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soundwire: intel: support clock_stop mode without quirks

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In this mode, on restart the bus restarts immediately, the Slaves
remain synchronized and all context is kept intact.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20200817152923.3259-12-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2020-08-17 23:29:22 +08:00 committed by Vinod Koul
parent ab996b2971
commit 61fb830bf9
1 changed files with 20 additions and 1 deletions
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21
drivers/soundwire/intel.c
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@ -1595,7 +1595,8 @@ static int intel_suspend_runtime(struct device *dev)
intel_shim_wake(sdw, false);
} else if (clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET) {
} else if (clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET ||
!clock_stop_quirks) {
ret = sdw_cdns_clock_stop(cdns, true);
if (ret < 0) {
dev_err(dev, "cannot enable clock stop on suspend\n");
@ -1755,6 +1756,24 @@ static int intel_resume_runtime(struct device *dev)
dev_err(dev, "unable to restart clock during resume\n");
return ret;
}
} else if (!clock_stop_quirks) {
ret = intel_init(sdw);
if (ret) {
dev_err(dev, "%s failed: %d", __func__, ret);
return ret;
}
ret = sdw_cdns_enable_interrupt(cdns, true);
if (ret < 0) {
dev_err(dev, "cannot enable interrupts during resume\n");
return ret;
}
ret = sdw_cdns_clock_restart(cdns, false);
if (ret < 0) {
dev_err(dev, "unable to resume master during resume\n");
return ret;
}
} else {
dev_err(dev, "%s clock_stop_quirks %x unsupported\n",
__func__, clock_stop_quirks);