HI,
We have developed a custom board with AM5718 processor using ti-processor-sdk-linux-am57xx-evm-05.02.00.10. In the process of playing audio we are facing the problem and we are listing the patches and the parameters that we have changed in order to get the audio but we are unable to make the audio get played. For our processor in order to get the audio to play the MCLK should be 20MHz and we are able to get the MCLK but we are not able to get the sound while playing the audio files. So kindly help on this.
We have added the highlighted part in davinci-mcasp.c
static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id,
unsigned int freq, int dir)
{
static void __iomem *mcasp3_base;
uint32_t value/*,ui_temp*/;
struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
printk(KERN_INFO "Enter davinci_mcasp_set_sysclk()\n");
pm_runtime_get_sync(mcasp->dev);
printk(KERN_INFO "dir == SND_SOC_CLOCK_OUT\n");
mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AHCLKX);
#if 0
if (dir == SND_SOC_CLOCK_IN) {
switch (clk_id) {
case MCASP_CLK_HCLK_AHCLK:
mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG,
AHCLKXE);
mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG,
AHCLKRE);
mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AHCLKX);
break;
case MCASP_CLK_HCLK_AUXCLK:
mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG,
AHCLKXE);
mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG,
AHCLKRE);
break;
default:
dev_err(mcasp->dev, "Invalid clk id: %d\n", clk_id);
goto out;
}
} else {
/* Select AUXCLK as HCLK */
mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AHCLKX);
}
#endif
mcasp3_base = ioremap(0x4A00369C,4);
value = __raw_readl(mcasp3_base);
printk(KERN_INFO "XREF_CLKOUT2 == %x \n",value);
(void)__raw_writel(0x10003,mcasp3_base );
mcasp3_base = ioremap(0x4A003774,4);
value = __raw_readl(mcasp3_base);
(void)__raw_writel(0x4000A,mcasp3_base );
mcasp3_base = ioremap(0x48440216,4);
value = __raw_readl(mcasp3_base);
(void)__raw_writel(value|0x2,mcasp3_base );
/*
* When AHCLK X/R is selected to be output it means that the HCLK is
* the same clock - coming via AUXCLK.
*/
mcasp->sysclk_freq = freq;
//out:
pm_runtime_put(mcasp->dev);
return 0;
}
static void mcasp_start_tx(struct davinci_mcasp *mcasp)
{
........
/* enable transmit IRQs */
mcasp_set_bits(mcasp, DAVINCI_MCASP_EVTCTLX_REG,
mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK]);
mcasp3_base = ioremap(0x4A009868 ,4);
value = __raw_readl(mcasp3_base);
printk(KERN_INFO "CM_L4PER2_MCASP3_CLKCTRL %x\n",value);
mcasp3_base = ioremap(0x4A0051EC ,4);
(void)__raw_writel(0x00800000,mcasp3_base );
mcasp3_base = ioremap(0x4A0051E0 ,4);
(void)__raw_writel(0x00000005,mcasp3_base );
mcasp3_base = ioremap(0x4A0051E4 ,4);
(void)__raw_writel(0x00000002,mcasp3_base );
}
static void mcasp_start_rx(struct davinci_mcasp *mcasp)
{
.............
/* enable receive IRQs */
mcasp_set_bits(mcasp, DAVINCI_MCASP_EVTCTLR_REG,
mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE]);
mcasp3_base = ioremap(0x4A009868 ,4);
value = __raw_readl(mcasp3_base);
printk(KERN_INFO "CM_L4PER2_MCASP3_CLKCTRL %x\n",value);
mcasp3_base = ioremap(0x4A0051EC ,4);
(void)__raw_writel(0x00800000,mcasp3_base );
mcasp3_base = ioremap(0x4A0051E0 ,4);
(void)__raw_writel(0x00000005,mcasp3_base );
mcasp3_base = ioremap(0x4A0051E4 ,4);
(void)__raw_writel(0x00000002,mcasp3_base );
}
am571x-idk.dts file :
sound0: sound@0 {
compatible = "simple-audio-card";
simple-audio-card,name = "AM571x";
simple-audio-card,widgets =
"Line", "Line Out",
"Line", "Line In";
simple-audio-card,routing =
"Line Out", "LLOUT",
"Line Out", "RLOUT",
"MIC2L", "Line In",
"MIC2R", "Line In";
simple-audio-card,format = "dsp_b";
simple-audio-card,bitclock-master = <&sound0_master>;
simple-audio-card,frame-master = <&sound0_master>;
simple-audio-card,bitclock-inversion;
simple-audio-card,cpu {
sound-dai = <&mcasp3>;
system-clock-frequency = <5644800>;
};
sound0_master: simple-audio-card,codec {
sound-dai = <&tlv320aic3104>;
clocks = <&clkout2_clk>;
//clocks = <&atl_clkin2_ck>;
};
};
mcasp3_pins_default: mcasp3_pins_default {
pinctrl-single,pins = <
0x29c ((0x40000)|PIN_OUTPUT_PULLUP | MUX_MODE3) /* clk2. */
0x328 ( (0xC0000)| MUX_MODE0) /* mcasp3_fsx.mcasp1_fsx */
0x324 ( (0x40000)| MUX_MODE0) /* mcasp3_aclkx.mcasp1_aclkx */
0x32c ((0xC0000) | MUX_MODE0) /* mcasp3_axr0.mcasp1_axr0 */
0x330 ((0xC0160) | MUX_MODE0) /* mcasp3_axr1.mcasp1_axr1 */
>;
};
&i2c1 {
status = "okay";
clock-frequency = <400000>;
tlv320aic3104: tlv320aic3104@18 {
#sound-dai-cells = <0>;
compatible = "ti,tlv320aic3104";
reg = <0x18>;
assigned-clocks = <&clkoutmux2_clk_mux>;
assigned-clock-parents = <&sys_clk2_dclk_div>;
adc-settle-ms = <40>;
AVDD-supply = <&vdd_3v3>;
IOVDD-supply = <&vdd_3v3>;
DRVDD-supply = <&vdd_3v3>;
DVDD-supply = <&aic_dvdd>;
status = "okay";
};
};
&mcasp3 {
#sound-dai-cells = <0>;
status = "okay";
pinctrl-0 = <&mcasp3_pins_default>;
assigned-clocks = <&mcasp3_ahclkx_mux>;
assigned-clock-parents = <&sys_clkin2>;
assigned-clock-rates = <22579200>;
op-mode = <0>; /* MCASP_IIS_MODE */
tdm-slots = <2>;
/* 4 serializers */
serial-dir = < /* 0: INACTIVE, 1: TX, 2: RX */
1 2 0 0
>;
tx-num-evt = <8>;
rx-num-evt = <8>;
};
Thanks & Regards
Prasad.
