drm/dsi: Make set_tear_scanline command consistent

Use a consistent name for the function that implements set_tear_scanline
and reword and reformat the kerneldoc slightly.
Signed-off-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20160613133327.7630-1-thierry.reding@gmail.com

drivers/gpu/drm/drm_mipi_dsi.c

@@ -999,17 +999,17 @@ int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,
 EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_on);
 
 /**
- * mipi_dsi_set_tear_scanline() - turn on the display module's Tearing Effect
- * output signal on the TE signal line when display module reaches line N
- * defined by STS[n:0].
+ * mipi_dsi_dcs_set_tear_scanline() - set the scanline to use as trigger for
+ *    the Tearing Effect output signal of the display module
  * @dsi: DSI peripheral device
- * @param: STS[10:0]
+ * @scanline: scanline to use as trigger
+ *
  * Return: 0 on success or a negative error code on failure
  */
-int mipi_dsi_set_tear_scanline(struct mipi_dsi_device *dsi, u16 param)
+int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanline)
 {
-	u8 payload[3] = { MIPI_DCS_SET_TEAR_SCANLINE, param >> 8,
-			  param & 0xff };
+	u8 payload[3] = { MIPI_DCS_SET_TEAR_SCANLINE, scanline >> 8,
+			  scanline & 0xff };
 	ssize_t err;
 
 	err = mipi_dsi_generic_write(dsi, payload, sizeof(payload));
@@ -1018,7 +1018,7 @@ int mipi_dsi_set_tear_scanline(struct mipi_dsi_device *dsi, u16 param)
 
 	return 0;
 }
-EXPORT_SYMBOL(mipi_dsi_set_tear_scanline);
+EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_scanline);
 
 /**
  * mipi_dsi_dcs_set_pixel_format() - sets the pixel format for the RGB image

include/drm/drm_mipi_dsi.h

@@ -265,7 +265,7 @@ int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start,
 				    u16 end);
 int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start,
 				  u16 end);
-int mipi_dsi_set_tear_scanline(struct mipi_dsi_device *dsi, u16 param);
+int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanline);
 int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi);
 int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,
 			     enum mipi_dsi_dcs_tear_mode mode);