drm/edid: Only parse VRR range for continuous frequency displays

Since we only use the parsed vrefresh range to determine
if VRR should be supported we should only accept continuous
frequency displays here.

Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Leo Li <sunpeng.li@amd.com>
Cc: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Cc: amd-gfx@lists.freedesktop.org
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220927170006.27855-4-ville.syrjala@linux.intel.com

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 72713fe9378be33dc9d5af49945412fda799389d..e0d8ed9bead70e5e7e7df5a148b8ac8ecbffaa34 100644 (file)
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -6072,7 +6072,10 @@ static void drm_get_monitor_range(struct drm_connector *connector,
 {
        struct drm_display_info *info = &connector->display_info;
 
-       if (!version_greater(drm_edid, 1, 1))
+       if (!version_greater(drm_edid, 1, 3))
+               return;
+
+       if (!(drm_edid->edid->features & DRM_EDID_FEATURE_CONTINUOUS_FREQ))
                return;
 
        drm_for_each_detailed_block(drm_edid, get_monitor_range,