diff options
| author | Gil Fine <gil.fine@intel.com> | 2021-12-17 02:16:38 +0100 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2021-12-22 15:13:14 +0100 |
| commit | a28ec0e165ba2f90568828a2578aaa8540e13bc5 (patch) | |
| tree | 1154cace1b1c8eb49aff7ea6affbc25dd4fd2416 /drivers/thunderbolt/tb.c | |
| parent | thunderbolt: Check return value of kmemdup() in icm_handle_event() (diff) | |
| download | linux-a28ec0e165ba2f90568828a2578aaa8540e13bc5.tar.xz linux-a28ec0e165ba2f90568828a2578aaa8540e13bc5.zip | |
thunderbolt: Add TMU uni-directional mode
Up until Titan Ridge (Thunderbolt 3) device routers only supported
bi-directional mode. In this patch we add to TMU a uni-directional mode.
The uni-directional mode is needed for enabling of low power state of
the link (CLx).
Signed-off-by: Gil Fine <gil.fine@intel.com>
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, 8 insertions, 1 deletions
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c index a231191b06c6..7ed02d86eabd 100644 --- a/drivers/thunderbolt/tb.c +++ b/drivers/thunderbolt/tb.c @@ -221,7 +221,7 @@ static int tb_enable_tmu(struct tb_switch *sw) int ret; /* If it is already enabled in correct mode, don't touch it */ - if (tb_switch_tmu_is_enabled(sw)) + if (tb_switch_tmu_hifi_is_enabled(sw, sw->tmu.unidirectional_request)) return 0; ret = tb_switch_tmu_disable(sw); @@ -669,6 +669,7 @@ static void tb_scan_port(struct tb_port *port) tb_switch_lane_bonding_enable(sw); /* Set the link configured */ tb_switch_configure_link(sw); + tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_HIFI, false); if (tb_enable_tmu(sw)) tb_sw_warn(sw, "failed to enable TMU\n"); @@ -1375,6 +1376,7 @@ static int tb_start(struct tb *tb) return ret; } + tb_switch_tmu_configure(tb->root_switch, TB_SWITCH_TMU_RATE_HIFI, false); /* Enable TMU if it is off */ tb_switch_tmu_enable(tb->root_switch); /* Full scan to discover devices added before the driver was loaded. */ @@ -1418,6 +1420,11 @@ static void tb_restore_children(struct tb_switch *sw) if (sw->is_unplugged) return; + /* + * tb_switch_tmu_configure() was already called when the switch was + * added before entering system sleep or runtime suspend, + * so no need to call it again before enabling TMU. + */ if (tb_enable_tmu(sw)) tb_sw_warn(sw, "failed to restore TMU configuration\n"); |