Because video duration involves calculating the streaming time, and i2c
communication incurs too many XTALK register settings every 4 bytes with
i2c START and STOP.
So we have opted switch to the i2c burst method.
This method involves writing the XTALK registers in the order of
the register block.
The start streaming time can be reduced from around 400ms to 150ms
[Sakari Ailus: Drop unneeded dev_dbg().]
Signed-off-by: Jason Chen <jason.z.chen@intel.com>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This reverts commit feb8831be9.
Commit feb8831be9 contained unintentional
changes to Documentation/devicetree/bindings/media/video-interfaces.yaml
and arch/arm/boot/dts/ti/omap/omap3-n9.dts. Revert the entire patch.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Because video duration involves calculating the streaming time, and i2c
communication incurs too many XTALK register settings every 4 bytes with
i2c START and STOP.
So we have opted switch to the i2c burst method.
This method involves writing the XTALK registers in the order of
the register block.
The start streaming time can be reduced from around 400ms to 150ms
[Sakari Ailus: Drop unneeded dev_dbg().]
Signed-off-by: Jason Chen <jason.z.chen@intel.com>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
ov08x40 quad bayer sensor ISP has the following work modes:
- normal mode: full size
- 2x2 binned mode: binning size
In normal and binned modes, different tline calculations are
applied.
- normal mode: Tline value needs to be doubled as per the
vendor's update.
Tline time = 2 * HTS / SCLK
Exposure unit : 1 * HTS = 0.5 Tline
- 2x2 binned mode:
Tline time = 1 * HTS / SCLK
Exposure unit : 1 * HTS = 1 Tline
Signed-off-by: Jason Chen <jason.z.chen@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
When the system enters the D0 state and attempt to probe the device,
another component, such as LED, will also be pulled high due to the
hardware design. It's advisable to keep the device being probed in
a different D state.
Signed-off-by: Jason Chen <jason.z.chen@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Stopping streaming on a camera pipeline at system suspend time, and
restarting it at system resume time, requires coordinated action between
the bridge driver and the camera sensor driver. This is handled by the
bridge driver calling the sensor's .s_stream() handler at system suspend
and resume time. There is thus no need for the sensor to independently
implement system sleep PM operations. Drop them.
The streaming field of the driver's private structure is now unused,
drop it as well.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
The subdev .s_stream() operation shall not be called to start streaming
on an already started subdev, or stop streaming on a stopped subdev.
Remove the check that guards against that condition.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
The HTS value cannot be directly compared to the sensor's output
size. It needs to be converted to an absolute time unit.
Additionally, the hblank value need to be modified as it was
previous invalid.
Signed-off-by: Jason Chen <jason.z.chen@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Remove Shawn Tu's and Chiranjeevi Rapolu's e-mail addresses as they are no
longer function.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
After commit b8a1a4cd5a ("i2c: Provide a temporary .probe_new()
call-back type"), all drivers being converted to .probe_new() and then
commit 03c835f498 ("i2c: Switch .probe() to not take an id parameter")
convert back to (the new) .probe() to be able to eventually drop
.probe_new() from struct i2c_driver.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
In commit ed5c2f5fd1 ("i2c: Make remove callback return void") drivers
were updated to remove the return value of the remove callback, and
return void.
The OV08x40 was added after this commit but was not compile tested at
the time due to a KConfig issue, and this warning was missed.
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 38fc5136ac ("media: i2c: Add ov08x40 image sensor driver")
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Add a V4L2 sub-device driver for Omnivision ov08X40 image sensor.
This is a camera sensor using the I2C bus for control and the
CSI-2 bus for data.
This driver supports following features:
- manual exposure and analog/digital gain control support
- vblank/hblank control support
- test pattern support
- media controller support
- runtime PM support
- support following resolutions:
+ 3856x2464 at 30FPS
+ 1928x1208 at 30FPS
Signed-off-by: Jason Chen <jason.z.chen@intel.com>
Signed-off-by: Shawn Tu <shawnx.tu@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
