[PATCH v2 08/16] drm/i915/ddi: enable 128b/132b TRANS_DDI_FUNC_CTL mode for UHBR SST

[Imre Deak]

On Thu, Dec 19, 2024 at 11:33:57PM +0200, Jani Nikula wrote:
> 128b/132b SST needs 128b/132b mode enabled in the TRANS_DDI_FUNC_CTL
> register.
> 
> This is preparation for enabling 128b/132b SST. This path is not
> reachable yet.
> 
> v2: Use the MST path instead of SST to also set transport select (Imre)
> 
> Signed-off-by: Jani Nikula <jani.nikula at intel.com>

Reviewed-by: Imre Deak <imre.deak at intel.com>

> ---
>  drivers/gpu/drm/i915/display/intel_ddi.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
> index 4f9c50996446..ce34a619d48a 100644
> --- a/drivers/gpu/drm/i915/display/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
> @@ -561,7 +561,8 @@ intel_ddi_transcoder_func_reg_val_get(struct intel_encoder *encoder,
>  	} else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_ANALOG)) {
>  		temp |= TRANS_DDI_MODE_SELECT_FDI_OR_128B132B;
>  		temp |= (crtc_state->fdi_lanes - 1) << 1;
> -	} else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST)) {
> +	} else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST) ||
> +		   intel_dp_is_uhbr(crtc_state)) {
>  		if (intel_dp_is_uhbr(crtc_state))
>  			temp |= TRANS_DDI_MODE_SELECT_FDI_OR_128B132B;
>  		else
> -- 
> 2.39.5
>