drm/radeon/kms: add support for msi
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>
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index ed5e983..b438b52 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -186,7 +186,7 @@
int r100_irq_process(struct radeon_device *rdev)
{
- uint32_t status;
+ uint32_t status, msi_rearm;
status = r100_irq_ack(rdev);
if (!status) {
@@ -209,6 +209,21 @@
}
status = r100_irq_ack(rdev);
}
+ if (rdev->msi_enabled) {
+ switch (rdev->family) {
+ case CHIP_RS400:
+ case CHIP_RS480:
+ msi_rearm = RREG32(RADEON_AIC_CNTL) & ~RS400_MSI_REARM;
+ WREG32(RADEON_AIC_CNTL, msi_rearm);
+ WREG32(RADEON_AIC_CNTL, msi_rearm | RS400_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;
}