[PATCH 01/16] drm/i915/dp: Update Comment for Valid DSC Slices per Line

[Kandpal, Suraj]

> -----Original Message-----
> From: Nautiyal, Ankit K <ankit.k.nautiyal at intel.com>
> Sent: Monday, October 21, 2024 6:04 PM
> To: intel-gfx at lists.freedesktop.org
> Cc: intel-xe at lists.freedesktop.org; Kandpal, Suraj
> <suraj.kandpal at intel.com>
> Subject: [PATCH 01/16] drm/i915/dp: Update Comment for Valid DSC Slices
> per Line
> 
> For some platforms, the maximum slices per DSC engine is 4, while for
> others it is 2. Update the comment to reflect this and clarify that the
> 'valid_dsc_slicecount' list represents the valid number of slices per pipe.
> 
> Currently, we are working with 1, and 2 slices per DSC engine, which works
> for all platforms. With this the number of slices per pipe can be 1,2 or 4
> with different slice & DSC engine configuration.
> 
> Add a #TODO for adding support for 4 slices per DSC engine where
> supported.

LGTM,
Reviewed-by: Suraj Kandpal <suraj.kandpal at intel.com>

> 
> Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_dp.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
> b/drivers/gpu/drm/i915/display/intel_dp.c
> index 7e04913bc2ff..286b272aa98c 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -108,8 +108,14 @@
>  /* Constants for DP DSC configurations */  static const u8 valid_dsc_bpp[] =
> {6, 8, 10, 12, 15};
> 
> -/* With Single pipe configuration, HW is capable of supporting maximum
> - * of 4 slices per line.
> +/*
> + * With Single pipe configuration, HW is capable of supporting maximum
> of:
> + * 2 slices per line for ICL, BMG
> + * 4 slices per line for other platforms.
> + * For now consider a max of 2 slices per line, which works for all
> platforms.
> + * With this we can have max of 4 DSC Slices per pipe.
> + *
> + * #TODO Split this better to use 4 slices/dsc engine where supported.
>   */
>  static const u8 valid_dsc_slicecount[] = {1, 2, 4};
> 
> --
> 2.45.2