[PATCH v3 12/13] drm/mediatek: Improve compatibility of display driver

[Hsiao Chien Sung <shawn.sung@mediatek.com>]

- Check if the component is defined before using it since
  some modules are MT8188 only (ex. PADDING)
- Use a for-loop to add/remove components in an arrays,
  so we can only maintain this array to make sure every
  component will be initialized properly

Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com>
---
 .../gpu/drm/mediatek/mtk_disp_ovl_adaptor.c   | 128 +++++++++++-------
 1 file changed, 78 insertions(+), 50 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
index c0a38f5217ee..a5f5a0f8ea85 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
@@ -51,6 +51,7 @@ enum mtk_ovl_adaptor_comp_id {

 struct ovl_adaptor_comp_match {
 	enum mtk_ovl_adaptor_comp_type type;
+	enum mtk_ddp_comp_id comp_id;
 	int alias_id;
 };

@@ -67,19 +68,19 @@ static const char * const private_comp_stem[OVL_ADAPTOR_TYPE_NUM] = {
 };

 static const struct ovl_adaptor_comp_match comp_matches[OVL_ADAPTOR_ID_MAX] = {
-	[OVL_ADAPTOR_MDP_RDMA0]	= { OVL_ADAPTOR_TYPE_RDMA, 0 },
-	[OVL_ADAPTOR_MDP_RDMA1]	= { OVL_ADAPTOR_TYPE_RDMA, 1 },
-	[OVL_ADAPTOR_MDP_RDMA2]	= { OVL_ADAPTOR_TYPE_RDMA, 2 },
-	[OVL_ADAPTOR_MDP_RDMA3]	= { OVL_ADAPTOR_TYPE_RDMA, 3 },
-	[OVL_ADAPTOR_MDP_RDMA4]	= { OVL_ADAPTOR_TYPE_RDMA, 4 },
-	[OVL_ADAPTOR_MDP_RDMA5]	= { OVL_ADAPTOR_TYPE_RDMA, 5 },
-	[OVL_ADAPTOR_MDP_RDMA6]	= { OVL_ADAPTOR_TYPE_RDMA, 6 },
-	[OVL_ADAPTOR_MDP_RDMA7]	= { OVL_ADAPTOR_TYPE_RDMA, 7 },
-	[OVL_ADAPTOR_MERGE0]	= { OVL_ADAPTOR_TYPE_MERGE, 1 },
-	[OVL_ADAPTOR_MERGE1]	= { OVL_ADAPTOR_TYPE_MERGE, 2 },
-	[OVL_ADAPTOR_MERGE2]	= { OVL_ADAPTOR_TYPE_MERGE, 3 },
-	[OVL_ADAPTOR_MERGE3]	= { OVL_ADAPTOR_TYPE_MERGE, 4 },
-	[OVL_ADAPTOR_ETHDR0]	= { OVL_ADAPTOR_TYPE_ETHDR, 0 },
+	[OVL_ADAPTOR_MDP_RDMA0] = { OVL_ADAPTOR_TYPE_RDMA, DDP_COMPONENT_MDP_RDMA0, 0 },
+	[OVL_ADAPTOR_MDP_RDMA1] = { OVL_ADAPTOR_TYPE_RDMA, DDP_COMPONENT_MDP_RDMA1, 1 },
+	[OVL_ADAPTOR_MDP_RDMA2] = { OVL_ADAPTOR_TYPE_RDMA, DDP_COMPONENT_MDP_RDMA2, 2 },
+	[OVL_ADAPTOR_MDP_RDMA3] = { OVL_ADAPTOR_TYPE_RDMA, DDP_COMPONENT_MDP_RDMA3, 3 },
+	[OVL_ADAPTOR_MDP_RDMA4] = { OVL_ADAPTOR_TYPE_RDMA, DDP_COMPONENT_MDP_RDMA4, 4 },
+	[OVL_ADAPTOR_MDP_RDMA5] = { OVL_ADAPTOR_TYPE_RDMA, DDP_COMPONENT_MDP_RDMA5, 5 },
+	[OVL_ADAPTOR_MDP_RDMA6] = { OVL_ADAPTOR_TYPE_RDMA, DDP_COMPONENT_MDP_RDMA6, 6 },
+	[OVL_ADAPTOR_MDP_RDMA7] = { OVL_ADAPTOR_TYPE_RDMA, DDP_COMPONENT_MDP_RDMA7, 7 },
+	[OVL_ADAPTOR_MERGE0] = { OVL_ADAPTOR_TYPE_MERGE, DDP_COMPONENT_MERGE1, 1 },
+	[OVL_ADAPTOR_MERGE1] = { OVL_ADAPTOR_TYPE_MERGE, DDP_COMPONENT_MERGE2, 2 },
+	[OVL_ADAPTOR_MERGE2] = { OVL_ADAPTOR_TYPE_MERGE, DDP_COMPONENT_MERGE3, 3 },
+	[OVL_ADAPTOR_MERGE3] = { OVL_ADAPTOR_TYPE_MERGE, DDP_COMPONENT_MERGE4, 4 },
+	[OVL_ADAPTOR_ETHDR0] = { OVL_ADAPTOR_TYPE_ETHDR, DDP_COMPONENT_ETHDR_MIXER, 0 },
 };

 void mtk_ovl_adaptor_layer_config(struct device *dev, unsigned int idx,
@@ -192,6 +193,8 @@ int mtk_ovl_adaptor_clk_enable(struct device *dev)

 	for (i = 0; i < OVL_ADAPTOR_MERGE0; i++) {
 		comp = ovl_adaptor->ovl_adaptor_comp[i];
+		if (!comp)
+			continue;
 		ret = pm_runtime_get_sync(comp);
 		if (ret < 0) {
 			dev_err(dev, "Failed to enable power domain %d, err %d\n", i, ret);
@@ -202,12 +205,23 @@ int mtk_ovl_adaptor_clk_enable(struct device *dev)
 	for (i = 0; i < OVL_ADAPTOR_ID_MAX; i++) {
 		comp = ovl_adaptor->ovl_adaptor_comp[i];

