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drm/dsi: Implement DCS nop command

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

Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2014-08-05 11:14:02 +02:00
parent 009081e087
commit 083d573fd0
2 changed files with 19 additions and 0 deletions
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18
drivers/gpu/drm/drm_mipi_dsi.c
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@ -566,6 +566,24 @@ ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data,
}
EXPORT_SYMBOL(mipi_dsi_dcs_read);
/**
* mipi_dsi_dcs_nop() - send DCS nop packet
* @dsi: DSI peripheral device
*
* Return: 0 on success or a negative error code on failure.
*/
int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi)
{
ssize_t err;
err = mipi_dsi_dcs_write(dsi, MIPI_DCS_NOP, NULL, 0);
if (err < 0)
return err;
return 0;
}
EXPORT_SYMBOL(mipi_dsi_dcs_nop);
/**
* mipi_dsi_dcs_enter_sleep_mode() - disable all unnecessary blocks inside the
* display module except interface communication

1
include/drm/drm_mipi_dsi.h
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@ -191,6 +191,7 @@ ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd,
const void *data, size_t len);
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_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);