linux-kernel - Re: [PATCH v6 06/15] drm/msm/dpu: fix mixer number counter on allocation

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Message-ID: <2gpvg22nvrmcm5ln3ft4oovt3xy5uedvw5oehb3odf74mvvhkn@hz7wwy7jf6cn>
Date: Mon, 17 Feb 2025 21:51:53 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Jun Nie <jun.nie@...aro.org>
Cc: Rob Clark <robdclark@...il.com>, 
	Abhinav Kumar <quic_abhinavk@...cinc.com>, Sean Paul <sean@...rly.run>, 
	Marijn Suijten <marijn.suijten@...ainline.org>, David Airlie <airlied@...il.com>, 
	Simona Vetter <simona@...ll.ch>, Jessica Zhang <quic_jesszhan@...cinc.com>, 
	linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 06/15] drm/msm/dpu: fix mixer number counter on
 allocation

On Mon, Feb 17, 2025 at 10:15:55PM +0800, Jun Nie wrote:
> Current code only supports usage cases with one pair of mixers at
> most. To support quad-pipe usage case, two pairs of mixers need to
> be reserved. The lm_count for all pairs is cleared if a peer
> allocation fails in current implementation. Reset the current lm_count
> to an even number instead of completely clearing it. This prevents all
> pairs from being cleared in cases where multiple LM pairs are needed.
> 
> Signed-off-by: Jun Nie <jun.nie@...aro.org>
> Reviewed-by: Jessica Zhang <quic_jesszhan@...cinc.com>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 

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

-- 
With best wishes
Dmitry