diff mbox series

[v3,4/6] ALSA: emu10k1: add support for 2x/4x word clocks in E-MU D.A.S. mode

Message ID 20230717102036.404260-5-oswald.buddenhagen@gmx.de
State Superseded
Headers show
Series ALSA: emu10k1: add support for high-bitrate modes of E-MU cards | expand

Commit Message

Oswald Buddenhagen July 17, 2023, 10:20 a.m. UTC
This lays the groundwork for supporting 88.2/96/176.4/192 kHz rates
without actually doing so yet - we simply multi-feed the same samples
on playback, and throw away the excess ones on capture. Input-to-output
monitoring does actually use the full sample rate, though.

Due to hardware constraints, changing the clock multiplier (CM) changes
the available audio ports and the number of available channels. This has
an impact on the channel routing mixer controls. One way to deal with
this would be presenting a union of all possibilities, and simply
ignoring currently inapplicable settings. However, this would be a
terrible user experience, and go against the spirit of prior patches
aimed at decluttering the mixer. Therefore, we do dynamic
reconfiguration (DR) of the mixer in response to changing the CM.

DR is somewhat controversial, as it has the potential to crash poorly
programmed applications. But that in itself isn't a very convincing
argument against it, as by that logic we'd have to ban all hot-plugging.
Such crashes would also not really qualify as regressions, as the D.A.S.
mode is a new opt-in feature, and therefore no previously stable setups
would be impacted. Also, pendantically, the driver already had DR via
SNDRV_EMU10K1_IOCTL_CODE_POKE. A somewhat valid concern is that changing
mixer settings is a non-privileged operation and therefore potential
crashes could be exploited for a somewhat more impactful nuisance attack
on another user than messing with the mixer per se. However, systemd &
co. limit device access to the user currently logged in on the seat
owning the device.

There is a specific concern about doing DR in response to changing a
mixer control's value, as an application may legitimately react to DR by
updating all mixer settings in turn. However, that update should write
the same value to the clock multiplier, thus terminating the recursion.

One may limit DR to merely disabling inapplicable controls, in the hope
that this would be better handled than completely tearing down and
re-creating controls as we do. However, there is no guarantee for that.
And because it is impossible to disable particular enum values within a
control, it would be necessary to have three complete sets of
per-channel controls. This would yield an extremely cluttered and
confusing UI if the application (reasonably) chose to merely visually
disable inactive controls rather than hiding them.

We do the DR synchronously from within snd_emu1010_clock_shift_put().
This was enabled by commit 5bbb1ab5bd ("control: use counting semaphore
as write lock for ELEM_WRITE operation"); we merely need to make
add_ctls() use snd_ctl_add_locked() instead of snd_ctl_add(), so it
doesn't deadlock. That also affects the initial creation of the
controls, which is OK, as that is done before the card is registered,
where no concurrent access can occur.

It would be possible to do the DR in a tasklet after the ioctl finishes.
However, it is not obvious what actual problem that would solve, and the
added asynchronicity would significantly complicate matters, esp. wrt.
the batch updates expected during mixer state restoration.

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
---
v3:
- locking adjustments

v2:
- expanded commit message
---
 include/sound/emu10k1.h          |   3 +
 sound/pci/emu10k1/emu10k1_main.c |  13 +-
 sound/pci/emu10k1/emumixer.c     | 649 ++++++++++++++++++++++++++++---
 sound/pci/emu10k1/emupcm.c       |  41 +-
 sound/pci/emu10k1/io.c           |  30 +-
 5 files changed, 666 insertions(+), 70 deletions(-)
diff mbox series

Patch

diff --git a/include/sound/emu10k1.h b/include/sound/emu10k1.h
index 29cdae401e12..aafa6ad2c5a0 100644
--- a/include/sound/emu10k1.h
+++ b/include/sound/emu10k1.h
@@ -1682,6 +1682,8 @@  struct snd_emu1010 {
 	unsigned int word_clock;  /* Cached effective value */
 	unsigned int clock_source;
 	unsigned int clock_fallback;
+	unsigned int clock_shift;  /* EMU_HANA_WCLOCK_MULT_MASK >> 3 */
+	unsigned int clock_users;
 	unsigned int optical_in; /* 0:SPDIF, 1:ADAT */
 	unsigned int optical_out; /* 0:SPDIF, 1:ADAT */
 	struct work_struct firmware_work;
@@ -1763,6 +1765,7 @@  struct snd_emu10k1 {
 	struct snd_kcontrol *ctl_efx_send_volume;
 	struct snd_kcontrol *ctl_efx_attn;
 	struct snd_kcontrol *ctl_clock_source;
+	struct snd_kcontrol *ctl_clock_shift;
 
 	void (*hwvol_interrupt)(struct snd_emu10k1 *emu, unsigned int status);
 	void (*capture_interrupt)(struct snd_emu10k1 *emu, unsigned int status);
diff --git a/sound/pci/emu10k1/emu10k1_main.c b/sound/pci/emu10k1/emu10k1_main.c
index b50bb6a55a6d..0b660a7d0ef7 100644
--- a/sound/pci/emu10k1/emu10k1_main.c
+++ b/sound/pci/emu10k1/emu10k1_main.c
@@ -798,7 +798,8 @@  static void emu1010_clock_work(struct work_struct *work)
 	spin_lock_irq(&emu->reg_lock);
 	// This is the only thing that can actually happen.
 	emu->emu1010.clock_source = emu->emu1010.clock_fallback;
-	emu->emu1010.wclock = 1 - emu->emu1010.clock_source;
+	emu->emu1010.wclock = (emu->emu1010.wclock & ~EMU_HANA_WCLOCK_SRC_MASK) |
+				(1 - emu->emu1010.clock_source);
 	snd_emu1010_update_clock(emu);
 	spin_unlock_irq(&emu->reg_lock);
 	snd_ctl_build_ioff(&id, emu->ctl_clock_source, 0);
@@ -822,14 +823,6 @@  static void emu1010_interrupt(struct snd_emu10k1 *emu)
 		schedule_work(&emu->emu1010.clock_work);
 }
 
-/*
- * Current status of the driver:
- * ----------------------------
- * 	* only 44.1/48kHz supported (the MS Win driver supports up to 192 kHz)
- * 	* PCM device nb. 2:
- *		16 x 16-bit playback - snd_emu10k1_fx8010_playback_ops
- * 		16 x 32-bit capture - snd_emu10k1_capture_efx_ops
- */
 static int snd_emu10k1_emu1010_init(struct snd_emu10k1 *emu)
 {
 	u32 tmp, tmp2, reg;
@@ -924,12 +917,12 @@  static int snd_emu10k1_emu1010_init(struct snd_emu10k1 *emu)
 
 	emu->emu1010.clock_source = 1;  /* 48000 */
 	emu->emu1010.clock_fallback = 1;  /* 48000 */
+	emu->emu1010.clock_shift = 0;  /* 1x */
 	/* Default WCLK set to 48kHz. */
 	snd_emu1010_fpga_write(emu, EMU_HANA_DEFCLOCK, EMU_HANA_DEFCLOCK_48K);
 	/* Word Clock source, Internal 48kHz x1 */
 	emu->emu1010.wclock = EMU_HANA_WCLOCK_INT_48K;
 	snd_emu1010_fpga_write(emu, EMU_HANA_WCLOCK, EMU_HANA_WCLOCK_INT_48K);
-	/* snd_emu1010_fpga_write(emu, EMU_HANA_WCLOCK, EMU_HANA_WCLOCK_INT_48K | EMU_HANA_WCLOCK_4X); */
 	snd_emu1010_update_clock(emu);
 
