This is a note to let you know that I've just added the patch titled
ASoC: imx-card: Fix DSD/PDM mclk frequency
to the 5.18-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:
asoc-imx-card-fix-dsd-pdm-mclk-frequency.patch
and it can be found in the queue-5.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit a5fd6c5560694895f832112ec9d34ea60b170224
Author: Shengjiu Wang <shengjiu.wang@xxxxxxx>
Date: Wed Jul 6 17:42:55 2022 +0800
ASoC: imx-card: Fix DSD/PDM mclk frequency
[ Upstream commit c0fabd12a8570cb932f13d9388f3d887ad44369b ]
The DSD/PDM rate not only DSD64/128/256/512, which are the
multiple rate of 44.1kHz, but also support the multiple
rate of 8kHz, so can't force all mclk frequency to be
22579200Hz, need to assign the frequency according to
rate.
Fixes: aa736700f42f ("ASoC: imx-card: Add imx-card machine driver")
Signed-off-by: Shengjiu Wang <shengjiu.wang@xxxxxxx>
Link: https://lore.kernel.org/r/1657100575-8261-1-git-send-email-shengjiu.wang@xxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/sound/soc/fsl/imx-card.c b/sound/soc/fsl/imx-card.c
index 6f8efd838fcc..c0eb218a254b 100644
--- a/sound/soc/fsl/imx-card.c
+++ b/sound/soc/fsl/imx-card.c
@@ -17,6 +17,9 @@
#include "fsl_sai.h"
+#define IMX_CARD_MCLK_22P5792MHZ 22579200
+#define IMX_CARD_MCLK_24P576MHZ 24576000
+
enum codec_type {
CODEC_DUMMY = 0,
CODEC_AK5558 = 1,
@@ -353,9 +356,14 @@ static int imx_aif_hw_params(struct snd_pcm_substream *substream,
mclk_freq = akcodec_get_mclk_rate(substream, params, slots, slot_width);
else
mclk_freq = params_rate(params) * slots * slot_width;
- /* Use the maximum freq from DSD512 (512*44100 = 22579200) */
- if (format_is_dsd(params))
- mclk_freq = 22579200;
+
+ if (format_is_dsd(params)) {
+ /* Use the maximum freq from DSD512 (512*44100 = 22579200) */
+ if (!(params_rate(params) % 11025))
+ mclk_freq = IMX_CARD_MCLK_22P5792MHZ;
+ else
+ mclk_freq = IMX_CARD_MCLK_24P576MHZ;
+ }
ret = snd_soc_dai_set_sysclk(cpu_dai, link_data->cpu_sysclk_id, mclk_freq,
SND_SOC_CLOCK_OUT);
