i.MX ProcessorsのトピックProblem about GPU's __ResetGPU

Problem about GPU's __ResetGPU

jiongzhongliu — Thu, 12 May 2016 03:03:43 GMT

My board is a custom board based on IMX6Q sabresd,I used linux 3.10(yocto git://git.freescale.com/imx/fsl-arm-yocto-bsp.git -b imx-3.10.17-1.0.2_ga)。I shall use this linux version.

there is a problem about GPU initialization,it initialize the GPU failed, and I found it is hang in gc_hal_kernel_hardware.c--->__RestGPU:

static gceSTATUS _ResetGPU(

IN gckHARDWARE Hardware,

IN gckOS Os,

IN gceCORE Core

)

{

.......

for (;;)

{

....

gcmkONERROR(gckOS_WriteRegisterEx(Os,

Core,

0x00000,

control));

/* Read idle register. */

gcmkONERROR(gckOS_ReadRegisterEx(Os,

Core,

0x00004,

&idle));

if ((((((gctUINT32) (idle)) >> (0 ? 0:0)) & ((gctUINT32) ((((1 ? 0:0) - (0 ? 0:0) + 1) == 32) ? ~0 : (~(~0 << ((1 ? 0:0) - (0 ? 0:0) + 1)))))) ) == 0)

{

continue; -------------------------------------->( **************always continue there*********)

}

.....

}

.....

}

It seems the write register failed. Can any body tell me what cause this problem? thank you!

Re: Problem about GPU's __ResetGPU

igorpadykov — Thu, 12 May 2016 07:23:46 GMT

Hi jiongzhong

you can narrow down issue, if this is caused by DDR errors or some

gpu erratum, running codes on reference Sabre board or using

more new linux where many gpu errata were fixed.

Best regards

igor

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

Note: If this post answers your question, please click the Correct Answer button. Thank you!

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

Re: Problem about GPU's __ResetGPU

jiongzhongliu — Fri, 13 May 2016 01:05:34 GMT

thank you. Is there a datasheet about IMX6Q's GPU registers? The IMX6Q datasheet describe nothing about GPU registers.

Re: Problem about GPU's __ResetGPU

igorpadykov — Fri, 13 May 2016 01:48:45 GMT

unfrotunately no, as this is confidential info.