Hi, On Fri, Nov 15, 2019 at 3:19 AM Heiko Stübner <heiko@xxxxxxxxx> wrote: > > Hi Markus, > > Am Freitag, 15. November 2019, 11:37:58 CET schrieb Markus Reichl: > > Am 14.11.19 um 14:10 schrieb Heiko Stuebner: > > > $subject is missing the [PATCH] prefix > > will fix. > > no need to resend just for this ... just to keep in mind for future patches ;-) > > > > > Am Montag, 11. November 2019, 10:51:04 CET schrieb Markus Reichl: > > >> Working with rootfs on two 128GB mmcs on rk3399-roc-pc. > > >> > > >> One (mmc name 128G72, one screw hole) works fine in HS400 mode. > > >> Other (mmc name DJNB4R, firefly on pcb, two screw holes) gets lots of > > >> mmc1: "running CQE recovery", even hangs with damaged fs, > > >> when running under heavy load, e.g. compiling kernel. > > >> Both run fine with HS200. > > >> > > >> Disabling CQ with patch mmc: core: Add MMC Command Queue Support kernel parameter [0] did not help. > > >> [0] https://gitlab.com/ayufan-repos/rock64/linux-mainline-kernel/commit/54e264154b87dfe32a8359b2726e2d5611adbaf3 > > > > > > I'm hoping for some input from other people in Cc but your mail headers > > > also referenced the drive-impendance series from Christoph [0], which > > > it seems we need to poke the phy maintainer again. > > > > > > Did you check if changing the impedance helped (like the signal dampening > > > Philipp described in one of the replies there). > > > > checked with > > > > &emmc_phy { > > + drive-impedance-ohm = <33>; > > > > gives no improvement: > > That is sad ... I guess we really should disable hs400 then ... > that may give others more incentive to dive deeper ;-) Just out of curiosity, is the problem with the strobe line, or with hs400? Have you tried using the solution from "rk3399-gru.dtsi"? Namely: /* * Signal integrity isn't great at 200 MHz and 150 MHz (DDR) gives the * same (or nearly the same) performance for all eMMC that are intended * to be used. */ assigned-clock-rates = <150000000>; IIRC hs400 on rk3399 was a bit iffy but running at 150 MHz made it much more reliable and still gave you 300 MB/s transfer rate (so much better than hs200). In reality many eMMC chips can't do > 300 MB/s anyway. -Doug
