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UPSTREAM: drm/edid: Clear the old cea_rev when there's no CEA extension in the new EDID

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It's not a good idea to leave stale cea_rev in the drm_display_info. The
current EDID might not even have a CEA ext block in which case we'd end
up leaving the stale value in place.

Change-Id: I57e2bd4a92ddcab8c8f345c5e7e251cfa1fbd231
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1475070703-6435-8-git-send-email-ville.syrjala@linux.intel.com
Signed-off-by: Zheng Yang <zhengyang@rock-chips.com>
(cherry picked from commit 011acce285)
This commit is contained in:
Ville Syrjälä 2016-09-28 16:51:40 +03:00 • committed by Zheng Yang
commit eec15bd5b9
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/drm_edid.c
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@ -4190,6 +4190,7 @@ static void drm_add_display_info(struct drm_connector *connector,
/* driver figures it out in this case */
info->bpc = 0;
info->color_formats = 0;
info->cea_rev = 0;
if (edid->revision < 3)
return;