From: Kuogee Hsieh Date: Mon, 24 Jan 2022 23:17:54 +0000 (-0800) Subject: drm/msm/dp: always add fail-safe mode into connector mode list X-Git-Tag: v5.15.73~5762 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=47e2060f236667cb87b04aed98262ef5bae75c7a;p=platform%2Fkernel%2Flinux-rpi.git drm/msm/dp: always add fail-safe mode into connector mode list [ Upstream commit d4aca422539c441a7f3fec749287b36de37d9b6b ] Some of DP link compliant test expects to return fail-safe mode if prefer detailed timing mode can not be supported by mainlink's lane and rate after link training. Therefore add fail-safe mode into connector mode list as backup mode. This patch fixes test case 4.2.2.1. Changes in v2: -- add Fixes text string Fixes: 4b85d405cfe9 ( "drm/msm/dp: reduce link rate if failed at link training 1") Signed-off-by: Kuogee Hsieh Reviewed-by: Stephen Boyd Link: https://lore.kernel.org/r/1643066274-25814-1-git-send-email-quic_khsieh@quicinc.com Signed-off-by: Dmitry Baryshkov Signed-off-by: Sasha Levin --- diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c index 2181b60..5f23e6f0 100644 --- a/drivers/gpu/drm/msm/dp/dp_panel.c +++ b/drivers/gpu/drm/msm/dp/dp_panel.c @@ -212,6 +212,11 @@ int dp_panel_read_sink_caps(struct dp_panel *dp_panel, if (drm_add_modes_noedid(connector, 640, 480)) drm_set_preferred_mode(connector, 640, 480); mutex_unlock(&connector->dev->mode_config.mutex); + } else { + /* always add fail-safe mode as backup mode */ + mutex_lock(&connector->dev->mode_config.mutex); + drm_add_modes_noedid(connector, 640, 480); + mutex_unlock(&connector->dev->mode_config.mutex); } if (panel->aux_cfg_update_done) {