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

soundwire: intel: handle disabled links

Browse Source 
On most hardware platforms, SoundWire interfaces are pin-muxed with
other interfaces (typically DMIC or I2S) and the status of each link
needs to be checked at boot time.

For Intel platforms, the BIOS provides a menu to enable/disable the
links separately, and the information is provided to the OS with an
Intel-specific _DSD property. The same capability will be added to
revisions of the MIPI DisCo specification.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190821185821.12690-5-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Pierre-Louis Bossart
2019-08-21 13:58:21 -05:00
committed by Vinod Koul
parent 79ee663126
commit 395713d8ca
2 changed files with 24 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/soundwire/sdw.h
View File

@@ -380,6 +380,7 @@ struct sdw_slave_prop {
* @err_threshold: Number of times that software may retry sending a single
* command
* @mclk_freq: clock reference passed to SoundWire Master, in Hz.
* @hw_disabled: if true, the Master is not functional, typically due to pin-mux
*/
struct sdw_master_prop {
u32 revision;
@@ -395,6 +396,7 @@ struct sdw_master_prop {
bool dynamic_frame;
u32 err_threshold;
u32 mclk_freq;
bool hw_disabled;
};
int sdw_master_read_prop(struct sdw_bus *bus);