linux-kernel - Re: [PATCH v8 11/13] drm/atomic-helper: Separate out bridge pre_enable/post

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Message-ID: <4srelpkf4ks6xdzsxdaqkruktyk6gieeirvi7vrmscp7yg753a@ckoe6hnjmqmk>
Date: Sun, 26 Jan 2025 23:54:13 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Aradhya Bhatia <aradhya.bhatia@...ux.dev>
Cc: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>, 
	Laurent Pinchart <laurent.pinchart@...asonboard.com>, Andrzej Hajda <andrzej.hajda@...el.com>, 
	Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>, Jonas Karlman <jonas@...boo.se>, 
	Jernej Skrabec <jernej.skrabec@...il.com>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
	Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, Nishanth Menon <nm@...com>, 
	Vignesh Raghavendra <vigneshr@...com>, Devarsh Thakkar <devarsht@...com>, 
	Praneeth Bajjuri <praneeth@...com>, Udit Kumar <u-kumar1@...com>, 
	Jayesh Choudhary <j-choudhary@...com>, DRI Development List <dri-devel@...ts.freedesktop.org>, 
	Linux Kernel List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v8 11/13] drm/atomic-helper: Separate out bridge
 pre_enable/post_disable from enable/disable

On Mon, Jan 27, 2025 at 12:45:49AM +0530, Aradhya Bhatia wrote:
> The encoder-bridge ops occur by looping over the new connector states of
> the display pipelines. The enable sequence runs as follows -
> 
> 	- pre_enable(bridge),
> 	- enable(encoder),
> 	- enable(bridge),
> 
> while the disable sequnce runs as follows -
> 
> 	- disable(bridge),
> 	- disable(encoder),
> 	- post_disable(bridge).
> 
> Separate out the pre_enable(bridge), and the post_disable(bridge)
> operations into separate functions each.
> 
> This patch keeps the sequence same for any singular disaplay pipe, but
> changes the sequence across multiple display pipelines.
> 
> This patch is meant to be an interim patch, to cleanly pave the way for
> the sequence re-ordering patch, and maintain bisectability in the
> process.
> 
> Signed-off-by: Aradhya Bhatia <aradhya.bhatia@...ux.dev>
> ---
>  drivers/gpu/drm/drm_atomic_helper.c | 92 +++++++++++++++++++++++++++--
>  1 file changed, 88 insertions(+), 4 deletions(-)
> 

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

-- 
With best wishes
Dmitry