Change-Id: I073cf5b91554a293009a121845ac1bf3b6b3e6ce
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
Signed-off-by: John Keeping <john@metanate.com>
(cherry picked from commit
c9ad1d9946e849ac3d8821d91e136d7fd728dec5)
crtc_funcs->wait_for_update(crtc);
}
crtc_funcs->wait_for_update(crtc);
}
+/*
+ * We can't use drm_atomic_helper_wait_for_vblanks() because rk3288 and rk3066
+ * have hardware counters for neither vblanks nor scanlines, which results in
+ * a race where:
+ * | <-- HW vsync irq and reg take effect
+ * plane_commit --> |
+ * get_vblank and wait --> |
+ * | <-- handle_vblank, vblank->count + 1
+ * cleanup_fb --> |
+ * iommu crash --> |
+ * | <-- HW vsync irq and reg take effect
+ *
+ * This function is equivalent but uses rockchip_crtc_wait_for_update() instead
+ * of waiting for vblank_count to change.
+ */
static void
rockchip_atomic_wait_for_complete(struct drm_device *dev, struct drm_atomic_state *old_state)
{
static void
rockchip_atomic_wait_for_complete(struct drm_device *dev, struct drm_atomic_state *old_state)
{