 	// The routes are all set to EMU_SRC_SILENCE due to the reset,
diff --git a/sound/pci/emu10k1/emumixer.c b/sound/pci/emu10k1/emumixer.c
index 4ab00f65e48d..88dd156173cb 100644
--- a/sound/pci/emu10k1/emumixer.c
+++ b/sound/pci/emu10k1/emumixer.c
@@ -33,7 +33,7 @@  static int add_ctls(struct snd_emu10k1 *emu, const struct snd_kcontrol_new *tpl,
 	for (unsigned i = 0; i < nctls; i++) {
 		kctl.name = ctls[i];
 		kctl.private_value = i;
-		err = snd_ctl_add(emu->card, snd_ctl_new1(&kctl, emu));
+		err = snd_ctl_add_locked(emu->card, snd_ctl_new1(&kctl, emu));
 		if (err < 0)
 			return err;
 	}
@@ -81,15 +81,35 @@  static int snd_emu10k1_spdif_get_mask(struct snd_kcontrol *kcontrol,
 	pfx "ADAT 0" sfx, pfx "ADAT 1" sfx, pfx "ADAT 2" sfx, pfx "ADAT 3" sfx, \
 	pfx "ADAT 4" sfx, pfx "ADAT 5" sfx, pfx "ADAT 6" sfx, pfx "ADAT 7" sfx
 
+#define ADAT_2x_PS(pfx, sfx) \
+	pfx "ADAT 0-1" sfx, pfx "ADAT 2-3" sfx, pfx "ADAT 4-5" sfx, pfx "ADAT 6-7" sfx
+
+#define ADAT_4x_PS(pfx, sfx) \
+	pfx "ADAT 0-3" sfx, pfx "ADAT 4-7" sfx
+
 #define PAIR_REGS(base, one, two) \
 	base ## one ## 1, \
 	base ## two ## 1
+#define PAIR_2x_REGS(base, one, two) \
+	{ base ## one ## 1, base ## one ## 2 }, \
+	{ base ## two ## 1, base ## two ## 2 }
+#define PAIR_4x_REGS(base, one, two) \
+	{ base ## one ## 1, base ## one ## 2, base ## one ## 3, base ## one ## 4 }, \
+	{ base ## two ## 1, base ## two ## 2, base ## two ## 3, base ## two ## 4 }
 
 #define LR_REGS(base) PAIR_REGS(base, _LEFT, _RIGHT)
+#define LR_2x_REGS(base) PAIR_2x_REGS(base, _LEFT, _RIGHT)
+#define LR_4x_REGS(base) PAIR_4x_REGS(base, _LEFT, _RIGHT)
 
 #define ADAT_REGS(base) \
 	base+0, base+1, base+2, base+3, base+4, base+5, base+6, base+7
 
+#define ADAT_2x_REGS(base) \
+	{ base+0, base+1 }, { base+2, base+3 }, { base+4, base+5 }, { base+6, base+7 }
+
+#define ADAT_4x_REGS(base) \
+	{ base+0, base+1, base+2, base+3 }, { base+4, base+5, base+6, base+7 }
+
 /*
  * List of data sources available for each destination
  */
@@ -106,9 +126,16 @@  static int snd_emu10k1_spdif_get_mask(struct snd_kcontrol *kcontrol,
 	"PbChn 08", "PbChn 09", "PbChn 10", "PbChn 11", \
 	"PbChn 12", "PbChn 13", "PbChn 14", "PbChn 15"
 
+#define PB_4x_TEXTS PB_TEXTS  // Only 1x playback for now
+
 #define PAIR_TEXTS(base, one, two) PAIR_PS(base, one, two, "")
 #define LR_TEXTS(base) LR_PS(base, "")
 #define ADAT_TEXTS(pfx) ADAT_PS(pfx, "")
+#define ADAT_2x_TEXTS(pfx) ADAT_2x_PS(pfx, "")
+#define ADAT_4x_TEXTS(pfx) ADAT_4x_PS(pfx, "")
+
+#define SRC_SILENCE_2x { EMU_SRC_SILENCE, EMU_SRC_SILENCE }
+#define SRC_SILENCE_4x { EMU_SRC_SILENCE, EMU_SRC_SILENCE, EMU_SRC_SILENCE, EMU_SRC_SILENCE }
 
 #define EMU32_SRC_REGS \
 	EMU_SRC_ALICE_EMU32A, \
@@ -144,6 +171,27 @@  static int snd_emu10k1_spdif_get_mask(struct snd_kcontrol *kcontrol,
 	EMU_SRC_ALICE_EMU32B+0xe, \
 	EMU_SRC_ALICE_EMU32B+0xf
 
+// Only 1x playback for now
+#define EMU32_2x_SRC_REGS \
+	{ EMU_SRC_ALICE_EMU32A }, \
+	{ EMU_SRC_ALICE_EMU32A+1 }, \
+	{ EMU_SRC_ALICE_EMU32A+2 }, \
+	{ EMU_SRC_ALICE_EMU32A+3 }, \
+	{ EMU_SRC_ALICE_EMU32A+4 }, \
+	{ EMU_SRC_ALICE_EMU32A+5 }, \
+	{ EMU_SRC_ALICE_EMU32A+6 }, \
+	{ EMU_SRC_ALICE_EMU32A+7 }, \
+	{ EMU_SRC_ALICE_EMU32A+8 }, \
+	{ EMU_SRC_ALICE_EMU32A+9 }, \
+	{ EMU_SRC_ALICE_EMU32A+0xa }, \
+	{ EMU_SRC_ALICE_EMU32A+0xb }, \
+	{ EMU_SRC_ALICE_EMU32A+0xc }, \
+	{ EMU_SRC_ALICE_EMU32A+0xd }, \
+	{ EMU_SRC_ALICE_EMU32A+0xe }, \
+	{ EMU_SRC_ALICE_EMU32A+0xf }
+
+#define EMU32_4x_SRC_REGS EMU32_2x_SRC_REGS
+
 /* 1010 rev1 */
 
 #define EMU1010_COMMON_TEXTS \
@@ -179,6 +227,54 @@  static const unsigned short emu1010_src_regs[] = {
 };
 static_assert(ARRAY_SIZE(emu1010_src_regs) == ARRAY_SIZE(emu1010_src_texts));
 
+static const char * const emu1010_2x_src_texts[] = {
+	"Silence",
+	PAIR_TEXTS("Dock Mic", "A", "B"),
+	LR_TEXTS("Dock ADC1"),
+	LR_TEXTS("Dock ADC2"),
+	LR_TEXTS("Dock ADC3"),
+	LR_TEXTS("0202 ADC"),
+	LR_TEXTS("1010 SPDIF"),
+	ADAT_2x_TEXTS("1010 "),
+	PB_TEXTS,
+};
+
+static const unsigned short emu1010_2x_src_regs[][2] = {
+	SRC_SILENCE_2x,
+	PAIR_2x_REGS(EMU_SRC_DOCK_MIC, _A, _B),
+	LR_2x_REGS(EMU_SRC_DOCK_ADC1),
+	LR_2x_REGS(EMU_SRC_DOCK_ADC2),
+	LR_2x_REGS(EMU_SRC_DOCK_ADC3),
+	LR_2x_REGS(EMU_SRC_HAMOA_ADC),
+	LR_2x_REGS(EMU_SRC_HANA_SPDIF),
+	ADAT_2x_REGS(EMU_SRC_HANA_ADAT),
+	EMU32_2x_SRC_REGS,
+};
+static_assert(ARRAY_SIZE(emu1010_2x_src_regs) == ARRAY_SIZE(emu1010_2x_src_texts));
+
+static const char * const emu1010_4x_src_texts[] = {
+	"Silence",
+	PAIR_TEXTS("Dock Mic", "A", "B"),
+	LR_TEXTS("Dock ADC1"),
+	LR_TEXTS("Dock ADC2"),
+	LR_TEXTS("Dock ADC3"),
+	LR_TEXTS("0202 ADC"),
+	ADAT_4x_TEXTS("1010 "),
+	PB_4x_TEXTS,
+};
+
+static const unsigned short emu1010_4x_src_regs[][4] = {
+	SRC_SILENCE_4x,
+	PAIR_4x_REGS(EMU_SRC_DOCK_MIC, _A, _B),
+	LR_4x_REGS(EMU_SRC_DOCK_ADC1),
+	LR_4x_REGS(EMU_SRC_DOCK_ADC2),
+	LR_4x_REGS(EMU_SRC_DOCK_ADC3),
+	LR_4x_REGS(EMU_SRC_HAMOA_ADC),
+	ADAT_4x_REGS(EMU_SRC_HANA_ADAT),
+	EMU32_4x_SRC_REGS,
+};
+static_assert(ARRAY_SIZE(emu1010_4x_src_regs) == ARRAY_SIZE(emu1010_4x_src_texts));
+
 /* 1010 rev2 */
 
