Re: [PATCH v7 2/4] media: videodev2: add V4L2_FMT_FLAG_FIXED_RESOLUTION
From: Philipp Zabel
Date: Tue Jun 11 2019 - 04:56:45 EST
On Wed, 2019-06-05 at 15:39 +0200, Hans Verkuil wrote:
> Hi Maxime,
> I am wondering if this flag shouldn't be inverted: you set
> V4L2_FMT_FLAG_DYN_RESOLUTION if dynamic resolution is supported,
> otherwise it isn't.
> Can all the existing mainlined codec drivers handle midstream
> resolution changes?
> s5p-mfc, venus and mediatek can, but I see no SOURCE_CHANGE event in
> the coda drivers, so I suspect that that can't handle this.
> Philipp, what is the status of the coda driver for dynamic resolution
FTR, to my knowledge there is no dynamic resolution change support in
the firmware, as there is no signal (interrupt nor picture run return
value) to indicate that different headers were parsed.
I am planning to add the initial source change event required by the
current decoder API documentation, but I am afraid there will be no
support for source changes due to mid-stream resolution changes due to