linux-kernel - Re: [PATCH v3 4/5] PCI: epf-mhi: Add support for SA8775P

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Message-ID: <20231026061139.GB4915@thinkpad>
Date:   Thu, 26 Oct 2023 11:41:39 +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, 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,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Vinod Koul <vkoul@...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,
        linux-phy@...ts.infradead.org
Subject: Re: [PATCH v3 4/5] PCI: epf-mhi: Add support for SA8775P

On Thu, Oct 26, 2023 at 11:00:29AM +0530, Mrinmay Sarkar wrote:
> 
> On 10/25/2023 1:26 PM, Manivannan Sadhasivam wrote:
> > On Thu, Oct 19, 2023 at 05:07:09PM +0530, Mrinmay Sarkar wrote:
> > > Add support for Qualcomm Snapdragon SA8775P SoC to the EPF driver.
> > > SA8775P has the PID (0x0306) and supports HDMA. Currently, it has
> > Is the PID fixed? I thought you just want to reuse the SDXxx PID in the
> > meantime.
> > 
> > - Mani
> 
> The PID for SA8775p EP is not decided yet. So using 0x0306 PID meantime.
> 

Okay, then please mention that explicitly in the commit message.

- Mani

> --Mrinmay
> 
> > > no fixed PCI class, so it is being advertised as "PCI_CLASS_OTHERS".
> > > 
> > > Signed-off-by: Mrinmay Sarkar <quic_msarkar@...cinc.com>
> > > ---
> > >   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 b7b9d3e..4487260 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,
> > > +	.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 = "sa8775p", .driver_data = (kernel_ulong_t)&sa8775p_info },
> > >   	{ .name = "sdx55", .driver_data = (kernel_ulong_t)&sdx55_info },
> > >   	{ .name = "sm8450", .driver_data = (kernel_ulong_t)&sm8450_info },
> > >   	{},
> > > -- 
> > > 2.7.4
> > > 
> 

-- 
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