[alsa-devel] [PATCH 1/2] ASoC: Intel: Skylake: Move i915 registration to worker thread
Subhransu S. Prusty
subhransu.s.prusty at intel.com
Wed May 3 12:07:34 CEST 2017
From: Vinod Koul <vinod.koul at intel.com>
The i915 component framework expects the caller to be invoking
snd_hdac_i915_init() from a thread context. Otherwise it results in
lockups on drm side.
So move the registering of component interface and probing of codecs on
this bus to a worker thread.
init_failed in skl structure is not used currently, so renamed to
init_done and used to track the initialization done in worker thread.
Reported-by: Imre Deak <imre.deak at intel.com>
Signed-off-by: Vinod Koul <vinod.koul at intel.com>
Signed-off-by: Sodhi, VunnyX <vunnyx.sodhi at intel.com>
Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty at intel.com>
---
sound/soc/intel/skylake/skl.c | 162 +++++++++++++++++++++++-------------------
sound/soc/intel/skylake/skl.h | 4 +-
2 files changed, 91 insertions(+), 75 deletions(-)
diff --git a/sound/soc/intel/skylake/skl.c b/sound/soc/intel/skylake/skl.c
index 6df3b317a476..4c9b5781282b 100644
--- a/sound/soc/intel/skylake/skl.c
+++ b/sound/soc/intel/skylake/skl.c
@@ -410,7 +410,7 @@ static int skl_free(struct hdac_ext_bus *ebus)
struct skl *skl = ebus_to_skl(ebus);
struct hdac_bus *bus = ebus_to_hbus(ebus);
- skl->init_failed = 1; /* to be sure */
+ skl->init_done = 0; /* to be sure */
snd_hdac_ext_stop_streams(ebus);
@@ -428,8 +428,10 @@ static int skl_free(struct hdac_ext_bus *ebus)
snd_hdac_ext_bus_exit(ebus);
+ cancel_work_sync(&skl->probe_work);
if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI))
snd_hdac_i915_exit(&ebus->bus);
+
return 0;
}
@@ -566,6 +568,84 @@ static int skl_codec_create(struct hdac_ext_bus *ebus)
.get_response = snd_hdac_bus_get_response,
};
+static int skl_i915_init(struct hdac_bus *bus)
+{
+ int err;
+
+ /*
+ * The HDMI codec is in GPU so we need to ensure that it is powered
+ * up and ready for probe
+ */
+ err = snd_hdac_i915_init(bus);
+ if (err < 0)
+ return err;
+
+ err = snd_hdac_display_power(bus, true);
+ if (err < 0)
+ dev_err(bus->dev, "Cannot turn on display power on i915\n");
+
+ return err;
+}
+
+static void skl_probe_work(struct work_struct *work)
+{
+ struct skl *skl = container_of(work, struct skl, probe_work);
+ struct hdac_ext_bus *ebus = &skl->ebus;
+ struct hdac_bus *bus = ebus_to_hbus(ebus);
+ struct hdac_ext_link *hlink = NULL;
+ int err;
+
+ if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)) {
+ err = skl_i915_init(bus);
+ if (err < 0)
+ return;
+ }
+
+ err = skl_init_chip(bus, true);
+ if (err < 0) {
+ dev_err(bus->dev, "Init chip failed with err: %d\n", err);
+ goto out_err;
+ }
+
+ /* codec detection */
+ if (!bus->codec_mask)
+ dev_info(bus->dev, "no hda codecs found!\n");
+
+ /* create codec instances */
+ err = skl_codec_create(ebus);
+ if (err < 0)
+ goto out_err;
+
+ if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)) {
+ err = snd_hdac_display_power(bus, false);
+ if (err < 0) {
+ dev_err(bus->dev, "Cannot turn off display power on i915\n");
+ return;
+ }
+ }
+
+ /* register platform dai and controls */
+ err = skl_platform_register(bus->dev);
+ if (err < 0)
+ return;
+ /*
+ * we are done probing so decrement link counts
+ */
+ list_for_each_entry(hlink, &ebus->hlink_list, list)
+ snd_hdac_ext_bus_link_put(ebus, hlink);
+
+ /* configure PM */
+ pm_runtime_put_noidle(bus->dev);
+ pm_runtime_allow(bus->dev);
+ skl->init_done = 1;
+
+ return;
+
+out_err:
+ if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI))
+ err = snd_hdac_display_power(bus, false);
+}
+
/*
* constructor
*/
@@ -593,6 +673,7 @@ static int skl_create(struct pci_dev *pci,
snd_hdac_ext_bus_init(ebus, &pci->dev, &bus_core_ops, io_ops);
ebus->bus.use_posbuf = 1;
skl->pci = pci;
