[PATCH v2] ASoC: rt1320: make SRAM registers readable to stop being cached

[PATCH v2] ASoC: rt1320: make SRAM registers readable to stop being cached

[jack.yu]

From: Jack Yu <jack.yu@realtek.com>

rt1320_volatile_register() marks the SRAM ranges 0x10000000-0x10008fff
and 0x1000c000-0x1000dfff as volatile, but regmap only honors that flag
for a readable register and these ranges were missing from
 rt1320_readable_register(). They were therefore cached at probe and
replayed over SoundWire on every runtime resume, delaying the
first PCM open after autosuspend by about a second.

Make the ranges readable so the volatile flag takes effect and the SRAM
is no longer cached. Exclude 0x1000d000-0x1000d7ff from both callbacks,
since rt1320_rae_load() deliberately caches that tuning-tool window.

Signed-off-by: Jack Yu <jack.yu@realtek.com>
---
 sound/soc/codecs/rt1320-sdw.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/sound/soc/codecs/rt1320-sdw.c b/sound/soc/codecs/rt1320-sdw.c
index b13622e54ae0..fa89db096651 100644
--- a/sound/soc/codecs/rt1320-sdw.c
+++ b/sound/soc/codecs/rt1320-sdw.c
@@ -890,8 +890,9 @@ static bool rt1320_readable_register(struct device *dev, unsigned int reg)
 	case 0xf01e:
 	case 0xf717 ... 0xf719:
 	case 0xf720 ... 0xf723:
-	case 0x1000cd91 ... 0x1000cd96:
-	case RT1321_PATCH_MAIN_VER ... RT1321_PATCH_BETA_VER:
+	case 0x10000000 ... 0x10008fff:
+	case 0x1000c000 ... 0x1000cfff:
+	case 0x1000d800 ... 0x1000dfff:
 	case 0x1000f008:
 	case 0x1000f021:
 	case 0x20003000 ... 0x2000300f:
@@ -996,7 +997,8 @@ static bool rt1320_volatile_register(struct device *dev, unsigned int reg)
 	case 0xf717 ... 0xf719:
 	case 0xf720 ... 0xf723:
 	case 0x10000000 ... 0x10008fff:
-	case 0x1000c000 ... 0x1000dfff:
+	case 0x1000c000 ... 0x1000cfff:
+	case 0x1000d800 ... 0x1000dfff:
 	case 0x1000f008:
 	case 0x1000f021:
 	case 0x2000300e ... 0x2000300f:
-- 
2.55.0

Re: [PATCH v2] ASoC: rt1320: make SRAM registers readable to stop being cached

[Mark Brown]

On Thu, 24 Sep 2026 10:05:10 +0800, jack.yu@realtek.com wrote:
> ASoC: rt1320: make SRAM registers readable to stop being cached

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-7.4

Thanks!

[1/1] ASoC: rt1320: make SRAM registers readable to stop being cached
      https://git.kernel.org/broonie/sound/c/eb169cc54b87

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark