drm/nouveau: allow cursor image and position to survive suspend

- This isn't triggered yet on a normal kernel, because it still does a VT
switch, but it seemed like a good idea to fix this now.

Tested-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Maarten Maathuis <madman2003@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

4 files changed, 33 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_crtc.h b/drivers/gpu/drm/nouveau/nouveau_crtc.h
index 49fa7b2d257..cb1ce2a0916 100644
--- a/drivers/gpu/drm/nouveau/nouveau_crtc.h
+++ b/drivers/gpu/drm/nouveau/nouveau_crtc.h
@@ -40,6 +40,8 @@ struct nouveau_crtc {
         int sharpness;
         int last_dpms;
 
+        int cursor_saved_x, cursor_saved_y;
+
         struct {
                 int cpp;
                 bool blanked;
diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.c b/drivers/gpu/drm/nouveau/nouveau_drv.c
index c6079e36669..27377043229 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drv.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drv.c
@@ -175,6 +175,13 @@ nouveau_pci_suspend(struct pci_dev *pdev, pm_message_t pm_state)
                 nouveau_bo_unpin(nouveau_fb->nvbo);
         }
 
+        list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+                struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
+
+                nouveau_bo_unmap(nv_crtc->cursor.nvbo);
+                nouveau_bo_unpin(nv_crtc->cursor.nvbo);
+        }
+
         NV_INFO(dev, "Evicting buffers...\n");
         ttm_bo_evict_mm(&dev_priv->ttm.bdev, TTM_PL_VRAM);
 
@@ -314,12 +321,34 @@ nouveau_pci_resume(struct pci_dev *pdev)
                 nouveau_bo_pin(nouveau_fb->nvbo, TTM_PL_FLAG_VRAM);
         }
 
+        list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+                struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
+                int ret;
+
+                ret = nouveau_bo_pin(nv_crtc->cursor.nvbo, TTM_PL_FLAG_VRAM);
+                if (!ret)
+                        ret = nouveau_bo_map(nv_crtc->cursor.nvbo);
+                if (ret)
+                        NV_ERROR(dev, "Could not pin/map cursor.\n");
+        }
+
         if (dev_priv->card_type < NV_50) {
                 nv04_display_restore(dev);
                 NVLockVgaCrtcs(dev, false);
         } else
                 nv50_display_init(dev);
 
+        list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+                struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
+
+                nv_crtc->cursor.set_offset(nv_crtc,
+                                        nv_crtc->cursor.nvbo->bo.offset -
+                                        dev_priv->vm_vram_base);
+
+                nv_crtc->cursor.set_pos(nv_crtc, nv_crtc->cursor_saved_x,
+                        nv_crtc->cursor_saved_y);
+        }
+
         /* Force CLUT to get re-loaded during modeset */
         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
                 struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
diff --git a/drivers/gpu/drm/nouveau/nv04_cursor.c b/drivers/gpu/drm/nouveau/nv04_cursor.c
index 89a91b9d8b2..aaf3de3bc81 100644
--- a/drivers/gpu/drm/nouveau/nv04_cursor.c
+++ b/drivers/gpu/drm/nouveau/nv04_cursor.c
@@ -20,6 +20,7 @@ nv04_cursor_hide(struct nouveau_crtc *nv_crtc, bool update)
 static void
 nv04_cursor_set_pos(struct nouveau_crtc *nv_crtc, int x, int y)
 {
+        nv_crtc->cursor_saved_x = x; nv_crtc->cursor_saved_y = y;
         NVWriteRAMDAC(nv_crtc->base.dev, nv_crtc->index,
                       NV_PRAMDAC_CU_START_POS,
                       XLATE(y, 0, NV_PRAMDAC_CU_START_POS_Y) |
diff --git a/drivers/gpu/drm/nouveau/nv50_cursor.c b/drivers/gpu/drm/nouveau/nv50_cursor.c
index 753e723adb3..03ad7ab14f0 100644
--- a/drivers/gpu/drm/nouveau/nv50_cursor.c
+++ b/drivers/gpu/drm/nouveau/nv50_cursor.c
@@ -107,6 +107,7 @@ nv50_cursor_set_pos(struct nouveau_crtc *nv_crtc, int x, int y)
 {
         struct drm_device *dev = nv_crtc->base.dev;
 
+        nv_crtc->cursor_saved_x = x; nv_crtc->cursor_saved_y = y;
         nv_wr32(dev, NV50_PDISPLAY_CURSOR_USER_POS(nv_crtc->index),
                 ((y & 0xFFFF) << 16) | (x & 0xFFFF));
         /* Needed to make the cursor move. */