On Thu, Jan 21, 2016 at 11:10:50PM +0000, Dan O'Donovan wrote:
(Sorry, re-sending as I wasn't subscribed to the alsa-devel mailing list on my previous attempt)
Hi Vinod
I am currently attempting to use the SSP0 port on an Intel X5-Z8300 SoC (Cherry Trail) with a new codec.
I have seen that you have committed SST firmware 'fw_sst_22a8.bin' and related SST audio soc drivers in the past, so I hope you don't mind if I ask you some questions about it here.
Primarily, I am wondering if there are any limitations imposed by that firmware binary that I need to be aware of. I haven't been able to find much information about what this firmware does or doesn't support.
That binary is not for CHT. Each Bin is specfic to a platform. I have the BYT and BSW versions, but not CHT
For example, existing CHT SST machine drivers suggest that the PCM bit clock is fixed at 19.2MHz.
Yes, the MCLK will be 19.2 here
Also, I am wondering if all SSP ports on the SoC are supported by that firmware, or if it is limited to just SSP2?
SSP2, for SSP0 we need to get a new version
Are there any other limitations that I may need to be aware of in the firmware (or in the SSP back-end driver) when attempting to connect a new codec (TI PCM5122 initially) to SSP0.
Bigger pole will be getting the firmware. Usually we support I2S and TDM modes
HTH