diff options
| author | Mario Limonciello <mario.limonciello@amd.com> | 2023-05-18 19:11:50 +0300 |
|---|---|---|
| committer | Wolfram Sang <wsa@kernel.org> | 2023-06-14 11:47:11 +0300 |
| commit | a7fbfd44c0204f0629288edfd0d77829edb4a2f8 (patch) | |
| tree | a8e40f4636b81431edffada59af73853543c5756 /drivers/usb | |
| parent | 3152893c04d2c03bf752a0866d6bf8fae91779c6 (diff) | |
| download | linux-a7fbfd44c0204f0629288edfd0d77829edb4a2f8.tar.xz | |
usb: typec: ucsi: Mark dGPUs as DEVICE scope
power_supply_is_system_supplied() checks whether any power
supplies are present that aren't batteries to decide whether
the system is running on DC or AC. Downstream drivers use
this to make performance decisions.
Navi dGPUs include an UCSI function that has been exported
since commit 17631e8ca2d3 ("i2c: designware: Add driver
support for AMD NAVI GPU").
This UCSI function registers a power supply since commit
992a60ed0d5e ("usb: typec: ucsi: register with power_supply class")
but this is not a system power supply.
As the power supply for a dGPU is only for powering devices connected
to dGPU, create a device property to indicate that the UCSI endpoint
is only for the scope of `POWER_SUPPLY_SCOPE_DEVICE`.
Link: https://lore.kernel.org/lkml/20230516182541.5836-2-mario.limonciello@amd.com/
Reviewed-by: Evan Quan <evan.quan@amd.com>
Tested-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Acked-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/typec/ucsi/psy.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/usb/typec/ucsi/psy.c b/drivers/usb/typec/ucsi/psy.c index 56bf56517f75..384b42267f1f 100644 --- a/drivers/usb/typec/ucsi/psy.c +++ b/drivers/usb/typec/ucsi/psy.c @@ -27,8 +27,20 @@ static enum power_supply_property ucsi_psy_props[] = { POWER_SUPPLY_PROP_VOLTAGE_NOW, POWER_SUPPLY_PROP_CURRENT_MAX, POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_SCOPE, }; +static int ucsi_psy_get_scope(struct ucsi_connector *con, + union power_supply_propval *val) +{ + u8 scope = POWER_SUPPLY_SCOPE_UNKNOWN; + struct device *dev = con->ucsi->dev; + + device_property_read_u8(dev, "scope", &scope); + val->intval = scope; + return 0; +} + static int ucsi_psy_get_online(struct ucsi_connector *con, union power_supply_propval *val) { @@ -194,6 +206,8 @@ static int ucsi_psy_get_prop(struct power_supply *psy, return ucsi_psy_get_current_max(con, val); case POWER_SUPPLY_PROP_CURRENT_NOW: return ucsi_psy_get_current_now(con, val); + case POWER_SUPPLY_PROP_SCOPE: + return ucsi_psy_get_scope(con, val); default: return -EINVAL; } |