 #define EMU1010b_COMMON_TEXTS \
@@ -216,6 +312,58 @@  static const unsigned short emu1010b_src_regs[] = {
 };
 static_assert(ARRAY_SIZE(emu1010b_src_regs) == ARRAY_SIZE(emu1010b_src_texts));
 
+static const char * const emu1010b_2x_src_texts[] = {
+	"Silence",
+	PAIR_TEXTS("Dock Mic", "A", "B"),
+	LR_TEXTS("Dock ADC1"),
+	LR_TEXTS("Dock ADC2"),
+	LR_TEXTS("0202 ADC"),
+	LR_TEXTS("Dock SPDIF"),
+	LR_TEXTS("1010 SPDIF"),
+	ADAT_2x_TEXTS("Dock "),
+	ADAT_2x_TEXTS("1010 "),
+	PB_TEXTS,
+};
+
+static const unsigned short emu1010b_2x_src_regs[][2] = {
+	SRC_SILENCE_2x,
+	PAIR_2x_REGS(EMU_SRC_DOCK_MIC, _A, _B),
+	LR_2x_REGS(EMU_SRC_DOCK_ADC1),
+	LR_2x_REGS(EMU_SRC_DOCK_ADC2),
+	LR_2x_REGS(EMU_SRC_HAMOA_ADC),
+	LR_2x_REGS(EMU_SRC_MDOCK_SPDIF),
+	LR_2x_REGS(EMU_SRC_HANA_SPDIF),
+	ADAT_2x_REGS(EMU_SRC_MDOCK_ADAT),
+	ADAT_2x_REGS(EMU_SRC_HANA_ADAT),
+	EMU32_2x_SRC_REGS,
+};
+static_assert(ARRAY_SIZE(emu1010b_2x_src_regs) == ARRAY_SIZE(emu1010b_2x_src_texts));
+
+static const char * const emu1010b_4x_src_texts[] = {
+	"Silence",
+	PAIR_TEXTS("Dock Mic", "A", "B"),
+	LR_TEXTS("Dock ADC1"),
+	LR_TEXTS("Dock ADC2"),
+	LR_TEXTS("0202 ADC"),
+	LR_TEXTS("1010 SPDIF"),
+	ADAT_4x_TEXTS("Dock "),
+	ADAT_4x_TEXTS("1010 "),
+	PB_4x_TEXTS,
+};
+
+static const unsigned short emu1010b_4x_src_regs[][4] = {
+	SRC_SILENCE_4x,
+	PAIR_4x_REGS(EMU_SRC_DOCK_MIC, _A, _B),
+	LR_4x_REGS(EMU_SRC_DOCK_ADC1),
+	LR_4x_REGS(EMU_SRC_DOCK_ADC2),
+	LR_4x_REGS(EMU_SRC_HAMOA_ADC),
+	LR_4x_REGS(EMU_SRC_HANA_SPDIF),
+	ADAT_4x_REGS(EMU_SRC_MDOCK_ADAT),
+	ADAT_4x_REGS(EMU_SRC_HANA_ADAT),
+	EMU32_4x_SRC_REGS,
+};
+static_assert(ARRAY_SIZE(emu1010b_4x_src_regs) == ARRAY_SIZE(emu1010b_4x_src_texts));
+
 /* 1616(m) cardbus */
 
 #define EMU1616_COMMON_TEXTS \
@@ -247,6 +395,46 @@  static const unsigned short emu1616_src_regs[] = {
 };
 static_assert(ARRAY_SIZE(emu1616_src_regs) == ARRAY_SIZE(emu1616_src_texts));
 
+static const char * const emu1616_2x_src_texts[] = {
+	"Silence",
+	PAIR_TEXTS("Mic", "A", "B"),
+	LR_TEXTS("ADC1"),
+	LR_TEXTS("ADC2"),
+	LR_TEXTS("SPDIF"),
+	ADAT_2x_TEXTS(""),
+	PB_TEXTS,
+};
+
+static const unsigned short emu1616_2x_src_regs[][2] = {
+	SRC_SILENCE_2x,
+	PAIR_2x_REGS(EMU_SRC_DOCK_MIC, _A, _B),
+	LR_2x_REGS(EMU_SRC_DOCK_ADC1),
+	LR_2x_REGS(EMU_SRC_DOCK_ADC2),
+	LR_2x_REGS(EMU_SRC_MDOCK_SPDIF),
+	ADAT_2x_REGS(EMU_SRC_MDOCK_ADAT),
+	EMU32_2x_SRC_REGS,
+};
+static_assert(ARRAY_SIZE(emu1616_2x_src_regs) == ARRAY_SIZE(emu1616_2x_src_texts));
+
+static const char * const emu1616_4x_src_texts[] = {
+	"Silence",
+	PAIR_TEXTS("Mic", "A", "B"),
+	LR_TEXTS("ADC1"),
+	LR_TEXTS("ADC2"),
+	ADAT_4x_TEXTS(""),
+	PB_4x_TEXTS,
+};
+
+static const unsigned short emu1616_4x_src_regs[][4] = {
+	SRC_SILENCE_4x,
+	PAIR_4x_REGS(EMU_SRC_DOCK_MIC, _A, _B),
+	LR_4x_REGS(EMU_SRC_DOCK_ADC1),
+	LR_4x_REGS(EMU_SRC_DOCK_ADC2),
+	ADAT_4x_REGS(EMU_SRC_MDOCK_ADAT),
+	EMU32_4x_SRC_REGS,
+};
+static_assert(ARRAY_SIZE(emu1616_4x_src_regs) == ARRAY_SIZE(emu1616_4x_src_texts));
+
 /* 0404 rev1 & rev2 */
 
 #define EMU0404_COMMON_TEXTS \
@@ -272,13 +460,36 @@  static const unsigned short emu0404_src_regs[] = {
 };
 static_assert(ARRAY_SIZE(emu0404_src_regs) == ARRAY_SIZE(emu0404_src_texts));
 
+static const unsigned short emu0404_2x_src_regs[][2] = {
+	SRC_SILENCE_2x,
+	LR_2x_REGS(EMU_SRC_HAMOA_ADC),
+	LR_2x_REGS(EMU_SRC_HANA_SPDIF),
+	EMU32_2x_SRC_REGS,
+};
+static_assert(ARRAY_SIZE(emu0404_2x_src_regs) == ARRAY_SIZE(emu0404_das_src_texts));
+
+static const char * const emu0404_4x_src_texts[] = {
+	"Silence",
+	LR_TEXTS("ADC"),
+	PB_4x_TEXTS,
+};
+
+static const unsigned short emu0404_4x_src_regs[][4] = {
+	SRC_SILENCE_4x,
+	LR_4x_REGS(EMU_SRC_HAMOA_ADC),
+	EMU32_4x_SRC_REGS,
+};
+static_assert(ARRAY_SIZE(emu0404_4x_src_regs) == ARRAY_SIZE(emu0404_4x_src_texts));
+
 /*
  * Data destinations - physical EMU outputs.
  * Each destination has an enum mixer control to choose a data source
  */
 
 #define LR_CTLS(base) LR_PS(base, " Playback Enum")
 #define ADAT_CTLS(pfx) ADAT_PS(pfx, " Playback Enum")
+#define ADAT_2x_CTLS(pfx) ADAT_2x_PS(pfx, " Playback Enum")
+#define ADAT_4x_CTLS(pfx) ADAT_4x_PS(pfx, " Playback Enum")
 
 /* 1010 rev1 */
 
@@ -322,6 +533,52 @@  static const unsigned short emu1010_output_dflt[] = {
 };
 static_assert(ARRAY_SIZE(emu1010_output_dflt) == ARRAY_SIZE(emu1010_output_dst));
 
