diff options
author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2022-11-06 14:07:43 +0300 |
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committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2023-06-16 09:53:28 +0300 |
commit | fd4d58d1fef9ae9b0ee235eaad73d2e0a6a73025 (patch) | |
tree | b7f44a45ef98c391c264e16352b634469e98eebb /drivers/thunderbolt/clx.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/clx.c')
-rw-r--r-- | drivers/thunderbolt/clx.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/drivers/thunderbolt/clx.c b/drivers/thunderbolt/clx.c index 604cceb23659..13d217ae98e6 100644 --- a/drivers/thunderbolt/clx.c +++ b/drivers/thunderbolt/clx.c @@ -17,17 +17,22 @@ MODULE_PARM_DESC(clx, "allow low power states on the high-speed lanes (default: static const char *clx_name(unsigned int clx) { - if (!clx) - return "disabled"; - - if (clx & TB_CL2) + switch (clx) { + case TB_CL0S | TB_CL1 | TB_CL2: return "CL0s/CL1/CL2"; - if (clx & TB_CL1) + case TB_CL1 | TB_CL2: + return "CL1/CL2"; + case TB_CL0S | TB_CL2: + return "CL0s/CL2"; + case TB_CL0S | TB_CL1: return "CL0s/CL1"; - if (clx & TB_CL0S) + case TB_CL0S: return "CL0s"; - - return "unknown"; + case 0: + return "disabled"; + default: + return "unknown"; + } } static int tb_port_pm_secondary_set(struct tb_port *port, bool secondary) @@ -104,6 +109,8 @@ static int tb_port_clx_set(struct tb_port *port, unsigned int clx, bool enable) mask |= LANE_ADP_CS_1_CL0S_ENABLE; if (clx & TB_CL1) mask |= LANE_ADP_CS_1_CL1_ENABLE; + if (clx & TB_CL2) + mask |= LANE_ADP_CS_1_CL2_ENABLE; if (!mask) return -EOPNOTSUPP; @@ -291,8 +298,6 @@ bool tb_switch_clx_is_supported(const struct tb_switch *sw) static bool validate_mask(unsigned int clx) { /* Previous states need to be enabled */ - if (clx & TB_CL2) - return (clx & (TB_CL0S | TB_CL1)) == (TB_CL0S | TB_CL1); if (clx & TB_CL1) return (clx & TB_CL0S) == TB_CL0S; return true; @@ -331,8 +336,10 @@ int tb_switch_clx_enable(struct tb_switch *sw, unsigned int clx) !tb_switch_clx_is_supported(sw)) return 0; - /* CL2 is not yet supported */ - if (clx & TB_CL2) + /* Only support CL2 for v2 routers */ + if ((clx & TB_CL2) && + (usb4_switch_version(parent_sw) < 2 || + usb4_switch_version(sw) < 2)) return -EOPNOTSUPP; ret = tb_switch_pm_secondary_resolve(sw); |