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[idd] recovery: restore fallback display

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Add a protocol-independent recovery channel outside LGMP so clients can
request a usable guest display even when transport versions differ.

Synchronize recovery state with the helper across driver restarts and
restore the configured topology without persisting temporary changes.
This commit is contained in:
Geoffrey McRae
2026-08-11 23:31:11 +10:00
parent 9898e9bcec
commit bacf376305
18 changed files with 1290 additions and 57 deletions
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18
idd/LGIdd/ipc/CPipeServer.h
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@@ -33,18 +33,30 @@ class CDeviceContext;
class CPipeServer : private IPipeEndpointHandler
{
public:
using RecoveryHandler = void (*)(void * opaque,
uint64_t session, uint32_t serial, bool active,
LGPipeMsg::Type result);
private:
CPipeEndpoint m_endpoint;
CSRWLock m_queueLock;
std::vector<LGPipeMsg> m_queue;
bool m_recoveryValid = false;
LGPipeMsg m_recoveryRequest = {};
CSRWLock m_deviceContextLock;
CDeviceContext * m_deviceContext = nullptr;
CDeviceContext * m_deviceContext = nullptr;
CSRWLock m_recoveryLock;
RecoveryHandler m_recoveryHandler = nullptr;
void * m_recoveryOpaque = nullptr;
void WriteMsg(const LGPipeMsg & msg);
void QueueMsgLocked(const LGPipeMsg & msg);
void HandleReloadSettings();
void HandleRecovery(const LGPipeMsg & msg);
void OnPipeConnected() override;
bool OnPipeMessage(const void * message, size_t size) override;
@@ -56,6 +68,8 @@ class CPipeServer : private IPipeEndpointHandler
void DeInit();
void SetDeviceContext(CDeviceContext * context);
void SetRecoveryHandler(RecoveryHandler handler, void * opaque);
void ClearRecoveryHandler(void * opaque);
void SetCursorPos(uint32_t x, uint32_t y);
void SetDisplayMode(
@@ -63,6 +77,8 @@ class CPipeServer : private IPipeEndpointHandler
void SetGPUStatus(bool software);
void ResolutionRejected(uint32_t width, uint32_t height,
uint32_t requiredSizeMiB);
void SetRecovery(
void * owner, uint64_t session, uint32_t serial, bool active);
};
extern CPipeServer g_pipe;