2022-10-18 20:26:34 +00:00
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From 5f7c5e1c0d7a79be144e5efc1f24728ddd7fc25c Mon Sep 17 00:00:00 2001
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From: Robert Marko <robimarko@gmail.com>
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Date: Sat, 5 Nov 2022 20:02:56 +0100
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Subject: [PATCH 1/2] bus: mhi: core: add SBL state callback
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Add support for SBL state callback in MHI core.
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It is required for ath11k MHI devices in order to be able to set QRTR
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instance ID in the SBL state so that QRTR instance ID-s dont conflict in
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case of multiple PCI/MHI cards or AHB + PCI/MHI card.
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Setting QRTR instance ID is only possible in SBL state and there is
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currently no way to ensure that we are in that state, so provide a
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callback that the controller can trigger off.
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Signed-off-by: Robert Marko <robimarko@gmail.com>
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---
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drivers/bus/mhi/host/main.c | 1 +
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include/linux/mhi.h | 2 ++
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2 files changed, 3 insertions(+)
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--- a/drivers/bus/mhi/host/main.c
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+++ b/drivers/bus/mhi/host/main.c
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2024-02-02 21:56:39 +00:00
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@@ -905,6 +905,7 @@ int mhi_process_ctrl_ev_ring(struct mhi_
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2022-10-18 20:26:34 +00:00
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switch (event) {
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case MHI_EE_SBL:
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st = DEV_ST_TRANSITION_SBL;
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+ mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_EE_SBL_MODE);
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break;
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case MHI_EE_WFW:
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case MHI_EE_AMSS:
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--- a/include/linux/mhi.h
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+++ b/include/linux/mhi.h
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@@ -34,6 +34,7 @@ struct mhi_buf_info;
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* @MHI_CB_SYS_ERROR: MHI device entered error state (may recover)
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* @MHI_CB_FATAL_ERROR: MHI device entered fatal error state
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* @MHI_CB_BW_REQ: Received a bandwidth switch request from device
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+ * @MHI_CB_EE_SBL_MODE: MHI device entered SBL mode
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*/
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enum mhi_callback {
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MHI_CB_IDLE,
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@@ -45,6 +46,7 @@ enum mhi_callback {
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MHI_CB_SYS_ERROR,
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MHI_CB_FATAL_ERROR,
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MHI_CB_BW_REQ,
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+ MHI_CB_EE_SBL_MODE,
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};
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/**
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