diff options
| -rw-r--r-- | drivers/video/fbsysfs.c | 82 |
1 files changed, 72 insertions, 10 deletions
diff --git a/drivers/video/fbsysfs.c b/drivers/video/fbsysfs.c index ddc9443254d9..63b505cce4ec 100644 --- a/drivers/video/fbsysfs.c +++ b/drivers/video/fbsysfs.c @@ -242,10 +242,68 @@ static ssize_t show_virtual(struct class_device *class_device, char *buf) fb_info->var.yres_virtual); } -static ssize_t store_cmap(struct class_device *class_device, const char * buf, +/* Format for cmap is "%02x%c%4x%4x%4x\n" */ +/* %02x entry %c transp %4x red %4x blue %4x green \n */ +/* 255 rows at 16 chars equals 4096 */ +/* PAGE_SIZE can be 4096 or larger */ +static ssize_t store_cmap(struct class_device *class_device, const char *buf, size_t count) { -// struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device); + struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device); + int rc, i, start, length, transp = 0; + + if ((count > 4096) || ((count % 16) != 0) || (PAGE_SIZE < 4096)) + return -EINVAL; + + if (!fb_info->fbops->fb_setcolreg && !fb_info->fbops->fb_setcmap) + return -EINVAL; + + sscanf(buf, "%02x", &start); + length = count / 16; + + for (i = 0; i < length; i++) + if (buf[i * 16 + 2] != ' ') + transp = 1; + + /* If we can batch, do it */ + if (fb_info->fbops->fb_setcmap && length > 1) { + struct fb_cmap umap; + + memset(&umap, 0, sizeof(umap)); + if ((rc = fb_alloc_cmap(&umap, length, transp))) + return rc; + + umap.start = start; + for (i = 0; i < length; i++) { + sscanf(&buf[i * 16 + 3], "%4hx", &umap.red[i]); + sscanf(&buf[i * 16 + 7], "%4hx", &umap.blue[i]); + sscanf(&buf[i * 16 + 11], "%4hx", &umap.green[i]); + if (transp) + umap.transp[i] = (buf[i * 16 + 2] != ' '); + } + rc = fb_info->fbops->fb_setcmap(&umap, fb_info); + fb_copy_cmap(&umap, &fb_info->cmap); + fb_dealloc_cmap(&umap); + + return rc; + } + for (i = 0; i < length; i++) { + u16 red, blue, green, tsp; + + sscanf(&buf[i * 16 + 3], "%4hx", &red); + sscanf(&buf[i * 16 + 7], "%4hx", &blue); + sscanf(&buf[i * 16 + 11], "%4hx", &green); + tsp = (buf[i * 16 + 2] != ' '); + if ((rc = fb_info->fbops->fb_setcolreg(start++, + red, green, blue, tsp, fb_info))) + return rc; + + fb_info->cmap.red[i] = red; + fb_info->cmap.blue[i] = blue; + fb_info->cmap.green[i] = green; + if (transp) + fb_info->cmap.transp[i] = tsp; + } return 0; } @@ -253,20 +311,24 @@ static ssize_t show_cmap(struct class_device *class_device, char *buf) { struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device); - unsigned int offset = 0, i; + unsigned int i; if (!fb_info->cmap.red || !fb_info->cmap.blue || - !fb_info->cmap.green || !fb_info->cmap.transp) + !fb_info->cmap.green) + return -EINVAL; + + if (PAGE_SIZE < 4096) return -EINVAL; + /* don't mess with the format, the buffer is PAGE_SIZE */ + /* 255 entries at 16 chars per line equals 4096 = PAGE_SIZE */ for (i = 0; i < fb_info->cmap.len; i++) { - offset += snprintf(buf, PAGE_SIZE - offset, - "%d,%d,%d,%d,%d\n", i + fb_info->cmap.start, - fb_info->cmap.red[i], fb_info->cmap.blue[i], - fb_info->cmap.green[i], - fb_info->cmap.transp[i]); + sprintf(&buf[ i * 16], "%02x%c%4x%4x%4x\n", i + fb_info->cmap.start, + ((fb_info->cmap.transp && fb_info->cmap.transp[i]) ? '*' : ' '), + fb_info->cmap.red[i], fb_info->cmap.blue[i], + fb_info->cmap.green[i]); } - return offset; + return 4096; } static ssize_t store_blank(struct class_device *class_device, const char * buf, |