drm/mediatek: add component DSI2

This patch add the component DSI2
Signed-off-by: Stu Hsieh <stu.hsieh@mediatek.com>
Signed-off-by: CK Hu <ck.hu@mediatek.com>

drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c

@@ -227,6 +227,7 @@ static const struct mtk_ddp_comp_match mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
 	[DDP_COMPONENT_DPI1]	= { MTK_DPI,		1, NULL },
 	[DDP_COMPONENT_DSI0]	= { MTK_DSI,		0, NULL },
 	[DDP_COMPONENT_DSI1]	= { MTK_DSI,		1, NULL },
+	[DDP_COMPONENT_DSI2]	= { MTK_DSI,		2, NULL },
 	[DDP_COMPONENT_GAMMA]	= { MTK_DISP_GAMMA,	0, &ddp_gamma },
 	[DDP_COMPONENT_OD0]	= { MTK_DISP_OD,	0, &ddp_od },
 	[DDP_COMPONENT_OD1]	= { MTK_DISP_OD,	1, &ddp_od },
@@ -278,6 +279,7 @@ int mtk_ddp_comp_init(struct device *dev, struct device_node *node,
 	    comp_id == DDP_COMPONENT_DPI0 ||
 	    comp_id == DDP_COMPONENT_DPI1 ||
 	    comp_id == DDP_COMPONENT_DSI0 ||
+	    comp_id == DDP_COMPONENT_DSI2 ||
 	    comp_id == DDP_COMPONENT_PWM0) {
 		comp->regs = NULL;
 		comp->clk = NULL;

drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h

@@ -50,6 +50,7 @@ enum mtk_ddp_comp_id {
 	DDP_COMPONENT_DPI1,
 	DDP_COMPONENT_DSI0,
 	DDP_COMPONENT_DSI1,
+	DDP_COMPONENT_DSI2,
 	DDP_COMPONENT_GAMMA,
 	DDP_COMPONENT_OD0,
 	DDP_COMPONENT_OD1,