In order to use colorspace property to Display Port connectors, it extends
DRM_MODE_CONNECTOR_DisplayPort connector_type on
drm_mode_create_colorspace_property function.
v3: Addressed review comments from Ville
- Add new colorimetry options for DP 1.4a spec.
- Separate set of colorimetry enum values for DP.
v4: Add additional comments to struct drm_prop_enum_list.
Polishing an enum string of struct drm_prop_enum_list
Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@xxxxxxxxx>
Reviewed-by: Uma Shankar <uma.shankar@xxxxxxxxx>
---
drivers/gpu/drm/drm_connector.c | 46 +++++++++++++++++++++++++++++++++
include/drm/drm_connector.h | 8 ++++++
2 files changed, 54 insertions(+)
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 4c766624b20d..5834e6d330a0 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -882,6 +882,44 @@ static const struct drm_prop_enum_list hdmi_colorspaces[] = {
{ DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER, "DCI-P3_RGB_Theater" },
};
+/*
+ * As per DP 1.4a spec, 2.2.5.7.5 VSC SDP Payload for Pixel Encoding/Colorimetry
+ * Format Table 2-120
+ */
+static const struct drm_prop_enum_list dp_colorspaces[] = {
+ /* For Default case, driver will set the colorspace */
+ { DRM_MODE_COLORIMETRY_DEFAULT, "Default" },
+ /* Colorimetry based on IEC 61966-2-1 */
+ { DRM_MODE_COLORIMETRY_SRGB, "sRGB" },
+ { DRM_MODE_COLORIMETRY_WIDE_GAMUT_FIXED_POINT_RGB, "wide_gamut_fixed_point_RGB" },
+ /* Colorimetry based on IEC 61966-2-2, wide gamut floating point RGB */
+ { DRM_MODE_COLORIMETRY_SCRGB, "scRGB" },
+ { DRM_MODE_COLORIMETRY_ADOBE_RGB, "Adobe_RGB" },
+ /* Colorimetry based on SMPTE RP 431-2 */
+ { DRM_MODE_COLORIMETRY_DCP_P3_RGB, "DCI-P3_RGB" },
+ /* Colorimetry based on ITU-R BT.2020 */
+ { DRM_MODE_COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
+ { DRM_MODE_COLORIMETRY_BT601_YCC, "BT601_YCC" },
+ { DRM_MODE_COLORIMETRY_BT709_YCC, "BT709_YCC" },
+ /* 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 ITU-R BT.2020 */
+ { DRM_MODE_COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" },
+ /* Colorimetry based on ITU-R BT.2020 */
+ { DRM_MODE_COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
+ /*
+ * Colorumetry based on Digital Imaging and Communications in Medicine
+ * (DICOM) Part 14: Grayscale Standard Display Function
+ */
+ { DRM_MODE_COLORIMETRY_DICOM_PART_14_GRAYSCALE, "DICOM_Part_14_Grayscale" },
+};
+
/**
* DOC: standard connector properties
*
@@ -1710,6 +1748,14 @@ int drm_mode_create_colorspace_property(struct drm_connector *connector)
ARRAY_SIZE(hdmi_colorspaces));
if (!prop)
return -ENOMEM;
+ } else if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
+ connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
+ prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
+ "Colorspace",
+ dp_colorspaces,
+ ARRAY_SIZE(dp_colorspaces));
+ if (!prop)
+ return -ENOMEM;
} else {
DRM_DEBUG_KMS("Colorspace property not supported\n");
return 0;
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 681cb590f952..8848e5d6b0c4 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -281,6 +281,14 @@ enum drm_panel_orientation {
/* Additional Colorimetry extension added as part of CTA 861.G */
#define DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65 11
#define DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER 12
+/* Additional Colorimetry Options added for DP 1.4a VSC Colorimetry Format */
+#define DRM_MODE_COLORIMETRY_SRGB 13
+#define DRM_MODE_COLORIMETRY_WIDE_GAMUT_FIXED_POINT_RGB 14
+#define DRM_MODE_COLORIMETRY_SCRGB 15
+#define DRM_MODE_COLORIMETRY_ADOBE_RGB 16
+#define DRM_MODE_COLORIMETRY_DCP_P3_RGB 17
+#define DRM_MODE_COLORIMETRY_BT601_YCC 18
+#define DRM_MODE_COLORIMETRY_DICOM_PART_14_GRAYSCALE 19
/**
* enum drm_bus_flags - bus_flags info for &drm_display_info
--
2.23.0
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