Merge branch 'for-next' into for-linus

Preparation for 4.17 merge.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

include/linux/usb/audio-v2.h

@@ -34,14 +34,14 @@
  *
  */
 
-static inline bool uac2_control_is_readable(u32 bmControls, u8 control)
+static inline bool uac_v2v3_control_is_readable(u32 bmControls, u8 control)
 {
-	return (bmControls >> (control * 2)) & 0x1;
+	return (bmControls >> ((control - 1) * 2)) & 0x1;
 }
 
-static inline bool uac2_control_is_writeable(u32 bmControls, u8 control)
+static inline bool uac_v2v3_control_is_writeable(u32 bmControls, u8 control)
 {
-	return (bmControls >> (control * 2)) & 0x2;
+	return (bmControls >> ((control - 1) * 2)) & 0x2;
 }
 
 /* 4.7.2 Class-Specific AC Interface Descriptor */

include/sound/emu10k1.h

@@ -1710,6 +1710,7 @@ struct snd_emu10k1 {
 	unsigned int ecard_ctrl;		/* ecard control bits */
 	unsigned int address_mode;		/* address mode */
 	unsigned long dma_mask;			/* PCI DMA mask */
+	bool iommu_workaround;			/* IOMMU workaround needed */
 	unsigned int delay_pcm_irq;		/* in samples */
 	int max_cache_pages;			/* max memory size / PAGE_SIZE */
 	struct snd_dma_buffer silent_page;	/* silent page */
@@ -1718,7 +1719,6 @@ struct snd_emu10k1 {
 	struct snd_dma_buffer p16v_buffer;
 
 	struct snd_util_memhdr *memhdr;		/* page allocation list */
-	struct snd_emu10k1_memblk *reserved_page;	/* reserved page */
 
 	struct list_head mapped_link_head;
 	struct list_head mapped_order_link_head;
@@ -1878,6 +1878,8 @@ void snd_p16v_resume(struct snd_emu10k1 *emu);
 /* memory allocation */
 struct snd_util_memblk *snd_emu10k1_alloc_pages(struct snd_emu10k1 *emu, struct snd_pcm_substream *substream);
 int snd_emu10k1_free_pages(struct snd_emu10k1 *emu, struct snd_util_memblk *blk);
+int snd_emu10k1_alloc_pages_maybe_wider(struct snd_emu10k1 *emu, size_t size,
+					struct snd_dma_buffer *dmab);
 struct snd_util_memblk *snd_emu10k1_synth_alloc(struct snd_emu10k1 *emu, unsigned int size);
 int snd_emu10k1_synth_free(struct snd_emu10k1 *emu, struct snd_util_memblk *blk);
 int snd_emu10k1_synth_bzero(struct snd_emu10k1 *emu, struct snd_util_memblk *blk, int offset, int size);

include/sound/hdaudio.h

@@ -146,6 +146,8 @@ int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
 			int flags, unsigned int verb, unsigned int parm);
 bool snd_hdac_check_power_state(struct hdac_device *hdac,
 		hda_nid_t nid, unsigned int target_state);
+unsigned int snd_hdac_sync_power_state(struct hdac_device *hdac,
+		      hda_nid_t nid, unsigned int target_state);
 /**
  * snd_hdac_read_parm - read a codec parameter
  * @codec: the codec object

include/sound/pcm_oss.h

@@ -57,6 +57,7 @@ struct snd_pcm_oss_runtime {
 	char *buffer;				/* vmallocated period */
 	size_t buffer_used;			/* used length from period buffer */
 	struct mutex params_lock;
+	atomic_t rw_ref;		/* concurrent read/write accesses */
 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 	struct snd_pcm_plugin *plugin_first;
 	struct snd_pcm_plugin *plugin_last;

include/uapi/linux/usb/audio.h

@@ -27,6 +27,7 @@
 /* bInterfaceProtocol values to denote the version of the standard used */
 #define UAC_VERSION_1			0x00
 #define UAC_VERSION_2			0x20
+#define UAC_VERSION_3			0x30
 
 /* A.2 Audio Interface Subclass Codes */
 #define USB_SUBCLASS_AUDIOCONTROL	0x01

sound/core/init.c

@@ -670,7 +670,7 @@ card_id_show_attr(struct device *dev,
 		  struct device_attribute *attr, char *buf)
 {
 	struct snd_card *card = container_of(dev, struct snd_card, card_dev);
-	return snprintf(buf, PAGE_SIZE, "%s\n", card->id);
+	return scnprintf(buf, PAGE_SIZE, "%s\n", card->id);
 }
 
 static ssize_t
@@ -710,7 +710,7 @@ card_number_show_attr(struct device *dev,
 		     struct device_attribute *attr, char *buf)
 {
 	struct snd_card *card = container_of(dev, struct snd_card, card_dev);
-	return snprintf(buf, PAGE_SIZE, "%i\n", card->number);
+	return scnprintf(buf, PAGE_SIZE, "%i\n", card->number);
 }
 
 static DEVICE_ATTR(number, S_IRUGO, card_number_show_attr, NULL);

sound/core/pcm_lib.c

@@ -1129,16 +1129,12 @@ int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond,
 	if (constrs->rules_num >= constrs->rules_all) {
 		struct snd_pcm_hw_rule *new;
 		unsigned int new_rules = constrs->rules_all + 16;
-		new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL);
+		new = krealloc(constrs->rules, new_rules * sizeof(*c),
+			       GFP_KERNEL);
 		if (!new) {
 			va_end(args);
 			return -ENOMEM;
 		}
-		if (constrs->rules) {
-			memcpy(new, constrs->rules,
-			       constrs->rules_num * sizeof(*c));
-			kfree(constrs->rules);
-		}
 		constrs->rules = new;
 		constrs->rules_all = new_rules;
 	}

sound/core/pcm_native.c

@@ -323,7 +323,7 @@ static int constrain_params_by_rules(struct snd_pcm_substream *substream,
 	struct snd_pcm_hw_constraints *constrs =
 					&substream->runtime->hw_constraints;
 	unsigned int k;
-	unsigned int rstamps[constrs->rules_num];
+	unsigned int *rstamps;
 	unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
 	unsigned int stamp;
 	struct snd_pcm_hw_rule *r;
@@ -331,7 +331,7 @@ static int constrain_params_by_rules(struct snd_pcm_substream *substream,
 	struct snd_mask old_mask;
 	struct snd_interval old_interval;
 	bool again;
-	int changed;
+	int changed, err = 0;
 
