| Message ID | 20180725100256.22833-1-paul.kocialkowski@bootlin.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | Cedrus driver for the Allwinner Video Engine, using media requests | expand |
On 07/25/2018 12:02 PM, Paul Kocialkowski wrote: > This is the sixth iteration of the updated Cedrus driver, > that supports the Video Engine found in most Allwinner SoCs, starting > with the A10. It was tested on the A13, A20, A33 and H3. > > The initial version of this driver[0] was originally written and > submitted by Florent Revest using a previous version of the request API > that is necessary to provide coherency between controls and the buffers > they apply to. > > The driver was adapted to use the latest version of the media request > API[1], as submitted by Hand Verkuil. Media request API support is a > hard requirement for the Cedrus driver. > > The driver itself currently only supports MPEG2 and more codecs will be > added to the driver eventually. The output frames provided by the > Video Engine are in a multi-planar 32x32-tiled YUV format, with a plane > for luminance (Y) and a plane for chrominance (UV). A specific format is > introduced in the V4L2 API to describe it. > > This implementation is based on the significant work that was conducted > by various members of the linux-sunxi community for understanding and > documenting the Video Engine's innards. > > In addition to the media requests API, the following series are required > for Cedrus: > * vicodec: the Virtual Codec driver This will appear in for 4.19. > * allwinner: a64: add SRAM controller / system control > * SRAM patches from the Cedrus VPU driver series version 5 What about these? Are they queued up for 4.19 as well? I'll post a rebased reqv17 later today that includes the "add v4l2_ctrl_request_hdl_find/put/ctrl_find functions" patch. Regards, Hans
Hi, On Sat, 2018-08-04 at 14:43 +0200, Hans Verkuil wrote: > On 07/25/2018 12:02 PM, Paul Kocialkowski wrote: > > This is the sixth iteration of the updated Cedrus driver, > > that supports the Video Engine found in most Allwinner SoCs, starting > > with the A10. It was tested on the A13, A20, A33 and H3. > > > > The initial version of this driver[0] was originally written and > > submitted by Florent Revest using a previous version of the request API > > that is necessary to provide coherency between controls and the buffers > > they apply to. > > > > The driver was adapted to use the latest version of the media request > > API[1], as submitted by Hand Verkuil. Media request API support is a > > hard requirement for the Cedrus driver. > > > > The driver itself currently only supports MPEG2 and more codecs will be > > added to the driver eventually. The output frames provided by the > > Video Engine are in a multi-planar 32x32-tiled YUV format, with a plane > > for luminance (Y) and a plane for chrominance (UV). A specific format is > > introduced in the V4L2 API to describe it. > > > > This implementation is based on the significant work that was conducted > > by various members of the linux-sunxi community for understanding and > > documenting the Video Engine's innards. > > > > In addition to the media requests API, the following series are required > > for Cedrus: > > * vicodec: the Virtual Codec driver > > This will appear in for 4.19. > > > * allwinner: a64: add SRAM controller / system control > > * SRAM patches from the Cedrus VPU driver series version 5 > > What about these? Are they queued up for 4.19 as well? Yes, they are queued for 4.19 through Maxime's tree[0]. > I'll post a rebased reqv17 later today that includes the > "add v4l2_ctrl_request_hdl_find/put/ctrl_find functions" patch. Great, I'll rebase and send a new version (taking in account your latest review) as soon as time allows! Cheers, Paul [0]: https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux.git/log/?h=sunxi/for-next