coordinates. This property is initialized by calling
+ *	touchscreen input coordinates. This property value is set by calling
  *	drm_connector_set_panel_orientation() or
  *	drm_connector_set_panel_orientation_with_quirk()
  *
@@ -2341,8 +2341,8 @@ EXPORT_SYMBOL(drm_connector_set_vrr_capable_property);
  * @connector: connector for which to set the panel-orientation property.
  * @panel_orientation: drm_panel_orientation value to set
  *
- * This function sets the connector's panel_orientation and attaches
- * a "panel orientation" property to the connector.
+ * This function sets the connector's panel_orientation value. If the property
+ * doesn't exist, it will return an error.
  *
  * Calling this function on a connector where the panel_orientation has
  * already been set is a no-op (e.g. the orientation has been overridden with
@@ -2373,19 +2373,11 @@ int drm_connector_set_panel_orientation(
 	info->panel_orientation = panel_orientation;
 
 	prop = dev->mode_config.panel_orientation_property;
-	if (!prop) {
-		prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
-				"panel orientation",
-				drm_panel_orientation_enum_list,
-				ARRAY_SIZE(drm_panel_orientation_enum_list));
-		if (!prop)
-			return -ENOMEM;
-
-		dev->mode_config.panel_orientation_property = prop;
-	}
+	if (WARN_ON(!prop))
+		return -EINVAL;
 
-	drm_object_attach_property(&connector->base, prop,
-				   info->panel_orientation);
+	drm_object_property_set_value(&connector->base, prop,
+				      info->panel_orientation);
 	return 0;
 }
 EXPORT_SYMBOL(drm_connector_set_panel_orientation);
@@ -2393,7 +2385,7 @@ EXPORT_SYMBOL(drm_connector_set_panel_orientation);
 /**
  * drm_connector_set_panel_orientation_with_quirk - set the
  *	connector's panel_orientation after checking for quirks
- * @connector: connector for which to init the panel-orientation property.
+ * @connector: connector for which to set the panel-orientation property.
  * @panel_orientation: drm_panel_orientation value to set
  * @width: width in pixels of the panel, used for panel quirk detection
  * @height: height in pixels of the panel, used for panel quirk detection
@@ -2420,6 +2412,40 @@ int drm_connector_set_panel_orientation_with_quirk(
 }
 EXPORT_SYMBOL(drm_connector_set_panel_orientation_with_quirk);
 
+/**
+ * drm_connector_init_panel_orientation_property -
+ * 	create the connector's panel orientation property
+ *
+ * This function attaches a "panel orientation" property to the connector
+ * and initializes its value to DRM_MODE_PANEL_ORIENTATION_UNKNOWN.
+ *
+ * The value of the property can be set by drm_connector_set_panel_orientation()
+ * or drm_connector_set_panel_orientation_with_quirk() later.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_connector_init_panel_orientation_property(
+	struct drm_connector *connector)
+{
+	struct drm_device *dev = connector->dev;
+	struct drm_property *prop;
+
+	prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
+			"panel orientation",
+			drm_panel_orientation_enum_list,
+			ARRAY_SIZE(drm_panel_orientation_enum_list));
+	if (!prop)
+		return -ENOMEM;
+
+	dev->mode_config.panel_orientation_property = prop;
+	drm_object_attach_property(&connector->base, prop,
+				   DRM_MODE_PANEL_ORIENTATION_UNKNOWN);
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_connector_init_panel_orientation_property);
+
 static const struct drm_prop_enum_list privacy_screen_enum[] = {
 	{ PRIVACY_SCREEN_DISABLED,		"Disabled" },
 	{ PRIVACY_SCREEN_ENABLED,		"Enabled" },
diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index 5781e9fac8b453..c351c3d3c2d4d0 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -1979,6 +1979,7 @@ static void icl_dsi_add_properties(struct intel_connector *connector)
 
 	connector->base.state->scaling_mode = DRM_MODE_SCALE_ASPECT;
 
+	drm_connector_init_panel_orientation_property(&connector->base);
 	drm_connector_set_panel_orientation_with_quirk(&connector->base,
 				intel_dsi_get_panel_orientation(connector),
 				connector->panel.fixed_mode->hdisplay,
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index d8a0f7a2b9395a..776ddc2452f71f 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -5026,6 +5026,7 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
 	intel_backlight_setup(intel_connector, pipe);
 
 	if (fixed_mode) {
+		drm_connector_init_panel_orientation_property(connector);
 		drm_connector_set_panel_orientation_with_quirk(connector,
 				dev_priv->vbt.orientation,
 				fixed_mode->hdisplay, fixed_mode->vdisplay);
diff --git a/drivers/gpu/drm/i915/display/vlv_dsi.c b/drivers/gpu/drm/i915/display/vlv_dsi.c
index 20141f33ed6444..ac65b23665d28a 100644
--- a/drivers/gpu/drm/i915/display/vlv_dsi.c
+++ b/drivers/gpu/drm/i915/display/vlv_dsi.c
@@ -1649,6 +1649,7 @@ static void vlv_dsi_add_properties(struct intel_connector *connector)
 
 	connector->base.state->scaling_mode = DRM_MODE_SCALE_ASPECT;
 
