diff options
| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2019-03-26 16:03:48 +0300 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2019-11-02 12:13:31 +0300 |
| commit | a11b88add4401d006ab593c525c0dddc8ace7655 (patch) | |
| tree | f9665916fcc015190ca2614ad3dcee16ed320e33 /drivers/thunderbolt/tb_regs.h | |
| parent | 8afe909b78e16ee4baecf78fd4e404aabf425f8c (diff) | |
thunderbolt: Add bandwidth management for Display Port tunnels
Titan Ridge supports Display Port 1.4 which adds HBR3 (High Bit Rate)
rates that may be up to 8.1 Gb/s over 4 lanes. This translates to
effective data bandwidth of 25.92 Gb/s (as 8/10 encoding is removed by
the DP adapters when going over Thunderbolt fabric). If another high
rate monitor is connected we may need to reduce the bandwidth it
consumes so that it fits into the total 40 Gb/s available on the
Thunderbolt fabric.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/tb_regs.h')
| -rw-r--r-- | drivers/thunderbolt/tb_regs.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/thunderbolt/tb_regs.h b/drivers/thunderbolt/tb_regs.h index aec35e61cc14..7ee45b73c7f7 100644 --- a/drivers/thunderbolt/tb_regs.h +++ b/drivers/thunderbolt/tb_regs.h @@ -255,6 +255,23 @@ struct tb_regs_port_header { #define DP_STATUS_CTRL 0x06 #define DP_STATUS_CTRL_CMHS BIT(25) #define DP_STATUS_CTRL_UF BIT(26) +#define DP_COMMON_CAP 0x07 +/* + * DP_COMMON_CAP offsets work also for DP_LOCAL_CAP and DP_REMOTE_CAP + * with exception of DPRX done. + */ +#define DP_COMMON_CAP_RATE_MASK GENMASK(11, 8) +#define DP_COMMON_CAP_RATE_SHIFT 8 +#define DP_COMMON_CAP_RATE_RBR 0x0 +#define DP_COMMON_CAP_RATE_HBR 0x1 +#define DP_COMMON_CAP_RATE_HBR2 0x2 +#define DP_COMMON_CAP_RATE_HBR3 0x3 +#define DP_COMMON_CAP_LANES_MASK GENMASK(14, 12) +#define DP_COMMON_CAP_LANES_SHIFT 12 +#define DP_COMMON_CAP_1_LANE 0x0 +#define DP_COMMON_CAP_2_LANES 0x1 +#define DP_COMMON_CAP_4_LANES 0x2 +#define DP_COMMON_CAP_DPRX_DONE BIT(31) /* PCIe adapter registers */ #define ADP_PCIE_CS_0 0x00 |