diff options
| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2021-01-15 13:37:35 +0800 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2021-01-19 20:27:34 +0530 |
| commit | 6f206833cec60fbab6a86bd886ef40b917e7d50d (patch) | |
| tree | 86480ff114568bb283e52bc6fdf7ed5147fc1c02 /lib | |
| parent | c397efb77d814774285fe7db9613ca736b0c732e (diff) | |
soundwire: cadence: add status in dev_dbg 'State change' log
The existing debug log only mentions a state change, without providing
any details. For integration and stress-tests, it's helpful to see in
the dmesg log the reason for the state change.
The value is intended for power users and isn't converted as
human-readable values. But for the record each device has a 4-bit
status:
BIT(0): Unattached
BIT(1): Attached
BIT(2): Alert
BIT(3): Reserved (should not happen)
Example:
[ 121.891288] intel-sdw intel-sdw.0: Slave status change: 0x2
<< this shows a Device0 Attached
[ 121.891295] soundwire sdw-master-0: Slave attached, programming device number
[ 121.891629] soundwire sdw-master-0: SDW Slave Addr: 30025d071101
[ 121.891632] soundwire sdw-master-0: SDW Slave class_id 1, part_id 711, mfg_id 25d, unique_id 0, version 3
[ 121.892011] intel-sdw intel-sdw.0: Msg ignored for Slave 0
[ 121.892013] soundwire sdw-master-0: No more devices to enumerate
[ 121.892200] intel-sdw intel-sdw.0: Slave status change: 0x21
<< this shows the device now Attached as Device1 and Unattached as
Device0, i.e. a successful enumeration.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20210115053738.22630-3-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions