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[client/idd] input: synchronize keyboard LEDs

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Report guest HID keyboard LED state from LGInput to LGIdd and
publish it with the LGMP input endpoint status.

Forward SPICE modifier updates through the same provider state so evdev
can synchronize physical keyboard LEDs across transport changes and
reconnects.

Bump the versioned pipe and KVMFR input status contracts for the new
feedback state.

Accept earlier LGMP input status versions without LED feedback so the
client retains input while the guest driver is being upgraded.
This commit is contained in:
Geoffrey McRae
2026-08-21 05:06:59 +10:00
parent 1a5bdc14aa
commit 71733433ed
20 changed files with 425 additions and 44 deletions
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28
common/include/common/KVMFRInput.h
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@@ -28,7 +28,8 @@
#include <stddef.h>
#include <stdint.h>
#define KVMFR_INPUT_VERSION 2
#define KVMFR_INPUT_VERSION 3
#define KVMFR_INPUT_KEYBOARD_LEDS_VERSION 3
#define KVMFR_INPUT_STREAM_VERSION 1
#define KVMFR_INPUT_STREAM_ENDPOINT_COUNT 8
#define KVMFR_INPUT_STREAM_SLOT_COUNT 128
@@ -122,8 +123,20 @@ typedef uint32_t KVMFRInputCapabilityFlags;
enum
{
KVMFR_INPUT_STATUS_AVAILABLE = 0x1,
KVMFR_INPUT_STATUS_HAS_OWNER = 0x2,
KVMFR_INPUT_KEYBOARD_LED_NUM_LOCK = 0x1,
KVMFR_INPUT_KEYBOARD_LED_CAPS_LOCK = 0x2,
KVMFR_INPUT_KEYBOARD_LED_SCROLL_LOCK = 0x4,
KVMFR_INPUT_KEYBOARD_LED_COMPOSE = 0x8,
KVMFR_INPUT_KEYBOARD_LED_KANA = 0x10,
};
typedef uint8_t KVMFRInputKeyboardLEDFlags;
enum
{
KVMFR_INPUT_STATUS_AVAILABLE = 0x1,
KVMFR_INPUT_STATUS_HAS_OWNER = 0x2,
KVMFR_INPUT_STATUS_KEYBOARD_LEDS_VALID = 0x4,
};
typedef uint32_t KVMFRInputStatusFlags;
@@ -169,7 +182,10 @@ typedef struct KVMFRInputStatus
uint32_t streamVersion;
uint32_t streamEndpointCount;
uint32_t streamGeneration;
uint32_t streamReserved[5];
// USB HID keyboard LED bits; valid only when the status flag is set.
uint8_t keyboardLEDs;
uint8_t statusReserved[3];
uint32_t streamReserved[4];
KVMFRInputStreamEndpoint streamEndpoint[
KVMFR_INPUT_STREAM_ENDPOINT_COUNT];
}
@@ -192,6 +208,8 @@ static_assert(sizeof(KVMFRInputStreamEndpoint) == 48,
"KVMFR input stream endpoint layout changed");
static_assert(offsetof(KVMFRInputStatus, streamVersion) == 32,
"KVMFR input status stream layout changed");
static_assert(offsetof(KVMFRInputStatus, keyboardLEDs) == 44,
"KVMFR input status keyboard LED layout changed");
static_assert(offsetof(KVMFRInputStatus, streamEndpoint) == 64,
"KVMFR input stream discovery layout changed");
static_assert(sizeof(KVMFRInputStatus) == 448,
@@ -215,6 +233,8 @@ _Static_assert(sizeof(KVMFRInputStreamEndpoint) == 48,
"KVMFR input stream endpoint layout changed");
_Static_assert(offsetof(KVMFRInputStatus, streamVersion) == 32,
"KVMFR input status stream layout changed");
_Static_assert(offsetof(KVMFRInputStatus, keyboardLEDs) == 44,
"KVMFR input status keyboard LED layout changed");
_Static_assert(offsetof(KVMFRInputStatus, streamEndpoint) == 64,
"KVMFR input stream discovery layout changed");
_Static_assert(sizeof(KVMFRInputStatus) == 448,