July 2022 - Alsa-devel - mailman.alsa-project.org

[PATCH v6 0/4] Let userspace know when snd-hda-intel needs i915
by Mauro Carvalho Chehab 28 Sep '22

28 Sep '22

Currently, kernel/module annotates module dependencies when request_symbol is used, but it doesn't cover more complex inter-driver dependencies that are subsystem and/or driver-specific. That's because module_try_get() and symbol_get() doesn't try to setup the module owner. In the case of hdmi sound, depending on the CPU/GPU, sometimes the snd_hda_driver can talk directly with the hardware, but sometimes, it uses the i915 driver. When the snd_hda_driver uses i915, it should first be unbind/rmmod, as otherwise trying to unbind/rmmod the i915 driver cause driver issues, as as reported by CI tools with different GPU models: https://intel-gfx-ci.01.org/tree/drm-tip/IGT_6415/fi-tgl-1115g4/igt@core_ho… https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_11495/bat-adlm-1/igt@i915_m… In the past, just a few CPUs were doing such bindings, but this issue now applies to all "modern" Intel CPUs that have onboard graphics, as well as to the newer discrete GPUs. With the discrete GPU case, the HDA controller is physically separate and requires i915 to power on the hardware for all hardware access. In this case, the issue is hit basicly 100% of the time. With on-board graphics, i915 driver is needed only when the display codec is accessed. If i915 is unbind during runtime suspend, while snd-hda-intel is still bound, nothing bad happens, but unbinding i915 on other situations may also cause issues. So, add support at kernel/modules to properly set the holders when try_module_get() and symbol_get() are used. This allow allow audio drivers to properly annotate when a dependency on a DRM driver dependencies exists, and add a call to such new function at the snd-hda driver when it successfully binds into the DRM driver. With that, userspace tools can now check and properly remove the audio driver before trying to remove or unbind the GPU driver. It should be noticed that this series conveys the hidden module dependencies. Other changes are needed in order to allow removing or unbinding the i915 driver while keeping the snd-hda-intel driver loaded/bound. With that regards, there are some discussions on how to improve this at alsa-devel a while back: https://mailman.alsa-project.org/pipermail/alsa-devel/2021-September/190099… So, future improvements on both in i915 and the audio drivers could be made. E.g. with discrete GPUs, it's the only codec of the card, so it seems feasible to detach the ALSA card if i915 is bound (using infra made for VGA switcheroo), but, until these improvements are done and land in upstream, audio drivers needs to be unbound if i915 driver goes unbind. Yet, even if such fixes got merged, this series is still needed, as it makes such dependencies more explicit and easier to debug. PS.: This series was generated against next-20220506. --- v6: - dropped an unused function prototype for __symbol_get_gpl(); - addressed several issues that were noticed while testing the series on an slow atom machine; - also add holders when symbol_get() is used. v5: - while v4 works fine, it ends calling try_module_format() recursively, which is not what it it was supposed to do. So, change the logic to avoid such recursion, by adding a static __try_module_format() and renaming the new version that takes two arguments as try_module_format_owner(). v4: - fix a compilation warning reported by Intel's Kernel robot when !CONFIG_MODULE_UNLOAD or !CONFIG_MODULE. v3: minor fixes: - fixed a checkpatch warning; - use a single line for the new function prototype. v2: - the dependencies are now handled directly at try_module_get(). Mauro Carvalho Chehab (4): module: drop prototype for non-existing __symbol_get_gpl() module: update dependencies at try_module_get() module: set holders when symbol_get() is used ALSA: hda - identify when audio is provided by a video driver drivers/mtd/chips/gen_probe.c | 4 +- include/linux/module.h | 13 +++-- kernel/module/main.c | 76 ++++++++++++++++++++----- samples/hw_breakpoint/data_breakpoint.c | 2 +- sound/hda/hdac_component.c | 2 +- 5 files changed, 72 insertions(+), 25 deletions(-) -- 2.35.3

5 9

[PATCH v2 0/3] ASoC: dt-bindings: Add bindings for WCD9335 DAIs
by Yassine Oudjana 15 Sep '22

