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

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Date: Fri, 7 Jun 2024 09:01:00 -0600
From: Jeffrey Hugo <quic_jhugo@...cinc.com>
To: Slark Xiao <slark_xiao@....com>, <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>
Subject: Re: [PATCH v1 1/2] bus: mhi: host: Import link_id item

$Subject says this is patch 1 of 2, but I don't see a second patch nor a 
cover letter.

On 6/7/2024 4:01 AM, Slark Xiao wrote:
> 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;
>   };
>   
>   /**

None of this is actually used.  Dead code is generally not accepted.

-Jeff