diff options
Diffstat (limited to 'drivers/gpu/drm/drm_mipi_dsi.c')
| -rw-r--r-- | drivers/gpu/drm/drm_mipi_dsi.c | 63 |
1 files changed, 56 insertions, 7 deletions
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index af0d471ee246..1160a579e0dc 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -999,6 +999,27 @@ int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi, EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_on); /** + * mipi_dsi_dcs_set_pixel_format() - sets the pixel format for the RGB image + * data used by the interface + * @dsi: DSI peripheral device + * @format: pixel format + * + * Return: 0 on success or a negative error code on failure. + */ +int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format) +{ + ssize_t err; + + err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_PIXEL_FORMAT, &format, + sizeof(format)); + if (err < 0) + return err; + + return 0; +} +EXPORT_SYMBOL(mipi_dsi_dcs_set_pixel_format); + +/** * mipi_dsi_dcs_set_tear_scanline() - set the scanline to use as trigger for * the Tearing Effect output signal of the display module * @dsi: DSI peripheral device @@ -1021,25 +1042,53 @@ 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_pixel_format() - sets the pixel format for the RGB image - * data used by the interface + * mipi_dsi_dcs_set_display_brightness() - sets the brightness value of the + * display * @dsi: DSI peripheral device - * @format: pixel format + * @brightness: brightness value * * Return: 0 on success or a negative error code on failure. */ -int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format) +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_PIXEL_FORMAT, &format, - sizeof(format)); + 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_pixel_format); +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) { |