As some point hs200 was failing on rk3288-veyron-minnie. See commit 984926781122 ("ARM: dts: rockchip: temporarily remove emmc hs200 speed from rk3288 minnie"). Although I didn't track down exactly when it started working, it seems to work OK now, so let's turn it back on.
To test this, I booted from SD card and then used this script to stress the enumeration process after fixing a memory leak [1]: cd /sys/bus/platform/drivers/dwmmc_rockchip for i in $(seq 1 3000); do echo "========================" $i echo ff0f0000.dwmmc > unbind sleep .5 echo ff0f0000.dwmmc > bind while true; do if [ -e /dev/mmcblk2 ]; then break; fi sleep .1 done done It worked fine. [1] https://lkml.kernel.org/r/20190503233526.226272-1-diand...@chromium.org Signed-off-by: Douglas Anderson <diand...@chromium.org> --- arch/arm/boot/dts/rk3288-veyron-minnie.dts | 4 ---- 1 file changed, 4 deletions(-) diff --git a/arch/arm/boot/dts/rk3288-veyron-minnie.dts b/arch/arm/boot/dts/rk3288-veyron-minnie.dts index 468a1818545d..ce57881625ec 100644 --- a/arch/arm/boot/dts/rk3288-veyron-minnie.dts +++ b/arch/arm/boot/dts/rk3288-veyron-minnie.dts @@ -90,10 +90,6 @@ pwm-off-delay-ms = <200>; }; -&emmc { - /delete-property/mmc-hs200-1_8v; -}; - &gpio_keys { pinctrl-0 = <&pwr_key_l &ap_lid_int_l &volum_down_l &volum_up_l>; -- 2.21.0.1020.gf2820cf01a-goog