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i.MX8M GPU max clock

Question asked by Gary Bisson on Jul 2, 2018
Latest reply on Jul 13, 2018 by Gary Bisson
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Hi,

 

Both the TRM and Datasheet mention the GC7000L GPU as being able to run @1GHz (shader clock).

  • See "i.MX 8M Dual/8M QuadLite/8M Quad Applications Processors Reference Manual, Rev. 0, 01/2018" Table 5-1 Clock Root Table
  • Or "i.MX 8M Dual / 8M QuadLite / 8M Quad Applications Processors Data Sheet for Consumer Products, Rev. 0, 01/2018" Table 7 Operating ranges

 

However in every branch that support i.MX8MQ processors, that shader clock is clearly limited to 800MHz:

https://source.codeaurora.org/external/imx/linux-imx/tree/arch/arm64/boot/dts/freescale/fsl-imx8mq.dtsi?h=imx_4.9.88_2.0… 

fsl-imx8mq.dtsi\freescale\dts\boot\arm64\arch - linux-imx - i.MX Linux kernel 

 

Can you explain that limitation? Have you had issues running the shader clock @1GHz?

 

Regards,

Gary

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