From: Tomasz Stanislawski <t.stanislaws@samsung.com>
To: Andrzej Hajda <a.hajda@samsung.com>,
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
Subject: Re: [PATCHv2 2/3] drm: exynos: hdmi: use hdmiphy as PHY
Date: Wed, 09 Apr 2014 13:05:04 +0200 [thread overview]
Message-ID: <53452960.5070501@samsung.com> (raw)
In-Reply-To: <53452157.9030203@samsung.com>
Hi Andrzej,
This issue could be solved by exporting a regmap from PMU driver
or Exynos clock provider for the usage by exynos-simple-phy.
The operations on PHYs from exynos-simple-phy provider would
be chained to PMU driver and protected by a spinlock in the regmap.
Luckily, the divider is not used as far as I know.
Regards,
Tomasz Stanislawski
On 04/09/2014 12:30 PM, Andrzej Hajda wrote:
> 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
>
>
next prev parent reply other threads:[~2014-04-09 11:05 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-08 14:37 [PATCHv2 0/3] phy: Add exynos-simple-phy driver Tomasz Stanislawski
2014-04-08 14:37 ` [PATCHv2 1/3] " Tomasz Stanislawski
2014-04-09 8:37 ` Andrzej Hajda
2014-04-09 9:12 ` Rahul Sharma
2014-04-09 10:01 ` Sylwester Nawrocki
2014-05-05 9:44 ` Kishon Vijay Abraham I
2014-05-07 10:38 ` Rahul Sharma
2014-05-07 13:36 ` Tomasz Stanislawski
2014-05-07 14:19 ` Rahul Sharma
2014-05-07 15:33 ` Tomasz Figa
2014-05-13 11:20 ` Rahul Sharma
2014-04-09 11:14 ` Tomasz Stanislawski
2014-04-09 11:47 ` Andreas Oberritter
2014-04-30 6:37 ` Rahul Sharma
2014-04-30 8:32 ` Tomasz Stanislawski
2014-04-30 8:43 ` Rahul Sharma
2014-04-08 14:37 ` [PATCHv2 2/3] drm: exynos: hdmi: use hdmiphy as PHY Tomasz Stanislawski
2014-04-09 10:30 ` Andrzej Hajda
2014-04-09 10:46 ` Rahul Sharma
2014-04-09 11:05 ` Tomasz Stanislawski [this message]
2014-04-08 14:37 ` [PATCHv2 3/3] s5p-tv: " Tomasz Stanislawski
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