Working with the OV13850 camera sensor on the NanoPC-T4

Commit Message

Sebastian Fricke Nov. 15, 2020, 11:10 a.m. UTC

Hello,

I am currently trying to get the OV13850 camera sensor
(https://www.friendlyarm.com/index.php?route=product/product&product_id=228) to work on my friendlyElec NanoPC-T4.

I have problems with connecting the RkISP1 ISP to the OV13850 sensor and I am not sure,
where the problem could be. The device tree seems to load correctly and
I can detect the sensor as a device on the i2c bus:

root@nanopct4:~# cat /sys/bus/i2c/devices/1-0010/name 
ov13850

And the driver module is loaded as well:

root@nanopct4:~# lsmod | grep ov13850
ov13850                28672  0
v4l2_fwnode            28672  2 rockchip_isp1,ov13850
videodev              266240  9 rockchip_vdec,v4l2_fwnode,rockchip_isp1,videobuf2_v4l2,hantro_vpu,rockchip_rga,videobuf2_common,v4l2_mem2mem,ov13850
mc                     61440  8 rockchip_vdec,videodev,rockchip_isp1,videobuf2_v4l2,hantro_vpu,videobuf2_common,v4l2_mem2mem,ov13850

The driver reports using dummy regulators instead of the requested ones,
I am not sure yet if this is part of the problem, as the driver doesn't
bail out after requesting the regulators. But from what I currently
understand, these warnings mean that for some reason my system didn't
map these regulators but acts as if they were there.

More info below, I hope that someone can help to find the error I made,
thanks in advance!

-----------------------------

I attached the two patches I created:
1. For the device tree I combined a patch from Helen Koike (which is not merged yet),
   where she adds the isp0 to the rk3399.dtsi file, with my addition which
   activates the mipi_dphy_rx0, adds the camera sensor to i2c1 and
   connects the pads of the ISP with the sensor. I followed the
   documentation for the ISP part and got most of the camera sensor
   parts from the BSP Kernel:
   (https://github.com/friendlyarm/kernel-rockchip/blob/nanopi4-linux-v4.4.y/arch/arm64/boot/dts/rockchip/rk3399-nanopi4-rkisp1.dtsi#L52).
2. I ported the driver from the BSP kernel of friendlyElec:
   (https://github.com/friendlyarm/kernel-rockchip/blob/nanopi4-linux-v4.4.y/drivers/media/i2c/ov13850.c)
   I changed a few lines in order to have the module compile correctly.
   ```
    +#include <linux/compat.h>
    -       sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR;
    -       ret = media_entity_init(&sd->entity, 1, &ov13850->pad, 0);
    +       sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
    +       ret = media_entity_pads_init(&sd->entity, 1, &ov13850->pad);
    ```

----------------------------------------

I was able to create an armbian image for the media_tree (https://git.linuxtv.org/media_tree.git/):
root@nanopct4:~# uname -a
Linux nanopct4 5.10.0-rc1-rockchip64 #trunk SMP PREEMPT Fri Nov 13 15:08:05 CET 2020 aarch64 GNU/Linux

When I boot up the board I can spot the following messages in the kernel
log:
[    7.216307] ov13850 1-0010: driver version: 00.01.01
[    7.216322] ov13850 1-0010: could not get module information!
[    7.216565] ov13850 1-0010: supply avdd not found, using dummy regulator
[    7.216761] ov13850 1-0010: supply dovdd not found, using dummy regulator
[    7.216846] ov13850 1-0010: supply dvdd not found, using dummy regulator
[    7.219535] ov13850 1-0010: Detected OV00d850 sensor, REVISION 0xb1
...
[    7.352292] rockchip_isp1: module is from the staging directory, the quality is unknown, you have been warned.
...
[    7.356178] rkisp1 ff910000.isp0: Adding to iommu group 4
...
[    7.357637] rkisp1: registered rkisp1_mainpath as /dev/video0
[    7.357816] rkisp1: registered rkisp1_selfpath as /dev/video1

----------------------------------------

And this command (try to stream 50 frames from video1 which the mainpath
on the RkISP1):
root@nanopct4:~# v4l2-ctl --stream-to /home/basti/test.raw --stream-mmap 50 -d /dev/video0 --verbose

I get this output:
VIDIOC_STREAMON returned -1 (No such device)

And this kernel log message:
[16939.667867] rkisp1 ff910000.isp0: No link between isp and sensor

-----------------------------------------

Here is the output for media-ctl -p:

Media controller API version 5.10.0

Media device information
------------------------
driver          rkisp1
model           rkisp1
serial          
bus info        platform:rkisp1
hw revision     0x0
driver version  5.10.0

Device topology
- entity 1: rkisp1_isp (4 pads, 4 links)
            type V4L2 subdev subtype Unknown flags 0
            device node name /dev/v4l-subdev0
	pad0: Sink
		[fmt:SRGGB10_1X10/800x600 field:none
		 crop.bounds:(0,0)/800x600
		 crop:(0,0)/800x600]
	pad1: Sink
		[fmt:unknown/0x0 field:none]
		<- "rkisp1_params":0 [ENABLED,IMMUTABLE]
	pad2: Source
		[fmt:YUYV8_2X8/800x600 field:none
		 crop.bounds:(0,0)/800x600
		 crop:(0,0)/800x600]
		-> "rkisp1_resizer_mainpath":0 [ENABLED]
		-> "rkisp1_resizer_selfpath":0 [ENABLED]
	pad3: Source
		[fmt:unknown/0x0 field:none]
		-> "rkisp1_stats":0 [ENABLED,IMMUTABLE]

- entity 6: rkisp1_resizer_mainpath (2 pads, 2 links)
            type V4L2 subdev subtype Unknown flags 0
            device node name /dev/v4l-subdev1
	pad0: Sink
		[fmt:YUYV8_2X8/800x600 field:none
		 crop.bounds:(0,0)/800x600
		 crop:(0,0)/800x600]
		<- "rkisp1_isp":2 [ENABLED]
	pad1: Source
		[fmt:YUYV8_2X8/800x600 field:none]
		-> "rkisp1_mainpath":0 [ENABLED,IMMUTABLE]

- entity 9: rkisp1_resizer_selfpath (2 pads, 2 links)
            type V4L2 subdev subtype Unknown flags 0
            device node name /dev/v4l-subdev2
	pad0: Sink
		[fmt:YUYV8_2X8/800x600 field:none
		 crop.bounds:(0,0)/800x600
		 crop:(0,0)/800x600]
		<- "rkisp1_isp":2 [ENABLED]
	pad1: Source
		[fmt:YUYV8_2X8/800x600 field:none]
		-> "rkisp1_selfpath":0 [ENABLED,IMMUTABLE]

- entity 12: rkisp1_mainpath (1 pad, 1 link)
             type Node subtype V4L flags 0
             device node name /dev/video0
	pad0: Sink
		<- "rkisp1_resizer_mainpath":1 [ENABLED,IMMUTABLE]

- entity 16: rkisp1_selfpath (1 pad, 1 link)
             type Node subtype V4L flags 0
             device node name /dev/video1
	pad0: Sink
		<- "rkisp1_resizer_selfpath":1 [ENABLED,IMMUTABLE]

- entity 20: rkisp1_stats (1 pad, 1 link)
             type Node subtype V4L flags 0
             device node name /dev/video2
	pad0: Sink
		<- "rkisp1_isp":3 [ENABLED,IMMUTABLE]

- entity 24: rkisp1_params (1 pad, 1 link)
             type Node subtype V4L flags 0
             device node name /dev/video4
	pad0: Source
		-> "rkisp1_isp":1 [ENABLED,IMMUTABLE]

----------------------------------------

I have a git repository, where my current tree is located at:
(https://github.com/initBasti/Linux_kernel_media_tree_fork)

Thank you and Greetings,
Sebastian

Comments

Ezequiel Garcia Nov. 15, 2020, 6:41 p.m. UTC | #1

On Sun, 15 Nov 2020 at 08:11, Sebastian Fricke
<[e-mail]> wrote:
>
> Hello,
>

Hello Sebastian,

Let me first add my colleagues Helen and Dafna, who maintain this driver,
and who will surely yell if I stop making sense here.

> I am currently trying to get the OV13850 camera sensor
> (https://www.friendlyarm.com/index.php?route=product/product&product_id=228) to work on my friendlyElec NanoPC-T4.
>
> I have problems with connecting the RkISP1 ISP to the OV13850 sensor and I am not sure,
> where the problem could be. The device tree seems to load correctly and
> I can detect the sensor as a device on the i2c bus:
>
> root@nanopct4:~# cat /sys/bus/i2c/devices/1-0010/name
> ov13850
>

OK, good start :-)

> And the driver module is loaded as well:
>
> root@nanopct4:~# lsmod | grep ov13850
> ov13850                28672  0
> v4l2_fwnode            28672  2 rockchip_isp1,ov13850
> videodev              266240  9 rockchip_vdec,v4l2_fwnode,rockchip_isp1,videobuf2_v4l2,hantro_vpu,rockchip_rga,videobuf2_common,v4l2_mem2mem,ov13850
> mc                     61440  8 rockchip_vdec,videodev,rockchip_isp1,videobuf2_v4l2,hantro_vpu,videobuf2_common,v4l2_mem2mem,ov13850
>
> The driver reports using dummy regulators instead of the requested ones,
> I am not sure yet if this is part of the problem, as the driver doesn't
> bail out after requesting the regulators. But from what I currently
> understand, these warnings mean that for some reason my system didn't
> map these regulators but acts as if they were there.
>
> More info below, I hope that someone can help to find the error I made,
> thanks in advance!
>
> -----------------------------
>
> I attached the two patches I created:
> 1. For the device tree I combined a patch from Helen Koike (which is not merged yet),
>    where she adds the isp0 to the rk3399.dtsi file, with my addition which
>    activates the mipi_dphy_rx0, adds the camera sensor to i2c1 and
>    connects the pads of the ISP with the sensor. I followed the
>    documentation for the ISP part and got most of the camera sensor
>    parts from the BSP Kernel:
>    (https://github.com/friendlyarm/kernel-rockchip/blob/nanopi4-linux-v4.4.y/arch/arm64/boot/dts/rockchip/rk3399-nanopi4-rkisp1.dtsi#L52).
> 2. I ported the driver from the BSP kernel of friendlyElec:
>    (https://github.com/friendlyarm/kernel-rockchip/blob/nanopi4-linux-v4.4.y/drivers/media/i2c/ov13850.c)
>    I changed a few lines in order to have the module compile correctly.
>    ```
>     +#include <linux/compat.h>
>     -       sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR;
>     -       ret = media_entity_init(&sd->entity, 1, &ov13850->pad, 0);
>     +       sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
>     +       ret = media_entity_pads_init(&sd->entity, 1, &ov13850->pad);
>     ```
>

Keep in mind that, with some exceptions, the upstream community
doesn't provide much help with downstream/vendor kernels.

> ----------------------------------------
>
> I was able to create an armbian image for the media_tree (https://git.linuxtv.org/media_tree.git/):

Ah, upstream is better :-)

> root@nanopct4:~# uname -a
> Linux nanopct4 5.10.0-rc1-rockchip64 #trunk SMP PREEMPT Fri Nov 13 15:08:05 CET 2020 aarch64 GNU/Linux
>
> When I boot up the board I can spot the following messages in the kernel
> log:
> [    7.216307] ov13850 1-0010: driver version: 00.01.01
> [    7.216322] ov13850 1-0010: could not get module information!
> [    7.216565] ov13850 1-0010: supply avdd not found, using dummy regulator
> [    7.216761] ov13850 1-0010: supply dovdd not found, using dummy regulator
> [    7.216846] ov13850 1-0010: supply dvdd not found, using dummy regulator
> [    7.219535] ov13850 1-0010: Detected OV00d850 sensor, REVISION 0xb1

OK, good.

I can be wrong (since I haven't looked at your driver) but this
usually indicates
your sensor is powered and properly configured to at least read
some CHIP_ID register.

The regulators are likely always-on in your sensor module,
so maybe probably that's why it works.

See for instance arch/arm64/boot/dts/renesas/aistarvision-mipi-adapter-2.1.dtsi
for an example of how regulators can be declared. There are other ways,
it's just an example.

> ...
> [    7.352292] rockchip_isp1: module is from the staging directory, the quality is unknown, you have been warned.
> ...
> [    7.356178] rkisp1 ff910000.isp0: Adding to iommu group 4
> ...
> [    7.357637] rkisp1: registered rkisp1_mainpath as /dev/video0
> [    7.357816] rkisp1: registered rkisp1_selfpath as /dev/video1
>
> ----------------------------------------
>
> And this command (try to stream 50 frames from video1 which the mainpath
> on the RkISP1):
> root@nanopct4:~# v4l2-ctl --stream-to /home/basti/test.raw --stream-mmap 50 -d /dev/video0 --verbose
>
> I get this output:
> VIDIOC_STREAMON returned -1 (No such device)
>
> And this kernel log message:
> [16939.667867] rkisp1 ff910000.isp0: No link between isp and sensor
>

This error seems useful. It would indicate your sensor is not
connected (software-connected) to the ISP.

See below.

