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

[Rodrigo Siqueira]

Applied to amd-staging-drm-next.

Thanks

On 02/23, Rodrigo Siqueira wrote:
> 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



-- 
Rodrigo Siqueira
https://siqueira.tech
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