diff options
| author | Ivan Vecera <ivecera@redhat.com> | 2026-01-14 13:27:24 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-01-19 12:04:53 -0800 |
| commit | b1f99cc8863847676d4a7329ffb668a030150d99 (patch) | |
| tree | 9f8436bcafa6d13fdea1fc9abcf947b7ffe0c53f /include | |
| parent | d321d505edb64286bae0e464574d0fd553e31adc (diff) | |
dpll: add dpll_device op to get supported modes
Currently, the DPLL subsystem assumes that the only supported mode is
the one currently active on the device. When dpll_msg_add_mode_supported()
is called, it relies on ops->mode_get() and reports that single mode
to userspace. This prevents users from discovering other modes the device
might be capable of.
Add a new callback .supported_modes_get() to struct dpll_device_ops. This
allows drivers to populate a bitmap indicating all modes supported by
the hardware.
Update dpll_msg_add_mode_supported() to utilize this new callback:
* if ops->supported_modes_get is defined, use it to retrieve the full
bitmap of supported modes.
* if not defined, fall back to the existing behavior: retrieve
the current mode via ops->mode_get and set the corresponding bit
in the bitmap.
Finally, iterate over the bitmap and add a DPLL_A_MODE_SUPPORTED netlink
attribute for every set bit, accurately reporting the device's capabilities
to userspace.
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Link: https://patch.msgid.link/20260114122726.120303-2-ivecera@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/dpll.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/dpll.h b/include/linux/dpll.h index 562f520b23c2..912a2ca3e0ee 100644 --- a/include/linux/dpll.h +++ b/include/linux/dpll.h @@ -20,6 +20,9 @@ struct dpll_pin_esync; struct dpll_device_ops { int (*mode_get)(const struct dpll_device *dpll, void *dpll_priv, enum dpll_mode *mode, struct netlink_ext_ack *extack); + int (*supported_modes_get)(const struct dpll_device *dpll, + void *dpll_priv, unsigned long *modes, + struct netlink_ext_ack *extack); int (*lock_status_get)(const struct dpll_device *dpll, void *dpll_priv, enum dpll_lock_status *status, enum dpll_lock_status_error *status_error, |