On Tue, Feb 05, 2019 at 05:32:16PM +0000, Shankar, Uma wrote:
-----Original Message----- From: Ville Syrjälä [mailto:ville.syrjala@linux.intel.com] Sent: Tuesday, February 5, 2019 10:02 PM To: Shankar, Uma uma.shankar@intel.com Cc: intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org; Syrjala, Ville ville.syrjala@intel.com; Lankhorst, Maarten maarten.lankhorst@intel.com Subject: Re: [Intel-gfx] [v11 1/4] drm: Add HDMI colorspace property
On Tue, Feb 05, 2019 at 09:33:34PM +0530, Uma Shankar wrote:
Create a new connector property to program colorspace to sink devices. Modern sink devices support more than 1 type of colorspace like 601, 709, BT2020 etc. This helps to switch based on content type which is to be displayed. The decision lies with compositors as to in which scenarios, a particular colorspace will be picked.
This will be helpful mostly to switch to higher gamut colorspaces like BT2020 when the media content is encoded as BT2020. Thereby giving a good visual experience to users.
The expectation from userspace is that it should parse the EDID and get supported colorspaces. Use this property and switch to the one supported. Sink supported colorspaces should be retrieved by userspace from EDID and driver will not explicitly expose them.
Basically the expectation from userspace is:
- Set up CRTC DEGAMMA/CTM/GAMMA to convert to some sink colorspace
- Set this new property to let the sink know what it converted the CRTC output to.
v2: Addressed Maarten and Ville's review comments. Enhanced the colorspace enum to incorporate both HDMI and DP supported colorspaces. Also, added a default option for colorspace.
v3: Removed Adobe references from enum definitions as per Ville, Hans Verkuil and Jonas Karlman suggestions. Changed Default to an unset state where driver will assign the colorspace is not chosen by user, suggested by Ville and Maarten. Addressed other misc review comments from Maarten. Split the changes to have separate colorspace property for DP and HDMI.
v4: Addressed Chris and Ville's review comments, and created a common colorspace property for DP and HDMI, filtered the list based on the colorspaces supported by the respective protocol standard.
v5: Made the property creation helper accept enum list based on platform capabilties as suggested by Shashank. Consolidated HDMI and DP property creation in the common helper.
v6: Addressed Shashank's review comments.
v7: Added defines instead of enum in uapi as per Brian Starkey's suggestion in order to go with string matching at userspace. Updated the commit message to add more details as well kernel docs.
v8: Addressed Maarten's review comments.
v9: Removed macro defines from uapi as per Brian Starkey and Daniel Stone's comments and moved to drm include file. Moved back to older design with exposing all HDMI colorspaces to userspace since infoframe capability is there even on legacy platforms, as per Ville's review comments.
v10: Fixed sparse warnings, updated the RB from Maarten and Jani's ack.
v11: Addressed Ville's review comments. Updated the Macro naming and added DCI-P3 colorspace as well defined in CEA 861.G spec.
