[PATCH 0/5] ASoC: TI codecs: sort the reg

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* [PATCH 0/5] ASoC: TI codecs: sort the reg_defaults tables
@ 2026-08-05 10:41 Peter Ujfalusi
  2026-08-05 10:41 ` [PATCH 1/5] ASoC: pcm512x: sort the register default table Peter Ujfalusi
                   ` (4 more replies)
  0 siblings, 5 replies; 6+ messages in thread
From: Peter Ujfalusi @ 2026-08-05 10:41 UTC (permalink / raw)
  To: Mark Brown, Liam Girdwood, Shenghao Ding, Kevin Lu, Baojun Xu,
	Sen Wang
  Cc: linux-sound, stable

The reg_defaults array of a regmap_config must be sorted by ascending
register address: regcache_lookup_reg() finds entries in it with
bsearch(), and regcache_init() only kmemdup_array()s the array, it never
sorts it.  See commit fd80df352ba1 ("regcache: Add support for sorting
defaults arrays").

When the array is not sorted, bsearch() descends into the wrong half and
a number of entries can never be found.  regcache_reg_needs_sync() then
cannot compare the cached value against the default and always reports
that a sync is needed, so those registers are written to the device on
every regcache_sync() even if they were never touched.

I found this while chasing a SoundWire NAK on an unimplemented register
and audited the reg_defaults tables in sound/ by replaying lib/bsearch.c
over each of them.  These are the affected TI/Burr-Brown codecs:

  pcm512x_reg_defaults    45 entries, 24 unreachable
  tas675x_reg_defaults    69 entries, 14 unreachable
  tas2552_reg_defs        21 entries,  7 unreachable
  tas2764_reg_defaults    11 entries,  1 unreachable
  tas2780_reg_defaults    10 entries,  1 unreachable

The patches only reorder the existing entries.  The text of every entry
is kept verbatim, no default value is changed, and each resulting table
was verified to be fully reachable.

tas2783-sdw was fixed separately, it had already been posted.

The series is based on broonie/for-linus.

Peter Ujfalusi (5):
  ASoC: pcm512x: sort the register default table
  ASoC: tas2552: sort the register default table
  ASoC: tas2764: sort the register default table
  ASoC: tas2780: sort the register default table
  ASoC: tas675x: sort the register default table

 sound/soc/codecs/pcm512x.c | 40 +++++++++++++++++++-------------------
 sound/soc/codecs/tas2552.c | 14 ++++++-------
 sound/soc/codecs/tas2764.c |  2 +-
 sound/soc/codecs/tas2780.c |  2 +-
 sound/soc/codecs/tas675x.c | 18 ++++++++---------
 5 files changed, 38 insertions(+), 38 deletions(-)

-- 
2.55.0

^ permalink raw reply	[flat|nested] 6+ messages in thread

* [PATCH 1/5] ASoC: pcm512x: sort the register default table
  2026-08-05 10:41 [PATCH 0/5] ASoC: TI codecs: sort the reg_defaults tables Peter Ujfalusi
@ 2026-08-05 10:41 ` Peter Ujfalusi
  2026-08-05 10:41 ` [PATCH 2/5] ASoC: tas2552: " Peter Ujfalusi
                   ` (3 subsequent siblings)
  4 siblings, 0 replies; 6+ messages in thread
From: Peter Ujfalusi @ 2026-08-05 10:41 UTC (permalink / raw)
  To: Mark Brown, Liam Girdwood, Shenghao Ding, Kevin Lu, Baojun Xu,
	Sen Wang
  Cc: linux-sound, stable

reg_defaults must be sorted by ascending register address, as
regcache_lookup_reg() locates entries in it with bsearch().  See commit
fd80df352ba1 ("regcache: Add support for sorting defaults arrays").

PCM512x_AUTO_MUTE (page 0, register 59) is listed before
PCM512x_ERROR_DETECT (page 0, register 37) and PCM512x_VCOM_CTRL_2
(page 1, register 9) is listed before the page 0 clocking block, so the
bsearch() descends into the wrong half of the table.  24 of the 45
entries are unreachable, among them every PLL coefficient and clock
divider default.  regcache_reg_needs_sync() then cannot compare them
against their default and reports that a sync is needed, so they are
written to the device on every regcache_sync() even when they were
never touched.

