Am 5. April 2025 14:00:00 UTC schrieb Guenter Roeck <li...@roeck-us.net>:
>This series is needed to support the USB interface on imx8mp-evk when
>booting the Linux kernel.
>
>According to the XHCI specification, ERSTBA should be written in Low-High
>order. The Linux kernel writes the high word first. This results in an
>initialization failure.
>
>The following information is found in the Linux kernel commit log.
>
>[Synopsys]- The host controller was design to support ERST setting
>during the RUN state. But since there is a limitation in controller
>in supporting separate ERSTBA_HI and ERSTBA_LO programming,
>It is supported when the ERSTBA is programmed in 64bit,
>or in 32 bit mode ERSTBA_HI before ERSTBA_LO
>
>[Synopsys]- The internal initialization of event ring fetches
>the "Event Ring Segment Table Entry" based on the indication of
>ERSTBA_LO written.
>
>Add property to support writing the high word first. Enable it
>for dwc3.
>
>----------------------------------------------------------------
>Guenter Roeck (2):
> hw: usb: xhci: Add property to support writing ERSTBA in high-low order
> hw/usb/hcd-dwc3: Set erstba-hi-lo property
>
> hw/usb/hcd-dwc3.c | 1 +
> hw/usb/hcd-xhci.c | 8 +++++++-
> hw/usb/hcd-xhci.h | 1 +
> 3 files changed, 9 insertions(+), 1 deletion(-)
Series:
Reviewed-by: Bernhard Beschow <shen...@gmail.com>