> -----------------------------------------
>
> Here is the output for media-ctl -p:
>
> Media controller API version 5.10.0
>
> Media device information
> ------------------------
> driver          rkisp1
> model           rkisp1
> serial
> bus info        platform:rkisp1
> hw revision     0x0
> driver version  5.10.0
>
> Device topology
> - entity 1: rkisp1_isp (4 pads, 4 links)
>             type V4L2 subdev subtype Unknown flags 0
>             device node name /dev/v4l-subdev0
>         pad0: Sink
>                 [fmt:SRGGB10_1X10/800x600 field:none
>                  crop.bounds:(0,0)/800x600
>                  crop:(0,0)/800x600]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Note that here the rkisp1_isp entity sink pad 0
should be connected to the bayer sensor, but it
seems not connected to anything.

I can be wrong, but I don't see your sensor
appearing anywhere in the topology.

See for instance, the example in the driver
documentation:

https://www.kernel.org/doc/html/latest/admin-guide/media/rkisp1.html

And note the section where the topology is set, connecting
the imx219 sensor to rkisp1_isp sink pad0:

"media-ctl" "-d" "platform:rkisp1" "-l" "'imx219 4-0010':0 ->
'rkisp1_isp':0 [1]"

So I would say you are very much on the right track,
but you still need a bit more work to construct the capture pipeline.

Not sure if this helps, or makes things more complicated, but instead
of  v4l2-ctl, I would personally start with libcamera, and work from there.

Cheers,
Ezequiel

Helen Koike Nov. 16, 2020, 11:31 a.m. UTC | #2

Hi Sebastian,

On 11/15/20 3:41 PM, Ezequiel Garcia wrote:
> On Sun, 15 Nov 2020 at 08:11, Sebastian Fricke
> <[e-mail]> wrote:
>>
>> Hello,
>>
> 
> Hello Sebastian,
> 
> Let me first add my colleagues Helen and Dafna, who maintain this driver,
> and who will surely yell if I stop making sense here.
> 
>> I am currently trying to get the OV13850 camera sensor
>> (https://www.friendlyarm.com/index.php?route=product/product&product_id=228) to work on my friendlyElec NanoPC-T4.
>>
>> I have problems with connecting the RkISP1 ISP to the OV13850 sensor and I am not sure,
>> where the problem could be. The device tree seems to load correctly and
>> I can detect the sensor as a device on the i2c bus:
>>
>> root@nanopct4:~# cat /sys/bus/i2c/devices/1-0010/name
>> ov13850
>>
> 
> OK, good start :-)
> 
>> And the driver module is loaded as well:
>>
>> root@nanopct4:~# lsmod | grep ov13850
>> ov13850                28672  0
>> v4l2_fwnode            28672  2 rockchip_isp1,ov13850
>> videodev              266240  9 rockchip_vdec,v4l2_fwnode,rockchip_isp1,videobuf2_v4l2,hantro_vpu,rockchip_rga,videobuf2_common,v4l2_mem2mem,ov13850
>> mc                     61440  8 rockchip_vdec,videodev,rockchip_isp1,videobuf2_v4l2,hantro_vpu,videobuf2_common,v4l2_mem2mem,ov13850
>>
>> The driver reports using dummy regulators instead of the requested ones,
>> I am not sure yet if this is part of the problem, as the driver doesn't
>> bail out after requesting the regulators. But from what I currently
>> understand, these warnings mean that for some reason my system didn't
>> map these regulators but acts as if they were there.
>>
>> More info below, I hope that someone can help to find the error I made,
>> thanks in advance!
>>
>> -----------------------------
>>
>> I attached the two patches I created:
>> 1. For the device tree I combined a patch from Helen Koike (which is not merged yet),
>>    where she adds the isp0 to the rk3399.dtsi file, with my addition which
>>    activates the mipi_dphy_rx0, adds the camera sensor to i2c1 and
>>    connects the pads of the ISP with the sensor. I followed the
>>    documentation for the ISP part and got most of the camera sensor
>>    parts from the BSP Kernel:
>>    (https://github.com/friendlyarm/kernel-rockchip/blob/nanopi4-linux-v4.4.y/arch/arm64/boot/dts/rockchip/rk3399-nanopi4-rkisp1.dtsi#L52).

If you take a look at this patch:

    https://patchwork.linuxtv.org/project/linux-media/patch/[e-mail]/

You'll see that the dts of the isp has

ports {
    port@0 {
        ...
    }
}

which differ from the patch you attached, and I guess this is why your
sensor is not being detected by the rkisp1 driver.

Please check:

    https://git.linuxtv.org/media_tree.git/tree/drivers/staging/media/rkisp1/Documentation/devicetree/bindings/media/rockchip-isp1.yaml

>> 2. I ported the driver from the BSP kernel of friendlyElec:
>>    (https://github.com/friendlyarm/kernel-rockchip/blob/nanopi4-linux-v4.4.y/drivers/media/i2c/ov13850.c)
>>    I changed a few lines in order to have the module compile correctly.
>>    ```
>>     +#include <linux/compat.h>
>>     -       sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR;
>>     -       ret = media_entity_init(&sd->entity, 1, &ov13850->pad, 0);
>>     +       sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
>>     +       ret = media_entity_pads_init(&sd->entity, 1, &ov13850->pad);
>>     ```
>>
> 
> Keep in mind that, with some exceptions, the upstream community
> doesn't provide much help with downstream/vendor kernels.
> 
>> ----------------------------------------
>>
>> I was able to create an armbian image for the media_tree (https://git.linuxtv.org/media_tree.git/):
> 
> Ah, upstream is better :-)
> 
>> root@nanopct4:~# uname -a
>> Linux nanopct4 5.10.0-rc1-rockchip64 #trunk SMP PREEMPT Fri Nov 13 15:08:05 CET 2020 aarch64 GNU/Linux
>>
>> When I boot up the board I can spot the following messages in the kernel
>> log:
>> [    7.216307] ov13850 1-0010: driver version: 00.01.01
>> [    7.216322] ov13850 1-0010: could not get module information!
>> [    7.216565] ov13850 1-0010: supply avdd not found, using dummy regulator
>> [    7.216761] ov13850 1-0010: supply dovdd not found, using dummy regulator
>> [    7.216846] ov13850 1-0010: supply dvdd not found, using dummy regulator
>> [    7.219535] ov13850 1-0010: Detected OV00d850 sensor, REVISION 0xb1
> 
> OK, good.
> 
> I can be wrong (since I haven't looked at your driver) but this
> usually indicates
> your sensor is powered and properly configured to at least read
> some CHIP_ID register.
> 
> The regulators are likely always-on in your sensor module,
> so maybe probably that's why it works.
> 
> See for instance arch/arm64/boot/dts/renesas/aistarvision-mipi-adapter-2.1.dtsi
> for an example of how regulators can be declared. There are other ways,
> it's just an example.
> 
>> ...
>> [    7.352292] rockchip_isp1: module is from the staging directory, the quality is unknown, you have been warned.
>> ...
>> [    7.356178] rkisp1 ff910000.isp0: Adding to iommu group 4
>> ...
>> [    7.357637] rkisp1: registered rkisp1_mainpath as /dev/video0
>> [    7.357816] rkisp1: registered rkisp1_selfpath as /dev/video1
>>
>> ----------------------------------------
>>
>> And this command (try to stream 50 frames from video1 which the mainpath
>> on the RkISP1):
>> root@nanopct4:~# v4l2-ctl --stream-to /home/basti/test.raw --stream-mmap 50 -d /dev/video0 --verbose
>>
>> I get this output:
>> VIDIOC_STREAMON returned -1 (No such device)
>>
>> And this kernel log message:
>> [16939.667867] rkisp1 ff910000.isp0: No link between isp and sensor
>>
> 
> This error seems useful. It would indicate your sensor is not
> connected (software-connected) to the ISP.
> 
> See below.
> 
>> -----------------------------------------
>>
>> Here is the output for media-ctl -p:
>>
>> Media controller API version 5.10.0
>>
>> Media device information
>> ------------------------
>> driver          rkisp1
>> model           rkisp1
>> serial
>> bus info        platform:rkisp1
>> hw revision     0x0
>> driver version  5.10.0
>>
>> Device topology
>> - entity 1: rkisp1_isp (4 pads, 4 links)
>>             type V4L2 subdev subtype Unknown flags 0
>>             device node name /dev/v4l-subdev0
>>         pad0: Sink
>>                 [fmt:SRGGB10_1X10/800x600 field:none
>>                  crop.bounds:(0,0)/800x600
>>                  crop:(0,0)/800x600]
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> 
> Note that here the rkisp1_isp entity sink pad 0
> should be connected to the bayer sensor, but it
> seems not connected to anything.
> 
> I can be wrong, but I don't see your sensor
> appearing anywhere in the topology.
> 
> See for instance, the example in the driver
> documentation:
> 
> https://www.kernel.org/doc/html/latest/admin-guide/media/rkisp1.html

Just to complement what Ezequiel mentioned, to better understand, you can
check the topology with

    media-ctl --print-dot

and copy the results to https://dreampuf.github.io/GraphvizOnline/

You'll see there is no sensor connected in pad 0 of the rkisp1_isp node.

> 
> And note the section where the topology is set, connecting
> the imx219 sensor to rkisp1_isp sink pad0:
> 
> "media-ctl" "-d" "platform:rkisp1" "-l" "'imx219 4-0010':0 ->
> 'rkisp1_isp':0 [1]"
> 
> So I would say you are very much on the right track,
> but you still need a bit more work to construct the capture pipeline.
> 
> Not sure if this helps, or makes things more complicated, but instead
> of  v4l2-ctl, I would personally start with libcamera, and work from there.
> 
> Cheers,
> Ezequiel
> 
After correcting the topology, you should configure the stream as indicated
in the docs:

    https://www.kernel.org/doc/html/latest/admin-guide/media/rkisp1.html#capturing-video-frames-example

Or use libamera with, for instance:

    cam -c 1 -C


I hope this helps.
Regards,
Helen

Sebastian Fricke Nov. 18, 2020, 3:09 p.m. UTC | #3

[RESEND with all CC Email addresses]

On 16.11.2020 08:31, Helen Koike wrote:
>Hi Sebastian,

Hey Helen,

just wanted to leave a quick thank you for your advice!
I have left a few remarks below.

>
>On 11/15/20 3:41 PM, Ezequiel Garcia wrote:
>> On Sun, 15 Nov 2020 at 08:11, Sebastian Fricke
>> <[e-mail]> wrote:
>>>
>>> Hello,
>>>
>>
>> Hello Sebastian,
>>
>> Let me first add my colleagues Helen and Dafna, who maintain this driver,
>> and who will surely yell if I stop making sense here.
>>
>>> I am currently trying to get the OV13850 camera sensor
>>> (https://www.friendlyarm.com/index.php?route=product/product&product_id=228) to work on my friendlyElec NanoPC-T4.
>>>
>>> I have problems with connecting the RkISP1 ISP to the OV13850 sensor and I am not sure,
>>> where the problem could be. The device tree seems to load correctly and
>>> I can detect the sensor as a device on the i2c bus:
>>>
>>> root@nanopct4:~# cat /sys/bus/i2c/devices/1-0010/name
>>> ov13850
>>>
>>
>> OK, good start :-)
>>
>>> And the driver module is loaded as well:
>>>
>>> root@nanopct4:~# lsmod | grep ov13850
>>> ov13850                28672  0
>>> v4l2_fwnode            28672  2 rockchip_isp1,ov13850
>>> videodev              266240  9 rockchip_vdec,v4l2_fwnode,rockchip_isp1,videobuf2_v4l2,hantro_vpu,rockchip_rga,videobuf2_common,v4l2_mem2mem,ov13850
>>> mc                     61440  8 rockchip_vdec,videodev,rockchip_isp1,videobuf2_v4l2,hantro_vpu,videobuf2_common,v4l2_mem2mem,ov13850
>>>
>>> The driver reports using dummy regulators instead of the requested ones,
>>> I am not sure yet if this is part of the problem, as the driver doesn't
>>> bail out after requesting the regulators. But from what I currently
>>> understand, these warnings mean that for some reason my system didn't
>>> map these regulators but acts as if they were there.
>>>
>>> More info below, I hope that someone can help to find the error I made,
>>> thanks in advance!
>>>
>>> -----------------------------
>>>
>>> I attached the two patches I created:
>>> 1. For the device tree I combined a patch from Helen Koike (which is not merged yet),
>>>    where she adds the isp0 to the rk3399.dtsi file, with my addition which
>>>    activates the mipi_dphy_rx0, adds the camera sensor to i2c1 and
>>>    connects the pads of the ISP with the sensor. I followed the
>>>    documentation for the ISP part and got most of the camera sensor
>>>    parts from the BSP Kernel:
>>>    (https://github.com/friendlyarm/kernel-rockchip/blob/nanopi4-linux-v4.4.y/arch/arm64/boot/dts/rockchip/rk3399-nanopi4-rkisp1.dtsi#L52).
>
>If you take a look at this patch:
>
>    https://patchwork.linuxtv.org/project/linux-media/patch/[e-mail]/
>
>You'll see that the dts of the isp has
>
>ports {
>    port@0 {
>        ...
>    }
>}
>
>which differ from the patch you attached, and I guess this is why your
>sensor is not being detected by the rkisp1 driver.
>
>Please check:
>
>    https://git.linuxtv.org/media_tree.git/tree/drivers/staging/media/rkisp1/Documentation/devicetree/bindings/media/rockchip-isp1.yaml
>

This was exactly the problem. Thank you very much!

>>> 2. I ported the driver from the BSP kernel of friendlyElec:
>>>    (https://github.com/friendlyarm/kernel-rockchip/blob/nanopi4-linux-v4.4.y/drivers/media/i2c/ov13850.c)
>>>    I changed a few lines in order to have the module compile correctly.