Sort the table by register address.

Fixes: 5a3af1293194 ("ASoC: pcm512x: Add PCM512x driver")
Cc: stable@vger.kernel.org
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
---
 sound/soc/codecs/pcm512x.c | 40 +++++++++++++++++++-------------------
 1 file changed, 20 insertions(+), 20 deletions(-)

diff --git a/sound/soc/codecs/pcm512x.c b/sound/soc/codecs/pcm512x.c
index fe3b5011fa16..03b1fcb1bf96 100644
--- a/sound/soc/codecs/pcm512x.c
+++ b/sound/soc/codecs/pcm512x.c
@@ -78,28 +78,10 @@ static const struct reg_default pcm512x_reg_defaults[] = {
 	{ PCM512x_POWER,             0x00 },
 	{ PCM512x_MUTE,              0x00 },
 	{ PCM512x_DSP,               0x00 },
-	{ PCM512x_PLL_REF,           0x00 },
-	{ PCM512x_DAC_REF,           0x00 },
-	{ PCM512x_DAC_ROUTING,       0x11 },
-	{ PCM512x_DSP_PROGRAM,       0x01 },
-	{ PCM512x_CLKDET,            0x00 },
-	{ PCM512x_AUTO_MUTE,         0x00 },
-	{ PCM512x_ERROR_DETECT,      0x00 },
-	{ PCM512x_DIGITAL_VOLUME_1,  0x00 },
-	{ PCM512x_DIGITAL_VOLUME_2,  0x30 },
-	{ PCM512x_DIGITAL_VOLUME_3,  0x30 },
-	{ PCM512x_DIGITAL_MUTE_1,    0x22 },
-	{ PCM512x_DIGITAL_MUTE_2,    0x00 },
-	{ PCM512x_DIGITAL_MUTE_3,    0x07 },
-	{ PCM512x_OUTPUT_AMPLITUDE,  0x00 },
-	{ PCM512x_ANALOG_GAIN_CTRL,  0x00 },
-	{ PCM512x_UNDERVOLTAGE_PROT, 0x00 },
-	{ PCM512x_ANALOG_MUTE_CTRL,  0x00 },
-	{ PCM512x_ANALOG_GAIN_BOOST, 0x00 },
-	{ PCM512x_VCOM_CTRL_1,       0x00 },
-	{ PCM512x_VCOM_CTRL_2,       0x01 },
 	{ PCM512x_BCLK_LRCLK_CFG,    0x00 },
 	{ PCM512x_MASTER_MODE,       0x7c },
+	{ PCM512x_PLL_REF,           0x00 },
+	{ PCM512x_DAC_REF,           0x00 },
 	{ PCM512x_GPIO_DACIN,        0x00 },
 	{ PCM512x_GPIO_PLLIN,        0x00 },
 	{ PCM512x_SYNCHRONIZE,       0x10 },
@@ -117,8 +99,26 @@ static const struct reg_default pcm512x_reg_defaults[] = {
 	{ PCM512x_FS_SPEED_MODE,     0x00 },
 	{ PCM512x_IDAC_1,            0x01 },
 	{ PCM512x_IDAC_2,            0x00 },
+	{ PCM512x_ERROR_DETECT,      0x00 },
 	{ PCM512x_I2S_1,             0x02 },
 	{ PCM512x_I2S_2,             0x00 },
+	{ PCM512x_DAC_ROUTING,       0x11 },
+	{ PCM512x_DSP_PROGRAM,       0x01 },
+	{ PCM512x_CLKDET,            0x00 },
+	{ PCM512x_AUTO_MUTE,         0x00 },
+	{ PCM512x_DIGITAL_VOLUME_1,  0x00 },
+	{ PCM512x_DIGITAL_VOLUME_2,  0x30 },
+	{ PCM512x_DIGITAL_VOLUME_3,  0x30 },
+	{ PCM512x_DIGITAL_MUTE_1,    0x22 },
+	{ PCM512x_DIGITAL_MUTE_2,    0x00 },
+	{ PCM512x_DIGITAL_MUTE_3,    0x07 },
+	{ PCM512x_OUTPUT_AMPLITUDE,  0x00 },
+	{ PCM512x_ANALOG_GAIN_CTRL,  0x00 },
+	{ PCM512x_UNDERVOLTAGE_PROT, 0x00 },
+	{ PCM512x_ANALOG_MUTE_CTRL,  0x00 },
+	{ PCM512x_ANALOG_GAIN_BOOST, 0x00 },
+	{ PCM512x_VCOM_CTRL_1,       0x00 },
+	{ PCM512x_VCOM_CTRL_2,       0x01 },
 };
 
