[Intel-gfx] [PATCH] drm/i915/tgl: Enabling DSC on Pipe A for TGL

[Manasi Navare]

On Thu, Aug 22, 2019 at 05:46:55PM -0700, Madhumitha Tolakanahalli Pradeep wrote:
> DSC was not supported on Pipe A for previous platforms. Tigerlake onwards,
> all the pipes support DSC. Hence, the DSC and FEC restriction on
> Pipe A needs to be removed.
> 
> v2: Changes in the logic around removing the restriction around
>     Pipe A (Manasi, Lucas)
> 
> Cc: Manasi Navare <manasi.d.navare at intel.com>
> Signed-off-by: Madhumitha Tolakanahalli Pradeep <madhumitha.tolakanahalli.pradeep at intel.com>

Looks good to me

Reviewed-by: Manasi Navare <manasi.d.navare at intel.com>

Manasi

> ---
>  drivers/gpu/drm/i915/display/intel_dp.c | 21 +++++++++++++++++----
>  1 file changed, 17 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index 4884c87c8ed7..e2c8fe274c84 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -1739,8 +1739,14 @@ static bool intel_dp_source_supports_fec(struct intel_dp *intel_dp,
>  {
>  	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
>  
> -	return INTEL_GEN(dev_priv) >= 11 &&
> -		pipe_config->cpu_transcoder != TRANSCODER_A;
> +	/* On TGL, FEC is supported on all Pipes */
> +	if (INTEL_GEN(dev_priv) >= 12)
> +		return true;
> +
> +	if (IS_GEN(dev_priv, 11) && pipe_config->cpu_transcoder != TRANSCODER_A)
> +		return true;
> +
> +	return false;
>  }
>  
>  static bool intel_dp_supports_fec(struct intel_dp *intel_dp,
> @@ -1755,8 +1761,15 @@ static bool intel_dp_source_supports_dsc(struct intel_dp *intel_dp,
>  {
>  	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
>  
> -	return INTEL_GEN(dev_priv) >= 10 &&
> -		pipe_config->cpu_transcoder != TRANSCODER_A;
> +	/* On TGL, DSC is supported on all Pipes */
> +	if (INTEL_GEN(dev_priv) >= 12)
> +		return true;
> +
> +	if (INTEL_GEN(dev_priv) >= 10 &&
> +	    pipe_config->cpu_transcoder != TRANSCODER_A)
> +		return true;
> +
> +	return false;
>  }
>  
>  static bool intel_dp_supports_dsc(struct intel_dp *intel_dp,
> -- 
> 2.17.1
>