ASoC: rockchip: i2s-tdm: Fix trcm mode by setting clock on right mclk
Subsystems (4)
PATCH 1/1 ASoC: rockchip: i2s-tdm: Fix trcm mode by setting clock on right mclk
When TRCM mode is enabled, I2S RX and TX clocks are synchronized through selected clock source. Without this fix BCLK and LRCK might get parented to an uninitialized MCLK and the DAI will receive data at wrong pace.
However, unlike in original i2s-tdm driver, there is no need to manually synchronize mclk_rx and mclk_tx, as only one gets used anyway.
Tested on a board with RK3568 SoC and Silergy SY24145S codec with enabled and disabled TRCM mode.
--- sound/soc/rockchip/rockchip_i2s_tdm.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-)
sound/soc/rockchip/rockchip_i2s_tdm.c +11 -2
@@ -655,8 +655,17 @@ static int rockchip_i2s_tdm_hw_params(struct snd_pcm_substream *substream,int err;if (i2s_tdm->is_master_mode) { -struct clk *mclk = (substream->stream ==SNDRV_PCM_STREAM_PLAYBACK ) ? - i2s_tdm->mclk_tx : i2s_tdm->mclk_rx; +struct clk *mclk; + +if (i2s_tdm->clk_trcm ==TRCM_TX ) { + mclk = i2s_tdm->mclk_tx; + }else if (i2s_tdm->clk_trcm ==TRCM_RX ) { + mclk = i2s_tdm->mclk_rx; + }else if (substream->stream ==SNDRV_PCM_STREAM_PLAYBACK ) { + mclk = i2s_tdm->mclk_tx; + }else { + mclk = i2s_tdm->mclk_rx; + } err =clk_set_rate (mclk,DEFAULT_MCLK_FS *params_rate (params));if (err)
Signature · 1 line
2.34.1
Hello Alibek,
Quoted 27 lines · On Tue, 4 Jun 2024 21:47:52 +0300 Alibek Omarov <[email protected]> wrote:
When TRCM mode is enabled, I2S RX and TX clocks are synchronized through selected clock source. Without this fix BCLK and LRCK might get parented to an uninitialized MCLK and the DAI will receive data at wrong pace.
However, unlike in original i2s-tdm driver, there is no need to manually synchronize
mclk_rxandmclk_tx, as only one gets used anyway.Tested on a board with RK3568 SoC and Silergy SY24145S codec with enabled and disabled TRCM mode.
Fixes 9e2ab4b18ebd ("ASoC: rockchip: i2s-tdm: Fix inaccurate sampling rates")Signed-off-by Alibek Omarov <[email protected]>--- sound/soc/rockchip/rockchip_i2s_tdm.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-)sound/soc/rockchip/rockchip_i2s_tdm.c +1
-2@@ -655,8 +655,17 @@ static int rockchip_i2s_tdm_hw_params(struct snd_pcm_substream *substream,int err;if (i2s_tdm->is_master_mode) { -struct clk *mclk = (substream->stream ==SNDRV_PCM_STREAM_PLAYBACK ) ? - i2s_tdm->mclk_tx : i2s_tdm->mclk_rx; +struct clk *mclk;
sound/soc/rockchip/rockchip_i2s_tdm.c static int rockchip_i2s_tdm_hw_params(struct snd_pcm_substream *substream, · line 668
Quoted 10 lines
sound/soc/rockchip/rockchip_i2s_tdm.c +10
-0+ +if (i2s_tdm->clk_trcm ==TRCM_TX ) { + mclk = i2s_tdm->mclk_tx; + }else if (i2s_tdm->clk_trcm ==TRCM_RX ) { + mclk = i2s_tdm->mclk_rx; + }else if (substream->stream ==SNDRV_PCM_STREAM_PLAYBACK ) { + mclk = i2s_tdm->mclk_tx; + }else { + mclk = i2s_tdm->mclk_rx; + }
I cannot test right now, but it definitely looks correct.
Signature · 3 lines
Luca Ceresoli, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
Quoted 5 lines
I cannot test right now, but it definitely looks correct.
Reviewed-by Luca Ceresoli <[email protected]>
Thank you very much!
Mark Brown
maintainerQuoted 8 lines · Alibek Omarov
When TRCM mode is enabled, I2S RX and TX clocks are synchronized through selected clock source. Without this fix BCLK and LRCK might get parented to an uninitialized MCLK and the DAI will receive data at wrong pace.
However, unlike in original i2s-tdm driver, there is no need to manually synchronize
mclk_rxandmclk_tx, as only one gets used anyway.[...]
Applied to
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
Thanks!
[1/1] ASoC: rockchip: i2s-tdm: Fix trcm mode by setting clock on right mclk
commit: ccd8d753f0fe8f16745fa2b6be5946349731d901
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.
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Thanks,
Mark