[PATCH 1/1] drm/i915/dsc: Expose dsc sink max slice count via debugfs

[Jani Nikula]

On Tue, 10 Dec 2024, Swati Sharma <swati2.sharma at intel.com> wrote:
> Expose dsc sink max slice count via i915_dsc_fec_support debugfs.
> This debugfs entry is required in cases, where sink doesn't support
> minimum of 8 slices in case of ultrajoiner and minimum of 4 slices
> in case of big joiner.
>
> Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/3387
> Signed-off-by: Swati Sharma <swati2.sharma at intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_display_debugfs.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> index 3eb7565cd83c..4823d27cafb5 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> @@ -1013,6 +1013,12 @@ static int i915_dsc_fec_support_show(struct seq_file *m, void *data)
>  								      DP_DSC_YCbCr444)));
>  		seq_printf(m, "DSC_Sink_BPP_Precision: %d\n",
>  			   drm_dp_dsc_sink_bpp_incr(connector->dp.dsc_dpcd));
> +		if (intel_dp_is_edp(intel_dp))
> +			seq_printf(m, "DSC_Sink_Max_Slice_Count: %d\n",
> +				   drm_dp_dsc_sink_max_slice_count((connector->dp.dsc_dpcd), true));
> +		else
> +			seq_printf(m, "DSC_Sink_Max_Slice_Count: %d\n",
> +				   drm_dp_dsc_sink_max_slice_count((connector->dp.dsc_dpcd), false));

Maybe just use intel_dp_is_edp() as the parameter to
drm_dp_dsc_sink_max_slice_count() instead of duplicating the whole
statement?

BR,
Jani.


>  		seq_printf(m, "Force_DSC_Enable: %s\n",
>  			   str_yes_no(intel_dp->force_dsc_en));
>  		if (!intel_dp_is_edp(intel_dp))

-- 
Jani Nikula, Intel