>>>    ```
>>>     +#include <linux/compat.h>
>>>     -       sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR;
>>>     -       ret = media_entity_init(&sd->entity, 1, &ov13850->pad, 0);
>>>     +       sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
>>>     +       ret = media_entity_pads_init(&sd->entity, 1, &ov13850->pad);
>>>     ```
>>>
>>
>> Keep in mind that, with some exceptions, the upstream community
>> doesn't provide much help with downstream/vendor kernels.
>>
>>> ----------------------------------------
>>>
>>> I was able to create an armbian image for the media_tree (https://git.linuxtv.org/media_tree.git/):
>>
>> Ah, upstream is better :-)
>>
>>> root@nanopct4:~# uname -a
>>> Linux nanopct4 5.10.0-rc1-rockchip64 #trunk SMP PREEMPT Fri Nov 13 15:08:05 CET 2020 aarch64 GNU/Linux
>>>
>>> When I boot up the board I can spot the following messages in the kernel
>>> log:
>>> [    7.216307] ov13850 1-0010: driver version: 00.01.01
>>> [    7.216322] ov13850 1-0010: could not get module information!
>>> [    7.216565] ov13850 1-0010: supply avdd not found, using dummy regulator
>>> [    7.216761] ov13850 1-0010: supply dovdd not found, using dummy regulator
>>> [    7.216846] ov13850 1-0010: supply dvdd not found, using dummy regulator
>>> [    7.219535] ov13850 1-0010: Detected OV00d850 sensor, REVISION 0xb1
>>
>> OK, good.
>>
>> I can be wrong (since I haven't looked at your driver) but this
>> usually indicates
>> your sensor is powered and properly configured to at least read
>> some CHIP_ID register.
>>
>> The regulators are likely always-on in your sensor module,
>> so maybe probably that's why it works.
>>
>> See for instance arch/arm64/boot/dts/renesas/aistarvision-mipi-adapter-2.1.dtsi
>> for an example of how regulators can be declared. There are other ways,
>> it's just an example.
>>
>>> ...
>>> [    7.352292] rockchip_isp1: module is from the staging directory, the quality is unknown, you have been warned.
>>> ...
>>> [    7.356178] rkisp1 ff910000.isp0: Adding to iommu group 4
>>> ...
>>> [    7.357637] rkisp1: registered rkisp1_mainpath as /dev/video0
>>> [    7.357816] rkisp1: registered rkisp1_selfpath as /dev/video1
>>>
>>> ----------------------------------------
>>>
>>> And this command (try to stream 50 frames from video1 which the mainpath
>>> on the RkISP1):
>>> root@nanopct4:~# v4l2-ctl --stream-to /home/basti/test.raw --stream-mmap 50 -d /dev/video0 --verbose
>>>
>>> I get this output:
>>> VIDIOC_STREAMON returned -1 (No such device)
>>>
>>> And this kernel log message:
>>> [16939.667867] rkisp1 ff910000.isp0: No link between isp and sensor
>>>
>>
>> This error seems useful. It would indicate your sensor is not
>> connected (software-connected) to the ISP.
>>
>> See below.
>>
>>> -----------------------------------------
>>>
>>> Here is the output for media-ctl -p:
>>>
>>> Media controller API version 5.10.0
>>>
>>> Media device information
>>> ------------------------
>>> driver          rkisp1
>>> model           rkisp1
>>> serial
>>> bus info        platform:rkisp1
>>> hw revision     0x0
>>> driver version  5.10.0
>>>
>>> Device topology
>>> - entity 1: rkisp1_isp (4 pads, 4 links)
>>>             type V4L2 subdev subtype Unknown flags 0
>>>             device node name /dev/v4l-subdev0
>>>         pad0: Sink
>>>                 [fmt:SRGGB10_1X10/800x600 field:none
>>>                  crop.bounds:(0,0)/800x600
>>>                  crop:(0,0)/800x600]
>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>>
>> Note that here the rkisp1_isp entity sink pad 0
>> should be connected to the bayer sensor, but it
>> seems not connected to anything.
>>
>> I can be wrong, but I don't see your sensor
>> appearing anywhere in the topology.
>>
>> See for instance, the example in the driver
>> documentation:
>>
>> https://www.kernel.org/doc/html/latest/admin-guide/media/rkisp1.html
>
>Just to complement what Ezequiel mentioned, to better understand, you can
>check the topology with
>
>    media-ctl --print-dot
>
>and copy the results to https://dreampuf.github.io/GraphvizOnline/
>
>You'll see there is no sensor connected in pad 0 of the rkisp1_isp node.
>

Cool website didn't know it exists

>>
>> And note the section where the topology is set, connecting
>> the imx219 sensor to rkisp1_isp sink pad0:
>>
>> "media-ctl" "-d" "platform:rkisp1" "-l" "'imx219 4-0010':0 ->
>> 'rkisp1_isp':0 [1]"
>>
>> So I would say you are very much on the right track,
>> but you still need a bit more work to construct the capture pipeline.
>>
>> Not sure if this helps, or makes things more complicated, but instead
>> of  v4l2-ctl, I would personally start with libcamera, and work from there.
>>
>> Cheers,
>> Ezequiel
>>
>After correcting the topology, you should configure the stream as indicated
>in the docs:
>
>    https://www.kernel.org/doc/html/latest/admin-guide/media/rkisp1.html#capturing-video-frames-example
>

It is difficult to spot anything on the video, as it is super dark but
this works. My current efforts are focused on getting to work on the
RkISP1 IPAs so I hope to change this to the better soon. ;)

>Or use libamera with, for instance:
>
>    cam -c 1 -C
>

This sadly didn't work directly, the libcamera pipeline handler has to
be fixed as it has a maximum resolution of 4032x3024, while not
configuring the output resolution of the sensor correctly:
(This was pointed out by Laurent Pinchart on the libcamera IRC, I will try to fix this.)

basti@nanopct4:~$ LIBCAMERA_LOG_LEVELS=0 cam -c 1 -C
[0:10:02.777886361] [2102] DEBUG IPAProxy ipa_proxy.cpp:290 Registered proxy "IPAProxyLinux"
[0:10:02.778607938] [2102] DEBUG IPAProxy ipa_proxy.cpp:290 Registered proxy "IPAProxyThread"
[0:10:02.782258408] [2102] DEBUG IPAModule ipa_module.cpp:330 ipa_rkisp1.so: IPA module /usr/local/lib/aarch64-linux-gnu/libcamera/ipa_rkisp1.so is signed
[0:10:02.783011777] [2102] DEBUG IPAManager ipa_manager.cpp:238 Loaded IPA module '/usr/local/lib/aarch64-linux-gnu/libcamera/ipa_rkisp1.so'
[0:10:02.788297608] [2102] DEBUG IPAModule ipa_module.cpp:330 ipa_rpi.so: IPA module /usr/local/lib/aarch64-linux-gnu/libcamera/ipa_rpi.so is signed
[0:10:02.789237642] [2102] DEBUG IPAManager ipa_manager.cpp:238 Loaded IPA module '/usr/local/lib/aarch64-linux-gnu/libcamera/ipa_rpi.so'
[0:10:02.790346258] [2102] DEBUG IPAModule ipa_module.cpp:330 ipa_vimc.so: IPA module /usr/local/lib/aarch64-linux-gnu/libcamera/ipa_vimc.so is signed
[0:10:02.790817587] [2102] DEBUG IPAManager ipa_manager.cpp:238 Loaded IPA module '/usr/local/lib/aarch64-linux-gnu/libcamera/ipa_vimc.so'
[0:10:02.791825287] [2102]  INFO Camera camera_manager.cpp:293 libcamera v0.0.0+2030-d14a3f8a
[0:10:02.792881987] [2103] DEBUG Camera camera_manager.cpp:105 Starting camera manager
[0:10:02.817883446] [2103] DEBUG DeviceEnumerator device_enumerator.cpp:223 New media device "hantro-vpu" created from /dev/media2
[0:10:02.818795772] [2103] DEBUG DeviceEnumerator device_enumerator_udev.cpp:94 Defer media device /dev/media2 due to 2 missing dependencies
[0:10:02.823322693] [2103] DEBUG DeviceEnumerator device_enumerator_udev.cpp:319 All dependencies for media device /dev/media2 found
[0:10:02.823521900] [2103] DEBUG DeviceEnumerator device_enumerator.cpp:251 Added device /dev/media2: hantro-vpu
[0:10:02.825636174] [2103] DEBUG DeviceEnumerator device_enumerator.cpp:223 New media device "rkvdec" created from /dev/media1
[0:10:02.825903630] [2103] DEBUG DeviceEnumerator device_enumerator_udev.cpp:94 Defer media device /dev/media1 due to 1 missing dependencies
[0:10:02.827886364] [2103] DEBUG DeviceEnumerator device_enumerator_udev.cpp:319 All dependencies for media device /dev/media1 found
[0:10:02.828109487] [2103] DEBUG DeviceEnumerator device_enumerator.cpp:251 Added device /dev/media1: rkvdec
[0:10:02.830667966] [2103] DEBUG DeviceEnumerator device_enumerator.cpp:223 New media device "rkisp1" created from /dev/media0
[0:10:02.832361952] [2103] DEBUG DeviceEnumerator device_enumerator_udev.cpp:94 Defer media device /dev/media0 due to 7 missing dependencies
[0:10:02.844721516] [2103] DEBUG DeviceEnumerator device_enumerator_udev.cpp:319 All dependencies for media device /dev/media0 found
[0:10:02.844916639] [2103] DEBUG DeviceEnumerator device_enumerator.cpp:251 Added device /dev/media0: rkisp1
[0:10:02.846288920] [2103] DEBUG Camera camera_manager.cpp:148 Found registered pipeline handler 'PipelineHandlerIPU3'
[0:10:02.847350869] [2103] DEBUG Camera camera_manager.cpp:148 Found registered pipeline handler 'PipelineHandlerRPi'
[0:10:02.847648075] [2103] DEBUG Camera camera_manager.cpp:148 Found registered pipeline handler 'PipelineHandlerRkISP1'
[0:10:02.848204862] [2103] DEBUG DeviceEnumerator device_enumerator.cpp:311 Successful match for media device "rkisp1"
[0:10:02.849379686] [2103] DEBUG V4L2 v4l2_videodevice.cpp:577 /dev/video3[cap]: Opened device platform:rkisp1: rkisp1: rkisp1_stats
[0:10:02.849756516] [2103] DEBUG V4L2 v4l2_videodevice.cpp:577 /dev/video4[out]: Opened device platform:rkisp1: rkisp1: rkisp1_params
[0:10:02.850229304] [2103] DEBUG V4L2 v4l2_videodevice.cpp:577 /dev/video1[cap]: Opened device platform:rkisp1: rkisp1: rkisp1
[0:10:02.850775591] [2103] DEBUG V4L2 v4l2_videodevice.cpp:577 /dev/video2[cap]: Opened device platform:rkisp1: rkisp1: rkisp1
[0:10:02.883320946] [2103] DEBUG IPAManager ipa_manager.cpp:316 IPA module /usr/local/lib/aarch64-linux-gnu/libcamera/ipa_rkisp1.so signature is valid
[0:10:02.888229655] [2103] DEBUG Camera camera_manager.cpp:160 Pipeline handler "PipelineHandlerRkISP1" matched
[0:10:02.888665694] [2103] DEBUG Camera camera_manager.cpp:148 Found registered pipeline handler 'SimplePipelineHandler'
[0:10:02.888949483] [2103] DEBUG Camera camera_manager.cpp:148 Found registered pipeline handler 'PipelineHandlerUVC'
[0:10:02.889104648] [2103] DEBUG Camera camera_manager.cpp:148 Found registered pipeline handler 'PipelineHandlerVimc'
Using camera /base/i2c@ff110000/ov13850@10
[0:10:02.891430671] [2102] DEBUG Camera camera.cpp:771 streams configuration: (0) 1920x1920-NV12
[0:10:02.892222831] [2102]  INFO Camera camera.cpp:830 configuring streams: (0) 1920x1920-NV12
[0:10:02.893203989] [2103] DEBUG MediaDevice media_device.cpp:808 /dev/media0[rkisp1]: rkisp1_isp[2] -> rkisp1_resizer_mainpath[0]: 0
[0:10:02.893346613] [2103] DEBUG MediaDevice media_device.cpp:808 /dev/media0[rkisp1]: rkisp1_isp[2] -> rkisp1_resizer_selfpath[0]: 0
[0:10:02.893470862] [2103] DEBUG MediaDevice media_device.cpp:808 /dev/media0[rkisp1]: ov13850 1-0010[0] -> rkisp1_isp[0]: 0
[0:10:02.893602111] [2103] DEBUG RkISP1 rkisp1.cpp:997 Enabling link from sensor 'ov13850 1-0010' to ISP
[0:10:02.893698360] [2103] DEBUG MediaDevice media_device.cpp:808 /dev/media0[rkisp1]: ov13850 1-0010[0] -> rkisp1_isp[0]: 1
[0:10:02.893819401] [2103] DEBUG MediaDevice media_device.cpp:808 /dev/media0[rkisp1]: rkisp1_isp[2] -> rkisp1_resizer_mainpath[0]: 1
[0:10:02.893921775] [2103] DEBUG RkISP1 rkisp1.cpp:684 Configuring sensor with 4224x3136-SBGGR10_1X10
[0:10:02.894077815] [2103] DEBUG RkISP1 rkisp1.cpp:690 Sensor configured with 4224x3136-SBGGR10_1X10
[0:10:02.894252231] [2103] DEBUG RkISP1 rkisp1.cpp:701 ISP input pad configured with 4032x3024-SBGGR10_1X10
[0:10:02.894355771] [2103] DEBUG RkISP1 rkisp1.cpp:705 Configuring ISP output pad with 4032x3024-YUYV8_2X8
[0:10:02.894458729] [2103] DEBUG RkISP1 rkisp1.cpp:711 ISP output pad configured with 800x600-YUYV8_2X8
[0:10:02.894572770] [2103] DEBUG RkISP1 rkisp1_path.cpp:120 Configured main resizer input pad with 800x600-YUYV8_2X8
[0:10:02.894674560] [2103] DEBUG RkISP1 rkisp1_path.cpp:126 Configuring main resizer output pad with 1920x1920-YUYV8_2X8
[0:10:02.894781893] [2103] DEBUG RkISP1 rkisp1_path.cpp:144 Configured main resizer output pad with 1920x1920-YUYV8_1_5X8
[0:10:02.915852010] [2103] DEBUG V4L2 v4l2_videodevice.cpp:1137 /dev/video1[cap]: 4 buffers requested.
