kernel/git/stable/linux.git/drivers/soundwire/bus.c, branch linux-5.4.y

soundwire: bus: Fix device found flag correctly

2021-05-14T07:44:19+00:00

[ Upstream commit f03690f4f6992225d05dbd1171212e5be5a370dd ] found flag is used to indicate SoundWire devices that are both enumerated on the bus and available in the device list. However this flag is not reset correctly after one iteration, This could miss some of the devices that are enumerated on the bus but not in device list. So reset this correctly to fix this issue! Fixes: d52d7a1be02c ("soundwire: Add Slave status handling helpers") Signed-off-by: Srinivas Kandagatla Reviewed-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20210309104816.20350-1-srinivas.kandagatla@linaro.org Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

soundwire: bus: disable pm_runtime in sdw_slave_delete

2020-10-01T11:17:36+00:00

[ Upstream commit dff70572e9a3a1a01d9dbc2279faa784d95f41b6 ] Before removing the slave device, disable pm_runtime to prevent any race condition with the resume being executed after the bus and slave devices are removed. Since this pm_runtime_disable() is handled in common routines, implementations of Slave drivers do not need to call it in their .remove() routine. Signed-off-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20200115000844.14695-8-pierre-louis.bossart@linux.intel.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

soundwire: core: add device tree support for slave devices

2019-09-04T07:42:31+00:00

This patch adds support to parsing device tree based SoundWire slave devices. Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20190829163514.11221-3-srinivas.kandagatla@linaro.org Signed-off-by: Vinod Koul

soundwire: bus: set initial value to port_status

2019-09-04T06:33:53+00:00

port_status[port_num] are assigned for each port_num in some if conditions. So some of the port_status may not be initialized. Signed-off-by: Bard Liao Reviewed-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20190829181135.16049-1-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

soundwire: add debugfs support

2019-08-23T06:31:02+00:00

Add base debugfs mechanism for SoundWire bus by creating soundwire root and master-N and slave-x hierarchy. Also add SDW Slave SCP, DP0 and DP-N register debug file. Registers not implemented will print as "XX" Credits: this patch is based on an earlier internal contribution by Vinod Koul, Sanyog Kale, Shreyas Nc and Hardik Shah. Reviewed-by: Greg Kroah-Hartman Acked-by: Sanyog Kale Signed-off-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20190821185821.12690-2-pierre-louis.bossart@linux.intel.com Signed-off-by: Vinod Koul

soundwire: bus: improve dynamic debug comments for enumeration

2019-08-21T09:06:01+00:00

update comments to provide better understanding of enumeration flows. Signed-off-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20190806005522.22642-5-pierre-louis.bossart@linux.intel.com Signed-off-by: Vinod Koul

soundwire: bus: split handling of Device0 events

2019-08-02T16:59:38+00:00

Assigning a device number to a Slave will result in additional events when it reports its status in a PING frame. There is no point in dealing with all the other devices in a loop, this can be done when a non-device0 event happens. Signed-off-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20190725234032.21152-19-pierre-louis.bossart@linux.intel.com Signed-off-by: Vinod Koul

soundwire: rename/clarify MIPI DisCo properties

2019-05-27T05:23:00+00:00

The existing definitions are ambiguous and possibly misleading. For DP0, 'flow-control' is only relevant for the BRA protocol and should not be confused with async modes explicitly not supported for DP0, add prefix to follow MIPI DisCo definition The use of 'device_interrupts' is also questionable. The MIPI SoundWire spec defines Slave-, DP0- and DPN-level implementation-defined interrupts. Using the 'device' prefix in the last two cases is misleading, not only is the term 'device' overloaded but these properties are only valid at the DP0 and DPn levels. Rename to follow the MIPI definitions, no need to be creative here. Signed-off-by: Pierre-Louis Bossart Signed-off-by: Vinod Koul

soundwire: rename 'freq' fields

2019-05-27T05:23:00+00:00

Rename all fields with 'freq' as 'clk_freq' to follow the MIPI specification and avoid confusion between bus clock and audio clocks. No functionality change. Signed-off-by: Pierre-Louis Bossart Signed-off-by: Vinod Koul

soundwire: avoid multiple assignments

2019-05-02T15:17:51+00:00

Modify the code to avoid multiple assignments by assigning to variable after error checks in soundwire bus. CHECK: multiple assignments should be avoided Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman