github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-24 15:12:13 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

arm64: dts: rockchip: set codec system-clock-fixed on px30-ringneck-haikou

Browse Source 
Having sgtl5000_clk defines as "fixed-clock" is not enough to prevent
the dai subsystem from overwriting the frequency via sgtl5000_set_dai_sysclk.

Setting system-clock-fixed does the job, and now a 1kHz sine wave
comes out as actually 1kHz, no matter the sample rate of the source.

Testcase: These should sound the same:

 speaker-test -r 48000 -t sine -f 1000
 speaker-test -r 24000 -t sine -f 1000

Also remove the clock link here as having it in sgtl5000 and
sgtl5000_codec causes duplicate clock unprepares with associated
backtrace.

Cc: stable@vger.kernel.org
Fixes: c484cf93f6 ("arm64: dts: rockchip: add PX30-µQ7 (Ringneck) SoM with Haikou baseboard")
Signed-off-by: Jakob Unterwurzacher <jakob.unterwurzacher@theobroma-systems.com>
Link: https://lore.kernel.org/r/20230907151725.198347-2-jakob.unterwurzacher@theobroma-systems.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
Jakob Unterwurzacher 2023-09-07 17:17:16 +02:00 committed by Heiko Stuebner
parent 84fa1865ed
commit 1e585cd0aa
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm64/boot/dts/rockchip/px30-ringneck-haikou.dts
View File

@ -72,8 +72,10 @@ i2s0-sound {
simple-audio-card,bitclock-master = <&sgtl5000_codec>;
sgtl5000_codec: simple-audio-card,codec {
clocks = <&sgtl5000_clk>;
sound-dai = <&sgtl5000>;
// Prevent the dai subsystem from overwriting the clock
// frequency. We are using a fixed-frequency oscillator.
system-clock-fixed;
};
simple-audio-card,cpu {