From b6d0c42794824d94a10a6599ef110d7a1c371246 Mon Sep 17 00:00:00 2001 From: Nicholas Kazlauskas Date: Mon, 18 Mar 2019 09:00:16 -0400 Subject: [PATCH] drm/amd/display: Only allow VRR when vrefresh is within supported range [Why] Black screens or artifacting can occur when enabling FreeSync outside of the supported range of the monitor. This can happen since the supported range isn't always the min/max vrefresh range available for the monitor. [How] There was previously a fix that prevented this from happening in the low range but it didn't cover the upper range. Expand the condition to include both. Cc: Sun peng Li Cc: Harry Wentland Signed-off-by: Nicholas Kazlauskas --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) 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 cde0da3ae964..73e544f645ef 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -5555,9 +5555,11 @@ static void get_freesync_config_for_crtc( struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(new_con_state->base.connector); struct drm_display_mode *mode = &new_crtc_state->base.mode; + int vrefresh = drm_mode_vrefresh(mode); new_crtc_state->vrr_supported = new_con_state->freesync_capable && - aconnector->min_vfreq <= drm_mode_vrefresh(mode); + vrefresh >= aconnector->min_vfreq && + vrefresh <= aconnector->max_vfreq; if (new_crtc_state->vrr_supported) { new_crtc_state->stream->ignore_msa_timing_param = true; -- 2.17.1