drm/radeon/kms: Add MSI quirk for Dell RS690

Some Dell laptops only seem to work with MSIs.  This
looks like a platform/bios bug.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=37679

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c
index f88c1a2..914d9ee 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
@@ -125,6 +125,12 @@ static bool radeon_msi_ok(struct radeon_device *rdev)
            (rdev->pdev->subsystem_device == 0x30c2))
                return true;
 
+       /* Dell RS690 only seems to work with MSIs. */
+       if ((rdev->pdev->device == 0x791f) &&
+           (rdev->pdev->subsystem_vendor == 0x1028) &&
+           (rdev->pdev->subsystem_device == 0x01fd))
+               return true;
+
        if (rdev->flags & RADEON_IS_IGP) {
                /* APUs work fine with MSIs */
                if (rdev->family >= CHIP_PALM)