linux-kernel - Re: [PATCH v2 3/3] drm/msm/dpu: Remove arbitrary limit of 1 interface in DSC topology

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Message-ID: <agibhaftgy26tvlxgvhqmiortwaycblsxs42bebj3n54trozj7@46bqaqlrfn6n>
Date: Mon, 10 Feb 2025 01:13:43 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Marijn Suijten <marijn.suijten@...ainline.org>
Cc: 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>, 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>
Subject: Re: [PATCH v2 3/3] drm/msm/dpu: Remove arbitrary limit of 1
 interface in DSC topology

On Sun, Feb 09, 2025 at 10:42:54PM +0100, Marijn Suijten wrote:
> When DSC is enabled the number of interfaces is forced to be 1, and
> documented that it is a "power-optimal" layout to use two DSC encoders
> together with two Layer Mixers.  However, the same layout (two DSC
> hard-slice encoders with two LMs) is also used when the display is
> fed with data over two instead of one interface (common on 4k@...Hz
> smartphone panels with Dual-DSI).  Solve this by simply removing the
> num_intf = 1 assignment as the count is already calculated by computing
> the number of physical encoders within the virtual encoder.
> 
> Fixes: 7e9cc175b159 ("drm/msm/disp/dpu1: Add support for DSC in topology")
> Signed-off-by: Marijn Suijten <marijn.suijten@...ainline.org>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

-- 
With best wishes
Dmitry