Re: [PATCH v2 2/4] drm/nouveau/dp: Use the generic helper to control LTTPR transparent mode

[Lyude Paul <lyude@redhat.com>]

Reviewed-by: Lyude Paul <lyude@redhat.com>

On Wed, 2024-12-11 at 15:04 +0200, Abel Vesa wrote:
> LTTPRs operating modes are defined by the DisplayPort standard and the
> generic framework now provides a helper to switch between them, which
> is handling the explicit disabling of non-transparent mode and its
> disable->enable sequence mentioned in the DP Standard v2.0 section
> 3.6.6.1.
> 
> So use the new drm generic helper instead as it makes the code a bit
> cleaner.
> 
> Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
> ---
>  drivers/gpu/drm/nouveau/nouveau_dp.c | 17 ++---------------
>  1 file changed, 2 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/gpu/drm/nouveau/nouveau_dp.c b/drivers/gpu/drm/nouveau/nouveau_dp.c
> index bcda0105160f1450df855281e0d932606a5095dd..55691ec44abaa53c84e73358e33df1949bb1e35c 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_dp.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_dp.c
> @@ -79,21 +79,8 @@ nouveau_dp_probe_dpcd(struct nouveau_connector *nv_connector,
>  	    !drm_dp_read_lttpr_common_caps(aux, dpcd, outp->dp.lttpr.caps)) {
>  		int nr = drm_dp_lttpr_count(outp->dp.lttpr.caps);
>  
> -		if (nr) {
> -			drm_dp_dpcd_writeb(aux, DP_PHY_REPEATER_MODE,
> -						DP_PHY_REPEATER_MODE_TRANSPARENT);
> -
> -			if (nr > 0) {
> -				ret = drm_dp_dpcd_writeb(aux, DP_PHY_REPEATER_MODE,
> -							      DP_PHY_REPEATER_MODE_NON_TRANSPARENT);
> -				if (ret != 1) {
> -					drm_dp_dpcd_writeb(aux, DP_PHY_REPEATER_MODE,
> -								DP_PHY_REPEATER_MODE_TRANSPARENT);
> -				} else {
> -					outp->dp.lttpr.nr = nr;
> -				}
> -			}
> -		}
> +		if (!drm_dp_lttpr_init(aux, nr))
> +			outp->dp.lttpr.nr = nr;
>  	}
>  
>  	ret = drm_dp_read_dpcd_caps(aux, dpcd);
> 

-- 
Cheers,
 Lyude Paul (she/her)
 Software Engineer at Red Hat

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