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Date:   Fri, 13 Jul 2018 10:28:08 +0800
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Subject: Re: [linux-sunxi] Re: [PATCH 1/2] ARM: sun8i: h3: enable HDMI output on Banana Pi M2 Zero
To:     linux-arm-kernel@lists.infradead.org,
        Maxime Ripard <maxime.ripard@bootlin.com>
CC:     devicetree@vger.kernel.org, Chen-Yu Tsai <wens@csie.org>,
        linux-sunxi@googlegroups.com, linux-kernel@vger.kernel.org
From:   Icenowy Zheng <icenowy@aosc.io>
Message-ID: <82CD0BCE-9DE4-45D7-8DF4-FCCFBC70BECF@aosc.io>
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于 2018年7月12日 GMT+08:00 下午10:53:06, Maxime Ripard <maxime.ripard@bootlin.com> 写到:
>On Thu, Jul 12, 2018 at 03:09:55PM +0800, Icenowy Zheng wrote:
>> 于 2018年7月12日 GMT+08:00 下午2:46:01, Maxime Ripard
><maxime.ripard@bootlin.com> 写到:
>> >On Wed, Jul 11, 2018 at 11:15:50PM +0800, Icenowy Zheng wrote:
>> >> 
>> >> 
>> >> 于 2018年7月11日 GMT+08:00 下午11:05:32, Maxime Ripard
>> ><maxime.ripard@bootlin.com> 写到:
>> >> >Hi,
>> >> >
>> >> >On Wed, Jul 11, 2018 at 09:22:32PM +0800, Icenowy Zheng wrote:
>> >> >> Banana Pi M2 Zero board has a miniHDMI port connected to the
>HDMI
>> >> >> controller of Allwinner H3 SoC.
>> >> >> 
>> >> >> Enable the HDMI output in Banana Pi M2 Zero device tree.
>> >> >> 
>> >> >> Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
>> >> >> ---
>> >> >>  .../dts/sun8i-h2-plus-bananapi-m2-zero.dts    | 25
>> >> >+++++++++++++++++++
>> >> >>  1 file changed, 25 insertions(+)
>> >> >> 
>> >> >> diff --git
>a/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts
>> >> >b/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts
>> >> >> index 7d01f9322658..eb61dcf32797 100644
>> >> >> --- a/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts
>> >> >> +++ b/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts
>> >> >> @@ -26,6 +26,17 @@
>> >> >>  		stdout-path = "serial0:115200n8";
>> >> >>  	};
>> >> >>  
>> >> >> +	hdmi-connector {
>> >> >> +		compatible = "hdmi-connector";
>> >> >> +		type = "c";
>> >> >
>> >> >This is not one of the connector type declared in DRM, how is it
>> >> >exposed to the userspace?
>> >> 
>> >> So just use "A" here (because of single link)?
>> >
>> >If the connector type is C, it should be C, and DRM / driver
>adjusted
>> >to handle it.
>> 
>> Okay I won't change this property, if there's any further revisions.
>> 
>> For DRM driver, I think it can be an independent patchset.
>
>Not really, since it's going to break userspace as soon as you merge
>that other patchset.

Should we bother the DRM maintainer to ask for any advice?

>
>Maxime
>
>-- 
>Maxime Ripard, Bootlin (formerly Free Electrons)
>Embedded Linux and Kernel engineering
>https://bootlin.com
>
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