diff options
Diffstat (limited to 'drivers/gpu/drm/cirrus/cirrus_main.c')
| -rw-r--r-- | drivers/gpu/drm/cirrus/cirrus_main.c | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/drivers/gpu/drm/cirrus/cirrus_main.c b/drivers/gpu/drm/cirrus/cirrus_main.c index ab7cb547c570..4c2d68e9102d 100644 --- a/drivers/gpu/drm/cirrus/cirrus_main.c +++ b/drivers/gpu/drm/cirrus/cirrus_main.c @@ -49,14 +49,16 @@ cirrus_user_framebuffer_create(struct drm_device *dev, struct drm_file *filp, struct drm_mode_fb_cmd2 *mode_cmd) { + struct cirrus_device *cdev = dev->dev_private; struct drm_gem_object *obj; struct cirrus_framebuffer *cirrus_fb; int ret; u32 bpp, depth; drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp); - /* cirrus can't handle > 24bpp framebuffers at all */ - if (bpp > 24) + + if (!cirrus_check_framebuffer(cdev, mode_cmd->width, mode_cmd->height, + bpp, mode_cmd->pitches[0])) return ERR_PTR(-EINVAL); obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]); @@ -96,8 +98,7 @@ static int cirrus_vram_init(struct cirrus_device *cdev) { /* BAR 0 is VRAM */ cdev->mc.vram_base = pci_resource_start(cdev->dev->pdev, 0); - /* We have 4MB of VRAM */ - cdev->mc.vram_size = 4 * 1024 * 1024; + cdev->mc.vram_size = pci_resource_len(cdev->dev->pdev, 0); if (!request_mem_region(cdev->mc.vram_base, cdev->mc.vram_size, "cirrusdrmfb_vram")) { @@ -312,3 +313,21 @@ out_unlock: return ret; } + +bool cirrus_check_framebuffer(struct cirrus_device *cdev, int width, int height, + int bpp, int pitch) +{ + const int max_pitch = 0x1FF << 3; /* (4096 - 1) & ~111b bytes */ + const int max_size = cdev->mc.vram_size; + + if (bpp > 32) + return false; + + if (pitch > max_pitch) + return false; + + if (pitch * height > max_size) + return false; + + return true; +} |