This is a note to let you know that I've just added the patch titled
ASoC: fsl_micfil: Add sample rate constraint
to the 6.6-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-fsl_micfil-add-sample-rate-constraint.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 2e3d91f55349c1c9d4a6bf25fc55cce13ae705ff
Author: Shengjiu Wang <shengjiu.wang@xxxxxxx>
Date: Mon Oct 14 13:38:33 2024 +0800
ASoC: fsl_micfil: Add sample rate constraint
[ Upstream commit b9a8ecf81066e01e8a3de35517481bc5aa0439e5 ]
On some platforms, for example i.MX93, there is only one
audio PLL source, so some sample rate can't be supported.
If the PLL source is used for 8kHz series rates, then 11kHz
series rates can't be supported.
So add constraints according to the frequency of available
clock sources, then alsa-lib will help to convert the
unsupported rate for the driver.
Signed-off-by: Shengjiu Wang <shengjiu.wang@xxxxxxx>
Link: https://patch.msgid.link/1728884313-6778-1-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/fsl_micfil.c b/sound/soc/fsl/fsl_micfil.c
index 9407179af5d57..8478a4ac59f9d 100644
--- a/sound/soc/fsl/fsl_micfil.c
+++ b/sound/soc/fsl/fsl_micfil.c
@@ -28,6 +28,13 @@
#define MICFIL_OSR_DEFAULT 16
+#define MICFIL_NUM_RATES 7
+#define MICFIL_CLK_SRC_NUM 3
+/* clock source ids */
+#define MICFIL_AUDIO_PLL1 0
+#define MICFIL_AUDIO_PLL2 1
+#define MICFIL_CLK_EXT3 2
+
enum quality {
QUALITY_HIGH,
QUALITY_MEDIUM,
@@ -45,9 +52,12 @@ struct fsl_micfil {
struct clk *mclk;
struct clk *pll8k_clk;
struct clk *pll11k_clk;
+ struct clk *clk_src[MICFIL_CLK_SRC_NUM];
struct snd_dmaengine_dai_dma_data dma_params_rx;
struct sdma_peripheral_config sdmacfg;
struct snd_soc_card *card;
+ struct snd_pcm_hw_constraint_list constraint_rates;
+ unsigned int constraint_rates_list[MICFIL_NUM_RATES];
unsigned int dataline;
char name[32];
int irq[MICFIL_IRQ_LINES];
@@ -475,12 +485,34 @@ static int fsl_micfil_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct fsl_micfil *micfil = snd_soc_dai_get_drvdata(dai);
+ unsigned int rates[MICFIL_NUM_RATES] = {8000, 11025, 16000, 22050, 32000, 44100, 48000};
+ int i, j, k = 0;
+ u64 clk_rate;
if (!micfil) {
dev_err(dai->dev, "micfil dai priv_data not set\n");
return -EINVAL;
}
+ micfil->constraint_rates.list = micfil->constraint_rates_list;
+ micfil->constraint_rates.count = 0;
+
+ for (j = 0; j < MICFIL_NUM_RATES; j++) {
+ for (i = 0; i < MICFIL_CLK_SRC_NUM; i++) {
+ clk_rate = clk_get_rate(micfil->clk_src[i]);
+ if (clk_rate != 0 && do_div(clk_rate, rates[j]) == 0) {
+ micfil->constraint_rates_list[k++] = rates[j];
+ micfil->constraint_rates.count++;
+ break;
+ }
+ }
+ }
+
+ if (micfil->constraint_rates.count > 0)
+ snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ &micfil->constraint_rates);
+
return 0;
}
@@ -1165,6 +1197,12 @@ static int fsl_micfil_probe(struct platform_device *pdev)
fsl_asoc_get_pll_clocks(&pdev->dev, &micfil->pll8k_clk,
&micfil->pll11k_clk);
+ micfil->clk_src[MICFIL_AUDIO_PLL1] = micfil->pll8k_clk;
+ micfil->clk_src[MICFIL_AUDIO_PLL2] = micfil->pll11k_clk;
+ micfil->clk_src[MICFIL_CLK_EXT3] = devm_clk_get(&pdev->dev, "clkext3");
+ if (IS_ERR(micfil->clk_src[MICFIL_CLK_EXT3]))
+ micfil->clk_src[MICFIL_CLK_EXT3] = NULL;
+
/* init regmap */
regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
if (IS_ERR(regs))