 	/*
 	 * Each application of rule has own sequence number.
@@ -339,8 +339,9 @@ static int constrain_params_by_rules(struct snd_pcm_substream *substream,
 	 * Each member of 'rstamps' array represents the sequence number of
 	 * recent application of corresponding rule.
 	 */
-	for (k = 0; k < constrs->rules_num; k++)
-		rstamps[k] = 0;
+	rstamps = kcalloc(constrs->rules_num, sizeof(unsigned int), GFP_KERNEL);
+	if (!rstamps)
+		return -ENOMEM;
 
 	/*
 	 * Each member of 'vstamps' array represents the sequence number of
@@ -398,8 +399,10 @@ static int constrain_params_by_rules(struct snd_pcm_substream *substream,
 		}
 
 		changed = r->func(params, r);
-		if (changed < 0)
-			return changed;
+		if (changed < 0) {
+			err = changed;
+			goto out;
+		}
 
 		/*
 		 * When the parameter is changed, notify it to the caller
@@ -430,7 +433,9 @@ static int constrain_params_by_rules(struct snd_pcm_substream *substream,
 	if (again)
 		goto retry;
 
-	return 0;
+ out:
+	kfree(rstamps);
+	return err;
 }
 
 static int fixup_unreferenced_params(struct snd_pcm_substream *substream,

sound/core/vmaster.c

@@ -63,15 +63,18 @@ static int slave_update(struct link_slave *slave)
 	struct snd_ctl_elem_value *uctl;
 	int err, ch;
 
-	uctl = kmalloc(sizeof(*uctl), GFP_KERNEL);
+	uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 	if (!uctl)
 		return -ENOMEM;
 	uctl->id = slave->slave.id;
 	err = slave->slave.get(&slave->slave, uctl);
+	if (err < 0)
+		goto error;
 	for (ch = 0; ch < slave->info.count; ch++)
 		slave->vals[ch] = uctl->value.integer.value[ch];
+ error:
 	kfree(uctl);
-	return 0;
+	return err < 0 ? err : 0;
 }
 
 /* get the slave ctl info and save the initial values */

sound/drivers/aloop.c

@@ -296,6 +296,8 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
 		cable->pause |= stream;
 		loopback_timer_stop(dpcm);
 		spin_unlock(&cable->lock);
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			loopback_active_notify(dpcm);
 		break;
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 	case SNDRV_PCM_TRIGGER_RESUME:
@@ -304,6 +306,8 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
 		cable->pause &= ~stream;
 		loopback_timer_start(dpcm);
 		spin_unlock(&cable->lock);
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			loopback_active_notify(dpcm);
 		break;
 	default:
 		return -EINVAL;
@@ -892,9 +896,11 @@ static int loopback_active_get(struct snd_kcontrol *kcontrol,
 			[kcontrol->id.subdevice][kcontrol->id.device ^ 1];
 	unsigned int val = 0;
 
-	if (cable != NULL)
-		val = (cable->running & (1 << SNDRV_PCM_STREAM_PLAYBACK)) ?
-									1 : 0;
+	if (cable != NULL) {
+		unsigned int running = cable->running ^ cable->pause;
+
+		val = (running & (1 << SNDRV_PCM_STREAM_PLAYBACK)) ? 1 : 0;
+	}
 	ucontrol->value.integer.value[0] = val;
 	return 0;
 }

sound/hda/hdac_device.c

@@ -3,6 +3,7 @@
  */
 
 #include <linux/init.h>
+#include <linux/delay.h>
 #include <linux/device.h>
 #include <linux/slab.h>
 #include <linux/module.h>
@@ -1064,3 +1065,37 @@ bool snd_hdac_check_power_state(struct hdac_device *hdac,
 	return (state == target_state);
 }
 EXPORT_SYMBOL_GPL(snd_hdac_check_power_state);
+/**
+ * snd_hdac_sync_power_state - wait until actual power state matches
+ * with the target state
+ *
+ * @hdac: the HDAC device
+ * @nid: NID to send the command
+ * @target_state: target state to check for
+ *
+ * Return power state or PS_ERROR if codec rejects GET verb.
+ */
+unsigned int snd_hdac_sync_power_state(struct hdac_device *codec,
+			hda_nid_t nid, unsigned int power_state)
+{
+	unsigned long end_time = jiffies + msecs_to_jiffies(500);
+	unsigned int state, actual_state, count;
+
+	for (count = 0; count < 500; count++) {
+		state = snd_hdac_codec_read(codec, nid, 0,
+				AC_VERB_GET_POWER_STATE, 0);
+		if (state & AC_PWRST_ERROR) {
+			msleep(20);
+			break;
+		}
+		actual_state = (state >> 4) & 0x0f;
+		if (actual_state == power_state)
+			break;
+		if (time_after_eq(jiffies, end_time))
+			break;
+		/* wait until the codec reachs to the target state */
+		msleep(1);
+	}
+	return state;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_sync_power_state);

sound/pci/echoaudio/echoaudio.c

@@ -736,8 +736,7 @@ static int pcm_prepare(struct snd_pcm_substream *substream)
 static int pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 {
 	struct echoaudio *chip = snd_pcm_substream_chip(substream);
-	struct snd_pcm_runtime *runtime = substream->runtime;
-	struct audiopipe *pipe = runtime->private_data;
+	struct audiopipe *pipe;
 	int i, err;
 	u32 channelmask = 0;
 	struct snd_pcm_substream *s;

sound/pci/emu10k1/emu10k1_main.c

@@ -36,6 +36,7 @@
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/interrupt.h>
+#include <linux/iommu.h>
 #include <linux/pci.h>
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
@@ -1272,12 +1273,6 @@ static int snd_emu10k1_free(struct snd_emu10k1 *emu)
 	release_firmware(emu->dock_fw);
 	if (emu->irq >= 0)
 		free_irq(emu->irq, emu);
-	/* remove reserved page */
-	if (emu->reserved_page) {
-		snd_emu10k1_synth_free(emu,
-			(struct snd_util_memblk *)emu->reserved_page);
-		emu->reserved_page = NULL;
-	}
 	snd_util_memhdr_free(emu->memhdr);
 	if (emu->silent_page.area)
 		snd_dma_free_pages(&emu->silent_page);
@@ -1764,6 +1759,38 @@ static struct snd_emu_chip_details emu_chip_details[] = {
 	{ } /* terminator */
 };
 
