Am Montag, den 21.07.2014, 21:19 +0200 schrieb Robert Schwebel:
> Hi Mauro,
>
> On Mon, Jul 21, 2014 at 04:01:28PM -0300, Mauro Carvalho Chehab wrote:
> > > This patch adds support for the CODA960 VPU in Freescale i.MX6 SoCs.
> > >
> > > It enables h.264 and MPEG4 encoding and decoding support. Besides the usual
> > > register shifting, the CODA960 gains frame memory control and GDI registers
> > > that are set up for linear mapping right now, needs ENC_PIC_SRC_INDEX to be
> > > set beyond the number of internal buffers for some reason, and has subsampling
> > > buffers that need to be set up. Also, the work buffer size is increased to
> > > 80 KiB.
> > >
> > > The CODA960 firmware spins if there is not enough input data in the bitstream
> > > buffer. To make it continue, buffers need to be copied into the bitstream as
> > > soon as they are queued. As the bitstream fifo is written into from two places,
> > > it must be protected with a mutex. For that, using a threaded interrupt handler
> > > is necessary.
> > >
> > > Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
> > > ---
> >
> > ...
> >
> > > + [CODA_IMX6Q] = {
> > > + .firmware = "v4l-coda960-imx6q.bin",
> > > + .product = CODA_960,
> > > + .codecs = coda9_codecs,
> > > + .num_codecs = ARRAY_SIZE(coda9_codecs),
> > > + },
> > > + [CODA_IMX6DL] = {
> > > + .firmware = "v4l-coda960-imx6dl.bin",
> > > + .product = CODA_960,
> > > + .codecs = coda9_codecs,
> > > + .num_codecs = ARRAY_SIZE(coda9_codecs),
> > > + },
> >
> > Where are those firmware files available?
>
> Freescale currently distributes the firmware with their multimedia
> packages, but in header hex array form; we are trying to find a proper
> solution (hopefully by using the linux firmware repository) for
> mainline.
The firmware-imx packages referenced in the Freescale meta-fsl-arm
repository on github.com contain VPU firmware files. Their use is
restricted by an EULA. For example:
http://www.freescale.com/lgfiles/NMG/MAD/YOCTO/firmware-imx-3.0.35-4.0.0.bin
This contains the files vpu_fw_imx6q.bin and vpu_fw_imx6d.bin, which can
be converted into v4l-coda960-imx6q.bin and v4l-coda960-imx6dl.bin,
respectively, by dropping the headers and reordering the rest.
I described this for i.MX53 earlier here:
http://lists.infradead.org/pipermail/linux-arm-kernel/2013-July/181101.html
> The Freescale kernel people are currently discussing this internally
> with their legal folks, see this discussion:
>
> http://www.spinics.net/lists/linux-media/msg78273.html
regards
Philipp
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