Signed-off-by: Uma Shankar uma.shankar@intel.com Acked-by: Jani Nikula jani.nikula@intel.com Reviewed-by: Shashank Sharma shashank.sharma@intel.com Reviewed-by: Maarten Lankhorst maarten.lankhorst@linux.intel.com
drivers/gpu/drm/drm_atomic_uapi.c | 4 ++ drivers/gpu/drm/drm_connector.c | 78
+++++++++++++++++++++++++++++++++++++++
include/drm/drm_connector.h | 50 +++++++++++++++++++++++++ 3 files changed, 132 insertions(+)
diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c index 9a1f41a..9b5d44f 100644 --- a/drivers/gpu/drm/drm_atomic_uapi.c +++ b/drivers/gpu/drm/drm_atomic_uapi.c @@ -746,6 +746,8 @@ static int drm_atomic_connector_set_property(struct
drm_connector *connector,
return -EINVAL; } state->content_protection = val;
- } else if (property == connector->colorspace_property) {
state->colorspace = val;NULL, val);
int ret = drm_atomic_set_writeback_fb_for_connector(state,fb); @@
-814,6 +816,8 @@ static int drm_atomic_connector_set_property(struct
drm_connector *connector,
*val = state->picture_aspect_ratio;} else if (property == config->content_type_property) { *val = state->content_type;
- } else if (property == connector->colorspace_property) {
*val = state->colorspace;diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index 8475396..4309873 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -826,6 +826,33 @@ int drm_display_info_set_bus_formats(struct drm_display_info *info, }; DRM_ENUM_NAME_FN(drm_get_content_protection_name,
drm_cp_enum_list)
+static const struct drm_prop_enum_list hdmi_colorspaces[] = {
- /* For Default case, driver will set the colorspace */
- { DRM_MODE_COLORIMETRY_DEFAULT, "Default" },
- /* Standard Definition Colorimetry based on CEA 861 */
- { DRM_MODE_COLORIMETRY_SMPTE_170M, "SMPTE_170M" },
- { DRM_MODE_COLORIMETRY_BT709, "BT709" },
- /* Standard Definition Colorimetry based on IEC 61966-2-4 */
- { DRM_MODE_COLORIMETRY_XVYCC_601, "XVYCC_601" },
- /* High Definition Colorimetry based on IEC 61966-2-4 */
- { DRM_MODE_COLORIMETRY_XVYCC_709, "XVYCC_709" },
- /* Colorimetry based on IEC 61966-2-1/Amendment 1 */
- { DRM_MODE_COLORIMETRY_SYCC_601, "SYCC_601" },
- /* Colorimetry based on IEC 61966-2-5 [33] */
- { DRM_MODE_COLORIMETRY_OPYCC_601, "opYCC_601" },
- /* Colorimetry based on IEC 61966-2-5 */
- { DRM_MODE_COLORIMETRY_OPRGB, "opRGB" },
- /* Colorimetry based on ITU-R BT.2020 */
- { DRM_MODE_COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
- /* Colorimetry based on ITU-R BT.2020 */
- { DRM_MODE_COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
- /* Colorimetry based on ITU-R BT.2020 */
- { DRM_MODE_COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" },
- /* Added as part of Additional Colorimetry Extension in 861.G */
- { DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65, "DCI-P3_RGB_D65" },
- { DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER, "DCI-
P3_RGB_Theater" },
+};
/**
- DOC: standard connector properties
@@ -1548,6 +1575,57 @@ int drm_mode_create_aspect_ratio_property(struct drm_device *dev) EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
/**
- DOC: standard connector properties
- Colorspace:
drm_mode_create_colorspace_property - create colorspace property
This property helps select a suitable colorspace based on the sink
capability. Modern sink devices support wider gamut like BT2020.
This helps switch to BT2020 mode if the BT2020 encoded video stream
is being played by the user, same for any other colorspace. Thereby
giving a good visual experience to users.
The expectation from userspace is that it should parse the EDID
and get supported colorspaces. Use this property and switch to the
one supported. Sink supported colorspaces should be retrieved by
userspace from EDID and driver will not explicitly expose them.
Basically the expectation from userspace is:
- Set up CRTC DEGAMMA/CTM/GAMMA to convert to some sink
colorspace
- Set this new property to let the sink know what it
converted the CRTC output to.
- This property is just to inform sink what colorspace
source is trying to drive.
- Called by a driver the first time it's needed, must be attached to
+desired
- connectors.
- */
+int drm_mode_create_colorspace_property(struct drm_connector +*connector) {
- struct drm_device *dev = connector->dev;
- struct drm_property *prop;
- if (connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
connector->connector_type == DRM_MODE_CONNECTOR_HDMIB) {prop = drm_property_create_enum(dev,DRM_MODE_PROP_ENUM,
"Colorspace",hdmi_colorspaces,ARRAY_SIZE(hdmi_colorspaces));
if (!prop)return -ENOMEM;- } else {
DRM_DEBUG_KMS("Colorspace property not supported\n");return 0;- }
- connector->colorspace_property = prop;
- return 0;
+} +EXPORT_SYMBOL(drm_mode_create_colorspace_property);
+/**
- drm_mode_create_content_type_property - create content type property
- @dev: DRM device
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 9941613..58db66e 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -253,6 +253,42 @@ enum drm_panel_orientation { DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, };
+/*
- This is a consolidated colorimetry list supported by HDMI and
- DP protocol standard. The respective connectors will register
- a property with the subset of this list (supported by that
- respective protocol). Userspace will set the colorspace through
- a colorspace property which will be created and exposed to
- userspace.
