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authorVille Syrjälä <ville.syrjala@linux.intel.com>2017-02-13 19:58:18 +0200
committerJani Nikula <jani.nikula@intel.com>2017-03-14 18:02:39 +0200
commit9c31b087348cb2b5e668261f2eee2f224b3780b5 (patch)
tree243a0da5c1b7575838f038bf26969116f106bcd0 /drivers/gpu
parent1b2e5ea0b7061be3ffdcd85918c2f428edace4ba (diff)
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drm/i915: Reject HDMI 12bpc if the sink doesn't indicate support
Check that the sink really declared 12bpc support before we enable it. This should not actually never happen since it's mandatory for HDMI sinks to support 12bpc if they support any deep color modes. But reality disagrees with the theory and there are actually sinks in the wild that violate the spec. v2: Fix the output_types check Update commit message to state that these things are in fact real Cc: stable@vger.kernel.org Cc: Nicholas Sielicki <nicholas.sielicki@gmail.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99250 Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170213175818.24958-1-ville.syrjala@linux.intel.com Reviewed-by: Shashank Sharma <shashank.sharma@intel.com> (cherry picked from commit c750bdd3e7e204cc88b32806c3864487a03cd84b) Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/i915/intel_hdmi.c24
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index ebae2bd83918..24b2fa5b6282 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1298,16 +1298,34 @@ intel_hdmi_mode_valid(struct drm_connector *connector,
static bool hdmi_12bpc_possible(struct intel_crtc_state *crtc_state)
{
- struct drm_device *dev = crtc_state->base.crtc->dev;
+ struct drm_i915_private *dev_priv =
+ to_i915(crtc_state->base.crtc->dev);
+ struct drm_atomic_state *state = crtc_state->base.state;
+ struct drm_connector_state *connector_state;
+ struct drm_connector *connector;
+ int i;
- if (HAS_GMCH_DISPLAY(to_i915(dev)))
+ if (HAS_GMCH_DISPLAY(dev_priv))
return false;
/*
* HDMI 12bpc affects the clocks, so it's only possible
* when not cloning with other encoder types.
*/
- return crtc_state->output_types == 1 << INTEL_OUTPUT_HDMI;
+ if (crtc_state->output_types != 1 << INTEL_OUTPUT_HDMI)
+ return false;
+
+ for_each_connector_in_state(state, connector, connector_state, i) {
+ const struct drm_display_info *info = &connector->display_info;
+
+ if (connector_state->crtc != crtc_state->base.crtc)
+ continue;
+
+ if ((info->edid_hdmi_dc_modes & DRM_EDID_HDMI_DC_36) == 0)
+ return false;
+ }
+
+ return true;
}
bool intel_hdmi_compute_config(struct intel_encoder *encoder,