[PATCH] drm/amd: Disable PSR-SU on Parade 0803 TCON

[Mario Limonciello]

A number of users have reported that there are random hangs occurring
caused by PSR-SU specifically on panels that contain the parade 0803
TCON.  Users have been able to work around the issue by disabling PSR
entirely.

To avoid these hangs, disable PSR-SU when this TCON is found.

Cc: Sean Wang <sean.ns.wang at amd.com>
Cc: Marc Rossi <Marc.Rossi at amd.com>
Cc: Hamza Mahfooz <Hamza.Mahfooz at amd.com>
Suggested-by: Tsung-hua (Ryan) Lin <Tsung-hua.Lin at amd.com>
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2443
Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
---
 drivers/gpu/drm/amd/display/modules/power/power_helpers.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/modules/power/power_helpers.c b/drivers/gpu/drm/amd/display/modules/power/power_helpers.c
index 30349881a283..b9e78451a3d5 100644
--- a/drivers/gpu/drm/amd/display/modules/power/power_helpers.c
+++ b/drivers/gpu/drm/amd/display/modules/power/power_helpers.c
@@ -839,6 +839,8 @@ bool is_psr_su_specific_panel(struct dc_link *link)
 				((dpcd_caps->sink_dev_id_str[1] == 0x08 && dpcd_caps->sink_dev_id_str[0] == 0x08) ||
 				(dpcd_caps->sink_dev_id_str[1] == 0x08 && dpcd_caps->sink_dev_id_str[0] == 0x07)))
 				isPSRSUSupported = false;
+			else if (dpcd_caps->sink_dev_id_str[1] == 0x08 && dpcd_caps->sink_dev_id_str[0] == 0x03)
+				isPSRSUSupported = false;
 			else if (dpcd_caps->psr_info.force_psrsu_cap == 0x1)
 				isPSRSUSupported = true;
 		}
-- 
2.34.1