On 1/1/2017 2:57 AM, Mark Brown wrote:
On Tue, Dec 20, 2016 at 04:47:07PM +0800, John Hsu wrote:
Provide the LRC and BCLK divide. The clock divide needs configuration
properly when codec in master mode.
Why is the driver not able to configure these automatically, most
devices manage to do that OK? Typically systems are fine with the
obvious divisions down from the root clock, the driver should at least
offer that as a default rather than requiring all machine drivers to
duplicate the divisor selection code.
The system clock of codec is always 256FS. Therefore, the driver can
make it automatically. If the codec is as master, the driver needs to
divide the system clock to output the BCLK and FS. But there are too
many combinations between BCLK and FS. The BCLK maybe is 32FS, 64FS,
128FS, etc. The driver needs machine information to do the division.
Thus, I think the best way is to make decision by machine driver.
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