[0:10:02.917560871] [2103] DEBUG V4L2 v4l2_videodevice.cpp:1137 /dev/video1[cap]: 0 buffers requested.
[0:10:02.918685528] [2102] DEBUG Camera camera.cpp:967 Starting capture
[0:10:02.919501021] [2103] DEBUG V4L2 v4l2_videodevice.cpp:1137 /dev/video4[out]: 4 buffers requested.
[0:10:02.921160591] [2103] DEBUG V4L2 v4l2_videodevice.cpp:1137 /dev/video3[cap]: 4 buffers requested.
[0:10:02.923722570] [2103] DEBUG V4L2 v4l2_videodevice.cpp:1137 /dev/video1[cap]: 4 buffers requested.
[0:10:02.923808902] [2103] DEBUG V4L2 v4l2_videodevice.cpp:1350 /dev/video1[cap]: Prepared to import 4 buffers
[0:10:02.923921193] [2103] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13850 1-0010': Unable to get rectangle 1 on pad 0: Inappropriate ioctl for device
[0:10:02.924034067] [2103] ERROR CameraSensor camera_sensor.cpp:513 'ov13850 1-0010': Failed to construct camera sensor info: the camera sensor does not report the active area
[0:10:02.924062650] [2103]  WARN RkISP1 rkisp1.cpp:906 Camera sensor information not available
[0:10:02.924368606] [2103]  INFO IPARkISP1 rkisp1.cpp:115 Exposure: 4-3324 Gain: 16-248
[0:10:02.924925977] [2103] DEBUG Timer timer.cpp:105 Starting timer 0xffffb0015ea0: deadline 0:10:02.929769061
[0:10:02.925217932] [2103] DEBUG Event event_dispatcher_poll.cpp:217 timeout 0.004577378
Capture until user interrupts by SIGINT
[0:10:02.925964885] [2103] DEBUG Event event_dispatcher_poll.cpp:217 timeout 0.003814385
[0:10:02.926044509] [2103] DEBUG Event event_dispatcher_poll.cpp:217 timeout 0.003727469
[0:10:02.926105758] [2103] DEBUG Event event_dispatcher_poll.cpp:217 timeout 0.003665928
[0:10:02.926152716] [2103] DEBUG Event event_dispatcher_poll.cpp:217 timeout 0.003618970
[0:10:02.930000060] [2103] DEBUG Timer timer.cpp:105 Starting timer 0xffffb0015ea0: deadline 0:10:02.935715803
[0:10:02.930041184] [2103] DEBUG Event event_dispatcher_poll.cpp:217 timeout 0.005677244
[0:10:02.935862511] [2103] DEBUG V4L2 v4l2_videodevice.cpp:1439 /dev/video4[out]: Queueing buffer 0
[0:10:02.935981802] [2103] DEBUG V4L2 v4l2_videodevice.cpp:1439 /dev/video3[cap]: Queueing buffer 0
[0:10:02.936049759] [2103] DEBUG V4L2 v4l2_videodevice.cpp:1439 /dev/video1[cap]: Queueing buffer 0
[0:10:02.936136967] [2103] DEBUG V4L2 v4l2_videodevice.cpp:1439 /dev/video4[out]: Queueing buffer 1
[0:10:02.936177508] [2103] DEBUG V4L2 v4l2_videodevice.cpp:1439 /dev/video3[cap]: Queueing buffer 1
[0:10:02.936212508] [2103] DEBUG V4L2 v4l2_videodevice.cpp:1439 /dev/video1[cap]: Queueing buffer 1
[0:10:02.936276091] [2103] DEBUG V4L2 v4l2_videodevice.cpp:1439 /dev/video4[out]: Queueing buffer 2
[0:10:02.936310799] [2103] DEBUG V4L2 v4l2_videodevice.cpp:1439 /dev/video3[cap]: Queueing buffer 2
[0:10:02.936344049] [2103] DEBUG V4L2 v4l2_videodevice.cpp:1439 /dev/video1[cap]: Queueing buffer 2
[0:10:02.936418131] [2103] ERROR V4L2 v4l2_videodevice.cpp:1443 /dev/video1[cap]: Failed to queue buffer 2: Broken pipe
[0:10:02.936458673] [2103] DEBUG V4L2 v4l2_videodevice.cpp:1439 /dev/video4[out]: Queueing buffer 3
[0:10:02.936493089] [2103] DEBUG V4L2 v4l2_videodevice.cpp:1439 /dev/video3[cap]: Queueing buffer 3
[0:10:02.936526922] [2103] DEBUG V4L2 v4l2_videodevice.cpp:1439 /dev/video1[cap]: Queueing buffer 3
[0:10:02.936584963] [2103] ERROR V4L2 v4l2_videodevice.cpp:1443 /dev/video1[cap]: Failed to queue buffer 3: Broken pipe
^CExiting

>
>I hope this helps.
>Regards,
>Helen

Greetings,
Sebastian

Patch

From 52fb29580e679b5a400b1514c286b7aaf6ac456f Mon Sep 17 00:00:00 2001
From: Sebastian Fricke <[e-mail]>
Date: Sat, 31 Oct 2020 15:38:58 +0100
Subject: [PATCH v2] media: i2c: OV13850 image sensor support

Add support for the image sensor and the subdev driver.
Add device tree bindings.
Ported from the rockchip development tree.

Signed-off-by: Sebastian Fricke <[e-mail]>
---
 drivers/media/i2c/Kconfig             |   13 +
 drivers/media/i2c/Makefile            |    1 +
 drivers/media/i2c/ov13850.c           | 1607 +++++++++++++++++++++++++
 include/uapi/linux/rk-camera-module.h |  146 +++
 4 files changed, 1767 insertions(+)
 create mode 100644 drivers/media/i2c/ov13850.c
 create mode 100644 include/uapi/linux/rk-camera-module.h

diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 878f66ef2719..55f74398525c 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -1050,6 +1050,19 @@  config VIDEO_OV9650
 	  This is a V4L2 sensor driver for the Omnivision
 	  OV9650 and OV9652 camera sensors.
 
+config VIDEO_OV13850
+	tristate "OmniVision OV13850 sensor support"
+	depends on VIDEO_V4L2 && I2C && MEDIA_CONTROLLER
+	depends on MEDIA_CAMERA_SUPPORT
+	select V4L2_FWNODE
+	help
+	  This is a Video4Linux2 sensor-level driver for the OmniVision
+	  OV13850 camera.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ov13850.
+
+
 config VIDEO_OV13858
 	tristate "OmniVision OV13858 sensor support"
 	depends on I2C && VIDEO_V4L2
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index f0a77473979d..4cf2aecbda55 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -83,6 +83,7 @@  obj-$(CONFIG_VIDEO_OV7740) += ov7740.o
 obj-$(CONFIG_VIDEO_OV8856) += ov8856.o
 obj-$(CONFIG_VIDEO_OV9640) += ov9640.o
 obj-$(CONFIG_VIDEO_OV9650) += ov9650.o
+obj-$(CONFIG_VIDEO_OV13850) += ov13850.o
 obj-$(CONFIG_VIDEO_OV13858) += ov13858.o
 obj-$(CONFIG_VIDEO_MT9M001) += mt9m001.o
 obj-$(CONFIG_VIDEO_MT9M032) += mt9m032.o
diff --git a/drivers/media/i2c/ov13850.c b/drivers/media/i2c/ov13850.c
new file mode 100644
index 000000000000..5dca59ef7e47
--- /dev/null
+++ b/drivers/media/i2c/ov13850.c
@@ -0,0 +1,1607 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ov13850 driver
+ *
+ * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd.
+ *
+ * V0.0X01.0X01 add poweron function.
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/sysfs.h>
+#include <linux/slab.h>
+#include <linux/version.h>
+#include <linux/rk-camera-module.h>
+#include <media/media-entity.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-subdev.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/compat.h>
+
+#define DRIVER_VERSION			KERNEL_VERSION(0, 0x01, 0x01)
+
+#ifndef V4L2_CID_DIGITAL_GAIN
+#define V4L2_CID_DIGITAL_GAIN		V4L2_CID_GAIN
+#endif
+
+#define OV13850_LINK_FREQ_300MHZ	300000000
+/* pixel rate = link frequency * 2 * lanes / BITS_PER_SAMPLE */
+#define OV13850_PIXEL_RATE		(OV13850_LINK_FREQ_300MHZ * 2 * 2 / 10)
+#define OV13850_XVCLK_FREQ		24000000
+
+#define CHIP_ID				0x00d850
+#define OV13850_REG_CHIP_ID		0x300a
+
+#define OV13850_REG_CTRL_MODE		0x0100
+#define OV13850_MODE_SW_STANDBY		0x0
+#define OV13850_MODE_STREAMING		BIT(0)
+
+#define OV13850_REG_EXPOSURE		0x3500
+#define	OV13850_EXPOSURE_MIN		4
+#define	OV13850_EXPOSURE_STEP		1
+#define OV13850_VTS_MAX			0x7fff
+
+#define OV13850_REG_GAIN_H		0x350a
+#define OV13850_REG_GAIN_L		0x350b
+#define OV13850_GAIN_H_MASK		0x07
+#define OV13850_GAIN_H_SHIFT		8
+#define OV13850_GAIN_L_MASK		0xff
+#define OV13850_GAIN_MIN		0x10
+#define OV13850_GAIN_MAX		0xf8
+#define OV13850_GAIN_STEP		1
+#define OV13850_GAIN_DEFAULT		0x10
+
+#define OV13850_REG_TEST_PATTERN	0x5e00
+#define	OV13850_TEST_PATTERN_ENABLE	0x80
+#define	OV13850_TEST_PATTERN_DISABLE	0x0
+
+#define OV13850_REG_VTS			0x380e
+
+#define REG_NULL			0xFFFF
+
+#define OV13850_REG_VALUE_08BIT		1
+#define OV13850_REG_VALUE_16BIT		2
+#define OV13850_REG_VALUE_24BIT		3
+
+#define OV13850_LANES			2
+#define OV13850_BITS_PER_SAMPLE		10
+
+#define OV13850_CHIP_REVISION_REG	0x302A
+#define OV13850_R1A			0xb1
+#define OV13850_R2A			0xb2
+
+#define OF_CAMERA_PINCTRL_STATE_DEFAULT	"rockchip,camera_default"
+#define OF_CAMERA_PINCTRL_STATE_SLEEP	"rockchip,camera_sleep"
+
+#define OV13850_NAME			"ov13850"
+
+static const struct regval *ov13850_global_regs;
+
+static const char * const ov13850_supply_names[] = {
+	"avdd",		/* Analog power */
+	"dovdd",	/* Digital I/O power */
+	"dvdd",		/* Digital core power */
+};
+
+#define OV13850_NUM_SUPPLIES ARRAY_SIZE(ov13850_supply_names)
+
+struct regval {
+	u16 addr;
+	u8 val;
+};
+
+struct ov13850_mode {
+	u32 width;
+	u32 height;
+	struct v4l2_fract max_fps;
+	u32 hts_def;
+	u32 vts_def;
+	u32 exp_def;
+	const struct regval *reg_list;
+};
+
+struct ov13850 {
+	struct i2c_client	*client;
+	struct clk		*xvclk;
+	struct gpio_desc	*reset_gpio;
+	struct gpio_desc	*pwdn_gpio;
+	struct regulator_bulk_data supplies[OV13850_NUM_SUPPLIES];
+
+	struct pinctrl		*pinctrl;
+	struct pinctrl_state	*pins_default;
+	struct pinctrl_state	*pins_sleep;
+
+	struct v4l2_subdev	subdev;
+	struct media_pad	pad;
+	struct v4l2_ctrl_handler ctrl_handler;
+	struct v4l2_ctrl	*exposure;
+	struct v4l2_ctrl	*anal_gain;
+	struct v4l2_ctrl	*digi_gain;
+	struct v4l2_ctrl	*hblank;
+	struct v4l2_ctrl	*vblank;
+	struct v4l2_ctrl	*test_pattern;
+	struct mutex		mutex;
+	bool			streaming;
+	bool			power_on;
+	const struct ov13850_mode *cur_mode;
+	u32			module_index;
+	const char		*module_facing;
+	const char		*module_name;
+	const char		*len_name;
+};
+
+#define to_ov13850(sd) container_of(sd, struct ov13850, subdev)
+
+/*
+ * Xclk 24Mhz
+ */
+static const struct regval ov13850_global_regs_r1a[] = {
+	{0x0103, 0x01},
+	{0x0300, 0x00},
+	{0x0301, 0x00},
+	{0x0302, 0x32},
+	{0x0303, 0x01},
+	{0x030a, 0x00},
+	{0x300f, 0x11},
