linux-kernel - Re: [PATCH 2/2 V2] MFD: intel

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Date:   Tue, 9 Mar 2021 18:13:09 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     "David E. Box" <david.e.box@...ux.intel.com>
Cc:     hdegoede@...hat.com, mgross@...ux.intel.com,
        linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH 2/2 V2] MFD: intel_pmt: Add support for DG1

On Tue, 09 Mar 2021, David E. Box wrote:

> On Tue, 2021-03-09 at 16:45 +0000, Lee Jones wrote:
> > On Wed, 24 Feb 2021, David E. Box wrote:
> > 
> > > Adds PMT Telemetry aggregator support for the DG1 graphics PCIe
> > > card. The
> > > device does not have the DVSEC region in its PCI config space so
> > > hard
> > > code the discovery table data in the driver. Also requires a fix
> > > for DG1
> > > in the Telemetry driver for how the ACCESS_TYPE field is used.
> > > 
> > > Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
> > > ---
> > > Based on 5.11-rc1 review-hans branch:
> > > https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans
> > > 
> > > Changes from V1:
> > > 
> > >         - New patch
> > > 
> > >  drivers/mfd/intel_pmt.c                    | 101 +++++++++++++++--
> > > ----
> > >  drivers/platform/x86/intel_pmt_class.c     |  46 ++++++++++
> > >  drivers/platform/x86/intel_pmt_class.h     |   1 +
> > >  drivers/platform/x86/intel_pmt_telemetry.c |  20 ----
> > >  4 files changed, 119 insertions(+), 49 deletions(-)
> > > 
> > > diff --git a/drivers/mfd/intel_pmt.c b/drivers/mfd/intel_pmt.c
> > > index 65da2b17a204..dd7eb614c28e 100644
> > > --- a/drivers/mfd/intel_pmt.c
> > > +++ b/drivers/mfd/intel_pmt.c
> > > @@ -49,10 +49,14 @@ enum pmt_quirks {
> > >  
> > >         /* Use shift instead of mask to read discovery table offset
> > > */
> > >         PMT_QUIRK_TABLE_SHIFT   = BIT(2),
> > > +
> > > +       /* DVSEC not present (provided in driver data) */
> > > +       PMT_QUIRK_NO_DVSEC      = BIT(3),
> > >  };
> > >  
> > >  struct pmt_platform_info {
> > >         unsigned long quirks;
> > > +       struct intel_dvsec_header **capabilities;
> > >  };
> > >  
> > >  static const struct pmt_platform_info tgl_info = {
> > > @@ -60,6 +64,26 @@ static const struct pmt_platform_info tgl_info =
> > > {
> > >                   PMT_QUIRK_TABLE_SHIFT,
> > >  };
> > >  
> > > +/* DG1 Platform with DVSEC quirk*/
> > > +static struct intel_dvsec_header dg1_telemetry = {
> > > +       .length = 0x10,
> > > +       .id = 2,
> > > +       .num_entries = 1,
> > > +       .entry_size = 3,
> > > +       .tbir = 0,
> > > +       .offset = 0x466000,
> > > +};
> > > +
> > > +static struct intel_dvsec_header *dg1_capabilities[] = {
> > > +       &dg1_telemetry,
> > > +       NULL
> > > +};
> > > +
> > > +static const struct pmt_platform_info dg1_info = {
> > > +       .quirks = PMT_QUIRK_NO_DVSEC,
> > > +       .capabilities = dg1_capabilities,
> > > +};
> > > +
> > >  static int pmt_add_dev(struct pci_dev *pdev, struct
> > > intel_dvsec_header *header,
> > >                        unsigned long quirks)
> > >  {
> > > @@ -147,37 +171,54 @@ static int pmt_pci_probe(struct pci_dev
> > > *pdev, const struct pci_device_id *id)
> > >         if (info)
> > >                 quirks = info->quirks;
> > >  
> > > -       do {
> > > -               struct intel_dvsec_header header;
> > > -               u32 table;
> > > -               u16 vid;
> > > +       if (info && (info->quirks & PMT_QUIRK_NO_DVSEC)) {
> > 
> > Nit: Why not use 'quirks' from a few lines above?
> 
> Ack

I've applied this.  Can you fix this as a follow-up please?

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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