drm/radeon/kms: add dynamic engine reclocking (V9)

V2: reorganize functions, fix modesetting calls
V3: rebase patch, use radeon's workqueue
V4: enable on tested chipsets only, request VBLANK IRQs
V5: enable PM on older hardware (IRQs, mode_fixup, dpms)
V6: use separate dynpm module parameter
V7: drop RADEON_ prefix, set minimum mode for dpms off
V8: update legacy encoder call, fix order in rs600 IRQ
V9: update compute_clocks call in legacy, not only DPMS_OFF

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c
index c3818562a13e..a581fdead4dd 100644
--- a/drivers/gpu/drm/radeon/rs600.c
+++ b/drivers/gpu/drm/radeon/rs600.c
@@ -406,10 +406,16 @@ int rs600_irq_process(struct radeon_device *rdev)
                 if (G_000044_SW_INT(status))
                         radeon_fence_process(rdev);
                 /* Vertical blank interrupts */
-                if (G_007EDC_LB_D1_VBLANK_INTERRUPT(r500_disp_int))
+                if (G_007EDC_LB_D1_VBLANK_INTERRUPT(r500_disp_int)) {
                         drm_handle_vblank(rdev->ddev, 0);
-                if (G_007EDC_LB_D2_VBLANK_INTERRUPT(r500_disp_int))
+                        if (rdev->pm.vblank_callback)
+                                queue_work(rdev->wq, &rdev->pm.reclock_work);
+                }
+                if (G_007EDC_LB_D2_VBLANK_INTERRUPT(r500_disp_int)) {
                         drm_handle_vblank(rdev->ddev, 1);
+                        if (rdev->pm.vblank_callback)
+                                queue_work(rdev->wq, &rdev->pm.reclock_work);
+                }
                 if (G_007EDC_DC_HOT_PLUG_DETECT1_INTERRUPT(r500_disp_int)) {
                         queue_hotplug = true;
                         DRM_DEBUG("HPD1\n");