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

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Message-ID: <20250418183236.209236-1-mitltlatltl@gmail.com>
Date: Sat, 19 Apr 2025 02:32:36 +0800
From: Pengyu Luo <mitltlatltl@...il.com>
To: jun.nie@...aro.org
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

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