[PATCH v5 04/13] drm/connector: Use common colorspace_names array

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We an use bitfields to track the support ones for HDMI
and DP. This allows us to print colorspaces in a consistent
manner without needing to know whether we're dealing with
DP or HDMI.

v4:
- Rename _MAX to _COUNT and leave comment to indicate
  it's not a valid value
- Fix misplaced function doc

Signed-off-by: Harry Wentland <harry.wentland@xxxxxxx>
Reviewed-by: Sebastian Wick <sebastian.wick@xxxxxxxxxx>

Cc: Pekka Paalanen <ppaalanen@xxxxxxxxx>
Cc: Sebastian Wick <sebastian.wick@xxxxxxxxxx>
Cc: Vitaly.Prosyak@xxxxxxx
Cc: Uma Shankar <uma.shankar@xxxxxxxxx>
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Joshua Ashton <joshua@xxxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
Cc: Simon Ser <contact@xxxxxxxxxxx>
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Melissa Wen <mwen@xxxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
---
 drivers/gpu/drm/drm_connector.c | 125 ++++++++++++++++++--------------
 include/drm/drm_connector.h     |   2 +
 2 files changed, 74 insertions(+), 53 deletions(-)

diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 9c087d6f5691..8d24a5da4076 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -1016,64 +1016,70 @@ static const struct drm_prop_enum_list drm_dp_subconnector_enum_list[] = {
 DRM_ENUM_NAME_FN(drm_get_dp_subconnector_name,
 		 drm_dp_subconnector_enum_list)
 
-static const struct drm_prop_enum_list hdmi_colorspaces[] = {
+
+static const char * const colorspace_names[] = {
 	/* For Default case, driver will set the colorspace */
-	{ DRM_MODE_COLORIMETRY_DEFAULT, "Default" },
+	[DRM_MODE_COLORIMETRY_DEFAULT] = "Default",
 	/* Standard Definition Colorimetry based on CEA 861 */
-	{ DRM_MODE_COLORIMETRY_SMPTE_170M_YCC, "SMPTE_170M_YCC" },
-	{ DRM_MODE_COLORIMETRY_BT709_YCC, "BT709_YCC" },
+	[DRM_MODE_COLORIMETRY_SMPTE_170M_YCC] = "SMPTE_170M_YCC",
+	[DRM_MODE_COLORIMETRY_BT709_YCC] = "BT709_YCC",
 	/* Standard Definition Colorimetry based on IEC 61966-2-4 */
-	{ DRM_MODE_COLORIMETRY_XVYCC_601, "XVYCC_601" },
+	[DRM_MODE_COLORIMETRY_XVYCC_601] = "XVYCC_601",
 	/* High Definition Colorimetry based on IEC 61966-2-4 */
-	{ DRM_MODE_COLORIMETRY_XVYCC_709, "XVYCC_709" },
+	[DRM_MODE_COLORIMETRY_XVYCC_709] = "XVYCC_709",
 	/* Colorimetry based on IEC 61966-2-1/Amendment 1 */
-	{ DRM_MODE_COLORIMETRY_SYCC_601, "SYCC_601" },
+	[DRM_MODE_COLORIMETRY_SYCC_601] = "SYCC_601",
 	/* Colorimetry based on IEC 61966-2-5 [33] */
-	{ DRM_MODE_COLORIMETRY_OPYCC_601, "opYCC_601" },
+	[DRM_MODE_COLORIMETRY_OPYCC_601] = "opYCC_601",
 	/* Colorimetry based on IEC 61966-2-5 */
-	{ DRM_MODE_COLORIMETRY_OPRGB, "opRGB" },
+	[DRM_MODE_COLORIMETRY_OPRGB] = "opRGB",
 	/* Colorimetry based on ITU-R BT.2020 */
-	{ DRM_MODE_COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" },
+	[DRM_MODE_COLORIMETRY_BT2020_CYCC] = "BT2020_CYCC",
 	/* Colorimetry based on ITU-R BT.2020 */
-	{ DRM_MODE_COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
+	[DRM_MODE_COLORIMETRY_BT2020_RGB] = "BT2020_RGB",
 	/* Colorimetry based on ITU-R BT.2020 */
-	{ DRM_MODE_COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
+	[DRM_MODE_COLORIMETRY_BT2020_YCC] = "BT2020_YCC",
 	/* 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" },
+	[DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65] = "DCI-P3_RGB_D65",
+	[DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER] = "DCI-P3_RGB_Theater",
+	[DRM_MODE_COLORIMETRY_RGB_WIDE_FIXED] = "RGB_WIDE_FIXED",
+	/* Colorimetry based on scRGB (IEC 61966-2-2) */
+	[DRM_MODE_COLORIMETRY_RGB_WIDE_FLOAT] = "RGB_WIDE_FLOAT",
+	[DRM_MODE_COLORIMETRY_BT601_YCC] = "BT601_YCC",
 };
 