+	{0x3010, 0x01},
+	{0x3011, 0x76},
+	{0x3012, 0x21},
+	{0x3013, 0x12},
+	{0x3014, 0x11},
+	{0x3015, 0xc0},
+	{0x301f, 0x03},
+	{0x3106, 0x00},
+	{0x3210, 0x47},
+	{0x3500, 0x00},
+	{0x3501, 0x60},
+	{0x3502, 0x00},
+	{0x3506, 0x00},
+	{0x3507, 0x02},
+	{0x3508, 0x00},
+	{0x350a, 0x00},
+	{0x350b, 0x80},
+	{0x350e, 0x00},
+	{0x350f, 0x10},
+	{0x3600, 0x40},
+	{0x3601, 0xfc},
+	{0x3602, 0x02},
+	{0x3603, 0x48},
+	{0x3604, 0xa5},
+	{0x3605, 0x9f},
+	{0x3607, 0x00},
+	{0x360a, 0x40},
+	{0x360b, 0x91},
+	{0x360c, 0x49},
+	{0x360f, 0x8a},
+	{0x3611, 0x10},
+	{0x3612, 0x27},
+	{0x3613, 0x33},
+	{0x3615, 0x08},
+	{0x3641, 0x02},
+	{0x3660, 0x82},
+	{0x3668, 0x54},
+	{0x3669, 0x40},
+	{0x3667, 0xa0},
+	{0x3702, 0x40},
+	{0x3703, 0x44},
+	{0x3704, 0x2c},
+	{0x3705, 0x24},
+	{0x3706, 0x50},
+	{0x3707, 0x44},
+	{0x3708, 0x3c},
+	{0x3709, 0x1f},
+	{0x370a, 0x26},
+	{0x370b, 0x3c},
+	{0x3720, 0x66},
+	{0x3722, 0x84},
+	{0x3728, 0x40},
+	{0x372a, 0x00},
+	{0x372f, 0x90},
+	{0x3710, 0x28},
+	{0x3716, 0x03},
+	{0x3718, 0x10},
+	{0x3719, 0x08},
+	{0x371c, 0xfc},
+	{0x3760, 0x13},
+	{0x3761, 0x34},
+	{0x3767, 0x24},
+	{0x3768, 0x06},
+	{0x3769, 0x45},
+	{0x376c, 0x23},
+	{0x3d84, 0x00},
+	{0x3d85, 0x17},
+	{0x3d8c, 0x73},
+	{0x3d8d, 0xbf},
+	{0x3800, 0x00},
+	{0x3801, 0x08},
+	{0x3802, 0x00},
+	{0x3803, 0x04},
+	{0x3804, 0x10},
+	{0x3805, 0x97},
+	{0x3806, 0x0c},
+	{0x3807, 0x4b},
+	{0x3808, 0x08},
+	{0x3809, 0x40},
+	{0x380a, 0x06},
+	{0x380b, 0x20},
+	{0x380c, 0x12},
+	{0x380d, 0xc0},
+	{0x380e, 0x06},
+	{0x380f, 0x80},
+	{0x3810, 0x00},
+	{0x3811, 0x04},
+	{0x3812, 0x00},
+	{0x3813, 0x02},
+	{0x3814, 0x31},
+	{0x3815, 0x31},
+	{0x3820, 0x02},
+	{0x3821, 0x05},
+	{0x3834, 0x00},
+	{0x3835, 0x1c},
+	{0x3836, 0x08},
+	{0x3837, 0x02},
+	{0x4000, 0xf1},
+	{0x4001, 0x00},
+	{0x400b, 0x0c},
+	{0x4011, 0x00},
+	{0x401a, 0x00},
+	{0x401b, 0x00},
+	{0x401c, 0x00},
+	{0x401d, 0x00},
+	{0x4020, 0x00},
+	{0x4021, 0xE4},
+	{0x4022, 0x07},
+	{0x4023, 0x5F},
+	{0x4024, 0x08},
+	{0x4025, 0x44},
+	{0x4026, 0x08},
+	{0x4027, 0x47},
+	{0x4028, 0x00},
+	{0x4029, 0x02},
+	{0x402a, 0x04},
+	{0x402b, 0x08},
+	{0x402c, 0x02},
+	{0x402d, 0x02},
+	{0x402e, 0x0c},
+	{0x402f, 0x08},
+	{0x403d, 0x2c},
+	{0x403f, 0x7f},
+	{0x4500, 0x82},
+	{0x4501, 0x38},
+	{0x4601, 0x04},
+	{0x4602, 0x22},
+	{0x4603, 0x01},
+	{0x4837, 0x1b},
+	{0x4d00, 0x04},
+	{0x4d01, 0x42},
+	{0x4d02, 0xd1},
+	{0x4d03, 0x90},
+	{0x4d04, 0x66},
+	{0x4d05, 0x65},
+	{0x5000, 0x0e},
+	{0x5001, 0x01},
+	{0x5002, 0x07},
+	{0x5013, 0x40},
+	{0x501c, 0x00},
+	{0x501d, 0x10},
+	{0x5242, 0x00},
+	{0x5243, 0xb8},
+	{0x5244, 0x00},
+	{0x5245, 0xf9},
+	{0x5246, 0x00},
+	{0x5247, 0xf6},
+	{0x5248, 0x00},
+	{0x5249, 0xa6},
+	{0x5300, 0xfc},
+	{0x5301, 0xdf},
+	{0x5302, 0x3f},
+	{0x5303, 0x08},
+	{0x5304, 0x0c},
+	{0x5305, 0x10},
+	{0x5306, 0x20},
+	{0x5307, 0x40},
+	{0x5308, 0x08},
+	{0x5309, 0x08},
+	{0x530a, 0x02},
+	{0x530b, 0x01},
+	{0x530c, 0x01},
+	{0x530d, 0x0c},
+	{0x530e, 0x02},
+	{0x530f, 0x01},
+	{0x5310, 0x01},
+	{0x5400, 0x00},
+	{0x5401, 0x61},
+	{0x5402, 0x00},
+	{0x5403, 0x00},
+	{0x5404, 0x00},
+	{0x5405, 0x40},
+	{0x540c, 0x05},
+	{0x5b00, 0x00},
+	{0x5b01, 0x00},
+	{0x5b02, 0x01},
+	{0x5b03, 0xff},
+	{0x5b04, 0x02},
+	{0x5b05, 0x6c},
+	{0x5b09, 0x02},
+	{0x5e00, 0x00},
+	{0x5e10, 0x1c},
+	{REG_NULL, 0x00},
+};
+
+/*
+ * Xclk 24Mhz
+ */
+static const struct regval ov13850_global_regs_r2a[] = {
+	{0x0300, 0x01},
+	{0x0301, 0x00},
+	{0x0302, 0x28},
+	{0x0303, 0x00},
+	{0x030a, 0x00},
+	{0x300f, 0x11},
+	{0x3010, 0x01},
+	{0x3011, 0x76},
+	{0x3012, 0x21},
+	{0x3013, 0x12},
+	{0x3014, 0x11},
+	{0x301f, 0x03},
+	{0x3106, 0x00},
+	{0x3210, 0x47},
+	{0x3500, 0x00},
+	{0x3501, 0x60},
+	{0x3502, 0x00},
+	{0x3506, 0x00},
+	{0x3507, 0x02},
+	{0x3508, 0x00},
+	{0x350a, 0x00},
+	{0x350b, 0x80},
+	{0x350e, 0x00},
+	{0x350f, 0x10},
+	{0x351a, 0x00},
+	{0x351b, 0x10},
+	{0x351c, 0x00},
+	{0x351d, 0x20},
+	{0x351e, 0x00},
+	{0x351f, 0x40},
+	{0x3520, 0x00},
+	{0x3521, 0x80},
+	{0x3600, 0xc0},
+	{0x3601, 0xfc},
+	{0x3602, 0x02},
+	{0x3603, 0x78},
+	{0x3604, 0xb1},
+	{0x3605, 0xb5},
+	{0x3606, 0x73},
+	{0x3607, 0x07},
+	{0x3609, 0x40},
+	{0x360a, 0x30},
+	{0x360b, 0x91},
+	{0x360c, 0x09},
+	{0x360f, 0x02},
+	{0x3611, 0x10},
+	{0x3612, 0x27},
+	{0x3613, 0x33},
+	{0x3615, 0x0c},
+	{0x3616, 0x0e},
+	{0x3641, 0x02},
+	{0x3660, 0x82},
+	{0x3668, 0x54},
+	{0x3669, 0x00},
+	{0x366a, 0x3f},
+	{0x3667, 0xa0},
+	{0x3702, 0x40},
+	{0x3703, 0x44},
+	{0x3704, 0x2c},
+	{0x3705, 0x01},
+	{0x3706, 0x15},
+	{0x3707, 0x44},
+	{0x3708, 0x3c},
+	{0x3709, 0x1f},
+	{0x370a, 0x27},
+	{0x370b, 0x3c},
+	{0x3720, 0x55},
+	{0x3722, 0x84},
+	{0x3728, 0x40},
+	{0x372a, 0x00},
+	{0x372b, 0x02},
+	{0x372e, 0x22},
+	{0x372f, 0x90},
+	{0x3730, 0x00},
+	{0x3731, 0x00},
+	{0x3732, 0x00},
+	{0x3733, 0x00},
+	{0x3710, 0x28},
+	{0x3716, 0x03},
+	{0x3718, 0x10},
+	{0x3719, 0x0c},
+	{0x371a, 0x08},
+	{0x371c, 0xfc},
+	{0x3748, 0x00},
+	{0x3760, 0x13},
+	{0x3761, 0x33},
+	{0x3762, 0x86},
+	{0x3763, 0x16},
+	{0x3767, 0x24},
+	{0x3768, 0x06},
+	{0x3769, 0x45},
+	{0x376c, 0x23},
+	{0x376f, 0x80},
+	{0x3773, 0x06},
+	{0x3d84, 0x00},
+	{0x3d85, 0x17},
+	{0x3d8c, 0x73},
+	{0x3d8d, 0xbf},
+	{0x3800, 0x00},
+	{0x3801, 0x08},
+	{0x3802, 0x00},
+	{0x3803, 0x04},
+	{0x3804, 0x10},
+	{0x3805, 0x97},
+	{0x3806, 0x0c},
+	{0x3807, 0x4b},
+	{0x3808, 0x08},
+	{0x3809, 0x40},
+	{0x380a, 0x06},
+	{0x380b, 0x20},
+	{0x380c, 0x12},
+	{0x380d, 0xc0},
+	{0x380e, 0x06},
+	{0x380f, 0x80},
+	{0x3810, 0x00},
+	{0x3811, 0x04},
+	{0x3812, 0x00},
+	{0x3813, 0x02},
+	{0x3814, 0x31},
+	{0x3815, 0x31},
+	{0x3820, 0x02},
+	{0x3821, 0x06},
+	{0x3823, 0x00},
+	{0x3826, 0x00},
+	{0x3827, 0x02},
+	{0x3834, 0x00},
+	{0x3835, 0x1c},
+	{0x3836, 0x08},
+	{0x3837, 0x02},
+	{0x4000, 0xf1},
+	{0x4001, 0x00},
+	{0x4006, 0x04},
+	{0x4007, 0x04},
+	{0x400b, 0x0c},
+	{0x4011, 0x00},
+	{0x401a, 0x00},
+	{0x401b, 0x00},
+	{0x401c, 0x00},
+	{0x401d, 0x00},
+	{0x4020, 0x00},
+	{0x4021, 0xe4},
+	{0x4022, 0x04},
+	{0x4023, 0xd7},
+	{0x4024, 0x05},
+	{0x4025, 0xbc},
+	{0x4026, 0x05},
+	{0x4027, 0xbf},
+	{0x4028, 0x00},
+	{0x4029, 0x02},
+	{0x402a, 0x04},
+	{0x402b, 0x08},
+	{0x402c, 0x02},
+	{0x402d, 0x02},
+	{0x402e, 0x0c},
+	{0x402f, 0x08},
+	{0x403d, 0x2c},
+	{0x403f, 0x7f},
+	{0x4041, 0x07},
+	{0x4500, 0x82},
+	{0x4501, 0x3c},
+	{0x458b, 0x00},
+	{0x459c, 0x00},
+	{0x459d, 0x00},
+	{0x459e, 0x00},
+	{0x4601, 0x83},
+	{0x4602, 0x22},
+	{0x4603, 0x01},
+	{0x4837, 0x19},
+	{0x4d00, 0x04},
+	{0x4d01, 0x42},
+	{0x4d02, 0xd1},
+	{0x4d03, 0x90},
+	{0x4d04, 0x66},
+	{0x4d05, 0x65},
+	{0x4d0b, 0x00},
+	{0x5000, 0x0e},
+	{0x5001, 0x01},
+	{0x5002, 0x07},
+	{0x5013, 0x40},
+	{0x501c, 0x00},
+	{0x501d, 0x10},
+	{0x510f, 0xfc},
+	{0x5110, 0xf0},
+	{0x5111, 0x10},
+	{0x536d, 0x02},
+	{0x536e, 0x67},
+	{0x536f, 0x01},
+	{0x5370, 0x4c},
+	{0x5400, 0x00},
+	{0x5400, 0x00},
+	{0x5401, 0x61},
+	{0x5402, 0x00},
+	{0x5403, 0x00},
+	{0x5404, 0x00},
+	{0x5405, 0x40},
+	{0x540c, 0x05},
+	{0x5501, 0x00},
+	{0x5b00, 0x00},
+	{0x5b01, 0x00},
+	{0x5b02, 0x01},
+	{0x5b03, 0xff},
+	{0x5b04, 0x02},
+	{0x5b05, 0x6c},
+	{0x5b09, 0x02},
+	{0x5e00, 0x00},
+	{0x5e10, 0x1c},
+	{REG_NULL, 0x00},
+};
+
+/*
+ * Xclk 24Mhz
+ * max_framerate 30fps
+ * mipi_datarate per lane 600Mbps
+ */
+static const struct regval ov13850_2112x1568_regs[] = {
+	{0x3612, 0x27},
+	{0x370a, 0x26},
+	{0x372a, 0x00},
+	{0x372f, 0x90},
+	{0x3801, 0x08},
+	{0x3805, 0x97},
+	{0x3807, 0x4b},
+	{0x3808, 0x08},
+	{0x3809, 0x40},
+	{0x380a, 0x06},
+	{0x380b, 0x20},
+	{0x380c, 0x12},
+	{0x380d, 0xc0},
+	{0x380e, 0x06},
+	{0x380f, 0x80},
+	{0x3813, 0x02},
+	{0x3814, 0x31},
+	{0x3815, 0x31},
+	{0x3820, 0x02},
+	{0x3821, 0x05},
+	{0x3836, 0x08},
+	{0x3837, 0x02},
+	{0x4601, 0x04},
+	{0x4603, 0x00},
+	{0x4020, 0x00},
+	{0x4021, 0xE4},
+	{0x4022, 0x07},
+	{0x4023, 0x5F},
+	{0x4024, 0x08},
+	{0x4025, 0x44},
+	{0x4026, 0x08},
+	{0x4027, 0x47},
+	{0x4603, 0x01},
+	{0x5401, 0x61},
+	{0x5405, 0x40},
+	{REG_NULL, 0x00},
+};
+
+/*
+ * Xclk 24Mhz
+ * max_framerate 7fps
+ * mipi_datarate per lane 600Mbps
+ */
+static const struct regval ov13850_4224x3136_regs[] = {
+	{0x3612, 0x2f},
+	{0x370a, 0x24},
+	{0x372a, 0x04},
+	{0x372f, 0xa0},
+	{0x3801, 0x0C},
+	{0x3805, 0x93},
+	{0x3807, 0x4B},
+	{0x3808, 0x10},
+	{0x3809, 0x80},
+	{0x380a, 0x0c},
+	{0x380b, 0x40},
+	{0x380e, 0x0d},
+	{0x380f, 0x00},
+	{0x3813, 0x04},
+	{0x3814, 0x11},
+	{0x3815, 0x11},
+	{0x3820, 0x00},
+	{0x3821, 0x04},
+	{0x3836, 0x04},
+	{0x3837, 0x01},
+	{0x4601, 0x87},
+	{0x4603, 0x01},
+	{0x4020, 0x02},
+	{0x4021, 0x4C},
+	{0x4022, 0x0E},
+	{0x4023, 0x37},
+	{0x4024, 0x0F},
+	{0x4025, 0x1C},
+	{0x4026, 0x0F},
+	{0x4027, 0x1F},
+	{0x4603, 0x00},
+	{0x5401, 0x71},
+	{0x5405, 0x80},
+	{REG_NULL, 0x00},
+};
+
+static const struct ov13850_mode supported_modes[] = {
+	{
+		.width = 2112,
+		.height = 1568,
+		.max_fps = {
+			.numerator = 10000,
+			.denominator = 300000,
+		},
+		.exp_def = 0x0600,
+		.hts_def = 0x12c0,
+		.vts_def = 0x0680,
+		.reg_list = ov13850_2112x1568_regs,
+	},{
+		.width = 4224,
+		.height = 3136,
+		.max_fps = {
+			.numerator = 20000,
+			.denominator = 150000,
+		},
+		.exp_def = 0x0600,
+		.hts_def = 0x12c0,
+		.vts_def = 0x0d00,
+		.reg_list = ov13850_4224x3136_regs,
+	},
+};
+
+static const s64 link_freq_menu_items[] = {
