[v7 0/2] Add Colorspace connector property interface

[v7 0/2] Add Colorspace connector property interface

[Uma Shankar]

This patch series creates 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. Driver will expose the platform supported colorspaces,
however sink supported colorspaces should be retrieved by userspace
from EDID.

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.

Have tested this using xrandr by using below command:
xrandr --output HDMI2 --set "Colorspace" "BT2020_rgb"

v2: Addressed Ville and Maarten's review comments. Merged the 2nd
and 3rd patch into one common logical patch.

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
when 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. Handled the default case more efficiently.

v5: Modified the colorspace property creation helper to take
platform specific enum list based on the capabilities of the
platform as suggested by Shashank. With this there is no need
for segregation between DP and HDMI.

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 kernel doc as well with more details.

Uma Shankar (2):
  drm: Add colorspace connector property
  drm/i915: Attach colorspace property and enable modeset

 drivers/gpu/drm/drm_atomic_uapi.c      |  4 ++
 drivers/gpu/drm/drm_connector.c        | 79 ++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_atomic.c    |  1 +
 drivers/gpu/drm/i915/intel_connector.c | 63 +++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_drv.h       |  1 +
 drivers/gpu/drm/i915/intel_hdmi.c      | 19 ++++++++
 include/drm/drm_connector.h            | 17 ++++++++
 include/uapi/drm/drm_mode.h            | 32 ++++++++++++++
 8 files changed, 216 insertions(+)

-- 
1.9.1

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[v7 1/2] drm: Add colorspace connector property

[Uma Shankar]

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. Driver will expose the platform supported colorspaces,
however sink supported colorspaces should be retrieved by userspace
from EDID.

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.

Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
---
 drivers/gpu/drm/drm_atomic_uapi.c |  4 ++
 drivers/gpu/drm/drm_connector.c   | 95 +++++++++++++++++++++++++++++++++++++++
 include/drm/drm_connector.h       | 17 +++++++
 include/uapi/drm/drm_mode.h       | 32 +++++++++++++
 4 files changed, 148 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;
 	} else if (property == config->writeback_fb_id_property) {
 		struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, 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;
 	} else if (property == connector->scaling_mode_property) {
 		*val = state->scaling_mode;
 	} else if (property == connector->content_protection_property) {
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 8475396..eafa643 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -826,6 +826,54 @@ 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)
 
+/* List of HDMI Colorspaces supported */
+static const struct drm_prop_enum_list hdmi_colorspaces[] = {
+	/* For Default case, driver will set the colorspace */
+	{ COLORIMETRY_DEFAULT, "Default" },
+	/* Standard Definition Colorimetry based on CEA 861 */
+	{ COLORIMETRY_ITU_601, "ITU_601" },
+	{ COLORIMETRY_ITU_709, "ITU_709" },
+	/* Standard Definition Colorimetry based on IEC 61966-2-4 */
+	{ COLORIMETRY_XV_YCC_601, "XV_YCC_601" },
+	/* High Definition Colorimetry based on IEC 61966-2-4 */
+	{ COLORIMETRY_XV_YCC_709, "XV_YCC_709" },
+	/* Colorimetry based on IEC 61966-2-1/Amendment 1 */
+	{ COLORIMETRY_S_YCC_601, "S_YCC_601" },
+	/* Colorimetry based on IEC 61966-2-5 [33] */
+	{ COLORIMETRY_OPYCC_601, "opYCC_601" },
+	/* Colorimetry based on IEC 61966-2-5 */
+	{ COLORIMETRY_OPRGB, "opRGB" },
+	/* Colorimetry based on ITU-R BT.2020 */
+	{ COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
+	/* Colorimetry based on ITU-R BT.2020 */
+	{ COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
+	/* Colorimetry based on ITU-R BT.2020 */
+	{ COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" },
+};
+
+/* List of DP Colorspaces supported */
+static const struct drm_prop_enum_list dp_colorspaces[] = {
+	/* For Default case, driver will set the colorspace */
+	{ COLORIMETRY_DEFAULT, "Default" },
+	/* Standard Definition Colorimetry based on CEA 861 */
+	{ COLORIMETRY_ITU_601, "ITU_601" },
+	{ COLORIMETRY_ITU_709, "ITU_709" },
+	/* Standard Definition Colorimetry based on IEC 61966-2-4 */
+	{ COLORIMETRY_XV_YCC_601, "XV_YCC_601" },
+	/* High Definition Colorimetry based on IEC 61966-2-4 */
+	{ COLORIMETRY_XV_YCC_709, "XV_YCC_709" },
+	/* Colorimetry based on IEC 61966-2-5 */
+	{ COLORIMETRY_OPRGB, "opRGB" },
+	/* DP MSA Colorimetry */
+	{ DP_COLORIMETRY_Y_CBCR_ITU_601, "YCBCR_ITU_601" },
+	{ DP_COLORIMETRY_Y_CBCR_ITU_709, "YCBCR_ITU_709" },
+	{ DP_COLORIMETRY_SRGB, "sRGB" },
+	{ DP_COLORIMETRY_RGB_WIDE_GAMUT, "RGB Wide Gamut" },
+	{ DP_COLORIMETRY_SCRGB, "scRGB" },
+	{ DP_COLORIMETRY_DCI_P3, "DCI-P3" },
+	{ DP_COLORIMETRY_CUSTOM_COLOR_PROFILE, "Custom Profile" },
+};
+
 /**
  * DOC: standard connector properties
  *
@@ -1548,6 +1596,53 @@ 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. Driver will expose the platform supported colorspaces,
+ *     however sink supported colorspaces should be retrieved by userspace
+ *     from EDID.
+ *
+ *     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,
+					const struct drm_prop_enum_list *props,
+					int num_values)
+{
+	struct drm_device *dev = connector->dev;
+	struct drm_property *prop;
+
+	prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
+					"Colorspace",
+					props, num_values);
+	if (!prop)
+		return -ENOMEM;
+
+	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..e32cd11 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -31,6 +31,7 @@
 #include <drm/drm_util.h>
 
 #include <uapi/drm/drm_mode.h>
+#include <drm/drm_property.h>
 
 struct drm_connector_helper_funcs;
 struct drm_modeset_acquire_ctx;
@@ -503,6 +504,13 @@ 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 +1003,12 @@ 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 +1283,9 @@ 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,
+					const struct drm_prop_enum_list *props,
+					int num_values);
 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);
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index a439c2e..2bcdfcf 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -210,6 +210,38 @@
 #define DRM_MODE_CONTENT_PROTECTION_DESIRED     1
 #define DRM_MODE_CONTENT_PROTECTION_ENABLED     2
 
+/*
+ * 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 COLORIMETRY_DEFAULT	0
+/* CEA 861 Normal Colorimetry options */
+#define COLORIMETRY_ITU_601	1
+#define COLORIMETRY_ITU_709	2
+/* CEA 861 Extended Colorimetry Options */
+#define COLORIMETRY_XV_YCC_601	3
+#define COLORIMETRY_XV_YCC_709	4
+#define COLORIMETRY_S_YCC_601	5
+#define COLORIMETRY_OPYCC_601	6
+#define COLORIMETRY_OPRGB	7
+#define COLORIMETRY_BT2020_RGB	8
+#define COLORIMETRY_BT2020_YCC	9
+#define COLORIMETRY_BT2020_CYCC	10
+/* DP MSA Colorimetry Options */
+#define DP_COLORIMETRY_Y_CBCR_ITU_601	11
+#define DP_COLORIMETRY_Y_CBCR_ITU_709	12
+#define	DP_COLORIMETRY_SRGB		13
+#define	DP_COLORIMETRY_RGB_WIDE_GAMUT	14
+#define DP_COLORIMETRY_SCRGB		15
+#define DP_COLORIMETRY_DCI_P3		16
+#define DP_COLORIMETRY_CUSTOM_COLOR_PROFILE	17
+
 struct drm_mode_modeinfo {
 	__u32 clock;
 	__u16 hdisplay;
-- 
1.9.1

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[v7 2/2] drm/i915: Attach colorspace property and enable modeset

[Uma Shankar]

This patch attaches the colorspace connector property to the
hdmi connector. Based on colorspace change, modeset will be
triggered to switch to new colorspace.

