[U-Boot] [RFC PATCH 2/3] sunxi: video: Add video driver for H3 SoC

[Chen-Yu Tsai]

On Tue, Dec 13, 2016 at 11:40 PM, Maxime Ripard
<maxime.ripard at free-electrons.com> wrote:
> Hi,
>
> On Tue, Dec 13, 2016 at 01:36:29AM +0100, Jernej Skrabec wrote:
>> This patch adds support for hdmi output. It is designed in the same
>> way as video driver for older Allwinner SoCs.
>>
>> First it checks if monitor is attached. If it is, recommended
>> timings are read from EDID. After that, DE2, TCON and HDMI are
>> configured according to this timings.
>>
>> 32MB of RAM is used for framebuffer. This is just enough to support
>> 4K resolution.
>>
>> SimpleFB is also supported by this driver.
>>
>> Signed-off-by: Jernej Skrabec <jernej.skrabec at siol.net>
>
> From the linux discussion, I recall that you said that the TCON was
> still the same, and the HDMI was something that could be shared with
> the Rockchip implementation. Did you look into sharing the TCON code
> (for example using a small "library" to share the functions) and to
> reuse Rockchip's HDMI code?

I second the first proposal. The TCON structure has not changed since
the A10. Allwinner just removed the unused channels. Channel 1 is
removed from the first TCON, and channel 0 is removed from the second
TCON. So Allwinner is more or less committing to a static mapping for
the display pipeline outputs.

Regards
ChenYu