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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: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
hifive-unleashed-5.1
Thierry Reding 2014-08-05 11:17:06 +02:00
parent 2f16b89737
commit 3d9a8fcf1c
2 changed files with 32 additions and 0 deletions
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25
drivers/gpu/drm/drm_mipi_dsi.c
View File

@ -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

7
include/drm/drm_mipi_dsi.h
View File

@ -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);