15 Sep '22

Add DT bindings for WCD9335 DAIs and use them in the driver as well as all device trees currently using WCD9335. Changes since v1: - Make header guard match path - Maintain the alphabetical order in msm8996-xiaomi-gemini includes Yassine Oudjana (3): ASoC: dt-bindings: Add bindings for WCD9335 DAIs ASoC: wcd9335: Use DT bindings instead of local DAI definitions arm64: dts: qcom: Use WCD9335 DT bindings MAINTAINERS | 1 + arch/arm64/boot/dts/qcom/apq8096-db820c.dts | 5 +++-- .../arm64/boot/dts/qcom/msm8996-xiaomi-gemini.dts | 5 +++-- .../boot/dts/qcom/msm8996-xiaomi-scorpio.dts | 5 +++-- include/dt-bindings/sound/qcom,wcd9335.h | 15 +++++++++++++++ sound/soc/codecs/wcd9335.c | 13 ++----------- 6 files changed, 27 insertions(+), 17 deletions(-) create mode 100644 include/dt-bindings/sound/qcom,wcd9335.h -- 2.36.1

4 6

[PATCH] ALSA: usb-audio: Refcount multiple accesses on the single clock
by Takashi Iwai 05 Sep '22

05 Sep '22

When a clock source is connected to multiple nodes / endpoints, the current USB-audio driver tries to set up at each time one of them is configured. Although it reads the current rate and updates only if it differs, some devices seem unhappy with this behavior and spew the errors when reading/updating the rate unnecessarily. This patch tries to reduce the redundant clock setup by introducing a refcount for each clock source. When the stream is actually running, a clock rate is "locked", and it bypasses the clock and/or refuse to change any longer. BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=215934 Signed-off-by: Takashi Iwai <tiwai(a)suse.de> --- sound/usb/card.c | 1 + sound/usb/card.h | 3 +- sound/usb/endpoint.c | 90 +++++++++++++++++++++++++++++++++++++++----- sound/usb/usbaudio.h | 1 + 4 files changed, 85 insertions(+), 10 deletions(-) diff --git a/sound/usb/card.c b/sound/usb/card.c index 376962291c4d..0fff96a5d3ab 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -635,6 +635,7 @@ static int snd_usb_audio_create(struct usb_interface *intf, INIT_LIST_HEAD(&chip->pcm_list); INIT_LIST_HEAD(&chip->ep_list); INIT_LIST_HEAD(&chip->iface_ref_list); + INIT_LIST_HEAD(&chip->clock_ref_list); INIT_LIST_HEAD(&chip->midi_list); INIT_LIST_HEAD(&chip->mixer_list); diff --git a/sound/usb/card.h b/sound/usb/card.h index 87f042d06ce0..ca75f2206170 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -44,6 +44,7 @@ struct audioformat { struct snd_usb_substream; struct snd_usb_iface_ref; +struct snd_usb_clock_ref; struct snd_usb_endpoint; struct snd_usb_power_domain; @@ -62,6 +63,7 @@ struct snd_urb_ctx { struct snd_usb_endpoint { struct snd_usb_audio *chip; struct snd_usb_iface_ref *iface_ref; + struct snd_usb_clock_ref *clock_ref; int opened; /* open refcount; protect with chip->mutex */ atomic_t running; /* running status */ @@ -138,7 +140,6 @@ struct snd_usb_endpoint { unsigned int cur_period_frames; unsigned int cur_period_bytes; unsigned int cur_buffer_periods; - unsigned char cur_clock; spinlock_t lock; struct list_head list; diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c index 743b8287cfcd..df5a70013a85 100644 --- a/sound/usb/endpoint.c +++ b/sound/usb/endpoint.c @@ -35,6 +35,14 @@ struct snd_usb_iface_ref { struct list_head list; }; +/* clock refcounting */ +struct snd_usb_clock_ref { + unsigned char clock; + atomic_t locked; + int rate; + struct list_head list; +}; + /* * snd_usb_endpoint is a model that abstracts everything related to an * USB endpoint and its streaming. @@ -591,6 +599,25 @@ iface_ref_find(struct snd_usb_audio *chip, int iface) return ip; } +/* Similarly, a refcount object for clock */ +static struct snd_usb_clock_ref * +clock_ref_find(struct snd_usb_audio *chip, int clock) +{ + struct snd_usb_clock_ref *ref; + + list_for_each_entry(ref, &chip->clock_ref_list, list) + if (ref->clock == clock) + return ref; + + ref = kzalloc(sizeof(*ref), GFP_KERNEL); + if (!ref) + return NULL; + ref->clock = clock; + atomic_set(&ref->locked, 0); + list_add_tail(&ref->list, &chip->clock_ref_list); + return ref; +} + /* * Get the existing endpoint object corresponding EP * Returns NULL if not present. @@ -768,6 +795,14 @@ snd_usb_endpoint_open(struct snd_usb_audio *chip, goto unlock; } + if (fp->protocol != UAC_VERSION_1) { + ep->clock_ref = clock_ref_find(chip, fp->clock); + if (!ep->clock_ref) { + ep = NULL; + goto unlock; + } + } + ep->cur_audiofmt = fp; ep->cur_channels = fp->channels; ep->cur_rate = params_rate(params); @@ -777,7 +812,6 @@ snd_usb_endpoint_open(struct snd_usb_audio *chip, ep->cur_period_frames = params_period_size(params); ep->cur_period_bytes = ep->cur_period_frames * ep->cur_frame_bytes; ep->cur_buffer_periods = params_periods(params); - ep->cur_clock = fp->clock; if (ep->type == SND_USB_ENDPOINT_TYPE_SYNC) endpoint_set_syncinterval(chip, ep); @@ -894,8 +928,8 @@ void snd_usb_endpoint_close(struct snd_usb_audio *chip, ep->altsetting = 0; ep->cur_audiofmt = NULL; ep->cur_rate = 0; - ep->cur_clock = 0; ep->iface_ref = NULL; + ep->clock_ref = NULL; usb_audio_dbg(chip, "EP 0x%x closed\n", ep->ep_num); } mutex_unlock(&chip->mutex); @@ -907,6 +941,8 @@ void snd_usb_endpoint_suspend(struct snd_usb_endpoint *ep) ep->need_setup = true; if (ep->iface_ref) ep->iface_ref->need_setup = true; + if (ep->clock_ref) + ep->clock_ref->rate = 0; } /* @@ -1314,6 +1350,33 @@ static int snd_usb_endpoint_set_params(struct snd_usb_audio *chip, return 0; } +static int init_sample_rate(struct snd_usb_audio *chip, + struct snd_usb_endpoint *ep) +{ + struct snd_usb_clock_ref *clock = ep->clock_ref; + int err; + + if (clock) { + if (atomic_read(&clock->locked)) + return 0; + if (clock->rate == ep->cur_rate) + return 0; + if (clock->rate && clock->rate != ep->cur_rate) { + usb_audio_dbg(chip, "Mismatched sample rate %d vs %d for EP 0x%x\n", + clock->rate, ep->cur_rate, ep->ep_num); + return -EINVAL; + } + } + + err = snd_usb_init_sample_rate(chip, ep->cur_audiofmt, ep->cur_rate); + if (err < 0) + return err; + + if (clock) + clock->rate = ep->cur_rate; + return 0; +} + /* * snd_usb_endpoint_configure: Configure the endpoint * @@ -1343,8 +1406,7 @@ int snd_usb_endpoint_configure(struct snd_usb_audio *chip, * to update at each EP configuration */ if (ep->cur_audiofmt->protocol == UAC_VERSION_1) { - err = snd_usb_init_sample_rate(chip, ep->cur_audiofmt, - ep->cur_rate); + err = init_sample_rate(chip, ep); if (err < 0) goto unlock; } @@ -1374,7 +1436,7 @@ int snd_usb_endpoint_configure(struct snd_usb_audio *chip, if (err < 0) goto unlock; - err = snd_usb_init_sample_rate(chip, ep->cur_audiofmt, ep->cur_rate); + err = init_sample_rate(chip, ep); if (err < 0) goto unlock; @@ -1407,15 +1469,15 @@ int snd_usb_endpoint_configure(struct snd_usb_audio *chip, /* get the current rate set to the given clock by any endpoint */ int snd_usb_endpoint_get_clock_rate(struct snd_usb_audio *chip, int clock) { - struct snd_usb_endpoint *ep; + struct snd_usb_clock_ref *ref; int rate = 0; if (!clock) return 0; mutex_lock(&chip->mutex); - list_for_each_entry(ep, &chip->ep_list, list) { - if (ep->cur_clock == clock && ep->cur_rate) { - rate = ep->cur_rate; + list_for_each_entry(ref, &chip->clock_ref_list, list) { + if (ref->clock == clock) { + rate = ref->rate; break; } } @@ -1456,6 +1518,9 @@ int snd_usb_endpoint_start(struct snd_usb_endpoint *ep) if (atomic_inc_return(&ep->running) != 1) return 0; + if (ep->clock_ref) + atomic_inc(&ep->clock_ref->locked); + ep->active_mask = 0; ep->unlink_mask = 0; ep->phase = 0; @@ -1565,6 +1630,9 @@ void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep, bool keep_pending) if (ep->sync_source) WRITE_ONCE(ep->sync_source->sync_sink, NULL); stop_urbs(ep, false, keep_pending); + if (ep->clock_ref) + if (!atomic_dec_return(&ep->clock_ref->locked)) + ep->clock_ref->rate = 0; } } @@ -1591,12 +1659,16 @@ void snd_usb_endpoint_free_all(struct snd_usb_audio *chip) { struct snd_usb_endpoint *ep, *en; struct snd_usb_iface_ref *ip, *in; + struct snd_usb_clock_ref *cp, *cn; list_for_each_entry_safe(ep, en, &chip->ep_list, list) kfree(ep); list_for_each_entry_safe(ip, in, &chip->iface_ref_list, list) kfree(ip); + + list_for_each_entry_safe(cp, cn, &chip->clock_ref_list, list) + kfree(ip); } /* diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h index 044cd7ab27cb..ffbb4b0d09a0 100644 --- a/sound/usb/usbaudio.h +++ b/sound/usb/usbaudio.h @@ -45,6 +45,7 @@ struct snd_usb_audio { struct list_head pcm_list; /* list of pcm streams */ struct list_head ep_list; /* list of audio-related endpoints */ struct list_head iface_ref_list; /* list of interface refcounts */ + struct list_head clock_ref_list; /* list of clock refcounts */ int pcm_devs; struct list_head midi_list; /* list of midi interfaces */ -- 2.35.3

