xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

soundwire: cadence: make SSP interval programmable

Browse Source 
In multi-master mode, the IP will only accept SSP intervals with
integer relationships between the frame rate and the gsync frequency.

E.g for a 48kHz frame rate and 4 kHz gsync signal, the SSP interval
can only be 1, 2, 3, 4, 6, 12.

To simplify we only allow one SSP per gsync interval.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200317163329.25501-11-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Pierre-Louis Bossart
2020-03-17 11:33:22 -05:00
committed by Vinod Koul
parent 0cdcdedc15
commit 1dd6a17f35
2 changed files with 7 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/soundwire/cadence_master.h
View File

@@ -5,6 +5,9 @@
#ifndef __SDW_CADENCE_H
#define __SDW_CADENCE_H
#define SDW_CADENCE_GSYNC_KHZ 4 /* 4 kHz */
#define SDW_CADENCE_GSYNC_HZ (SDW_CADENCE_GSYNC_KHZ * 1000)
/**
* struct sdw_cdns_pdi: PDI (Physical Data Interface) instance
*