imx8mp clock registration errors

sureshkrishna — Fri, 26 Nov 2021 11:41:02 GMT

Hi Community,

For sound-wm8960 configuration using sai3, but the sai mclk's are not initialised during boot. Which is evident from the boot log

[    0.201181] i.MX clk 324: register failed with -2
[    0.201193] i.MX clk 325: register failed with -2
[    0.201198] i.MX clk 326: register failed with -2
[    0.201203] i.MX clk 328: register failed with -2
[    0.201207] i.MX clk 329: register failed with -2
[    0.201216] i.MX clk 330: register failed with -2

What is the possible reason this issue occurs, the dts was ported from lt-5.4-y which was working?
Also there are other error msgs that follow after the above log as below:

[    1.301886] imx-lcdifv3 32e80000.lcd-controller: No pix clock get: -517
[    1.309244] imx-lcdifv3 32e90000.lcd-controller: No pix clock get: -517
[    1.316171] imx-lcdifv3 32fc6000.lcd-controller: No irq get, ret=-517
[    1.327189] imx-hdmi-pavi 32fc4000.hdmi-pai-pvi: No pvi clock get
[    2.031615] fsl-sai 30c20000.sai: failed to get bus clock: -517
[    2.039608] fsl-sai 30c30000.sai: failed to get bus clock: -517
[    2.048815] fsl-micfil-dai 30ca0000.micfil: failed to get core clock: -517
[    2.056547] fsl-easrc 30c90000.easrc: failed to get mem clock
[    2.062846] fsl,imx8mp-audio-xcvr 30cc0000.xcvr: failed to get ipg clock
[    2.070287] fsl-aud2htx 30cb0000.aud2htx: failed to get mem clock
[    2.077648] imx-xcvr sound-xcvr: snd_soc_register_card failed: -517
[    2.085047] imx-micfil sound-micfil: snd_soc_register_card failed (-517)
[    2.092442] imx-cdnhdmi sound-hdmi: snd_soc_register_card failed (-517)

I have attached the full boot log. Any inputs related to fixing the clock issues will be helpful.

sai3 dts node:

&sai3 { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_sai3>; clocks = <&audio_blk_ctrl IMX8MP_CLK_AUDIO_BLK_CTRL_SAI3_IPG>, <&clk IMX8MP_CLK_DUMMY>, <&audio_blk_ctrl IMX8MP_CLK_AUDIO_BLK_CTRL_SAI3_MCLK1>, <&clk IMX8MP_CLK_DUMMY>, <&clk IMX8MP_CLK_DUMMY>; clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3"; assigned-clocks = <&clk IMX8MP_CLK_SAI3>; assigned-clock-parents = <&clk IMX8MP_AUDIO_PLL1_OUT>; assigned-clock-rates = <12288000>; fsl,sai-mclk-direction-output; status = "okay"; };

clk node in dts:

&clk { init-on-array = <IMX8MP_CLK_HSIO_ROOT>; }

Any help is kindly appreciated.

Re: imx8mp clock registration errors

Hamza_Jamil — Fri, 11 Mar 2022 19:40:15 GMT

Hi,

I am also facing the same type of errors in dmesg, did you found anything related to it? if yes please share. Thanks.

Regards

Re: imx8mp clock registration errors

andynic — Tue, 03 May 2022 06:05:47 GMT

I have the same issue. Any suggestion would be appreciated.

Re: imx8mp clock registration errors

sureshkrishna — Wed, 04 May 2022 16:09:43 GMT

Hi,

I fixed the error by defining the corresponding clocks in my dts 'clk' node

eg: if sai1_mclk is missing then,

clk {
clocks = <&sai1_mclk>
clock-names = "sai1_mclk"
assigned-clocks = <&clk IMX8MP_CLK_SAI1>
}

After manually fixing them I later on stumbled upon an upstream patch
https://source.codeaurora.org/external/imx/linux-imx/commit/?h=lf-5.10.y&id=094e478c1e2d9c2939ccfbcd9e0d26c6687f1ca9

With this patch you don't need to define all the clocks in one go rather define it when its needed.

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