summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/drm_mipi_dsi.c
diff options
context:
space:
mode:
authorThierry Reding <treding@nvidia.com>2014-08-05 11:14:02 +0200
committerThierry Reding <treding@nvidia.com>2014-11-13 13:55:59 +0100
commit083d573fd013c9996d7462d39b894d360311d750 (patch)
tree693f575789c76f202cf2470b052b55aacc50475b /drivers/gpu/drm/drm_mipi_dsi.c
parent009081e0874d28b504ffa1842f6ddfafd2dd36fc (diff)
downloadlinux-083d573fd013c9996d7462d39b894d360311d750.tar.bz2
drm/dsi: Implement DCS nop command
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>
Diffstat (limited to 'drivers/gpu/drm/drm_mipi_dsi.c')
-rw-r--r--drivers/gpu/drm/drm_mipi_dsi.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index 431e96f19288..d953b7fe5013 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -567,6 +567,24 @@ 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
* @dsi: DSI peripheral device