+	OV13850_LINK_FREQ_300MHZ
+};
+
+static const char * const ov13850_test_pattern_menu[] = {
+	"Disabled",
+	"Vertical Color Bar Type 1",
+	"Vertical Color Bar Type 2",
+	"Vertical Color Bar Type 3",
+	"Vertical Color Bar Type 4"
+};
+
+/* Write registers up to 4 at a time */
+static int ov13850_write_reg(struct i2c_client *client, u16 reg,
+			     u32 len, u32 val)
+{
+	u32 buf_i, val_i;
+	u8 buf[6];
+	u8 *val_p;
+	__be32 val_be;
+
+	if (len > 4)
+		return -EINVAL;
+
+	buf[0] = reg >> 8;
+	buf[1] = reg & 0xff;
+
+	val_be = cpu_to_be32(val);
+	val_p = (u8 *)&val_be;
+	buf_i = 2;
+	val_i = 4 - len;
+
+	while (val_i < 4)
+		buf[buf_i++] = val_p[val_i++];
+
+	if (i2c_master_send(client, buf, len + 2) != len + 2)
+		return -EIO;
+
+	return 0;
+}
+
+static int ov13850_write_array(struct i2c_client *client,
+			       const struct regval *regs)
+{
+	u32 i;
+	int ret = 0;
+
+	for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++)
+		ret = ov13850_write_reg(client, regs[i].addr,
+					OV13850_REG_VALUE_08BIT,
+					regs[i].val);
+
+	return ret;
+}
+
+/* Read registers up to 4 at a time */
+static int ov13850_read_reg(struct i2c_client *client, u16 reg,
+			    unsigned int len, u32 *val)
+{
+	struct i2c_msg msgs[2];
+	u8 *data_be_p;
+	__be32 data_be = 0;
+	__be16 reg_addr_be = cpu_to_be16(reg);
+	int ret;
+
+	if (len > 4 || !len)
+		return -EINVAL;
+
+	data_be_p = (u8 *)&data_be;
+	/* Write register address */
+	msgs[0].addr = client->addr;
+	msgs[0].flags = 0;
+	msgs[0].len = 2;
+	msgs[0].buf = (u8 *)&reg_addr_be;
+
+	/* Read data from register */
+	msgs[1].addr = client->addr;
+	msgs[1].flags = I2C_M_RD;
+	msgs[1].len = len;
+	msgs[1].buf = &data_be_p[4 - len];
+
+	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+	if (ret != ARRAY_SIZE(msgs))
+		return -EIO;
+
+	*val = be32_to_cpu(data_be);
+
+	return 0;
+}
+
+static int ov13850_get_reso_dist(const struct ov13850_mode *mode,
+				 struct v4l2_mbus_framefmt *framefmt)
+{
+	return abs(mode->width - framefmt->width) +
+	       abs(mode->height - framefmt->height);
+}
+
+static const struct ov13850_mode *
+ov13850_find_best_fit(struct v4l2_subdev_format *fmt)
+{
+	struct v4l2_mbus_framefmt *framefmt = &fmt->format;
+	int dist;
+	int cur_best_fit = 0;
+	int cur_best_fit_dist = -1;
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(supported_modes); i++) {
+		dist = ov13850_get_reso_dist(&supported_modes[i], framefmt);
+		if (cur_best_fit_dist == -1 || dist < cur_best_fit_dist) {
+			cur_best_fit_dist = dist;
+			cur_best_fit = i;
+		}
+	}
+
+	return &supported_modes[cur_best_fit];
+}
+
+static int ov13850_set_fmt(struct v4l2_subdev *sd,
+			   struct v4l2_subdev_pad_config *cfg,
+			  struct v4l2_subdev_format *fmt)
+{
+	struct ov13850 *ov13850 = to_ov13850(sd);
+	const struct ov13850_mode *mode;
+	s64 h_blank, vblank_def;
+
+	mutex_lock(&ov13850->mutex);
+
+	mode = ov13850_find_best_fit(fmt);
+	fmt->format.code = MEDIA_BUS_FMT_SBGGR10_1X10;
+	fmt->format.width = mode->width;
+	fmt->format.height = mode->height;
+	fmt->format.field = V4L2_FIELD_NONE;
+	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
+		*v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format;
+#else
+		mutex_unlock(&ov13850->mutex);
+		return -ENOTTY;
+#endif
+	} else {
+		ov13850->cur_mode = mode;
+		h_blank = mode->hts_def - mode->width;
+		__v4l2_ctrl_modify_range(ov13850->hblank, h_blank,
+					 h_blank, 1, h_blank);
+		vblank_def = mode->vts_def - mode->height;
+		__v4l2_ctrl_modify_range(ov13850->vblank, vblank_def,
+					 OV13850_VTS_MAX - mode->height,
+					 1, vblank_def);
+	}
+
+	mutex_unlock(&ov13850->mutex);
+
+	return 0;
+}
+
+static int ov13850_get_fmt(struct v4l2_subdev *sd,
+			   struct v4l2_subdev_pad_config *cfg,
+			   struct v4l2_subdev_format *fmt)
+{
+	struct ov13850 *ov13850 = to_ov13850(sd);
+	const struct ov13850_mode *mode = ov13850->cur_mode;
+
+	mutex_lock(&ov13850->mutex);
+	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
+		fmt->format = *v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
+#else
+		mutex_unlock(&ov13850->mutex);
+		return -ENOTTY;
+#endif
+	} else {
+		fmt->format.width = mode->width;
+		fmt->format.height = mode->height;
+		fmt->format.code = MEDIA_BUS_FMT_SBGGR10_1X10;
+		fmt->format.field = V4L2_FIELD_NONE;
+	}
+	mutex_unlock(&ov13850->mutex);
+
+	return 0;
+}
+
+static int ov13850_enum_mbus_code(struct v4l2_subdev *sd,
+				  struct v4l2_subdev_pad_config *cfg,
+				  struct v4l2_subdev_mbus_code_enum *code)
+{
+	if (code->index != 0)
+		return -EINVAL;
+	code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
+
+	return 0;
+}
+
+static int ov13850_enum_frame_sizes(struct v4l2_subdev *sd,
+				    struct v4l2_subdev_pad_config *cfg,
+				   struct v4l2_subdev_frame_size_enum *fse)
+{
+	if (fse->index >= ARRAY_SIZE(supported_modes))
+		return -EINVAL;
+
+	if (fse->code != MEDIA_BUS_FMT_SBGGR10_1X10)
+		return -EINVAL;
+
+	fse->min_width  = supported_modes[fse->index].width;
+	fse->max_width  = supported_modes[fse->index].width;
+	fse->max_height = supported_modes[fse->index].height;
+	fse->min_height = supported_modes[fse->index].height;
+
+	return 0;
+}
+
+static int ov13850_enable_test_pattern(struct ov13850 *ov13850, u32 pattern)
+{
+	u32 val;
+
+	if (pattern)
+		val = (pattern - 1) | OV13850_TEST_PATTERN_ENABLE;
+	else
+		val = OV13850_TEST_PATTERN_DISABLE;
+
+	return ov13850_write_reg(ov13850->client,
+				 OV13850_REG_TEST_PATTERN,
+				 OV13850_REG_VALUE_08BIT,
+				 val);
+}
+
+static int ov13850_g_frame_interval(struct v4l2_subdev *sd,
+				    struct v4l2_subdev_frame_interval *fi)
+{
+	struct ov13850 *ov13850 = to_ov13850(sd);
+	const struct ov13850_mode *mode = ov13850->cur_mode;
+
+	mutex_lock(&ov13850->mutex);
+	fi->interval = mode->max_fps;
+	mutex_unlock(&ov13850->mutex);
+
+	return 0;
+}
+
+static void ov13850_get_module_inf(struct ov13850 *ov13850,
+				   struct rkmodule_inf *inf)
+{
+	memset(inf, 0, sizeof(*inf));
+	strlcpy(inf->base.sensor, OV13850_NAME, sizeof(inf->base.sensor));
+	strlcpy(inf->base.module, ov13850->module_name,
+		sizeof(inf->base.module));
+	strlcpy(inf->base.lens, ov13850->len_name, sizeof(inf->base.lens));
+}
+
+static long ov13850_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
+{
+	struct ov13850 *ov13850 = to_ov13850(sd);
+	long ret = 0;
+
+	switch (cmd) {
+	case RKMODULE_GET_MODULE_INFO:
+		if (ov13850->module_name)
+			ov13850_get_module_inf(ov13850, (struct rkmodule_inf *)arg);
+		else
+			ret = -ENOIOCTLCMD;
+		break;
+	default:
+		ret = -ENOIOCTLCMD;
+		break;
+	}
+
+	return ret;
+}
+
+#ifdef CONFIG_COMPAT
+static long ov13850_compat_ioctl32(struct v4l2_subdev *sd,
+				   unsigned int cmd, unsigned long arg)
+{
+	void __user *up = compat_ptr(arg);
+	struct rkmodule_inf *inf;
+	struct rkmodule_awb_cfg *cfg;
+	long ret;
+
+	switch (cmd) {
+	case RKMODULE_GET_MODULE_INFO:
+		inf = kzalloc(sizeof(*inf), GFP_KERNEL);
+		if (!inf) {
+			ret = -ENOMEM;
+			return ret;
+		}
+
+		ret = ov13850_ioctl(sd, cmd, inf);
+		if (!ret)
+			ret = copy_to_user(up, inf, sizeof(*inf));
+		kfree(inf);
+		break;
+	case RKMODULE_AWB_CFG:
+		cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
+		if (!cfg) {
+			ret = -ENOMEM;
+			return ret;
+		}
+
+		ret = copy_from_user(cfg, up, sizeof(*cfg));
+		if (!ret)
+			ret = ov13850_ioctl(sd, cmd, cfg);
+		kfree(cfg);
+		break;
+	default:
+		ret = -ENOIOCTLCMD;
+		break;
+	}
+
+	return ret;
+}
+#endif
+
+static int __ov13850_start_stream(struct ov13850 *ov13850)
+{
+	int ret;
+
+	ret = ov13850_write_array(ov13850->client, ov13850->cur_mode->reg_list);
+	if (ret)
+		return ret;
+
+	/* In case these controls are set before streaming */
+	mutex_unlock(&ov13850->mutex);
+	ret = v4l2_ctrl_handler_setup(&ov13850->ctrl_handler);
+	mutex_lock(&ov13850->mutex);
+	if (ret)
+		return ret;
+
+	return ov13850_write_reg(ov13850->client,
+				 OV13850_REG_CTRL_MODE,
+				 OV13850_REG_VALUE_08BIT,
+				 OV13850_MODE_STREAMING);
+}
+
+static int __ov13850_stop_stream(struct ov13850 *ov13850)
+{
+	return ov13850_write_reg(ov13850->client,
+				 OV13850_REG_CTRL_MODE,
+				 OV13850_REG_VALUE_08BIT,
+				 OV13850_MODE_SW_STANDBY);
+}
+
+static int ov13850_s_stream(struct v4l2_subdev *sd, int on)
+{
+	struct ov13850 *ov13850 = to_ov13850(sd);
+	struct i2c_client *client = ov13850->client;
+	int ret = 0;
+
+	mutex_lock(&ov13850->mutex);
+	on = !!on;
+	if (on == ov13850->streaming)
+		goto unlock_and_return;
+
+	if (on) {
+		ret = pm_runtime_get_sync(&client->dev);
+		if (ret < 0) {
+			pm_runtime_put_noidle(&client->dev);
+			goto unlock_and_return;
+		}
+
+		ret = __ov13850_start_stream(ov13850);
+		if (ret) {
+			v4l2_err(sd, "start stream failed while write regs\n");
+			pm_runtime_put(&client->dev);
+			goto unlock_and_return;
+		}
+	} else {
+		__ov13850_stop_stream(ov13850);
+		pm_runtime_put(&client->dev);
+	}
+
+	ov13850->streaming = on;
+
+unlock_and_return:
+	mutex_unlock(&ov13850->mutex);
+
+	return ret;
+}
+
+static int ov13850_s_power(struct v4l2_subdev *sd, int on)
+{
+	struct ov13850 *ov13850 = to_ov13850(sd);
+	struct i2c_client *client = ov13850->client;
+	int ret = 0;
+
+	mutex_lock(&ov13850->mutex);
+
+	/* If the power state is not modified - no work to do. */
