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drm/dsi: Implement DCS soft_reset command 

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

Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
hifive-unleashed-5.1
Thierry Reding 2014-08-05 11:15:15 +02:00
parent 083d573fd0
commit 2f16b89737
2 changed files with 19 additions and 0 deletions
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18
drivers/gpu/drm/drm_mipi_dsi.c
View File

@ -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

1
include/drm/drm_mipi_dsi.h
View File

@ -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);