2 2

[PATCH v2] soundwire: qcom: fix device status array range
by Srinivas Kandagatla 01 Sep '22

01 Sep '22

This patch updates device status array range from 11 to 12 as we will be reading status from device number 0 to device number 11 inclusive. Without this patch we can potentially access status array out of range during auto-enumeration. Fixes: aa1262ca6695 ("soundwire: qcom: Check device status before reading devid") Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla(a)linaro.org> --- drivers/soundwire/qcom.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c index 9df970eeca45..16a4a51978ca 100644 --- a/drivers/soundwire/qcom.c +++ b/drivers/soundwire/qcom.c @@ -169,7 +169,7 @@ struct qcom_swrm_ctrl { u8 wcmd_id; struct qcom_swrm_port_config pconfig[QCOM_SDW_MAX_PORTS]; struct sdw_stream_runtime *sruntime[SWRM_MAX_DAIS]; - enum sdw_slave_status status[SDW_MAX_DEVICES]; + enum sdw_slave_status status[SDW_MAX_DEVICES + 1]; int (*reg_read)(struct qcom_swrm_ctrl *ctrl, int reg, u32 *val); int (*reg_write)(struct qcom_swrm_ctrl *ctrl, int reg, int val); u32 slave_status; @@ -420,7 +420,7 @@ static int qcom_swrm_get_alert_slave_dev_num(struct qcom_swrm_ctrl *ctrl) ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &val); - for (dev_num = 0; dev_num < SDW_MAX_DEVICES; dev_num++) { + for (dev_num = 0; dev_num <= SDW_MAX_DEVICES; dev_num++) { status = (val >> (dev_num * SWRM_MCP_SLV_STATUS_SZ)); if ((status & SWRM_MCP_SLV_STATUS_MASK) == SDW_SLAVE_ALERT) { @@ -440,7 +440,7 @@ static void qcom_swrm_get_device_status(struct qcom_swrm_ctrl *ctrl) ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &val); ctrl->slave_status = val; - for (i = 0; i < SDW_MAX_DEVICES; i++) { + for (i = 0; i <= SDW_MAX_DEVICES; i++) { u32 s; s = (val >> (i * 2)); -- 2.25.1

