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

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Message-ID: <20240515115239.GD4488@thinkpad>
Date: Wed, 15 May 2024 13:52:39 +0200
From: Manivannan Sadhasivam <mani@...nel.org>
To: Slark Xiao <slark_xiao@....com>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.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: [PATCH] bus: mhi: host: Add Foxconn SDX72 related support

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?

> 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

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