On Mon, 19 Sep 2022 13:53:49 +0200, Pierre-Louis Bossart wrote:
SOF topologies hard-code the MCLK used for SSP connections. That was a bad idea in hindsight, this information should really come from BIOS and/or machine driver.
This patch introduces a helper to scan all SSP endpoints connected to a codec, and all formats to see what MCLK is used. When BIT(0) of the mdivc offset if set in the SSP blob, MCLK0 is used, and likewise when BIT(1) is set MCLK1 is used.
The case where both MCLKs are used is possible but has never been seen in practice so should be treated as an error by the caller.
Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Reviewed-by: Kai Vehmanen kai.vehmanen@linux.intel.com Reviewed-by: Bard Liao yung-chuan.liao@linux.intel.com
Reviewed-by: Takashi Iwai tiwai@suse.de
thanks,
Takashi