- */
+/* For Default case, driver will set the colorspace */ +#define DRM_MODE_COLORIMETRY_DEFAULT 0 +/* CEA 861 Normal Colorimetry options */ +#define DRM_MODE_COLORIMETRY_NO_DATA 0 +#define DRM_MODE_COLORIMETRY_SMPTE_170M 1 +#define DRM_MODE_COLORIMETRY_BT709 2
Still missing the YCbCr information in these two.
As per CTA 861.G spec, we have these as only SMPTE_170M and ITU-R BT709, with no specific mention of RGB or YCbCr. Hence, kept it as per spec. We seem to have a common field for both as per CTA spec. Correct me if my understanding is wrong.
Check "Table 14 Picture Colorimetry Indicated by the RGB or YC B C R (Y), Colorimetry (C) and Extended Colorimetry (EC) Field Settings"
+/* CEA 861 Extended Colorimetry Options */ +#define DRM_MODE_COLORIMETRY_XVYCC_601 3 +#define DRM_MODE_COLORIMETRY_XVYCC_709 4 +#define DRM_MODE_COLORIMETRY_SYCC_601 5 +#define DRM_MODE_COLORIMETRY_OPYCC_601 6 +#define DRM_MODE_COLORIMETRY_OPRGB 7 +#define DRM_MODE_COLORIMETRY_BT2020_YCC 8 +/* Both BT2020_RGB and BT2020_YCbCbCr have same value */ +#define DRM_MODE_COLORIMETRY_BT2020_RGB 9 +#define DRM_MODE_COLORIMETRY_BT2020_CYCC 9
I though you didn't want these numbers to be based on the spec numbers? This duplicated value seems to go against that idea.
Yeah, for HDMI somehow was trying to utilize the definitions to advantage. But I feel, It's better to de-couple this. Define this as normal enum values sequentially so that userspace get readable serial number kind values. And use these in encoder files to get proper values to be programmed as per respective spec, while defining those values per encoder separately. Hope this is fine.
+/* Additional Colorimetry extension added as part of CTA 861.G */ +#define DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65 10 +#define DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER 11
+/* DP MSA Colorimetry Options */ +#define DRM_MODE_DP_COLORIMETRY_YCBCR_ITU_601 12 +#define DRM_MODE_DP_COLORIMETRY_YCBCR_ITU_709 13
Still inconsistent naming in many places (ITU_ vs. BT, YCBCR vs. YCC, order of the two).
Will fix this. Thanks Ville.
+#define DRM_MODE_DP_COLORIMETRY_SRGB 14 +#define DRM_MODE_DP_COLORIMETRY_RGB_WIDE_GAMUT 15 +#define DRM_MODE_DP_COLORIMETRY_SCRGB 16
/**
- struct drm_display_info - runtime data about the connected sink
@@ -503,6 +539,13 @@ struct drm_connector_state { unsigned int content_protection;
/**
* @colorspace: State variable for Connector property to request* colorspace change on Sink. This is most commonly used to switch* to wider color gamuts like BT2020.*/- u32 colorspace;
- /**
- @writeback_job: Writeback job for writeback connectors
- Holds the framebuffer and out-fence for a writeback connector. As
@@ -995,6 +1038,12 @@ struct drm_connector { struct drm_property *content_protection_property;
/**
* @colorspace_property: Connector property to set the suitable* colorspace supported by the sink.*/- struct drm_property *colorspace_property;
- /**
- @path_blob_ptr:
- DRM blob property data for the DP MST path property. This should
only @@ -1269,6 +1318,7 @@ int drm_connector_attach_vrr_capable_property( int drm_connector_attach_content_protection_property( struct drm_connector *connector); int drm_mode_create_aspect_ratio_property(struct drm_device *dev); +int drm_mode_create_colorspace_property(struct drm_connector +*connector); int drm_mode_create_content_type_property(struct drm_device *dev); void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe
*frame,
const struct drm_connector_state*conn_state);
-- 1.9.1
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-- Ville Syrjälä Intel