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| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2023-05-18 05:41:18 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-05-29 08:19:47 +0300 |
| commit | ffc363d970d1d04be0f12b2252aa21aaef3ecfd0 (patch) | |
| tree | f930ea2e26d7b3ce7db72b148bccb3743e05324d /drivers/soundwire/cadence_master.h | |
| parent | 46b56a5cd2ff496c0707ae3deae849f12b86e534 (diff) | |
| download | linux-ffc363d970d1d04be0f12b2252aa21aaef3ecfd0.tar.xz | |
soundwire: intel/cadence: update hardware reset sequence
Combining hardware reset with the multi-link mode leads to a shortened
hardware reset pattern observed on the bus.
The updated hardware programming sequence is to first enable the clock
with the sync_arm/sync_go pattern, and only in a second step to issue
the hardware reset sequence. Since there is no longer a dependency
between sync_arm/sync_go and hw_reset, the behavior of
sdw_cdns_exit_reset() is changed to wait for the self-clearing
CONFIG_UPDATE to go back to zero,
Link: https://github.com/thesofproject/linux/issues/4170
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20230518024119.164160-3-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/soundwire/cadence_master.h')
| -rw-r--r-- | drivers/soundwire/cadence_master.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/soundwire/cadence_master.h b/drivers/soundwire/cadence_master.h index 86a450b1cbda..bc84435e420f 100644 --- a/drivers/soundwire/cadence_master.h +++ b/drivers/soundwire/cadence_master.h @@ -199,4 +199,7 @@ int cdns_set_sdw_stream(struct snd_soc_dai *dai, void sdw_cdns_check_self_clearing_bits(struct sdw_cdns *cdns, const char *string, bool initial_delay, int reset_iterations); +void sdw_cdns_config_update(struct sdw_cdns *cdns); +int sdw_cdns_config_update_set_wait(struct sdw_cdns *cdns); + #endif /* __SDW_CADENCE_H */ |