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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
Download Patch File Download Diff File Expand all files Collapse all files

63
idd/LGInput/ipc/CInputPipeClient.cpp
View File

@@ -38,7 +38,15 @@ static constexpr uint16_t HID_CONSUMER_USAGE_VOLUME_DOWN = 0xea;
bool CInputPipeClient::Start()
{
{
CSRWExclusiveLock lock(m_feedbackLock);
m_feedbackReady = false;
}
m_endpoint.Stop();
{
CSRWExclusiveLock lock(m_feedbackLock);
m_feedbackSequence = 0;
}
m_lastSequence = 0;
m_statReceived = 0;
m_statMalformed = 0;
@@ -55,6 +63,10 @@ bool CInputPipeClient::Start()
void CInputPipeClient::Stop()
{
const bool wasRunning = m_endpoint.IsRunning();
{
CSRWExclusiveLock lock(m_feedbackLock);
m_feedbackReady = false;
}
m_endpoint.Stop();
m_lastSequence = 0;
if (wasRunning)
@@ -67,11 +79,22 @@ void CInputPipeClient::Stop()
void CInputPipeClient::OnPipeConnected()
{
m_lastSequence = 0;
{
CSRWExclusiveLock lock(m_feedbackLock);
m_feedbackSequence = 0;
m_feedbackReady = SendKeyboardLEDsLocked();
if (!m_feedbackReady)
DEBUG_WARN("Failed to report LGInput keyboard LEDs");
}
DEBUG_INFO("Connected to the LGIdd input transport");
}
void CInputPipeClient::OnPipeDisconnected()
{
{
CSRWExclusiveLock lock(m_feedbackLock);
m_feedbackReady = false;
}
m_lastSequence = 0;
LogStatistics(true);
CHIDDevice::ResetReports();
@@ -319,6 +342,46 @@ bool CInputPipeClient::SubmitReport(
return true;
}
void CInputPipeClient::UpdateKeyboardLEDs(uint8_t leds)
{
const uint8_t mask =
KVMFR_INPUT_KEYBOARD_LED_NUM_LOCK |
KVMFR_INPUT_KEYBOARD_LED_CAPS_LOCK |
KVMFR_INPUT_KEYBOARD_LED_SCROLL_LOCK |
KVMFR_INPUT_KEYBOARD_LED_COMPOSE |
KVMFR_INPUT_KEYBOARD_LED_KANA;
leds &= mask;
CSRWExclusiveLock lock(m_feedbackLock);
if (m_keyboardLEDs == leds)
return;
m_keyboardLEDs = leds;
if (m_feedbackReady && !SendKeyboardLEDsLocked())
{
m_feedbackReady = false;
DEBUG_WARN("Failed to report LGInput keyboard LEDs");
}
}
bool CInputPipeClient::SendKeyboardLEDsLocked()
{
LGInputPipeMessage message = {};
message.magic = LG_INPUT_PIPE_MAGIC;
message.version = LG_INPUT_PIPE_VERSION;
message.type = LG_INPUT_PIPE_MESSAGE_KEYBOARD_LEDS;
message.payloadSize = sizeof(LGInputPipeKeyboardLEDs);
message.sequence = ++m_feedbackSequence;
const LGInputPipeKeyboardLEDs feedback = { m_keyboardLEDs };
memcpy(message.payload, &feedback, sizeof(feedback));
if (m_endpoint.Send(&message, sizeof(message)))
return true;
--m_feedbackSequence;
return false;
}
void CInputPipeClient::LogStatistics(bool force)
{
const ULONGLONG now = GetTickCount64();