[Intel-gfx] [PATCH] drm/i915: add another virtual PCH bridge for passthrough support

[Daniel Vetter]

On Wed, Mar 16, 2016 at 09:17:57PM +0000, Kay, Allen M wrote:
> 
> This patch is require for running i915 in a VM in universal passthrough (UPT) mode on some systems.  UPT mode allows IGD to be passed through to a VM without hypervisor quirks.
> 
> Reviewed-by: Allen Kay <allen.m.kay at intel.com>

Queued for -next, thanks for the patch.
-Daniel

> 
> > -----Original Message-----
> > From: Jesse Barnes [mailto:jbarnes at virtuousgeek.org]
> > Sent: Wednesday, March 16, 2016 1:32 PM
> > To: intel-gfx at lists.freedesktop.org
> > Cc: Kay, Allen M <allen.m.kay at intel.com>
> > Subject: [PATCH] drm/i915: add another virtual PCH bridge for passthrough
> > support
> > 
> > Some configs use the P2X type but some use a P3X type PCH, so add that to
> > the detect_pch function so things work correctly.
> > 
> > Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
> > ---
> >  drivers/gpu/drm/i915/i915_drv.c | 1 +
> >  drivers/gpu/drm/i915/i915_drv.h | 1 +
> >  2 files changed, 2 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/i915/i915_drv.c
> > b/drivers/gpu/drm/i915/i915_drv.c index 20e8200..6ad4390 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.c
> > +++ b/drivers/gpu/drm/i915/i915_drv.c
> > @@ -504,6 +504,7 @@ void intel_detect_pch(struct drm_device *dev)
> >  				WARN_ON(!IS_SKYLAKE(dev) &&
> >  					!IS_KABYLAKE(dev));
> >  			} else if ((id == INTEL_PCH_P2X_DEVICE_ID_TYPE) ||
> > +				   (id == INTEL_PCH_P3X_DEVICE_ID_TYPE) ||
> >  				   ((id ==
> > INTEL_PCH_QEMU_DEVICE_ID_TYPE) &&
> >  				    pch->subsystem_vendor == 0x1af4 &&
> >  				    pch->subsystem_device == 0x1100)) { diff -
> > -git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> > index 9e76bfc..e53cd42 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.h
> > +++ b/drivers/gpu/drm/i915/i915_drv.h
> > @@ -2695,6 +2695,7 @@ struct drm_i915_cmd_table {
> >  #define INTEL_PCH_SPT_DEVICE_ID_TYPE		0xA100
> >  #define INTEL_PCH_SPT_LP_DEVICE_ID_TYPE		0x9D00
> >  #define INTEL_PCH_P2X_DEVICE_ID_TYPE		0x7100
> > +#define INTEL_PCH_P3X_DEVICE_ID_TYPE		0x7000
> >  #define INTEL_PCH_QEMU_DEVICE_ID_TYPE		0x2900 /* qemu q35
> > has 2918 */
> > 
> >  #define INTEL_PCH_TYPE(dev) (__I915__(dev)->pch_type)
> > --
> > 1.9.1
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch