Re: [alsa-devel] [RFC PATCH 16/40] soundwire: cadence_master: improve startup sequence with link hw_reset

+static int do_reset(struct sdw_cdns *cdns) +{ + int ret; + + /* program maximum length reset to be safe */ + cdns_updatel(cdns, CDNS_MCP_CONTROL, +CDNS_MCP_CONTROL_RST_DELAY, +CDNS_MCP_CONTROL_RST_DELAY); + + /* use hardware

Re: [alsa-devel] [RFC PATCH 16/40] soundwire: cadence_master: improve startup sequence with link hw_reset

On Thu, Jul 25, 2019 at 06:40:08PM -0500, Pierre-Louis Bossart wrote: > Enable interrupts first, then engage hardware bus reset with maximum > duration to make sure the Slave(s) correctly detect the reset pattern > and to ensure electrical conflicts can be resolved. > > Without these changes the