Based on colorspace property value create an infoframe
with appropriate colorspace. This can be used to send an
infoframe packet with proper colorspace value set which
will help to enable wider color gamut like BT2020 on sink.

This patch attaches and enables HDMI colorspace, DP will be
taken care separately.

v2: Merged the changes of creating infoframe as well to this
patch as per Maarten's suggestion.

v3: Addressed review comments from Shashank. Separated HDMI
and DP colorspaces as suggested by Ville and Maarten.

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. Handle the default case properly.

v5: Added Platform specific colorspace enums and called the
property creation helper using the same.

v6: Addressed Shashank's review comments.

v7: Rebase

Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
---
 drivers/gpu/drm/i915/intel_atomic.c    |  1 +
 drivers/gpu/drm/i915/intel_connector.c | 63 ++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_drv.h       |  1 +
 drivers/gpu/drm/i915/intel_hdmi.c      | 19 ++++++++++
 4 files changed, 84 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c
index 16263ad..76b7114 100644
--- a/drivers/gpu/drm/i915/intel_atomic.c
+++ b/drivers/gpu/drm/i915/intel_atomic.c
@@ -124,6 +124,7 @@ int intel_digital_connector_atomic_check(struct drm_connector *conn,
 	 */
 	if (new_conn_state->force_audio != old_conn_state->force_audio ||
 	    new_conn_state->broadcast_rgb != old_conn_state->broadcast_rgb ||
+	    new_state->colorspace != old_state->colorspace ||
 	    new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
 	    new_conn_state->base.content_type != old_conn_state->base.content_type ||
 	    new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode)
diff --git a/drivers/gpu/drm/i915/intel_connector.c b/drivers/gpu/drm/i915/intel_connector.c
index ee16758..114fcf2 100644
--- a/drivers/gpu/drm/i915/intel_connector.c
+++ b/drivers/gpu/drm/i915/intel_connector.c
@@ -30,6 +30,48 @@
 #include "intel_drv.h"
 #include "i915_drv.h"
 
+static const struct drm_prop_enum_list gen10_hdmi_colorspaces[] = {
+	/* For Default case, driver will set the colorspace */
+	{ COLORIMETRY_DEFAULT, "Default" },
+	/* Standard Definition Colorimetry based on CEA 861 */
+	{ COLORIMETRY_ITU_601, "ITU_601" },
+	{ COLORIMETRY_ITU_709, "ITU_709" },
+	/* Standard Definition Colorimetry based on IEC 61966-2-4 */
+	{ COLORIMETRY_XV_YCC_601, "XV_YCC_601" },
+	/* High Definition Colorimetry based on IEC 61966-2-4 */
+	{ COLORIMETRY_XV_YCC_709, "XV_YCC_709" },
+	/* Colorimetry based on IEC 61966-2-1/Amendment 1 */
+	{ COLORIMETRY_S_YCC_601, "S_YCC_601" },
+	/* Colorimetry based on IEC 61966-2-5 [33] */
+	{ COLORIMETRY_OPYCC_601, "opYCC_601" },
+	/* Colorimetry based on IEC 61966-2-5 */
+	{ COLORIMETRY_OPRGB, "opRGB" },
+	/* Colorimetry based on ITU-R BT.2020 */
+	{ COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
+	/* Colorimetry based on ITU-R BT.2020 */
+	{ COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
+	/* Colorimetry based on ITU-R BT.2020 */
+	{ COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" },
+};
+
+static const struct drm_prop_enum_list legacy_hdmi_colorspaces[] = {
+	/* For Default case, driver will set the colorspace */
+	{ COLORIMETRY_DEFAULT, "Default" },
+	/* Standard Definition Colorimetry based on CEA 861 */
+	{ COLORIMETRY_ITU_601, "ITU_601" },
+	{ COLORIMETRY_ITU_709, "ITU_709" },
+	/* Standard Definition Colorimetry based on IEC 61966-2-4 */
+	{ COLORIMETRY_XV_YCC_601, "XV_YCC_601" },
+	/* High Definition Colorimetry based on IEC 61966-2-4 */
+	{ COLORIMETRY_XV_YCC_709, "XV_YCC_709" },
+	/* Colorimetry based on IEC 61966-2-1/Amendment 1 */
+	{ COLORIMETRY_S_YCC_601, "S_YCC_601" },
+	/* Colorimetry based on IEC 61966-2-5 [33] */
+	{ COLORIMETRY_OPYCC_601, "opYCC_601" },
+	/* Colorimetry based on IEC 61966-2-5 */
+	{ COLORIMETRY_OPRGB, "opRGB" },
+};
+
 int intel_connector_init(struct intel_connector *connector)
 {
 	struct intel_digital_connector_state *conn_state;
@@ -265,3 +307,24 @@ int intel_ddc_get_modes(struct drm_connector *connector,
 			connector->dev->mode_config.aspect_ratio_property,
 			DRM_MODE_PICTURE_ASPECT_NONE);
 }
+
+void
+intel_attach_colorspace_property(struct drm_connector *connector)
+{
+	struct drm_device *dev = connector->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+
+	if (INTEL_GEN(dev_priv) >= 10) {
+		if (!drm_mode_create_colorspace_property(connector,
+			gen10_hdmi_colorspaces,
+			ARRAY_SIZE(gen10_hdmi_colorspaces)))
+			drm_object_attach_property(&connector->base,
+				connector->colorspace_property, 0);
+	} else {
+		if (!drm_mode_create_colorspace_property(connector,
+			legacy_hdmi_colorspaces,
+			ARRAY_SIZE(legacy_hdmi_colorspaces)))
+			drm_object_attach_property(&connector->base,
+				connector->colorspace_property, 0);
+	}
+}
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 85b913e..5178a9a 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1783,6 +1783,7 @@ int intel_connector_update_modes(struct drm_connector *connector,
 void intel_attach_force_audio_property(struct drm_connector *connector);
 void intel_attach_broadcast_rgb_property(struct drm_connector *connector);
 void intel_attach_aspect_ratio_property(struct drm_connector *connector);
+void intel_attach_colorspace_property(struct drm_connector *connector);
 
 /* intel_csr.c */
 void intel_csr_ucode_init(struct drm_i915_private *);
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 97a98e1..7b7948f 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -498,6 +498,24 @@ static void intel_hdmi_set_avi_infoframe(struct intel_encoder *encoder,
 	else
 		frame.avi.colorspace = HDMI_COLORSPACE_RGB;
 
+	if (conn_state->colorspace == COLORIMETRY_DEFAULT) {
+		/* Set ITU 709 as default for HDMI */
+		frame.avi.colorimetry = COLORIMETRY_ITU_709;
+	} else if (conn_state->colorspace < COLORIMETRY_XV_YCC_601) {
+		frame.avi.colorimetry = conn_state->colorspace;
+	} else {
+		frame.avi.colorimetry = HDMI_COLORIMETRY_EXTENDED;
+		/*
+		 * Starting from extended list where COLORIMETRY_XV_YCC_601
+		 * is the first extended mode and its value is 0 as per HDMI
+		 * specification.
+		 * TODO: This needs to be extended for LSPCON implementation
+		 * as well. Will be implemented separately.
+		 */
+		frame.avi.extended_colorimetry = conn_state->colorspace -
+			COLORIMETRY_XV_YCC_601;
+	}
+
 	drm_hdmi_avi_infoframe_quant_range(&frame.avi,
 					   conn_state->connector,
 					   adjusted_mode,
@@ -2147,6 +2165,7 @@ static void intel_hdmi_destroy(struct drm_connector *connector)
 	intel_attach_force_audio_property(connector);
 	intel_attach_broadcast_rgb_property(connector);
 	intel_attach_aspect_ratio_property(connector);
+	intel_attach_colorspace_property(connector);
 	drm_connector_attach_content_type_property(connector);
 	connector->state->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE;
 
-- 
1.9.1

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Re: [Intel-gfx] [v7 1/2] drm: Add colorspace connector property

[Maarten Lankhorst]

