i.MX Processors中的主题 Re: iMX8QXP SPDIF problem "cannot set hw params: Invalid argument"

iMX8QXP SPDIF problem "cannot set hw params: Invalid argument"

Buridan — Tue, 02 Feb 2021 07:22:50 GMT

Dear NXP experts:

Now I'm using SPDIF as the primary audio card of Android 10 on iMX8QXP mek board. I don't need the codec code and just output the SPDIF signal form SPDIF0_TX pin. The SDK version is imx8_10_2.2.0 .

My DTS config like this:

// imx8x-mek.dtsi &spdif0 { compatible = "fsl,imx8qm-spdif"; pinctrl-names = "default"; pinctrl-0 = <&pinctrl_spdif0>; assigned-clocks = <&acm IMX_ADMA_ACM_SPDIF0_TX_CLK_SEL>, <&clk IMX_SC_R_AUDIO_PLL_0 IMX_SC_PM_CLK_PLL>, <&clk IMX_SC_R_AUDIO_PLL_0 IMX_SC_PM_CLK_SLV_BUS>, <&clk IMX_SC_R_AUDIO_PLL_0 IMX_SC_PM_CLK_MST_BUS>, <&spdif0_lpcg 0>; assigned-clock-parents = <&aud_pll_div0_lpcg 0>; assigned-clock-rates = <0>, <786432000>, <49152000>, <24576000>, <49152000>; status = "okay"; }; pinctrl_spdif0: spdif0grp { fsl,pins = < IMX8QXP_SPDIF0_TX_ADMA_SPDIF0_TX 0xc6000040 IMX8QXP_SPDIF0_RX_ADMA_SPDIF0_RX 0xc6000040 >; }; // imxqxp-mek.dts sound-dummy { compatible = "fsl,imx-audio-dummy"; model = "imx-dummy"; dai-controller = <&sai0>, <&sai1>, <&esai0>, <&spdif0>; dai-codec = <&codec_dummy>; status = "okay"; };

The driver modified from NXP dummy codec example, and the part of SPDIF copy from kernel/sound/soc/fsl/imx-spdif.c like this:

// imx-dummy.c static int imx_dummy_spdif_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct device *dev = rtd->card->dev; int ret = 0; unsigned int freq; printk("run in %s\n", __func__); if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { u64 rate = params_rate(params); freq = do_div(rate, 8000) ? CLK_11K_FREQ : CLK_8K_FREQ; ret = snd_soc_dai_set_sysclk(rtd->cpu_dai, STC_TXCLK_SPDIF_ROOT, freq, SND_SOC_CLOCK_OUT); if (ret) dev_err(dev, "failed to set cpu sysclk: %d\n", ret); } return ret; } static struct snd_soc_ops imx_aif_spdif_ops = { .hw_params = imx_dummy_spdif_hw_params, }; static int imx_dummy_probe(struct platform_device *pdev) { ... for (i = 0; i < num_dai; i++) { ... priv->dai[i].stream_name = "SAI S/PDIF PCM"; priv->dai[i].codecs->dai_name = "snd-soc-dummy-dai"; priv->dai[i].codecs->name = "snd-soc-dummy"; ... if (strstr(cpu_np->name, "spdif")) { priv->dai[i].ops = &imx_aif_spdif_ops; } else { ... ... }

But it seems not work when I use tinyplay to play wav files:

mek_8q:/sdcard/Music # cat /proc/asound/cards 0 [imxdummy ]: imx-dummy - imx-dummy imx-dummy mek_8q:/sdcard/Music # ls /dev/snd/ controlC0 pcmC0D0p pcmC0D1p pcmC0D2p pcmC0D3p pcmC0D0c pcmC0D1c pcmC0D2c pcmC0D3c timer mek_8q:/sdcard/Music # tinyplay ./1khz-16000-16-1.wav -D 0 -d 3 -p 1024 -n 3 Sample is 1 channels, device only supports >= 2 channels Bitrate is 16 bits, device only supports >= 32 bits mek_8q:/sdcard/Music # tinyplay ./1khz-16000-32-2.wav -D 0 -d 3 -p 1024 -n 3 Sample rate is 16000Hz, device only supports >= 32000Hz mek_8q:/sdcard/Music # tinyplay ./1khz-48000-32-2.wav -D 0 -d 3 -p 1024 -n 3 Unable to open PCM device 3 (cannot set hw params: Invalid argument) mek_8q:/sdcard/Music # tinymix Mixer name: 'imx-dummy' Number of controls: 9 ctl type num name value 0 IEC958 1 IEC958 Playback Default unknown 1 IEC958 1 IEC958 Capture Default unknown 2 IEC958 1 IEC958 Subcode Capture Default unknown Failed to mixer_ctl_get_array 3 BYTE 12 IEC958 Q-subcode Capture Default 4 BOOL 1 IEC958 Rx V-Bit Errors Off 5 BOOL 1 IEC958 Tx V-Bit Off 6 INT 1 RX Sample Rate 0 7 BOOL 1 IEC958 USyncMode CDText Off 8 BOOL 1 IEC958 Rx Raw Capture Mode Bit Off

After configured the SPDIF(/dev/snd/pcmC0D3x, port = 3) as the primary card in vendor/nxp-opensource/imx/alsa/tinyalsa_hal.cpp, the logcat like this when playing audio in app:

02-01 07:15:14.972 371 2137 I audio_hw_primary: start_output_stream: out: 0xe8f47600, device: 2, address: , mode: 0, flags 0x2 02-01 07:15:14.972 371 2137 I audio_hw_primary: select_output_device(), headphone 0 ,headset 0 ,speaker 2 02-01 07:15:14.972 371 2137 I audio_hw_primary: start_output_stream: set to pcm_config_mm_out, rate 48000, chn 2, format 0x0 02-01 07:15:14.972 371 2137 D audio_hw_primary: start_output_stream: pcm_open: card: 0, rate: 48000, channel: 2, format: 0, period_size: 0x400, flag: 8 02-01 07:15:14.980 371 2137 E audio_hw_primary: start_output_stream: pcm_open error: cannot set hw params: Invalid argument 02-01 07:15:14.981 371 2137 V audio_hw_primary: write error, sleep few ms

Is there anything else I need to do for this problem? Thank you!

