[Intel-gfx] [PATCH v3 40/48] drm/i915/bigjoiner: Avoid dsc_compute_config for uncompressed bigjoiner

[Navare, Manasi]

On Fri, May 07, 2021 at 07:28:12PM -0700, Matt Roper wrote:
> From: Animesh Manna <animesh.manna at intel.com>
> 
> For uncompressed big joiner DSC engine will not be used so will avoid
> compute config of DSC.
> 
> Cc: Manasi Navare <manasi.d.navare at intel.com>
> Signed-off-by: Animesh Manna <animesh.manna at intel.com>
> Signed-off-by: Clinton Taylor <Clinton.A.Taylor at intel.com>
> Signed-off-by: Matt Roper <matthew.d.roper at intel.com>

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

Manasi

> ---
>  drivers/gpu/drm/i915/display/intel_dp.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index 92d4c5ab32d7..a1a472ffef6d 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -1371,9 +1371,13 @@ intel_dp_compute_link_config(struct intel_encoder *encoder,
>  	 */
>  	ret = intel_dp_compute_link_config_wide(intel_dp, pipe_config, &limits);
>  
> -	/* enable compression if the mode doesn't fit available BW */
> +	/*
> +	 * Pipe joiner needs compression upto display12 due to BW limitation. DG2
> +	 * onwards pipe joiner can be enabled without compression.
> +	 */
>  	drm_dbg_kms(&i915->drm, "Force DSC en = %d\n", intel_dp->force_dsc_en);
> -	if (ret || intel_dp->force_dsc_en || pipe_config->bigjoiner) {
> +	if (ret || intel_dp->force_dsc_en || (DISPLAY_VER(i915) < 13 &&
> +					      pipe_config->bigjoiner)) {
>  		ret = intel_dp_dsc_compute_config(intel_dp, pipe_config,
>  						  conn_state, &limits);
>  		if (ret < 0)
> -- 
> 2.25.4
>