+	drm_connector_init_panel_orientation_property(&connector->base);
 	drm_connector_set_panel_orientation_with_quirk(&connector->base,
 						       intel_dsi_get_panel_orientation(connector),
 						       connector->panel.fixed_mode->hdisplay,
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 64cf5f88c05b6a..d3448a71bb4d85 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1798,6 +1798,8 @@ int drm_connector_set_panel_orientation_with_quirk(
 	struct drm_connector *connector,
 	enum drm_panel_orientation panel_orientation,
 	int width, int height);
+int drm_connector_init_panel_orientation_property(
+	struct drm_connector *connector);
 int drm_connector_attach_max_bpc_property(struct drm_connector *connector,
 					  int min, int max);
 void drm_connector_create_privacy_screen_properties(struct drm_connector *conn);
-- 
2.35.0.263.gb82422642f-goog

[PATCH v7 2/3] drm/mediatek: init panel orientation property

[Hsin-Yi Wang]

Init panel orientation property after connector is initialized. Let the
panel driver decides the orientation value later.

Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Acked-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
---
 drivers/gpu/drm/mediatek/mtk_dsi.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index 5d90d2eb001935..491bf5b0a2b984 100644
--- a/drivers/gpu/drm/mediatek/mtk_dsi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
@@ -965,6 +965,13 @@ static int mtk_dsi_encoder_init(struct drm_device *drm, struct mtk_dsi *dsi)
 		ret = PTR_ERR(dsi->connector);
 		goto err_cleanup_encoder;
 	}
+
+	ret = drm_connector_init_panel_orientation_property(dsi->connector);
+	if (ret) {
+		DRM_ERROR("Unable to init panel orientation\n");
+		goto err_cleanup_encoder;
+	}
+
 	drm_connector_attach_encoder(dsi->connector, &dsi->encoder);
 
 	return 0;
-- 
2.35.0.263.gb82422642f-goog

[PATCH v7 3/3] arm64: dts: mt8183: Add panel rotation

[Hsin-Yi Wang]

krane, kakadu, and kodama boards have a default panel rotation.

Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Tested-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
---
 arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
index b42d81d26d7211..d29d4378170971 100644
--- a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
@@ -276,6 +276,7 @@ panel: panel@0 {
 		avee-supply = <&ppvarp_lcd>;
 		pp1800-supply = <&pp1800_lcd>;
 		backlight = <&backlight_lcd0>;
+		rotation = <270>;
 		port {
 			panel_in: endpoint {
 				remote-endpoint = <&dsi_out>;
-- 
2.35.0.263.gb82422642f-goog

Re: [Intel-gfx] [PATCH v7 1/3] gpu: drm: separate panel orientation property creating and value setting

[Ville Syrjälä]

On Tue, Feb 08, 2022 at 03:37:12PM +0800, Hsin-Yi Wang wrote:
> +int drm_connector_init_panel_orientation_property(
> +	struct drm_connector *connector)
> +{
> +	struct drm_device *dev = connector->dev;
> +	struct drm_property *prop;
> +
> +	prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
> +			"panel orientation",
> +			drm_panel_orientation_enum_list,
> +			ARRAY_SIZE(drm_panel_orientation_enum_list));
> +	if (!prop)
> +		return -ENOMEM;
> +
> +	dev->mode_config.panel_orientation_property = prop;

Leak when called multiple times. I guess you could just put
this into drm_connector_create_standard_properties() instead
and avoid that issue entirely.

-- 
Ville Syrjälä
Intel

Re: [Intel-gfx] [PATCH v7 1/3] gpu: drm: separate panel orientation property creating and value setting

[Hsin-Yi Wang]

On Tue, Feb 8, 2022 at 3:52 PM Ville Syrjälä
<ville.syrjala@linux.intel.com> wrote:
>
> On Tue, Feb 08, 2022 at 03:37:12PM +0800, Hsin-Yi Wang wrote:
> > +int drm_connector_init_panel_orientation_property(
> > +     struct drm_connector *connector)
> > +{
> > +     struct drm_device *dev = connector->dev;
> > +     struct drm_property *prop;
> > +
> > +     prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
> > +                     "panel orientation",
> > +                     drm_panel_orientation_enum_list,
> > +                     ARRAY_SIZE(drm_panel_orientation_enum_list));
> > +     if (!prop)
> > +             return -ENOMEM;
> > +
> > +     dev->mode_config.panel_orientation_property = prop;
>
> Leak when called multiple times. I guess you could just put
> this into drm_connector_create_standard_properties() instead
> and avoid that issue entirely.
>
I'll add a check for dev->mode_config.panel_orientation_property to
avoid the leak issue if called multiple times.
If we add in drm_connector_create_standard_properties(), we still need
another function to attach the property earlier for bridge/connectors
that require this property, since not all bridge/connectors need this
property.

> --
> Ville Syrjälä
> Intel