Added a property to enable user space to set aspect ratio. This patch contains declaration of the property and code to create the property.
v2: Thierry's review comments. - Made aspect ratio enum generic instead of HDMI/CEA specfic - Removed usage of temporary aspect_ratio variable
v3: Thierry's review comments. - Fixed indentation
v4: Thierry's review comments. - Return ENOMEM when property creation fails
Signed-off-by: Vandana Kannan vandana.kannan@intel.com Cc: Thierry Reding thierry.reding@gmail.com --- drivers/gpu/drm/drm_crtc.c | 33 +++++++++++++++++++++++++++++++++ include/drm/drm_crtc.h | 2 ++ include/uapi/drm/drm_mode.h | 5 +++++ 3 files changed, 40 insertions(+)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 37a3e07..a745df3 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -139,6 +139,12 @@ static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { DRM_MODE_SCALE_ASPECT, "Full aspect" }, };
+static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { + { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, + { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, + { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, +}; + /* * Non-global properties, but "required" for certain connectors. */ @@ -1344,6 +1350,33 @@ int drm_mode_create_scaling_mode_property(struct drm_device *dev) EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
/** + * drm_mode_create_aspect_ratio_property - create aspect ratio property + * @dev: DRM device + * + * Called by a driver the first time it's needed, must be attached to desired + * connectors. + * + * Returns: + * Zero on success, errno on failure. + */ +int drm_mode_create_aspect_ratio_property(struct drm_device *dev) +{ + if (dev->mode_config.aspect_ratio_property) + return 0; + + dev->mode_config.aspect_ratio_property = + drm_property_create_enum(dev, 0, "aspect ratio", + drm_aspect_ratio_enum_list, + ARRAY_SIZE(drm_aspect_ratio_enum_list)); + + if (dev->mode_config.aspect_ratio_property == NULL) + return -ENOMEM; + + return 0; +} +EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); + +/** * drm_mode_create_dirty_property - create dirty property * @dev: DRM device * diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 5c1c31c..1149617 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -801,6 +801,7 @@ struct drm_mode_config {
/* Optional properties */ struct drm_property *scaling_mode_property; + struct drm_property *aspect_ratio_property; struct drm_property *dirty_info_property;
/* dumb ioctl parameters */ @@ -971,6 +972,7 @@ extern int drm_mode_create_dvi_i_properties(struct drm_device *dev); extern int drm_mode_create_tv_properties(struct drm_device *dev, int num_formats, char *formats[]); extern int drm_mode_create_scaling_mode_property(struct drm_device *dev); +extern int drm_mode_create_aspect_ratio_property(struct drm_device *dev); extern int drm_mode_create_dirty_info_property(struct drm_device *dev); extern const char *drm_get_encoder_name(const struct drm_encoder *encoder);
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h index f104c26..943b377 100644 --- a/include/uapi/drm/drm_mode.h +++ b/include/uapi/drm/drm_mode.h @@ -88,6 +88,11 @@ #define DRM_MODE_SCALE_CENTER 2 /* Centered, no scaling */ #define DRM_MODE_SCALE_ASPECT 3 /* Full screen, preserve aspect */
+/* Picture aspect ratio options */ +#define DRM_MODE_PICTURE_ASPECT_NONE 0 +#define DRM_MODE_PICTURE_ASPECT_4_3 1 +#define DRM_MODE_PICTURE_ASPECT_16_9 2 + /* Dithering mode options */ #define DRM_MODE_DITHERING_OFF 0 #define DRM_MODE_DITHERING_ON 1