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authorChris Wilson <chris@chris-wilson.co.uk>2011-02-22 01:23:52 +0300
committerChris Wilson <chris@chris-wilson.co.uk>2011-02-22 18:56:56 +0300
commite953fd7bb32f55309a96abd5ceba9cf68d221434 (patch)
tree67110619366878f6412405ab63b7525f1c627544 /drivers/gpu/drm/i915/intel_modes.c
parentce453d81cb0397aa7d5148984f51907e14072d74 (diff)
downloadlinux-e953fd7bb32f55309a96abd5ceba9cf68d221434.tar.xz
drm/i915: Add support for limited color range of broadcast outputs
In order to prevent "crushed blacks" on TVs, the range of the RGB output may be limited to 16-235. This used to be available through Xorg under the "Broadcast RGB" option, so reintroduce support for KMS. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=34543 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_modes.c')
-rw-r--r--drivers/gpu/drm/i915/intel_modes.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_modes.c b/drivers/gpu/drm/i915/intel_modes.c
index f70b7cf32bff..9034dd8f33c7 100644
--- a/drivers/gpu/drm/i915/intel_modes.c
+++ b/drivers/gpu/drm/i915/intel_modes.c
@@ -80,3 +80,33 @@ int intel_ddc_get_modes(struct drm_connector *connector,
return ret;
}
+
+static const char *broadcast_rgb_names[] = {
+ "Full",
+ "Limited 16:235",
+};
+
+void
+intel_attach_broadcast_rgb_property(struct drm_connector *connector)
+{
+ struct drm_device *dev = connector->dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct drm_property *prop;
+ int i;
+
+ prop = dev_priv->broadcast_rgb_property;
+ if (prop == NULL) {
+ prop = drm_property_create(dev, DRM_MODE_PROP_ENUM,
+ "Broadcast RGB",
+ ARRAY_SIZE(broadcast_rgb_names));
+ if (prop == NULL)
+ return;
+
+ for (i = 0; i < ARRAY_SIZE(broadcast_rgb_names); i++)
+ drm_property_add_enum(prop, i, i, broadcast_rgb_names[i]);
+
+ dev_priv->broadcast_rgb_property = prop;
+ }
+
+ drm_connector_attach_property(connector, prop, 0);
+}