Need to check the offset bits for values greater than 255. Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3203 Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> --- Can we just drop this code (at least for DP)? drm_edid.c already handles this properly in get_monitor_range(). drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 32efce81a5a74..c4fc65ba6b29b 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -11300,6 +11300,13 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector, connector->display_info.monitor_range.min_vfreq = range->min_vfreq; connector->display_info.monitor_range.max_vfreq = range->max_vfreq; + if (edid->revision >= 4) { + if (data->pad2 & DRM_EDID_RANGE_OFFSET_MIN_VFREQ) + connector->display_info.monitor_range.min_vfreq += 255; + if (data->pad2 & DRM_EDID_RANGE_OFFSET_MAX_VFREQ) + connector->display_info.monitor_range.max_vfreq += 255; + } + break; } -- 2.44.0