+static const char * const emu1010_2x_output_texts[] = {
+	LR_CTLS("Dock DAC1"),
+	LR_CTLS("Dock DAC2"),
+	LR_CTLS("Dock DAC3"),
+	LR_CTLS("Dock DAC4"),
+	LR_CTLS("Dock Phones"),
+	LR_CTLS("Dock SPDIF"),
+	LR_CTLS("0202 DAC"),
+	LR_CTLS("1010 SPDIF"),
+	ADAT_2x_CTLS("1010 "),
+};
+static_assert(ARRAY_SIZE(emu1010_2x_output_texts) <= NUM_OUTPUT_DESTS);
+
+static const unsigned short emu1010_2x_output_dst[][2] = {
+	LR_2x_REGS(EMU_DST_DOCK_DAC1),
+	LR_2x_REGS(EMU_DST_DOCK_DAC2),
+	LR_2x_REGS(EMU_DST_DOCK_DAC3),
+	LR_2x_REGS(EMU_DST_DOCK_DAC4),
+	LR_2x_REGS(EMU_DST_DOCK_PHONES),
+	LR_2x_REGS(EMU_DST_DOCK_SPDIF),
+	LR_2x_REGS(EMU_DST_HAMOA_DAC),
+	LR_2x_REGS(EMU_DST_HANA_SPDIF),
+	ADAT_2x_REGS(EMU_DST_HANA_ADAT),
+};
+static_assert(ARRAY_SIZE(emu1010_2x_output_dst) == ARRAY_SIZE(emu1010_2x_output_texts));
+
+static const char * const emu1010_4x_output_texts[] = {
+	LR_CTLS("Dock DAC1"),
+	LR_CTLS("Dock DAC2"),
+	LR_CTLS("Dock DAC3"),
+	LR_CTLS("Dock DAC4"),
+	LR_CTLS("0202 DAC"),
+	ADAT_4x_CTLS("1010 "),
+};
+static_assert(ARRAY_SIZE(emu1010_4x_output_texts) <= NUM_OUTPUT_DESTS);
+
+static const unsigned short emu1010_4x_output_dst[][4] = {
+	LR_4x_REGS(EMU_DST_DOCK_DAC1),
+	LR_4x_REGS(EMU_DST_DOCK_DAC2),
+	LR_4x_REGS(EMU_DST_DOCK_DAC3),
+	LR_4x_REGS(EMU_DST_DOCK_DAC4),
+	LR_4x_REGS(EMU_DST_HAMOA_DAC),
+	ADAT_4x_REGS(EMU_DST_HANA_ADAT),
+};
+static_assert(ARRAY_SIZE(emu1010_4x_output_dst) == ARRAY_SIZE(emu1010_4x_output_texts));
+
 /* 1010 rev2 */
 
 static const char * const snd_emu1010b_output_texts[] = {
@@ -361,6 +618,52 @@  static const unsigned short emu1010b_output_dflt[] = {
 	EMU_SRC_ALICE_EMU32A+4, EMU_SRC_ALICE_EMU32A+5, EMU_SRC_ALICE_EMU32A+6, EMU_SRC_ALICE_EMU32A+7,
 };
 
+static const char * const snd_emu1010b_2x_output_texts[] = {
+	LR_CTLS("Dock DAC1"),
+	LR_CTLS("Dock DAC2"),
+	LR_CTLS("Dock DAC3"),
+	LR_CTLS("Dock SPDIF"),
+	ADAT_2x_CTLS("Dock "),
+	LR_CTLS("0202 DAC"),
+	LR_CTLS("1010 SPDIF"),
+	ADAT_2x_CTLS("1010 "),
+};
+static_assert(ARRAY_SIZE(snd_emu1010b_2x_output_texts) <= NUM_OUTPUT_DESTS);
+
+static const unsigned short emu1010b_2x_output_dst[][2] = {
+	LR_2x_REGS(EMU_DST_DOCK_DAC1),
+	LR_2x_REGS(EMU_DST_DOCK_DAC2),
+	LR_2x_REGS(EMU_DST_DOCK_DAC3),
+	LR_2x_REGS(EMU_DST_MDOCK_SPDIF),
+	ADAT_2x_REGS(EMU_DST_MDOCK_ADAT),
+	LR_2x_REGS(EMU_DST_HAMOA_DAC),
+	LR_2x_REGS(EMU_DST_HANA_SPDIF),
+	ADAT_2x_REGS(EMU_DST_HANA_ADAT),
+};
+static_assert(ARRAY_SIZE(emu1010b_2x_output_dst) == ARRAY_SIZE(snd_emu1010b_2x_output_texts));
+
+static const char * const snd_emu1010b_4x_output_texts[] = {
+	LR_CTLS("Dock DAC1"),
+	LR_CTLS("Dock DAC2"),
+	LR_CTLS("Dock DAC3"),
+	ADAT_4x_CTLS("Dock "),
+	LR_CTLS("0202 DAC"),
+	LR_CTLS("1010 SPDIF"),
+	ADAT_4x_CTLS("1010 "),
+};
+static_assert(ARRAY_SIZE(snd_emu1010b_4x_output_texts) <= NUM_OUTPUT_DESTS);
+
+static const unsigned short emu1010b_4x_output_dst[][4] = {
+	LR_4x_REGS(EMU_DST_DOCK_DAC1),
+	LR_4x_REGS(EMU_DST_DOCK_DAC2),
+	LR_4x_REGS(EMU_DST_DOCK_DAC3),
+	ADAT_4x_REGS(EMU_DST_MDOCK_ADAT),
+	LR_4x_REGS(EMU_DST_HAMOA_DAC),
+	LR_4x_REGS(EMU_DST_HANA_SPDIF),
+	ADAT_4x_REGS(EMU_DST_HANA_ADAT),
+};
+static_assert(ARRAY_SIZE(emu1010b_4x_output_dst) == ARRAY_SIZE(snd_emu1010b_4x_output_texts));
+
 /* 1616(m) cardbus */
 
 static const char * const snd_emu1616_output_texts[] = {
@@ -394,6 +697,40 @@  static const unsigned short emu1616_output_dflt[] = {
 };
 static_assert(ARRAY_SIZE(emu1616_output_dflt) == ARRAY_SIZE(emu1616_output_dst));
 
+static const char * const snd_emu1616_2x_output_texts[] = {
+	LR_CTLS("Dock DAC1"),
+	LR_CTLS("Dock DAC2"),
+	LR_CTLS("Dock DAC3"),
+	LR_CTLS("Dock SPDIF"),
+	ADAT_2x_CTLS("Dock "),
+};
+static_assert(ARRAY_SIZE(snd_emu1616_2x_output_texts) <= NUM_OUTPUT_DESTS);
+
+static const unsigned short emu1616_2x_output_dst[][2] = {
+	LR_2x_REGS(EMU_DST_DOCK_DAC1),
+	LR_2x_REGS(EMU_DST_DOCK_DAC2),
+	LR_2x_REGS(EMU_DST_DOCK_DAC3),
+	LR_2x_REGS(EMU_DST_MDOCK_SPDIF),
+	ADAT_2x_REGS(EMU_DST_MDOCK_ADAT),
+};
+static_assert(ARRAY_SIZE(emu1616_2x_output_dst) == ARRAY_SIZE(snd_emu1616_2x_output_texts));
+
+static const char * const snd_emu1616_4x_output_texts[] = {
+	LR_CTLS("Dock DAC1"),
+	LR_CTLS("Dock DAC2"),
+	LR_CTLS("Dock DAC3"),
+	ADAT_4x_CTLS("Dock "),
+};
+static_assert(ARRAY_SIZE(snd_emu1616_4x_output_texts) <= NUM_OUTPUT_DESTS);
+
+static const unsigned short emu1616_4x_output_dst[][4] = {
+	LR_4x_REGS(EMU_DST_DOCK_DAC1),
+	LR_4x_REGS(EMU_DST_DOCK_DAC2),
+	LR_4x_REGS(EMU_DST_DOCK_DAC3),
+	ADAT_4x_REGS(EMU_DST_MDOCK_ADAT),
+};
+static_assert(ARRAY_SIZE(emu1616_4x_output_dst) == ARRAY_SIZE(snd_emu1616_4x_output_texts));
+
 /* 0404 rev1 & rev2 */
 
 static const char * const snd_emu0404_output_texts[] = {
@@ -414,6 +751,22 @@  static const unsigned short emu0404_output_dflt[] = {
 };
 static_assert(ARRAY_SIZE(emu0404_output_dflt) == ARRAY_SIZE(emu0404_output_dst));
 
