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path: root/drivers/soundwire/intel.c
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Diffstat (limited to 'drivers/soundwire/intel.c')
-rw-r--r--drivers/soundwire/intel.c112
1 files changed, 108 insertions, 4 deletions
diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 88aeef8b7c0c..85a0bb6af4fe 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -22,6 +22,22 @@
#include "bus.h"
#include "intel.h"
+#define INTEL_MASTER_SUSPEND_DELAY_MS 3000
+
+/*
+ * debug/config flags for the Intel SoundWire Master.
+ *
+ * Since we may have multiple masters active, we can have up to 8
+ * flags reused in each byte, with master0 using the ls-byte, etc.
+ */
+
+#define SDW_INTEL_MASTER_DISABLE_PM_RUNTIME BIT(0)
+#define SDW_INTEL_MASTER_DISABLE_CLOCK_STOP BIT(1)
+
+static int md_flags;
+module_param_named(sdw_md_flags, md_flags, int, 0444);
+MODULE_PARM_DESC(sdw_md_flags, "SoundWire Intel Master device flags (0x0 all off)");
+
/* Intel SHIM Registers Definition */
#define SDW_SHIM_LCAP 0x0
#define SDW_SHIM_LCTL 0x4
@@ -807,10 +823,17 @@ unlock:
static int intel_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
- /*
- * TODO: add pm_runtime support here, the startup callback
- * will make sure the IP is 'active'
- */
+ struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
+ int ret;
+
+ ret = pm_runtime_get_sync(cdns->dev);
+ if (ret < 0 && ret != -EACCES) {
+ dev_err_ratelimited(cdns->dev,
+ "pm_runtime_get_sync failed in %s, ret %d\n",
+ __func__, ret);
+ pm_runtime_put_noidle(cdns->dev);
+ return ret;
+ }
return 0;
}
@@ -985,7 +1008,10 @@ intel_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
static void intel_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
+ struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
+ pm_runtime_mark_last_busy(cdns->dev);
+ pm_runtime_put_autosuspend(cdns->dev);
}
static int intel_pcm_set_sdw_stream(struct snd_soc_dai *dai,
@@ -1270,6 +1296,7 @@ int intel_master_startup(struct platform_device *pdev)
struct sdw_cdns *cdns = dev_get_drvdata(dev);
struct sdw_intel *sdw = cdns_to_intel(cdns);
struct sdw_bus *bus = &cdns->bus;
+ int link_flags;
int ret;
if (bus->prop.hw_disabled) {
@@ -1314,6 +1341,18 @@ int intel_master_startup(struct platform_device *pdev)
intel_debugfs_init(sdw);
+ /* Enable runtime PM */
+ link_flags = md_flags >> (bus->link_id * 8);
+ if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME)) {
+ pm_runtime_set_autosuspend_delay(dev,
+ INTEL_MASTER_SUSPEND_DELAY_MS);
+ pm_runtime_use_autosuspend(dev);
+ pm_runtime_mark_last_busy(dev);
+
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ }
+
return 0;
err_interrupt:
@@ -1412,6 +1451,36 @@ static int intel_suspend(struct device *dev)
return 0;
}
+static int intel_suspend_runtime(struct device *dev)
+{
+ struct sdw_cdns *cdns = dev_get_drvdata(dev);
+ struct sdw_intel *sdw = cdns_to_intel(cdns);
+ struct sdw_bus *bus = &cdns->bus;
+ int ret;
+
+ if (bus->prop.hw_disabled) {
+ dev_dbg(dev, "SoundWire master %d is disabled, ignoring\n",
+ bus->link_id);
+ return 0;
+ }
+
+ ret = sdw_cdns_enable_interrupt(cdns, false);
+ if (ret < 0) {
+ dev_err(dev, "cannot disable interrupts on suspend\n");
+ return ret;
+ }
+
+ ret = intel_link_power_down(sdw);
+ if (ret) {
+ dev_err(dev, "Link power down failed: %d", ret);
+ return ret;
+ }
+
+ intel_shim_wake(sdw, false);
+
+ return 0;
+}
+
static int intel_resume(struct device *dev)
{
struct sdw_cdns *cdns = dev_get_drvdata(dev);
@@ -1446,10 +1515,45 @@ static int intel_resume(struct device *dev)
return ret;
}
+static int intel_resume_runtime(struct device *dev)
+{
+ struct sdw_cdns *cdns = dev_get_drvdata(dev);
+ struct sdw_intel *sdw = cdns_to_intel(cdns);
+ struct sdw_bus *bus = &cdns->bus;
+ int ret;
+
+ if (bus->prop.hw_disabled) {
+ dev_dbg(dev, "SoundWire master %d is disabled, ignoring\n",
+ bus->link_id);
+ return 0;
+ }
+
+ 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_exit_reset(cdns);
+ if (ret < 0) {
+ dev_err(dev, "unable to exit bus reset sequence during resume\n");
+ return ret;
+ }
+
+ return ret;
+}
+
#endif
static const struct dev_pm_ops intel_pm = {
SET_SYSTEM_SLEEP_PM_OPS(intel_suspend, intel_resume)
+ SET_RUNTIME_PM_OPS(intel_suspend_runtime, intel_resume_runtime, NULL)
};
static struct platform_driver sdw_intel_drv = {