[PATCH 22/33] drm/amd/display: Keep PHY active for DP displays on DCN31
Alan Liu
HaoPing.Liu at amd.com
Wed Jul 12 17:11:26 UTC 2023
From: Nicholas Kazlauskas <nicholas.kazlauskas at amd.com>
[Why & How]
Port of a change that went into DCN314 to keep the PHY enabled
when we have a connected and active DP display.
The PHY can hang if PHY refclk is disabled inadvertently.
Cc: Mario Limonciello <mario.limonciello at amd.com>
Cc: Alex Deucher <alexander.deucher at amd.com>
Cc: stable at vger.kernel.org
Reviewed-by: Josip Pavic <josip.pavic at amd.com>
Acked-by: Alan Liu <haoping.liu at amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas at amd.com>
---
drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_clk_mgr.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_clk_mgr.c
index 7ccd96959256..3db4ef564b99 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_clk_mgr.c
@@ -87,6 +87,11 @@ static int dcn31_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++) {
--
2.34.1
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