+	if (ov13850->power_on == !!on)
+		goto unlock_and_return;
+
+	if (on) {
+		ret = pm_runtime_get_sync(&client->dev);
+		if (ret < 0) {
+			pm_runtime_put_noidle(&client->dev);
+			goto unlock_and_return;
+		}
+
+		ret = ov13850_write_array(ov13850->client, ov13850_global_regs);
+		if (ret) {
+			v4l2_err(sd, "could not set init registers\n");
+			pm_runtime_put_noidle(&client->dev);
+			goto unlock_and_return;
+		}
+
+		ov13850->power_on = true;
+	} else {
+		pm_runtime_put(&client->dev);
+		ov13850->power_on = false;
+	}
+
+unlock_and_return:
+	mutex_unlock(&ov13850->mutex);
+
+	return ret;
+}
+
+/* Calculate the delay in us by clock rate and clock cycles */
+static inline u32 ov13850_cal_delay(u32 cycles)
+{
+	return DIV_ROUND_UP(cycles, OV13850_XVCLK_FREQ / 1000 / 1000);
+}
+
+static int __ov13850_power_on(struct ov13850 *ov13850)
+{
+	int ret;
+	u32 delay_us;
+	struct device *dev = &ov13850->client->dev;
+
+	if (!IS_ERR_OR_NULL(ov13850->pins_default)) {
+		ret = pinctrl_select_state(ov13850->pinctrl,
+					   ov13850->pins_default);
+		if (ret < 0)
+			dev_err(dev, "could not set pins\n");
+	}
+
+	ret = clk_prepare_enable(ov13850->xvclk);
+	if (ret < 0) {
+		dev_err(dev, "Failed to enable xvclk\n");
+		return ret;
+	}
+
+	if (!IS_ERR(ov13850->reset_gpio))
+		gpiod_set_value_cansleep(ov13850->reset_gpio, 0);
+
+	ret = regulator_bulk_enable(OV13850_NUM_SUPPLIES, ov13850->supplies);
+	if (ret < 0) {
+		dev_err(dev, "Failed to enable regulators\n");
+		goto disable_clk;
+	}
+
+	if (!IS_ERR(ov13850->reset_gpio))
+		gpiod_set_value_cansleep(ov13850->reset_gpio, 1);
+
+	usleep_range(500, 1000);
+	if (!IS_ERR(ov13850->pwdn_gpio))
+		gpiod_set_value_cansleep(ov13850->pwdn_gpio, 1);
+
+	/* 8192 cycles prior to first SCCB transaction */
+	delay_us = ov13850_cal_delay(8192);
+	usleep_range(delay_us, delay_us * 2);
+
+	return 0;
+
+disable_clk:
+	clk_disable_unprepare(ov13850->xvclk);
+
+	return ret;
+}
+
+static void __ov13850_power_off(struct ov13850 *ov13850)
+{
+	int ret;
+	struct device *dev = &ov13850->client->dev;
+
+	if (!IS_ERR(ov13850->pwdn_gpio))
+		gpiod_set_value_cansleep(ov13850->pwdn_gpio, 0);
+	clk_disable_unprepare(ov13850->xvclk);
+	if (!IS_ERR(ov13850->reset_gpio))
+		gpiod_set_value_cansleep(ov13850->reset_gpio, 0);
+	if (!IS_ERR_OR_NULL(ov13850->pins_sleep)) {
+		ret = pinctrl_select_state(ov13850->pinctrl,
+					   ov13850->pins_sleep);
+		if (ret < 0)
+			dev_dbg(dev, "could not set pins\n");
+	}
+	regulator_bulk_disable(OV13850_NUM_SUPPLIES, ov13850->supplies);
+}
+
+static int ov13850_runtime_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct ov13850 *ov13850 = to_ov13850(sd);
+
+	return __ov13850_power_on(ov13850);
+}
+
+static int ov13850_runtime_suspend(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct ov13850 *ov13850 = to_ov13850(sd);
+
+	__ov13850_power_off(ov13850);
+
+	return 0;
+}
+
+#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
+static int ov13850_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+	struct ov13850 *ov13850 = to_ov13850(sd);
+	struct v4l2_mbus_framefmt *try_fmt =
+				v4l2_subdev_get_try_format(sd, fh->pad, 0);
+	const struct ov13850_mode *def_mode = &supported_modes[0];
+
+	mutex_lock(&ov13850->mutex);
+	/* Initialize try_fmt */
+	try_fmt->width = def_mode->width;
+	try_fmt->height = def_mode->height;
+	try_fmt->code = MEDIA_BUS_FMT_SBGGR10_1X10;
+	try_fmt->field = V4L2_FIELD_NONE;
+
+	mutex_unlock(&ov13850->mutex);
+	/* No crop or compose */
+
+	return 0;
+}
+#endif
+
+static const struct dev_pm_ops ov13850_pm_ops = {
+	SET_RUNTIME_PM_OPS(ov13850_runtime_suspend,
+			   ov13850_runtime_resume, NULL)
+};
+
+#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
+static const struct v4l2_subdev_internal_ops ov13850_internal_ops = {
+	.open = ov13850_open,
+};
+#endif
+
+static const struct v4l2_subdev_core_ops ov13850_core_ops = {
+	.s_power = ov13850_s_power,
+	.ioctl = ov13850_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl32 = ov13850_compat_ioctl32,
+#endif
+};
+
+static const struct v4l2_subdev_video_ops ov13850_video_ops = {
+	.s_stream = ov13850_s_stream,
+	.g_frame_interval = ov13850_g_frame_interval,
+};
+
+static const struct v4l2_subdev_pad_ops ov13850_pad_ops = {
+	.enum_mbus_code = ov13850_enum_mbus_code,
+	.enum_frame_size = ov13850_enum_frame_sizes,
+	.get_fmt = ov13850_get_fmt,
+	.set_fmt = ov13850_set_fmt,
+};
+
+static const struct v4l2_subdev_ops ov13850_subdev_ops = {
+	.core	= &ov13850_core_ops,
+	.video	= &ov13850_video_ops,
+	.pad	= &ov13850_pad_ops,
+};
+
+static int ov13850_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct ov13850 *ov13850 = container_of(ctrl->handler,
+					     struct ov13850, ctrl_handler);
+	struct i2c_client *client = ov13850->client;
+	s64 max;
+	int ret = 0;
+
+	/* Propagate change of current control to all related controls */
+	switch (ctrl->id) {
+	case V4L2_CID_VBLANK:
+		/* Update max exposure while meeting expected vblanking */
+		max = ov13850->cur_mode->height + ctrl->val - 4;
+		__v4l2_ctrl_modify_range(ov13850->exposure,
+					 ov13850->exposure->minimum, max,
+					 ov13850->exposure->step,
+					 ov13850->exposure->default_value);
+		break;
+	}
+
+	if (pm_runtime_get(&client->dev) <= 0)
+		return 0;
+
+	switch (ctrl->id) {
+	case V4L2_CID_EXPOSURE:
+		/* 4 least significant bits of expsoure are fractional part */
+		ret = ov13850_write_reg(ov13850->client,
+					OV13850_REG_EXPOSURE,
+					OV13850_REG_VALUE_24BIT,
+					ctrl->val << 4);
+		break;
+	case V4L2_CID_ANALOGUE_GAIN:
+		ret = ov13850_write_reg(ov13850->client,
+					OV13850_REG_GAIN_H,
+					OV13850_REG_VALUE_08BIT,
+					(ctrl->val >> OV13850_GAIN_H_SHIFT) &
+					OV13850_GAIN_H_MASK);
+		ret |= ov13850_write_reg(ov13850->client,
+					 OV13850_REG_GAIN_L,
+					 OV13850_REG_VALUE_08BIT,
+					 ctrl->val & OV13850_GAIN_L_MASK);
+		break;
+	case V4L2_CID_VBLANK:
+		ret = ov13850_write_reg(ov13850->client,
+					OV13850_REG_VTS,
+					OV13850_REG_VALUE_16BIT,
+					ctrl->val + ov13850->cur_mode->height);
+		break;
+	case V4L2_CID_TEST_PATTERN:
+		ret = ov13850_enable_test_pattern(ov13850, ctrl->val);
+		break;
+	default:
+		dev_warn(&client->dev, "%s Unhandled id:0x%x, val:0x%x\n",
+			 __func__, ctrl->id, ctrl->val);
+		break;
+	}
+
+	pm_runtime_put(&client->dev);
+
+	return ret;
+}
+
+static const struct v4l2_ctrl_ops ov13850_ctrl_ops = {
+	.s_ctrl = ov13850_set_ctrl,
+};
+
+static int ov13850_initialize_controls(struct ov13850 *ov13850)
+{
+	const struct ov13850_mode *mode;
+	struct v4l2_ctrl_handler *handler;
+	struct v4l2_ctrl *ctrl;
+	s64 exposure_max, vblank_def;
+	u32 h_blank;
+	int ret;
+
+	handler = &ov13850->ctrl_handler;
+	mode = ov13850->cur_mode;
+	ret = v4l2_ctrl_handler_init(handler, 8);
+	if (ret)
+		return ret;
+	handler->lock = &ov13850->mutex;
+
+	ctrl = v4l2_ctrl_new_int_menu(handler, NULL, V4L2_CID_LINK_FREQ,
+				      0, 0, link_freq_menu_items);
+	if (ctrl)
+		ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+	v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE,
+			  0, OV13850_PIXEL_RATE, 1, OV13850_PIXEL_RATE);
+
+	h_blank = mode->hts_def - mode->width;
+	ov13850->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK,
+				h_blank, h_blank, 1, h_blank);
+	if (ov13850->hblank)
+		ov13850->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+	vblank_def = mode->vts_def - mode->height;
+	ov13850->vblank = v4l2_ctrl_new_std(handler, &ov13850_ctrl_ops,
+				V4L2_CID_VBLANK, vblank_def,
+				OV13850_VTS_MAX - mode->height,
+				1, vblank_def);
+
+	exposure_max = mode->vts_def - 4;
+	ov13850->exposure = v4l2_ctrl_new_std(handler, &ov13850_ctrl_ops,
+				V4L2_CID_EXPOSURE, OV13850_EXPOSURE_MIN,
+				exposure_max, OV13850_EXPOSURE_STEP,
+				mode->exp_def);
+
+	ov13850->anal_gain = v4l2_ctrl_new_std(handler, &ov13850_ctrl_ops,
+				V4L2_CID_ANALOGUE_GAIN, OV13850_GAIN_MIN,
+				OV13850_GAIN_MAX, OV13850_GAIN_STEP,
+				OV13850_GAIN_DEFAULT);
+
+	ov13850->test_pattern = v4l2_ctrl_new_std_menu_items(handler,
+				&ov13850_ctrl_ops, V4L2_CID_TEST_PATTERN,
+				ARRAY_SIZE(ov13850_test_pattern_menu) - 1,
+				0, 0, ov13850_test_pattern_menu);
+
+	if (handler->error) {
+		ret = handler->error;
+		dev_err(&ov13850->client->dev,
+			"Failed to init controls(%d)\n", ret);
+		goto err_free_handler;
+	}
+
+	ov13850->subdev.ctrl_handler = handler;
+
+	return 0;
+
+err_free_handler:
+	v4l2_ctrl_handler_free(handler);
+
+	return ret;
+}
+
+static int ov13850_check_sensor_id(struct ov13850 *ov13850,
+				   struct i2c_client *client)
+{
+	struct device *dev = &ov13850->client->dev;
+	u32 id = 0;
+	int ret;
+
+	ret = ov13850_read_reg(client, OV13850_REG_CHIP_ID,
+			       OV13850_REG_VALUE_16BIT, &id);
+	if (id != CHIP_ID) {
+		dev_err(dev, "Unexpected sensor id(%06x), ret(%d)\n", id, ret);
+		return -ENODEV;
+	}
+
+	ret = ov13850_read_reg(client, OV13850_CHIP_REVISION_REG,
+			       OV13850_REG_VALUE_08BIT, &id);
+	if (ret) {
+		dev_err(dev, "Read chip revision register error\n");
+		return ret;
+	}
+
+	if (id == OV13850_R2A)
+		ov13850_global_regs = ov13850_global_regs_r2a;
+	else
+		ov13850_global_regs = ov13850_global_regs_r1a;
+	dev_info(dev, "Detected OV%06x sensor, REVISION 0x%x\n", CHIP_ID, id);