+static const unsigned short emu0404_2x_output_dst[][2] = {
+	LR_2x_REGS(EMU_DST_HAMOA_DAC),
+	LR_2x_REGS(EMU_DST_HANA_SPDIF),
+};
+static_assert(ARRAY_SIZE(emu0404_2x_output_dst) == ARRAY_SIZE(snd_emu0404_output_texts));
+
+static const char * const snd_emu0404_4x_output_texts[] = {
+	LR_CTLS("DAC"),
+};
+static_assert(ARRAY_SIZE(snd_emu0404_4x_output_texts) <= NUM_OUTPUT_DESTS);
+
+static const unsigned short emu0404_4x_output_dst[][4] = {
+	LR_4x_REGS(EMU_DST_HAMOA_DAC),
+};
+static_assert(ARRAY_SIZE(emu0404_4x_output_dst) == ARRAY_SIZE(snd_emu0404_4x_output_texts));
+
 /*
  * Data destinations - FPGA outputs going to Alice2 (Audigy) for
  *   capture (EMU32 + I2S links)
@@ -543,168 +896,267 @@  static const unsigned short emu0404_input_dflt[] = {
 };
 
 struct snd_emu1010_routing_info {
-	const char * const *src_texts[2];
-	const char * const *out_texts;
-	const unsigned short *src_regs;
-	const unsigned short *out_regs;
+	const char * const *src_texts[4];
+	const char * const *out_texts[3];
+	const unsigned short *src_regs[3];
+	const unsigned short *out_regs[3];
 	const unsigned short *in_regs;
 	const unsigned short *out_dflts;
 	const unsigned short *in_dflts;
-	unsigned n_srcs[2];
-	unsigned n_outs;
-	unsigned n_ins[2];
+	unsigned n_srcs[4];
+	unsigned n_outs[3];
+	unsigned n_ins[4];
 };
 
 static const struct snd_emu1010_routing_info emu1010_routing_info[] = {
 	{
 		/* rev1 1010 */
-		.src_regs = emu1010_src_regs,
-		.src_texts = { emu1010_src_texts, emu1010_das_src_texts },
-		.n_srcs = { ARRAY_SIZE(emu1010_src_texts), ARRAY_SIZE(emu1010_das_src_texts) },
+		.src_regs = { emu1010_src_regs, emu1010_2x_src_regs[0], emu1010_4x_src_regs[0] },
+		.src_texts = { emu1010_src_texts, emu1010_das_src_texts,
+			       emu1010_2x_src_texts, emu1010_4x_src_texts },
+		.n_srcs = { ARRAY_SIZE(emu1010_src_texts), ARRAY_SIZE(emu1010_das_src_texts),
+			    ARRAY_SIZE(emu1010_2x_src_texts), ARRAY_SIZE(emu1010_4x_src_texts) },
 
 		.out_dflts = emu1010_output_dflt,
-		.out_regs = emu1010_output_dst,
-		.out_texts = emu1010_output_texts,
-		.n_outs = ARRAY_SIZE(emu1010_output_dst),
+		.out_regs = { emu1010_output_dst, emu1010_2x_output_dst[0], emu1010_4x_output_dst[0] },
+		.out_texts = { emu1010_output_texts,
+			       emu1010_2x_output_texts, emu1010_4x_output_texts },
+		.n_outs = { ARRAY_SIZE(emu1010_output_texts),
+			    ARRAY_SIZE(emu1010_2x_output_texts), ARRAY_SIZE(emu1010_4x_output_texts) },
 
 		.in_dflts = emu1010_input_dflt,
 		.in_regs = emu1010_input_dst,
-		.n_ins = { ARRAY_SIZE(emu1010_input_dst), 16 },
+		.n_ins = { ARRAY_SIZE(emu1010_input_dst), 16, 16, 16 },
 	},
 	{
 		/* rev2 1010 */
-		.src_regs = emu1010b_src_regs,
-		.src_texts = { emu1010b_src_texts, emu1010b_das_src_texts },
-		.n_srcs = { ARRAY_SIZE(emu1010b_src_texts), ARRAY_SIZE(emu1010b_das_src_texts) },
+		.src_regs = { emu1010b_src_regs, emu1010b_2x_src_regs[0], emu1010b_4x_src_regs[0] },
+		.src_texts = { emu1010b_src_texts, emu1010b_das_src_texts,
+			       emu1010b_2x_src_texts, emu1010b_4x_src_texts },
+		.n_srcs = { ARRAY_SIZE(emu1010b_src_texts), ARRAY_SIZE(emu1010b_das_src_texts),
+			    ARRAY_SIZE(emu1010b_2x_src_texts), ARRAY_SIZE(emu1010b_4x_src_texts) },
 
 		.out_dflts = emu1010b_output_dflt,
-		.out_regs = emu1010b_output_dst,
-		.out_texts = snd_emu1010b_output_texts,
-		.n_outs = ARRAY_SIZE(emu1010b_output_dst),
+		.out_regs = { emu1010b_output_dst, emu1010b_2x_output_dst[0], emu1010b_4x_output_dst[0] },
+		.out_texts = { snd_emu1010b_output_texts,
+			       snd_emu1010b_2x_output_texts, snd_emu1010b_4x_output_texts },
+		.n_outs = { ARRAY_SIZE(snd_emu1010b_output_texts),
+			    ARRAY_SIZE(snd_emu1010b_2x_output_texts), ARRAY_SIZE(snd_emu1010b_4x_output_texts) },
 
 		.in_dflts = emu1010_input_dflt,
 		.in_regs = emu1010_input_dst,
-		.n_ins = { ARRAY_SIZE(emu1010_input_dst) - 6, 16 },
+		.n_ins = { ARRAY_SIZE(emu1010_input_dst) - 6, 16, 16, 16 },
 	},
 	{
 		/* 1616(m) cardbus */
-		.src_regs = emu1616_src_regs,
-		.src_texts = { emu1616_src_texts, emu1616_das_src_texts },
-		.n_srcs = { ARRAY_SIZE(emu1616_src_texts), ARRAY_SIZE(emu1616_das_src_texts) },
+		.src_regs = { emu1616_src_regs, emu1616_2x_src_regs[0], emu1616_4x_src_regs[0] },
+		.src_texts = { emu1616_src_texts, emu1616_das_src_texts,
+			       emu1616_2x_src_texts, emu1616_4x_src_texts },
+		.n_srcs = { ARRAY_SIZE(emu1616_src_texts), ARRAY_SIZE(emu1616_das_src_texts),
+			    ARRAY_SIZE(emu1616_2x_src_texts), ARRAY_SIZE(emu1616_4x_src_texts) },
 
 		.out_dflts = emu1616_output_dflt,
-		.out_regs = emu1616_output_dst,
-		.out_texts = snd_emu1616_output_texts,
-		.n_outs = ARRAY_SIZE(emu1616_output_dst),
+		.out_regs = { emu1616_output_dst, emu1616_2x_output_dst[0], emu1616_4x_output_dst[0] },
+		.out_texts = { snd_emu1616_output_texts,
+			       snd_emu1616_2x_output_texts, snd_emu1616_4x_output_texts },
+		.n_outs = { ARRAY_SIZE(snd_emu1616_output_texts),
+			    ARRAY_SIZE(snd_emu1616_2x_output_texts), ARRAY_SIZE(snd_emu1616_4x_output_texts) },
 