+/*
+ * The chip (at least the Audigy 2 CA0102 chip, but most likely others, too)
+ * has a problem that from time to time it likes to do few DMA reads a bit
+ * beyond its normal allocation and gets very confused if these reads get
+ * blocked by a IOMMU.
+ *
+ * This behaviour has been observed for the first (reserved) page
+ * (for which it happens multiple times at every playback), often for various
+ * synth pages and sometimes for PCM playback buffers and the page table
+ * memory itself.
+ *
+ * As a workaround let's widen these DMA allocations by an extra page if we
+ * detect that the device is behind a non-passthrough IOMMU.
+ */
+static void snd_emu10k1_detect_iommu(struct snd_emu10k1 *emu)
+{
+	struct iommu_domain *domain;
+
+	emu->iommu_workaround = false;
+
+	if (!iommu_present(emu->card->dev->bus))
+		return;
+
+	domain = iommu_get_domain_for_dev(emu->card->dev);
+	if (domain && domain->type == IOMMU_DOMAIN_IDENTITY)
+		return;
+
+	dev_notice(emu->card->dev,
+		   "non-passthrough IOMMU detected, widening DMA allocations");
+	emu->iommu_workaround = true;
+}
+
 int snd_emu10k1_create(struct snd_card *card,
 		       struct pci_dev *pci,
 		       unsigned short extin_mask,
@@ -1776,6 +1803,7 @@ int snd_emu10k1_create(struct snd_card *card,
 	struct snd_emu10k1 *emu;
 	int idx, err;
 	int is_audigy;
+	size_t page_table_size;
 	unsigned int silent_page;
 	const struct snd_emu_chip_details *c;
 	static struct snd_device_ops ops = {
@@ -1873,12 +1901,13 @@ int snd_emu10k1_create(struct snd_card *card,
 
 	is_audigy = emu->audigy = c->emu10k2_chip;
 
+	snd_emu10k1_detect_iommu(emu);
+
 	/* set addressing mode */
 	emu->address_mode = is_audigy ? 0 : 1;
 	/* set the DMA transfer mask */
 	emu->dma_mask = emu->address_mode ? EMU10K1_DMA_MASK : AUDIGY_DMA_MASK;
-	if (dma_set_mask(&pci->dev, emu->dma_mask) < 0 ||
-	    dma_set_coherent_mask(&pci->dev, emu->dma_mask) < 0) {
+	if (dma_set_mask_and_coherent(&pci->dev, emu->dma_mask) < 0) {
 		dev_err(card->dev,
 			"architecture does not support PCI busmaster DMA with mask 0x%lx\n",
 			emu->dma_mask);
@@ -1900,11 +1929,17 @@ int snd_emu10k1_create(struct snd_card *card,
 	emu->port = pci_resource_start(pci, 0);
 
 	emu->max_cache_pages = max_cache_bytes >> PAGE_SHIFT;
-	if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci),
-				(emu->address_mode ? 32 : 16) * 1024, &emu->ptb_pages) < 0) {
+
+	page_table_size = sizeof(u32) * (emu->address_mode ? MAXPAGES1 :
+					 MAXPAGES0);
+	if (snd_emu10k1_alloc_pages_maybe_wider(emu, page_table_size,
+						&emu->ptb_pages) < 0) {
 		err = -ENOMEM;
 		goto error;
 	}
+	dev_dbg(card->dev, "page table address range is %.8lx:%.8lx\n",
+		(unsigned long)emu->ptb_pages.addr,
+		(unsigned long)(emu->ptb_pages.addr + emu->ptb_pages.bytes));
 
 	emu->page_ptr_table = vmalloc(emu->max_cache_pages * sizeof(void *));
 	emu->page_addr_table = vmalloc(emu->max_cache_pages *
@@ -1914,11 +1949,16 @@ int snd_emu10k1_create(struct snd_card *card,
 		goto error;
 	}
 
-	if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci),
-				EMUPAGESIZE, &emu->silent_page) < 0) {
+	if (snd_emu10k1_alloc_pages_maybe_wider(emu, EMUPAGESIZE,
+						&emu->silent_page) < 0) {
 		err = -ENOMEM;
 		goto error;
 	}
+	dev_dbg(card->dev, "silent page range is %.8lx:%.8lx\n",
+		(unsigned long)emu->silent_page.addr,
+		(unsigned long)(emu->silent_page.addr +
+				emu->silent_page.bytes));
+
 	emu->memhdr = snd_util_memhdr_new(emu->max_cache_pages * PAGE_SIZE);
 	if (emu->memhdr == NULL) {
 		err = -ENOMEM;
@@ -1993,13 +2033,8 @@ int snd_emu10k1_create(struct snd_card *card,
 		SPCS_GENERATIONSTATUS | 0x00001200 |
 		0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT;
 
