From 21529764b5af098dfbdd0c21663e293652825da5 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Mon, 28 Mar 2022 17:34:23 +0300
Subject: drm/edid: fix reduced blanking support check
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Git-commit: 73091e4fb78b5d88913593012ad74a1c0ff266da
Patch-mainline: v5.19-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
The reduced blanking bit is valid only for CVT, indicated by display
range limits flags 0x04.
Cc: Ville Syrj채l채 <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrj채l채 <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
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/drm_edid.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 1b552fe54f38..13d05062d68c 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -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;
}
--
2.38.1