linux-kernel - Re: [PATCH 2/7] drm/bridge: cdns-dsi: Fix minor bugs

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Date: Thu, 16 May 2024 10:11:39 +0200
From: Maxime Ripard <mripard@...nel.org>
To: Aradhya Bhatia <a-bhatia1@...com>
Cc: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>, 
	Andrzej Hajda <andrzej.hajda@...el.com>, Neil Armstrong <neil.armstrong@...aro.org>, 
	Robert Foss <rfoss@...nel.org>, Laurent Pinchart <Laurent.pinchart@...asonboard.com>, 
	Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>, 
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Jyri Sarha <jyri.sarha@....fi>, 
	Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, 
	Daniel Vetter <daniel@...ll.ch>, DRI Development List <dri-devel@...ts.freedesktop.org>, 
	Linux Kernel List <linux-kernel@...r.kernel.org>, Sam Ravnborg <sam@...nborg.org>, 
	Thierry Reding <treding@...dia.com>, Kieran Bingham <kieran.bingham+renesas@...asonboard.com>, 
	Boris Brezillon <boris.brezillon@...tlin.com>, Nishanth Menon <nm@...com>, 
	Vignesh Raghavendra <vigneshr@...com>, Praneeth Bajjuri <praneeth@...com>, Udit Kumar <u-kumar1@...com>, 
	Devarsh Thakkar <devarsht@...com>, Jayesh Choudhary <j-choudhary@...com>, 
	Jai Luthra <j-luthra@...com>
Subject: Re: [PATCH 2/7] drm/bridge: cdns-dsi: Fix minor bugs

On Sat, May 11, 2024 at 09:00:46PM +0530, Aradhya Bhatia wrote:
> Update the Phy initialized state to "not initialized" when the driver
> (and the hardware by extension) gets suspended. This will allow the Phy
> to get initialized again after resume.
> 
> Fix the OF node that gets passed to find the next available bridge in
> the display pipeline.
> 
> Fix the order of DSI Link and DSI Phy inits. The link init needs to
> happen before the Phy is initialized, so the Phy can lock on the
> incoming PLL reference clock. If this doesn't happen, the Phy cannot
> lock (until DSI Link is init later on). This causes a warning dump
> during the kernel boot.
> 
> Allow the D-Phy config checks to use mode->clock instead of
> mode->crtc_clock during mode_valid checks, like everywhere else in the
> driver.

All these should be in separate patches.

Maxime

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