linux-kernel - Re: [PATCH v8 4/5] PCI: epf-mhi: Add support for SA8775P

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Message-ID: <20231201055359.GI4009@thinkpad>
Date:   Fri, 1 Dec 2023 11:23:59 +0530
From:   Manivannan Sadhasivam <mani@...nel.org>
To:     Mrinmay Sarkar <quic_msarkar@...cinc.com>
Cc:     agross@...nel.org, andersson@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        konrad.dybcio@...aro.org, robh+dt@...nel.org,
        quic_shazhuss@...cinc.com, quic_nitegupt@...cinc.com,
        quic_ramkri@...cinc.com, quic_nayiluri@...cinc.com,
        dmitry.baryshkov@...aro.org, robh@...nel.org,
        quic_krichai@...cinc.com, quic_vbadigan@...cinc.com,
        quic_parass@...cinc.com, quic_schintav@...cinc.com,
        quic_shijjose@...cinc.com, Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        mhi@...ts.linux.dev
Subject: Re: [PATCH v8 4/5] PCI: epf-mhi: Add support for SA8775P

On Sat, Nov 11, 2023 at 08:03:00AM +0530, Mrinmay Sarkar wrote:
> Add support for Qualcomm Snapdragon SA8775P SoC to the EPF driver.
> SA8775P is currently reusing the PID 0x0306 (the default one hardcoded
> in the config space header) as the unique PID is not yet allocated.
> But the host side stack works fine with the default PID. It will get
> updated once the PID is finalized. Currently, it has no fixed PCI class,
> so it is being advertised as "PCI_CLASS_OTHERS".
> 
> Signed-off-by: Mrinmay Sarkar <quic_msarkar@...cinc.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

- Mani

> ---
>  drivers/pci/endpoint/functions/pci-epf-mhi.c | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 
> diff --git a/drivers/pci/endpoint/functions/pci-epf-mhi.c b/drivers/pci/endpoint/functions/pci-epf-mhi.c
> index 5b0515a..68801c2 100644
> --- a/drivers/pci/endpoint/functions/pci-epf-mhi.c
> +++ b/drivers/pci/endpoint/functions/pci-epf-mhi.c
> @@ -114,6 +114,22 @@ static const struct pci_epf_mhi_ep_info sm8450_info = {
>  	.flags = MHI_EPF_USE_DMA,
>  };
>  
> +static struct pci_epf_header sa8775p_header = {
> +	.vendorid = PCI_VENDOR_ID_QCOM,
> +	.deviceid = 0x0306,               /* FIXME: Update deviceid for sa8775p EP */
> +	.baseclass_code = PCI_CLASS_OTHERS,
> +	.interrupt_pin = PCI_INTERRUPT_INTA,
> +};
> +
> +static const struct pci_epf_mhi_ep_info sa8775p_info = {
> +	.config = &mhi_v1_config,
> +	.epf_header = &sa8775p_header,
> +	.bar_num = BAR_0,
> +	.epf_flags = PCI_BASE_ADDRESS_MEM_TYPE_32,
> +	.msi_count = 32,
> +	.mru = 0x8000,
> +};
> +
>  struct pci_epf_mhi {
>  	const struct pci_epc_features *epc_features;
>  	const struct pci_epf_mhi_ep_info *info;
> @@ -677,6 +693,7 @@ static int pci_epf_mhi_probe(struct pci_epf *epf,
>  }
>  
>  static const struct pci_epf_device_id pci_epf_mhi_ids[] = {
> +	{ .name = "pci_epf_mhi_sa8775p", .driver_data = (kernel_ulong_t)&sa8775p_info },
>  	{ .name = "pci_epf_mhi_sdx55", .driver_data = (kernel_ulong_t)&sdx55_info },
>  	{ .name = "pci_epf_mhi_sm8450", .driver_data = (kernel_ulong_t)&sm8450_info },
>  	{},
> -- 
> 2.7.4
> 

-- 
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