2 1

[PATCH] sound: soc/codecs: tlv320adc3xxx: needs GPIOLIB
by Randy Dunlap 31 Aug '22

31 Aug '22

Fix build errors when CONFIG_GPIOLIB is not enabled: ../sound/soc/codecs/tlv320adc3xxx.c: In function 'adc3xxx_i2c_probe': ../sound/soc/codecs/tlv320adc3xxx.c:1352:28: error: implicit declaration of function 'devm_gpiod_get'; did you mean 'devm_gpio_free'? [-Werror=implicit-function-declaration] 1352 | adc3xxx->rst_pin = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); ../sound/soc/codecs/tlv320adc3xxx.c:1352:57: error: 'GPIOD_OUT_LOW' undeclared (first use in this function); did you mean 'GPIOF_INIT_LOW'? 1352 | adc3xxx->rst_pin = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); CC lib/dynamic_debug.o ../sound/soc/codecs/tlv320adc3xxx.c:1400:9: error: implicit declaration of function 'gpiod_set_value_cansleep'; did you mean 'gpio_set_value_cansleep'? [-Werror=implicit-function-declaration] 1400 | gpiod_set_value_cansleep(adc3xxx->rst_pin, 1); Fixes: e9a3b57efd28 ("ASoC: codec: tlv320adc3xxx: New codec driver") Signed-off-by: Randy Dunlap <rdunlap(a)infradead.org> Reported-by: kernel test robot <lkp(a)intel.com> Cc: Mark Brown <broonie(a)kernel.org> Cc: Liam Girdwood <lgirdwood(a)gmail.com> Cc: Ricard Wanderlof <ricardw(a)axis.com> Cc: Jaroslav Kysela <perex(a)perex.cz> Cc: Takashi Iwai <tiwai(a)suse.com> Cc: alsa-devel(a)alsa-project.org --- sound/soc/codecs/Kconfig | 1 + 1 file changed, 1 insertion(+) --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -1567,6 +1567,7 @@ config SND_SOC_TFA989X config SND_SOC_TLV320ADC3XXX tristate "Texas Instruments TLV320ADC3001/3101 audio ADC" depends on I2C + depends on GPIOLIB help Enable support for Texas Instruments TLV320ADC3001 and TLV320ADC3101 ADCs.

1 1

[PATCH -next 0/2] ASoC: Cleanup deprecated regmap-irq functionality
by Aidan MacDonald 29 Aug '22

