diff options
| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2022-08-15 19:59:43 +0300 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2022-09-05 09:02:16 +0300 |
| commit | b12d2955e732866dd8c73154992332a01e7224ed (patch) | |
| tree | 54b7fe61466fe8784295ff969f263b500f7df5f5 /drivers/thunderbolt | |
| parent | 3846d011403b57190b6b3e917cc8b3ab810fa293 (diff) | |
| download | linux-b12d2955e732866dd8c73154992332a01e7224ed.tar.bz2 | |
thunderbolt: Add helper to check if CL states are enabled on port
We will need this when enabling lane margining support.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt')
| -rw-r--r-- | drivers/thunderbolt/switch.c | 28 | ||||
| -rw-r--r-- | drivers/thunderbolt/tb.h | 1 | ||||
| -rw-r--r-- | drivers/thunderbolt/tb_regs.h | 1 |
3 files changed, 30 insertions, 0 deletions
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index 0671f5361b5b..bd815e2cc6ec 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -1330,6 +1330,34 @@ static int tb_port_clx_enable(struct tb_port *port, enum tb_clx clx) return __tb_port_clx_set(port, clx, true); } +/** + * tb_port_is_clx_enabled() - Is given CL state enabled + * @port: USB4 port to check + * @clx_mask: Mask of CL states to check + * + * Returns true if any of the given CL states is enabled for @port. + */ +bool tb_port_is_clx_enabled(struct tb_port *port, unsigned int clx_mask) +{ + u32 val, mask = 0; + int ret; + + if (!tb_port_clx_supported(port, clx_mask)) + return false; + + if (clx_mask & TB_CL1) + mask |= LANE_ADP_CS_1_CL0S_ENABLE | LANE_ADP_CS_1_CL1_ENABLE; + if (clx_mask & TB_CL2) + mask |= LANE_ADP_CS_1_CL2_ENABLE; + + ret = tb_port_read(port, &val, TB_CFG_PORT, + port->cap_phy + LANE_ADP_CS_1, 1); + if (ret) + return false; + + return !!(val & mask); +} + static int tb_port_start_lane_initialization(struct tb_port *port) { int ret; diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index 8555ad9d7234..ded1f1d6c12e 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -1035,6 +1035,7 @@ void tb_port_lane_bonding_disable(struct tb_port *port); int tb_port_wait_for_link_width(struct tb_port *port, int width, int timeout_msec); int tb_port_update_credits(struct tb_port *port); +bool tb_port_is_clx_enabled(struct tb_port *port, enum tb_clx clx); int tb_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec); int tb_switch_find_cap(struct tb_switch *sw, enum tb_switch_cap cap); diff --git a/drivers/thunderbolt/tb_regs.h b/drivers/thunderbolt/tb_regs.h index a45f295533cd..0fe1daa21423 100644 --- a/drivers/thunderbolt/tb_regs.h +++ b/drivers/thunderbolt/tb_regs.h @@ -334,6 +334,7 @@ struct tb_regs_port_header { #define LANE_ADP_CS_1_TARGET_WIDTH_DUAL 0x3 #define LANE_ADP_CS_1_CL0S_ENABLE BIT(10) #define LANE_ADP_CS_1_CL1_ENABLE BIT(11) +#define LANE_ADP_CS_1_CL2_ENABLE BIT(12) #define LANE_ADP_CS_1_LD BIT(14) #define LANE_ADP_CS_1_LB BIT(15) #define LANE_ADP_CS_1_CURRENT_SPEED_MASK GENMASK(19, 16) |