-	emu->reserved_page = (struct snd_emu10k1_memblk *)
-		snd_emu10k1_synth_alloc(emu, 4096);
-	if (emu->reserved_page)
-		emu->reserved_page->map_locked = 1;
-
 	/* Clear silent pages and set up pointers */
-	memset(emu->silent_page.area, 0, PAGE_SIZE);
+	memset(emu->silent_page.area, 0, emu->silent_page.bytes);
 	silent_page = emu->silent_page.addr << emu->address_mode;
 	for (idx = 0; idx < (emu->address_mode ? MAXPAGES1 : MAXPAGES0); idx++)
 		((u32 *)emu->ptb_pages.area)[idx] = cpu_to_le32(silent_page | idx);

sound/pci/emu10k1/emupcm.c

@@ -411,12 +411,20 @@ static int snd_emu10k1_playback_hw_params(struct snd_pcm_substream *substream,
 	struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct snd_emu10k1_pcm *epcm = runtime->private_data;
+	size_t alloc_size;
 	int err;
 
 	if ((err = snd_emu10k1_pcm_channel_alloc(epcm, params_channels(hw_params))) < 0)
 		return err;
-	if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
+
+	alloc_size = params_buffer_bytes(hw_params);
+	if (emu->iommu_workaround)
+		alloc_size += EMUPAGESIZE;
+	err = snd_pcm_lib_malloc_pages(substream, alloc_size);
+	if (err < 0)
 		return err;
+	if (emu->iommu_workaround && runtime->dma_bytes >= EMUPAGESIZE)
+		runtime->dma_bytes -= EMUPAGESIZE;
 	if (err > 0) {	/* change */
 		int mapped;
 		if (epcm->memblk != NULL)

sound/pci/emu10k1/memory.c

@@ -34,7 +34,10 @@
  * aligned pages in others
  */
 #define __set_ptb_entry(emu,page,addr) \
-	(((u32 *)(emu)->ptb_pages.area)[page] = cpu_to_le32(((addr) << (emu->address_mode)) | (page)))
+	(((__le32 *)(emu)->ptb_pages.area)[page] = \
+	 cpu_to_le32(((addr) << (emu->address_mode)) | (page)))
+#define __get_ptb_entry(emu, page) \
+	(le32_to_cpu(((__le32 *)(emu)->ptb_pages.area)[page]))
 
 #define UNIT_PAGES		(PAGE_SIZE / EMUPAGESIZE)
 #define MAX_ALIGN_PAGES0		(MAXPAGES0 / UNIT_PAGES)
@@ -44,8 +47,7 @@
 /* get offset address from aligned page */
 #define aligned_page_offset(page)	((page) << PAGE_SHIFT)
 
-#if PAGE_SIZE == 4096
-/* page size == EMUPAGESIZE */
+#if PAGE_SIZE == EMUPAGESIZE && !IS_ENABLED(CONFIG_DYNAMIC_DEBUG)
 /* fill PTB entrie(s) corresponding to page with addr */
 #define set_ptb_entry(emu,page,addr)	__set_ptb_entry(emu,page,addr)
 /* fill PTB entrie(s) corresponding to page with silence pointer */
@@ -58,6 +60,8 @@ static inline void set_ptb_entry(struct snd_emu10k1 *emu, int page, dma_addr_t a
 	page *= UNIT_PAGES;
 	for (i = 0; i < UNIT_PAGES; i++, page++) {
 		__set_ptb_entry(emu, page, addr);
+		dev_dbg(emu->card->dev, "mapped page %d to entry %.8x\n", page,
+			(unsigned int)__get_ptb_entry(emu, page));
 		addr += EMUPAGESIZE;
 	}
 }
@@ -65,9 +69,12 @@ static inline void set_silent_ptb(struct snd_emu10k1 *emu, int page)
 {
 	int i;
 	page *= UNIT_PAGES;
-	for (i = 0; i < UNIT_PAGES; i++, page++)
+	for (i = 0; i < UNIT_PAGES; i++, page++) {
 		/* do not increment ptr */
 		__set_ptb_entry(emu, page, emu->silent_page.addr);
+		dev_dbg(emu->card->dev, "mapped silent page %d to entry %.8x\n",
+			page, (unsigned int)__get_ptb_entry(emu, page));
+	}
 }
 #endif /* PAGE_SIZE */
 
@@ -102,7 +109,7 @@ static void emu10k1_memblk_init(struct snd_emu10k1_memblk *blk)
  */
 static int search_empty_map_area(struct snd_emu10k1 *emu, int npages, struct list_head **nextp)
 {
-	int page = 0, found_page = -ENOMEM;
+	int page = 1, found_page = -ENOMEM;
 	int max_size = npages;
 	int size;
 	struct list_head *candidate = &emu->mapped_link_head;
@@ -147,6 +154,10 @@ static int map_memblk(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk)
 	page = search_empty_map_area(emu, blk->pages, &next);
 	if (page < 0) /* not found */
 		return page;
+	if (page == 0) {
+		dev_err(emu->card->dev, "trying to map zero (reserved) page\n");
+		return -EINVAL;
+	}
 	/* insert this block in the proper position of mapped list */
 	list_add_tail(&blk->mapped_link, next);
 	/* append this as a newest block in order list */
@@ -177,7 +188,7 @@ static int unmap_memblk(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk)
 		q = get_emu10k1_memblk(p, mapped_link);
 		start_page = q->mapped_page + q->pages;
 	} else
-		start_page = 0;
+		start_page = 1;
 	if ((p = blk->mapped_link.next) != &emu->mapped_link_head) {
 		q = get_emu10k1_memblk(p, mapped_link);
 		end_page = q->mapped_page;
@@ -366,6 +377,33 @@ int snd_emu10k1_free_pages(struct snd_emu10k1 *emu, struct snd_util_memblk *blk)
 	return snd_emu10k1_synth_free(emu, blk);
 }
 
+/*
+ * allocate DMA pages, widening the allocation if necessary
+ *
+ * See the comment above snd_emu10k1_detect_iommu() in emu10k1_main.c why
+ * this might be needed.
+ *
+ * If you modify this function check whether __synth_free_pages() also needs
+ * changes.
+ */
+int snd_emu10k1_alloc_pages_maybe_wider(struct snd_emu10k1 *emu, size_t size,
+					struct snd_dma_buffer *dmab)
+{
+	if (emu->iommu_workaround) {
+		size_t npages = (size + PAGE_SIZE - 1) / PAGE_SIZE;
+		size_t size_real = npages * PAGE_SIZE;
+
+		/*
+		 * The device has been observed to accesses up to 256 extra
+		 * bytes, but use 1k to be safe.
+		 */
+		if (size_real < size + 1024)
+			size += PAGE_SIZE;
+	}
+
+	return snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
+				   snd_dma_pci_data(emu->pci), size, dmab);
+}
 
 /*
  * memory allocation using multiple pages (for synth)
@@ -450,10 +488,27 @@ static void get_single_page_range(struct snd_util_memhdr *hdr,
 static void __synth_free_pages(struct snd_emu10k1 *emu, int first_page,
 			       int last_page)
 {
+	struct snd_dma_buffer dmab;
 	int page;
 
