diff options
Diffstat (limited to 'drivers/gpu/drm/drm_mipi_dsi.c')
| -rw-r--r-- | drivers/gpu/drm/drm_mipi_dsi.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index 8e56228fb1fb..1160a579e0dc 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -1041,6 +1041,55 @@ int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanline) } EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_scanline); +/** + * mipi_dsi_dcs_set_display_brightness() - sets the brightness value of the + * display + * @dsi: DSI peripheral device + * @brightness: brightness value + * + * Return: 0 on success or a negative error code on failure. + */ +int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi, + u16 brightness) +{ + u8 payload[2] = { brightness & 0xff, brightness >> 8 }; + ssize_t err; + + err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, + payload, sizeof(payload)); + if (err < 0) + return err; + + return 0; +} +EXPORT_SYMBOL(mipi_dsi_dcs_set_display_brightness); + +/** + * mipi_dsi_dcs_get_display_brightness() - gets the current brightness value + * of the display + * @dsi: DSI peripheral device + * @brightness: brightness value + * + * Return: 0 on success or a negative error code on failure. + */ +int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi, + u16 *brightness) +{ + ssize_t err; + + err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_DISPLAY_BRIGHTNESS, + brightness, sizeof(*brightness)); + if (err <= 0) { + if (err == 0) + err = -ENODATA; + + return err; + } + + return 0; +} +EXPORT_SYMBOL(mipi_dsi_dcs_get_display_brightness); + static int mipi_dsi_drv_probe(struct device *dev) { struct mipi_dsi_driver *drv = to_mipi_dsi_driver(dev->driver); |