[PATCH] drm/amd/display: Disable PSR-SU on Parade 08-01 TCON too

[Leo Li]

On 2024-02-05 16:12, Mario Limonciello wrote:
> Stuart Hayhurst has found that both at bootup and fullscreen VA-API video
> is leading to black screens for around 1 second and kernel WARNING [1] traces
> when calling dmub_psr_enable() with Parade 08-01 TCON.
> 
> These symptoms all go away with PSR-SU disabled for this TCON, so disable
> it for now while DMUB traces [2] from the failure can be analyzed and the failure
> state properly root caused.
> 
> Cc: stable at vger.kernel.org
> Cc: Marc Rossi <Marc.Rossi at amd.com>
> Cc: Hamza Mahfooz <Hamza.Mahfooz at amd.com>
> Link: https://gitlab.freedesktop.org/drm/amd/uploads/a832dd515b571ee171b3e3b566e99a13/dmesg.log [1]
> Link: https://gitlab.freedesktop.org/drm/amd/uploads/8f13ff3b00963c833e23e68aa8116959/output.log [2]
> Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/2645
> Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>

Reviewed-by: Leo Li <sunpeng.li at amd.com>

Thanks
> ---
> ---
>   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 e304e8435fb8..477289846a0a 100644
> --- a/drivers/gpu/drm/amd/display/modules/power/power_helpers.c
> +++ b/drivers/gpu/drm/amd/display/modules/power/power_helpers.c
> @@ -841,6 +841,8 @@ bool is_psr_su_specific_panel(struct dc_link *link)
>   				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->sink_dev_id_str[1] == 0x08 && dpcd_caps->sink_dev_id_str[0] == 0x01)
> +				isPSRSUSupported = false;
>   			else if (dpcd_caps->psr_info.force_psrsu_cap == 0x1)
>   				isPSRSUSupported = true;
>   		}