[PATCH 1/2] drm: replace incorrect Compliance/Margin magic numbers with PCI_EXP_LNKCTL2 definitions

[Bjorn Helgaas]

On Tue, Nov 12, 2019 at 05:45:15PM +0100, Michel Dänzer wrote:
> On 2019-11-11 8:29 p.m., Bjorn Helgaas wrote:
> > From: Bjorn Helgaas <bhelgaas at google.com>
> > 
> > Add definitions for these PCIe Link Control 2 register fields:
> > 
> >   Enter Compliance
> >   Transmit Margin
> > 
> > and use them in amdgpu and radeon.
> > 
> > NOTE: This is a functional change because "7 << 9" was apparently a typo.
> > That mask included the high order bit of Transmit Margin, the Enter
> > Modified Compliance bit, and the Compliance SOS bit, but I think what
> > was intended was the 3-bit Transmit Margin field at bits 9:7.
> 
> Can you split out the functional change into a separate patch 1? That
> could make things easier for anyone who bisects the functional change
> for whatever reason.

Great idea, thanks!  Wish I'd thought of that.

While fixing that, I also noticed I missed one case in
amdgpu/si.c.  I'll post a v3.