[PATCH 4/4] drm/radeon: unpin cursor BOs before suspend

[Grigori Goronzy]

Everything is evicted from VRAM before suspend, so we need to make
sure all BOs are unpinned and re-pinned after resume. Fixes broken
mouse cursor after resume introduced by commit b9729b17.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=100541
Cc: stable at vger.kernel.org
Signed-off-by: Grigori Goronzy <greg at chown.ath.cx>
---
 drivers/gpu/drm/radeon/radeon_device.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 14deeae..dddd5df 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -1578,6 +1578,20 @@ int radeon_suspend_kms(struct drm_device *dev, bool suspend, bool fbcon)
 		drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
 	}
 
+	/* unpin cursors */
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
+
+		if (radeon_crtc->cursor_bo) {
+			struct radeon_bo *robj = gem_to_radeon_bo(radeon_crtc->cursor_bo);
+			r = radeon_bo_reserve(robj, false);
+			if (r == 0) {
+				radeon_bo_unpin(robj);
+				radeon_bo_unreserve(robj);
+			}
+		}
+	}
+
 	/* unpin the front buffers */
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		struct radeon_framebuffer *rfb = to_radeon_framebuffer(crtc->primary->fb);
-- 
1.9.1