 static bool pcm512x_readable(struct device *dev, unsigned int reg)
-- 
2.55.0


^ permalink raw reply related	[flat|nested] 6+ messages in thread

* [PATCH 2/5] ASoC: tas2552: sort the register default table
  2026-08-05 10:41 [PATCH 0/5] ASoC: TI codecs: sort the reg_defaults tables Peter Ujfalusi
  2026-08-05 10:41 ` [PATCH 1/5] ASoC: pcm512x: sort the register default table Peter Ujfalusi
@ 2026-08-05 10:41 ` Peter Ujfalusi
  2026-08-05 10:41 ` [PATCH 3/5] ASoC: tas2764: " Peter Ujfalusi
                   ` (2 subsequent siblings)
  4 siblings, 0 replies; 6+ messages in thread
From: Peter Ujfalusi @ 2026-08-05 10:41 UTC (permalink / raw)
  To: Mark Brown, Liam Girdwood, Shenghao Ding, Kevin Lu, Baojun Xu,
	Sen Wang
  Cc: linux-sound, stable

reg_defaults must be sorted by ascending register address, as
regcache_lookup_reg() locates entries in it with bsearch().  See commit
fd80df352ba1 ("regcache: Add support for sorting defaults arrays").

TAS2552_OUTPUT_DATA (0x07), TAS2552_PDM_CFG (0x11), TAS2552_PGA_GAIN
(0x12) and TAS2552_BOOST_APT_CTRL (0x14) are listed before
TAS2552_RESERVED_0D (0x0d), TAS2552_LIMIT_RATE_HYS (0x0e) and
TAS2552_CFG_2 (0x02), which leaves 7 of the 21 entries unreachable.
regcache_reg_needs_sync() then cannot compare them against their
default and reports that a sync is needed, so they are written to the
device on every regcache_sync() even when they were never touched.

Sort the table by register address.

Fixes: 5df7f71d5cdf ("ASoC: tas2552: Support TI TAS2552 Amplifier")
Cc: stable@vger.kernel.org
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
---
 sound/soc/codecs/tas2552.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/sound/soc/codecs/tas2552.c b/sound/soc/codecs/tas2552.c
index 1a7650b9b2a7..ea083d1cec2b 100644
--- a/sound/soc/codecs/tas2552.c
+++ b/sound/soc/codecs/tas2552.c
@@ -31,25 +31,25 @@
 
 static const struct reg_default tas2552_reg_defs[] = {
 	{TAS2552_CFG_1, 0x22},
+	{TAS2552_CFG_2, 0xef},
 	{TAS2552_CFG_3, 0x80},
 	{TAS2552_DOUT, 0x00},
-	{TAS2552_OUTPUT_DATA, 0xc0},
-	{TAS2552_PDM_CFG, 0x01},
-	{TAS2552_PGA_GAIN, 0x00},
-	{TAS2552_BOOST_APT_CTRL, 0x0f},
-	{TAS2552_RESERVED_0D, 0xbe},
-	{TAS2552_LIMIT_RATE_HYS, 0x08},
-	{TAS2552_CFG_2, 0xef},
 	{TAS2552_SER_CTRL_1, 0x00},
 	{TAS2552_SER_CTRL_2, 0x00},
+	{TAS2552_OUTPUT_DATA, 0xc0},
 	{TAS2552_PLL_CTRL_1, 0x10},
 	{TAS2552_PLL_CTRL_2, 0x00},
 	{TAS2552_PLL_CTRL_3, 0x00},
 	{TAS2552_BTIP, 0x8f},
 	{TAS2552_BTS_CTRL, 0x80},
+	{TAS2552_RESERVED_0D, 0xbe},
+	{TAS2552_LIMIT_RATE_HYS, 0x08},
 	{TAS2552_LIMIT_RELEASE, 0x04},
 	{TAS2552_LIMIT_INT_COUNT, 0x00},
+	{TAS2552_PDM_CFG, 0x01},
+	{TAS2552_PGA_GAIN, 0x00},
 	{TAS2552_EDGE_RATE_CTRL, 0x40},
+	{TAS2552_BOOST_APT_CTRL, 0x0f},
 	{TAS2552_VBAT_DATA, 0x00},
 };
 
