kernel/drivers/soundwire/bus.c, branch linux-5.1.y

soundwire: Add support for multi link bank switch

2018-08-27T04:19:48Z

In cases of multiple Masters in a stream, synchronization between multiple Master(s) is achieved by performing bank switch together and using Master methods. Add sdw_ml_bank_switch() to wait for completion of bank switch. Signed-off-by: Sanyog Kale Signed-off-by: Shreyas NC Acked-by: Pierre-Louis Bossart Signed-off-by: Vinod Koul

soundwire: Initialize completion for defer messages

2018-08-27T04:19:48Z

Deferred messages are async messages used to synchronize transitions mostly while doing a bank switch on multi links. On successful transitions these messages are marked complete and thereby confirming that all the buses performed bank switch successfully. So, initialize the completion structure for the same. Signed-off-by: Sanyog Kale Signed-off-by: Shreyas NC Acked-by: Pierre-Louis Bossart Signed-off-by: Vinod Koul

soundwire: Add stream configuration APIs

2018-05-11T16:17:06Z

Add APIs for prepare, enable, disable and de-prepare stream. Signed-off-by: Sanyog Kale Signed-off-by: Shreyas NC Signed-off-by: Vinod Koul

soundwire: Add bank switch routine

2018-05-11T16:17:05Z

SoundWire supports two registers banks. So, program the alternate bank with new configuration and then performs bank switch. Signed-off-by: Sanyog Kale Signed-off-by: Shreyas NC Signed-off-by: Vinod Koul

soundwire: Add helpers for ports operations

2018-05-11T16:17:05Z

Add helpers to configure, prepare, enable, disable and de-prepare ports. Signed-off-by: Sanyog Kale Signed-off-by: Shreyas NC Signed-off-by: Vinod Koul

soundwire: Add support for SoundWire stream management

2018-05-11T16:17:03Z

This patch adds APIs and relevant stream data structures for initialization and release of stream. Signed-off-by: Hardik T Shah Signed-off-by: Sanyog Kale Signed-off-by: Shreyas NC Signed-off-by: Vinod Koul

soundwire: Fix a signedness bug

2018-01-22T15:45:26Z

"ret" is an int and "buf" is a u8. sdw_read() returns negative error codes which are truncated to the u8, 0-255 range before being stored as an int. It means that "ret" can't be less than zero. Fixes: b0a9c37b0178 ("soundwire: Add slave status handling") Signed-off-by: Dan Carpenter Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman

soundwire: Fix incorrect return value check

2018-01-09T16:01:16Z

pm_runtime_get_sync will return negative values for error and 0 or 1 for success. Update the error check accordingly. Signed-off-by: Shreyas NC Reported-by: Dan Carpenter Fixes: 9d715fa005eb: ("soundwire: Add IO transfer") Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman

soundwire: Fix typo in return value check of sdw_read()

2018-01-08T16:53:21Z

Fix the typo, 'status' should be instead of 'status2'. Fixes: b0a9c37b0178 ("soundwire: Add slave status handling") Signed-off-by: Wei Yongjun Acked-by: Pierre-Louis Bossart Acked-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman

soundwire: fix sign extension when shifting buf[2] 24 places

2018-01-08T16:53:20Z

The buf[2] left shift by 24 bits is promoted to int (32 bit signed) and then signed-extended to unsigned long long. Hence if the upper bit to buf[2] is set then all the upper bits of addr end up as 1. Fix this by casting it to u64 before shifting it. Also replace the unsigned long long casts to u64 casts to match the same type of addr. Detected by CoverityScan, CID#1463147 ("Unintended sign extension") Fixes: d52d7a1be02c ("soundwire: Add Slave status handling helpers") Signed-off-by: Colin Ian King Acked-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman