linux-kernel - Re: Re:Re: [PATCH] bus: mhi: host: Add Foxconn SDX72 related support

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Date: Wed, 15 May 2024 09:43:15 +0200
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Slark Xiao <slark_xiao@....com>
Cc: loic.poulain@...aro.org, mhi@...ts.linux.dev,
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Re:Re: [PATCH] bus: mhi: host: Add Foxconn SDX72 related support

On Wed, May 15, 2024 at 09:43:53AM +0800, Slark Xiao wrote:
> 
> Send again with text mode.
> At 2024-05-15 09:29:20, "Slark Xiao" <slark_xiao@....com> wrote:
> >At 2024-05-14 22:37:41, "Manivannan Sadhasivam" <manivannan.sadhasivam@...aro.org> wrote:
> >>On Fri, May 10, 2024 at 11:26:57AM +0800, Slark Xiao wrote:
> >>> Align with Qcom SDX72, add ready timeout item for Foxconn SDX72.
> >>> And also, add firehose support since SDX72.
> >>> 
> >>> Signed-off-by: Slark Xiao <slark_xiao@....com>
> >>> ---
> >>>  drivers/bus/mhi/host/pci_generic.c | 31 ++++++++++++++++++++++++++++++
> >>>  1 file changed, 31 insertions(+)
> >>> 
> >>> diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c
> >>> index 08844ee79654..0fd94c193fc6 100644
> >>> --- a/drivers/bus/mhi/host/pci_generic.c
> >>> +++ b/drivers/bus/mhi/host/pci_generic.c
> >>> @@ -399,6 +399,8 @@ static const struct mhi_channel_config mhi_foxconn_sdx55_channels[] = {
> >>>  	MHI_CHANNEL_CONFIG_DL(13, "MBIM", 32, 0),
> >>>  	MHI_CHANNEL_CONFIG_UL(32, "DUN", 32, 0),
> >>>  	MHI_CHANNEL_CONFIG_DL(33, "DUN", 32, 0),
> >>> +	MHI_CHANNEL_CONFIG_UL_FP(34, "FIREHOSE", 32, 0),
> >>> +	MHI_CHANNEL_CONFIG_DL_FP(35, "FIREHOSE", 32, 0),
> >>
> >>This means SDX55 is also supporting FIREHOSE channels, which is not true I
> >>believe.
> >Actually, I just verified it with my sdx55 and the answer is Yes. These channels
> >are common settings for Qcom device which support PCIe mode. BTW, the
> >default settings of Qcom and Quectel support firehose for their sdx55 products.
> >>
> >>>  	MHI_CHANNEL_CONFIG_HW_UL(100, "IP_HW0_MBIM", 128, 2),
> >>>  	MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0_MBIM", 128, 3),
> >>>  };
> >>> @@ -419,6 +421,16 @@ static const struct mhi_controller_config modem_foxconn_sdx55_config = {
> >>>  	.event_cfg = mhi_foxconn_sdx55_events,
> >>>  };
> >>>  
> >>> +static const struct mhi_controller_config modem_foxconn_sdx72_config = {
> >>> +	.max_channels = 128,
> >>> +	.timeout_ms = 20000,
> >>> +	.ready_timeout_ms = 50000,
> >>> +	.num_channels = ARRAY_SIZE(mhi_foxconn_sdx55_channels),
> >>> +	.ch_cfg = mhi_foxconn_sdx55_channels,
> >>> +	.num_events = ARRAY_SIZE(mhi_foxconn_sdx55_events),
> >>> +	.event_cfg = mhi_foxconn_sdx55_events,
> >>> +};
> >>> +
> >>>  static const struct mhi_pci_dev_info mhi_foxconn_sdx24_info = {
> >>>  	.name = "foxconn-sdx24",
> >>>  	.config = &modem_foxconn_sdx55_config,
> >>> @@ -448,6 +460,16 @@ static const struct mhi_pci_dev_info mhi_foxconn_sdx65_info = {
> >>>  	.sideband_wake = false,
> >>>  };
> >>>  
> >>> +static const struct mhi_pci_dev_info mhi_foxconn_sdx72_info = {
> >>> +	.name = "foxconn-sdx72",
> >>> +	.edl = "qcom/sdx72m/xbl_s_devprg_ns.melf",
> >>
> >>What is '.melf'? Is the firmware available somewhere? Did you plan to upstream
> >>it to linux-firmware?
> >>
> >This file similar with "edl.mbn". In SDX72 product, the default "edl" file name is
> >"xbl_s_devprg_ns.melf". Currently we don't plan to upstream it to linux-firmware
> >since 2 reasons: 1: we share the same fold name sdx72m with qcom or other vendors
> >2: this file may be changed since sdx72 product still under developing in our side. we
> >may change the base line according to QCOM release.
> >>- Mani
> >>
> And I want to say, the os or driver can't recover device with this "edl" file only. This file
> only used when device needs to be changed to firehose mode. After that, we need
> a tool and a complete firmware package to do the firehose download. Unfortunately,
> there is no open source tool to support this download. Even Qcom PCAT tool only
> supports their own VID/PID with their own driver. So the function of mhi driver is:
> Put device into firehose mode and enumerate the wwan0firehose0 port. The rest
> shall be done by enduser themselves. 

Can't you use QDL tool? https://github.com/linux-msm/qdl

- Mani

-- 
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