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

[Hamza Mahfooz]

On 6/19/23 16:13, Mario Limonciello wrote:
> 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>

Reviewed-by: Hamza Mahfooz <hamza.mahfooz 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;
>   		}
-- 
Hamza