6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mario Limonciello <mario.limonciello@xxxxxxx>
commit e7ab758741672acb21c5d841a9f0309d30e48a06 upstream.
When screen brightness is rapidly changed and PSR-SU is enabled the
display hangs on panels with this TCON even on the latest DCN 3.1.4
microcode (0x8002a81 at this time).
This was disabled previously as commit 072030b17830 ("drm/amd: Disable
PSR-SU on Parade 0803 TCON") but reverted as commit 1e66a17ce546 ("Revert
"drm/amd: Disable PSR-SU on Parade 0803 TCON"") in favor of testing for
a new enough microcode (commit cd2e31a9ab93 ("drm/amd/display: Set minimum
requirement for using PSR-SU on Phoenix")).
As hangs are still happening specifically with this TCON, disable PSR-SU
again for it until it can be root caused.
Cc: stable@xxxxxxxxxxxxxxx
Cc: aaron.ma@xxxxxxxxxxxxx
Cc: binli@xxxxxxxxx
Cc: Marc Rossi <Marc.Rossi@xxxxxxx>
Cc: Hamza Mahfooz <Hamza.Mahfooz@xxxxxxx>
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2046131
Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>
Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/display/modules/power/power_helpers.c | 2 ++
1 file changed, 2 insertions(+)
--- 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_
((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;
}
