linux-kernel - Re: [PATCH v6 07/14] drm/msm/dpu: Reserve resources for CWB

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Message-ID: <55njf2p4cg24bihrp7n4laaize7onslfgke6bwqw4jfofsaxq2@epwug3zfs2ow>
Date: Sat, 15 Feb 2025 17:27:54 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Jessica Zhang <quic_jesszhan@...cinc.com>
Cc: Rob Clark <robdclark@...il.com>, quic_abhinavk@...cinc.com, 
	Sean Paul <sean@...rly.run>, Marijn Suijten <marijn.suijten@...ainline.org>, 
	David Airlie <airlied@...il.com>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
	Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
	Simona Vetter <simona@...ll.ch>, Simona Vetter <simona.vetter@...ll.ch>, 
	quic_ebharadw@...cinc.com, linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
	freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org, Rob Clark <robdclark@...omium.org>, 
	Ville Syrjälä <ville.syrjala@...ux.intel.com>
Subject: Re: [PATCH v6 07/14] drm/msm/dpu: Reserve resources for CWB

On Fri, Feb 14, 2025 at 04:14:30PM -0800, Jessica Zhang wrote:
> Add support for RM to reserve dedicated CWB PINGPONGs and CWB muxes
> 
> For concurrent writeback, even-indexed CWB muxes must be assigned to
> even-indexed LMs and odd-indexed CWB muxes for odd-indexed LMs. The same
> even/odd rule applies for dedicated CWB PINGPONGs.
> 
> Track the CWB muxes in the global state and add a CWB-specific helper to
> reserve the correct CWB muxes and dedicated PINGPONGs following the
> even/odd rule.
> 
> Signed-off-by: Jessica Zhang <quic_jesszhan@...cinc.com>
> 

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

-- 
With best wishes
Dmitry