From: Thierry Reding treding@nvidia.com
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: Andrzej Hajda a.hajda@samsung.com Signed-off-by: Thierry Reding treding@nvidia.com --- Changes in v4: - return -ENODATA when no data could be read
drivers/gpu/drm/drm_mipi_dsi.c | 25 +++++++++++++++++++++++++ include/drm/drm_mipi_dsi.h | 7 +++++++ 2 files changed, 32 insertions(+)
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index acfaaa37b905..da34469b9b98 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -528,6 +528,31 @@ 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 * @dsi: DSI peripheral device diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index c72838679136..4cbf8e658a3a 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -182,6 +182,12 @@ 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, @@ -190,6 +196,7 @@ 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);