-- 
2.55.0


^ permalink raw reply related	[flat|nested] 6+ messages in thread

* [PATCH 3/5] ASoC: tas2764: sort the register default table
  2026-08-05 10:41 [PATCH 0/5] ASoC: TI codecs: sort the reg_defaults tables Peter Ujfalusi
  2026-08-05 10:41 ` [PATCH 1/5] ASoC: pcm512x: sort the register default table Peter Ujfalusi
  2026-08-05 10:41 ` [PATCH 2/5] ASoC: tas2552: " Peter Ujfalusi
@ 2026-08-05 10:41 ` Peter Ujfalusi
  2026-08-05 10:41 ` [PATCH 4/5] ASoC: tas2780: " Peter Ujfalusi
  2026-08-05 10:41 ` [PATCH 5/5] ASoC: tas675x: " Peter Ujfalusi
  4 siblings, 0 replies; 6+ messages in thread
From: Peter Ujfalusi @ 2026-08-05 10:41 UTC (permalink / raw)
  To: Mark Brown, Liam Girdwood, Shenghao Ding, Kevin Lu, Baojun Xu,
	Sen Wang
  Cc: linux-sound, stable

reg_defaults must be sorted by ascending register address, as
regcache_lookup_reg() locates entries in it with bsearch().  See commit
fd80df352ba1 ("regcache: Add support for sorting defaults arrays").

TAS2764_DVC (0x1a) is listed before TAS2764_CHNL_0 (0x03), which makes
it unreachable.  regcache_reg_needs_sync() then cannot compare it
against its default and reports that a sync is needed, so it is written
to the device on every regcache_sync() even when it was never touched.

Sort the table by register address.

Fixes: 827ed8a0fa50 ("ASoC: tas2764: Add the driver for the TAS2764")
Cc: stable@vger.kernel.org
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
---
 sound/soc/codecs/tas2764.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/tas2764.c b/sound/soc/codecs/tas2764.c
index b11b998aa32a..f9c65c9f6d0a 100644
--- a/sound/soc/codecs/tas2764.c
+++ b/sound/soc/codecs/tas2764.c
@@ -897,13 +897,13 @@ static const struct reg_default tas2764_reg_defaults[] = {
 	{ TAS2764_PAGE, 0x00 },
 	{ TAS2764_SW_RST, 0x00 },
 	{ TAS2764_PWR_CTRL, 0x1a },
-	{ TAS2764_DVC, 0x00 },
 	{ TAS2764_CHNL_0, 0x28 },
 	{ TAS2764_TDM_CFG0, 0x09 },
 	{ TAS2764_TDM_CFG1, 0x02 },
 	{ TAS2764_TDM_CFG2, 0x0a },
 	{ TAS2764_TDM_CFG3, 0x10 },
 	{ TAS2764_TDM_CFG5, 0x42 },
+	{ TAS2764_DVC, 0x00 },
 	{ TAS2764_INT_CLK_CFG, 0x19 },
 };
 
