linux-kernel - Re: [PATCH] drm/msm/dpu: Only enable DSC_MODE_MULTIPLEX if dsc

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Date: Mon, 5 Feb 2024 06:37:25 +0100
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>, Daniel Vetter <daniel@...ll.ch>, 
	Vinod Koul <vkoul@...nel.org>, linux-arm-msm@...r.kernel.org, 
	dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org, Luca Weiss <luca.weiss@...rphone.com>
Subject: Re: [PATCH] drm/msm/dpu: Only enable DSC_MODE_MULTIPLEX if dsc_merge
 is enabled

On Sun, 4 Feb 2024 at 18:45, Marijn Suijten
<marijn.suijten@...ainline.org> wrote:
>
> When the topology calls for two interfaces on the current fixed topology
> of 2 DSC blocks, or uses 1 DSC block for a single interface (e.g. SC7280
> with only one DSC block), there should be no merging of DSC output.
>
> This is already represented by the return value of
> dpu_encoder_use_dsc_merge(), but not yet used to correctly configure
> this flag.
>
> Fixes: 58dca9810749 ("drm/msm/disp/dpu1: Add support for DSC in encoder")
> Signed-off-by: Marijn Suijten <marijn.suijten@...ainline.org>
> ---
> Note that more changes are needed to properly support the proposed 2:2:2
> and 1:1:1 topology (in contrast to the already-supported 2:2:1 topology),
> but this could be a trivial patch to get going separately before all that
> extra work is done.
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)

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

-- 
With best wishes
Dmitry