Message-ID: <5459877D.2080606@rock-chips.com>
Date: Wed, 05 Nov 2014 10:12:13 +0800
From: Andy Yan <andy.yan@rock-chips.com>
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To: Russell King - ARM Linux <linux@arm.linux.org.uk>
CC: airlied@linux.ie, heiko@sntech.de, fabio.estevam@freescale.com,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Grant Likely <grant.likely@linaro.org>,
        Rob Herring <robh+dt@kernel.org>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        Shawn Guo <shawn.guo@linaro.org>, Josh Boyer <jwboyer@redhat.com>,
        Sean Paul <seanpaul@chromium.org>, Inki Dae <inki.dae@samsung.com>,
        Dave Airlie <airlied@redhat.com>, Arnd Bergmann <arnd@arndb.de>,
        Lucas Stach <l.stach@pengutronix.de>, Zubair.Kakakhel@imgtec.com,
        djkurtz@google.com, ykk@rock-chips.com, linux-kernel@vger.kernel.org,
        dri-devel@lists.freedesktop.org, devel@driverdev.osuosl.org,
        devicetree@vger.kernel.org, linux-rockchip@lists.infradead.org
Subject: Re: [PATCH 0/2] make imx hdmi publicly used by dw hdmi compatible
 platform
References: <1415107992-34289-1-git-send-email-andy.yan@rock-chips.com> <20141104142908.GG4042@n2100.arm.linux.org.uk>
In-Reply-To: <20141104142908.GG4042@n2100.arm.linux.org.uk>
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On 2014年11月04日 22:29, Russell King - ARM Linux wrote:
> On Tue, Nov 04, 2014 at 09:33:10PM +0800, Andy Yan wrote:
>> From: Andy yan <andy.yan@rock-chips.com>
>>
>> We found freescale imx6 and rockchip rk3288 and Ingenic JZ4780 (Xburst/MIPS)
>> use the interface compatible Designware HDMI IP, but they also have some
>> lightly difference, such as phy pll configuration, register width(imx hdmi
>> register is one byte, but rk3288 is 4 bytes width and can only access by word),
>> 4K support(imx6 doesn't support 4k, but rk3288 does).
>>
>> To reuse the imx-hdmi driver, we do this patch set:
>> patch (1): split out imx-soc code from imx-hdmi to dw_hdmi-imx.c
>> patch (2): move imx-hdmi to bridge/, and rename to dw-hdmi to
>> make this driver indepent of drm-imx . And we will add rockchip
>> platform specific code dw_hdmi-rockchip.c later, this is depend
>> on drm-rockchip.
> Great - I fully agree that this needs to be renamed as it is a Designware
> IP.
>
> Should it be moved into bridge/ ?  It isn't implemented as a DRM bridge
> driver at present, so this seems illogical.  Is the longer term plan to
> convert it to be a DRM bridge?
We have plan to convert it to DRM bridge.
>
> Secondly, if you want HDMI audio support, you may find the patches I
> maintain for the SolidRun devices useful, which add this as a standard
> ALSA device.  I also have CEC support for it as well.  If you're
> interested, I'll email those.
>
It's very great if you email those, we are also working on audio and CEC.

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