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Subject[PATCH AUTOSEL 5.14 10/26] ALSA: hda: intel: Allow repeatedly probing on codec configuration errors
Date
From: Takashi Iwai <tiwai@suse.de>

[ Upstream commit c0f1886de7e173865f1a0fa7680a1c07954a987f ]

It seems that a few recent AMD systems show the codec configuration
errors at the early boot, while loading the driver at a later stage
works magically. Although the root cause of the error isn't clear,
it's certainly not bad to allow retrying the codec probe in such a
case if that helps.

This patch adds the capability for retrying the probe upon codec probe
errors on the certain AMD platforms. The probe_work is changed to a
delayed work, and at the secondary call, it'll jump to the codec
probing.

Note that, not only adding the re-probing, this includes the behavior
changes in the codec configuration function. Namely,
snd_hda_codec_configure() won't unregister the codec at errors any
longer. Instead, its caller, azx_codec_configure() unregisters the
codecs with the probe failures *if* any codec has been successfully
configured. If all codec probe failed, it doesn't unregister but let
it re-probed -- which is the most case we're seeing and this patch
tries to improve.

Even if the driver doesn't re-probe or give up, it will go to the
"free-all" error path, hence the leftover codecs shall be disabled /
deleted in anyway.

BugLink: https://bugzilla.suse.com/show_bug.cgi?id=1190801
Link: https://lore.kernel.org/r/20211006141940.2897-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
include/sound/hda_codec.h | 1 +
sound/pci/hda/hda_bind.c | 20 +++++++++++---------
sound/pci/hda/hda_codec.c | 1 +
sound/pci/hda/hda_controller.c | 24 ++++++++++++++++--------
sound/pci/hda/hda_controller.h | 2 +-
sound/pci/hda/hda_intel.c | 29 +++++++++++++++++++++++------
sound/pci/hda/hda_intel.h | 4 +++-
7 files changed, 56 insertions(+), 25 deletions(-)

diff --git a/include/sound/hda_codec.h b/include/sound/hda_codec.h
index 2e8d51937acd..47d2cad21b56 100644
--- a/include/sound/hda_codec.h
+++ b/include/sound/hda_codec.h
@@ -225,6 +225,7 @@ struct hda_codec {
#endif

/* misc flags */
+ unsigned int configured:1; /* codec was configured */
unsigned int in_freeing:1; /* being released */
unsigned int registered:1; /* codec was registered */
unsigned int display_power_control:1; /* needs display power */
diff --git a/sound/pci/hda/hda_bind.c b/sound/pci/hda/hda_bind.c
index e8dee24c309d..50a58fb5ad9c 100644
--- a/sound/pci/hda/hda_bind.c
+++ b/sound/pci/hda/hda_bind.c
@@ -304,29 +304,31 @@ int snd_hda_codec_configure(struct hda_codec *codec)
{
int err;

+ if (codec->configured)
+ return 0;
+
if (is_generic_config(codec))
codec->probe_id = HDA_CODEC_ID_GENERIC;
else
codec->probe_id = 0;

- err = snd_hdac_device_register(&codec->core);
- if (err < 0)
- return err;
+ if (!device_is_registered(&codec->core.dev)) {
+ err = snd_hdac_device_register(&codec->core);
+ if (err < 0)
+ return err;
+ }

if (!codec->preset)
codec_bind_module(codec);
if (!codec->preset) {
err = codec_bind_generic(codec);
if (err < 0) {
- codec_err(codec, "Unable to bind the codec\n");
- goto error;
+ codec_dbg(codec, "Unable to bind the codec\n");
+ return err;
}
}

+ codec->configured = 1;
return 0;
-
- error:
- snd_hdac_device_unregister(&codec->core);
- return err;
}
EXPORT_SYMBOL_GPL(snd_hda_codec_configure);
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 7a717e151156..8afcce6478cd 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -791,6 +791,7 @@ void snd_hda_codec_cleanup_for_unbind(struct hda_codec *codec)
snd_array_free(&codec->nids);
remove_conn_list(codec);
snd_hdac_regmap_exit(&codec->core);
+ codec->configured = 0;
}
EXPORT_SYMBOL_GPL(snd_hda_codec_cleanup_for_unbind);

diff --git a/sound/pci/hda/hda_controller.c b/sound/pci/hda/hda_controller.c
index ca2f2ecd1488..5a49ee4f6ce0 100644
--- a/sound/pci/hda/hda_controller.c
+++ b/sound/pci/hda/hda_controller.c
@@ -25,6 +25,7 @@
#include <sound/core.h>
#include <sound/initval.h>
#include "hda_controller.h"
+#include "hda_local.h"

#define CREATE_TRACE_POINTS
#include "hda_controller_trace.h"
@@ -1259,17 +1260,24 @@ EXPORT_SYMBOL_GPL(azx_probe_codecs);
int azx_codec_configure(struct azx *chip)
{
struct hda_codec *codec, *next;
+ int success = 0;

- /* use _safe version here since snd_hda_codec_configure() deregisters
- * the device upon error and deletes itself from the bus list.
- */
- list_for_each_codec_safe(codec, next, &chip->bus) {
- snd_hda_codec_configure(codec);
+ list_for_each_codec(codec, &chip->bus) {
+ if (!snd_hda_codec_configure(codec))
+ success++;
}

- if (!azx_bus(chip)->num_codecs)
- return -ENODEV;
- return 0;
+ if (success) {
+ /* unregister failed codecs if any codec has been probed */
+ list_for_each_codec_safe(codec, next, &chip->bus) {
+ if (!codec->configured) {
+ codec_err(codec, "Unable to configure, disabling\n");
+ snd_hdac_device_unregister(&codec->core);
+ }
+ }
+ }
+
+ return success ? 0 : -ENODEV;
}
EXPORT_SYMBOL_GPL(azx_codec_configure);

diff --git a/sound/pci/hda/hda_controller.h b/sound/pci/hda/hda_controller.h
index 68f9668788ea..324cba13c7ba 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 */
-/* 27 unused */
+#define AZX_DCAPS_RETRY_PROBE (1 << 27) /* retry probe if no codec is configured */
#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 */
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 0062c18b646a..89f135a6a1f6 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -307,7 +307,8 @@ enum {
/* quirks for AMD SB */
#define AZX_DCAPS_PRESET_AMD_SB \
(AZX_DCAPS_NO_TCSEL | AZX_DCAPS_AMD_WORKAROUND |\
- AZX_DCAPS_SNOOP_TYPE(ATI) | AZX_DCAPS_PM_RUNTIME)
+ AZX_DCAPS_SNOOP_TYPE(ATI) | AZX_DCAPS_PM_RUNTIME |\
+ AZX_DCAPS_RETRY_PROBE)

/* quirks for Nvidia */
#define AZX_DCAPS_PRESET_NVIDIA \
@@ -1730,7 +1731,7 @@ static void azx_check_snoop_available(struct azx *chip)

static void azx_probe_work(struct work_struct *work)
{
- struct hda_intel *hda = container_of(work, struct hda_intel, probe_work);
+ struct hda_intel *hda = container_of(work, struct hda_intel, probe_work.work);
azx_probe_continue(&hda->chip);
}

@@ -1839,7 +1840,7 @@ static int azx_create(struct snd_card *card, struct pci_dev *pci,
}

/* continue probing in work context as may trigger request module */
- INIT_WORK(&hda->probe_work, azx_probe_work);
+ INIT_DELAYED_WORK(&hda->probe_work, azx_probe_work);

*rchip = chip;

@@ -2170,7 +2171,7 @@ static int azx_probe(struct pci_dev *pci,
#endif

if (schedule_probe)
- schedule_work(&hda->probe_work);
+ schedule_delayed_work(&hda->probe_work, 0);

dev++;
if (chip->disabled)
@@ -2256,6 +2257,11 @@ static int azx_probe_continue(struct azx *chip)
int dev = chip->dev_index;
int err;

+ if (chip->disabled || hda->init_failed)
+ return -EIO;
+ if (hda->probe_retry)
+ goto probe_retry;
+
to_hda_bus(bus)->bus_probing = 1;
hda->probe_continued = 1;

@@ -2317,10 +2323,20 @@ static int azx_probe_continue(struct azx *chip)
#endif
}
#endif
+
+ probe_retry:
if (bus->codec_mask && !(probe_only[dev] & 1)) {
err = azx_codec_configure(chip);
- if (err < 0)
+ if (err) {
+ if ((chip->driver_caps & AZX_DCAPS_RETRY_PROBE) &&
+ ++hda->probe_retry < 60) {
+ schedule_delayed_work(&hda->probe_work,
+ msecs_to_jiffies(1000));
+ return 0; /* keep things up */
+ }
+ dev_err(chip->card->dev, "Cannot probe codecs, giving up\n");
goto out_free;
+ }
}

err = snd_card_register(chip->card);
@@ -2350,6 +2366,7 @@ static int azx_probe_continue(struct azx *chip)
display_power(chip, false);
complete_all(&hda->probe_wait);
to_hda_bus(bus)->bus_probing = 0;
+ hda->probe_retry = 0;
return 0;
}

@@ -2375,7 +2392,7 @@ static void azx_remove(struct pci_dev *pci)
* device during cancel_work_sync() call.
*/
device_unlock(&pci->dev);
- cancel_work_sync(&hda->probe_work);
+ cancel_delayed_work_sync(&hda->probe_work);
device_lock(&pci->dev);

snd_card_free(card);
diff --git a/sound/pci/hda/hda_intel.h b/sound/pci/hda/hda_intel.h
index 3fb119f09040..0f39418f9328 100644
--- a/sound/pci/hda/hda_intel.h
+++ b/sound/pci/hda/hda_intel.h
@@ -14,7 +14,7 @@ struct hda_intel {

/* sync probing */
struct completion probe_wait;
- struct work_struct probe_work;
+ struct delayed_work probe_work;

/* card list (for power_save trigger) */
struct list_head list;
@@ -30,6 +30,8 @@ struct hda_intel {
unsigned int freed:1; /* resources already released */

bool need_i915_power:1; /* the hda controller needs i915 power */
+
+ int probe_retry; /* being probe-retry */
};

#endif
--
2.33.0
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