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soundwire: cadence: do not extend reset delay

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The duration of the hw_reset is defined as 4096 cycles. The Cadence IP
allows for an additional delay which doesn't seem necessary in
practice: the actual reset sequence duration is defined by the sync_go
mechanism, not by the IP itself.

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/20210818030130.17113-1-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2021-08-18 11:01:30 +08:00 committed by Vinod Koul
parent 029bfd1cd5
commit 2564a2d441
1 changed files with 1 additions and 4 deletions
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5
drivers/soundwire/cadence_master.c
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@ -1032,10 +1032,7 @@ EXPORT_SYMBOL(sdw_cdns_check_self_clearing_bits);
*/ */
int sdw_cdns_exit_reset(struct sdw_cdns *cdns) int sdw_cdns_exit_reset(struct sdw_cdns *cdns)
{ {
/* program maximum length reset to be safe */ /* keep reset delay unchanged to 4096 cycles */
cdns_updatel(cdns, CDNS_MCP_CONTROL,
CDNS_MCP_CONTROL_RST_DELAY,
CDNS_MCP_CONTROL_RST_DELAY);
/* use hardware generated reset */ /* use hardware generated reset */
cdns_updatel(cdns, CDNS_MCP_CONTROL, cdns_updatel(cdns, CDNS_MCP_CONTROL,