linux-kernel - Re: [PATCH 3/7] drm/bridge: tc358768: Separate indirect register writes

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Message-ID: <20251219102907.GC39796@francesco-nb>
Date: Fri, 19 Dec 2025 11:29:07 +0100
From: Francesco Dolcini <francesco@...cini.it>
To: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Cc: 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>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	Parth Pancholi <parth.pancholi@...adex.com>,
	Francesco Dolcini <francesco.dolcini@...adex.com>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/7] drm/bridge: tc358768: Separate indirect register
 writes

On Tue, Oct 21, 2025 at 04:22:59PM +0300, Tomi Valkeinen wrote:
> Some registers can only be written indirectly, using DSI_CONFW register.
> We don't have many uses for those registers (in fact, only DSI_CONTROL
> is currently written), but the code to do those writes inline is a bit
> confusing.
> 
> Add a new function, tc358768_confw_update_bits() which can be used to
> write the bits indirectly. Only DSI_CONTROL is currently supported.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>

Reviewed-by: Francesco Dolcini <francesco.dolcini@...adex.com>