[PATCH v1 1/1] drm/mediatek: add function to match the connector and crtc

[Stu Hsieh <stu.hsieh@mediatek.com>]

This patch add function to match the connector and crtc

Because the connector set the possible_crtc to match the crtc.

This function would search the connector in every ddp path and
return the corresponding value for possible_crtc.

Change-Id: Id51de53b95039f8174462d483eb9bfee31b3b93b
Signed-off-by: Stu Hsieh <stu.hsieh@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 41 +++++++++++++++++++++++++++++
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  2 ++
 2 files changed, 43 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index ff974d82a4a6..1f734b806a00 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -245,6 +245,22 @@ static const struct mtk_ddp_comp_match mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
 	[DDP_COMPONENT_WDMA1]	= { MTK_DISP_WDMA,	1, NULL },
 };
 
+static bool mtk_drm_find_comp_in_ddp(struct mtk_ddp_comp ddp_comp,
+				     const enum mtk_ddp_comp_id *path,
+				     unsigned int path_len)
+{
+	int i;
+
+	if (!path)
+		return false;
+
+	for (i = 0; i < path_len; i++)
+		if (ddp_comp.id == path[i])
+			return true;
+
+	return false;
+}
+
 int mtk_ddp_comp_get_id(struct device_node *node,
 			enum mtk_ddp_comp_type comp_type)
 {
@@ -260,6 +276,31 @@ int mtk_ddp_comp_get_id(struct device_node *node,
 	return -EINVAL;
 }
 
+unsigned int mtk_drm_find_possible_crtc_by_comp(struct drm_device *drm,
+						struct mtk_ddp_comp ddp_comp)
+{
+	struct mtk_drm_private *private = drm->dev_private;
+	unsigned int ret;
+
+	if (mtk_drm_find_comp_in_ddp(ddp_comp, private->data->main_path,
+				     private->data->main_len) == true) {
+		ret = BIT(0);
+	} else if (mtk_drm_find_comp_in_ddp(ddp_comp,
+					    private->data->ext_path,
+					    private->data->ext_len) == true) {
+		ret = BIT(1);
+	} else if (mtk_drm_find_comp_in_ddp(ddp_comp,
+					    private->data->third_path,
+					    private->data->third_len) == true) {
+		ret = BIT(2);
+	} else {
+		DRM_INFO("Failed to find comp in ddp table\n");
+		ret = 0;
+	}
+
+	return ret;
+}
+
 int mtk_ddp_comp_init(struct device *dev, struct device_node *node,
 		      struct mtk_ddp_comp *comp, enum mtk_ddp_comp_id comp_id,
 		      const struct mtk_ddp_comp_funcs *funcs)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index 8399229e6ad2..f882e69088b8 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -166,6 +166,8 @@ static inline void mtk_ddp_gamma_set(struct mtk_ddp_comp *comp,
 		comp->funcs->gamma_set(comp, state);
 }
 
+unsigned int mtk_drm_find_possible_crtc_by_comp(struct drm_device *drm,
+						struct mtk_ddp_comp ddp_comp);
 int mtk_ddp_comp_get_id(struct device_node *node,
 			enum mtk_ddp_comp_type comp_type);
 int mtk_ddp_comp_init(struct device *dev, struct device_node *comp_node,
-- 
2.12.5.2.gbdf23ab