+	dmab.dev.type = SNDRV_DMA_TYPE_DEV;
+	dmab.dev.dev = snd_dma_pci_data(emu->pci);
+
 	for (page = first_page; page <= last_page; page++) {
-		free_page((unsigned long)emu->page_ptr_table[page]);
+		if (emu->page_ptr_table[page] == NULL)
+			continue;
+		dmab.area = emu->page_ptr_table[page];
+		dmab.addr = emu->page_addr_table[page];
+
+		/*
+		 * please keep me in sync with logic in
+		 * snd_emu10k1_alloc_pages_maybe_wider()
+		 */
+		dmab.bytes = PAGE_SIZE;
+		if (emu->iommu_workaround)
+			dmab.bytes *= 2;
+
+		snd_dma_free_pages(&dmab);
 		emu->page_addr_table[page] = 0;
 		emu->page_ptr_table[page] = NULL;
 	}
@@ -465,30 +520,30 @@ static void __synth_free_pages(struct snd_emu10k1 *emu, int first_page,
 static int synth_alloc_pages(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk)
 {
 	int page, first_page, last_page;
+	struct snd_dma_buffer dmab;
 
 	emu10k1_memblk_init(blk);
 	get_single_page_range(emu->memhdr, blk, &first_page, &last_page);
 	/* allocate kernel pages */
 	for (page = first_page; page <= last_page; page++) {
-		/* first try to allocate from <4GB zone */
-		struct page *p = alloc_page(GFP_KERNEL | GFP_DMA32 |
-					    __GFP_NOWARN);
-		if (!p || (page_to_pfn(p) & ~(emu->dma_mask >> PAGE_SHIFT))) {
-			if (p)
-				__free_page(p);
-			/* try to allocate from <16MB zone */
-			p = alloc_page(GFP_ATOMIC | GFP_DMA |
-				       __GFP_NORETRY | /* no OOM-killer */
-				       __GFP_NOWARN);
+		if (snd_emu10k1_alloc_pages_maybe_wider(emu, PAGE_SIZE,
+							&dmab) < 0)
+			goto __fail;
+		if (!is_valid_page(emu, dmab.addr)) {
+			snd_dma_free_pages(&dmab);
+			goto __fail;
 		}
-		if (!p) {
-			__synth_free_pages(emu, first_page, page - 1);
-			return -ENOMEM;
-		}
-		emu->page_addr_table[page] = page_to_phys(p);
-		emu->page_ptr_table[page] = page_address(p);
+		emu->page_addr_table[page] = dmab.addr;
+		emu->page_ptr_table[page] = dmab.area;
 	}
 	return 0;
+
+__fail:
+	/* release allocated pages */
+	last_page = page - 1;
+	__synth_free_pages(emu, first_page, last_page);
+
+	return -ENOMEM;
 }
 
 /*

sound/pci/hda/hda_beep.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Digital Beep Input Interface for HD-audio codec
  *
- * Author: Matt Ranostay <mranostay@gmail.com>
+ * Author: Matt Ranostay <matt.ranostay@konsulko.com>
  * Copyright (c) 2008 Embedded Alley Solutions Inc
- *
- *  This driver is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This driver is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */
 
 #include <linux/input.h>

sound/pci/hda/hda_beep.h

+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Digital Beep Input Interface for HD-audio codec
  *
- * Author: Matt Ranostay <mranostay@gmail.com>
+ * Author: Matt Ranostay <matt.ranostay@konsulko.com>
  * Copyright (c) 2008 Embedded Alley Solutions Inc
- *
- *  This driver is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This driver is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */
 
 #ifndef __SOUND_HDA_BEEP_H

sound/pci/hda/hda_codec.c

@@ -2702,32 +2702,6 @@ void snd_hda_codec_set_power_to_all(struct hda_codec *codec, hda_nid_t fg,
 }
 EXPORT_SYMBOL_GPL(snd_hda_codec_set_power_to_all);
 
-/*
- * wait until the state is reached, returns the current state
- */
-static unsigned int hda_sync_power_state(struct hda_codec *codec,
-					 hda_nid_t fg,
-					 unsigned int power_state)
-{
-	unsigned long end_time = jiffies + msecs_to_jiffies(500);
-	unsigned int state, actual_state;
-
-	for (;;) {
-		state = snd_hda_codec_read(codec, fg, 0,
-					   AC_VERB_GET_POWER_STATE, 0);
-		if (state & AC_PWRST_ERROR)
-			break;
-		actual_state = (state >> 4) & 0x0f;
-		if (actual_state == power_state)
-			break;
-		if (time_after_eq(jiffies, end_time))
-			break;
-		/* wait until the codec reachs to the target state */
-		msleep(1);
-	}
-	return state;
-}
-
 /**
  * snd_hda_codec_eapd_power_filter - A power filter callback for EAPD
  * @codec: the HDA codec
@@ -2790,7 +2764,7 @@ static unsigned int hda_set_power_state(struct hda_codec *codec,
 						   state);
 			snd_hda_codec_set_power_to_all(codec, fg, power_state);
 		}
-		state = hda_sync_power_state(codec, fg, power_state);
+		state = snd_hda_sync_power_state(codec, fg, power_state);
 		if (!(state & AC_PWRST_ERROR))
 			break;
 	}

sound/pci/hda/hda_intel.c

@@ -2434,6 +2434,9 @@ static const struct pci_device_id azx_ids[] = {
 	/* Cannonlake */
 	{ PCI_DEVICE(0x8086, 0x9dc8),
 	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE},
+	/* Icelake */
+	{ PCI_DEVICE(0x8086, 0x34c8),
+	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE},
 	/* Broxton-P(Apollolake) */
 	{ PCI_DEVICE(0x8086, 0x5a98),
 	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_BROXTON },

sound/pci/hda/hda_local.h

@@ -622,7 +622,11 @@ snd_hda_check_power_state(struct hda_codec *codec, hda_nid_t nid,
 {
 	return snd_hdac_check_power_state(&codec->core, nid, target_state);
 }
-
+static inline bool snd_hda_sync_power_state(struct hda_codec *codec,
+			   hda_nid_t nid, unsigned int target_state)
+{
+	return snd_hdac_sync_power_state(&codec->core, nid, target_state);
+}
 unsigned int snd_hda_codec_eapd_power_filter(struct hda_codec *codec,
 					     hda_nid_t nid,
 					     unsigned int power_state);

sound/pci/ice1712/juli.c

@@ -27,6 +27,7 @@
 #include <linux/interrupt.h>
 #include <linux/init.h>
 #include <linux/slab.h>
+#include <linux/string.h>
 #include <sound/core.h>
 #include <sound/tlv.h>
 
