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Comment: added QSPI known issue

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  • Kernel
    • Display: TI's Matrix-GUI demo only displays to either HDMI or LCD, not both. The workaround is to enable one or the other. LCD-018 is currently the default.
    • QSPI: Possible read failures on flash devices with HOLD function (Erratum i916). A software workaround has been implemented to limit QSPI to DIO-SPI mode. The hardware workaround is to disable internal pull-ups and add 10k pull-ups on X_QSPI1_D2 & X_QSPI1_D3.
      • For the software workaround, this commit also needs to be added to the source before building the .dtb. It is currently configured correctly when external pull-ups are installed.

Texas Instruments Known Issues (Kernel)

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