drm/omap: dsi: split video mode enable/disable into separate func

Clean up the code by separating video-mode enable/disable code into
functions of their own.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201215104657.802264-81-tomi.valkeinen@ti.com

drivers/gpu/drm/omapdrm/dss/dsi.c

@@ -3209,12 +3209,61 @@ static int dsi_configure_pins(struct dsi_data *dsi,
 	return 0;
 }
 
-static void dsi_enable_video_output(struct omap_dss_device *dssdev, int vc)
+static int dsi_enable_video_mode(struct dsi_data *dsi, int vc)
 {
-	struct dsi_data *dsi = to_dsi_data(dssdev);
 	int bpp = mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt);
 	u8 data_type;
 	u16 word_count;
+
+	switch (dsi->pix_fmt) {
+	case MIPI_DSI_FMT_RGB888:
+		data_type = MIPI_DSI_PACKED_PIXEL_STREAM_24;
+		break;
+	case MIPI_DSI_FMT_RGB666:
+		data_type = MIPI_DSI_PIXEL_STREAM_3BYTE_18;
+		break;
+	case MIPI_DSI_FMT_RGB666_PACKED:
+		data_type = MIPI_DSI_PACKED_PIXEL_STREAM_18;
+		break;
+	case MIPI_DSI_FMT_RGB565:
+		data_type = MIPI_DSI_PACKED_PIXEL_STREAM_16;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	dsi_if_enable(dsi, false);
+	dsi_vc_enable(dsi, vc, false);
+
+	/* MODE, 1 = video mode */
+	REG_FLD_MOD(dsi, DSI_VC_CTRL(vc), 1, 4, 4);
+
+	word_count = DIV_ROUND_UP(dsi->vm.hactive * bpp, 8);
+
+	dsi_vc_write_long_header(dsi, vc, dsi->dsidev->channel, data_type,
+			word_count, 0);
+
+	dsi_vc_enable(dsi, vc, true);
+	dsi_if_enable(dsi, true);
+
+	return 0;
+}
+
+static void dsi_disable_video_mode(struct dsi_data *dsi, int vc)
+{
+	dsi_if_enable(dsi, false);
+	dsi_vc_enable(dsi, vc, false);
+
+	/* MODE, 0 = command mode */
+	REG_FLD_MOD(dsi, DSI_VC_CTRL(vc), 0, 4, 4);
+
+	dsi_vc_enable(dsi, vc, true);
+	dsi_if_enable(dsi, true);
+}
+
+static void dsi_enable_video_output(struct omap_dss_device *dssdev, int vc)
+{
+	struct dsi_data *dsi = to_dsi_data(dssdev);
 	int r;
 
 	r = dsi_init_dispc(dsi);
@@ -3224,37 +3273,9 @@ static void dsi_enable_video_output(struct omap_dss_device *dssdev, int vc)
 	}
 
 	if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
-		switch (dsi->pix_fmt) {
-		case MIPI_DSI_FMT_RGB888:
-			data_type = MIPI_DSI_PACKED_PIXEL_STREAM_24;
-			break;
-		case MIPI_DSI_FMT_RGB666:
-			data_type = MIPI_DSI_PIXEL_STREAM_3BYTE_18;
-			break;
-		case MIPI_DSI_FMT_RGB666_PACKED:
-			data_type = MIPI_DSI_PACKED_PIXEL_STREAM_18;
-			break;
-		case MIPI_DSI_FMT_RGB565:
-			data_type = MIPI_DSI_PACKED_PIXEL_STREAM_16;
-			break;
-		default:
-			r = -EINVAL;
-			goto err_pix_fmt;
-		}
-
-		dsi_if_enable(dsi, false);
-		dsi_vc_enable(dsi, vc, false);
-
-		/* MODE, 1 = video mode */
-		REG_FLD_MOD(dsi, DSI_VC_CTRL(vc), 1, 4, 4);
-
-		word_count = DIV_ROUND_UP(dsi->vm.hactive * bpp, 8);
-
-		dsi_vc_write_long_header(dsi, vc, dsi->dsidev->channel, data_type,
-				word_count, 0);
-
-		dsi_vc_enable(dsi, vc, true);
-		dsi_if_enable(dsi, true);
+		r = dsi_enable_video_mode(dsi, vc);
+		if (r)
+			goto err_video_mode;
 	}
 
 	r = dss_mgr_enable(&dsi->output);
@@ -3268,7 +3289,7 @@ static void dsi_enable_video_output(struct omap_dss_device *dssdev, int vc)
 		dsi_if_enable(dsi, false);
 		dsi_vc_enable(dsi, vc, false);
 	}
-err_pix_fmt:
+err_video_mode:
 	dsi_uninit_dispc(dsi);
 	dev_err(dsi->dev, "failed to enable DSI encoder!\n");
 	return;
@@ -3278,16 +3299,8 @@ static void dsi_disable_video_output(struct omap_dss_device *dssdev, int vc)
 {
 	struct dsi_data *dsi = to_dsi_data(dssdev);
 
-	if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
-		dsi_if_enable(dsi, false);
-		dsi_vc_enable(dsi, vc, false);
-
-		/* MODE, 0 = command mode */
-		REG_FLD_MOD(dsi, DSI_VC_CTRL(vc), 0, 4, 4);
-
-		dsi_vc_enable(dsi, vc, true);
-		dsi_if_enable(dsi, true);
-	}
+	if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE)
+		dsi_disable_video_mode(dsi, vc);
 
 	dss_mgr_disable(&dsi->output);