diff options
Diffstat (limited to 'drivers/video/fbcmap.c')
| -rw-r--r-- | drivers/video/fbcmap.c | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/drivers/video/fbcmap.c b/drivers/video/fbcmap.c index c51f8fb5c1de..4e5ce8f7d65e 100644 --- a/drivers/video/fbcmap.c +++ b/drivers/video/fbcmap.c @@ -222,8 +222,11 @@ int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *info) transp = cmap->transp; start = cmap->start; - if (start < 0 || !info->fbops->fb_setcolreg) + if (start < 0 || (!info->fbops->fb_setcolreg && + !info->fbops->fb_setcmap)) return -EINVAL; + if (info->fbops->fb_setcmap) + return info->fbops->fb_setcmap(cmap, info); for (i = 0; i < cmap->len; i++) { hred = *red++; hgreen = *green++; @@ -250,8 +253,33 @@ int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *info) transp = cmap->transp; start = cmap->start; - if (start < 0 || !info->fbops->fb_setcolreg) + if (start < 0 || (!info->fbops->fb_setcolreg && + !info->fbops->fb_setcmap)) return -EINVAL; + + /* If we can batch, do it */ + if (info->fbops->fb_setcmap && cmap->len > 1) { + struct fb_cmap umap; + int size = cmap->len * sizeof(u16); + int rc; + + memset(&umap, 0, sizeof(struct fb_cmap)); + rc = fb_alloc_cmap(&umap, cmap->len, transp != NULL); + if (rc) + return rc; + if (copy_from_user(umap.red, red, size) || + copy_from_user(umap.green, green, size) || + copy_from_user(umap.blue, blue, size) || + (transp && copy_from_user(umap.transp, transp, size))) { + rc = -EFAULT; + } + umap.start = start; + if (rc == 0) + rc = info->fbops->fb_setcmap(&umap, info); + fb_dealloc_cmap(&umap); + return rc; + } + for (i = 0; i < cmap->len; i++, red++, blue++, green++) { if (get_user(hred, red) || get_user(hgreen, green) || |