drm/radeon/kms: add support for msi

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / gpu / drm / radeon / rs600.c

diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c
index 10dfa78762da22cbac4bd95ba366ae6644417e18..942754c39be9639ec1218d17d9e1b4e55ac006fe 100644 (file)
--- a/drivers/gpu/drm/radeon/rs600.c
+++ b/drivers/gpu/drm/radeon/rs600.c
@@ -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;
 }