linux-kernel - Re: [PATCH v3 0/3] drm/msm: Initial fixes for DUALPIPE (+DSC) topology

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Message-Id: <174063096231.3733075.12359628764026922067.b4-ty@linaro.org>
Date: Thu, 27 Feb 2025 06:37:32 +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>,
	David Airlie <airlied@...il.com>,
	Vinod Koul <vkoul@...nel.org>,
	Simona Vetter <simona@...ll.ch>,
	Archit Taneja <architt@...eaurora.org>,
	Hai Li <hali@...eaurora.org>,
	Marijn Suijten <marijn.suijten@...ainline.org>
Cc: linux-arm-msm@...r.kernel.org,
	dri-devel@...ts.freedesktop.org,
	freedreno@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Jordan Crouse <jordan@...micpenguin.net>,
	~postmarketos/upstreaming@...ts.sr.ht,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Martin Botka <martin.botka@...ainline.org>,
	Jami Kettunen <jami.kettunen@...ainline.org>,
	Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
	Jessica Zhang <quic_jesszhan@...cinc.com>
Subject: Re: [PATCH v3 0/3] drm/msm: Initial fixes for DUALPIPE (+DSC) topology


On Mon, 17 Feb 2025 12:17:40 +0100, Marijn Suijten wrote:
> This series covers a step-up towards supporting the DUALPIPE DSC
> topology, also known as 2:2:2 topology (on active-CTL hardware).  It
> involves 2 layer mixers, 2 DSC compression encoders, and 2 interfaces
> (on DSI, this is called bonded-DSI) where bandwidth constraints (e.g. 4k
> panels at 120Hz) require two interfaces to transmit pixel data.
> 
> Enabling this topology will be hard(er) than downstream as hacking a
> layout type in DTS won't be describing the hardware, but "dynamically"
> determining it at runtime may pose some of a challenge that is left to a
> future series.  Such changes will also involve the 1:1:1 topology needed
> for constrained hardware like the Fairphone 5 on SC7280 with access to
> only one DSC encoder and thus ruled out of the current 2:2:1 topology.
> 
> [...]

Applied, thanks!

[1/3] drm/msm/dsi: Use existing per-interface slice count in DSC timing
      https://gitlab.freedesktop.org/lumag/msm/-/commit/14ad809ceb66
[2/3] drm/msm/dsi: Set PHY usescase (and mode) before registering DSI host
      https://gitlab.freedesktop.org/lumag/msm/-/commit/660c396c98c0
[3/3] drm/msm/dpu: Remove arbitrary limit of 1 interface in DSC topology
      https://gitlab.freedesktop.org/lumag/msm/-/commit/d245ce568929

Best regards,
-- 
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>