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Commit 3d9a8fcf authored by Thierry Reding's avatar Thierry Reding
Browse files

drm/dsi: Implement DCS get_power_mode command 



Provide a small convenience wrapper that transmits a DCS get_power_mode
command. A set of bitmasks for the mode bits is also provided.

Acked-by: default avatarAndrzej Hajda <a.hajda@samsung.com>
Reviewed-by: default avatarSean Paul <seanpaul@chromium.org>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 2f16b897

drivers/gpu/drm/drm_mipi_dsi.c

+25 −0
Original line number Diff line number Diff line
@@ -602,6 +602,31 @@ int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi) 
}

EXPORT_SYMBOL(mipi_dsi_dcs_soft_reset);



/**

 * mipi_dsi_dcs_get_power_mode() - query the display module's current power

 *    mode

 * @dsi: DSI peripheral device

 * @mode: return location for the current power mode

 *

 * Return: 0 on success or a negative error code on failure.

 */

int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode)

{

	ssize_t err;



	err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_POWER_MODE, mode,

				sizeof(*mode));

	if (err <= 0) {

		if (err == 0)

			err = -ENODATA;



		return err;

	}



	return 0;

}

EXPORT_SYMBOL(mipi_dsi_dcs_get_power_mode);



/**

 * mipi_dsi_dcs_enter_sleep_mode() - disable all unnecessary blocks inside the

 *    display module except interface communication

include/drm/drm_mipi_dsi.h

+7 −0
Original line number Diff line number Diff line
@@ -185,6 +185,12 @@ enum mipi_dsi_dcs_tear_mode { 
	MIPI_DSI_DCS_TEAR_MODE_VHBLANK,

};



#define MIPI_DSI_DCS_POWER_MODE_DISPLAY (1 << 2)

#define MIPI_DSI_DCS_POWER_MODE_NORMAL  (1 << 3)

#define MIPI_DSI_DCS_POWER_MODE_SLEEP   (1 << 4)

#define MIPI_DSI_DCS_POWER_MODE_PARTIAL (1 << 5)

#define MIPI_DSI_DCS_POWER_MODE_IDLE    (1 << 6)



ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi,

				  const void *data, size_t len);

ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd,
@@ -193,6 +199,7 @@ ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data, 
			  size_t len);

int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi);

int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi);

int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode);

int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi);

int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi);

int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi);