drm/radeon/kms: more fixes to rv770 suspend/resume path.

This resumes my
RV730PRO (4650)
RV770 (4850)
fine.

Still researching the RV4550 (RV710), resumes without X fine.
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/radeon.h

@@ -1070,5 +1070,6 @@ extern void r600_scratch_init(struct radeon_device *rdev);
 extern int r600_blit_init(struct radeon_device *rdev);
 extern void r600_blit_fini(struct radeon_device *rdev);
 extern int r600_cp_init_microcode(struct radeon_device *rdev);
+extern int r600_gpu_reset(struct radeon_device *rdev);
 
 #endif

drivers/gpu/drm/radeon/rv770.c

@@ -56,8 +56,6 @@ int rv770_pcie_gart_enable(struct radeon_device *rdev)
 	r = radeon_gart_table_vram_pin(rdev);
 	if (r)
 		return r;
-	for (i = 0; i < rdev->gart.num_gpu_pages; i++)
-		r600_gart_clear_page(rdev, i);
 	/* Setup L2 cache */
 	WREG32(VM_L2_CNTL, ENABLE_L2_CACHE | ENABLE_L2_FRAGMENT_PROCESSING |
 				ENABLE_L2_PTE_CACHE_LRU_UPDATE_BY_WRITE |
@@ -848,14 +846,15 @@ int rv770_mc_init(struct radeon_device *rdev)
 }
 int rv770_gpu_reset(struct radeon_device *rdev)
 {
-	/* FIXME: implement */
-	return 0;
+	/* FIXME: implement any rv770 specific bits */
+	return r600_gpu_reset(rdev);
 }
 
 static int rv770_startup(struct radeon_device *rdev)
 {
 	int r;
 
+	radeon_gpu_reset(rdev);
 	rv770_mc_resume(rdev);
 	r = rv770_pcie_gart_enable(rdev);
 	if (r)
@@ -1039,6 +1038,8 @@ int rv770_init(struct radeon_device *rdev)
 
 void rv770_fini(struct radeon_device *rdev)
 {
+	rv770_suspend(rdev);
+
 	r600_blit_fini(rdev);
 	radeon_ring_fini(rdev);
 	rv770_pcie_gart_fini(rdev);