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

[Garg, Nemesa]

> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces at lists.freedesktop.org> On Behalf Of Swati
> Sharma
> Sent: Tuesday, December 10, 2024 7:36 PM
> To: intel-gfx at lists.freedesktop.org
> Cc: Nautiyal, Ankit K <ankit.k.nautiyal at intel.com>; Sharma, Swati2
> <swati2.sharma at intel.com>
> Subject: [PATCH 1/1] drm/i915/dsc: Expose dsc sink max slice count via
> debugfs
> 
> 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));

LGTM,
Reviewed-by: Nemesa Garg <nemesa.garg at intel.com>

>  		seq_printf(m, "Force_DSC_Enable: %s\n",
>  			   str_yes_no(intel_dp->force_dsc_en));
>  		if (!intel_dp_is_edp(intel_dp))
> --
> 2.25.1