6. Known Issues

1. On the vck190_hdmiRx_hdmiTx platform, few of VCK190 boards HDMI TX display (blue screen) doesn’t come up right after linux boot in such scenarios, disconnect HDMI RX source and boot again. After the boot, connect back the HDMI RX source.

2. Enabling the primary plane on the Video Mixer by default results in a bandwidth utilization of 2GB. A patch is applied to disable the mixer primary plane by default. To enable/disable the primary plane through module_param and devmem use the following commands. To render a test pattern on the display using a utility like modetest, the primary plane should be enabled.

   • Enable:

   echo Y > /sys/module/xlnx_mixer/parameters/mixer_primary_enable
   

   • Disable:

   devmem 0xa0070040 32 0x0
   echo N > /sys/module/xlnx_mixer/parameters/mixer_primary_enable
   

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