Op 28-01-2019 om 09:44 schreef Uma Shankar:
> 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. Driver will expose the platform supported colorspaces,
> however sink supported colorspaces should be retrieved by userspace
> from EDID.
>
> 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.
>
> Signed-off-by: Uma Shankar <uma.shankar@intel.com>
> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
> ---
>  drivers/gpu/drm/drm_atomic_uapi.c |  4 ++
>  drivers/gpu/drm/drm_connector.c   | 95 +++++++++++++++++++++++++++++++++++++++
>  include/drm/drm_connector.h       | 17 +++++++
>  include/uapi/drm/drm_mode.h       | 32 +++++++++++++
>  4 files changed, 148 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;
>  	} else if (property == config->writeback_fb_id_property) {
>  		struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, 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;
>  	} else if (property == connector->scaling_mode_property) {
>  		*val = state->scaling_mode;
>  	} else if (property == connector->content_protection_property) {
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index 8475396..eafa643 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -826,6 +826,54 @@ 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)
>  
> +/* List of HDMI Colorspaces supported */
> +static const struct drm_prop_enum_list hdmi_colorspaces[] = {
> +	/* For Default case, driver will set the colorspace */
> +	{ COLORIMETRY_DEFAULT, "Default" },
> +	/* Standard Definition Colorimetry based on CEA 861 */
> +	{ COLORIMETRY_ITU_601, "ITU_601" },
> +	{ COLORIMETRY_ITU_709, "ITU_709" },
> +	/* Standard Definition Colorimetry based on IEC 61966-2-4 */
> +	{ COLORIMETRY_XV_YCC_601, "XV_YCC_601" },
> +	/* High Definition Colorimetry based on IEC 61966-2-4 */
> +	{ COLORIMETRY_XV_YCC_709, "XV_YCC_709" },
> +	/* Colorimetry based on IEC 61966-2-1/Amendment 1 */
> +	{ COLORIMETRY_S_YCC_601, "S_YCC_601" },
> +	/* Colorimetry based on IEC 61966-2-5 [33] */
> +	{ COLORIMETRY_OPYCC_601, "opYCC_601" },
> +	/* Colorimetry based on IEC 61966-2-5 */
> +	{ COLORIMETRY_OPRGB, "opRGB" },
> +	/* Colorimetry based on ITU-R BT.2020 */
> +	{ COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
> +	/* Colorimetry based on ITU-R BT.2020 */
> +	{ COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
> +	/* Colorimetry based on ITU-R BT.2020 */
> +	{ COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" },
> +};
> +
> +/* List of DP Colorspaces supported */
> +static const struct drm_prop_enum_list dp_colorspaces[] = {
> +	/* For Default case, driver will set the colorspace */
> +	{ COLORIMETRY_DEFAULT, "Default" },
> +	/* Standard Definition Colorimetry based on CEA 861 */
> +	{ COLORIMETRY_ITU_601, "ITU_601" },
> +	{ COLORIMETRY_ITU_709, "ITU_709" },
> +	/* Standard Definition Colorimetry based on IEC 61966-2-4 */
> +	{ COLORIMETRY_XV_YCC_601, "XV_YCC_601" },
> +	/* High Definition Colorimetry based on IEC 61966-2-4 */
> +	{ COLORIMETRY_XV_YCC_709, "XV_YCC_709" },
> +	/* Colorimetry based on IEC 61966-2-5 */
> +	{ COLORIMETRY_OPRGB, "opRGB" },
> +	/* DP MSA Colorimetry */
> +	{ DP_COLORIMETRY_Y_CBCR_ITU_601, "YCBCR_ITU_601" },
> +	{ DP_COLORIMETRY_Y_CBCR_ITU_709, "YCBCR_ITU_709" },
> +	{ DP_COLORIMETRY_SRGB, "sRGB" },
> +	{ DP_COLORIMETRY_RGB_WIDE_GAMUT, "RGB Wide Gamut" },
> +	{ DP_COLORIMETRY_SCRGB, "scRGB" },
> +	{ DP_COLORIMETRY_DCI_P3, "DCI-P3" },
> +	{ DP_COLORIMETRY_CUSTOM_COLOR_PROFILE, "Custom Profile" },
> +};
> +
>  /**
>   * DOC: standard connector properties
>   *
> @@ -1548,6 +1596,53 @@ 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. Driver will expose the platform supported colorspaces,
> + *     however sink supported colorspaces should be retrieved by userspace
> + *     from EDID.
> + *
> + *     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,
> +					const struct drm_prop_enum_list *props,
> +					int num_values)
> +{
> +	struct drm_device *dev = connector->dev;
> +	struct drm_property *prop;
> +
> +	prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
> +					"Colorspace",
> +					props, num_values);
> +	if (!prop)
> +		return -ENOMEM;
> +
> +	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..e32cd11 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -31,6 +31,7 @@
>  #include <drm/drm_util.h>
>  
>  #include <uapi/drm/drm_mode.h>
> +#include <drm/drm_property.h>
>  
>  struct drm_connector_helper_funcs;
>  struct drm_modeset_acquire_ctx;
> @@ -503,6 +504,13 @@ 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 +1003,12 @@ 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 +1283,9 @@ 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,
> +					const struct drm_prop_enum_list *props,
> +					int num_values);
>  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);
> diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
> index a439c2e..2bcdfcf 100644
> --- a/include/uapi/drm/drm_mode.h
> +++ b/include/uapi/drm/drm_mode.h
> @@ -210,6 +210,38 @@
>  #define DRM_MODE_CONTENT_PROTECTION_DESIRED     1
>  #define DRM_MODE_CONTENT_PROTECTION_ENABLED     2
>  
> +/*
> + * 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 COLORIMETRY_DEFAULT	0
> +/* CEA 861 Normal Colorimetry options */
> +#define COLORIMETRY_ITU_601	1
> +#define COLORIMETRY_ITU_709	2
> +/* CEA 861 Extended Colorimetry Options */
> +#define COLORIMETRY_XV_YCC_601	3
> +#define COLORIMETRY_XV_YCC_709	4
> +#define COLORIMETRY_S_YCC_601	5
> +#define COLORIMETRY_OPYCC_601	6
> +#define COLORIMETRY_OPRGB	7
> +#define COLORIMETRY_BT2020_RGB	8
> +#define COLORIMETRY_BT2020_YCC	9
> +#define COLORIMETRY_BT2020_CYCC	10
> +/* DP MSA Colorimetry Options */
> +#define DP_COLORIMETRY_Y_CBCR_ITU_601	11
> +#define DP_COLORIMETRY_Y_CBCR_ITU_709	12
> +#define	DP_COLORIMETRY_SRGB		13
> +#define	DP_COLORIMETRY_RGB_WIDE_GAMUT	14
tab vs space :)
> +#define DP_COLORIMETRY_SCRGB		15
> +#define DP_COLORIMETRY_DCI_P3		16
> +#define DP_COLORIMETRY_CUSTOM_COLOR_PROFILE	17

Since this is in UAPI, you need to prefix with DRM_MODE_

~Maarten


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Re: [Intel-gfx] [v7 2/2] drm/i915: Attach colorspace property and enable modeset

[Maarten Lankhorst]