29 Aug '22

Update two ASoC codec drivers to remove uses of regmap-irq type registers, which have recently been deprecated by the "regmap-irq cleanups and refactoring" series in linux-next. Link: https://lore.kernel.org/lkml/20220623211420.918875-1-aidanmacdonald.0x0@gma… Aidan MacDonald (2): sound: soc: codecs: wcd9335: Convert irq chip to config regs sound: soc: codecs: wcd938x: Remove spurious type_base from irq chip sound/soc/codecs/wcd9335.c | 10 ++++++++-- sound/soc/codecs/wcd938x.c | 1 - 2 files changed, 8 insertions(+), 3 deletions(-) base-commit: 353f7988dd8413c47718f7ca79c030b6fb62cfe5 prerequisite-patch-id: a45db1cac7537769dc10087fc61f977dc150744c prerequisite-patch-id: cb8aa009c7bb7a6575eb05e3af65342dc8d0efa3 prerequisite-patch-id: 8d32557e53b894d1fb17250d2d0eb3673f068d37 prerequisite-patch-id: 5b293867ef81e3697892ac51b941bb53680a70dc prerequisite-patch-id: 8138d39a4817e804141bfe8c2ad37d9c55456a40 prerequisite-patch-id: b01216129e887519d441cf556bbc75c397871773 prerequisite-patch-id: b5dcf0c0609113c2d81bc557c1fc95ef23f40811 prerequisite-patch-id: 622ca1c10e851b1889aaa567c1d2a0adf43cca44 prerequisite-patch-id: d28c5187f9bf0e43f27b2f4aa8dcf7fd91842a03 prerequisite-patch-id: d29d54b756be73304f844abeeaf9b46a5c0119d5 prerequisite-patch-id: 5d405790ae89c0831b46a359f86e94bac5a67470 prerequisite-patch-id: c90120e79acbb52ffa148bfedee1df9d35b5eced prerequisite-patch-id: 2e35247a5cfe5a28565c9272b85fc6835011b032 -- 2.35.1

2 4

Request for setup of new repositories
by Takashi Sakamoto 27 Aug '22

27 Aug '22

Hi Jaroslav, Iwai-san, Thanks for your maintenance for alsa-project organization in github.com. Currently I'd like to add new three repositories under the organization as a part of my work for ALSA firewire stack. I've been maintaining libhinawa since 2014 and recently realized that current design is not necessarily convenient since it includes two functions; operation to Linux FireWire cdev, and operation of ALSA HwDep cdev. Currently I'm working for new library to split the latter operation. Then I'd like you to setup below repositories: * 'libhitaki' * 'libhitaki-doc' * 'hitaki-rs' The library itself and its Rust binding are utilized by 'snd-firewire-ctl-services'[2], thus it's preferable to register them under 'GObject Introspection' Team. Thanks for your assist for my work. [1] https://github.com/alsa-project/libhinawa [2] https://github.com/alsa-project/snd-firewire-ctl-services Regards Takashi Sakamoto

2 20

[PATCH 1/2] lib/string_helpers: Introduce strsplit_u32()
by Cezary Rojewski 25 Aug '22

