drm: rockchip: Support Synopsys DW MIPI DSI

Add support for Synopsys DesignWare MIPI DSI controller which is
embedded in the rk3288 SoCs.
Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Acked-by: Mark Yao <mark.yao@rock-chips.com>

drivers/gpu/drm/rockchip/Kconfig

@@ -25,3 +25,13 @@ config ROCKCHIP_DW_HDMI
 	  for the Synopsys DesignWare HDMI driver. If you want to
 	  enable HDMI on RK3288 based SoC, you should selet this
 	  option.
+
+config ROCKCHIP_DW_MIPI_DSI
+	tristate "Rockchip specific extensions for Synopsys DW MIPI DSI"
+	depends on DRM_ROCKCHIP
+	select DRM_MIPI_DSI
+	help
+	 This selects support for Rockchip SoC specific extensions
+	 for the Synopsys DesignWare HDMI driver. If you want to
+	 enable MIPI DSI on RK3288 based SoC, you should selet this
+	 option.

drivers/gpu/drm/rockchip/Makefile

@@ -6,6 +6,7 @@ rockchipdrm-y := rockchip_drm_drv.o rockchip_drm_fb.o rockchip_drm_fbdev.o \
 		rockchip_drm_gem.o
 
 obj-$(CONFIG_ROCKCHIP_DW_HDMI) += dw_hdmi-rockchip.o
+obj-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi.o
 
 obj-$(CONFIG_DRM_ROCKCHIP) += rockchipdrm.o rockchip_drm_vop.o \
 				rockchip_vop_reg.o

drivers/gpu/drm/rockchip/rockchip_drm_vop.c

@@ -818,6 +818,9 @@ int rockchip_drm_crtc_mode_config(struct drm_crtc *crtc,
 	case DRM_MODE_CONNECTOR_HDMIA:
 		VOP_CTRL_SET(vop, hdmi_en, 1);
 		break;
+	case DRM_MODE_CONNECTOR_DSI:
+		VOP_CTRL_SET(vop, mipi_en, 1);
+		break;
 	default:
 		DRM_ERROR("unsupport connector_type[%d]\n", connector_type);
 		return -EINVAL;