Le mardi 12 juillet 2016 ? 16:16 +0800, Wu-Cheng Li (???) a ?crit?:

Decoder hardware produces MT21 (compressed). Image processor can
convert it to a format that can be input of display driver. Tiffany.
When do you plan to upstream image processor (mtk-mdp)?

quoted

It can be as input format for encoder, MDP and display drivers in

our

quoted

platform.

I remember display driver can only accept uncompressed MT21. Right?
Basically V4L2_PIX_FMT_MT21 is compressed and is like an opaque
format. It's not usable until it's decompressed and converted by
image
processor.

Previously it was described as MediaTek block mode, and now as a
MediaTek compressed format. It makes me think you have no idea what
this pixel format really is. Is that right ?

The main reason why I keep asking, is that we often find similarities
between what vendor like to call their proprietary formats. Doing the
proper research helps not creating a mess like in Android where you
have a lot of formats that all point to the same format. I believe
there was the same concern when Samsung wanted to introduce their Z-
flip-Z NV12 tile format. In the end they simply provided sufficient
documentation so we could document it and implement software converters
for test and validation purpose.

regards,
Nicolas