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| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2020-11-10 11:34:07 +0300 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2020-11-30 14:39:24 +0300 |
| commit | 661b19473bf3ac0924560f0cbf84c15458b3c8de (patch) | |
| tree | 32a36bb669b6a4bc3536f3386107a2853a01ec6e /drivers/thunderbolt/tb.h | |
| parent | 463e48fa544826898791085508459de246fc4c09 (diff) | |
| download | lwn-661b19473bf3ac0924560f0cbf84c15458b3c8de.tar.gz lwn-661b19473bf3ac0924560f0cbf84c15458b3c8de.zip | |
thunderbolt: Perform USB4 router NVM upgrade in two phases
The currect code expects that the router returns back the status of the
NVM authentication immediately. When tested against a real USB4 device
what happens is that the router is reset and only after that the result
is updated in the ROUTER_CS_26 register status field. This also seems to
align better what the spec suggests.
For this reason do the same what we already do with the Thunderbolt 3
devices and perform the NVM upgrade in two phases. First start the
NVM_AUTH router operation and once the router is added back after the
reset read the status in ROUTER_CS_26 and expose it to the userspace
accordingly.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/tb.h')
| -rw-r--r-- | drivers/thunderbolt/tb.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index a21000649009..3885f2515aae 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -972,6 +972,7 @@ int usb4_switch_nvm_read(struct tb_switch *sw, unsigned int address, void *buf, int usb4_switch_nvm_write(struct tb_switch *sw, unsigned int address, const void *buf, size_t size); int usb4_switch_nvm_authenticate(struct tb_switch *sw); +int usb4_switch_nvm_authenticate_status(struct tb_switch *sw, u32 *status); bool usb4_switch_query_dp_resource(struct tb_switch *sw, struct tb_port *in); int usb4_switch_alloc_dp_resource(struct tb_switch *sw, struct tb_port *in); int usb4_switch_dealloc_dp_resource(struct tb_switch *sw, struct tb_port *in); |