[Intel-gfx] [PATCH 3/6] drm/i915/psr: Enable Y-coordinate support in source

[Rodrigo Vivi]

drm/i915/cnl:....

On Wed, Mar 14, 2018 at 03:36:14PM -0700, José Roberto de Souza wrote:
> We are requiring that sink requires Y-coordinate but we are not
> sending it in the main-link.

Also add on CNL here

> Even if hardware tracking isn't good enough it will not cause
> any more issues enabling it.
> 
> Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
> ---
>  drivers/gpu/drm/i915/i915_reg.h  | 2 ++
>  drivers/gpu/drm/i915/intel_psr.c | 4 ++--
>  2 files changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index a15db41a208a..e9fc1722c0fb 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -4132,6 +4132,8 @@ enum {
>  #define EDP_PSR2_CTL			_MMIO(0x6f900)
>  #define   EDP_PSR2_ENABLE		(1<<31)
>  #define   EDP_SU_TRACK_ENABLE		(1<<30)
> +#define   EDP_Y_COORDINATE_VALID	(1<<26)
> +#define   EDP_Y_COORDINATE_ENABLE	(1<<25)

probably good add CNL_ prefix on these bits...

>  #define   EDP_MAX_SU_DISABLE_TIME(t)	((t)<<20)
>  #define   EDP_MAX_SU_DISABLE_TIME_MASK	(0x1f<<20)
>  #define   EDP_PSR2_TP2_TIME_500		(0<<8)
> diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
> index 62d97d5576d1..c9da1390a727 100644
> --- a/drivers/gpu/drm/i915/intel_psr.c
> +++ b/drivers/gpu/drm/i915/intel_psr.c
> @@ -416,8 +416,8 @@ static void hsw_activate_psr2(struct intel_dp *intel_dp)
>  	/* FIXME: selective update is probably totally broken because it doesn't
>  	 * mesh at all with our frontbuffer tracking. And the hw alone isn't
>  	 * good enough. */
> -	val |= EDP_PSR2_ENABLE |
> -		EDP_SU_TRACK_ENABLE;
> +	val |= EDP_PSR2_ENABLE | EDP_SU_TRACK_ENABLE;
> +	val |= EDP_Y_COORDINATE_VALID | EDP_Y_COORDINATE_ENABLE;

if (INTEL_GEN(dev_priv) >= 10)
	val |= EDP_Y_COORDINATE_VALID | EDP_Y_COORDINATE_ENABLE;

since those bits were reserved before CNL.

With those changes:

Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>

>  
>  	if (drm_dp_dpcd_readb(&intel_dp->aux,
>  				DP_SYNCHRONIZATION_LATENCY_IN_SINK,
> -- 
> 2.16.2
>