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| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2024-01-26 16:55:55 +0300 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2024-02-26 10:12:12 +0300 |
| commit | a75e0684efe567ae5f6a8e91a8360c4c1773cf3a (patch) | |
| tree | 90242375d89ae4745eac9a83aeef5171d2618057 /drivers/thunderbolt/quirks.c | |
| parent | b4734507ac55cc7ea1380e20e83f60fcd7031955 (diff) | |
| download | linux-a75e0684efe567ae5f6a8e91a8360c4c1773cf3a.tar.xz | |
thunderbolt: Keep the domain powered when USB4 port is in redrive mode
If a DiplayPort cable is directly connected to the host routers USB4
port, there is no tunnel involved but the port is in "redrive" mode
meaning that it is re-driving the DisplayPort signals from its
DisplayPort source. In this case we need to keep the domain powered on
otherwise once the domain enters D3cold the connected monitor blanks
too.
Since this happens only on Intel Barlow Ridge add a quirk that takes
runtime PM reference if we detect that the USB4 port entered redrive
mode (and release it once it exits the mode).
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/quirks.c')
| -rw-r--r-- | drivers/thunderbolt/quirks.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/thunderbolt/quirks.c b/drivers/thunderbolt/quirks.c index e6bfa63b40ae..e81de9c30eac 100644 --- a/drivers/thunderbolt/quirks.c +++ b/drivers/thunderbolt/quirks.c @@ -43,6 +43,12 @@ static void quirk_usb3_maximum_bandwidth(struct tb_switch *sw) } } +static void quirk_block_rpm_in_redrive(struct tb_switch *sw) +{ + sw->quirks |= QUIRK_KEEP_POWER_IN_DP_REDRIVE; + tb_sw_dbg(sw, "preventing runtime PM in DP redrive mode\n"); +} + struct tb_quirk { u16 hw_vendor_id; u16 hw_device_id; @@ -87,6 +93,14 @@ static const struct tb_quirk tb_quirks[] = { { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HUB_40G_BRIDGE, 0x0000, 0x0000, quirk_usb3_maximum_bandwidth }, /* + * Block Runtime PM in DP redrive mode for Intel Barlow Ridge host + * controllers. + */ + { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_80G_NHI, 0x0000, 0x0000, + quirk_block_rpm_in_redrive }, + { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_40G_NHI, 0x0000, 0x0000, + quirk_block_rpm_in_redrive }, + /* * CLx is not supported on AMD USB4 Yellow Carp and Pink Sardine platforms. */ { 0x0438, 0x0208, 0x0000, 0x0000, quirk_clx_disable }, |