+
+	return 0;
+}
+
+static int ov13850_configure_regulators(struct ov13850 *ov13850)
+{
+	unsigned int i;
+
+	for (i = 0; i < OV13850_NUM_SUPPLIES; i++)
+		ov13850->supplies[i].supply = ov13850_supply_names[i];
+
+	return devm_regulator_bulk_get(&ov13850->client->dev,
+				       OV13850_NUM_SUPPLIES,
+				       ov13850->supplies);
+}
+
+static int ov13850_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	struct device *dev = &client->dev;
+	struct device_node *node = dev->of_node;
+	struct ov13850 *ov13850;
+	struct v4l2_subdev *sd;
+	char facing[2];
+	int ret;
+
+	dev_info(dev, "driver version: %02x.%02x.%02x",
+		DRIVER_VERSION >> 16,
+		(DRIVER_VERSION & 0xff00) >> 8,
+		DRIVER_VERSION & 0x00ff);
+
+	ov13850 = devm_kzalloc(dev, sizeof(*ov13850), GFP_KERNEL);
+	if (!ov13850)
+		return -ENOMEM;
+
+	ret = of_property_read_u32(node, RKMODULE_CAMERA_MODULE_INDEX,
+				   &ov13850->module_index);
+	ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_FACING,
+				       &ov13850->module_facing);
+	ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_NAME,
+				       &ov13850->module_name);
+	ret |= of_property_read_string(node, RKMODULE_CAMERA_LENS_NAME,
+				       &ov13850->len_name);
+	if (ret) {
+		dev_warn(dev, "could not get module information!\n");
+	}
+
+	ov13850->client = client;
+	ov13850->cur_mode = &supported_modes[0];
+
+	ov13850->xvclk = devm_clk_get(dev, "xvclk");
+	if (IS_ERR(ov13850->xvclk)) {
+		dev_err(dev, "Failed to get xvclk\n");
+		return -EINVAL;
+	}
+	ret = clk_set_rate(ov13850->xvclk, OV13850_XVCLK_FREQ);
+	if (ret < 0) {
+		dev_err(dev, "Failed to set xvclk rate (24MHz)\n");
+		return ret;
+	}
+	if (clk_get_rate(ov13850->xvclk) != OV13850_XVCLK_FREQ)
+		dev_warn(dev, "xvclk mismatched, modes are based on 24MHz\n");
+
+	ov13850->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(ov13850->reset_gpio))
+		dev_warn(dev, "Failed to get reset-gpios\n");
+
+	ov13850->pwdn_gpio = devm_gpiod_get(dev, "pwdn", GPIOD_OUT_LOW);
+	if (IS_ERR(ov13850->pwdn_gpio))
+		dev_warn(dev, "Failed to get pwdn-gpios\n");
+
+	ret = ov13850_configure_regulators(ov13850);
+	if (ret) {
+		dev_err(dev, "Failed to get power regulators\n");
+		return ret;
+	}
+
+	ov13850->pinctrl = devm_pinctrl_get(dev);
+	if (!IS_ERR(ov13850->pinctrl)) {
+		ov13850->pins_default =
+			pinctrl_lookup_state(ov13850->pinctrl,
+					     OF_CAMERA_PINCTRL_STATE_DEFAULT);
+		if (IS_ERR(ov13850->pins_default))
+			dev_err(dev, "could not get default pinstate\n");
+
+		ov13850->pins_sleep =
+			pinctrl_lookup_state(ov13850->pinctrl,
+					     OF_CAMERA_PINCTRL_STATE_SLEEP);
+		if (IS_ERR(ov13850->pins_sleep))
+			dev_err(dev, "could not get sleep pinstate\n");
+	}
+
+	mutex_init(&ov13850->mutex);
+
+	sd = &ov13850->subdev;
+	v4l2_i2c_subdev_init(sd, client, &ov13850_subdev_ops);
+	ret = ov13850_initialize_controls(ov13850);
+	if (ret)
+		goto err_destroy_mutex;
+
+	ret = __ov13850_power_on(ov13850);
+	if (ret)
+		goto err_free_handler;
+
+	ret = ov13850_check_sensor_id(ov13850, client);
+	if (ret)
+		goto err_power_off;
+
+#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
+	sd->internal_ops = &ov13850_internal_ops;
+	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+#endif
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	ov13850->pad.flags = MEDIA_PAD_FL_SOURCE;
+	sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
+	ret = media_entity_pads_init(&sd->entity, 1, &ov13850->pad);
+	if (ret < 0)
+		goto err_power_off;
+#endif
+
+	if (ov13850->module_facing && ov13850->module_name) {
+		memset(facing, 0, sizeof(facing));
+		if (strcmp(ov13850->module_facing, "back") == 0)
+			facing[0] = 'b';
+		else
+			facing[0] = 'f';
+
+		snprintf(sd->name, sizeof(sd->name), "m%02d_%s_%s %s",
+			 ov13850->module_index, facing,
+			 OV13850_NAME, dev_name(sd->dev));
+	}
+
+	ret = v4l2_async_register_subdev_sensor_common(sd);
+	if (ret) {
+		dev_err(dev, "v4l2 async register subdev failed\n");
+		goto err_clean_entity;
+	}
+
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+	pm_runtime_idle(dev);
+
+	return 0;
+
+err_clean_entity:
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	media_entity_cleanup(&sd->entity);
+#endif
+err_power_off:
+	__ov13850_power_off(ov13850);
+err_free_handler:
+	v4l2_ctrl_handler_free(&ov13850->ctrl_handler);
+err_destroy_mutex:
+	mutex_destroy(&ov13850->mutex);
+
+	return ret;
+}
+
+static int ov13850_remove(struct i2c_client *client)
+{
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct ov13850 *ov13850 = to_ov13850(sd);
+
+	v4l2_async_unregister_subdev(sd);
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	media_entity_cleanup(&sd->entity);
+#endif
+	v4l2_ctrl_handler_free(&ov13850->ctrl_handler);
+	mutex_destroy(&ov13850->mutex);
+
+	pm_runtime_disable(&client->dev);
+	if (!pm_runtime_status_suspended(&client->dev))
+		__ov13850_power_off(ov13850);
+	pm_runtime_set_suspended(&client->dev);
+
+	return 0;
+}
+
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id ov13850_of_match[] = {
+	{ .compatible = "ovti,ov13850" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, ov13850_of_match);
+#endif
+
+static const struct i2c_device_id ov13850_match_id[] = {
+	{ "ovti,ov13850", 0 },
+	{ },
+};
+
+static struct i2c_driver ov13850_i2c_driver = {
+	.driver = {
+		.name = OV13850_NAME,
+		.pm = &ov13850_pm_ops,
+		.of_match_table = of_match_ptr(ov13850_of_match),
+	},
+	.probe		= &ov13850_probe,
+	.remove		= &ov13850_remove,
+	.id_table	= ov13850_match_id,
+};
+
+static int __init sensor_mod_init(void)
+{
+	return i2c_add_driver(&ov13850_i2c_driver);
+}
+
+static void __exit sensor_mod_exit(void)
+{
+	i2c_del_driver(&ov13850_i2c_driver);
+}
+
+device_initcall_sync(sensor_mod_init);
+module_exit(sensor_mod_exit);
+
+MODULE_DESCRIPTION("OmniVision ov13850 sensor driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/uapi/linux/rk-camera-module.h b/include/uapi/linux/rk-camera-module.h
new file mode 100644
index 000000000000..9883565799e7
--- /dev/null
+++ b/include/uapi/linux/rk-camera-module.h
@@ -0,0 +1,146 @@ 
+/* SPDX-License-Identifier: ((GPL-2.0+ WITH Linux-syscall-note) OR MIT) */
+/*
+ * Rockchip module information
+ * Copyright (C) 2018-2019 Rockchip Electronics Co., Ltd.
+ */
+
+#ifndef _UAPI_RKMODULE_CAMERA_H
+#define _UAPI_RKMODULE_CAMERA_H
+
+#include <linux/types.h>
+
+#define RKMODULE_NAME_LEN		32
+#define RKMODULE_LSCDATA_LEN		441
+
+#define RKMODULE_CAMERA_MODULE_INDEX	"rockchip,camera-module-index"
+#define RKMODULE_CAMERA_MODULE_FACING	"rockchip,camera-module-facing"
+#define RKMODULE_CAMERA_MODULE_NAME	"rockchip,camera-module-name"
+#define RKMODULE_CAMERA_LENS_NAME	"rockchip,camera-module-lens-name"
+
+#define RKMODULE_GET_MODULE_INFO	\
+	_IOR('V', BASE_VIDIOC_PRIVATE + 0, struct rkmodule_inf)
+
+#define RKMODULE_AWB_CFG	\
+	_IOW('V', BASE_VIDIOC_PRIVATE + 1, struct rkmodule_awb_cfg)
+
+#define RKMODULE_AF_CFG	\
+	_IOW('V', BASE_VIDIOC_PRIVATE + 2, struct rkmodule_af_cfg)
+
+#define RKMODULE_LSC_CFG	\
+	_IOW('V', BASE_VIDIOC_PRIVATE + 3, struct rkmodule_lsc_cfg)
+
+/**
+ * struct rkmodule_base_inf - module base information
+ *
+ */
+struct rkmodule_base_inf {
+	char sensor[RKMODULE_NAME_LEN];
+	char module[RKMODULE_NAME_LEN];
+	char lens[RKMODULE_NAME_LEN];
+} __attribute__ ((packed));
+
+/**
+ * struct rkmodule_fac_inf - module factory information
+ *
+ */
+struct rkmodule_fac_inf {
+	__u32 flag;
+
+	char module[RKMODULE_NAME_LEN];
+	char lens[RKMODULE_NAME_LEN];
+	__u32 year;
+	__u32 month;
+	__u32 day;
+} __attribute__ ((packed));
+
+/**
+ * struct rkmodule_awb_inf - module awb information
+ *
+ */
+struct rkmodule_awb_inf {
+	__u32 flag;
+
+	__u32 r_value;
+	__u32 b_value;
+	__u32 gr_value;
+	__u32 gb_value;
+
+	__u32 golden_r_value;
+	__u32 golden_b_value;
+	__u32 golden_gr_value;
+	__u32 golden_gb_value;
+} __attribute__ ((packed));
+
+/**
+ * struct rkmodule_lsc_inf - module lsc information
+ *
+ */
+struct rkmodule_lsc_inf {
+	__u32 flag;
+
+	__u16 lsc_w;
+	__u16 lsc_h;
+	__u16 decimal_bits;
+
+	__u16 lsc_r[RKMODULE_LSCDATA_LEN];
+	__u16 lsc_b[RKMODULE_LSCDATA_LEN];
+	__u16 lsc_gr[RKMODULE_LSCDATA_LEN];
+	__u16 lsc_gb[RKMODULE_LSCDATA_LEN];
+} __attribute__ ((packed));
+
+/**
+ * struct rkmodule_af_inf - module af information
+ *
+ */
+struct rkmodule_af_inf {
+	__u32 flag;
+
+	__u32 vcm_start;
+	__u32 vcm_end;
+	__u32 vcm_dir;
+} __attribute__ ((packed));
+
+/**
+ * struct rkmodule_inf - module information
+ *
+ */
+struct rkmodule_inf {
+	struct rkmodule_base_inf base;
+	struct rkmodule_fac_inf fac;
+	struct rkmodule_awb_inf awb;
+	struct rkmodule_lsc_inf lsc;
+	struct rkmodule_af_inf af;
+} __attribute__ ((packed));
+
+/**
+ * struct rkmodule_awb_inf - module awb information
+ *
+ */
+struct rkmodule_awb_cfg {
+	__u32 enable;
+	__u32 golden_r_value;
+	__u32 golden_b_value;
+	__u32 golden_gr_value;
+	__u32 golden_gb_value;
+} __attribute__ ((packed));
+
+/**
+ * struct rkmodule_af_cfg
+ *
+ */
+struct rkmodule_af_cfg {
+	__u32 enable;
+	__u32 vcm_start;
+	__u32 vcm_end;
+	__u32 vcm_dir;
+} __attribute__ ((packed));
+
+/**
+ * struct rkmodule_lsc_cfg
+ *
+ */
+struct rkmodule_lsc_cfg {
+	__u32 enable;
+} __attribute__ ((packed));
+
+#endif /* _UAPI_RKMODULE_CAMERA_H */
-- 
2.20.1