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drm/i915: avoid full modeset when changing the color range properties

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Automatic color range selection was added in

commit 55bc60db59
Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date:   Thu Jan 17 16:31:29 2013 +0200

    drm/i915: Add "Automatic" mode for the "Broadcast RGB" property

but that removed the check to avoid a full modeset if the value is
unchanged. Unfortunately X sets all properties with their current
value at start-up, resulting in some ugly flickering which shouldn't
be there.

v2: Change old_range from bool to uint32_t, spotted by Ville.

v3: Actually git add everything ;-)

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter
2013-04-22 17:07:23 +02:00
parent e4bfff54ed
commit ae4edb8089
3 changed files with 24 additions and 0 deletions
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8
drivers/gpu/drm/i915/intel_hdmi.c
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@@ -920,6 +920,9 @@ intel_hdmi_set_property(struct drm_connector *connector,
}
if (property == dev_priv->broadcast_rgb_property) {
bool old_auto = intel_hdmi->color_range_auto;
uint32_t old_range = intel_hdmi->color_range;
switch (val) {
case INTEL_BROADCAST_RGB_AUTO:
intel_hdmi->color_range_auto = true;
@@ -935,6 +938,11 @@ intel_hdmi_set_property(struct drm_connector *connector,
default:
return -EINVAL;
}
if (old_auto == intel_hdmi->color_range_auto &&
old_range == intel_hdmi->color_range)
return 0;
goto done;
}