diff mbox series

[L,1/1] drm/amd/display: Keep PHY active for dp config

Message ID 20230726060926.26581-2-aaron.ma@canonical.com
State New
Headers show
Series Fix AMD gpu hang when screen off/on | expand

Commit Message

Aaron Ma July 26, 2023, 6:09 a.m. UTC 
From: Agustin Gutierrez <agustin.gutierrez@amd.com>

BugLink: https://bugs.launchpad.net/bugs/2028740

[Why]
Current hotplug sequence causes temporary hang at the re-entry of the
optimized power state.

[How]
Keep a PHY active when detecting DP signal + DPMS active

Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Agustin Gutierrez <agustin.gutierrez@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 2b02d746c1818baf741f4eeeff9b97ab4b81e1cf)
Signed-off-by: Aaron Ma <aaron.ma@canonical.com>
---
 .../gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c   | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c
index 20a06c04e4a1..e43b4d7dc60e 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c
@@ -108,6 +108,11 @@  static int dcn314_get_active_display_cnt_wa(
 				stream->signal == SIGNAL_TYPE_DVI_SINGLE_LINK ||
 				stream->signal == SIGNAL_TYPE_DVI_DUAL_LINK)
 			tmds_present = true;
+
+		/* Checking stream / link detection ensuring that PHY is active*/
+		if (dc_is_dp_signal(stream->signal) && !stream->dpms_off)
+			display_count++;
+
 	}
 
 	for (i = 0; i < dc->link_count; i++) {