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| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2024-01-26 15:55:55 +0200 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2024-02-26 09:12:12 +0200 |
| commit | a75e0684efe567ae5f6a8e91a8360c4c1773cf3a (patch) | |
| tree | 90242375d89ae4745eac9a83aeef5171d2618057 /drivers/thunderbolt/tb.h | |
| parent | b4734507ac55cc7ea1380e20e83f60fcd7031955 (diff) | |
| download | linux-a75e0684efe567ae5f6a8e91a8360c4c1773cf3a.tar.gz linux-a75e0684efe567ae5f6a8e91a8360c4c1773cf3a.tar.bz2 linux-a75e0684efe567ae5f6a8e91a8360c4c1773cf3a.zip | |
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/tb.h')
| -rw-r--r-- | drivers/thunderbolt/tb.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index 1bbbeb034e0e..8e87d1a0005c 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -23,6 +23,8 @@ #define QUIRK_FORCE_POWER_LINK_CONTROLLER BIT(0) /* Disable CLx if not supported */ #define QUIRK_NO_CLX BIT(1) +/* Need to keep power on while USB4 port is in redrive mode */ +#define QUIRK_KEEP_POWER_IN_DP_REDRIVE BIT(2) /** * struct tb_nvm - Structure holding NVM information @@ -265,6 +267,7 @@ struct tb_bandwidth_group { * @group_list: The adapter is linked to the group's list of ports through this * @max_bw: Maximum possible bandwidth through this adapter if set to * non-zero. + * @redrive: For DP IN, if true the adapter is in redrive mode. * * In USB4 terminology this structure represents an adapter (protocol or * lane adapter). @@ -293,6 +296,7 @@ struct tb_port { struct tb_bandwidth_group *group; struct list_head group_list; unsigned int max_bw; + bool redrive; }; /** |