Re: iMX8QXP SPDIF problem "cannot set hw params: Invalid argument"

Buridan — Wed, 03 Feb 2021 02:28:57 GMT

I opend the DEBUG macro and the printf output:

mek_8q:/ # dmesg | grep dai [ 5.169054] fsl-spdif-dai 59020000.spdif: use rxtx1 as tx clock source for 32000Hz sample rate [ 5.169066] fsl-spdif-dai 59020000.spdif: use txclk df 24 for 32000Hz sample rate [ 5.169072] fsl-spdif-dai 59020000.spdif: the best rate for 32000Hz sample rate is 32000Hz [ 5.176404] fsl-spdif-dai 59020000.spdif: use rxtx5 as tx clock source for 44100Hz sample rate [ 5.176411] fsl-spdif-dai 59020000.spdif: use txclk df 19 for 44100Hz sample rate [ 5.176419] fsl-spdif-dai 59020000.spdif: use sysclk df 3 for 44100Hz sample rate [ 5.176426] fsl-spdif-dai 59020000.spdif: the best rate for 44100Hz sample rate is 43859Hz [ 5.176438] fsl-spdif-dai 59020000.spdif: use rxtx1 as tx clock source for 48000Hz sample rate [ 5.176444] fsl-spdif-dai 59020000.spdif: use txclk df 16 for 48000Hz sample rate [ 5.176451] fsl-spdif-dai 59020000.spdif: the best rate for 48000Hz sample rate is 48000Hz [ 5.176460] fsl-spdif-dai 59020000.spdif: use rxtx1 as tx clock source for 96000Hz sample rate [ 5.176466] fsl-spdif-dai 59020000.spdif: use txclk df 8 for 96000Hz sample rate [ 5.176474] fsl-spdif-dai 59020000.spdif: the best rate for 96000Hz sample rate is 96000Hz [ 5.176482] fsl-spdif-dai 59020000.spdif: use rxtx1 as tx clock source for 192000Hz sample rate [ 5.176489] fsl-spdif-dai 59020000.spdif: use txclk df 4 for 192000Hz sample rate [ 5.176497] fsl-spdif-dai 59020000.spdif: the best rate for 192000Hz sample rate is 192000Hz [ 5.188105] imx-dummy sound-dummy: snd-soc-dummy-dai <-> 59040000.sai mapping ok [ 5.198172] imx-dummy sound-dummy: snd-soc-dummy-dai <-> 59050000.sai mapping ok [ 5.208096] imx-dummy sound-dummy: snd-soc-dummy-dai <-> 59010000.esai mapping ok [ 5.222350] imx-dummy sound-dummy: snd-soc-dummy-dai <-> 59020000.spdif mapping ok mek_8q:/ # tinyplay /sdcard/Music/1 1khz-16000-16-1.wav 1khz-32000-32-2.wav 1khz-8000-8-2.wav 1khz-16000-32-2.wav 1khz-48000-32-2.wav mek_8q:/ # tinyplay /sdcard/Music/1khz-48000-32-2.wav -D 0 -d 3 -p 1024 -n 3 Unable to open PCM device 3 (cannot set hw params: Invalid argument)

Re: iMX8QXP SPDIF problem "cannot set hw params: Invalid argument"

igorpadykov — Sun, 07 Feb 2021 23:31:34 GMT

Hi Buridan

such configuration (without codec) is not supported in nxp bsps, in general one

can try to follow similar example with "simple-audio-card "

https://source.codeaurora.org/external/imx/linux-imx/tree/arch/arm64/boot/dts/freescale/imx8qxp-mek-sof-cs42888.dts?h=imx_5.4.70_2.3.0

https://source.codeaurora.org/external/imx/linux-imx/tree/Documentation/devicetree/bindings/sound/simple-card.txt?h=imx_5.4.70_2.3.0

Use Chapter 7 Audio i.MX Linux Reference Manual describing all linux ALSA software layers

Best regards
igor

Re: iMX8QXP SPDIF problem "cannot set hw params: Invalid argument"

Buridan — Mon, 22 Feb 2021 08:59:23 GMT

Dear igor:

Do you mean the S/PDIF can only be used in "simple-audio-card" framework? Currently I am using the custom machine driver to create audio card.

I may posted the wrong information that the codec of the sound card is dummy audio codec which is refer to the Dummy audio codec - play & record on i.MX8MM.

And if I just use the S/PDIF driver at kernel/sound/soc/fsl/imx-spdif.c (block the imx-dummy.c) refer to the i.MX Linux Reference Manual in capter 7.4.2~7.4.5, the dts:

sound-spdif { compatible = "fsl,imx-audio-spdif"; model = "imx-spdif"; spdif-controller = <&spdif0>; spdif-in; spdif-out; };

Then I will get the same problem in the main post. Except the S/PDIF, the SAI/ESAI has already worked with dummy codec.