[PATCH 12/15] drm/i915/dp: Simplify helper to get slice count with joiner

[Ville Syrjälä]

On Thu, Sep 26, 2024 at 12:56:35PM +0530, Ankit Nautiyal wrote:
> From: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>
> 
> When bigjoiner is used, we need at least 2 dsc slices per pipe.
> Modify the condition in intel_dp_dsc_get_slice_count() to reflect the
> same.
> 
> Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>
> Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>

Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> ---
>  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 a0afb4991334..eb92fda21e87 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -999,8 +999,12 @@ u8 intel_dp_dsc_get_slice_count(const struct intel_connector *connector,
>  		    drm_dp_dsc_sink_max_slice_count(connector->dp.dsc_dpcd, false))
>  			break;
>  
> -		/* big joiner needs small joiner to be enabled */
> -		if (num_joined_pipes == 2 && test_slice_count < 4)
> +		 /*
> +		  * Bigjoiner needs small joiner to be enabled.
> +		  * So there should be at least 2 dsc slices per pipe,
> +		  * whenever bigjoiner is enabled.
> +		  */
> +		if (num_joined_pipes > 1 && valid_dsc_slicecount[i] < 2)
>  			continue;
>  
>  		if (min_slice_count <= test_slice_count)
> -- 
> 2.45.2

-- 
Ville Syrjälä
Intel