* [PATCH AUTOSEL 5.4 02/42] ASoC: cs42l51: manage mclk shutdown delay
2020-11-10 3:53 [PATCH AUTOSEL 5.4 01/42] ASoC: qcom: sdm845: set driver name correctly Sasha Levin
@ 2020-11-10 3:54 ` Sasha Levin
2020-11-10 3:54 ` [PATCH AUTOSEL 5.4 08/42] ALSA: hda: Separate runtime and system suspend Sasha Levin
2020-11-10 3:54 ` [PATCH AUTOSEL 5.4 09/42] ALSA: hda: Reinstate runtime_allow() for all hda controllers Sasha Levin
2 siblings, 0 replies; 4+ messages in thread
From: Sasha Levin @ 2020-11-10 3:54 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Sasha Levin, patches, alsa-devel, Mark Brown, Olivier Moysan
From: Olivier Moysan <olivier.moysan@st.com>
[ Upstream commit 20afe581c9b980848ad097c4d54dde9bec7593ef ]
A delay must be introduced before the shutdown down of the mclk,
as stated in CS42L51 datasheet. Otherwise the codec may
produce some noise after the end of DAPM power down sequence.
The delay between DAC and CLOCK_SUPPLY widgets is too short.
Add a delay in mclk shutdown request to manage the shutdown delay
explicitly. From experiments, at least 10ms delay is necessary.
Set delay to 20ms as recommended in Documentation/timers/timers-howto.rst
when using msleep().
Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Link: https://lore.kernel.org/r/20201020150109.482-1-olivier.moysan@st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/soc/codecs/cs42l51.c | 22 +++++++++++++++++++++-
1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/sound/soc/codecs/cs42l51.c b/sound/soc/codecs/cs42l51.c
index 55408c8fcb4e3..cdd7ae90c2b59 100644
--- a/sound/soc/codecs/cs42l51.c
+++ b/sound/soc/codecs/cs42l51.c
@@ -247,8 +247,28 @@ static const struct snd_soc_dapm_widget cs42l51_dapm_widgets[] = {
&cs42l51_adcr_mux_controls),
};
+static int mclk_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event)
+{
+ struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm);
+ struct cs42l51_private *cs42l51 = snd_soc_component_get_drvdata(comp);
+
+ switch (event) {
+ case SND_SOC_DAPM_PRE_PMU:
+ return clk_prepare_enable(cs42l51->mclk_handle);
+ case SND_SOC_DAPM_POST_PMD:
+ /* Delay mclk shutdown to fulfill power-down sequence requirements */
+ msleep(20);
+ clk_disable_unprepare(cs42l51->mclk_handle);
+ break;
+ }
+
+ return 0;
+}
+
static const struct snd_soc_dapm_widget cs42l51_dapm_mclk_widgets[] = {
- SND_SOC_DAPM_CLOCK_SUPPLY("MCLK")
+ SND_SOC_DAPM_SUPPLY("MCLK", SND_SOC_NOPM, 0, 0, mclk_event,
+ SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
};
static const struct snd_soc_dapm_route cs42l51_routes[] = {
--
2.27.0
^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH AUTOSEL 5.4 08/42] ALSA: hda: Separate runtime and system suspend
2020-11-10 3:53 [PATCH AUTOSEL 5.4 01/42] ASoC: qcom: sdm845: set driver name correctly Sasha Levin
2020-11-10 3:54 ` [PATCH AUTOSEL 5.4 02/42] ASoC: cs42l51: manage mclk shutdown delay Sasha Levin
@ 2020-11-10 3:54 ` Sasha Levin
2020-11-10 3:54 ` [PATCH AUTOSEL 5.4 09/42] ALSA: hda: Reinstate runtime_allow() for all hda controllers Sasha Levin
2 siblings, 0 replies; 4+ messages in thread
From: Sasha Levin @ 2020-11-10 3:54 UTC (permalink / raw)
To: linux-kernel, stable; +Cc: Takashi Iwai, Sasha Levin, alsa-devel, Kai-Heng Feng
From: Kai-Heng Feng <kai.heng.feng@canonical.com>
[ Upstream commit f5dac54d9d93826a776dffc848df76746f7135bb ]
Both pm_runtime_force_suspend() and pm_runtime_force_resume() have
some implicit checks, so it can make code flow more straightforward if
we separate runtime and system suspend callbacks.
High Definition Audio Specification, 4.5.9.3 Codec Wake From System S3
states that codec can wake the system up from S3 if WAKEEN is toggled.
Since HDA controller has different wakeup settings for runtime and
system susend, we also need to explicitly disable direct-complete which
can be enabled automatically by PCI core. In addition to that, avoid
waking up codec if runtime resume is for system suspend, to not break
direct-complete for codecs.
While at it, also remove AZX_DCAPS_SUSPEND_SPURIOUS_WAKEUP, as the
original bug commit a6630529aecb ("ALSA: hda: Workaround for spurious
wakeups on some Intel platforms") solves doesn't happen with this
patch.
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Link: https://lore.kernel.org/r/20201027130038.16463-3-kai.heng.feng@canonical.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/pci/hda/hda_controller.h | 3 +-
sound/pci/hda/hda_intel.c | 62 +++++++++++++++++++---------------
2 files changed, 36 insertions(+), 29 deletions(-)
diff --git a/sound/pci/hda/hda_controller.h b/sound/pci/hda/hda_controller.h
index a356fb0e57738..9da7a06d024f1 100644
--- a/sound/pci/hda/hda_controller.h
+++ b/sound/pci/hda/hda_controller.h
@@ -41,7 +41,7 @@
/* 24 unused */
#define AZX_DCAPS_COUNT_LPIB_DELAY (1 << 25) /* Take LPIB as delay */
#define AZX_DCAPS_PM_RUNTIME (1 << 26) /* runtime PM support */
-#define AZX_DCAPS_SUSPEND_SPURIOUS_WAKEUP (1 << 27) /* Workaround for spurious wakeups after suspend */
+/* 27 unused */
#define AZX_DCAPS_CORBRP_SELF_CLEAR (1 << 28) /* CORBRP clears itself after reset */
#define AZX_DCAPS_NO_MSI64 (1 << 29) /* Stick to 32-bit MSIs */
#define AZX_DCAPS_SEPARATE_STREAM_TAG (1 << 30) /* capture and playback use separate stream tag */
@@ -143,6 +143,7 @@ struct azx {
unsigned int align_buffer_size:1;
unsigned int region_requested:1;
unsigned int disabled:1; /* disabled by vga_switcheroo */
+ unsigned int pm_prepared:1;
/* GTS present */
unsigned int gts_present:1;
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 9a1968932b783..ab32d4811c9ef 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -295,8 +295,7 @@ enum {
/* PCH for HSW/BDW; with runtime PM */
/* no i915 binding for this as HSW/BDW has another controller for HDMI */
#define AZX_DCAPS_INTEL_PCH \
- (AZX_DCAPS_INTEL_PCH_BASE | AZX_DCAPS_PM_RUNTIME |\
- AZX_DCAPS_SUSPEND_SPURIOUS_WAKEUP)
+ (AZX_DCAPS_INTEL_PCH_BASE | AZX_DCAPS_PM_RUNTIME)
/* HSW HDMI */
#define AZX_DCAPS_INTEL_HASWELL \
@@ -984,7 +983,7 @@ static void __azx_runtime_suspend(struct azx *chip)
display_power(chip, false);
}
-static void __azx_runtime_resume(struct azx *chip, bool from_rt)
+static void __azx_runtime_resume(struct azx *chip)
{
struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
struct hdac_bus *bus = azx_bus(chip);
@@ -1001,7 +1000,8 @@ static void __azx_runtime_resume(struct azx *chip, bool from_rt)
azx_init_pci(chip);
hda_intel_init_chip(chip, true);
- if (from_rt) {
+ /* Avoid codec resume if runtime resume is for system suspend */
+ if (!chip->pm_prepared) {
list_for_each_codec(codec, &chip->bus) {
if (codec->relaxed_resume)
continue;
@@ -1017,6 +1017,29 @@ static void __azx_runtime_resume(struct azx *chip, bool from_rt)
}
#ifdef CONFIG_PM_SLEEP
+static int azx_prepare(struct device *dev)
+{
+ struct snd_card *card = dev_get_drvdata(dev);
+ struct azx *chip;
+
+ chip = card->private_data;
+ chip->pm_prepared = 1;
+
+ /* HDA controller always requires different WAKEEN for runtime suspend
+ * and system suspend, so don't use direct-complete here.
+ */
+ return 0;
+}
+
+static void azx_complete(struct device *dev)
+{
+ struct snd_card *card = dev_get_drvdata(dev);
+ struct azx *chip;
+
+ chip = card->private_data;
+ chip->pm_prepared = 0;
+}
+
static int azx_suspend(struct device *dev)
{
struct snd_card *card = dev_get_drvdata(dev);
@@ -1028,15 +1051,7 @@ static int azx_suspend(struct device *dev)
chip = card->private_data;
bus = azx_bus(chip);
- snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
- /* An ugly workaround: direct call of __azx_runtime_suspend() and
- * __azx_runtime_resume() for old Intel platforms that suffer from
- * spurious wakeups after S3 suspend
- */
- if (chip->driver_caps & AZX_DCAPS_SUSPEND_SPURIOUS_WAKEUP)
- __azx_runtime_suspend(chip);
- else
- pm_runtime_force_suspend(dev);
+ __azx_runtime_suspend(chip);
if (bus->irq >= 0) {
free_irq(bus->irq, chip);
bus->irq = -1;
@@ -1064,11 +1079,7 @@ static int azx_resume(struct device *dev)
if (azx_acquire_irq(chip, 1) < 0)
return -EIO;
- if (chip->driver_caps & AZX_DCAPS_SUSPEND_SPURIOUS_WAKEUP)
- __azx_runtime_resume(chip, false);
- else
- pm_runtime_force_resume(dev);
- snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+ __azx_runtime_resume(chip);
trace_azx_resume(chip);
return 0;
@@ -1116,10 +1127,7 @@ static int azx_runtime_suspend(struct device *dev)
chip = card->private_data;
/* enable controller wake up event */
- if (snd_power_get_state(card) == SNDRV_CTL_POWER_D0) {
- azx_writew(chip, WAKEEN, azx_readw(chip, WAKEEN) |
- STATESTS_INT_MASK);
- }
+ azx_writew(chip, WAKEEN, azx_readw(chip, WAKEEN) | STATESTS_INT_MASK);
__azx_runtime_suspend(chip);
trace_azx_runtime_suspend(chip);
@@ -1130,18 +1138,14 @@ static int azx_runtime_resume(struct device *dev)
{
struct snd_card *card = dev_get_drvdata(dev);
struct azx *chip;
- bool from_rt = snd_power_get_state(card) == SNDRV_CTL_POWER_D0;
if (!azx_is_pm_ready(card))
return 0;
chip = card->private_data;
- __azx_runtime_resume(chip, from_rt);
+ __azx_runtime_resume(chip);
/* disable controller Wake Up event*/
- if (from_rt) {
- azx_writew(chip, WAKEEN, azx_readw(chip, WAKEEN) &
- ~STATESTS_INT_MASK);
- }
+ azx_writew(chip, WAKEEN, azx_readw(chip, WAKEEN) & ~STATESTS_INT_MASK);
trace_azx_runtime_resume(chip);
return 0;
@@ -1175,6 +1179,8 @@ static int azx_runtime_idle(struct device *dev)
static const struct dev_pm_ops azx_pm = {
SET_SYSTEM_SLEEP_PM_OPS(azx_suspend, azx_resume)
#ifdef CONFIG_PM_SLEEP
+ .prepare = azx_prepare,
+ .complete = azx_complete,
.freeze_noirq = azx_freeze_noirq,
.thaw_noirq = azx_thaw_noirq,
#endif
--
2.27.0
^ permalink raw reply related [flat|nested] 4+ messages in thread