@@ -425,10 +426,9 @@ DECLARE_TLV_DB_SCALE(juli_master_db_scale, -6350, 50, 1);
 static struct snd_kcontrol *ctl_find(struct snd_card *card,
 				     const char *name)
 {
-	struct snd_ctl_elem_id sid;
-	memset(&sid, 0, sizeof(sid));
-	/* FIXME: strcpy is bad. */
-	strcpy(sid.name, name);
+	struct snd_ctl_elem_id sid = {0};
+
+	strlcpy(sid.name, name, sizeof(sid.name));
 	sid.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
 	return snd_ctl_find_id(card, &sid);
 }

sound/pci/ice1712/quartet.c

@@ -26,6 +26,7 @@
 #include <linux/interrupt.h>
 #include <linux/init.h>
 #include <linux/slab.h>
+#include <linux/string.h>
 #include <sound/core.h>
 #include <sound/tlv.h>
 #include <sound/info.h>
@@ -785,10 +786,9 @@ DECLARE_TLV_DB_SCALE(qtet_master_db_scale, -6350, 50, 1);
 static struct snd_kcontrol *ctl_find(struct snd_card *card,
 				     const char *name)
 {
-	struct snd_ctl_elem_id sid;
-	memset(&sid, 0, sizeof(sid));
-	/* FIXME: strcpy is bad. */
-	strcpy(sid.name, name);
+	struct snd_ctl_elem_id sid = {0};
+
+	strlcpy(sid.name, name, sizeof(sid.name));
 	sid.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
 	return snd_ctl_find_id(card, &sid);
 }

sound/usb/card.c

@@ -7,6 +7,7 @@
  *	    Alan Cox (alan@lxorguk.ukuu.org.uk)
  *	    Thomas Sailer (sailer@ife.ee.ethz.ch)
  *
+ *   Audio Class 3.0 support by Ruslan Bilovol <ruslan.bilovol@gmail.com>
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -44,6 +45,7 @@
 #include <linux/mutex.h>
 #include <linux/usb/audio.h>
 #include <linux/usb/audio-v2.h>
+#include <linux/usb/audio-v3.h>
 #include <linux/module.h>
 
 #include <sound/control.h>
@@ -281,7 +283,8 @@ static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
 		break;
 	}
 
-	case UAC_VERSION_2: {
+	case UAC_VERSION_2:
+	case UAC_VERSION_3: {
 		struct usb_interface_assoc_descriptor *assoc =
 			usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
 
@@ -301,7 +304,7 @@ static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
 		}
 
 		if (!assoc) {
-			dev_err(&dev->dev, "Audio class v2 interfaces need an interface association\n");
+			dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n");
 			return -EINVAL;
 		}
 

sound/usb/card.h

@@ -22,7 +22,7 @@ struct audioformat {
 	unsigned char endpoint;		/* endpoint */
 	unsigned char ep_attr;		/* endpoint attributes */
 	unsigned char datainterval;	/* log_2 of data packet interval */
-	unsigned char protocol;		/* UAC_VERSION_1/2 */
+	unsigned char protocol;		/* UAC_VERSION_1/2/3 */
 	unsigned int maxpacksize;	/* max. packet size */
 	unsigned int rates;		/* rate bitmasks */
 	unsigned int rate_min, rate_max;	/* min/max rates */

sound/usb/clock.h

@@ -6,7 +6,7 @@ int snd_usb_init_sample_rate(struct snd_usb_audio *chip, int iface,
 			     struct usb_host_interface *alts,
 			     struct audioformat *fmt, int rate);
 
-int snd_usb_clock_find_source(struct snd_usb_audio *chip, int entity_id,
-			     bool validate);
+int snd_usb_clock_find_source(struct snd_usb_audio *chip, int protocol,
+			     int entity_id, bool validate);
 
 #endif /* __USBAUDIO_CLOCK_H */

sound/usb/format.c

@@ -20,6 +20,7 @@
 #include <linux/usb.h>
 #include <linux/usb/audio.h>
 #include <linux/usb/audio-v2.h>
+#include <linux/usb/audio-v3.h>
 
 #include <sound/core.h>
 #include <sound/pcm.h>
@@ -39,11 +40,11 @@
  * @dev: usb device
  * @fp: audioformat record
  * @format: the format tag (wFormatTag)
- * @fmt: the format type descriptor
+ * @fmt: the format type descriptor (v1/v2) or AudioStreaming descriptor (v3)
  */
 static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
 				     struct audioformat *fp,
-				     unsigned int format, void *_fmt)
+				     u64 format, void *_fmt)
 {
 	int sample_width, sample_bytes;
 	u64 pcm_formats = 0;
@@ -54,7 +55,7 @@ static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
 		struct uac_format_type_i_discrete_descriptor *fmt = _fmt;
 		sample_width = fmt->bBitResolution;
 		sample_bytes = fmt->bSubframeSize;
-		format = 1 << format;
+		format = 1ULL << format;
 		break;
 	}
 
@@ -69,6 +70,18 @@ static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
 		format <<= 1;
 		break;
 	}
+	case UAC_VERSION_3: {
+		struct uac3_as_header_descriptor *as = _fmt;
+
+		sample_width = as->bBitResolution;
+		sample_bytes = as->bSubslotSize;
+
+		if (format & UAC3_FORMAT_TYPE_I_RAW_DATA)
+			pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
+
+		format <<= 1;
+		break;
+	}
 	}
 
 	if ((pcm_formats == 0) &&
@@ -137,7 +150,7 @@ static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
 	}
 	if (format & ~0x3f) {
 		usb_audio_info(chip,
-			 "%u:%d : unsupported format bits %#x\n",
+			 "%u:%d : unsupported format bits %#llx\n",
 			 fp->iface, fp->altsetting, format);
 	}
 
