On Fri, 15 Nov 2019 at 14:45, Eugeniu Rosca <erosca@xxxxxxxxxxxxxx> wrote: > > Isolated initially to renesas_sdhi_internal_dmac [1], Ulf suggested > adding MMC_CAP_ERASE to the TMIO mmc core: > > On Fri, Nov 15, 2019 at 10:27:25AM +0100, Ulf Hansson wrote: > -- snip -- > This test and due to the discussions with Wolfram and you in this > thread, I would actually suggest that you enable MMC_CAP_ERASE for all > tmio variants, rather than just for this particular one. > > In other words, set the cap in tmio_mmc_host_probe() should be fine, > as it seems none of the tmio variants supports HW busy detection at > this point. > -- snip -- > > Testing on R-Car H3ULCB-KF doesn't reveal any issues (v5.4-rc7): > > root@rcar-gen3:~# lsblk > NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT > mmcblk0 179:0 0 59.2G 0 disk <--- eMMC > mmcblk0boot0 179:8 0 4M 1 disk > mmcblk0boot1 179:16 0 4M 1 disk > mmcblk1 179:24 0 30G 0 disk <--- SD card > > root@rcar-gen3:~# time blkdiscard /dev/mmcblk0 > real 0m8.659s > user 0m0.001s > sys 0m1.920s > > root@rcar-gen3:~# time blkdiscard /dev/mmcblk1 > real 0m1.176s > user 0m0.001s > sys 0m0.124s > > [1] https://lore.kernel.org/linux-renesas-soc/20191112134808.23546-1-erosca@xxxxxxxxxxxxxx/ > > Cc: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx> > Cc: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx> > Cc: Andrew Gabbasov <andrew_gabbasov@xxxxxxxxxx> > Originally-by: Harish Jenny K N <harish_kandiga@xxxxxxxxxx> > Suggested-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> > Signed-off-by: Eugeniu Rosca <erosca@xxxxxxxxxxxxxx> Applied for next, thanks! Kind regards Uffe > --- > drivers/mmc/host/tmio_mmc_core.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c > index 9b6e1001e77c..dec5a99f52cf 100644 > --- a/drivers/mmc/host/tmio_mmc_core.c > +++ b/drivers/mmc/host/tmio_mmc_core.c > @@ -1184,7 +1184,7 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host) > if (ret == -EPROBE_DEFER) > return ret; > > - mmc->caps |= MMC_CAP_4_BIT_DATA | pdata->capabilities; > + mmc->caps |= MMC_CAP_ERASE | MMC_CAP_4_BIT_DATA | pdata->capabilities; > mmc->caps2 |= pdata->capabilities2; > mmc->max_segs = pdata->max_segs ? : 32; > mmc->max_blk_size = TMIO_MAX_BLK_SIZE; > -- > 2.24.0 >
