drm/mediatek: Add DSI sub driver

This patch add a drm encoder/connector driver for the MIPI DSI function
block of the Mediatek display subsystem and a phy driver for the MIPI TX
D-PHY control module.
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

drivers/gpu/drm/mediatek/Kconfig

@@ -4,6 +4,8 @@ config DRM_MEDIATEK
 	depends on ARCH_MEDIATEK || (ARM && COMPILE_TEST)
 	select DRM_GEM_CMA_HELPER
 	select DRM_KMS_HELPER
+	select DRM_MIPI_DSI
+	select DRM_PANEL
 	select IOMMU_DMA
 	select MEMORY
 	select MTK_SMI

drivers/gpu/drm/mediatek/Makefile

@@ -6,6 +6,8 @@ mediatek-drm-y := mtk_disp_ovl.o \
 		  mtk_drm_drv.o \
 		  mtk_drm_fb.o \
 		  mtk_drm_gem.o \
-		  mtk_drm_plane.o
+		  mtk_drm_plane.o \
+		  mtk_dsi.o \
+		  mtk_mipi_tx.o
 
 obj-$(CONFIG_DRM_MEDIATEK) += mediatek-drm.o

drivers/gpu/drm/mediatek/mtk_drm_drv.c

@@ -523,6 +523,8 @@ static struct platform_driver * const mtk_drm_drivers[] = {
 	&mtk_disp_ovl_driver,
 	&mtk_disp_rdma_driver,
 	&mtk_drm_platform_driver,
+	&mtk_dsi_driver,
+	&mtk_mipi_tx_driver,
 };
 
 static int __init mtk_drm_init(void)

drivers/gpu/drm/mediatek/mtk_drm_drv.h

@@ -53,5 +53,7 @@ struct mtk_drm_private {
 extern struct platform_driver mtk_ddp_driver;
 extern struct platform_driver mtk_disp_ovl_driver;
 extern struct platform_driver mtk_disp_rdma_driver;
+extern struct platform_driver mtk_dsi_driver;
+extern struct platform_driver mtk_mipi_tx_driver;
 
 #endif /* MTK_DRM_DRV_H */