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drm/edid: fix reduced blanking support check

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The reduced blanking bit is valid only for CVT, indicated by display
range limits flags 0x04.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/5dea5ee24065450716bbc177dd6850d3193dbeec.1648477901.git.jani.nikula@intel.com
This commit is contained in:
Jani Nikula 2022-03-28 17:34:23 +03:00
parent faacff8e6a
commit 73091e4fb7
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/drm_edid.c
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@ -2408,7 +2408,7 @@ is_rb(struct detailed_timing *t, void *data)
if (!is_display_descriptor(r, EDID_DETAIL_MONITOR_RANGE))
return;
if (r[15] & 0x10)
if (r[10] == DRM_EDID_CVT_SUPPORT_FLAG && r[15] & 0x10)
*(bool *)data = true;
}