@@ -281,15 +294,16 @@ static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,
 
 /*
  * parse the format descriptor and stores the possible sample rates
- * on the audioformat table (audio class v2).
+ * on the audioformat table (audio class v2 and v3).
  */
-static int parse_audio_format_rates_v2(struct snd_usb_audio *chip,
+static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
 				       struct audioformat *fp)
 {
 	struct usb_device *dev = chip->dev;
 	unsigned char tmp[2], *data;
 	int nr_triplets, data_size, ret = 0;
-	int clock = snd_usb_clock_find_source(chip, fp->clock, false);
+	int clock = snd_usb_clock_find_source(chip, fp->protocol,
+					      fp->clock, false);
 
 	if (clock < 0) {
 		dev_err(&dev->dev,
@@ -368,13 +382,30 @@ static int parse_audio_format_rates_v2(struct snd_usb_audio *chip,
  * parse the format type I and III descriptors
  */
 static int parse_audio_format_i(struct snd_usb_audio *chip,
-				struct audioformat *fp, unsigned int format,
-				struct uac_format_type_i_continuous_descriptor *fmt)
+				struct audioformat *fp, u64 format,
+				void *_fmt)
 {
 	snd_pcm_format_t pcm_format;
+	unsigned int fmt_type;
 	int ret;
 
-	if (fmt->bFormatType == UAC_FORMAT_TYPE_III) {
+	switch (fp->protocol) {
+	default:
+	case UAC_VERSION_1:
+	case UAC_VERSION_2: {
+		struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
+
+		fmt_type = fmt->bFormatType;
+		break;
+	}
+	case UAC_VERSION_3: {
+		/* fp->fmt_type is already set in this case */
+		fmt_type = fp->fmt_type;
+		break;
+	}
+	}
+
+	if (fmt_type == UAC_FORMAT_TYPE_III) {
 		/* FIXME: the format type is really IECxxx
 		 *        but we give normal PCM format to get the existing
 		 *        apps working...
@@ -393,7 +424,7 @@ static int parse_audio_format_i(struct snd_usb_audio *chip,
 		}
 		fp->formats = pcm_format_to_bits(pcm_format);
 	} else {
-		fp->formats = parse_audio_format_i_type(chip, fp, format, fmt);
+		fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);
 		if (!fp->formats)
 			return -EINVAL;
 	}
@@ -405,15 +436,20 @@ static int parse_audio_format_i(struct snd_usb_audio *chip,
 	 */
 	switch (fp->protocol) {
 	default:
-	case UAC_VERSION_1:
+	case UAC_VERSION_1: {
+		struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
+
 		fp->channels = fmt->bNrChannels;
 		ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
 		break;
+	}
 	case UAC_VERSION_2:
+	case UAC_VERSION_3: {
 		/* fp->channels is already set in this case */
-		ret = parse_audio_format_rates_v2(chip, fp);
+		ret = parse_audio_format_rates_v2v3(chip, fp);
 		break;
 	}
+	}
 
 	if (fp->channels < 1) {
 		usb_audio_err(chip,
@@ -430,7 +466,7 @@ static int parse_audio_format_i(struct snd_usb_audio *chip,
  */
 static int parse_audio_format_ii(struct snd_usb_audio *chip,
 				 struct audioformat *fp,
-				 int format, void *_fmt)
+				 u64 format, void *_fmt)
 {
 	int brate, framesize, ret;
 
@@ -445,7 +481,7 @@ static int parse_audio_format_ii(struct snd_usb_audio *chip,
 		break;
 	default:
 		usb_audio_info(chip,
-			 "%u:%d : unknown format tag %#x is detected.  processed as MPEG.\n",
+			 "%u:%d : unknown format tag %#llx is detected.  processed as MPEG.\n",
 			 fp->iface, fp->altsetting, format);
 		fp->formats = SNDRV_PCM_FMTBIT_MPEG;
 		break;
@@ -470,7 +506,7 @@ static int parse_audio_format_ii(struct snd_usb_audio *chip,
 		framesize = le16_to_cpu(fmt->wSamplesPerFrame);
 		usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
 		fp->frame_size = framesize;
-		ret = parse_audio_format_rates_v2(chip, fp);
+		ret = parse_audio_format_rates_v2v3(chip, fp);
 		break;
 	}
 	}
@@ -479,7 +515,7 @@ static int parse_audio_format_ii(struct snd_usb_audio *chip,
 }
 
 int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
-			       struct audioformat *fp, unsigned int format,
+			       struct audioformat *fp, u64 format,
 			       struct uac_format_type_i_continuous_descriptor *fmt,
 			       int stream)
 {
@@ -520,3 +556,26 @@ int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
 	return 0;
 }
 
+int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
+			       struct audioformat *fp,
+			       struct uac3_as_header_descriptor *as,
+			       int stream)
+{
+	u64 format = le64_to_cpu(as->bmFormats);
+	int err;
+
+	/*
+	 * Type I format bits are D0..D6
+	 * This test works because type IV is not supported
+	 */
+	if (format & 0x7f)
+		fp->fmt_type = UAC_FORMAT_TYPE_I;
+	else
+		fp->fmt_type = UAC_FORMAT_TYPE_III;
+
+	err = parse_audio_format_i(chip, fp, format, as);
+	if (err < 0)
+		return err;
+
+	return 0;
+}

sound/usb/format.h

@@ -3,8 +3,12 @@
 #define __USBAUDIO_FORMAT_H
 
 int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
-			       struct audioformat *fp, unsigned int format,
+			       struct audioformat *fp, u64 format,
 			       struct uac_format_type_i_continuous_descriptor *fmt,
 			       int stream);
 
+int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
+			       struct audioformat *fp,
+			       struct uac3_as_header_descriptor *as,
+			       int stream);
 #endif /*  __USBAUDIO_FORMAT_H */

sound/usb/quirks.c

@@ -1149,27 +1149,17 @@ bool snd_usb_get_sample_rate_quirk(struct snd_usb_audio *chip)
 	return false;
 }
 
