imx6 capture subsystem

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imx6 capture subsystem

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akbar123
Contributor III

Hi,

As I inspected, It seems we have two capture subsystems in NXP Linux kernel, one in drivers/media/platform/mxc/capture (fsl,imx6q-v4l2-capture) and another one in drivers/staging/media/imx (fsl,imx-capture-subsystem).

Question1: What is the difference between these two capture subsystems for imx6?

Question2: How to use the staging one? is that reliable?

 

Thanks in advance

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joanxie
NXP TechSupport
NXP TechSupport
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akbar123
Contributor III

Hi,

I use imx6q.

I mean These files: old and new

By old, I mean using "v4l2_int_device_register" in slave to introduce itself to bridge driver which is implemented in old file

By new, I mean using "v4l2_async_register_subdev" in slave to introduce itself to bridge driver via v4l2 async subsystem.

 

As I inspected, ov5640 driver introduces itself in two way:

*** The ov5640 driver in drivers/media/platform/mxc/capture uses "v4l2_int_device_register" way

*** The ov5640 driver in drivers/media/i2c uses the "v4l2_async_register_subdev" way

 

Question: Is my guess right that the new file intends to implement the bridge driver using Linux async subsystem? hence, can I use the ov5640 driver available in drivers/media/i2c?

 

Thanks for your help

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joanxie
NXP TechSupport
NXP TechSupport

the old and new files you mentioned are different driver files, if you use imx6q, you just use mxc_v4l2_capture.c as v4l2 capture driver for ov5640, ov5640.c under drivers/media/i2c is for ov5640 camera driver, ov5640.c under drivers/media/platform/mxc/capture is CSI  V4L2 driver, you can focus this one

for more detailed driver information, you also can refer to the linux reference manual

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