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usb: typec: ucsi: don't retrieve PDOs if not supported

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On systems where the UCSI PDOs are not supported, the UCSI driver is
giving an error message. This can cause users to believe there is a HW
issue with their system when in fact it is working as designed.

Check if PDO_DETAILS are supported as a feature before attempting to
access PDO. If not supported return that zero PDOs are available.

Tested on Lenovo L14 G5 AMD and confirmed with Lenovo FW team that PDOs
are not supported on this platform.

Suggested-by: Diogo Ivo <diogo.ivo@siemens.com>
Suggested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20240609214328.6580-1-mpearson-lenovo@squebb.ca
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mark Pearson 2024-06-09 17:43:18 -04:00 committed by Greg Kroah-Hartman
parent a353686e7f
commit 50a7230a02
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/typec/ucsi/ucsi.c
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@ -646,9 +646,13 @@ static int ucsi_read_pdos(struct ucsi_connector *con,
static int ucsi_get_pdos(struct ucsi_connector *con, enum typec_role role,
int is_partner, u32 *pdos)
{
struct ucsi *ucsi = con->ucsi;
u8 num_pdos;
int ret;
if (!(ucsi->cap.features & UCSI_CAP_PDO_DETAILS))
return 0;
/* UCSI max payload means only getting at most 4 PDOs at a time */
ret = ucsi_read_pdos(con, role, is_partner, pdos, 0, UCSI_MAX_PDOS);
if (ret < 0)