There exists a property IN_FORMATS which exposes the plane supported
modifiers/formats to the user. In some platforms when asynchronous flips
are used all of modifiers/formats mentioned in IN_FORMATS are not
supported. This patch adds a new plane property IN_FORMATS_ASYNC to
expose the async flips supported modifiers/formats so that user can use
this information ahead and done flips with unsupported
formats/modifiers. This will save flips failures.
v2: Remove async variable from drm_plane (Ville)
Signed-off-by: Arun R Murthy <arun.r.mur...@intel.com>
---
drivers/gpu/drm/drm_mode_config.c | 7 +++++++
drivers/gpu/drm/drm_plane.c | 6 ++++++
include/drm/drm_mode_config.h | 6 ++++++
3 files changed, 19 insertions(+)
diff --git a/drivers/gpu/drm/drm_mode_config.c
b/drivers/gpu/drm/drm_mode_config.c
index 37d2e0a4ef4b..cff189a2e751 100644
--- a/drivers/gpu/drm/drm_mode_config.c
+++ b/drivers/gpu/drm/drm_mode_config.c
@@ -379,6 +379,13 @@ static int drm_mode_create_standard_properties(struct
drm_device *dev)
return -ENOMEM;
dev->mode_config.size_hints_property = prop;
+ prop = drm_property_create(dev,
+ DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
+ "IN_FORMATS_ASYNC", 0);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.async_modifiers_property = prop;
+
return 0;
}
diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index a28b22fdd7a4..416818e54ccf 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -141,6 +141,12 @@
* various bugs in this area with inconsistencies between the capability
* flag and per-plane properties.
*
+ * IN_FORMATS_ASYNC:
+ * Blob property which contains the set of buffer format and modifier
+ * pairs supported by this plane for asynchronous flips. The blob is a
struct
+ * drm_format_modifier_blob. Without this property the plane doesn't
+ * support buffers with modifiers. Userspace cannot change this property.
+ *
* SIZE_HINTS:
* Blob property which contains the set of recommended plane size
* which can used for simple "cursor like" use cases (eg. no scaling).
diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
index 271765e2e9f2..0c116d6dfd27 100644
--- a/include/drm/drm_mode_config.h
+++ b/include/drm/drm_mode_config.h
@@ -936,6 +936,12 @@ struct drm_mode_config {
*/
struct drm_property *modifiers_property;
+ /**
+ * @async_modifiers_property: Plane property to list support
modifier/format
+ * combination for asynchronous flips.
+ */
+ struct drm_property *async_modifiers_property;
+
/**
* @size_hints_property: Plane SIZE_HINTS property.
*/
--
2.25.1
