linux-kernel - Re: [PATCH v2 18/22] media: dt-bindings: ti,ds90ub960: Allow setting serializer address

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Message-ID: <20250127-aquatic-herring-of-speed-29a59f@krzk-bin>
Date: Mon, 27 Jan 2025 08:45:43 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>, 
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, Devarsh Thakkar <devarsht@...com>, 
	Jai Luthra <jai.luthra@...asonboard.com>, Sakari Ailus <sakari.ailus@...ux.intel.com>, 
	devicetree@...r.kernel.org, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>
Subject: Re: [PATCH v2 18/22] media: dt-bindings: ti,ds90ub960: Allow setting
 serializer address

On Fri, Jan 24, 2025 at 05:17:55PM +0200, Tomi Valkeinen wrote:
> From: Jai Luthra <jai.luthra@...asonboard.com>
> 
> The serializer's I2C address on the FPD-Link bus is usually communicated
> to the deserializer once the forward-channel is established. But in some
> cases it might be necessary to program the serializer (over the
> back-channel) before the forward-channel is established.
> 
> This can be used e.g. to correct serializer configuration which
> otherwise would prevent the FC to be enabled. To be able to communicate
> to the serializer before the forward-channel is up, the deserializer
> driver neds to know the default i2c address of the serializer.
> 
> Allow setting the serializer i2c address using the 'reg' property. This
> is optional, and usually not needed.
> 
> Signed-off-by: Jai Luthra <jai.luthra@...asonboard.com>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
> ---
> Cc: devicetree@...r.kernel.org
> Cc: Rob Herring <robh@...nel.org>
> Cc: Krzysztof Kozlowski <krzk+dt@...nel.org>
> Cc: Conor Dooley <conor+dt@...nel.org>

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

Best regards,
Krzysztof