-- 
2.55.0


^ permalink raw reply related	[flat|nested] 6+ messages in thread

* [PATCH 4/5] ASoC: tas2780: sort the register default table
  2026-08-05 10:41 [PATCH 0/5] ASoC: TI codecs: sort the reg_defaults tables Peter Ujfalusi
                   ` (2 preceding siblings ...)
  2026-08-05 10:41 ` [PATCH 3/5] ASoC: tas2764: " Peter Ujfalusi
@ 2026-08-05 10:41 ` Peter Ujfalusi
  2026-08-05 10:41 ` [PATCH 5/5] ASoC: tas675x: " Peter Ujfalusi
  4 siblings, 0 replies; 6+ messages in thread
From: Peter Ujfalusi @ 2026-08-05 10:41 UTC (permalink / raw)
  To: Mark Brown, Liam Girdwood, Shenghao Ding, Kevin Lu, Baojun Xu,
	Sen Wang
  Cc: linux-sound, stable

reg_defaults must be sorted by ascending register address, as
regcache_lookup_reg() locates entries in it with bsearch().  See commit
fd80df352ba1 ("regcache: Add support for sorting defaults arrays").

TAS2780_DVC (0x1a) is listed before TAS2780_CHNL_0 (0x03), which makes
it unreachable.  regcache_reg_needs_sync() then cannot compare it
against its default and reports that a sync is needed, so it is written
to the device on every regcache_sync() even when it was never touched.

Sort the table by register address.

Fixes: eae9f9ce181b ("ASoC: add tas2780 driver")
Cc: stable@vger.kernel.org
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
---
 sound/soc/codecs/tas2780.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/tas2780.c b/sound/soc/codecs/tas2780.c
index 1ec1c076204f..f1fce4305fa1 100644
--- a/sound/soc/codecs/tas2780.c
+++ b/sound/soc/codecs/tas2780.c
@@ -527,13 +527,13 @@ static const struct reg_default tas2780_reg_defaults[] = {
 	{ TAS2780_PAGE, 0x00 },
 	{ TAS2780_SW_RST, 0x00 },
 	{ TAS2780_PWR_CTRL, 0x1a },
-	{ TAS2780_DVC, 0x00 },
 	{ TAS2780_CHNL_0, 0x00 },
 	{ TAS2780_TDM_CFG0, 0x09 },
 	{ TAS2780_TDM_CFG1, 0x02 },
 	{ TAS2780_TDM_CFG2, 0x0a },
 	{ TAS2780_TDM_CFG3, 0x10 },
 	{ TAS2780_TDM_CFG5, 0x42 },
+	{ TAS2780_DVC, 0x00 },
 };
 
 static const struct regmap_range_cfg tas2780_regmap_ranges[] = {
-- 
2.55.0


^ permalink raw reply related	[flat|nested] 6+ messages in thread

* [PATCH 5/5] ASoC: tas675x: sort the register default table
  2026-08-05 10:41 [PATCH 0/5] ASoC: TI codecs: sort the reg_defaults tables Peter Ujfalusi
                   ` (3 preceding siblings ...)
  2026-08-05 10:41 ` [PATCH 4/5] ASoC: tas2780: " Peter Ujfalusi
@ 2026-08-05 10:41 ` Peter Ujfalusi
  4 siblings, 0 replies; 6+ messages in thread
From: Peter Ujfalusi @ 2026-08-05 10:41 UTC (permalink / raw)
  To: Mark Brown, Liam Girdwood, Shenghao Ding, Kevin Lu, Baojun Xu,
	Sen Wang
  Cc: linux-sound, stable

reg_defaults must be sorted by ascending register address, as
regcache_lookup_reg() locates entries in it with bsearch().  See commit
fd80df352ba1 ("regcache: Add support for sorting defaults arrays").

TAS675X_AC_LDG_CTRL_REG (0xb5), TAS675X_TWEETER_DETECT_CTRL_REG (0xb6),
TAS675X_TWEETER_DETECT_THRESH_REG (0xb7) and TAS675X_AC_LDG_FREQ_CTRL_REG
(0xb8) are listed before the 0x7c - 0xa0 block, which leaves 14 of the
69 entries unreachable.  regcache_reg_needs_sync() then cannot compare
them against their default and reports that a sync is needed, so they
are written to the device on every regcache_sync() even when they were
never touched.

