47 lines
1.5 KiB
Diff
47 lines
1.5 KiB
Diff
From e56e5793431c39f606a475035086323ae6249b76 Mon Sep 17 00:00:00 2001
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From: Ondrej Jirman <megi@xff.cz>
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Date: Mon, 15 Aug 2022 02:23:37 +0200
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Subject: [PATCH 362/464] ASoC: rockchip: Fix doubling of playback speed after
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system sleep
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There is some issue with CRU on RK3399 that can be reproduced by:
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- playing some audio and stopping the playback (so that runtime PM suspends I2S)
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- putting system to deep sleep and resuming it (using mainline TF-A)
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- playing some audio (audio plays at 2x the normal speed)
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If the audio is kept playing during system sleep cycle, the issue
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does not manifest. Relevant registers in CRU are identical in bug/
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no-bug scenarios, so this patch is just touching the CRU registers
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without actually changing anything in the end. Touching the registers
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fixes the playback speed, though.
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Inspired by: https://github.com/djselbeck/linux/commit/cb4be5dec3fa18c4b344c11fed3fc57aa3bea424
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Signed-off-by: Ondrej Jirman <megi@xff.cz>
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---
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sound/soc/rockchip/rockchip_i2s.c | 7 +++++++
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1 file changed, 7 insertions(+)
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diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c
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index 575a0b9b01e9..aff3d9a21cf7 100644
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--- a/sound/soc/rockchip/rockchip_i2s.c
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+++ b/sound/soc/rockchip/rockchip_i2s.c
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@@ -115,6 +115,13 @@ static int i2s_runtime_resume(struct device *dev)
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if (ret)
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clk_disable_unprepare(i2s->mclk);
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+ if (ret == 0) {
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+ unsigned long rate = clk_get_rate(i2s->mclk);
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+
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+ clk_set_rate(i2s->mclk, rate - 1);
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+ clk_set_rate(i2s->mclk, rate);
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+ }
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+
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return ret;
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}
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--
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2.34.1
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