Date: Fri, 17 May 2024 17:59:03 +0800 (CST)
From: "Slark Xiao" <slark_xiao@....com>
To: "Manivannan Sadhasivam" <manivannan.sadhasivam@...aro.org>
Cc: "Manivannan Sadhasivam" <mani@...nel.org>, loic.poulain@...aro.org, 
	mhi@...ts.linux.dev, linux-arm-msm@...r.kernel.org, 
	linux-kernel@...r.kernel.org, quic_qianyu@...cinc.com
Subject: Re:Re:Re: Re: Re: Re: [PATCH] bus: mhi: host: Add Foxconn SDX72
 related support


At 2024-05-17 09:09:05, "Slark Xiao" <slark_xiao@....com> wrote:
>
>At 2024-05-16 22:23:46, "Manivannan Sadhasivam" <manivannan.sadhasivam@...aro.org> wrote:
>>On Wed, May 15, 2024 at 08:17:23PM +0800, Slark Xiao wrote:
>>> 
>>> 
>>> At 2024-05-15 19:52:39, "Manivannan Sadhasivam" <mani@...nel.org> wrote:
>>> >On Wed, May 15, 2024 at 04:01:37PM +0800, Slark Xiao wrote:
>>> >> 
>>> >> At 2024-05-15 15:41:19, "Manivannan Sadhasivam" <manivannan.sadhasivam@...aro.org> wrote:
>>> >> >+ Qiang
>>> >> >
>>> >> >On Wed, May 15, 2024 at 09:29:20AM +0800, Slark Xiao 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.
>>> >> >
>>> >> >Qiang, can you please confirm that SDX55 supports FIREHOSE channels?
>>> >> >
>>> >> >> >
>>> >> >> >>  	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.
>>> >> >
>>> >> >Then I would ask you to add support when you have a stable firmware. I do not
>>> >> >want to change the firmware name after some time as it will confuse users.
>>> >> >
>>> >> >- Mani
>>> >> If a stable firmware must be provided, I think I shall change the folder name from qcom to
>>> >> fox, do you agree this?
>>> >
>>> >Even in that case, where can the user find the firmware?
>>> >
>>> I think this edl file could help user let device enter into edl mode(wwan0firehose0).
>>> For PCIE device, there is no opensource tool to support PCIE edl download. If user
>>> could get the tool to do the firehose download, I think it's not hard to get complete firmware
>>> from PC vendor or somewhere else.
>>
>>I was told that Qcom will upstream the PCI support for QDL in the coming weeks.
>>Once that happens (even if a PR), I'll share that with you. Please test it and
>>let me know if that works or not.
>>
>Sure. But I think this shall not the block cause for merging this patch, right?
>Before that PR, we have verified the firehose function in our local with our
>firehose tool which is not open. 
>>And for entering EDL mode, we have recently added support to trigger EDL mode
>>from host [1]. Could you also test that? You just need to add `edl_trigger =
>>true` to the `mhi_pci_dev_info` struct of SDX72 and trigger EDL mode from host
>>by:
>>
>>echo 1 > /sys/bus/mhi/devices/.../trigger_edl
>>
>Do you remember that I told you I want to merge such function from qualcomm driver
>in last year? I merge the commit from QUD driver in my local. Actually it's same as the
>commit [1], it's called "force_edl". And sure, the result is yes, it works well.
>
Latest test, it doesn't work in Linux V6.9 since there is a patch missing. In my local previous
test, there is no mhi_cntrl->edl_trigger condition to set up dev_attr_trigger_edl.
Seems patch [2] is missed.

[2]-https://lore.kernel.org/mhi/1713928915-18229-4-git-send-email-quic_qianyu@quicinc.com/
>>> >> BTW, I need to check if it works after updating 'edl fw' from  xbl_s_devprg_ns.melf to
>>> >> edl.mbn. 
>>> 
>>> >
>>> >Okay. IMO, we should upstream the product support only after a stable firmware
>>> >release (well stable in the sense a stable name at least).
>>> >
>>> >- Mani
>>> The check result is we can rename it to align with previous format. Until now, 
>>> I didn't see any mhi device has upstream their firmware to /lib/firmware/qcom folder.
>>
>>It is not mandatory, but it is a best practise that I recently started asking
>>for.
>>
>>> If it's a must, I think we can upstream the edl file later.  Anyway, we hope we can
>>> merge this sdx72 support into 6.10 since customer(Dell) would use this kernel for official
>>> release. But no worry, we can make sure this firehose download method works well in
>>>  our local side.
>>> And also, please help a review about my previous email about fix sdx72 ping failure issue.
>>> There is a fix solution from us. 
>>> 
>>
>>Qiang is working on that.
>Good to hear that. BTW, may I know the feature merge window in V6.10? I don't worry about
>merge window of the network fix commit, since it's a fix with higher priority. But I want to
>merge the basic support of my SDX72 before merge window close. This is important for us.
>
>Thanks!
>>
>>- Mani
>>
>>[1] https://lore.kernel.org/mhi/1713928915-18229-1-git-send-email-quic_qianyu@quicinc.com/
>>
>>-- 
>>மணிவண்ணன் சதாசிவம்

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