Enable multi-link (aka multi-master configuration). In this configuration, updates and commands with the 'ssp_sync' tag will be deferred and controlled by the gsync hardware signal. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx> --- drivers/soundwire/cadence_master.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c index 55cf219cc908..eedc4cefdab0 100644 --- a/drivers/soundwire/cadence_master.c +++ b/drivers/soundwire/cadence_master.c @@ -843,7 +843,13 @@ int sdw_cdns_exit_reset(struct sdw_cdns *cdns) CDNS_MCP_CONTROL_HW_RST); /* commit changes */ - return cdns_config_update(cdns); + cdns_updatel(cdns, CDNS_MCP_CONFIG_UPDATE, + CDNS_MCP_CONFIG_UPDATE_BIT, + CDNS_MCP_CONFIG_UPDATE_BIT); + + /* don't wait here */ + return 0; + } EXPORT_SYMBOL(sdw_cdns_exit_reset); @@ -1104,7 +1110,9 @@ int sdw_cdns_init(struct sdw_cdns *cdns) /* Disable auto bus release */ val &= ~CDNS_MCP_CONFIG_BUS_REL; - /* Multi-master support to be added here */ + if (cdns->bus.multi_link) + /* Set Multi-master mode to take gsync into account */ + val |= CDNS_MCP_CONFIG_MMASTER; /* leave frame delay to hardware default of 0x1F */ -- 2.20.1
