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- From 5f7c5e1c0d7a79be144e5efc1f24728ddd7fc25c Mon Sep 17 00:00:00 2001
- From: Robert Marko <[email protected]>
- Date: Sat, 5 Nov 2022 20:02:56 +0100
- Subject: [PATCH 1/2] bus: mhi: core: add SBL state callback
- Add support for SBL state callback in MHI core.
- It is required for ath11k MHI devices in order to be able to set QRTR
- instance ID in the SBL state so that QRTR instance ID-s dont conflict in
- case of multiple PCI/MHI cards or AHB + PCI/MHI card.
- Setting QRTR instance ID is only possible in SBL state and there is
- currently no way to ensure that we are in that state, so provide a
- callback that the controller can trigger off.
- Signed-off-by: Robert Marko <[email protected]>
- ---
- drivers/bus/mhi/host/main.c | 1 +
- include/linux/mhi.h | 2 ++
- 2 files changed, 3 insertions(+)
- --- a/drivers/bus/mhi/host/main.c
- +++ b/drivers/bus/mhi/host/main.c
- @@ -906,6 +906,7 @@ int mhi_process_ctrl_ev_ring(struct mhi_
- switch (event) {
- case MHI_EE_SBL:
- st = DEV_ST_TRANSITION_SBL;
- + mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_EE_SBL_MODE);
- break;
- case MHI_EE_WFW:
- case MHI_EE_AMSS:
- --- a/include/linux/mhi.h
- +++ b/include/linux/mhi.h
- @@ -34,6 +34,7 @@ struct mhi_buf_info;
- * @MHI_CB_SYS_ERROR: MHI device entered error state (may recover)
- * @MHI_CB_FATAL_ERROR: MHI device entered fatal error state
- * @MHI_CB_BW_REQ: Received a bandwidth switch request from device
- + * @MHI_CB_EE_SBL_MODE: MHI device entered SBL mode
- */
- enum mhi_callback {
- MHI_CB_IDLE,
- @@ -45,6 +46,7 @@ enum mhi_callback {
- MHI_CB_SYS_ERROR,
- MHI_CB_FATAL_ERROR,
- MHI_CB_BW_REQ,
- + MHI_CB_EE_SBL_MODE,
- };
-
- /**
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