FAILED: patch "[PATCH] ASoC: pcm512x: sort the register default table" failed to apply to 5.10-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 5.10-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y
git checkout FETCH_HEAD
git cherry-pick -x 767d9ae714e3e9b0ae86237c410fbfca7056570a
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026090937-awry-woven-fb0a@gregkh' --subject-prefix 'PATCH 5.10.y' 'HEAD^..'

Possible dependencies:



thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 767d9ae714e3e9b0ae86237c410fbfca7056570a Mon Sep 17 00:00:00 2001
From: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Date: Wed, 5 Aug 2026 13:41:45 +0300
Subject: [PATCH] ASoC: pcm512x: sort the register default table

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>
Link: https://patch.msgid.link/20260805104149.9795-2-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

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)