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drm/msm/dp: always add fail-safe mode into connector mode list

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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: 4b85d405cf ( "drm/msm/dp: reduce link rate if failed at link training 1")
Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/1643066274-25814-1-git-send-email-quic_khsieh@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Kuogee Hsieh 2022-01-24 15:17:54 -08:00 committed by Dmitry Baryshkov
parent 9051d629db
commit d4aca42253
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/msm/dp/dp_panel.c
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@ -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) {