Sort the table by register address.

Fixes: 133c81f84471 ("ASoC: codecs: Add TAS67524 quad-channel audio amplifier driver")
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
---
 sound/soc/codecs/tas675x.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/sound/soc/codecs/tas675x.c b/sound/soc/codecs/tas675x.c
index 82526362de7b..404706b62156 100644
--- a/sound/soc/codecs/tas675x.c
+++ b/sound/soc/codecs/tas675x.c
@@ -1924,15 +1924,6 @@ static const struct reg_default tas675x_reg_defaults[] = {
 	{ TAS675X_PWM_PHASE_M_CTRL_CH2_REG, 0x00 },
 	{ TAS675X_PWM_PHASE_M_CTRL_CH3_REG, 0x00 },
 	{ TAS675X_PWM_PHASE_M_CTRL_CH4_REG, 0x00 },
-	{ TAS675X_DC_LDG_CTRL_REG,         0x00 },
-	{ TAS675X_DC_LDG_LO_CTRL_REG,      0x00 },
-	{ TAS675X_DC_LDG_TIME_CTRL_REG,    0x00 },
-	{ TAS675X_DC_LDG_SL_CH1_CH2_CTRL_REG, 0x11 },
-	{ TAS675X_DC_LDG_SL_CH3_CH4_CTRL_REG, 0x11 },
-	{ TAS675X_AC_LDG_CTRL_REG,         0x10 },
-	{ TAS675X_TWEETER_DETECT_CTRL_REG, 0x08 },
-	{ TAS675X_TWEETER_DETECT_THRESH_REG, 0x00 },
-	{ TAS675X_AC_LDG_FREQ_CTRL_REG,    0xC8 },
 	{ TAS675X_REPORT_ROUTING_1_REG,    0x00 },
 	{ TAS675X_OTSD_RECOVERY_EN_REG,    0x00 },
 	{ TAS675X_REPORT_ROUTING_2_REG,    0xA2 },
@@ -1943,6 +1934,15 @@ static const struct reg_default tas675x_reg_defaults[] = {
 	{ TAS675X_GPIO1_OUTPUT_SEL_REG,    0x00 },
 	{ TAS675X_GPIO2_OUTPUT_SEL_REG,    0x00 },
 	{ TAS675X_GPIO_CTRL_REG,           TAS675X_GPIO_CTRL_RSTVAL },
+	{ TAS675X_DC_LDG_CTRL_REG,         0x00 },
+	{ TAS675X_DC_LDG_LO_CTRL_REG,      0x00 },
+	{ TAS675X_DC_LDG_TIME_CTRL_REG,    0x00 },
+	{ TAS675X_DC_LDG_SL_CH1_CH2_CTRL_REG, 0x11 },
+	{ TAS675X_DC_LDG_SL_CH3_CH4_CTRL_REG, 0x11 },
+	{ TAS675X_AC_LDG_CTRL_REG,         0x10 },
+	{ TAS675X_TWEETER_DETECT_CTRL_REG, 0x08 },
+	{ TAS675X_TWEETER_DETECT_THRESH_REG, 0x00 },
+	{ TAS675X_AC_LDG_FREQ_CTRL_REG,    0xC8 },
 	{ TAS675X_OTW_CTRL_CH1_CH2_REG,    0x11 },
 	{ TAS675X_OTW_CTRL_CH3_CH4_REG,    0x11 },
 };
-- 
2.55.0


^ permalink raw reply related	[flat|nested] 6+ messages in thread

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Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-08-05 10:41 [PATCH 0/5] ASoC: TI codecs: sort the reg_defaults tables Peter Ujfalusi
2026-08-05 10:41 ` [PATCH 1/5] ASoC: pcm512x: sort the register default table Peter Ujfalusi
2026-08-05 10:41 ` [PATCH 2/5] ASoC: tas2552: " Peter Ujfalusi
2026-08-05 10:41 ` [PATCH 3/5] ASoC: tas2764: " Peter Ujfalusi
2026-08-05 10:41 ` [PATCH 4/5] ASoC: tas2780: " Peter Ujfalusi
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