linux-kernel - [PATCH v1 1/2] bus: mhi: host: Import link

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Date: Fri,  7 Jun 2024 18:01:14 +0800
From: Slark Xiao <slark_xiao@....com>
To: manivannan.sadhasivam@...aro.org,
	loic.poulain@...aro.org,
	quic_qianyu@...cinc.com
Cc: mhi@...ts.linux.dev,
	linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Slark Xiao <slark_xiao@....com>
Subject: [PATCH v1 1/2] bus: mhi: host: Import link_id item

For SDX72 MBIM mode, it starts data mux id from 112 instead of 0.
This would lead to device can't ping outside successfully.
Also MBIM side would report "bad packet session (112)".
So we add a link id default value for SDX72.

Signed-off-by: Slark Xiao <slark_xiao@....com>
---
 drivers/bus/mhi/host/pci_generic.c | 3 +++
 include/linux/mhi.h                | 1 +
 2 files changed, 4 insertions(+)

diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c
index 0b483c7c76a1..1f9de2730766 100644
--- a/drivers/bus/mhi/host/pci_generic.c
+++ b/drivers/bus/mhi/host/pci_generic.c
@@ -53,6 +53,7 @@ struct mhi_pci_dev_info {
 	unsigned int dma_data_width;
 	unsigned int mru_default;
 	bool sideband_wake;
+	unsigned int link_default;
 };
 
 #define MHI_CHANNEL_CONFIG_UL(ch_num, ch_name, el_count, ev_ring) \
@@ -469,6 +470,7 @@ static const struct mhi_pci_dev_info mhi_foxconn_sdx72_info = {
 	.dma_data_width = 32,
 	.mru_default = 32768,
 	.sideband_wake = false,
+	.link_default = 112,
 };
 
 static const struct mhi_channel_config mhi_mv3x_channels[] = {
@@ -1035,6 +1037,7 @@ static int mhi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	mhi_cntrl->runtime_get = mhi_pci_runtime_get;
 	mhi_cntrl->runtime_put = mhi_pci_runtime_put;
 	mhi_cntrl->mru = info->mru_default;
+	mhi_cntrl->link_id = info->link_default;
 
 	if (info->edl_trigger)
 		mhi_cntrl->edl_trigger = mhi_pci_generic_edl_trigger;
diff --git a/include/linux/mhi.h b/include/linux/mhi.h
index b573f15762f8..4da10b99c96e 100644
--- a/include/linux/mhi.h
+++ b/include/linux/mhi.h
@@ -445,6 +445,7 @@ struct mhi_controller {
 	bool wake_set;
 	unsigned long irq_flags;
 	u32 mru;
+	u32 link_id;
 };
 
 /**
-- 
2.25.1