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authorAlex Deucher <alexander.deucher@amd.com>2011-11-01 14:20:30 -0400
committerDave Airlie <airlied@redhat.com>2011-11-03 17:53:14 +0000
commita18cee15ed4c8b6a35f96b7b26a46bac32e04bd9 (patch)
tree6f8a83f0b43505b4236ca51ae4fb5aa832a9d644 /drivers/gpu/drm/radeon/radeon_irq_kms.c
parent01e718ec194e30b3e8eb3858c742c13649757efc (diff)
drm/radeon/kms: add MSI module parameter
Allow the user to override whether MSIs are enabled or not on supported ASICs. MSIs are disabled by default on IGP chips as they tend not to work. However certain IGP chips only seem to work with MSIs enabled. I suspect this is a chipset or bios issue, but I'm not sure what the proper fix is. This will at least make diagnosing and working around the problem much easier. See: 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>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_irq_kms.c')
-rw-r--r--drivers/gpu/drm/radeon/radeon_irq_kms.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c
index 914d9ee8fd3..8f86aeb2669 100644
--- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
@@ -118,6 +118,12 @@ static bool radeon_msi_ok(struct radeon_device *rdev)
if (rdev->flags & RADEON_IS_AGP)
return false;
+ /* force MSI on */
+ if (radeon_msi == 1)
+ return true;
+ else if (radeon_msi == 0)
+ return false;
+
/* Quirks */
/* HP RS690 only seems to work with MSIs. */
if ((rdev->pdev->device == 0x791f) &&