diff options
| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2021-03-23 09:37:07 +0800 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2021-03-30 14:36:11 +0530 |
| commit | 58ef9356260c291a4321e07ff507f31a1d8212af (patch) | |
| tree | 90be9ee88617414a73bee8d844a80a60e17acba2 /drivers/soundwire | |
| parent | 8f29bb83586ea993e98b258e1fdb657367dd3c25 (diff) | |
soundwire: cadence: only prepare attached devices on clock stop
We sometimes see COMMAND_IGNORED responses during the clock stop
sequence. It turns out we already have information if devices are
present on a link, so we should only prepare those when they
are attached.
In addition, even when COMMAND_IGNORED are received, we should still
proceed with the clock stop. The device will not be prepared but
that's not a problem.
The only case where the clock stop will fail is if the Cadence IP
reports an error (including a timeout), or if the devices throw a
COMMAND_FAILED response.
BugLink: https://github.com/thesofproject/linux/issues/2621
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20210323013707.21455-1-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/soundwire')
| -rw-r--r-- | drivers/soundwire/cadence_master.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c index cc5b81121b2c..192dac10f0c2 100644 --- a/drivers/soundwire/cadence_master.c +++ b/drivers/soundwire/cadence_master.c @@ -1450,10 +1450,12 @@ int sdw_cdns_clock_stop(struct sdw_cdns *cdns, bool block_wake) } /* Prepare slaves for clock stop */ - ret = sdw_bus_prep_clk_stop(&cdns->bus); - if (ret < 0) { - dev_err(cdns->dev, "prepare clock stop failed %d", ret); - return ret; + if (slave_present) { + ret = sdw_bus_prep_clk_stop(&cdns->bus); + if (ret < 0 && ret != -ENODATA) { + dev_err(cdns->dev, "prepare clock stop failed %d\n", ret); + return ret; + } } /* |