diff options
| author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2023-10-25 14:49:29 +0300 |
|---|---|---|
| committer | Bjorn Andersson <andersson@kernel.org> | 2023-12-07 07:48:46 -0800 |
| commit | 1d103d6af241dbfc7e11eb9a46dff65db257a37f (patch) | |
| tree | f0ec3a20f291a20cc3a22602d1fd901ffe36eedd /drivers/usb/typec | |
| parent | 6da02af3f910bbcdd2914050cfcab1a9d7980494 (diff) | |
usb: typec: ucsi: fix UCSI on buggy Qualcomm devices
On sevral Qualcomm platforms (SC8180X, SM8350, SC8280XP) a call to
UCSI_GET_PDOS for non-PD partners will cause a firmware crash with no
easy way to recover from it. Since we have no easy way to determine
whether the partner really has PD support, shortcut UCSI_GET_PDOS on
such platforms. This allows us to enable UCSI support on such devices.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20231025115620.905538-2-dmitry.baryshkov@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Diffstat (limited to 'drivers/usb/typec')
| -rw-r--r-- | drivers/usb/typec/ucsi/ucsi.c | 3 | ||||
| -rw-r--r-- | drivers/usb/typec/ucsi/ucsi.h | 3 | ||||
| -rw-r--r-- | drivers/usb/typec/ucsi/ucsi_glink.c | 13 |
3 files changed, 19 insertions, 0 deletions
diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c index 61b64558f96c..5392ec698959 100644 --- a/drivers/usb/typec/ucsi/ucsi.c +++ b/drivers/usb/typec/ucsi/ucsi.c @@ -578,6 +578,9 @@ static int ucsi_read_pdos(struct ucsi_connector *con, u64 command; int ret; + if (ucsi->quirks & UCSI_NO_PARTNER_PDOS) + return 0; + command = UCSI_COMMAND(UCSI_GET_PDOS) | UCSI_CONNECTOR_NUMBER(con->num); command |= UCSI_GET_PDOS_PARTNER_PDO(is_partner); command |= UCSI_GET_PDOS_PDO_OFFSET(offset); diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h index 474315a72c77..6478016d5cb8 100644 --- a/drivers/usb/typec/ucsi/ucsi.h +++ b/drivers/usb/typec/ucsi/ucsi.h @@ -317,6 +317,9 @@ struct ucsi { #define EVENT_PENDING 0 #define COMMAND_PENDING 1 #define ACK_PENDING 2 + + unsigned long quirks; +#define UCSI_NO_PARTNER_PDOS BIT(0) /* Don't read partner's PDOs */ }; #define UCSI_MAX_SVID 5 diff --git a/drivers/usb/typec/ucsi/ucsi_glink.c b/drivers/usb/typec/ucsi/ucsi_glink.c index db6e248f8208..a94e2df6fd45 100644 --- a/drivers/usb/typec/ucsi/ucsi_glink.c +++ b/drivers/usb/typec/ucsi/ucsi_glink.c @@ -6,6 +6,7 @@ #include <linux/auxiliary_bus.h> #include <linux/module.h> #include <linux/mutex.h> +#include <linux/of_device.h> #include <linux/property.h> #include <linux/soc/qcom/pdr.h> #include <linux/usb/typec_mux.h> @@ -296,11 +297,19 @@ static void pmic_glink_ucsi_destroy(void *data) mutex_unlock(&ucsi->lock); } +static const struct of_device_id pmic_glink_ucsi_of_quirks[] = { + { .compatible = "qcom,sc8180x-pmic-glink", .data = (void *)UCSI_NO_PARTNER_PDOS, }, + { .compatible = "qcom,sc8280xp-pmic-glink", .data = (void *)UCSI_NO_PARTNER_PDOS, }, + { .compatible = "qcom,sm8350-pmic-glink", .data = (void *)UCSI_NO_PARTNER_PDOS, }, + {} +}; + static int pmic_glink_ucsi_probe(struct auxiliary_device *adev, const struct auxiliary_device_id *id) { struct pmic_glink_ucsi *ucsi; struct device *dev = &adev->dev; + const struct of_device_id *match; struct fwnode_handle *fwnode; int ret; @@ -327,6 +336,10 @@ static int pmic_glink_ucsi_probe(struct auxiliary_device *adev, if (ret) return ret; + match = of_match_device(pmic_glink_ucsi_of_quirks, dev->parent); + if (match) + ucsi->ucsi->quirks = (unsigned long)match->data; + ucsi_set_drvdata(ucsi->ucsi, ucsi); device_for_each_child_node(dev, fwnode) { |