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Commit 2f16b897 authored by Thierry Reding's avatar Thierry Reding
Browse files

drm/dsi: Implement DCS soft_reset command 



Provide a small convenience wrapper that transmits a DCS soft_reset
command.

Reviewed-by: default avatarSean Paul <seanpaul@chromium.org>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 083d573f

drivers/gpu/drm/drm_mipi_dsi.c

+18 −0
Original line number Diff line number Diff line
@@ -584,6 +584,24 @@ int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi) 
}

EXPORT_SYMBOL(mipi_dsi_dcs_nop);



/**

 * mipi_dsi_dcs_soft_reset() - perform a software reset of the display module

 * @dsi: DSI peripheral device

 *

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

 */

int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi)

{

	ssize_t err;



	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SOFT_RESET, NULL, 0);

	if (err < 0)

		return err;



	return 0;

}

EXPORT_SYMBOL(mipi_dsi_dcs_soft_reset);



/**

 * mipi_dsi_dcs_enter_sleep_mode() - disable all unnecessary blocks inside the

 *    display module except interface communication

include/drm/drm_mipi_dsi.h

+1 −0
Original line number Diff line number Diff line
@@ -192,6 +192,7 @@ ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd, 
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_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);