Op 28-01-2019 om 09:44 schreef Uma Shankar:
> This patch attaches the colorspace connector property to the
> hdmi connector. Based on colorspace change, modeset will be
> triggered to switch to new colorspace.
>
> Based on colorspace property value create an infoframe
> with appropriate colorspace. This can be used to send an
> infoframe packet with proper colorspace value set which
> will help to enable wider color gamut like BT2020 on sink.
>
> This patch attaches and enables HDMI colorspace, DP will be
> taken care separately.
>
> v2: Merged the changes of creating infoframe as well to this
> patch as per Maarten's suggestion.
>
> v3: Addressed review comments from Shashank. Separated HDMI
> and DP colorspaces as suggested by Ville and Maarten.
>
> 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. Handle the default case properly.
>
> v5: Added Platform specific colorspace enums and called the
> property creation helper using the same.
>
> v6: Addressed Shashank's review comments.
>
> v7: Rebase
>
> Signed-off-by: Uma Shankar <uma.shankar@intel.com>
> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
> ---
>  drivers/gpu/drm/i915/intel_atomic.c    |  1 +
>  drivers/gpu/drm/i915/intel_connector.c | 63 ++++++++++++++++++++++++++++++++++
>  drivers/gpu/drm/i915/intel_drv.h       |  1 +
>  drivers/gpu/drm/i915/intel_hdmi.c      | 19 ++++++++++
>  4 files changed, 84 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c
> index 16263ad..76b7114 100644
> --- a/drivers/gpu/drm/i915/intel_atomic.c
> +++ b/drivers/gpu/drm/i915/intel_atomic.c
> @@ -124,6 +124,7 @@ int intel_digital_connector_atomic_check(struct drm_connector *conn,
>  	 */
>  	if (new_conn_state->force_audio != old_conn_state->force_audio ||
>  	    new_conn_state->broadcast_rgb != old_conn_state->broadcast_rgb ||
> +	    new_state->colorspace != old_state->colorspace ||
>  	    new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
>  	    new_conn_state->base.content_type != old_conn_state->base.content_type ||
>  	    new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode)
> diff --git a/drivers/gpu/drm/i915/intel_connector.c b/drivers/gpu/drm/i915/intel_connector.c
> index ee16758..114fcf2 100644
> --- a/drivers/gpu/drm/i915/intel_connector.c
> +++ b/drivers/gpu/drm/i915/intel_connector.c
> @@ -30,6 +30,48 @@
>  #include "intel_drv.h"
>  #include "i915_drv.h"
>  
> +static const struct drm_prop_enum_list gen10_hdmi_colorspaces[] = {
> +	/* For Default case, driver will set the colorspace */
> +	{ COLORIMETRY_DEFAULT, "Default" },
> +	/* Standard Definition Colorimetry based on CEA 861 */
> +	{ COLORIMETRY_ITU_601, "ITU_601" },
> +	{ COLORIMETRY_ITU_709, "ITU_709" },
> +	/* Standard Definition Colorimetry based on IEC 61966-2-4 */
> +	{ COLORIMETRY_XV_YCC_601, "XV_YCC_601" },
> +	/* High Definition Colorimetry based on IEC 61966-2-4 */
> +	{ COLORIMETRY_XV_YCC_709, "XV_YCC_709" },
> +	/* Colorimetry based on IEC 61966-2-1/Amendment 1 */
> +	{ COLORIMETRY_S_YCC_601, "S_YCC_601" },
> +	/* Colorimetry based on IEC 61966-2-5 [33] */
> +	{ COLORIMETRY_OPYCC_601, "opYCC_601" },
> +	/* Colorimetry based on IEC 61966-2-5 */
> +	{ COLORIMETRY_OPRGB, "opRGB" },
> +	/* Colorimetry based on ITU-R BT.2020 */
> +	{ COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
> +	/* Colorimetry based on ITU-R BT.2020 */
> +	{ COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
> +	/* Colorimetry based on ITU-R BT.2020 */
> +	{ COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" },
> +};
> +
> +static const struct drm_prop_enum_list legacy_hdmi_colorspaces[] = {
> +	/* For Default case, driver will set the colorspace */
> +	{ COLORIMETRY_DEFAULT, "Default" },
> +	/* Standard Definition Colorimetry based on CEA 861 */
> +	{ COLORIMETRY_ITU_601, "ITU_601" },
> +	{ COLORIMETRY_ITU_709, "ITU_709" },
> +	/* Standard Definition Colorimetry based on IEC 61966-2-4 */
> +	{ COLORIMETRY_XV_YCC_601, "XV_YCC_601" },
> +	/* High Definition Colorimetry based on IEC 61966-2-4 */
> +	{ COLORIMETRY_XV_YCC_709, "XV_YCC_709" },
> +	/* Colorimetry based on IEC 61966-2-1/Amendment 1 */
> +	{ COLORIMETRY_S_YCC_601, "S_YCC_601" },
> +	/* Colorimetry based on IEC 61966-2-5 [33] */
> +	{ COLORIMETRY_OPYCC_601, "opYCC_601" },
> +	/* Colorimetry based on IEC 61966-2-5 */
> +	{ COLORIMETRY_OPRGB, "opRGB" },
> +};
> +
>  int intel_connector_init(struct intel_connector *connector)
>  {
>  	struct intel_digital_connector_state *conn_state;
> @@ -265,3 +307,24 @@ int intel_ddc_get_modes(struct drm_connector *connector,
>  			connector->dev->mode_config.aspect_ratio_property,
>  			DRM_MODE_PICTURE_ASPECT_NONE);
>  }
> +
> +void
> +intel_attach_colorspace_property(struct drm_connector *connector)
> +{
> +	struct drm_device *dev = connector->dev;
> +	struct drm_i915_private *dev_priv = to_i915(dev);
> +
> +	if (INTEL_GEN(dev_priv) >= 10) {
> +		if (!drm_mode_create_colorspace_property(connector,
> +			gen10_hdmi_colorspaces,
> +			ARRAY_SIZE(gen10_hdmi_colorspaces)))
> +			drm_object_attach_property(&connector->base,
> +				connector->colorspace_property, 0);
> +	} else {
> +		if (!drm_mode_create_colorspace_property(connector,
> +			legacy_hdmi_colorspaces,
> +			ARRAY_SIZE(legacy_hdmi_colorspaces)))
> +			drm_object_attach_property(&connector->base,
> +				connector->colorspace_property, 0);
> +	}
> +}
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index 85b913e..5178a9a 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -1783,6 +1783,7 @@ int intel_connector_update_modes(struct drm_connector *connector,
>  void intel_attach_force_audio_property(struct drm_connector *connector);
>  void intel_attach_broadcast_rgb_property(struct drm_connector *connector);
>  void intel_attach_aspect_ratio_property(struct drm_connector *connector);
> +void intel_attach_colorspace_property(struct drm_connector *connector);
>  
>  /* intel_csr.c */
>  void intel_csr_ucode_init(struct drm_i915_private *);
> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
> index 97a98e1..7b7948f 100644
> --- a/drivers/gpu/drm/i915/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> @@ -498,6 +498,24 @@ static void intel_hdmi_set_avi_infoframe(struct intel_encoder *encoder,
>  	else
>  		frame.avi.colorspace = HDMI_COLORSPACE_RGB;
>  
> +	if (conn_state->colorspace == COLORIMETRY_DEFAULT) {
> +		/* Set ITU 709 as default for HDMI */
> +		frame.avi.colorimetry = COLORIMETRY_ITU_709;
> +	} else if (conn_state->colorspace < COLORIMETRY_XV_YCC_601) {
> +		frame.avi.colorimetry = conn_state->colorspace;
> +	} else {
> +		frame.avi.colorimetry = HDMI_COLORIMETRY_EXTENDED;
> +		/*
> +		 * Starting from extended list where COLORIMETRY_XV_YCC_601
> +		 * is the first extended mode and its value is 0 as per HDMI
> +		 * specification.
> +		 * TODO: This needs to be extended for LSPCON implementation
> +		 * as well. Will be implemented separately.
> +		 */

Just to clarify, there is no way to set the property for LSPCON currently I hope?

Else we should at least reject it..

