From: Mario Limonciello mario.limonciello@amd.com
commit 072030b1783056b5de8b0fac5303a5e9dbc6cfde upstream.
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: stable@vger.kernel.org Cc: Sean Wang sean.ns.wang@amd.com Cc: Marc Rossi Marc.Rossi@amd.com Cc: Hamza Mahfooz Hamza.Mahfooz@amd.com Suggested-by: Tsung-hua (Ryan) Lin Tsung-hua.Lin@amd.com Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2443 Signed-off-by: Mario Limonciello mario.limonciello@amd.com Reviewed-by: Hamza Mahfooz hamza.mahfooz@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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 @@ -816,6 +816,8 @@ 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; }