iMX6Q VPU performance

[kristofferglemb]

What settings would give lower memory load?

Anyway I think someone at Freescale should be able to answer if it is possible to encode 1920x1080 @ 30 fps with memory running at 396 MHz or if it is some other issue we are facing.

[Yuri]

Hello,

  You may try the following :

1.

  Make sure below QoS settings are done in u-boot DCD table:

 /* enable AXI cache for VDOA/VPU/IPU */

 DATA 4 0x020e0010 0xF00000CF

 /* set IPU AXI-id0 Qos=0xf(bypass) AXI-id1 Qos=0x7 */

DATA 4 0x020e0018 0x007F007F

DATA 4 0x020e001c 0x007F007F

2.
  Force CPU to run at maximal frequency 

$ echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

Have a great day,
Yuri

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