@@ -216,17 +216,20 @@ static void mgag200_move_cursor(struct mga_device *mdev, int x, int y)
int mgag200_cursor_init(struct mga_device *mdev)
{
struct drm_device *dev = mdev->dev;
+ size_t size;
+
+ size = roundup(64 * 48, PAGE_SIZE);
+ if (size * 2 > mdev->vram_fb_available)
+ return -ENOMEM;
/*
* Make small buffers to store a hardware cursor (double
* buffered icon updates)
*/
mdev->cursor.pixels_1 = drm_gem_vram_create(dev, &dev->vram_mm->bdev,
- roundup(48*64, PAGE_SIZE),
- 0, 0);
+ size, 0, 0);
mdev->cursor.pixels_2 = drm_gem_vram_create(dev, &dev->vram_mm->bdev,
- roundup(48*64, PAGE_SIZE),
- 0, 0);
+ size, 0, 0);
if (IS_ERR(mdev->cursor.pixels_2) || IS_ERR(mdev->cursor.pixels_1)) {
mdev->cursor.pixels_1 = NULL;
mdev->cursor.pixels_2 = NULL;
@@ -235,6 +238,14 @@ int mgag200_cursor_init(struct mga_device *mdev)
}
mdev->cursor.pixels_current = NULL;
+ /*
+ * At the high end of video memory, we reserve space for
+ * buffer objects. The cursor plane uses this memory to store
+ * a double-buffered image of the current cursor. Hence, it's
+ * not available for framebuffers.
+ */
+ mdev->vram_fb_available -= 2 * size;
+
return 0;
}
@@ -173,6 +173,8 @@ struct mga_device {
struct mga_cursor cursor;
+ size_t vram_fb_available;
+
bool suspended;
int num_crtc;
enum mga_type type;
@@ -159,7 +159,7 @@ int mgag200_driver_load(struct drm_device *dev, unsigned long flags)
drm_mode_config_init(dev);
dev->mode_config.funcs = (void *)&mga_mode_funcs;
- if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024))
+ if (IS_G200_SE(mdev) && mdev->vram_fb_available < (2048*1024))
dev->mode_config.preferred_depth = 16;
else
dev->mode_config.preferred_depth = 32;
@@ -1629,7 +1629,7 @@ static enum drm_mode_status mga_vga_mode_valid(struct drm_connector *connector,
bpp = connector->cmdline_mode.bpp;
}
- if ((mode->hdisplay * mode->vdisplay * (bpp/8)) > mdev->mc.vram_size) {
+ if ((mode->hdisplay * mode->vdisplay * (bpp/8)) > mdev->vram_fb_available) {
if (connector->cmdline_mode.specified)
connector->cmdline_mode.specified = false;
return MODE_BAD;
@@ -50,6 +50,8 @@ int mgag200_mm_init(struct mga_device *mdev)
mdev->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
pci_resource_len(dev->pdev, 0));
+ mdev->vram_fb_available = mdev->mc.vram_size;
+
return 0;
}
@@ -57,6 +59,8 @@ void mgag200_mm_fini(struct mga_device *mdev)
{
struct drm_device *dev = mdev->dev;
+ mdev->vram_fb_available = 0;
+
drm_vram_helper_release_mm(dev);
arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
The double-buffered cursor image is currently stored in video memory by creating two BOs and pinning them to VRAM. The exact location is chosen by VRAM helpers. The pinned cursor BOs can conflict with framebuffer BOs and prevent the primary plane from displaying its framebuffer. As a first step to solving this problem, we reserve dedicated space at the high end of the video memory for the cursor images. As the amount of video memory now differs from the amount of available framebuffer memory, size tests are adapted accordingly. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> --- drivers/gpu/drm/mgag200/mgag200_cursor.c | 19 +++++++++++++++---- drivers/gpu/drm/mgag200/mgag200_drv.h | 2 ++ drivers/gpu/drm/mgag200/mgag200_main.c | 2 +- drivers/gpu/drm/mgag200/mgag200_mode.c | 2 +- drivers/gpu/drm/mgag200/mgag200_ttm.c | 4 ++++ 5 files changed, 23 insertions(+), 6 deletions(-)