diff options
| author | Bjørn Mork <bjorn@mork.no> | 2015-12-03 19:24:18 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-12 11:45:29 +0200 |
| commit | 85338431fcf945d785b414a1a234d986d4140666 (patch) | |
| tree | 8aeb4984197da62fb1a993794ec360ba091ce18d /scripts/patch-kernel | |
| parent | e3f2b1f74779e98717cb4af4bda9b54576c9dd9a (diff) | |
net: qmi_wwan: MDM9x30 specific power management
[ Upstream commit 93725149794d3d418cf1eddcae60c7b536c5faa1 ]
MDM9x30 based modems appear to go into a deeper sleep when
suspended without "Remote Wakeup" enabled. The QMI interface
will not respond unless a "set DTR" control request is sent
on resume. The effect is similar to a QMI_CTL SYNC request,
resetting (some of) the firmware state.
We allow userspace sessions to span multiple character device
open/close sequences. This means that userspace can depend
on firmware state while both the netdev and the character
device are closed. We have disabled "needs_remote_wakeup" at
this point to allow devices without remote wakeup support to
be auto-suspended.
To make sure the MDM9x30 keeps firmware state, we need to
keep "needs_remote_wakeup" always set. We also need to
issue a "set DTR" request to enable the QMI interface.
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'scripts/patch-kernel')
0 files changed, 0 insertions, 0 deletions