From 7a69ce40aeef448338b313d7a3ee21d2baf24c94 Mon Sep 17 00:00:00 2001 From: Stylon Wang Date: Tue, 20 Jul 2021 10:58:19 +0800 Subject: [PATCH] drm/amd/display: Fix ASSR regression on embedded panels [Why] Regression found in some embedded panels traces back to the earliest upstreamed ASSR patch. The changed code flow are causing problems with some panels. [How] - Change ASSR enabling code while preserving original code flow as much as possible - Simplify the code on guarding with internal display flag Bug: https://bugzilla.kernel.org/show_bug.cgi?id=213779 Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1620 Reviewed-by: Alex Deucher Signed-off-by: Stylon Wang Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index cc62124..f56e061 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -1811,8 +1811,7 @@ bool perform_link_training_with_retries( */ panel_mode = DP_PANEL_MODE_DEFAULT; } - } else - panel_mode = DP_PANEL_MODE_DEFAULT; + } } #endif @@ -4643,7 +4642,10 @@ enum dp_panel_mode dp_get_panel_mode(struct dc_link *link) } } - if (link->dpcd_caps.panel_mode_edp) { + if (link->dpcd_caps.panel_mode_edp && + (link->connector_signal == SIGNAL_TYPE_EDP || + (link->connector_signal == SIGNAL_TYPE_DISPLAY_PORT && + link->is_internal_display))) { return DP_PANEL_MODE_EDP; } -- 2.7.4