[Intel-gfx] [PATCH] drm/i915: remove pixel doubled HDMI modes from valid modes list

[clinton.a.taylor at intel.com]

From: Clint Taylor <clinton.a.taylor at intel.com>

Intel HDMI does not correctly configure pixel replicated HDMI modes
480i and 576i. Remove support for these modes until DRM has been
changed to correctly identify SD interlaced modes by reporting there
true horizontal resolution 720 instead of the pre-pixel doubled 1440.

Signed-off-by: Clint Taylor <clinton.a.taylor at intel.com>
---
 drivers/gpu/drm/i915/intel_hdmi.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 5f47d35..ab32523 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -873,6 +873,9 @@ intel_hdmi_mode_valid(struct drm_connector *connector,
 	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 		return MODE_NO_DBLESCAN;
 
+	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
+		return MODE_NO_INTERLACE;
+
 	return MODE_OK;
 }
 
-- 
1.7.9.5