drm/radeon/kms: r600/r700 disable irq at suspend

To avoid hw doing anythings after we disabled PCIE GART, fully
disable IRQ at suspend. Also cleanup a bit the ih structure
and process function.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 14 insertions, 16 deletions

diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index b3713f61964c..a6a23a9f9a5c 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -1954,6 +1954,7 @@ int r600_suspend(struct radeon_device *rdev)
         /* FIXME: we should wait for ring to be empty */
         r600_cp_stop(rdev);
         rdev->cp.ready = false;
+        r600_irq_suspend(rdev);
         r600_wb_disable(rdev);
         r600_pcie_gart_disable(rdev);
         /* unpin shaders bo */
@@ -2200,14 +2201,14 @@ void r600_ih_ring_init(struct radeon_device *rdev, unsigned ring_size)
         rb_bufsz = drm_order(ring_size / 4);
         ring_size = (1 << rb_bufsz) * 4;
         rdev->ih.ring_size = ring_size;
-        rdev->ih.align_mask = 4 - 1;
+        rdev->ih.ptr_mask = rdev->ih.ring_size - 1;
+        rdev->ih.rptr = 0;
 }
 
-static int r600_ih_ring_alloc(struct radeon_device *rdev, unsigned ring_size)
+static int r600_ih_ring_alloc(struct radeon_device *rdev)
 {
         int r;
 
-        rdev->ih.ring_size = ring_size;
         /* Allocate ring buffer */
         if (rdev->ih.ring_obj == NULL) {
                 r = radeon_bo_create(rdev, NULL, rdev->ih.ring_size,
@@ -2237,9 +2238,6 @@ static int r600_ih_ring_alloc(struct radeon_device *rdev, unsigned ring_size)
                         return r;
                 }
         }
-        rdev->ih.ptr_mask = (rdev->cp.ring_size / 4) - 1;
-        rdev->ih.rptr = 0;
-
         return 0;
 }
 
@@ -2389,7 +2387,7 @@ int r600_irq_init(struct radeon_device *rdev)
         u32 interrupt_cntl, ih_cntl, ih_rb_cntl;
 
         /* allocate ring */
-        ret = r600_ih_ring_alloc(rdev, rdev->ih.ring_size);
+        ret = r600_ih_ring_alloc(rdev);
         if (ret)
                 return ret;
 
@@ -2452,10 +2450,15 @@ int r600_irq_init(struct radeon_device *rdev)
         return ret;
 }
 
-void r600_irq_fini(struct radeon_device *rdev)
+void r600_irq_suspend(struct radeon_device *rdev)
 {
         r600_disable_interrupts(rdev);
         r600_rlc_stop(rdev);
+}
+
+void r600_irq_fini(struct radeon_device *rdev)
+{
+        r600_irq_suspend(rdev);
         r600_ih_ring_fini(rdev);
 }
 
@@ -2648,9 +2651,7 @@ static inline u32 r600_get_ih_wptr(struct radeon_device *rdev)
                 tmp |= IH_WPTR_OVERFLOW_CLEAR;
                 WREG32(IH_RB_CNTL, tmp);
         }
-        wptr = wptr & WPTR_OFFSET_MASK;
-
-        return wptr;
+        return (wptr & rdev->ih.ptr_mask);
 }
 
 /*        r600 IV Ring
@@ -2686,7 +2687,6 @@ int r600_irq_process(struct radeon_device *rdev)
         u32 wptr = r600_get_ih_wptr(rdev);
         u32 rptr = rdev->ih.rptr;
         u32 src_id, src_data;
-        u32 last_entry = rdev->ih.ring_size - 16;
         u32 ring_index, disp_int, disp_int_cont, disp_int_cont2;
         unsigned long flags;
         bool queue_hotplug = false;
@@ -2820,10 +2820,8 @@ restart_ih:
                 }
 
                 /* wptr/rptr are in bytes! */
-                if (rptr == last_entry)
-                        rptr = 0;
-                else
-                        rptr += 16;
+                rptr += 16;
+                rptr &= rdev->ih.ptr_mask;
         }
         /* make sure wptr hasn't changed while processing */
         wptr = r600_get_ih_wptr(rdev);