[PATCH] Revert "ASoC: rockchip: i2s_tdm: Re-add the set_sysclk callback"

[Luca Ceresoli]

This reverts commit 5323186e2e8d33c073fad51e24f18e2d6dbae2da.

The reverted commit broke this driver for the RK3308 I2S.

The 'arecord -Vmono -d 2 -c 8 -f S16_LE -r 96000 /dev/null' command on
RK3308 now results in:

  rockchip-i2s-tdm ff320000.i2s: ASoC error (-22): at snd_soc_dai_hw_params() on ff320000.i2s
   ff320000.i2s-rk3308-hifi: ASoC error (-22): at __soc_pcm_hw_params() on ff320000.i2s-rk3308-hifi

Tested on:

 * Radxa Rock Pi S
 * Upstream Linux kernel
 * arm64 defconfig

Tested kernel versions:

 * v6.12: OK
 * 5323186e2e8d (commit being reverted): FAIL
 * 5323186e2e8d^: OK
 * 21cfbeae7d7c (commit being reverted, on stable/linux-6.12.y): FAIL
 * 21cfbeae7d7c^: OK
 * v6.19: FAIL
 * v6.19 + 'git revert 5323186e2e8d': OK
 * v6.19-11566-g254edc893f3a (current master as of today): FAIL
 * v6.19-11566-g254edc893f3a (current master as of today) + this revert: OK

Fixes: 5323186e2e8d ("ASoC: rockchip: i2s_tdm: Re-add the set_sysclk callback")
Cc: stable at vger.kernel.org
Link: https://lore.kernel.org/lkml/DGB6VK7LC8N7.322SYGWZXPL5W@bootlin.com/
Signed-off-by: Luca Ceresoli <luca.ceresoli at bootlin.com>
---
 sound/soc/rockchip/rockchip_i2s_tdm.c | 31 ++-----------------------------
 1 file changed, 2 insertions(+), 29 deletions(-)

diff --git a/sound/soc/rockchip/rockchip_i2s_tdm.c b/sound/soc/rockchip/rockchip_i2s_tdm.c
index 770b9bfbb384..b056d72e61ff 100644
--- a/sound/soc/rockchip/rockchip_i2s_tdm.c
+++ b/sound/soc/rockchip/rockchip_i2s_tdm.c
@@ -22,6 +22,7 @@
 
 #define DRV_NAME "rockchip-i2s-tdm"
 
+#define DEFAULT_MCLK_FS				256
 #define CH_GRP_MAX				4  /* The max channel 8 / 2 */
 #define MULTIPLEX_CH_MAX			10
 
@@ -69,8 +70,6 @@ struct rk_i2s_tdm_dev {
 	bool has_playback;
 	bool has_capture;
 	struct snd_soc_dai_driver *dai;
-	unsigned int mclk_rx_freq;
-	unsigned int mclk_tx_freq;
 };
 
 static int to_ch_num(unsigned int val)
@@ -618,27 +617,6 @@ static int rockchip_i2s_trcm_mode(struct snd_pcm_substream *substream,
 	return 0;
 }
 
-static int rockchip_i2s_tdm_set_sysclk(struct snd_soc_dai *cpu_dai, int stream,
-				       unsigned int freq, int dir)
-{
-	struct rk_i2s_tdm_dev *i2s_tdm = to_info(cpu_dai);
-
-	if (i2s_tdm->clk_trcm) {
-		i2s_tdm->mclk_tx_freq = freq;
-		i2s_tdm->mclk_rx_freq = freq;
-	} else {
-		if (stream == SNDRV_PCM_STREAM_PLAYBACK)
-			i2s_tdm->mclk_tx_freq = freq;
-		else
-			i2s_tdm->mclk_rx_freq = freq;
-	}
-
-	dev_dbg(i2s_tdm->dev, "The target mclk_%s freq is: %d\n",
-		stream ? "rx" : "tx", freq);
-
-	return 0;
-}
-
 static int rockchip_i2s_tdm_hw_params(struct snd_pcm_substream *substream,
 				      struct snd_pcm_hw_params *params,
 				      struct snd_soc_dai *dai)
@@ -653,19 +631,15 @@ static int rockchip_i2s_tdm_hw_params(struct snd_pcm_substream *substream,
 
 		if (i2s_tdm->clk_trcm == TRCM_TX) {
 			mclk = i2s_tdm->mclk_tx;
-			mclk_rate = i2s_tdm->mclk_tx_freq;
 		} else if (i2s_tdm->clk_trcm == TRCM_RX) {
 			mclk = i2s_tdm->mclk_rx;
-			mclk_rate = i2s_tdm->mclk_rx_freq;
 		} else if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 			mclk = i2s_tdm->mclk_tx;
-			mclk_rate = i2s_tdm->mclk_tx_freq;
 		} else {
 			mclk = i2s_tdm->mclk_rx;
-			mclk_rate = i2s_tdm->mclk_rx_freq;
 		}
 
-		err = clk_set_rate(mclk, mclk_rate);
+		err = clk_set_rate(mclk, DEFAULT_MCLK_FS * params_rate(params));
 		if (err)
 			return err;
 
@@ -825,7 +799,6 @@ static const struct snd_soc_dai_ops rockchip_i2s_tdm_dai_ops = {
 	.hw_params = rockchip_i2s_tdm_hw_params,
 	.set_bclk_ratio	= rockchip_i2s_tdm_set_bclk_ratio,
 	.set_fmt = rockchip_i2s_tdm_set_fmt,
-	.set_sysclk = rockchip_i2s_tdm_set_sysclk,
 	.set_tdm_slot = rockchip_dai_tdm_slot,
 	.trigger = rockchip_i2s_tdm_trigger,
 };

---
base-commit: 2961f841b025fb234860bac26dfb7fa7cb0fb122
change-id: 20260218-snd-rk3308-i2s-revert-set_sysclk-ed09c6914e1b

Best regards,
-- 
Luca Ceresoli <luca.ceresoli at bootlin.com>