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>
---
v9->v10: rebase to latest linux-next.
v9: https://patchwork.kernel.org/project/linux-mediatek/patch/20220318074825.3359978-2-hsinyi@chromium.org/
v8: https://patchwork.kernel.org/project/linux-mediatek/patch/20220208084234.1684930-1-hsinyi@chromium.org/
v7: https://patchwork.kernel.org/project/linux-mediatek/patch/20220208073714.1540390-1-hsinyi@chromium.org/
---
drivers/gpu/drm/drm_connector.c | 58 +++++++++++++++++++++++++--------
include/drm/drm_connector.h | 2 ++
2 files changed, 47 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 1c48d162c77e..d68cc78f6684 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()
*
@@ -2310,8 +2310,8 @@ 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 try to create one.
*
* 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
@@ -2343,18 +2343,13 @@ int drm_connector_set_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)
+ if (drm_connector_init_panel_orientation_property(connector) < 0)
return -ENOMEM;
-
- dev->mode_config.panel_orientation_property = prop;
+ prop = dev->mode_config.panel_orientation_property;
}
- 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);
@@ -2362,7 +2357,7 @@ 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
@@ -2389,6 +2384,43 @@ 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;
+
+ if(dev->mode_config.panel_orientation_property)
+ return 0;
+
+ 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/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 3ac4bf87f257..f0681091c617 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1802,6 +1802,8 @@ 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);
--
2.36.1.124.g0e6072fb45-googHi,
On 5/30/22 10:19, Hsin-Yi Wang wrote:
> 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>
> ---
> v9->v10: rebase to latest linux-next.
> v9: https://patchwork.kernel.org/project/linux-mediatek/patch/20220318074825.3359978-2-hsinyi@chromium.org/
> v8: https://patchwork.kernel.org/project/linux-mediatek/patch/20220208084234.1684930-1-hsinyi@chromium.org/
> v7: https://patchwork.kernel.org/project/linux-mediatek/patch/20220208073714.1540390-1-hsinyi@chromium.org/
> ---
> drivers/gpu/drm/drm_connector.c | 58 +++++++++++++++++++++++++--------
> include/drm/drm_connector.h | 2 ++
> 2 files changed, 47 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index 1c48d162c77e..d68cc78f6684 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()
> *
> @@ -2310,8 +2310,8 @@ 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 try to create one.
> *
> * 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
> @@ -2343,18 +2343,13 @@ int drm_connector_set_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)
> + if (drm_connector_init_panel_orientation_property(connector) < 0)
> return -ENOMEM;
> -
> - dev->mode_config.panel_orientation_property = prop;
> + prop = dev->mode_config.panel_orientation_property;
> }
>
> - 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);
> @@ -2362,7 +2357,7 @@ 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
> @@ -2389,6 +2384,43 @@ 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;
> +
> + if(dev->mode_config.panel_orientation_property)
> + return 0;
> +
> + 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);
DRM_MODE_PANEL_ORIENTATION_UNKNOWN is -1 which is not a valid value
for an enum. IOW when the panel-orientation is DRM_MODE_PANEL_ORIENTATION_UNKNOWN
then the property should not be created on the drm-connector object at all.
Which brings us back to what I said in reply to the coverletter,
it seems that you have a probe ordering problem here; and fixing that
issue would make this patch-set unnecessary.
Regards,
Hans
> +
> + 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/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index 3ac4bf87f257..f0681091c617 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -1802,6 +1802,8 @@ 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);
Hi,
On 5/30/22 10:57, Hans de Goede wrote:
> Hi,
>
> On 5/30/22 10:19, Hsin-Yi Wang wrote:
>> 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>
>> ---
>> v9->v10: rebase to latest linux-next.
>> v9: https://patchwork.kernel.org/project/linux-mediatek/patch/20220318074825.3359978-2-hsinyi@chromium.org/
>> v8: https://patchwork.kernel.org/project/linux-mediatek/patch/20220208084234.1684930-1-hsinyi@chromium.org/
>> v7: https://patchwork.kernel.org/project/linux-mediatek/patch/20220208073714.1540390-1-hsinyi@chromium.org/
>> ---
>> drivers/gpu/drm/drm_connector.c | 58 +++++++++++++++++++++++++--------
>> include/drm/drm_connector.h | 2 ++
>> 2 files changed, 47 insertions(+), 13 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
>> index 1c48d162c77e..d68cc78f6684 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()
>> *
>> @@ -2310,8 +2310,8 @@ 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 try to create one.
>> *
>> * 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
>> @@ -2343,18 +2343,13 @@ int drm_connector_set_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)
>> + if (drm_connector_init_panel_orientation_property(connector) < 0)
>> return -ENOMEM;
>> -
>> - dev->mode_config.panel_orientation_property = prop;
>> + prop = dev->mode_config.panel_orientation_property;
>> }
>>
>> - 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);
>> @@ -2362,7 +2357,7 @@ 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
>> @@ -2389,6 +2384,43 @@ 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;
>> +
>> + if(dev->mode_config.panel_orientation_property)
>> + return 0;
>> +
>> + 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);
>
> DRM_MODE_PANEL_ORIENTATION_UNKNOWN is -1 which is not a valid value
> for an enum. IOW when the panel-orientation is DRM_MODE_PANEL_ORIENTATION_UNKNOWN
> then the property should not be created on the drm-connector object at all.
p.s. note that the original drm_connector_set_panel_orientation() avoids
ever creating the property when the orientation is unknown because of
this bit of code near the top of the function:
/* Don't attach the property if the orientation is unknown */
if (panel_orientation == DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
return 0;
> Which brings us back to what I said in reply to the coverletter,
> it seems that you have a probe ordering problem here; and fixing that
> issue would make this patch-set unnecessary.
Regards,
Hans
>> +
>> + 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/include/drm/drm_connector.h b/include/drm/drm_connector.h
>> index 3ac4bf87f257..f0681091c617 100644
>> --- a/include/drm/drm_connector.h
>> +++ b/include/drm/drm_connector.h
>> @@ -1802,6 +1802,8 @@ 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);
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