linux-kernel - Re: [PATCH 16/45] drm/msm/dp: add support for programming p1 register block

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Message-ID: <ewwpuc3f7vqjeazgeebecc3ygrha4ujq5r7bg5cow56zzb564l@kef4v3bwo3bi>
Date: Fri, 6 Dec 2024 11:42:21 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Abhinav Kumar <quic_abhinavk@...cinc.com>
Cc: Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>, 
	Marijn Suijten <marijn.suijten@...ainline.org>, David Airlie <airlied@...il.com>, 
	Simona Vetter <simona@...ll.ch>, Stephen Boyd <swboyd@...omium.org>, 
	Chandan Uddaraju <chandanu@...eaurora.org>, Guenter Roeck <groeck@...omium.org>, 
	Kuogee Hsieh <quic_khsieh@...cinc.com>, Bjorn Andersson <andersson@...nel.org>, 
	Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Vara Reddy <quic_varar@...cinc.com>, Rob Clark <robdclark@...omium.org>, 
	Tanmay Shah <tanmay@...eaurora.org>, linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
	freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
	Jessica Zhang <quic_jesszhan@...cinc.com>, Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: Re: [PATCH 16/45] drm/msm/dp: add support for programming p1
 register block

On Thu, Dec 05, 2024 at 08:31:47PM -0800, Abhinav Kumar wrote:
> p1 register block is needed for the second mst stream.
> Add support in the catalog to be able to program this block.
> 
> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
> ---
>  drivers/gpu/drm/msm/dp/dp_catalog.c | 29 +++++++++++++++++++++++++++++
>  1 file changed, 29 insertions(+)
> 
> @@ -1137,6 +1160,12 @@ static int msm_dp_catalog_get_io(struct msm_dp_catalog_private *catalog)
>  			DRM_ERROR("unable to remap p0 region: %pe\n", dss->p0.base);
>  			return PTR_ERR(dss->p0.base);
>  		}
> +
> +		dss->p1.base = msm_dp_ioremap(pdev, 4, &dss->p1.len);
> +		if (IS_ERR(dss->p1.base)) {
> +			DRM_ERROR("unable to remap p1 region: %pe\n", dss->p1.base);
> +			return PTR_ERR(dss->p1.base);
> +		}

Forgot to mention, please also map p1 in the legacy bingdings branch in
this function.

>  	}
>  
>  	return 0;
> 
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry