From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrzej Hajda Subject: Re: [PATCHv2 2/3] drm: exynos: hdmi: use hdmiphy as PHY Date: Wed, 09 Apr 2014 12:30:47 +0200 Message-ID: <53452157.9030203@samsung.com> References: <1396967856-27470-1-git-send-email-t.stanislaws@samsung.com> <1396967856-27470-3-git-send-email-t.stanislaws@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from mailout2.w1.samsung.com ([210.118.77.12]:62808 "EHLO mailout2.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750784AbaDIKax (ORCPT ); Wed, 9 Apr 2014 06:30:53 -0400 In-reply-to: <1396967856-27470-3-git-send-email-t.stanislaws@samsung.com> Sender: linux-samsung-soc-owner@vger.kernel.org List-Id: linux-samsung-soc@vger.kernel.org To: Tomasz Stanislawski , linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org Cc: kgene.kim@samsung.com, kishon@ti.com, kyungmin.park@samsung.com, robh+dt@kernel.org, grant.likely@linaro.org, sylvester.nawrocki@gmail.com, rahul.sharma@samsung.com 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