linux-kernel - Re: [PATCH v8 2/3] drm/msm/dpu: allow using two SSPP blocks for a single plane

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Message-ID: <tynudqtodz46ti2j6paivfmvczijokhqiqxh3c2hy5ujdyuuzv@t627uosi3fhp>
Date: Sun, 15 Dec 2024 14:42:41 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: 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>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
	freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 2/3] drm/msm/dpu: allow using two SSPP blocks for a
 single plane

On Sun, Dec 15, 2024 at 02:40:17PM +0200, Dmitry Baryshkov wrote:
> Virtual wide planes give high amount of flexibility, but it is not
> always enough:
> 
> In parallel multirect case only the half of the usual width is supported
> for tiled formats. Thus the whole width of two tiled multirect
> rectangles can not be greater than max_linewidth, which is not enough
> for some platforms/compositors.
> 
> Another example is as simple as wide YUV plane. YUV planes can not use
> multirect, so currently they are limited to max_linewidth too.
> 
> Now that the planes are fully virtualized, add support for allocating
> two SSPP blocks to drive a single DRM plane. This fixes both mentioned
> cases and allows all planes to go up to 2*max_linewidth (at the cost of
> making some of the planes unavailable to the user).
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 144 ++++++++++++++++++++----------
>  1 file changed, 98 insertions(+), 46 deletions(-)

And I forgot to pick up the tag from the previous iteration:

Reviewed-by: Abhinav Kumar <quic_abhinavk@...cinc.com>


-- 
With best wishes
Dmitry