25 Aug '22

Add strsplit_u32() and its __user variant to allow for splitting specified string into array of u32 tokens. Originally this functionality was added for the SOF sound driver. As more users are on the horizon, relocate it so it becomes a common good. Signed-off-by: Cezary Rojewski <cezary.rojewski(a)intel.com> --- include/linux/string_helpers.h | 3 + lib/string_helpers.c | 96 +++++++++++++++++++++++++++++++ sound/soc/sof/sof-client-probes.c | 51 +--------------- 3 files changed, 100 insertions(+), 50 deletions(-) diff --git a/include/linux/string_helpers.h b/include/linux/string_helpers.h index 4d72258d42fd..a4630ddfca27 100644 --- a/include/linux/string_helpers.h +++ b/include/linux/string_helpers.h @@ -126,4 +126,7 @@ static inline const char *str_enabled_disabled(bool v) return v ? "enabled" : "disabled"; } +int strsplit_u32(const char *str, const char *delim, u32 **tkns, size_t *num_tkns); +int strsplit_u32_user(const char __user *from, size_t count, loff_t *ppos, const char *delim, + u32 **tkns, size_t *num_tkns); #endif diff --git a/lib/string_helpers.c b/lib/string_helpers.c index 5ed3beb066e6..bb24f0c62539 100644 --- a/lib/string_helpers.c +++ b/lib/string_helpers.c @@ -984,3 +984,99 @@ void fortify_panic(const char *name) } EXPORT_SYMBOL(fortify_panic); #endif /* CONFIG_FORTIFY_SOURCE */ + +/** + * strsplit_u32 - Split string into sequence of u32 tokens + * @str: The string to split into tokens. + * @delim: The string containing delimiter characters. + * @tkns: Returned u32 sequence pointer. + * @num_tkns: Returned number of tokens obtained. + * + * On success @num_tkns and @tkns are assigned the number of tokens extracted + * and the array itself respectively. + * Caller takes responsibility for freeing @tkns when no longer needed. + */ +int strsplit_u32(const char *str, const char *delim, u32 **tkns, size_t *num_tkns) +{ + size_t max_count = 32; + size_t count = 0; + char *s, **p; + u32 *buf, *tmp; + int ret = 0; + + p = (char **)&str; + *tkns = NULL; + *num_tkns = 0; + + buf = kcalloc(max_count, sizeof(*buf), GFP_KERNEL); + if (!buf) + return -ENOMEM; + + while ((s = strsep(p, delim)) != NULL) { + ret = kstrtouint(s, 0, buf + count); + if (ret) + goto free_buf; + + if (++count > max_count) { + max_count *= 2; + tmp = krealloc(buf, max_count * sizeof(*buf), GFP_KERNEL); + if (!tmp) { + ret = -ENOMEM; + goto free_buf; + } + buf = tmp; + } + } + + if (!count) + goto free_buf; + *tkns = kmemdup(buf, count * sizeof(*buf), GFP_KERNEL); + if (*tkns == NULL) { + ret = -ENOMEM; + goto free_buf; + } + *num_tkns = count; + +free_buf: + kfree(buf); + return ret; +} +EXPORT_SYMBOL(strsplit_u32); + +/** + * strsplit_u32_user - Split string into sequence of u32 tokens + * @from: The user space buffer to read from + * @ppos: The current position in the buffer + * @count: The maximum number of bytes to read + * @delim: The string containing delimiter characters. + * @tkns: Returned u32 sequence pointer. + * @num_tkns: Returned number of tokens obtained. + * + * On success @num_tkns and @tkns are assigned the number of tokens extracted + * and the array itself respectively. + * Caller takes responsibility for freeing @tkns when no longer needed. + */ +int strsplit_u32_user(const char __user *from, size_t count, loff_t *ppos, const char *delim, + u32 **tkns, size_t *num_tkns) +{ + char *buf; + int ret; + + buf = kmalloc(count + 1, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + ret = simple_write_to_buffer(buf, count, ppos, from, count); + if (ret != count) { + ret = (ret < 0) ? ret : -EIO; + goto free_buf; + } + + buf[count] = '\0'; + ret = strsplit_u32(buf, delim, tkns, num_tkns); + +free_buf: + kfree(buf); + return ret; +} +EXPORT_SYMBOL(strsplit_u32_user); diff --git a/sound/soc/sof/sof-client-probes.c b/sound/soc/sof/sof-client-probes.c index 1f1ea93a7fbf..48ebbe58e2b9 100644 --- a/sound/soc/sof/sof-client-probes.c +++ b/sound/soc/sof/sof-client-probes.c @@ -12,6 +12,7 @@ #include <linux/debugfs.h> #include <linux/module.h> #include <linux/pm_runtime.h> +#include <linux/string_helpers.h> #include <sound/soc.h> #include <sound/sof/header.h> #include "sof-client.h" @@ -410,56 +411,6 @@ static const struct snd_compress_ops sof_probes_compressed_ops = { .copy = sof_probes_compr_copy, }; -/** - * strsplit_u32 - Split string into sequence of u32 tokens - * @buf: String to split into tokens. - * @delim: String containing delimiter characters. - * @tkns: Returned u32 sequence pointer. - * @num_tkns: Returned number of tokens obtained. - */ -static int strsplit_u32(char *buf, const char *delim, u32 **tkns, size_t *num_tkns) -{ - char *s; - u32 *data, *tmp; - size_t count = 0; - size_t cap = 32; - int ret = 0; - - *tkns = NULL; - *num_tkns = 0; - data = kcalloc(cap, sizeof(*data), GFP_KERNEL); - if (!data) - return -ENOMEM; - - while ((s = strsep(&buf, delim)) != NULL) { - ret = kstrtouint(s, 0, data + count); - if (ret) - goto exit; - if (++count >= cap) { - cap *= 2; - tmp = krealloc(data, cap * sizeof(*data), GFP_KERNEL); - if (!tmp) { - ret = -ENOMEM; - goto exit; - } - data = tmp; - } - } - - if (!count) - goto exit; - *tkns = kmemdup(data, count * sizeof(*data), GFP_KERNEL); - if (!(*tkns)) { - ret = -ENOMEM; - goto exit; - } - *num_tkns = count; - -exit: - kfree(data); - return ret; -} - static int tokenize_input(const char __user *from, size_t count, loff_t *ppos, u32 **tkns, size_t *num_tkns) { -- 2.25.1

