linux

iv/linux

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Umang Jain 4c0307b060 media: imx258: Limit the max analogue gain to 480

[ Upstream commit f809665ee75fff3f4ea8907f406a66d380aeb184 ]

The range for analog gain mentioned in the datasheet is [0, 480].
The real gain formula mentioned in the datasheet is:

	Gain = 512 / (512 – X)

Hence, values larger than 511 clearly makes no sense. The gain
register field is also documented to be of 9-bits in the datasheet.

Certainly, it is enough to infer that, the kernel driver currently
advertises an arbitrary analog gain max. Fix it by rectifying the
value as per the data sheet i.e. 480.

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2021-09-22 11:48:06 +02:00

cec

cec-api: prevent leaking memory through hole in structure

2020-09-03 11:24:21 +02:00

common

media: videobuf2-core: dequeue if start_streaming fails

2021-08-12 13:19:39 +02:00

dvb-core

media: dvb_net: avoid speculation from net slot

2021-07-20 16:15:44 +02:00

dvb-frontends

media: dib8000: rewrite the init prbs logic