diff options
| author | Sanath S <Sanath.S@amd.com> | 2024-01-13 12:52:48 +0300 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2024-01-22 14:21:06 +0300 |
| commit | 59a54c5f3dbde00b8ad30aef27fe35b1fe07bf5c (patch) | |
| tree | 0d4f433a41c3b6d9dabc1a076d7b45f0c6437f1b /drivers/thunderbolt/tb.h | |
| parent | ec8162b3f0683ae08a21f20517cf49272b07ee0b (diff) | |
| download | linux-59a54c5f3dbde00b8ad30aef27fe35b1fe07bf5c.tar.xz | |
thunderbolt: Reset topology created by the boot firmware
Boot firmware (typically BIOS) might have created tunnels of its own.
The tunnel configuration that it does might be sub-optimal. For instance
it may only support HBR2 monitors so the DisplayPort tunnels it created
may limit Linux graphics drivers. In addition there is an issue on some
AMD based systems where the BIOS does not allocate enough PCIe resources
for future topology extension. By resetting the USB4 topology the PCIe
links will be reset as well allowing Linux to re-allocate.
This aligns the behavior with Windows Connection Manager.
We already issued host router reset for USB4 v2 routers, now extend it
to USB4 v1 routers as well. For pre-USB4 (that's Apple systems) we leave
it as is and continue to discover the existing tunnels.
Suggested-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Sanath S <Sanath.S@amd.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/tb.h')
| -rw-r--r-- | drivers/thunderbolt/tb.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index 2c689e3b02b9..d0dfbf040356 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -483,7 +483,7 @@ struct tb_path { */ struct tb_cm_ops { int (*driver_ready)(struct tb *tb); - int (*start)(struct tb *tb); + int (*start)(struct tb *tb, bool reset); void (*stop)(struct tb *tb); int (*suspend_noirq)(struct tb *tb); int (*resume_noirq)(struct tb *tb); @@ -746,7 +746,7 @@ int tb_xdomain_init(void); void tb_xdomain_exit(void); struct tb *tb_domain_alloc(struct tb_nhi *nhi, int timeout_msec, size_t privsize); -int tb_domain_add(struct tb *tb); +int tb_domain_add(struct tb *tb, bool reset); void tb_domain_remove(struct tb *tb); int tb_domain_suspend_noirq(struct tb *tb); int tb_domain_resume_noirq(struct tb *tb); |