[PATCH] drm/amd/display: Enable ASSR in Linux DM

[Rodrigo Siqueira]

On 02/23, Stylon Wang wrote:
> ASSR implementation was already in DC and DM guarded by
> CONFIG_DRM_AMD_DC_HDCP. This patch enables ASSR if display
> declares such support in DPCD.
> 
> Signed-off-by: Stylon Wang <stylon.wang at amd.com>
> ---
>  drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
> index c1391bfb7a9b..099f43709060 100644
> --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
> +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
> @@ -1669,6 +1669,22 @@ bool perform_link_training_with_retries(
>  			msleep(delay_dp_power_up_in_ms);
>  		}
>  
> +#ifdef CONFIG_DRM_AMD_DC_HDCP
> +		if (panel_mode == DP_PANEL_MODE_EDP) {
> +			struct cp_psp *cp_psp = &stream->ctx->cp_psp;
> +
> +			if (cp_psp && cp_psp->funcs.enable_assr) {
> +				if (!cp_psp->funcs.enable_assr(cp_psp->handle, link)) {
> +					/* since eDP implies ASSR on, change panel
> +					 * mode to disable ASSR
> +					 */
> +					panel_mode = DP_PANEL_MODE_DEFAULT;
> +				}
> +			} else
> +				panel_mode = DP_PANEL_MODE_DEFAULT;
> +		}
> +#endif
> +
>  		dp_set_panel_mode(link, panel_mode);
>  
>  		if (link->aux_access_disabled) {
> -- 
> 2.25.1
> 

Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira at amd.com>

-- 
Rodrigo Siqueira
https://siqueira.tech
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: not available
URL: <https://lists.freedesktop.org/archives/amd-gfx/attachments/20210223/6cc3ccde/attachment.sig>