linux-kernel - Re: [PATCH 7/8] drm/msm/dpu: link DSPP_2/

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Message-ID: <2e7ijil4v3wxzi7y2gsbyhh4o3vrhcbydcpzfcniij6cack3yf@wb2s2m7xet6a>
Date: Tue, 17 Dec 2024 12:38:17 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Johan Hovold <johan@...nel.org>
Cc: Rob Clark <robdclark@...il.com>, 
	Abhinav Kumar <quic_abhinavk@...cinc.com>, Sean Paul <sean@...rly.run>, 
	Marijn Suijten <marijn.suijten@...ainline.org>, David Airlie <airlied@...il.com>, 
	Simona Vetter <simona@...ll.ch>, Robert Foss <rfoss@...nel.org>, 
	Neil Armstrong <neil.armstrong@...aro.org>, Abel Vesa <abel.vesa@...aro.org>, 
	Richard Acayan <mailingradian@...il.com>, Rob Clark <robdclark@...omium.org>, 
	linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 7/8] drm/msm/dpu: link DSPP_2/_3 blocks on X1E80100

On Tue, Dec 17, 2024 at 09:41:44AM +0100, Johan Hovold wrote:
> On Mon, Dec 16, 2024 at 10:27:28AM +0200, Dmitry Baryshkov wrote:
> > Link DSPP_2 to the LM_2 and DSPP_3 to the LM_3 mixer blocks.
> 
> Please say something about why you're doing this and what the expected
> outcome of doing so is.
> 
> There is currently no way for a third party (e.g. stable or distro
> maintainer) to determine what this patch does, if it needs to be
> backported or if it's essentially just a clean up like Abhinav indicated
> in one of his replies.

These patches allow using colour transformation matrix (aka night mode)
with more outputs at the same time. I think at this point only CrOS
compositor actually uses CTM, so these changes do not need to be
backported. However they are not cleanups, it was a feedback for the
SM6150 patch for the reasons expressed in the Abhinav's email.

> 
> > Fixes: e3b1f369db5a ("drm/msm/dpu: Add X1E80100 support")
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> 
> Johan

-- 
With best wishes
Dmitry