[Intel-gfx] [PATCH 2/2] drm/i915/display/dsc: Set BPP in the kernel

[Kulkarni, Vandita]

> -----Original Message-----
> From: Patnana, Venkata Sai <venkata.sai.patnana at intel.com>
> Sent: Friday, June 25, 2021 3:39 PM
> To: intel-gfx at lists.freedesktop.org
> Cc: Patnana, Venkata Sai <venkata.sai.patnana at intel.com>; Srivatsa, Anusha
> <anusha.srivatsa at intel.com>; Kulkarni, Vandita
> <vandita.kulkarni at intel.com>; Navare, Manasi D
> <manasi.d.navare at intel.com>
> Subject: [PATCH 2/2] drm/i915/display/dsc: Set BPP in the kernel
> 
> From: Anusha Srivatsa <anusha.srivatsa at intel.com>
> 
> Set compress BPP in kernel while connector DP or eDP
> 
> Cc: Vandita Kulkarni <vandita.kulkarni at intel.com>
> Cc: Navare Manasi D <manasi.d.navare at intel.com>
> Signed-off-by: Anusha Srivatsa <anusha.srivatsa at intel.com>
> Signed-off-by: Patnana Venkata Sai <venkata.sai.patnana at intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_dp.c | 23 ++++++++++++++++++-----
>  1 file changed, 18 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
> b/drivers/gpu/drm/i915/display/intel_dp.c
> index f74f70691247b..a454ee4210866 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -1241,9 +1241,15 @@ static int intel_dp_dsc_compute_config(struct
> intel_dp *intel_dp,
>  	pipe_config->lane_count = limits->max_lane_count;
> 
>  	if (intel_dp_is_edp(intel_dp)) {
> -		pipe_config->dsc.compressed_bpp =
> -			min_t(u16,
> drm_edp_dsc_sink_output_bpp(intel_dp->dsc_dpcd) >> 4,
> -			      pipe_config->pipe_bpp);
> +		if (intel_dp->force_dsc_bpp) {
> +			drm_dbg_kms(&dev_priv->drm,
> +				"DSC BPC forced to %d", intel_dp-
> >force_dsc_bpp);
Should be DSC BPP.
> +			pipe_config->dsc.compressed_bpp = intel_dp-
> >force_dsc_bpp;
> +		} else {
> +			pipe_config->dsc.compressed_bpp =
> +				min_t(u16,
> drm_edp_dsc_sink_output_bpp(intel_dp->dsc_dpcd) >> 4,
> +				pipe_config->pipe_bpp);
> +		}
>  		pipe_config->dsc.slice_count =
>  			drm_dp_dsc_sink_max_slice_count(intel_dp-
> >dsc_dpcd,
>  							true);
> @@ -1269,9 +1275,15 @@ static int intel_dp_dsc_compute_config(struct
> intel_dp *intel_dp,
>  				    "Compressed BPP/Slice Count not
> supported\n");
>  			return -EINVAL;
>  		}
> -		pipe_config->dsc.compressed_bpp = min_t(u16,
> +		if (intel_dp->force_dsc_bpp) {
> +			drm_dbg_kms(&dev_priv->drm,
> +				    "DSC BPC forced to %d\n", intel_dp-
> >force_dsc_bpp);
Same as above.
> +			pipe_config->dsc.compressed_bpp = intel_dp-
> >force_dsc_bpp;
> +		} else {
> +			pipe_config->dsc.compressed_bpp = min_t(u16,
> 
> dsc_max_output_bpp >> 4,
>  							       pipe_config-
> >pipe_bpp);
> +		}
>  		pipe_config->dsc.slice_count = dsc_dp_slice_count;
>  	}
>  	/*
> @@ -1374,7 +1386,8 @@ intel_dp_compute_link_config(struct
> intel_encoder *encoder,
>  	 * 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);
> +	drm_dbg_kms(&i915->drm, "Force DSC en = %d\n Force DSC BPP =
> %d\n",
> +		    intel_dp->force_dsc_en, intel_dp->force_dsc_bpp);
>  	if (ret || intel_dp->force_dsc_en || (DISPLAY_VER(i915) < 13 &&
>  					      pipe_config->bigjoiner)) {
>  		ret = intel_dp_dsc_compute_config(intel_dp, pipe_config,
> --
> 2.25.1