JPEG IP found in Exynos5433 is similar to what is in Exynos4, but
there are some subtle differences which this patch takes into account.
The most important difference is in what is processed by the JPEG IP and
what has to be provided to it. In case of 5433 the IP does not parse
Huffman and quantisation tables, so this has to be performed with the CPU
and the majority of the code in this patch does that.
A small but important difference is in what address is passed to the JPEG
IP. In case of 5433 it is the SOS (start of scan) position, which is
natural, because the headers must be parsed elsewhere.
There is also a difference in how the hardware is put to work in
device_run.
Data structures are extended as appropriate to accommodate the above
changes.
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Reviewed-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
ERROR: "__bad_ndelay" [drivers/media/platform/s5p-jpeg/s5p-jpeg.ko] undefined!
That happens because asm-generic doesn't like any ndelay time
bigger than 20us.
Currently, usleep_range() couldn't simply be used, since
exynos4_jpeg_sw_reset() is called with a spinlock held.
So, let's use udelay() instead.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Take into account the JPEG_CNTL register value read before
setting SYS_INT_EN bit field.
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
There is no need to read INT_EN_REG before enabling interrupts.
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Add hardware API for the exynos4x12 on s5p-jpeg.
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