 		.in_dflts = emu1010_input_dflt,
 		.in_regs = emu1010_input_dst,
-		.n_ins = { ARRAY_SIZE(emu1010_input_dst) - 6, 16 },
+		.n_ins = { ARRAY_SIZE(emu1010_input_dst) - 6, 16, 16, 16 },
 	},
 	{
 		/* 0404 */
-		.src_regs = emu0404_src_regs,
-		.src_texts = { emu0404_src_texts, emu0404_das_src_texts },
-		.n_srcs = { ARRAY_SIZE(emu0404_src_texts), ARRAY_SIZE(emu0404_das_src_texts) },
+		.src_regs = { emu0404_src_regs, emu0404_2x_src_regs[0], emu0404_4x_src_regs[0] },
+		.src_texts = { emu0404_src_texts, emu0404_das_src_texts,
+			       emu0404_das_src_texts, emu0404_4x_src_texts },
+		.n_srcs = { ARRAY_SIZE(emu0404_src_texts), ARRAY_SIZE(emu0404_das_src_texts),
+			    ARRAY_SIZE(emu0404_das_src_texts), ARRAY_SIZE(emu0404_4x_src_texts) },
 
 		.out_dflts = emu0404_output_dflt,
-		.out_regs = emu0404_output_dst,
-		.out_texts = snd_emu0404_output_texts,
-		.n_outs = ARRAY_SIZE(emu0404_output_dflt),
+		.out_regs = { emu0404_output_dst, emu0404_2x_output_dst[0], emu0404_4x_output_dst[0] },
+		.out_texts = { snd_emu0404_output_texts,
+			       snd_emu0404_output_texts, snd_emu0404_4x_output_texts },
+		.n_outs = { ARRAY_SIZE(snd_emu0404_output_texts),
+			    ARRAY_SIZE(snd_emu0404_output_texts), ARRAY_SIZE(snd_emu0404_4x_output_texts) },
 
 		.in_dflts = emu0404_input_dflt,
 		.in_regs = emu1010_input_dst,
-		.n_ins = { ARRAY_SIZE(emu1010_input_dst) - 6, 16 },
+		.n_ins = { ARRAY_SIZE(emu1010_input_dst) - 6, 16, 16, 16 },
 	},
 };
 
 static unsigned emu1010_idx(struct snd_emu10k1 *emu)
 {
 	return emu->card_capabilities->emu_model - 1;
 }
 
+static void snd_emu1010_source_apply(struct snd_emu10k1 *emu, unsigned shift,
+				     const unsigned short *regs,
+				     const unsigned short *vals)
+{
+	unsigned short avals[4];
+
+	if ((vals[0] & 0x700) == 0x300) {  // EMU32x
+		// Only 1x playback for now
+		avals[0] = avals[1] = avals[2] = avals[3] = vals[0];
+		vals = avals;
+	}
+	switch (shift) {
+	case 2:
+		snd_emu1010_fpga_link_dst_src_write(emu, regs[3], vals[3]);
+		snd_emu1010_fpga_link_dst_src_write(emu, regs[2], vals[2]);
+		fallthrough;
+	case 1:
+		snd_emu1010_fpga_link_dst_src_write(emu, regs[1], vals[1]);
+		fallthrough;
+	default:
+		snd_emu1010_fpga_link_dst_src_write(emu, regs[0], vals[0]);
+		break;
+	}
+}
+
 static void snd_emu1010_output_source_apply(struct snd_emu10k1 *emu,
 					    int channel, int src)
 {
 	const struct snd_emu1010_routing_info *emu_ri =
 		&emu1010_routing_info[emu1010_idx(emu)];
+	unsigned shift = emu->emu1010.clock_shift;
+	const unsigned short *regs = &emu_ri->out_regs[shift][channel << shift];
+	const unsigned short *vals = &emu_ri->src_regs[shift][src << shift];
 
-	snd_emu1010_fpga_link_dst_src_write(emu,
-		emu_ri->out_regs[channel], emu_ri->src_regs[src]);
+	snd_emu1010_source_apply(emu, shift, regs, vals);
 }
 
 static void snd_emu1010_input_source_apply(struct snd_emu10k1 *emu,
 					   int channel, int src)
 {
 	const struct snd_emu1010_routing_info *emu_ri =
 		&emu1010_routing_info[emu1010_idx(emu)];
+	unsigned shift = emu->emu1010.clock_shift;
+	const unsigned short *regs = &emu_ri->in_regs[channel];
+	const unsigned short *vals = &emu_ri->src_regs[shift][src << shift];
 
-	snd_emu1010_fpga_link_dst_src_write(emu,
-		emu_ri->in_regs[channel], emu_ri->src_regs[src]);
+	// Only 1x capture for now
+	snd_emu1010_fpga_link_dst_src_write(emu, regs[0], vals[0]);
 }
 
-static void snd_emu1010_apply_sources(struct snd_emu10k1 *emu)
+static void snd_emu1010_apply_sources(struct snd_emu10k1 *emu, int active)
 {
 	const struct snd_emu1010_routing_info *emu_ri =
 		&emu1010_routing_info[emu1010_idx(emu)];
-	unsigned iidx = emu->das_mode;
+	unsigned oidx = emu->emu1010.clock_shift;
+	unsigned iidx = emu->das_mode + oidx;
 
-	for (unsigned i = 0; i < emu_ri->n_outs; i++)
+	for (unsigned i = 0; i < emu_ri->n_outs[oidx]; i++)
 		snd_emu1010_output_source_apply(
-			emu, i, emu->emu1010.output_source[i]);
+			emu, i, active ? emu->emu1010.output_source[i] : 0);
 	for (unsigned i = 0; i < emu_ri->n_ins[iidx]; i++)
 		snd_emu1010_input_source_apply(
-			emu, i, emu->emu1010.input_source[i]);
+			emu, i, active ? emu->emu1010.input_source[i] : 0);
 }
 
 static u8 emu1010_map_source(const struct snd_emu1010_routing_info *emu_ri,
 			     unsigned das_mode, unsigned val)
 {
 	for (unsigned i = 0; i < emu_ri->n_srcs[das_mode]; i++)
-		if (val == emu_ri->src_regs[i])
+		if (val == emu_ri->src_regs[0][i])
 			return i;
 	return 0;
 }
 
+static const unsigned internal_sources[3] = { 16, 16, 8 };
+
+static unsigned emu1010_remap_source(const struct snd_emu1010_routing_info *emu_ri,
+				     unsigned oshift, unsigned nshift, unsigned src)
+{
+	unsigned ibase = emu_ri->n_srcs[oshift + 1] - internal_sources[oshift];
+	if (src >= ibase) {
+		int raw_src = src - ibase - internal_sources[nshift];
+		if (raw_src < 0)
+			return raw_src + emu_ri->n_srcs[nshift + 1];
+	} else {
+		unsigned reg = emu_ri->src_regs[oshift][src << oshift];
+		for (unsigned i = 0; i < emu_ri->n_srcs[nshift + 1]; i++)
+			if (reg == emu_ri->src_regs[nshift][i << nshift])
+				return i;
+	}
+	return 0;
+}
+
+static void snd_emu1010_remap_sources(struct snd_emu10k1 *emu, int oshift, int nshift)
+{
+	const struct snd_emu1010_routing_info *emu_ri =
+		&emu1010_routing_info[emu1010_idx(emu)];
+	unsigned char srcs[NUM_OUTPUT_DESTS];
+	unsigned o, n, n_dsts_o, n_dsts_n;
+
+	n_dsts_o = emu_ri->n_outs[oshift];
+	n_dsts_n = emu_ri->n_outs[nshift];
+	for (n = 0; n < n_dsts_n; n++) {
+		unsigned reg = emu_ri->out_regs[nshift][n << nshift];
+		unsigned src = 0;
+		for (o = 0; o < n_dsts_o; o++) {
+			if (emu_ri->out_regs[oshift][o << oshift] == reg) {
+				src = emu1010_remap_source(emu_ri, oshift, nshift,
+							   emu->emu1010.output_source[o]);
+				break;
+			}
+		}
+		srcs[n] = src;
+	}
+	memcpy(emu->emu1010.output_source, srcs, n_dsts_n);
+
+	n_dsts_o = emu_ri->n_ins[oshift + 1];
+	n_dsts_n = emu_ri->n_ins[nshift + 1];
+	for (n = 0; n < n_dsts_n; n++)
+		emu->emu1010.input_source[n] = (n >= n_dsts_o) ? 0 :
+			emu1010_remap_source(emu_ri, oshift, nshift,
+					     emu->emu1010.input_source[n]);
+}
+
 static int snd_emu1010_input_output_source_info(struct snd_kcontrol *kcontrol,
 						struct snd_ctl_elem_info *uinfo)
 {
 	struct snd_emu10k1 *emu = snd_kcontrol_chip(kcontrol);
 	const struct snd_emu1010_routing_info *emu_ri =
 		&emu1010_routing_info[emu1010_idx(emu)];
-	unsigned iidx = emu->das_mode;
+	unsigned iidx = emu->das_mode + emu->emu1010.clock_shift;
 
