From 99b6a30f9f9995be3698f59df9882490d604f5d1 Mon Sep 17 00:00:00 2001 From: Pierre-Louis Bossart Date: Mon, 17 Aug 2020 23:29:15 +0800 Subject: [PATCH] soundwire: intel: call helper to reset Slave states on resume This helps make sure they are all UNATTACHED and reset the state machines. At the moment we perform a bus reset both for system resume and pm_runtime resume, this will be modified when clock-stop mode is supported Signed-off-by: Pierre-Louis Bossart Signed-off-by: Bard Liao Link: https://lore.kernel.org/r/20200817152923.3259-5-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul --- drivers/soundwire/intel.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c index 00c5de1250ec1..10dd0e208ce7a 100644 --- a/drivers/soundwire/intel.c +++ b/drivers/soundwire/intel.c @@ -1516,6 +1516,12 @@ static int intel_resume(struct device *dev) return ret; } + /* + * make sure all Slaves are tagged as UNATTACHED and provide + * reason for reinitialization + */ + sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET); + ret = sdw_cdns_enable_interrupt(cdns, true); if (ret < 0) { dev_err(dev, "cannot enable interrupts during resume\n"); @@ -1562,6 +1568,12 @@ static int intel_resume_runtime(struct device *dev) return ret; } + /* + * make sure all Slaves are tagged as UNATTACHED and provide + * reason for reinitialization + */ + sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET); + ret = sdw_cdns_enable_interrupt(cdns, true); if (ret < 0) { dev_err(dev, "cannot enable interrupts during resume\n"); -- 2.47.2