+ INIT_WORK(&skl->probe_work, skl_probe_work);
ebus->bus.bdl_pos_adj = 0;
@@ -601,27 +682,6 @@ static int skl_create(struct pci_dev *pci,
return 0;
}
-static int skl_i915_init(struct hdac_bus *bus)
-{
- int err;
-
- /*
- * The HDMI codec is in GPU so we need to ensure that it is powered
- * up and ready for probe
- */
- err = snd_hdac_i915_init(bus);
- if (err < 0)
- return err;
-
- err = snd_hdac_display_power(bus, true);
- if (err < 0) {
- dev_err(bus->dev, "Cannot turn on display power on i915\n");
- return err;
- }
-
- return err;
-}
-
static int skl_first_init(struct hdac_ext_bus *ebus)
{
struct skl *skl = ebus_to_skl(ebus);
@@ -684,20 +744,7 @@ static int skl_first_init(struct hdac_ext_bus *ebus)
/* initialize chip */
skl_init_pci(skl);
- if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)) {
- err = skl_i915_init(bus);
- if (err < 0)
- return err;
- }
-
- skl_init_chip(bus, true);
-
- /* codec detection */
- if (!bus->codec_mask) {
- dev_info(bus->dev, "no hda codecs found!\n");
- }
-
- return 0;
+ return skl_init_chip(bus, true);
}
static int skl_probe(struct pci_dev *pci,
@@ -706,7 +753,6 @@ static int skl_probe(struct pci_dev *pci,
struct skl *skl;
struct hdac_ext_bus *ebus = NULL;
struct hdac_bus *bus = NULL;
- struct hdac_ext_link *hlink = NULL;
int err;
/* we use ext core ops, so provide NULL for ops here */
@@ -729,7 +775,7 @@ static int skl_probe(struct pci_dev *pci,
if (skl->nhlt == NULL) {
err = -ENODEV;
- goto out_display_power_off;
+ goto out_free;
}
err = skl_nhlt_create_sysfs(skl);
@@ -760,56 +806,24 @@ static int skl_probe(struct pci_dev *pci,
if (bus->mlcap)
snd_hdac_ext_bus_get_ml_capabilities(ebus);
+ snd_hdac_bus_stop_chip(bus);
+
/* create device for soc dmic */
err = skl_dmic_device_register(skl);
if (err < 0)
goto out_dsp_free;
- /* register platform dai and controls */
- err = skl_platform_register(bus->dev);
- if (err < 0)
- goto out_dmic_free;
-
- /* create codec instances */
- err = skl_codec_create(ebus);
- if (err < 0)
- goto out_unregister;
-
- if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)) {
- err = snd_hdac_display_power(bus, false);
- if (err < 0) {
- dev_err(bus->dev, "Cannot turn off display power on i915\n");
- return err;
- }
- }
-
- /*
- * we are done probling so decrement link counts
- */
- list_for_each_entry(hlink, &ebus->hlink_list, list)
- snd_hdac_ext_bus_link_put(ebus, hlink);
-
- /* configure PM */
- pm_runtime_put_noidle(bus->dev);
- pm_runtime_allow(bus->dev);
+ schedule_work(&skl->probe_work);
return 0;
-out_unregister:
- skl_platform_unregister(bus->dev);
-out_dmic_free:
- skl_dmic_device_unregister(skl);
out_dsp_free:
skl_free_dsp(skl);
out_mach_free:
skl_machine_device_unregister(skl);
out_nhlt_free:
skl_nhlt_free(skl->nhlt);
-out_display_power_off:
- if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI))
- snd_hdac_display_power(bus, false);
out_free:
- skl->init_failed = 1;
skl_free(ebus);
return err;
@@ -828,7 +842,7 @@ static void skl_shutdown(struct pci_dev *pci)
skl = ebus_to_skl(ebus);
- if (skl->init_failed)
+ if (!skl->init_done)
return;
snd_hdac_ext_stop_streams(ebus);
diff --git a/sound/soc/intel/skylake/skl.h b/sound/soc/intel/skylake/skl.h
index 5b3fa4b91691..c1968a06174a 100644
--- a/sound/soc/intel/skylake/skl.h
+++ b/sound/soc/intel/skylake/skl.h
@@ -67,7 +67,7 @@ struct skl {
struct hdac_ext_bus ebus;
struct pci_dev *pci;
- unsigned int init_failed:1; /* delayed init failed */
+ unsigned int init_done:1; /* delayed init status */
struct platform_device *dmic_dev;
struct platform_device *i2s_dev;
struct snd_soc_platform *platform;
@@ -85,6 +85,8 @@ struct skl {
const struct firmware *tplg;
int supend_active;
+
+ struct work_struct probe_work;
};
#define skl_to_ebus(s) (&(s)->ebus)
--
1.9.1
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