 	return snd_ctl_enum_info(uinfo, 1, emu_ri->n_srcs[iidx], emu_ri->src_texts[iidx]);
 }
 
 static int snd_emu1010_output_source_get(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_emu10k1 *emu = snd_kcontrol_chip(kcontrol);
 	const struct snd_emu1010_routing_info *emu_ri =
 		&emu1010_routing_info[emu1010_idx(emu)];
+	unsigned oidx = emu->emu1010.clock_shift;
 	unsigned channel = kcontrol->private_value;
 
-	if (channel >= emu_ri->n_outs)
+	if (channel >= emu_ri->n_outs[oidx])
 		return -EINVAL;
 	ucontrol->value.enumerated.item[0] = emu->emu1010.output_source[channel];
 	return 0;
 }
 
 static int snd_emu1010_output_source_put(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_emu10k1 *emu = snd_kcontrol_chip(kcontrol);
 	const struct snd_emu1010_routing_info *emu_ri =
 		&emu1010_routing_info[emu1010_idx(emu)];
-	unsigned iidx = emu->das_mode;
+	unsigned oidx = emu->emu1010.clock_shift;
+	unsigned iidx = emu->das_mode + oidx;
 	unsigned val = ucontrol->value.enumerated.item[0];
 	unsigned channel = kcontrol->private_value;
 	int change;
 
 	if (val >= emu_ri->n_srcs[iidx])
 		return -EINVAL;
-	if (channel >= emu_ri->n_outs)
+	if (channel >= emu_ri->n_outs[oidx])
 		return -EINVAL;
 	change = (emu->emu1010.output_source[channel] != val);
 	if (change) {
@@ -728,7 +1180,7 @@  static int snd_emu1010_input_source_get(struct snd_kcontrol *kcontrol,
 	struct snd_emu10k1 *emu = snd_kcontrol_chip(kcontrol);
 	const struct snd_emu1010_routing_info *emu_ri =
 		&emu1010_routing_info[emu1010_idx(emu)];
-	unsigned iidx = emu->das_mode;
+	unsigned iidx = emu->das_mode + emu->emu1010.clock_shift;
 	unsigned channel = kcontrol->private_value;
 
 	if (channel >= emu_ri->n_ins[iidx])
@@ -743,7 +1195,7 @@  static int snd_emu1010_input_source_put(struct snd_kcontrol *kcontrol,
 	struct snd_emu10k1 *emu = snd_kcontrol_chip(kcontrol);
 	const struct snd_emu1010_routing_info *emu_ri =
 		&emu1010_routing_info[emu1010_idx(emu)];
-	unsigned iidx = emu->das_mode;
+	unsigned iidx = emu->das_mode + emu->emu1010.clock_shift;
 	unsigned val = ucontrol->value.enumerated.item[0];
 	unsigned channel = kcontrol->private_value;
 	int change;
@@ -772,20 +1224,32 @@  static int add_emu1010_source_mixers(struct snd_emu10k1 *emu)
 {
 	const struct snd_emu1010_routing_info *emu_ri =
 		&emu1010_routing_info[emu1010_idx(emu)];
-	unsigned iidx = emu->das_mode;
+	unsigned oidx = emu->emu1010.clock_shift;
+	unsigned iidx = emu->das_mode + oidx;
 	int err;
 
 	err = add_ctls(emu, &emu1010_output_source_ctl,
-		       emu_ri->out_texts, emu_ri->n_outs);
+		       emu_ri->out_texts[oidx], emu_ri->n_outs[oidx]);
 	if (err < 0)
 		return err;
 	err = add_ctls(emu, &emu1010_input_source_ctl,
 		       iidx ? emu1010_das_input_texts :
 			      emu1010_input_texts,
 		       emu_ri->n_ins[iidx]);
 	return err;
 }
 
+static void remove_emu1010_source_mixers(struct snd_emu10k1 *emu)
+{
+	struct snd_kcontrol *kctl, *next;
+
+	list_for_each_entry_safe(kctl, next, &emu->card->controls, list) {
+		size_t nlen = strlen(kctl->id.name);
+		if (nlen > 5 && !memcmp(kctl->id.name + nlen - 5, " Enum", 5))
+			snd_ctl_remove(emu->card, kctl);
+	}
+}
+
 
 static const char * const snd_emu1010_adc_pads[] = {
 	"ADC1 14dB PAD 0202 Capture Switch",
@@ -1037,7 +1501,8 @@  static int snd_emu1010_clock_source_put(struct snd_kcontrol *kcontrol,
 	change = (emu->emu1010.clock_source != val);
 	if (change) {
 		emu->emu1010.clock_source = val;
-		emu->emu1010.wclock = emu_ci->vals[val];
+		emu->emu1010.wclock = (emu->emu1010.wclock & ~EMU_HANA_WCLOCK_SRC_MASK) |
+					emu_ci->vals[val];
 		snd_emu1010_update_clock(emu);
 
 		snd_emu1010_fpga_write(emu, EMU_HANA_UNMUTE, EMU_MUTE);
@@ -1110,6 +1575,69 @@  static const struct snd_kcontrol_new snd_emu1010_clock_fallback =
 	.put = snd_emu1010_clock_fallback_put
 };
 
+static int snd_emu1010_clock_shift_info(struct snd_kcontrol *kcontrol,
+					     struct snd_ctl_elem_info *uinfo)
+{
+	static const char * const texts[3] = {
+		"x1", "x2", "x4"
+	};
+
+	return snd_ctl_enum_info(uinfo, 1, 3, texts);
+}
+
+static int snd_emu1010_clock_shift_get(struct snd_kcontrol *kcontrol,
+					    struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_emu10k1 *emu = snd_kcontrol_chip(kcontrol);
+
+	ucontrol->value.enumerated.item[0] = emu->emu1010.clock_shift;
+	return 0;
+}
+
+static int snd_emu1010_clock_shift_put(struct snd_kcontrol *kcontrol,
+					    struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_emu10k1 *emu = snd_kcontrol_chip(kcontrol);
+	unsigned int val = ucontrol->value.enumerated.item[0];
+	int change;
+
+	if (val >= 3)
+		return -EINVAL;
+	change = (emu->emu1010.clock_shift != val);
+	if (change) {
+		snd_emu1010_fpga_write(emu, EMU_HANA_UNMUTE, EMU_MUTE);
+		snd_emu1010_apply_sources(emu, 0);
+
+		remove_emu1010_source_mixers(emu);
+		snd_emu1010_remap_sources(emu, emu->emu1010.clock_shift, val);
+		emu->emu1010.clock_shift = val;
+		add_emu1010_source_mixers(emu);
+
+		spin_lock_irq(&emu->reg_lock);
+		emu->emu1010.wclock = (emu->emu1010.wclock & ~EMU_HANA_WCLOCK_MULT_MASK) |
+					(val << 3);
+		snd_emu1010_update_clock(emu);
+		snd_emu1010_fpga_write(emu, EMU_HANA_WCLOCK, emu->emu1010.wclock);
+		spin_unlock_irq(&emu->reg_lock);
+
+		msleep(10);  // Allow DLL to settle
+		snd_emu1010_apply_sources(emu, 1);
+		snd_emu1010_fpga_write(emu, EMU_HANA_UNMUTE, EMU_UNMUTE);
+	}
+	return change;
+}
+
+static const struct snd_kcontrol_new snd_emu1010_clock_shift =
+{
+	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "Clock Multiplier",
+	.count = 1,
+	.info = snd_emu1010_clock_shift_info,
+	.get = snd_emu1010_clock_shift_get,
+	.put = snd_emu1010_clock_shift_put
+};
+
 static int snd_emu1010_optical_out_info(struct snd_kcontrol *kcontrol,
 					  struct snd_ctl_elem_info *uinfo)
 {
@@ -2388,11 +2916,18 @@  int snd_emu10k1_mixer(struct snd_emu10k1 *emu,
 		for (i = 0; i < emu_ri->n_ins[midx]; i++)
 			emu->emu1010.input_source[i] =
 				emu1010_map_source(emu_ri, midx, emu_ri->in_dflts[i]);
-		for (i = 0; i < emu_ri->n_outs; i++)
+		for (i = 0; i < emu_ri->n_outs[0]; i++)
 			emu->emu1010.output_source[i] =
 				emu1010_map_source(emu_ri, midx, emu_ri->out_dflts[i]);
-		snd_emu1010_apply_sources(emu);
+		snd_emu1010_apply_sources(emu, 1);
 