-/* Marantz/Denon USB DACs need a vendor cmd to switch
+/* ITF-USB DSD based DACs need a vendor cmd to switch
  * between PCM and native DSD mode
  */
-static bool is_marantz_denon_dac(unsigned int id)
+static bool is_itf_usb_dsd_dac(unsigned int id)
 {
 	switch (id) {
 	case USB_ID(0x154e, 0x1003): /* Denon DA-300USB */
 	case USB_ID(0x154e, 0x3005): /* Marantz HD-DAC1 */
 	case USB_ID(0x154e, 0x3006): /* Marantz SA-14S1 */
-		return true;
-	}
-	return false;
-}
-
-/* TEAC UD-501/UD-503/NT-503 USB DACs need a vendor cmd to switch
- * between PCM/DOP and native DSD mode
- */
-static bool is_teac_dsd_dac(unsigned int id)
-{
-	switch (id) {
-	case USB_ID(0x0644, 0x8043): /* TEAC UD-501/UD-503/NT-503 */
+	case USB_ID(0x1852, 0x5065): /* Luxman DA-06 */
+	case USB_ID(0x0644, 0x8043): /* TEAC UD-501/UD-501V2/UD-503/NT-503 */
 	case USB_ID(0x0644, 0x8044): /* Esoteric D-05X */
 	case USB_ID(0x0644, 0x804a): /* TEAC UD-301 */
 		return true;
@@ -1183,7 +1173,7 @@ int snd_usb_select_mode_quirk(struct snd_usb_substream *subs,
 	struct usb_device *dev = subs->dev;
 	int err;
 
-	if (is_marantz_denon_dac(subs->stream->chip->usb_id)) {
+	if (is_itf_usb_dsd_dac(subs->stream->chip->usb_id)) {
 		/* First switch to alt set 0, otherwise the mode switch cmd
 		 * will not be accepted by the DAC
 		 */
@@ -1193,37 +1183,26 @@ int snd_usb_select_mode_quirk(struct snd_usb_substream *subs,
 
 		mdelay(20); /* Delay needed after setting the interface */
 
-		switch (fmt->altsetting) {
-		case 2: /* DSD mode requested */
-		case 1: /* PCM mode requested */
-			err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0,
-					      USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
-					      fmt->altsetting - 1, 1, NULL, 0);
-			if (err < 0)
-				return err;
-			break;
-		}
-		mdelay(20);
-	} else if (is_teac_dsd_dac(subs->stream->chip->usb_id)) {
 		/* Vendor mode switch cmd is required. */
-		switch (fmt->altsetting) {
-		case 3: /* DSD mode (DSD_U32) requested */
+		if (fmt->formats & SNDRV_PCM_FMTBIT_DSD_U32_BE) {
+			/* DSD mode (DSD_U32) requested */
 			err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0,
 					      USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
 					      1, 1, NULL, 0);
 			if (err < 0)
 				return err;
-			break;
 
-		case 2: /* PCM or DOP mode (S32) requested */
-		case 1: /* PCM mode (S16) requested */
+		} else {
+			/* PCM or DOP mode (S32) requested */
+			/* PCM mode (S16) requested */
 			err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0,
 					      USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
 					      0, 1, NULL, 0);
 			if (err < 0)
 				return err;
-			break;
+
 		}
+		mdelay(20);
 	}
 	return 0;
 }
@@ -1300,10 +1279,10 @@ void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
 	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
 		mdelay(20);
 
-	/* Marantz/Denon devices with USB DAC functionality need a delay
+	/* ITF-USB DSD based DACs functionality need a delay
 	 * after each class compliant request
 	 */
-	if (is_marantz_denon_dac(chip->usb_id)
+	if (is_itf_usb_dsd_dac(chip->usb_id)
 	    && (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
 		mdelay(20);
 
@@ -1329,6 +1308,8 @@ u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
 					struct audioformat *fp,
 					unsigned int sample_bytes)
 {
+	struct usb_interface *iface;
+
 	/* Playback Designs */
 	if (USB_ID_VENDOR(chip->usb_id) == 0x23ba) {
 		switch (fp->altsetting) {
@@ -1390,17 +1371,52 @@ u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
 		break;
 	}
 
-	/* Denon/Marantz devices with USB DAC functionality */
-	if (is_marantz_denon_dac(chip->usb_id)) {
-		if (fp->altsetting == 2)
-			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
-	}
+	/* ITF-USB DSD based DACs */
+	if (is_itf_usb_dsd_dac(chip->usb_id)) {
+		iface = usb_ifnum_to_if(chip->dev, fp->iface);
 
-	/* TEAC devices with USB DAC functionality */
-	if (is_teac_dsd_dac(chip->usb_id)) {
-		if (fp->altsetting == 3)
+		/* Altsetting 2 support native DSD if the num of altsets is
+		 * three (0-2),
+		 * Altsetting 3 support native DSD if the num of altsets is
+		 * four (0-3).
+		 */
+		if (fp->altsetting == iface->num_altsetting - 1)
 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
 	}
 
 	return 0;
 }
+
+void snd_usb_audioformat_attributes_quirk(struct snd_usb_audio *chip,
+					  struct audioformat *fp,
+					  int stream)
+{
+	switch (chip->usb_id) {
+	case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
+		/* Optoplay sets the sample rate attribute although
+		 * it seems not supporting it in fact.
+		 */
+		fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE;
+		break;
+	case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
+	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
+		/* doesn't set the sample rate attribute, but supports it */
+		fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE;
+		break;
+	case USB_ID(0x0763, 0x2001):  /* M-Audio Quattro USB */
+	case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
+	case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
+	case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
+					an older model 77d:223) */
+	/*
+	 * plantronics headset and Griffin iMic have set adaptive-in
+	 * although it's really not...
+	 */
+		fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE;
+		if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+			fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE;
+		else
+			fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC;
+		break;
+	}
+}

sound/usb/quirks.h

@@ -42,4 +42,8 @@ u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
 					struct audioformat *fp,
 					unsigned int sample_bytes);
 
+void snd_usb_audioformat_attributes_quirk(struct snd_usb_audio *chip,
+					  struct audioformat *fp,
+					  int stream);
+
 #endif /* __USBAUDIO_QUIRKS_H */