Hi Kishon, Since the Shawn isn't available, I take over this series patches for now.
As the original bug had tracked on https://issuetracker.google.com/71561742. In some cases, the mmc phy power on failed during booting up. The log as below: ... [ 2.375333] rockchip_emmc_phy_power: caldone timeout. [ 2.377815] phy phy-ff770000.syscon:phy@f780.4: phy poweron failed --> -110 ... [ 2.489295] mmc0: mmc_select_hs400es failed, error -110 [ 2.489302] mmc0: error -110 whilst initialising MMC card .. The actual emulate, the wait 5us for calpad busy trimming, that's no enough. We need give the enough margin for it. Verified on url = https://chromium.googlesource.com/chromiumos/third_party/kernel/+/chromeos-4.4 This series patches can apply and bring up with kernel-next on rk3399 chromebook. -Caesar Changes in v2: - print the return valut with regmap_read_poll_timeout failing. - As Brian commented on https://patchwork.kernel.org/patch/10139891/, changed the note and added to print error value with regmap_read_poll_timeout API. Shawn Lin (2): phy: rockchip-emmc: retry calpad busy trimming phy: rockchip-emmc: use regmap_read_poll_timeout to poll dllrdy drivers/phy/rockchip/phy-rockchip-emmc.c | 60 +++++++++++++++----------------- 1 file changed, 28 insertions(+), 32 deletions(-) -- 2.7.4