+		if (emu->das_mode) {
+			kctl = emu->ctl_clock_shift =
+					snd_ctl_new1(&snd_emu1010_clock_shift, emu);
+			err = snd_ctl_add(card, kctl);
+			if (err < 0)
+				return err;
+		}
 		kctl = emu->ctl_clock_source = snd_ctl_new1(&snd_emu1010_clock_source, emu);
 		err = snd_ctl_add(card, kctl);
 		if (err < 0)
diff --git a/sound/pci/emu10k1/emupcm.c b/sound/pci/emu10k1/emupcm.c
index a433793345d4..408db0d7c959 100644
--- a/sound/pci/emu10k1/emupcm.c
+++ b/sound/pci/emu10k1/emupcm.c
@@ -1182,19 +1182,42 @@  static void snd_emu10k1_pcm_efx_mixer_notify(struct snd_emu10k1 *emu, int idx, i
 	snd_emu10k1_pcm_mixer_notify1(emu, emu->ctl_efx_attn, idx, activate);
 }
 
+static void snd_emu10k1_pcm_clock_mutiplier_notify(struct snd_emu10k1 *emu)
+{
+	struct snd_kcontrol *kctl = emu->ctl_clock_shift;
+	struct snd_ctl_elem_id id;
+
+	// Modifying the clock multiplier during playback/capture
+	// would make a mess, so we lock it.
+	if (emu->emu1010.clock_users) {
+		if (!(kctl->vd[0].access & SNDRV_CTL_ELEM_ACCESS_WRITE))
+			return;
+		kctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_WRITE;
+	} else {
+		if (kctl->vd[0].access & SNDRV_CTL_ELEM_ACCESS_WRITE)
+			return;
+		kctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_WRITE;
+	}
+	snd_ctl_build_ioff(&id, kctl, 0);
+	snd_ctl_notify(emu->card, SNDRV_CTL_EVENT_MASK_INFO, &id);
+}
+
 static void snd_emu10k1_pcm_free_substream(struct snd_pcm_runtime *runtime)
 {
 	kfree(runtime->private_data);
 }
 
 static int snd_emu10k1_efx_playback_close(struct snd_pcm_substream *substream)
 {
 	struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
 	struct snd_emu10k1_pcm_mixer *mix;
 	int i;
 
-	if (emu->das_mode)
+	if (emu->das_mode) {
+		emu->emu1010.clock_users--;
+		snd_emu10k1_pcm_clock_mutiplier_notify(emu);
 		return 0;
+	}
 	for (i = 0; i < NUM_EFX_PLAYBACK; i++) {
 		mix = &emu->efx_pcm_mixer[i];
 		mix->epcm = NULL;
@@ -1248,8 +1271,11 @@  static int snd_emu10k1_efx_playback_open(struct snd_pcm_substream *substream)
 		return err;
 	}
 
-	if (emu->das_mode)
+	if (emu->das_mode) {
+		emu->emu1010.clock_users++;
+		snd_emu10k1_pcm_clock_mutiplier_notify(emu);
 		return 0;
+	}
 	for (i = 0; i < NUM_EFX_PLAYBACK; i++) {
 		mix = &emu->efx_pcm_mixer[i];
 		for (j = 0; j < 8; j++)
@@ -1458,13 +1484,24 @@  static int snd_emu10k1_capture_efx_open(struct snd_pcm_substream *substream)
 				   &hw_constraints_capture_buffer_sizes);
 	emu->capture_efx_interrupt = snd_emu10k1_pcm_efx_interrupt;
 	emu->pcm_capture_efx_substream = substream;
+
+	if (emu->das_mode) {
+		emu->emu1010.clock_users++;
+		snd_emu10k1_pcm_clock_mutiplier_notify(emu);
+	}
+
 	return 0;
 }
 
 static int snd_emu10k1_capture_efx_close(struct snd_pcm_substream *substream)
 {
 	struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
 
+	if (emu->das_mode) {
+		emu->emu1010.clock_users--;
+		snd_emu10k1_pcm_clock_mutiplier_notify(emu);
+	}
+
 	emu->capture_efx_interrupt = NULL;
 	emu->pcm_capture_efx_substream = NULL;
 	return 0;
diff --git a/sound/pci/emu10k1/io.c b/sound/pci/emu10k1/io.c
index 74df2330015f..5c920cf6425b 100644
--- a/sound/pci/emu10k1/io.c
+++ b/sound/pci/emu10k1/io.c
@@ -404,19 +404,47 @@  void snd_emu1010_update_clock(struct snd_emu10k1 *emu)
 		clock = 48000;
 		leds = EMU_HANA_DOCK_LEDS_2_48K;
 		break;
+	case EMU_HANA_WCLOCK_INT_44_1K | EMU_HANA_WCLOCK_2X:
+		clock = 44100;
+		leds = 0;
+		break;
+	case EMU_HANA_WCLOCK_INT_48K | EMU_HANA_WCLOCK_2X:
+		clock = 48000;
+		leds = EMU_HANA_DOCK_LEDS_2_96K;
+		break;
+	case EMU_HANA_WCLOCK_INT_44_1K | EMU_HANA_WCLOCK_4X:
+		clock = 44100;
+		leds = 0;
+		break;
+	case EMU_HANA_WCLOCK_INT_48K | EMU_HANA_WCLOCK_4X:
+		clock = 48000;
+		leds = EMU_HANA_DOCK_LEDS_2_192K;
+		break;
 	default:
 		clock = snd_emu1010_get_raw_rate(
 				emu, emu->emu1010.wclock & EMU_HANA_WCLOCK_SRC_MASK);
 		// The raw rate reading is rather coarse (it cannot accurately
 		// represent 44.1 kHz) and fluctuates slightly. Luckily, the
 		// clock comes from digital inputs, which use standardized rates.
 		// So we round to the closest standard rate and ignore discrepancies.
 		if (clock < 46000) {
 			clock = 44100;
 			leds = EMU_HANA_DOCK_LEDS_2_EXT | EMU_HANA_DOCK_LEDS_2_44K;
-		} else {
+		} else if (clock < 75000) {
 			clock = 48000;
 			leds = EMU_HANA_DOCK_LEDS_2_EXT | EMU_HANA_DOCK_LEDS_2_48K;
+		} else if (clock < 92000) {
+			clock = 44100;
+			leds = EMU_HANA_DOCK_LEDS_2_EXT;
+		} else if (clock < 150000) {
+			clock = 48000;
+			leds = EMU_HANA_DOCK_LEDS_2_EXT | EMU_HANA_DOCK_LEDS_2_96K;
+		} else if (clock < 184000) {
+			clock = 44100;
+			leds = EMU_HANA_DOCK_LEDS_2_EXT;
+		} else {
+			clock = 48000;
+			leds = EMU_HANA_DOCK_LEDS_2_EXT | EMU_HANA_DOCK_LEDS_2_192K;
 		}
 		break;
 	}