This is a note to let you know that I've just added the patch titled
arm64: dts: qcom: msm8916: Fix Secondary MI2S bit clock
to the 5.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm64-dts-qcom-msm8916-fix-secondary-mi2s-bit-clock.patch
and it can be found in the queue-5.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 147315dec7a8be9223b449a762cfc3f815d41f03
Author: Stephan Gerhold <stephan@xxxxxxxxxxx>
Date: Mon Aug 16 20:18:10 2021 +0200
arm64: dts: qcom: msm8916: Fix Secondary MI2S bit clock
[ Upstream commit 8199a0b31e76d158ac14841e7119890461f8c595 ]
At the moment, playing audio on Secondary MI2S will just end up getting
stuck, without actually playing any audio. This happens because the wrong
bit clock is configured when playing audio on Secondary MI2S.
The PRI_I2S_CLK (better name: SPKR_I2S_CLK) is used by the SPKR audio mux
block that provides both Primary and Secondary MI2S.
The SEC_I2S_CLK (better name: MIC_I2S_CLK) is used by the MIC audio mux
block that provides Tertiary MI2S. Quaternary MI2S is also part of the
MIC audio mux but has its own clock (AUX_I2S_CLK).
This means that (quite confusingly) the SEC_I2S_CLK is not actually
used for Secondary MI2S as the name would suggest. Secondary MI2S
needs to have the same clock as Primary MI2S configured.
Fix the clock list for the lpass node in the device tree and add
a comment to clarify this confusing naming. With these changes,
audio can be played correctly on Secondary MI2S.
Cc: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
Fixes: 3761a3618f55 ("arm64: dts: qcom: add lpass node")
Tested-by: Vincent Knecht <vincent.knecht@xxxxxxxxxx>
Signed-off-by: Stephan Gerhold <stephan@xxxxxxxxxxx>
Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210816181810.2242-1-stephan@xxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/arm64/boot/dts/qcom/msm8916.dtsi b/arch/arm64/boot/dts/qcom/msm8916.dtsi
index 4f06c0a9c4252..7718c7f25aba9 100644
--- a/arch/arm64/boot/dts/qcom/msm8916.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8916.dtsi
@@ -1357,11 +1357,17 @@
lpass: audio-controller@7708000 {
status = "disabled";
compatible = "qcom,lpass-cpu-apq8016";
+
+ /*
+ * Note: Unlike the name would suggest, the SEC_I2S_CLK
+ * is actually only used by Tertiary MI2S while
+ * Primary/Secondary MI2S both use the PRI_I2S_CLK.
+ */
clocks = <&gcc GCC_ULTAUDIO_AHBFABRIC_IXFABRIC_CLK>,
<&gcc GCC_ULTAUDIO_PCNOC_MPORT_CLK>,
<&gcc GCC_ULTAUDIO_PCNOC_SWAY_CLK>,
<&gcc GCC_ULTAUDIO_LPAIF_PRI_I2S_CLK>,
- <&gcc GCC_ULTAUDIO_LPAIF_SEC_I2S_CLK>,
+ <&gcc GCC_ULTAUDIO_LPAIF_PRI_I2S_CLK>,
<&gcc GCC_ULTAUDIO_LPAIF_SEC_I2S_CLK>,
<&gcc GCC_ULTAUDIO_LPAIF_AUX_I2S_CLK>;
