Re: [linux-sunxi] [PATCH 14/15] ARM: dts: sun8i: h3: Enable HDMI output on H3 boards

[Icenowy Zheng]

ä 2018å2æ25æ GMT+08:00 äå5:06:32, Julian Calaby <julian.calaby@xxxxxxxxx> åå:
>Hi Icenowy,
>
>On Sun, Feb 25, 2018 at 7:43 PM, Icenowy Zheng <icenowy@xxxxxxx> wrote:
>>
>>
>> ä 2018å2æ25æ GMT+08:00 äå4:11:34, Julian Calaby
><julian.calaby@xxxxxxxxx> åå:
>>>Hi Jernej,
>>>
>>>On Sun, Feb 25, 2018 at 8:45 AM, Jernej Skrabec
>>><jernej.skrabec@xxxxxxxx> wrote:
>>>> Enable HDMI output on all boards which have HDMI connector.
>>>>
>>>> Signed-off-by: Jernej Skrabec <jernej.skrabec@xxxxxxxx>
>>>> ---
>>>>  arch/arm/boot/dts/sun8i-h3-bananapi-m2-plus.dts    | 25
>>>++++++++++++++++++++++
>>>>  arch/arm/boot/dts/sun8i-h3-beelink-x2.dts          | 25
>>>++++++++++++++++++++++
>>>>  arch/arm/boot/dts/sun8i-h3-libretech-all-h3-cc.dts | 25
>>>++++++++++++++++++++++
>>>>  arch/arm/boot/dts/sun8i-h3-nanopi-m1.dts           | 25
>>>++++++++++++++++++++++
>>>>  arch/arm/boot/dts/sun8i-h3-orangepi-2.dts          | 25
>>>++++++++++++++++++++++
>>>>  arch/arm/boot/dts/sun8i-h3-orangepi-lite.dts       | 25
>>>++++++++++++++++++++++
>>>>  arch/arm/boot/dts/sun8i-h3-orangepi-one.dts        | 24
>>>+++++++++++++++++++++
>>>>  arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts         | 25
>>>++++++++++++++++++++++
>>>>  8 files changed, 199 insertions(+)
>>>
>>>As I understand it, the H2+ is just a slightly trimmed down H3. In
>>>terms of HDMI support, the difference is that the H2+ can't output
>4k.
>>
>> H2+ can OUTPUT 4K. The BSP restricts it to DECODE 4K. (And mainline
>won't have such restriction)
>
>Interesting!
>
>I'm getting my data from here: http://linux-sunxi.org/H3#Variants
>
>So essentially what you're saying is that the H2+ is just a H3 with
>less pins? (I'm assuming the "lack of gigabit mac" is effectively it
>not having the required pins, i.e. GPIO bank D)

No it's just downspec and BSP decode code restricts 4K
decode (by reserving less memory).

Just similar to STM32F103C8T6, which has a spec of 64KiB Flash, but with in fact 128KiB usable.

For GbE with H2+, it's verified by Banana Pi.

>
>Thanks,