linux-kernel - Re: [PATCH RFC 3/4] drm/i915/dp: Use the generic helper to control LTTPR transparent mode

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Message-ID: <ZyPx0917iWCeLqVA@ideak-desk.fi.intel.com>
Date: Thu, 31 Oct 2024 23:08:35 +0200
From: Imre Deak <imre.deak@...el.com>
To: Abel Vesa <abel.vesa@...aro.org>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	Karol Herbst <kherbst@...hat.com>, Lyude Paul <lyude@...hat.com>,
	Danilo Krummrich <dakr@...hat.com>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	Rodrigo Vivi <rodrigo.vivi@...el.com>,
	Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
	Tvrtko Ursulin <tursulin@...ulin.net>,
	Rob Clark <robdclark@...il.com>,
	Abhinav Kumar <quic_abhinavk@...cinc.com>,
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
	Sean Paul <sean@...rly.run>,
	Marijn Suijten <marijn.suijten@...ainline.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>,
	Johan Hovold <johan@...nel.org>, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org, nouveau@...ts.freedesktop.org,
	intel-gfx@...ts.freedesktop.org, intel-xe@...ts.freedesktop.org,
	linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org
Subject: Re: [PATCH RFC 3/4] drm/i915/dp: Use the generic helper to control
 LTTPR transparent mode

On Thu, Oct 31, 2024 at 05:12:47PM +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.
> So use the drm generic helper instead as it makes the code a bit cleaner.
> 
> Signed-off-by: Abel Vesa <abel.vesa@...aro.org>

Acked-by: Imre Deak <imre.deak@...el.com>

> ---
>  drivers/gpu/drm/i915/display/intel_dp_link_training.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
> index 397cc4ebae526a416fcda9c74f57a8f9f803ce3b..0038608d29219ff1423a649089a38980e95b87e4 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
> @@ -118,7 +118,7 @@ intel_dp_set_lttpr_transparent_mode(struct intel_dp *intel_dp, bool enable)
>  	u8 val = enable ? DP_PHY_REPEATER_MODE_TRANSPARENT :
>  			  DP_PHY_REPEATER_MODE_NON_TRANSPARENT;
>  
> -	if (drm_dp_dpcd_write(&intel_dp->aux, DP_PHY_REPEATER_MODE, &val, 1) != 1)
> +	if (drm_dp_lttpr_set_transparent_mode(&intel_dp->aux, enable) != 1)
>  		return false;
>  
>  	intel_dp->lttpr_common_caps[DP_PHY_REPEATER_MODE -
> 
> -- 
> 2.34.1
>