diff options
| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2018-07-25 11:48:39 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-25 10:55:29 +0200 |
| commit | 2d8ff0b586fb1c5bd81a3ab286dcc6bbc432044e (patch) | |
| tree | 0bdc18fec7a9d72e29b0b754a24b9a1df876b34b /drivers/thunderbolt/tb_msgs.h | |
| parent | fa3af1cb1ec073265c9c87ec44faf006f2f12d96 (diff) | |
thunderbolt: Add support for runtime PM
When Thunderbolt host controller is set to RTD3 mode (Runtime D3) it is
present all the time. Because of this it is important to runtime suspend
the controller whenever possible. In case of ICM we have following rules
which all needs to be true before the host controller can be put to D3:
- The controller firmware reports to support RTD3
- All the connected devices announce support for RTD3
- There is no active XDomain connection
Implement this using standard Linux runtime PM APIs so that when all the
children devices are runtime suspended, the Thunderbolt host controller
PCI device is runtime suspended as well. The ICM firmware then starts
powering down power domains towards RTD3 but it can prevent this if it
detects that there is an active Display Port stream (this is not visible
to the software, though).
The Thunderbolt host controller will be runtime resumed either when
there is a remote wake event (device is connected or disconnected), or
when there is access from userspace that requires hardware access.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/thunderbolt/tb_msgs.h')
| -rw-r--r-- | drivers/thunderbolt/tb_msgs.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/thunderbolt/tb_msgs.h b/drivers/thunderbolt/tb_msgs.h index bc13f8d6b804..2487e162c885 100644 --- a/drivers/thunderbolt/tb_msgs.h +++ b/drivers/thunderbolt/tb_msgs.h @@ -286,6 +286,8 @@ struct icm_ar_pkg_driver_ready_response { u16 info; }; +#define ICM_AR_FLAGS_RTD3 BIT(6) + #define ICM_AR_INFO_SLEVEL_MASK GENMASK(3, 0) #define ICM_AR_INFO_BOOT_ACL_SHIFT 7 #define ICM_AR_INFO_BOOT_ACL_MASK GENMASK(11, 7) @@ -333,6 +335,8 @@ struct icm_tr_pkg_driver_ready_response { u16 reserved2; }; +#define ICM_TR_FLAGS_RTD3 BIT(6) + #define ICM_TR_INFO_SLEVEL_MASK GENMASK(2, 0) #define ICM_TR_INFO_BOOT_ACL_SHIFT 7 #define ICM_TR_INFO_BOOT_ACL_MASK GENMASK(12, 7) |