diff options
Diffstat (limited to 'minui/graphics_fbdev.cpp')
| -rw-r--r-- | minui/graphics_fbdev.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/minui/graphics_fbdev.cpp b/minui/graphics_fbdev.cpp index 997e9cac2..512a7d0e7 100644 --- a/minui/graphics_fbdev.cpp +++ b/minui/graphics_fbdev.cpp @@ -59,11 +59,25 @@ minui_backend* open_fbdev() { static void fbdev_blank(minui_backend* backend __unused, bool blank) { +#if defined(TW_NO_SCREEN_BLANK) && defined(TW_BRIGHTNESS_PATH) && defined(TW_MAX_BRIGHTNESS) + int fd; + char brightness[4]; + snprintf(brightness, 4, "%03d", TW_MAX_BRIGHTNESS/2); + + fd = open(TW_BRIGHTNESS_PATH, O_RDWR); + if (fd < 0) { + perror("cannot open LCD backlight"); + return; + } + write(fd, blank ? "000" : brightness, 3); + close(fd); +#else int ret; ret = ioctl(fb_fd, FBIOBLANK, blank ? FB_BLANK_POWERDOWN : FB_BLANK_UNBLANK); if (ret < 0) perror("ioctl(): blank"); +#endif } static void set_displayed_framebuffer(unsigned n) |