fd71f258bc
U-Boot queries the FIFO water level to reduce checking status register when doing PIO SD card operation. Report a FIFO water level of 1 when data is ready, to prevent the code from trying to read 0 words from the FIFO each time. Signed-off-by: Icenowy Zheng <uwu@icenowy.me> Message-id: 20220520124200.2112699-1-uwu@icenowy.me Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>