Re: [PATCH 4/4] v4l2: add blackfin capture bridge driver

[Scott Jiang]

>
>> +
>> +#define CAPTURE_DRV_NAME        "bfin_capture"
>> +#define BCAP_MIN_NUM_BUF        2
>> +
>> +struct bcap_format {
>> +     u8 *desc;
>> +     u32 pixelformat;
>> +     enum v4l2_mbus_pixelcode mbus_code;
>> +     int bpp; /* bytes per pixel */
>
> Don't you think you might have to process 12 bpp formats at some point,
> like YUV 4:2:0, or NV12? Maybe better calculate in bits from the beginning?
>
I have a question here. How to calculate bytesperline for planar format?
According to v4l2 specification  width, height and bytesperline apply
to largest plane.
Does it mean bytesperline equal to Y plane distance between two line?
And so you can't use bytesperline x height to calculate sizeimage?
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