From: Thierry Reding treding@nvidia.com
Provide a small convenience wrapper that transmits a DCS soft_reset command.
Signed-off-by: Thierry Reding treding@nvidia.com --- drivers/gpu/drm/drm_mipi_dsi.c | 18 ++++++++++++++++++ include/drm/drm_mipi_dsi.h | 1 + 2 files changed, 19 insertions(+)
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index c88dcda2f4ac..60bd68b520ae 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -535,6 +535,24 @@ 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 * @dsi: DSI peripheral device diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index be16c8e769bd..2afbd5853f78 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -171,6 +171,7 @@ 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);