linux-kernel - Re: [PATCHv2 2/3] drm: exynos: hdmi: use hdmiphy as PHY

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Date:	Wed, 09 Apr 2014 12:30:47 +0200
From:	Andrzej Hajda <a.hajda@...sung.com>
To:	Tomasz Stanislawski <t.stanislaws@...sung.com>,
	linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	devicetree@...r.kernel.org, linux-media@...r.kernel.org,
	dri-devel@...ts.freedesktop.org
Cc:	kgene.kim@...sung.com, kishon@...com, kyungmin.park@...sung.com,
	robh+dt@...nel.org, grant.likely@...aro.org,
	sylvester.nawrocki@...il.com, rahul.sharma@...sung.com
Subject: Re: [PATCHv2 2/3] drm: exynos: hdmi: use hdmiphy as PHY

Hi Tomasz,

On 04/08/2014 04:37 PM, Tomasz Stanislawski wrote:
> The HDMIPHY (physical interface) is controlled by a single
> bit in a power controller's regiter. It was implemented
> as clock. It was a simple but effective hack.

This power controller register has also bits to control HDMI clock
divider ratio. I guess current drivers do not change it, but how do you
want to implement access to it if some HDMI driver in the future will
need to change ratio. I guess in case of clk it would be easier.

Regards
Andrzej


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