> +		frame.avi.extended_colorimetry = conn_state->colorspace -
> +			COLORIMETRY_XV_YCC_601;
> +	}
> +
>  	drm_hdmi_avi_infoframe_quant_range(&frame.avi,
>  					   conn_state->connector,
>  					   adjusted_mode,
> @@ -2147,6 +2165,7 @@ static void intel_hdmi_destroy(struct drm_connector *connector)
>  	intel_attach_force_audio_property(connector);
>  	intel_attach_broadcast_rgb_property(connector);
>  	intel_attach_aspect_ratio_property(connector);
> +	intel_attach_colorspace_property(connector);
>  	drm_connector_attach_content_type_property(connector);
>  	connector->state->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE;
>  

This patch was acked-by Jani Nikula <jani.nikula@linux.intel.com> for merging through drm-misc, so waiting for new version with 1/2 fixed, then looks ready. :)

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RE: [Intel-gfx] [v7 1/2] drm: Add colorspace connector property

[Shankar, Uma]

>-----Original Message-----
>From: Maarten Lankhorst [mailto:maarten.lankhorst@linux.intel.com]
>Sent: Tuesday, January 29, 2019 5:54 PM
>To: Shankar, Uma <uma.shankar@intel.com>; intel-gfx@lists.freedesktop.org;
>dri-devel@lists.freedesktop.org
>Cc: Syrjala, Ville <ville.syrjala@intel.com>; Lankhorst, Maarten
><maarten.lankhorst@intel.com>
>Subject: Re: [Intel-gfx] [v7 1/2] drm: Add colorspace connector property
>
>Op 28-01-2019 om 09:44 schreef Uma Shankar:
>> 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. Driver will expose the platform supported colorspaces,
>> however sink supported colorspaces should be retrieved by userspace
>> from EDID.
>>
>> 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.
>>
>> Signed-off-by: Uma Shankar <uma.shankar@intel.com>
>> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
>> ---
>>  drivers/gpu/drm/drm_atomic_uapi.c |  4 ++
>>  drivers/gpu/drm/drm_connector.c   | 95
>+++++++++++++++++++++++++++++++++++++++
>>  include/drm/drm_connector.h       | 17 +++++++
>>  include/uapi/drm/drm_mode.h       | 32 +++++++++++++
>>  4 files changed, 148 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;
>>  	} else if (property == config->writeback_fb_id_property) {
>>  		struct drm_framebuffer *fb = drm_framebuffer_lookup(dev,
>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;
>>  	} else if (property == connector->scaling_mode_property) {
>>  		*val = state->scaling_mode;
>>  	} else if (property == connector->content_protection_property) {
>> diff --git a/drivers/gpu/drm/drm_connector.c
>> b/drivers/gpu/drm/drm_connector.c index 8475396..eafa643 100644
>> --- a/drivers/gpu/drm/drm_connector.c
>> +++ b/drivers/gpu/drm/drm_connector.c
>> @@ -826,6 +826,54 @@ 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)
>>
>> +/* List of HDMI Colorspaces supported */ static const struct
>> +drm_prop_enum_list hdmi_colorspaces[] = {
>> +	/* For Default case, driver will set the colorspace */
>> +	{ COLORIMETRY_DEFAULT, "Default" },
>> +	/* Standard Definition Colorimetry based on CEA 861 */
>> +	{ COLORIMETRY_ITU_601, "ITU_601" },
>> +	{ COLORIMETRY_ITU_709, "ITU_709" },
>> +	/* Standard Definition Colorimetry based on IEC 61966-2-4 */
>> +	{ COLORIMETRY_XV_YCC_601, "XV_YCC_601" },
>> +	/* High Definition Colorimetry based on IEC 61966-2-4 */
>> +	{ COLORIMETRY_XV_YCC_709, "XV_YCC_709" },
>> +	/* Colorimetry based on IEC 61966-2-1/Amendment 1 */
>> +	{ COLORIMETRY_S_YCC_601, "S_YCC_601" },
>> +	/* Colorimetry based on IEC 61966-2-5 [33] */
>> +	{ COLORIMETRY_OPYCC_601, "opYCC_601" },
>> +	/* Colorimetry based on IEC 61966-2-5 */
>> +	{ COLORIMETRY_OPRGB, "opRGB" },
>> +	/* Colorimetry based on ITU-R BT.2020 */
>> +	{ COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
>> +	/* Colorimetry based on ITU-R BT.2020 */
>> +	{ COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
>> +	/* Colorimetry based on ITU-R BT.2020 */
>> +	{ COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" }, };
>> +
>> +/* List of DP Colorspaces supported */ static const struct
>> +drm_prop_enum_list dp_colorspaces[] = {
>> +	/* For Default case, driver will set the colorspace */
>> +	{ COLORIMETRY_DEFAULT, "Default" },
>> +	/* Standard Definition Colorimetry based on CEA 861 */
>> +	{ COLORIMETRY_ITU_601, "ITU_601" },
>> +	{ COLORIMETRY_ITU_709, "ITU_709" },
>> +	/* Standard Definition Colorimetry based on IEC 61966-2-4 */
>> +	{ COLORIMETRY_XV_YCC_601, "XV_YCC_601" },
>> +	/* High Definition Colorimetry based on IEC 61966-2-4 */
>> +	{ COLORIMETRY_XV_YCC_709, "XV_YCC_709" },
>> +	/* Colorimetry based on IEC 61966-2-5 */
>> +	{ COLORIMETRY_OPRGB, "opRGB" },
>> +	/* DP MSA Colorimetry */
>> +	{ DP_COLORIMETRY_Y_CBCR_ITU_601, "YCBCR_ITU_601" },
>> +	{ DP_COLORIMETRY_Y_CBCR_ITU_709, "YCBCR_ITU_709" },
>> +	{ DP_COLORIMETRY_SRGB, "sRGB" },
>> +	{ DP_COLORIMETRY_RGB_WIDE_GAMUT, "RGB Wide Gamut" },
>> +	{ DP_COLORIMETRY_SCRGB, "scRGB" },
>> +	{ DP_COLORIMETRY_DCI_P3, "DCI-P3" },
>> +	{ DP_COLORIMETRY_CUSTOM_COLOR_PROFILE, "Custom Profile" }, };
>> +
>>  /**
>>   * DOC: standard connector properties
>>   *
>> @@ -1548,6 +1596,53 @@ 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. Driver will expose the platform supported colorspaces,
>> + *     however sink supported colorspaces should be retrieved by userspace
>> + *     from EDID.
>> + *
>> + *     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,
>> +					const struct drm_prop_enum_list
>*props,
>> +					int num_values)
>> +{
>> +	struct drm_device *dev = connector->dev;
>> +	struct drm_property *prop;
>> +
>> +	prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
>> +					"Colorspace",
>> +					props, num_values);
>> +	if (!prop)
>> +		return -ENOMEM;
>> +
>> +	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..e32cd11 100644
>> --- a/include/drm/drm_connector.h
>> +++ b/include/drm/drm_connector.h
>> @@ -31,6 +31,7 @@
>>  #include <drm/drm_util.h>
>>
>>  #include <uapi/drm/drm_mode.h>
>> +#include <drm/drm_property.h>
>>
>>  struct drm_connector_helper_funcs;
>>  struct drm_modeset_acquire_ctx;
>> @@ -503,6 +504,13 @@ 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 +1003,12 @@ 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 +1283,9 @@ 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,
>> +					const struct drm_prop_enum_list
>*props,
>> +					int num_values);
>>  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); diff --git
>> a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h index
>> a439c2e..2bcdfcf 100644
>> --- a/include/uapi/drm/drm_mode.h
>> +++ b/include/uapi/drm/drm_mode.h
>> @@ -210,6 +210,38 @@
>>  #define DRM_MODE_CONTENT_PROTECTION_DESIRED     1
>>  #define DRM_MODE_CONTENT_PROTECTION_ENABLED     2
>>
>> +/*
>> + * 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 COLORIMETRY_DEFAULT	0
>> +/* CEA 861 Normal Colorimetry options */
>> +#define COLORIMETRY_ITU_601	1
>> +#define COLORIMETRY_ITU_709	2
>> +/* CEA 861 Extended Colorimetry Options */
>> +#define COLORIMETRY_XV_YCC_601	3
>> +#define COLORIMETRY_XV_YCC_709	4
>> +#define COLORIMETRY_S_YCC_601	5
>> +#define COLORIMETRY_OPYCC_601	6
>> +#define COLORIMETRY_OPRGB	7
>> +#define COLORIMETRY_BT2020_RGB	8
>> +#define COLORIMETRY_BT2020_YCC	9
>> +#define COLORIMETRY_BT2020_CYCC	10
>> +/* DP MSA Colorimetry Options */
>> +#define DP_COLORIMETRY_Y_CBCR_ITU_601	11
>> +#define DP_COLORIMETRY_Y_CBCR_ITU_709	12
>> +#define	DP_COLORIMETRY_SRGB		13
>> +#define	DP_COLORIMETRY_RGB_WIDE_GAMUT	14
>tab vs space :)

Sure, will fix this.

>> +#define DP_COLORIMETRY_SCRGB		15
>> +#define DP_COLORIMETRY_DCI_P3		16
>> +#define DP_COLORIMETRY_CUSTOM_COLOR_PROFILE	17
>
>Since this is in UAPI, you need to prefix with DRM_MODE_

Ok sure, will update this. Thanks  Maarten !!!

Regards,
Uma Shankar

>~Maarten
>

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Re: [v7 2/2] drm/i915: Attach colorspace property and enable modeset

[Shankar, Uma]

>-----Original Message-----
>From: Maarten Lankhorst [mailto:maarten.lankhorst@linux.intel.com]
>Sent: Tuesday, January 29, 2019 5:56 PM
>To: Shankar, Uma <uma.shankar@intel.com>; intel-gfx@lists.freedesktop.org;
>dri-devel@lists.freedesktop.org
>Cc: Syrjala, Ville <ville.syrjala@intel.com>; Lankhorst, Maarten
><maarten.lankhorst@intel.com>
>Subject: Re: [Intel-gfx] [v7 2/2] drm/i915: Attach colorspace property and enable
>modeset
>
>Op 28-01-2019 om 09:44 schreef Uma Shankar:
>> This patch attaches the colorspace connector property to the hdmi
>> connector. Based on colorspace change, modeset will be triggered to
>> switch to new colorspace.
>>
>> Based on colorspace property value create an infoframe with
>> appropriate colorspace. This can be used to send an infoframe packet
>> with proper colorspace value set which will help to enable wider color
>> gamut like BT2020 on sink.
>>
>> This patch attaches and enables HDMI colorspace, DP will be taken care
>> separately.
>>
>> v2: Merged the changes of creating infoframe as well to this patch as
>> per Maarten's suggestion.
>>
>> v3: Addressed review comments from Shashank. Separated HDMI and DP
>> colorspaces as suggested by Ville and Maarten.
>>
>> 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. Handle the
>> default case properly.
>>
>> v5: Added Platform specific colorspace enums and called the property
>> creation helper using the same.
>>
>> v6: Addressed Shashank's review comments.
>>
>> v7: Rebase
>>
>> Signed-off-by: Uma Shankar <uma.shankar@intel.com>
>> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
>> ---
>>  drivers/gpu/drm/i915/intel_atomic.c    |  1 +
>>  drivers/gpu/drm/i915/intel_connector.c | 63
>++++++++++++++++++++++++++++++++++
>>  drivers/gpu/drm/i915/intel_drv.h       |  1 +
>>  drivers/gpu/drm/i915/intel_hdmi.c      | 19 ++++++++++
>>  4 files changed, 84 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/i915/intel_atomic.c
>> b/drivers/gpu/drm/i915/intel_atomic.c
>> index 16263ad..76b7114 100644
>> --- a/drivers/gpu/drm/i915/intel_atomic.c
>> +++ b/drivers/gpu/drm/i915/intel_atomic.c
>> @@ -124,6 +124,7 @@ int intel_digital_connector_atomic_check(struct
>drm_connector *conn,
>>  	 */
>>  	if (new_conn_state->force_audio != old_conn_state->force_audio ||
>>  	    new_conn_state->broadcast_rgb != old_conn_state->broadcast_rgb
>> ||
>> +	    new_state->colorspace != old_state->colorspace ||
>>  	    new_conn_state->base.picture_aspect_ratio != old_conn_state-
>>base.picture_aspect_ratio ||
>>  	    new_conn_state->base.content_type != old_conn_state-
>>base.content_type ||
>>  	    new_conn_state->base.scaling_mode !=
>> old_conn_state->base.scaling_mode)
>> diff --git a/drivers/gpu/drm/i915/intel_connector.c
>> b/drivers/gpu/drm/i915/intel_connector.c
>> index ee16758..114fcf2 100644
>> --- a/drivers/gpu/drm/i915/intel_connector.c
>> +++ b/drivers/gpu/drm/i915/intel_connector.c
>> @@ -30,6 +30,48 @@
>>  #include "intel_drv.h"
>>  #include "i915_drv.h"
>>
>> +static const struct drm_prop_enum_list gen10_hdmi_colorspaces[] = {
>> +	/* For Default case, driver will set the colorspace */
>> +	{ COLORIMETRY_DEFAULT, "Default" },
>> +	/* Standard Definition Colorimetry based on CEA 861 */
>> +	{ COLORIMETRY_ITU_601, "ITU_601" },
>> +	{ COLORIMETRY_ITU_709, "ITU_709" },
>> +	/* Standard Definition Colorimetry based on IEC 61966-2-4 */
>> +	{ COLORIMETRY_XV_YCC_601, "XV_YCC_601" },
>> +	/* High Definition Colorimetry based on IEC 61966-2-4 */
>> +	{ COLORIMETRY_XV_YCC_709, "XV_YCC_709" },
>> +	/* Colorimetry based on IEC 61966-2-1/Amendment 1 */
>> +	{ COLORIMETRY_S_YCC_601, "S_YCC_601" },
>> +	/* Colorimetry based on IEC 61966-2-5 [33] */
>> +	{ COLORIMETRY_OPYCC_601, "opYCC_601" },
>> +	/* Colorimetry based on IEC 61966-2-5 */
>> +	{ COLORIMETRY_OPRGB, "opRGB" },
>> +	/* Colorimetry based on ITU-R BT.2020 */
>> +	{ COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
>> +	/* Colorimetry based on ITU-R BT.2020 */
>> +	{ COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
>> +	/* Colorimetry based on ITU-R BT.2020 */
>> +	{ COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" }, };
>> +
>> +static const struct drm_prop_enum_list legacy_hdmi_colorspaces[] = {
>> +	/* For Default case, driver will set the colorspace */
>> +	{ COLORIMETRY_DEFAULT, "Default" },
>> +	/* Standard Definition Colorimetry based on CEA 861 */
>> +	{ COLORIMETRY_ITU_601, "ITU_601" },
>> +	{ COLORIMETRY_ITU_709, "ITU_709" },
>> +	/* Standard Definition Colorimetry based on IEC 61966-2-4 */
>> +	{ COLORIMETRY_XV_YCC_601, "XV_YCC_601" },
>> +	/* High Definition Colorimetry based on IEC 61966-2-4 */
>> +	{ COLORIMETRY_XV_YCC_709, "XV_YCC_709" },
>> +	/* Colorimetry based on IEC 61966-2-1/Amendment 1 */
>> +	{ COLORIMETRY_S_YCC_601, "S_YCC_601" },
>> +	/* Colorimetry based on IEC 61966-2-5 [33] */
>> +	{ COLORIMETRY_OPYCC_601, "opYCC_601" },
>> +	/* Colorimetry based on IEC 61966-2-5 */
>> +	{ COLORIMETRY_OPRGB, "opRGB" },
>> +};
>> +
>>  int intel_connector_init(struct intel_connector *connector)  {
>>  	struct intel_digital_connector_state *conn_state; @@ -265,3 +307,24
>> @@ int intel_ddc_get_modes(struct drm_connector *connector,
>>  			connector->dev->mode_config.aspect_ratio_property,
>>  			DRM_MODE_PICTURE_ASPECT_NONE);
>>  }
>> +
>> +void
>> +intel_attach_colorspace_property(struct drm_connector *connector) {
>> +	struct drm_device *dev = connector->dev;
>> +	struct drm_i915_private *dev_priv = to_i915(dev);
>> +
>> +	if (INTEL_GEN(dev_priv) >= 10) {
>> +		if (!drm_mode_create_colorspace_property(connector,
>> +			gen10_hdmi_colorspaces,
>> +			ARRAY_SIZE(gen10_hdmi_colorspaces)))
>> +			drm_object_attach_property(&connector->base,
>> +				connector->colorspace_property, 0);
>> +	} else {
>> +		if (!drm_mode_create_colorspace_property(connector,
>> +			legacy_hdmi_colorspaces,
>> +			ARRAY_SIZE(legacy_hdmi_colorspaces)))
>> +			drm_object_attach_property(&connector->base,
>> +				connector->colorspace_property, 0);
>> +	}
>> +}
>> diff --git a/drivers/gpu/drm/i915/intel_drv.h
>> b/drivers/gpu/drm/i915/intel_drv.h
>> index 85b913e..5178a9a 100644
>> --- a/drivers/gpu/drm/i915/intel_drv.h
>> +++ b/drivers/gpu/drm/i915/intel_drv.h
>> @@ -1783,6 +1783,7 @@ int intel_connector_update_modes(struct
>> drm_connector *connector,  void
>> intel_attach_force_audio_property(struct drm_connector *connector);
>> void intel_attach_broadcast_rgb_property(struct drm_connector
>> *connector);  void intel_attach_aspect_ratio_property(struct
>> drm_connector *connector);
>> +void intel_attach_colorspace_property(struct drm_connector
>> +*connector);
>>
>>  /* intel_csr.c */
>>  void intel_csr_ucode_init(struct drm_i915_private *); diff --git
>> a/drivers/gpu/drm/i915/intel_hdmi.c
>> b/drivers/gpu/drm/i915/intel_hdmi.c
>> index 97a98e1..7b7948f 100644
>> --- a/drivers/gpu/drm/i915/intel_hdmi.c
>> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
>> @@ -498,6 +498,24 @@ static void intel_hdmi_set_avi_infoframe(struct
>intel_encoder *encoder,
>>  	else
>>  		frame.avi.colorspace = HDMI_COLORSPACE_RGB;
>>
>> +	if (conn_state->colorspace == COLORIMETRY_DEFAULT) {
>> +		/* Set ITU 709 as default for HDMI */
>> +		frame.avi.colorimetry = COLORIMETRY_ITU_709;
>> +	} else if (conn_state->colorspace < COLORIMETRY_XV_YCC_601) {
>> +		frame.avi.colorimetry = conn_state->colorspace;
>> +	} else {
>> +		frame.avi.colorimetry = HDMI_COLORIMETRY_EXTENDED;
>> +		/*
>> +		 * Starting from extended list where COLORIMETRY_XV_YCC_601
>> +		 * is the first extended mode and its value is 0 as per HDMI
>> +		 * specification.
>> +		 * TODO: This needs to be extended for LSPCON implementation
>> +		 * as well. Will be implemented separately.
>> +		 */
>
>Just to clarify, there is no way to set the property for LSPCON currently I hope?
>
>Else we should at least reject it..

