topic gpu & vpu probe issue in i.MX Processors

gpu & vpu probe issue

zohanlin — Tue, 12 Jan 2021 08:44:59 GMT

Dear guys,

I have one OS yocto 2.4 rock (kernel 4.9.88) which runs in imx6q, the gpu and vpu work well.

So I try another OS yocto 3.1 Zeus(kernel 5.4.47)which runs in imx6q, the gpu and vpu don't work.

Log as below

[ 3.850835] galcore 130000.gpu: ignoring dependency for device, assuming no driver [ 3.858990] mxc_vpu 2040000.vpu_fsl: ignoring dependency for device, assuming no driver

Could somebody help me?

Re: gpu & vpu probe issue

zohanlin — Tue, 12 Jan 2021 10:49:59 GMT

I tried to modify dts and set #power-domain-cells by <1>

--------------------------------------------------------------------------

pd_pu: power-domain@1 {
reg = <1>;
#power-domain-cells = <1>;
power-supply = <&reg_pu>;
clocks = <&clks IMX6QDL_CLK_GPU3D_CORE>,
<&clks IMX6QDL_CLK_GPU3D_SHADER>,
<&clks IMX6QDL_CLK_GPU2D_CORE>,
<&clks IMX6QDL_CLK_GPU2D_AXI>,
<&clks IMX6QDL_CLK_OPENVG_AXI>,
<&clks IMX6QDL_CLK_VPU_AXI>;
};

Now the log is

root@imx6qsabresd:~# dmesg | grep -i "gpu"
[ 3.628942] OF: /soc/gpu@00130000: #power-domain-cells = 1 found -1
[ 4.328302] galcore: probe of 130000.gpu failed with error -22

root@imx6qsabresd:~# dmesg | grep -i "gal"
[ 3.291714] egalax_ts 1-0004: Failed to switch to I2C interface
[ 3.298098] egalax_ts 2-0004: Failed to switch to I2C interface
[ 3.636502] Galcore version 6.4.3.p0.286725
[ 4.291168] [galcore]: Feature database is not found,chipModel=0x0, chipRevision=0x0, productID=0x0, ecoID=0x0, customerID=0x0
[ 4.328302] galcore: probe of 130000.gpu failed with error -22

root@imx6qsabresd:~# dmesg | grep -i "vpu"
[ 4.334554] OF: /soc/aips-bus@2000000/vpu_fsl@2040000: #power-domain-cells = 1 found -1
[ 4.343296] mxc_vpu 2040000.vpu_fsl: VPU initialized

Re: gpu & vpu probe issue

igorpadykov — Tue, 12 Jan 2021 10:58:56 GMT

Hi zohanlin

one can try to test vpu,gpu on nxp sabresd reference board with Demo Image

i.MX 6QuadPlus, i.MX 6Quad, i.MX 6DualLite, i.MX 6SoloX Boards

https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applications-processors:IMXLINUX?tab=In-Depth_Tab

Best regards
igor

Re: gpu & vpu probe issue

zohanlin — Wed, 13 Jan 2021 11:16:03 GMT

Hi igor,

My board is not EVK, so I could not test the demo image.

I downloaded linux-imx 5.4.70, and the version has the same problem.

Could you have other suggestions?

Re: gpu & vpu probe issue

zohanlin — Thu, 14 Jan 2021 03:34:49 GMT

I found a post about the issue.

https://community.nxp.com/t5/i-MX-Processors/Problem-with-galcore-GPU-module-on-imx6-Solo/td-p/1056000

Bio_TICFSL said : Sorry and yes the issue is on DTBs.

Is it really?

Re: gpu & vpu probe issue

zohanlin — Fri, 15 Jan 2021 10:31:06 GMT

Hi igor,

I found the reason that is my custom board remove the pmic.

So I comment some dts item as below

/* &reg_arm { vin-supply = <&sw1a_reg>; }; &reg_pu { vin-supply = <&sw1c_reg>; }; &reg_soc { vin-supply = <&sw1c_reg>; }; */

Now the GPU & VPU can work well.