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From: <Mario.Limonciello@dell.com>
To: <kherbst@redhat.com>
Cc: <airlied@gmail.com>, <linux-kernel@vger.kernel.org>,
	<linux-acpi@vger.kernel.org>, <dri-devel@lists.freedesktop.org>,
	<nouveau@lists.freedesktop.org>, <rafael.j.wysocki@intel.com>,
	<alex.hung@canonical.com>, <bskeggs@redhat.com>,
	<airlied@redhat.com>
Subject: RE: [Nouveau] [PATCH 1/7] Revert "ACPI / OSI: Add OEM _OSI string to enable dGPU direct output"
Date: Thu, 15 Aug 2019 14:19:58 +0000
Message-ID: <3fc22fe8bcaf4304bb07534b61c4de90@AUSX13MPC101.AMER.DELL.COM> (raw)
In-Reply-To: <CACO55tsDA1WpMGtAPqUJpWt0AmPDnv9LuC09g2KB5GXB-VSCew@mail.gmail.com>

> > There are definitely going to be regressions on machines in the field with the
> > in tree drivers by reverting this.  I think we should have an answer for all of
> those
> > before this revert is accepted.
> >
> > Regarding systems with Intel+NVIDIA, we'll have to work with partners to
> collect
> > some information on the impact of reverting this.
> >
> > When this is used on a system with Intel+AMD the ASL configures AMD GPU to
> use
> > "Hybrid Graphics" when on Windows and "Power Express" and "Switchable
> Graphics"
> > when on Linux.
> 
> and what's exactly the difference between those? And what's the actual
> issue here?

DP/HDMI is not detected unless plugged in at bootup.  It's due to missing HPD
events.

> 
> We already have the PRIME offloading in place and if that's not
> enough, we should work on extending it, not adding some ACPI based
> workarounds, because that's exactly how that looks like.
> 
> Also, was this discussed with anybody involved in the drm subsystem?
> 
> >
> > I feel we need a knob and/or DMI detection to affect the changes that the ASL
> > normally performs.
> 
> Why do we have to do that on a firmware level at all?

Folks from AMD Graphics team recommended this approach.  From their perspective
it's not a workaround.  They view this as a different architecture for AMD graphics driver on
Windows and AMD graphics w/ amdgpu driver.  They have different ASL paths used for
each.

  parent reply index

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-14 21:31 [PATCH 0/7] Adding a proper workaround for fixing RTD3 issues with Nouveau Karol Herbst
2019-08-14 21:31 ` [PATCH 1/7] Revert "ACPI / OSI: Add OEM _OSI string to enable dGPU direct output" Karol Herbst
2019-08-14 21:49   ` Alex Hung
2019-08-14 22:47   ` [Nouveau] " Dave Airlie
2019-08-15 13:55     ` Mario.Limonciello
2019-08-15 14:04       ` Karol Herbst
2019-08-15 14:13         ` Alex Deucher
2019-08-15 14:15           ` Karol Herbst
2019-08-15 14:17             ` Alex Deucher
2019-08-15 14:23               ` Mario.Limonciello
2019-08-15 14:35                 ` Karol Herbst
2019-08-15 14:41                 ` Alex Deucher
2019-08-15 14:19         ` Mario.Limonciello [this message]
2019-08-15 14:25           ` Karol Herbst
2019-08-15 14:34             ` Mario.Limonciello
2019-08-15 14:36               ` Karol Herbst
2019-08-15 14:37             ` Alex Deucher
2019-08-15 14:56               ` Takashi Iwai
2019-08-15 16:19                 ` Mario.Limonciello
2019-08-15 17:43                   ` Takashi Iwai
2019-08-15 18:34                   ` Alex Deucher
2019-08-15 14:59               ` Alex Deucher
2019-08-15 14:11     ` Daniel Vetter
2019-08-19  9:52     ` Rafael J. Wysocki
2019-08-14 21:31 ` [PATCH 2/7] Revert "ACPI / OSI: Add OEM _OSI string to enable NVidia HDMI audio" Karol Herbst
2019-08-14 21:31 ` [PATCH 3/7] Revert "ACPI / OSI: Add OEM _OSI strings to disable NVidia RTD3" Karol Herbst
2019-08-14 23:34   ` Alex Hung
2019-08-15  4:44     ` Karol Herbst
2019-08-14 21:31 ` [PATCH 4/7] drm/nouveau/pci: enable pcie link changes for pascal Karol Herbst
2019-08-14 21:31 ` [PATCH 5/7] drm/nouveau/pci: add nvkm_pcie_get_speed Karol Herbst
2019-08-14 21:31 ` [PATCH 6/7] drm/nouveau/pci: save the boot pcie link speed and restore it on fini Karol Herbst
2019-08-14 21:31 ` [PATCH 7/7] drm/nouveau: abort runtime suspend if we hit an error Karol Herbst

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