Yes, currently LSPCON support is not there. Will add that later as described in TODO.
Will not register this property if lspcon as you suggested, so that no one tries to set that
on LSPCON device.

>> +		frame.avi.extended_colorimetry = conn_state->colorspace -
>> +			COLORIMETRY_XV_YCC_601;
>> +	}
>> +
>>  	drm_hdmi_avi_infoframe_quant_range(&frame.avi,
>>  					   conn_state->connector,
>>  					   adjusted_mode,
>> @@ -2147,6 +2165,7 @@ static void intel_hdmi_destroy(struct drm_connector
>*connector)
>>  	intel_attach_force_audio_property(connector);
>>  	intel_attach_broadcast_rgb_property(connector);
>>  	intel_attach_aspect_ratio_property(connector);
>> +	intel_attach_colorspace_property(connector);
>>  	drm_connector_attach_content_type_property(connector);
>>  	connector->state->picture_aspect_ratio =
>HDMI_PICTURE_ASPECT_NONE;
>>
>
>This patch was acked-by Jani Nikula <jani.nikula@linux.intel.com> for merging
>through drm-misc, so waiting for new version with 1/2 fixed, then looks ready. :)

Thanks Jani and Maarten. Will re-send the series with your comments fixed.

Regards,
Uma Shankar

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Re: [Intel-gfx] [v7 1/2] drm: Add colorspace connector property

[Brian Starkey]

Hi Uma,

On Tue, Jan 29, 2019 at 01:30:43PM +0000, Shankar, Uma wrote:
> 
> 
> >-----Original Message-----
> >From: Maarten Lankhorst [mailto:maarten.lankhorst@linux.intel.com]
> >Sent: Tuesday, January 29, 2019 5:54 PM
> >To: Shankar, Uma <uma.shankar@intel.com>; intel-gfx@lists.freedesktop.org;
> >dri-devel@lists.freedesktop.org
> >Cc: Syrjala, Ville <ville.syrjala@intel.com>; Lankhorst, Maarten
> ><maarten.lankhorst@intel.com>
> >Subject: Re: [Intel-gfx] [v7 1/2] drm: Add colorspace connector property
> >
> >Op 28-01-2019 om 09:44 schreef Uma Shankar:
> >> 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. Driver will expose the platform supported colorspaces,
> >> however sink supported colorspaces should be retrieved by userspace
> >> from EDID.
> >>
> >> 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.
> >>
> >> Signed-off-by: Uma Shankar <uma.shankar@intel.com>
> >> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
> >> ---
> >>  drivers/gpu/drm/drm_atomic_uapi.c |  4 ++
> >>  drivers/gpu/drm/drm_connector.c   | 95
> >+++++++++++++++++++++++++++++++++++++++
> >>  include/drm/drm_connector.h       | 17 +++++++
> >>  include/uapi/drm/drm_mode.h       | 32 +++++++++++++
> >>  4 files changed, 148 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;
> >>  	} else if (property == config->writeback_fb_id_property) {
> >>  		struct drm_framebuffer *fb = drm_framebuffer_lookup(dev,
> >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;
> >>  	} else if (property == connector->scaling_mode_property) {
> >>  		*val = state->scaling_mode;
> >>  	} else if (property == connector->content_protection_property) {
> >> diff --git a/drivers/gpu/drm/drm_connector.c
> >> b/drivers/gpu/drm/drm_connector.c index 8475396..eafa643 100644
> >> --- a/drivers/gpu/drm/drm_connector.c
> >> +++ b/drivers/gpu/drm/drm_connector.c
> >> @@ -826,6 +826,54 @@ 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)
> >>
> >> +/* List of HDMI Colorspaces supported */ static const struct
> >> +drm_prop_enum_list hdmi_colorspaces[] = {
> >> +	/* For Default case, driver will set the colorspace */
> >> +	{ COLORIMETRY_DEFAULT, "Default" },
> >> +	/* Standard Definition Colorimetry based on CEA 861 */
> >> +	{ COLORIMETRY_ITU_601, "ITU_601" },
> >> +	{ COLORIMETRY_ITU_709, "ITU_709" },
> >> +	/* Standard Definition Colorimetry based on IEC 61966-2-4 */
> >> +	{ COLORIMETRY_XV_YCC_601, "XV_YCC_601" },
> >> +	/* High Definition Colorimetry based on IEC 61966-2-4 */
> >> +	{ COLORIMETRY_XV_YCC_709, "XV_YCC_709" },
> >> +	/* Colorimetry based on IEC 61966-2-1/Amendment 1 */
> >> +	{ COLORIMETRY_S_YCC_601, "S_YCC_601" },
> >> +	/* Colorimetry based on IEC 61966-2-5 [33] */
> >> +	{ COLORIMETRY_OPYCC_601, "opYCC_601" },
> >> +	/* Colorimetry based on IEC 61966-2-5 */
> >> +	{ COLORIMETRY_OPRGB, "opRGB" },
> >> +	/* Colorimetry based on ITU-R BT.2020 */
> >> +	{ COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
> >> +	/* Colorimetry based on ITU-R BT.2020 */
> >> +	{ COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
> >> +	/* Colorimetry based on ITU-R BT.2020 */
> >> +	{ COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" }, };
> >> +
> >> +/* List of DP Colorspaces supported */ static const struct
> >> +drm_prop_enum_list dp_colorspaces[] = {
> >> +	/* For Default case, driver will set the colorspace */
> >> +	{ COLORIMETRY_DEFAULT, "Default" },
> >> +	/* Standard Definition Colorimetry based on CEA 861 */
> >> +	{ COLORIMETRY_ITU_601, "ITU_601" },
> >> +	{ COLORIMETRY_ITU_709, "ITU_709" },
> >> +	/* Standard Definition Colorimetry based on IEC 61966-2-4 */
> >> +	{ COLORIMETRY_XV_YCC_601, "XV_YCC_601" },
> >> +	/* High Definition Colorimetry based on IEC 61966-2-4 */
> >> +	{ COLORIMETRY_XV_YCC_709, "XV_YCC_709" },
> >> +	/* Colorimetry based on IEC 61966-2-5 */
> >> +	{ COLORIMETRY_OPRGB, "opRGB" },
> >> +	/* DP MSA Colorimetry */
> >> +	{ DP_COLORIMETRY_Y_CBCR_ITU_601, "YCBCR_ITU_601" },
> >> +	{ DP_COLORIMETRY_Y_CBCR_ITU_709, "YCBCR_ITU_709" },
> >> +	{ DP_COLORIMETRY_SRGB, "sRGB" },
> >> +	{ DP_COLORIMETRY_RGB_WIDE_GAMUT, "RGB Wide Gamut" },
> >> +	{ DP_COLORIMETRY_SCRGB, "scRGB" },
> >> +	{ DP_COLORIMETRY_DCI_P3, "DCI-P3" },
> >> +	{ DP_COLORIMETRY_CUSTOM_COLOR_PROFILE, "Custom Profile" }, };
> >> +
> >>  /**
> >>   * DOC: standard connector properties
> >>   *
> >> @@ -1548,6 +1596,53 @@ 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. Driver will expose the platform supported colorspaces,
> >> + *     however sink supported colorspaces should be retrieved by userspace
> >> + *     from EDID.
> >> + *
> >> + *     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,
> >> +					const struct drm_prop_enum_list
> >*props,
> >> +					int num_values)
> >> +{
> >> +	struct drm_device *dev = connector->dev;
> >> +	struct drm_property *prop;
> >> +
> >> +	prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
> >> +					"Colorspace",
> >> +					props, num_values);
> >> +	if (!prop)
> >> +		return -ENOMEM;
> >> +
> >> +	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..e32cd11 100644
> >> --- a/include/drm/drm_connector.h
> >> +++ b/include/drm/drm_connector.h
> >> @@ -31,6 +31,7 @@
> >>  #include <drm/drm_util.h>
> >>
> >>  #include <uapi/drm/drm_mode.h>
> >> +#include <drm/drm_property.h>
> >>
> >>  struct drm_connector_helper_funcs;
> >>  struct drm_modeset_acquire_ctx;
> >> @@ -503,6 +504,13 @@ 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 +1003,12 @@ 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 +1283,9 @@ 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,
> >> +					const struct drm_prop_enum_list
> >*props,
> >> +					int num_values);
> >>  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); diff --git
> >> a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h index
> >> a439c2e..2bcdfcf 100644
> >> --- a/include/uapi/drm/drm_mode.h
> >> +++ b/include/uapi/drm/drm_mode.h
> >> @@ -210,6 +210,38 @@
> >>  #define DRM_MODE_CONTENT_PROTECTION_DESIRED     1
> >>  #define DRM_MODE_CONTENT_PROTECTION_ENABLED     2
> >>
> >> +/*
> >> + * 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 COLORIMETRY_DEFAULT	0
> >> +/* CEA 861 Normal Colorimetry options */
> >> +#define COLORIMETRY_ITU_601	1
> >> +#define COLORIMETRY_ITU_709	2
> >> +/* CEA 861 Extended Colorimetry Options */
> >> +#define COLORIMETRY_XV_YCC_601	3
> >> +#define COLORIMETRY_XV_YCC_709	4
> >> +#define COLORIMETRY_S_YCC_601	5
> >> +#define COLORIMETRY_OPYCC_601	6
> >> +#define COLORIMETRY_OPRGB	7
> >> +#define COLORIMETRY_BT2020_RGB	8
> >> +#define COLORIMETRY_BT2020_YCC	9
> >> +#define COLORIMETRY_BT2020_CYCC	10
> >> +/* DP MSA Colorimetry Options */
> >> +#define DP_COLORIMETRY_Y_CBCR_ITU_601	11
> >> +#define DP_COLORIMETRY_Y_CBCR_ITU_709	12
> >> +#define	DP_COLORIMETRY_SRGB		13
> >> +#define	DP_COLORIMETRY_RGB_WIDE_GAMUT	14
> >tab vs space :)
> 
> Sure, will fix this.
> 
> >> +#define DP_COLORIMETRY_SCRGB		15
> >> +#define DP_COLORIMETRY_DCI_P3		16
> >> +#define DP_COLORIMETRY_CUSTOM_COLOR_PROFILE	17

Sorry, I somehow missed your reply earlier in the month - but this
wasn't what I meant.

The expectation with enum properties is that the numeric values are
determined at runtime - userspace shouldn't depend on them being known
at compile-time. So, in include/uapi there shouldn't be these numeric
values.

The strings themselves effectively form the UABI, so I was wondering
if they should be defined in include/uapi, but you would be the first
to do that.

Daniel Vetter and/or Daniel Stone might have opinions on this.

Thanks,
-Brian

> >
> >Since this is in UAPI, you need to prefix with DRM_MODE_
> 
> Ok sure, will update this. Thanks  Maarten !!!
> 
> Regards,
> Uma Shankar
> 
> >~Maarten
> >
> 
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Re: [v7 1/2] drm: Add colorspace connector property

[Daniel Stone]

Hi,

On Tue, 29 Jan 2019 at 15:24, Brian Starkey <Brian.Starkey@arm.com> wrote:
> On Tue, Jan 29, 2019 at 01:30:43PM +0000, Shankar, Uma wrote:
> > >> +#define DP_COLORIMETRY_SCRGB              15
> > >> +#define DP_COLORIMETRY_DCI_P3             16
> > >> +#define DP_COLORIMETRY_CUSTOM_COLOR_PROFILE       17
>
> Sorry, I somehow missed your reply earlier in the month - but this
> wasn't what I meant.
>
> The expectation with enum properties is that the numeric values are
> determined at runtime - userspace shouldn't depend on them being known
> at compile-time. So, in include/uapi there shouldn't be these numeric
> values.
>
> The strings themselves effectively form the UABI, so I was wondering
> if they should be defined in include/uapi, but you would be the first
> to do that.
>
> Daniel Vetter and/or Daniel Stone might have opinions on this.

That's correct. The DPMS definitions are a historical aberration, and
we should not be adding any more numeric definitions of enum
properties to uABI.

They can be fixed in the kernel, but userspace must only rely on the strings.

Cheers,
Daniel
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Re: [v7 1/2] drm: Add colorspace connector property

[Shankar, Uma]

>-----Original Message-----
>From: Daniel Stone [mailto:daniel@fooishbar.org]
>Sent: Tuesday, January 29, 2019 9:24 PM
>To: Brian Starkey <Brian.Starkey@arm.com>
>Cc: Shankar, Uma <uma.shankar@intel.com>; Syrjala, Ville
><ville.syrjala@intel.com>; intel-gfx@lists.freedesktop.org; dri-
>devel@lists.freedesktop.org; nd <nd@arm.com>; Lankhorst, Maarten
><maarten.lankhorst@intel.com>
>Subject: Re: [Intel-gfx] [v7 1/2] drm: Add colorspace connector property
>
>Hi,
>
>On Tue, 29 Jan 2019 at 15:24, Brian Starkey <Brian.Starkey@arm.com> wrote:
>> On Tue, Jan 29, 2019 at 01:30:43PM +0000, Shankar, Uma wrote:
>> > >> +#define DP_COLORIMETRY_SCRGB              15
>> > >> +#define DP_COLORIMETRY_DCI_P3             16
>> > >> +#define DP_COLORIMETRY_CUSTOM_COLOR_PROFILE       17
>>
>> Sorry, I somehow missed your reply earlier in the month - but this
>> wasn't what I meant.
>>
>> The expectation with enum properties is that the numeric values are
>> determined at runtime - userspace shouldn't depend on them being known
>> at compile-time. So, in include/uapi there shouldn't be these numeric
>> values.
>>
>> The strings themselves effectively form the UABI, so I was wondering
>> if they should be defined in include/uapi, but you would be the first
>> to do that.
>>
>> Daniel Vetter and/or Daniel Stone might have opinions on this.
>
>That's correct. The DPMS definitions are a historical aberration, and we should
>not be adding any more numeric definitions of enum properties to uABI.
>
>They can be fixed in the kernel, but userspace must only rely on the strings.

Ok so if I understand correctly, we should drop the changes in uapi header for
macro definitions and let the userspace match string which are supported in
enum as part of property creation. So this info is redundant and not to be relied upon.

Regards,
Uma Shankar

>Cheers,
>Daniel
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