| Message ID | 1552376109-126335-1-git-send-email-shawn.lin@rock-chips.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | Add hardware unbusy interrupt support for dw_mmc | expand |
On Tue, 12 Mar 2019 at 08:36, Shawn Lin <shawn.lin@rock-chips.com> wrote: > > > DesignWare MMC controler lacks proper hardware wait > busy support, so the software must check the busy > state if the following tranfser need use data line. > And dw_mci_wait_while_busy() now use busy check mostly > with host's lock hold, and we can't relinguish CPU > at this moment, which makes it rather painful when used > in low-end platform. To solve this, Rockchip invent > a new hardware unbusy interrupt module, which could > generate interrupt if the state machine runs from > busy state into idle state. > > > Changes in v2: > - add tag from Ziyuan Xu > - remove lock for checking event since it's already atomic operation > > Shawn Lin (3): > mmc: dw_mmc: Check busy state in dw_mci_request() > mmc: dw_mmc: Add hardware unbusy interrupt support > mmc: dw_mmc-rockchip: Enable hardware unbusy interrupt support > > drivers/mmc/host/dw_mmc-rockchip.c | 30 ++++++++++++++++++++ > drivers/mmc/host/dw_mmc.c | 56 +++++++++++++++++++++++++++++++++++++- > drivers/mmc/host/dw_mmc.h | 6 ++++ > 3 files changed, 91 insertions(+), 1 deletion(-) > > -- > 1.9.1 > > > Applied for next, thanks! Kind regards Uffe