linux-kernel - Re: [PATCH v8 00/15] drm/msm/dpu: Support quad pipe with dual-DSI

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Message-ID: <CABymUCNL2FQax13vie8kqX_FpNOTZBPwKbxvKzmXHaXr2OjbAw@mail.gmail.com>
Date: Wed, 23 Apr 2025 10:50:23 +0800
From: Jun Nie <jun.nie@...aro.org>
To: Pengyu Luo <mitltlatltl@...il.com>
Cc: airlied@...il.com, dmitry.baryshkov@...aro.org, 
	dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org, 
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	marijn.suijten@...ainline.org, quic_abhinavk@...cinc.com, 
	quic_jesszhan@...cinc.com, robdclark@...il.com, sean@...rly.run, 
	simona@...ll.ch
Subject: Re: [PATCH v8 00/15] drm/msm/dpu: Support quad pipe with dual-DSI

Pengyu Luo <mitltlatltl@...il.com> 于2025年4月19日周六 02:34写道：
>
> On Mon, 03 Mar 2025 23:14:29 +0800 Jun Nie <jun.nie@...aro.org> wrote:
> > 2 or more SSPPs and dual-DSI interface are need for super wide panel.
> > And 4 DSC are preferred for power optimal in this case due to width
> > limitation of SSPP and MDP clock rate constrain. This patch set
> > extends number of pipes to 4 and revise related mixer blending logic
> > to support quad pipe. All these changes depends on the virtual plane
> > feature to split a super wide drm plane horizontally into 2 or more sub
> > clip. Thus DMA of multiple SSPPs can share the effort of fetching the
> > whole drm plane.
> >
> > The first pipe pair co-work with the first mixer pair to cover the left
> > half of screen and 2nd pair of pipes and mixers are for the right half
> > of screen. If a plane is only for the right half of screen, only one
> > or two of pipes in the 2nd pipe pair are valid, and no SSPP or mixer is
> > assinged for invalid pipe.
> >
> > For those panel that does not require quad-pipe, only 1 or 2 pipes in
> > the 1st pipe pair will be used. There is no concept of right half of
> > screen.
> >
> > For legacy non virtual plane mode, the first 1 or 2 pipes are used for
> > the single SSPP and its multi-rect mode.
> >
> > To test bonded DSI on SM8650, the 5 patches for active-CTL improvement
> > are needed:
> > https://gitlab.freedesktop.org/lumag/msm/-/commits/dpu-4k?ref_type=heads
> >
>
> [...]
>
> > base-commit: b44251a8c179381b9f3ed3aa49be04fe1d516903
>
> Hi, Jun. The display of my sm8650 device requires 4:4:2(lm, dsc, intf)
> topology, I want to test this series, these patches can't be applied to
> the latest linux-next tree, and I can't find the commit id in linux-next
> or msm-next. Where can I fetch the tree?
>
> Best wishes,
> Pengyu

This is staging patch set. Code clean and formatting is still needed.

https://gitlab.com/jun.nie/linux/-/tree/sm8650/v6.15-quadpipe-staging?ref_type=heads

Regards,
Jun