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    SubjectRe: [Regression, post-rc2] Commit a5ee4eb7541 breaks OpenGL on RS780 (was: Re: Linux 2.6.34-rc3)
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    On Thu, Apr 1, 2010 at 4:48 PM, Rafael J. Wysocki <rjw@sisk.pl> wrote:
    > On Thursday 01 April 2010, Alex Deucher wrote:
    >> On Thu, Apr 1, 2010 at 4:28 PM, Rafael J. Wysocki <rjw@sisk.pl> wrote:
    >> > On Thursday 01 April 2010, Alex Deucher wrote:
    >> >> On Thu, Apr 1, 2010 at 2:36 AM, Clemens Ladisch <clemens@ladisch.de> wrote:
    >> >> > Alex Deucher wrote:
    >> >> >> On Wed, Mar 31, 2010 at 9:13 PM, Rafael J. Wysocki <rjw@sisk.pl> wrote:
    >> >> >>> On Tuesday 30 March 2010, Rafael J. Wysocki wrote:
    >> >> >>>> >       PCI quirk: RS780/RS880: work around missing MSI initialization
    >> >> >>>>
    >> >> >>>> This one (commit a5ee4eb7541) broke OpenGL acceleration on my new test box
    >> >> >>>> which happens to have a RS780.
    >> >> >
    >> >> > So it's better to disable MSI unconditionally.
    >> >> >
    >> >> > Rafael, can you check if MSI works for the HDMI audio device?
    >> >> > (I'd guess it doesn't.)
    >> >> >
    >> >> >> I also have the attached patch queued in via Dave's tree to disable
    >> >> >> MSI on all IGP chips for the time being.
    >> >> >
    >> >> > This disables MSI only for the graphics device.  I'd prefer to have
    >> >> > the quirk on its bridge so that MSI gets disabled for the HDMI audio
    >> >> > device too, to avoid having to duplicate this quirk in the snd-hda-intel
    >> >> > driver.
    >> >> >
    >> >> > ==========
    >> >> >
    >> >> > PCI quirk: RS780/RS880: disable MSI completely
    >> >> >
    >> >> > The missing initialization of the nb_cntl.strap_msi_enable does not seem
    >> >> > to be the only problem that prevents MSI, so that quirk is not
    >> >> > sufficient to enable MSI on all machines.  To be safe, unconditionally
    >> >> > disable MSI for the internal graphics and HDMI audio on these chipsets.
    >> >> >
    >> >> > Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
    >> >>
    >> >> Works fine here.
    >> >>
    >> >> Tested-by: Alex Deucher <alexdeucher@gmail.com>
    >> >
    >> > Unfortunately it doesn't work for me without the
    >> >
    >> > if ((rdev->family >= CHIP_RV380) &&
    >> >            (!(rdev->flags & RADEON_IS_IGP)))
    >> >
    >> > radeon quirk.
    >>
    >> what are your pci ids?
    >
    > 1022:960b
    >
    > I guess 1022 is AMD.
    >
    > OK, I'll try to add that.

    0x960b won't affect the internal gfx. That bridge is for the pcie x16 gfx slot.

    0x9600 Host bridge
    0x9602 Internal GFX PCI-PCI bridge ID
    0x9603 External GFX - port 0
    0x960B External GFX - port 1
    0x9604 PCI-PCI bridge - Port 0
    0x9605 PCI-PCI bridge - Port 1
    0x9606 PCI-PCI bridge - Port 2
    0x9607 PCI-PCI bridge - Port 3
    0x9608 PCI-PCI bridge - Port 4
    0x9609 PCI-PCI bridge - Port 5
    0x960A PCI-PCI bridge (SB)
    0x960F HD Audio controller
    0x791A HDMI Audio codec

    Alex

    >
    > Rafael
    >
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