On Tue, Sep 18, 2018 at 2:34 AM Philipp Zabel <p.za...@pengutronix.de> wrote: > > Add a single imx-media mem2mem video device that uses the IPU IC PP > (image converter post processing) task for scaling and colorspace > conversion. > On i.MX6Q/DL SoCs with two IPUs currently only the first IPU is used. > > The hardware only supports writing to destination buffers up to > 1024x1024 pixels in a single pass, arbitrary sizes can be achieved > by rendering multiple tiles per frame. > > Signed-off-by: Philipp Zabel <p.za...@pengutronix.de> > [steve_longerb...@mentor.com: use ipu_image_convert_adjust(), fix > device_run() error handling] > Signed-off-by: Steve Longerbeam <steve_longerb...@mentor.com> > --- > Changes since v2: > - Rely on ipu_image_convert_adjust() in mem2mem_try_fmt() for format > adjustments. This makes the mem2mem driver mostly a V4L2 mem2mem API > wrapper around the IPU image converter, and independent of the > internal image converter implementation. > - Remove the source and destination buffers on error in device_run(). > Otherwise the conversion is re-attempted apparently over and over > again (with WARN() backtraces). > - Allow subscribing to control changes. > --- > drivers/staging/media/imx/Kconfig | 1 + > drivers/staging/media/imx/Makefile | 1 + > drivers/staging/media/imx/imx-media-dev.c | 11 + > drivers/staging/media/imx/imx-media-mem2mem.c | 873 ++++++++++++++++++ > drivers/staging/media/imx/imx-media.h | 10 + > 5 files changed, 896 insertions(+) > create mode 100644 drivers/staging/media/imx/imx-media-mem2mem.c >
Philipp, Thanks for submitting this! I'm hoping this lets us use non-IMX capture devices along with the IMX media controller entities to so we can use hardware CSC,scaling,pixel-format-conversions and ultimately coda based encode. I've built this on top of linux-media and see that it registers as /dev/video8 but I'm not clear how to use it? I don't see it within the media controller graph. Regards, Tim