+static const u32 hdmi_colorspaces =
+	BIT(DRM_MODE_COLORIMETRY_SMPTE_170M_YCC) |
+	BIT(DRM_MODE_COLORIMETRY_BT709_YCC) |
+	BIT(DRM_MODE_COLORIMETRY_XVYCC_601) |
+	BIT(DRM_MODE_COLORIMETRY_XVYCC_709) |
+	BIT(DRM_MODE_COLORIMETRY_SYCC_601) |
+	BIT(DRM_MODE_COLORIMETRY_OPYCC_601) |
+	BIT(DRM_MODE_COLORIMETRY_OPRGB) |
+	BIT(DRM_MODE_COLORIMETRY_BT2020_CYCC) |
+	BIT(DRM_MODE_COLORIMETRY_BT2020_RGB) |
+	BIT(DRM_MODE_COLORIMETRY_BT2020_YCC) |
+	BIT(DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65) |
+	BIT(DRM_MODE_COLORIMETRY_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" },
-	{ DRM_MODE_COLORIMETRY_RGB_WIDE_FIXED, "RGB_Wide_Gamut_Fixed_Point" },
-	/* Colorimetry based on scRGB (IEC 61966-2-2) */
-	{ DRM_MODE_COLORIMETRY_RGB_WIDE_FLOAT, "RGB_Wide_Gamut_Floating_Point" },
-	/* Colorimetry based on IEC 61966-2-5 */
-	{ DRM_MODE_COLORIMETRY_OPRGB, "opRGB" },
-	/* Colorimetry based on SMPTE RP 431-2 */
-	{ DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65, "DCI-P3_RGB_D65" },
-	/* 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" },
-};
+static const u32 dp_colorspaces =
+	BIT(DRM_MODE_COLORIMETRY_RGB_WIDE_FIXED) |
+	BIT(DRM_MODE_COLORIMETRY_RGB_WIDE_FLOAT) |
+	BIT(DRM_MODE_COLORIMETRY_OPRGB) |
+	BIT(DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65) |
+	BIT(DRM_MODE_COLORIMETRY_BT2020_RGB) |
+	BIT(DRM_MODE_COLORIMETRY_BT601_YCC) |
+	BIT(DRM_MODE_COLORIMETRY_BT709_YCC) |
+	BIT(DRM_MODE_COLORIMETRY_XVYCC_601) |
+	BIT(DRM_MODE_COLORIMETRY_XVYCC_709) |
+	BIT(DRM_MODE_COLORIMETRY_SYCC_601) |
+	BIT(DRM_MODE_COLORIMETRY_OPYCC_601) |
+	BIT(DRM_MODE_COLORIMETRY_BT2020_CYCC) |
+	BIT(DRM_MODE_COLORIMETRY_BT2020_YCC);
 
 /**
  * DOC: standard connector properties
@@ -1976,27 +1982,44 @@ EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
  */
 
 static int drm_mode_create_colorspace_property(struct drm_connector *connector,
-					const struct drm_prop_enum_list *colorspaces,
-					int size)
+					u32 supported_colorspaces)
 {
 	struct drm_device *dev = connector->dev;
+	u32 colorspaces = supported_colorspaces | BIT(DRM_MODE_COLORIMETRY_DEFAULT);
+	struct drm_prop_enum_list enum_list[DRM_MODE_COLORIMETRY_COUNT];
+	int i, len;
 
 	if (connector->colorspace_property)
 		return 0;
 
-	if (!colorspaces)
-		return 0;
+	if (!supported_colorspaces)
+		drm_dbg_kms(dev, "Driver is not passing supported colorspaces on [CONNECTOR:%d:%s]\n",
+			    connector->base.id, connector->name);
+
+	if ((supported_colorspaces & -BIT(DRM_MODE_COLORIMETRY_COUNT)) != 0)
+		return -EINVAL;
+
+	len = 0;
+	for (i = 0; i < DRM_MODE_COLORIMETRY_COUNT; i++) {
+		if (supported_colorspaces != 0 && (colorspaces & BIT(i)) == 0)
+			continue;
+
+		enum_list[len].type = i;
+		enum_list[len].name = colorspace_names[i];
+		len++;
+	}
 
 	connector->colorspace_property =
 		drm_property_create_enum(dev, DRM_MODE_PROP_ENUM, "Colorspace",
-					colorspaces,
-					size);
+					enum_list,
+					len);
 
 	if (!connector->colorspace_property)
 		return -ENOMEM;
 
 	return 0;
 }
+
 /**
  * drm_mode_create_hdmi_colorspace_property - create hdmi colorspace property
  * @connector: connector to create the Colorspace property on.
@@ -2009,9 +2032,7 @@ static int drm_mode_create_colorspace_property(struct drm_connector *connector,
  */
 int drm_mode_create_hdmi_colorspace_property(struct drm_connector *connector)
 {
-	return drm_mode_create_colorspace_property(connector,
-						   hdmi_colorspaces,
-						   ARRAY_SIZE(hdmi_colorspaces));
+	return drm_mode_create_colorspace_property(connector, hdmi_colorspaces);
 }
 EXPORT_SYMBOL(drm_mode_create_hdmi_colorspace_property);
 
@@ -2027,9 +2048,7 @@ EXPORT_SYMBOL(drm_mode_create_hdmi_colorspace_property);
  */
 int drm_mode_create_dp_colorspace_property(struct drm_connector *connector)
 {
-	return drm_mode_create_colorspace_property(connector,
-						   dp_colorspaces,
-						   ARRAY_SIZE(dp_colorspaces));
+	return drm_mode_create_colorspace_property(connector, dp_colorspaces);
 }
 EXPORT_SYMBOL(drm_mode_create_dp_colorspace_property);
 
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 907f40851e80..fad38cdf4f79 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -460,6 +460,8 @@ enum drm_colorspace {
 	DRM_MODE_COLORIMETRY_RGB_WIDE_FIXED	= 13,
 	DRM_MODE_COLORIMETRY_RGB_WIDE_FLOAT	= 14,
 	DRM_MODE_COLORIMETRY_BT601_YCC		= 15,
+	/* not a valid value; merely used for counting */
+	DRM_MODE_COLORIMETRY_COUNT
 };
 
 /**
-- 
2.41.0
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