drm/radeon/kms: resume AGP by calling init.

AGP resume was broken since we moved to the new init path,
because we never re-enabled AGP on these systems at resume time.

This patch just calls the AGP resume call which just does the reinit
at resume time like the old path did.

Since AGP is pretty much gpu independant I did it outside
the gpu specific code.

Signed-off-by: Dave Airlie <airlied@redhat.com>

3 files changed, 15 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 757f5cd3774..224506a2f7b 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -519,6 +519,7 @@ typedef int (*radeon_packet3_check_t)(struct radeon_cs_parser *p,
  * AGP
  */
 int radeon_agp_init(struct radeon_device *rdev);
+void radeon_agp_resume(struct radeon_device *rdev);
 void radeon_agp_fini(struct radeon_device *rdev);
 
 
diff --git a/drivers/gpu/drm/radeon/radeon_agp.c b/drivers/gpu/drm/radeon/radeon_agp.c
index 23ea9955ac5..54bf49a6d67 100644
--- a/drivers/gpu/drm/radeon/radeon_agp.c
+++ b/drivers/gpu/drm/radeon/radeon_agp.c
@@ -237,6 +237,18 @@ int radeon_agp_init(struct radeon_device *rdev)
 #endif
 }
 
+void radeon_agp_resume(struct radeon_device *rdev)
+{
+#if __OS_HAS_AGP
+        int r;
+        if (rdev->flags & RADEON_IS_AGP) {
+                r = radeon_agp_init(rdev);
+                if (r)
+                        dev_warn(rdev->dev, "radeon AGP reinit failed\n");
+        }
+#endif
+}
+
 void radeon_agp_fini(struct radeon_device *rdev)
 {
 #if __OS_HAS_AGP
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index e3f9edfa40f..41bb76fbe73 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -688,6 +688,8 @@ int radeon_resume_kms(struct drm_device *dev)
                 return -1;
         }
         pci_set_master(dev->pdev);
+        /* resume AGP if in use */
+        radeon_agp_resume(rdev);
         radeon_resume(rdev);
         radeon_restore_bios_scratch_regs(rdev);
         fb_set_suspend(rdev->fbdev_info, 0);