在 2017-06-10 05:24，Jernej Škrabec 写道：
Hi!
Dne petek, 09. junij 2017 ob 18:51:02 CEST je Icenowy Zheng napisal(a):
于 2017年6月10日 GMT+08:00 上午12:49:15, Maxime Ripard <maxime.ripard@free-
electrons.com> 写到:
>On Wed, Jun 07, 2017 at 04:48:50PM +0800, Icenowy Zheng wrote:
>> >> @@ -189,6 +211,8 @@ supported.
>> >>
>> >> Required properties:
>> >> - compatible: value must be one of:
>> >> * allwinner,sun8i-v3s-de2-mixer
>> >>
>> >> + * allwinner,sun8i-h3-de2-mixer0
>> >> + * allwinner,sun8i-h3-de2-mixer1
>> >
>> >Again, please explain why we need to have different compatibles
>> >here. If it's only about the number of planes, this should be dealt
>> >with a property, not a compatible.
>>
>> Only mixer0 has "VEP" and write-back support, at least on H3.
>
>What is that VEP? writeback support can also be expressed by a
>property.
I don't know what VEP is...
VEP is probably Video Enhancement Processor (?). Although I'm not sure
if that
is really mixer specific. Icenowy, can you explain where did you get
this info?
In
lichee/linux-3.4/drivers/video/sunxi/disp2/disp/de/lowlevel_sun8iw7/de_feat.c:
static const int de_is_support_vep[] = {
/* DISP0 CH0 */
1,
/* DISP0 CH1 */
0,
/* DISP0 CH2 */
0,
/* DISP0 CH3 */
0,
/* DISP1 CH0 */
0,
/* DISP1 CH1 */
0,
};
Best regards,
Jernej
But we are really facing different cores, like sun50i-a64-mmc
and sun50i-a64-emmc.
>Maxime
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