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drm/radeon/kms: add support for msi

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Try to enable msi on chips that support it.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher
2009-10-16 12:21:24 -04:00
committed by Dave Airlie
parent ebbe1cb936
commit 3e5cb98dfe
5 changed files with 49 additions and 2 deletions
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18
drivers/gpu/drm/radeon/rs600.c
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@@ -242,7 +242,7 @@ void rs600_irq_disable(struct radeon_device *rdev)
int rs600_irq_process(struct radeon_device *rdev)
{
uint32_t status;
uint32_t status, msi_rearm;
uint32_t r500_disp_int;
status = rs600_irq_ack(rdev, &r500_disp_int);
@@ -260,6 +260,22 @@ int rs600_irq_process(struct radeon_device *rdev)
drm_handle_vblank(rdev->ddev, 1);
status = rs600_irq_ack(rdev, &r500_disp_int);
}
if (rdev->msi_enabled) {
switch (rdev->family) {
case CHIP_RS600:
case CHIP_RS690:
case CHIP_RS740:
msi_rearm = RREG32(RADEON_BUS_CNTL) & ~RS600_MSI_REARM;
WREG32(RADEON_BUS_CNTL, msi_rearm);
WREG32(RADEON_BUS_CNTL, msi_rearm | RS600_MSI_REARM);
break;
default:
msi_rearm = RREG32(RADEON_MSI_REARM_EN) & ~RV370_MSI_REARM_EN;
WREG32(RADEON_MSI_REARM_EN, msi_rearm);
WREG32(RADEON_MSI_REARM_EN, msi_rearm | RV370_MSI_REARM_EN);
break;
}
}
return IRQ_HANDLED;
}