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mirror_ubuntu-kernels/drivers/media/platform/s5p-cec
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Hans Verkuil e949f61461 media: s5p-cec: add NACK detection support 
The s5p-cec driver returned CEC_TX_STATUS_ERROR for the NACK condition.

Some digging into the datasheet uncovered the S5P_CEC_TX_STAT1 register where
bit 0 indicates if the transmit was nacked or not.

Use this to return the correct CEC_TX_STATUS_NACK status to userspace.

This was the only driver that couldn't tell a NACK from another error, and
that was very unusual. And a potential problem for applications as well.

Tested with my Odroid-U3.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: <stable@vger.kernel.org>      # for v4.12 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-09-23 07:29:30 -04:00
..
exynos_hdmi_cec.h
exynos_hdmi_cecctrl.c media: s5p-cec: add NACK detection support 2017-09-23 07:29:30 -04:00
Makefile
regs-cec.h
s5p_cec.c media: s5p-cec: add NACK detection support 2017-09-23 07:29:30 -04:00
s5p_cec.h media: s5p-cec: add NACK detection support 2017-09-23 07:29:30 -04:00