On Mon, Aug 05, 2019 at 04:41:12PM +0200, Pavel Machek wrote:
Hi!
[ Upstream commit 1c0479023412ab7834f2e98b796eb0d8c627cd62 ]
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.
This may not be suitable for stable. So... hs200 started working in mainline sometime. That does not mean it was fixed in all the various stable trees, too.
How was this tested in respective -stable releases?
If you know of any other patches required on older stable kernels to make this work I'll be more than happy to take them...
-- Thanks, Sasha