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Commit 1a9d7593 authored by Vinay Simha BN's avatar Vinay Simha BN Committed by Thierry Reding
Browse files

drm/dsi: Implement DCS set/get display brightness 



Provide a small convenience wrapper that set/get the display brightness.

Cc: John Stultz <john.stultz@linaro.org>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Archit Taneja <archit.taneja@gmail.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: default avatarVinay Simha BN <simhavcs@gmail.com>
Reviewed-by: default avatarEmil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent bbdcf516

drivers/gpu/drm/drm_mipi_dsi.c

+49 −0
Original line number Diff line number Diff line
@@ -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);

include/drm/drm_mipi_dsi.h

+4 −0
Original line number Diff line number Diff line
@@ -270,6 +270,10 @@ int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi, 
			     enum mipi_dsi_dcs_tear_mode mode);

int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format);

int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanline);

int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi,

					u16 brightness);

int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi,

					u16 *brightness);



/**

 * struct mipi_dsi_driver - DSI driver