diff options
| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2022-11-06 14:07:43 +0300 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2023-06-16 09:53:28 +0300 |
| commit | fd4d58d1fef9ae9b0ee235eaad73d2e0a6a73025 (patch) | |
| tree | b7f44a45ef98c391c264e16352b634469e98eebb /drivers/thunderbolt/tb.c | |
| parent | d49b4f043d63bddf4c1836623b8ae800878ed2e3 (diff) | |
| download | linux-fd4d58d1fef9ae9b0ee235eaad73d2e0a6a73025.tar.xz | |
thunderbolt: Enable CL2 low power state
For USB4 v2 routers we can also enable CL2 which allows better power
savings and thermal management than CL0s and CL1.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/tb.c')
| -rw-r--r-- | drivers/thunderbolt/tb.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c index ff034975a87e..79efc85db38b 100644 --- a/drivers/thunderbolt/tb.c +++ b/drivers/thunderbolt/tb.c @@ -244,6 +244,7 @@ static void tb_discover_dp_resources(struct tb *tb) static int tb_enable_clx(struct tb_switch *sw) { struct tb_cm *tcm = tb_priv(sw->tb); + unsigned int clx = TB_CL0S | TB_CL1; const struct tb_tunnel *tunnel; int ret; @@ -275,10 +276,12 @@ static int tb_enable_clx(struct tb_switch *sw) } /* - * CL0s and CL1 are enabled and supported together. - * Silently ignore CLx enabling in case CLx is not supported. + * Initially try with CL2. If that's not supported by the + * topology try with CL0s and CL1 and then give up. */ - ret = tb_switch_clx_enable(sw, TB_CL0S | TB_CL1); + ret = tb_switch_clx_enable(sw, clx | TB_CL2); + if (ret == -EOPNOTSUPP) + ret = tb_switch_clx_enable(sw, clx); return ret == -EOPNOTSUPP ? 0 : ret; } |