5 29

[PATCH 1/5] soundwire: sysfs: move sdw_slave_dev_attr_group into the existing list of groups
by Greg Kroah-Hartman 24 Aug '22

24 Aug '22

The sysfs logic already creates a list of groups for the device, so add the sdw_slave_dev_attr_group group to that list instead of having to do a two-step process of adding a group list and then an individual group. This is a step on the way to moving all of the sysfs attribute handling into the default driver core attribute group logic so that the soundwire core does not have to do any of it manually. Cc: Vinod Koul <vkoul(a)kernel.org> Cc: Bard Liao <yung-chuan.liao(a)linux.intel.com> Cc: Pierre-Louis Bossart <pierre-louis.bossart(a)linux.intel.com> Cc: Sanyog Kale <sanyog.r.kale(a)intel.com> Cc: alsa-devel(a)alsa-project.org Cc: linux-kernel(a)vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/soundwire/sysfs_slave.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/soundwire/sysfs_slave.c b/drivers/soundwire/sysfs_slave.c index 3210359cd944..83e3f6cc3250 100644 --- a/drivers/soundwire/sysfs_slave.c +++ b/drivers/soundwire/sysfs_slave.c @@ -105,7 +105,10 @@ static struct attribute *slave_attrs[] = { &dev_attr_modalias.attr, NULL, }; -ATTRIBUTE_GROUPS(slave); + +static const struct attribute_group slave_attr_group = { + .attrs = slave_attrs, +}; static struct attribute *slave_dev_attrs[] = { &dev_attr_mipi_revision.attr, @@ -190,6 +193,12 @@ static const struct attribute_group dp0_group = { .name = "dp0", }; +static const struct attribute_group *slave_groups[] = { + &slave_attr_group, + &sdw_slave_dev_attr_group, + NULL, +}; + int sdw_slave_sysfs_init(struct sdw_slave *slave) { int ret; @@ -198,10 +207,6 @@ int sdw_slave_sysfs_init(struct sdw_slave *slave) if (ret < 0) return ret; - ret = devm_device_add_group(&slave->dev, &sdw_slave_dev_attr_group); - if (ret < 0) - return ret; - if (slave->prop.dp0_prop) { ret = devm_device_add_group(&slave->dev, &dp0_group); if (ret < 0) -- 2.37.1

3 23

[PATCH 0/3] ASoC: SOF: Intel: hda: Correct Firmware State Register use
by Peter Ujfalusi 23 Aug '22

23 Aug '22

Hi, The FSR (Firmware State Register) holds the ROM state information, it does not contain error information. The FSR itself is a bit more complicated as well as the state depends on the module currently in use. The error code from ROM or the status code from the firmware is located at the next register. Fix the handling of the FSR in order to provide usable and human readable (in most cases) report on the status and error. Regards, Peter --- Peter Ujfalusi (3): ASoC: SOF: Intel: hda: Correct the ROM/FW state reporting code ASoC: SOF: Intel: hda-loader: Use the FSR state definitions during bootup ASoC: SOF: Intel: hda: Drop no longer used ROM state definitions sound/soc/sof/intel/hda-loader.c | 10 +-- sound/soc/sof/intel/hda.c | 147 ++++++++++++++++++++++++++----- sound/soc/sof/intel/hda.h | 69 +++++++++++++-- 3 files changed, 194 insertions(+), 32 deletions(-) -- 2.37.0

2 5