-		if (i < OVL_ADAPTOR_MERGE0)
+		if (!comp)
+			continue;
+
+		switch (comp_matches[i].type) {
+		case OVL_ADAPTOR_TYPE_RDMA:
 			ret = mtk_mdp_rdma_clk_enable(comp);
-		else if (i < OVL_ADAPTOR_ETHDR0)
+			break;
+		case OVL_ADAPTOR_TYPE_MERGE:
 			ret = mtk_merge_clk_enable(comp);
-		else
+			break;
+		case OVL_ADAPTOR_TYPE_ETHDR:
 			ret = mtk_ethdr_clk_enable(comp);
+			break;
+		default:
+			dev_err(dev, "Unknown type: %d\n", comp_matches[i].type);
+		}
+
 		if (ret) {
 			dev_err(dev, "Failed to enable clock %d, err %d\n", i, ret);
 			goto clk_err;
@@ -219,18 +233,33 @@ int mtk_ovl_adaptor_clk_enable(struct device *dev)
 clk_err:
 	while (--i >= 0) {
 		comp = ovl_adaptor->ovl_adaptor_comp[i];
-		if (i < OVL_ADAPTOR_MERGE0)
+
+		if (!comp)
+			continue;
+
+		switch (comp_matches[i].type) {
+		case OVL_ADAPTOR_TYPE_RDMA:
 			mtk_mdp_rdma_clk_disable(comp);
-		else if (i < OVL_ADAPTOR_ETHDR0)
+			break;
+		case OVL_ADAPTOR_TYPE_MERGE:
 			mtk_merge_clk_disable(comp);
-		else
+			break;
+		case OVL_ADAPTOR_TYPE_ETHDR:
 			mtk_ethdr_clk_disable(comp);
+			break;
+		default:
+			dev_err(dev, "Unknown type: %d\n", comp_matches[i].type);
+		}
 	}
 	i = OVL_ADAPTOR_MERGE0;

 pwr_err:
-	while (--i >= 0)
-		pm_runtime_put(ovl_adaptor->ovl_adaptor_comp[i]);
+	while (--i >= 0) {
+		comp = ovl_adaptor->ovl_adaptor_comp[i];
+		if (!comp)
+			continue;
+		pm_runtime_put(comp);
+	}

 	return ret;
 }
@@ -244,13 +273,22 @@ void mtk_ovl_adaptor_clk_disable(struct device *dev)
 	for (i = 0; i < OVL_ADAPTOR_ID_MAX; i++) {
 		comp = ovl_adaptor->ovl_adaptor_comp[i];

-		if (i < OVL_ADAPTOR_MERGE0) {
+		if (!comp)
+			continue;
+
+		switch (comp_matches[i].type) {
+		case OVL_ADAPTOR_TYPE_RDMA:
 			mtk_mdp_rdma_clk_disable(comp);
 			pm_runtime_put(comp);
-		} else if (i < OVL_ADAPTOR_ETHDR0) {
+			break;
+		case OVL_ADAPTOR_TYPE_MERGE:
 			mtk_merge_clk_disable(comp);
-		} else {
+			break;
+		case OVL_ADAPTOR_TYPE_ETHDR:
 			mtk_ethdr_clk_disable(comp);
+			break;
+		default:
+			dev_err(dev, "Unknown type: %d\n", comp_matches[i].type);
 		}
 	}
 }
@@ -313,36 +351,26 @@ size_t mtk_ovl_adaptor_get_num_formats(struct device *dev)

 void mtk_ovl_adaptor_add_comp(struct device *dev, struct mtk_mutex *mutex)
 {
-	mtk_mutex_add_comp(mutex, DDP_COMPONENT_MDP_RDMA0);
-	mtk_mutex_add_comp(mutex, DDP_COMPONENT_MDP_RDMA1);
-	mtk_mutex_add_comp(mutex, DDP_COMPONENT_MDP_RDMA2);
-	mtk_mutex_add_comp(mutex, DDP_COMPONENT_MDP_RDMA3);
-	mtk_mutex_add_comp(mutex, DDP_COMPONENT_MDP_RDMA4);
-	mtk_mutex_add_comp(mutex, DDP_COMPONENT_MDP_RDMA5);
-	mtk_mutex_add_comp(mutex, DDP_COMPONENT_MDP_RDMA6);
-	mtk_mutex_add_comp(mutex, DDP_COMPONENT_MDP_RDMA7);
-	mtk_mutex_add_comp(mutex, DDP_COMPONENT_MERGE1);
-	mtk_mutex_add_comp(mutex, DDP_COMPONENT_MERGE2);
-	mtk_mutex_add_comp(mutex, DDP_COMPONENT_MERGE3);
-	mtk_mutex_add_comp(mutex, DDP_COMPONENT_MERGE4);
-	mtk_mutex_add_comp(mutex, DDP_COMPONENT_ETHDR_MIXER);
+	struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
+	int i;
+
+	for (i = 0; i < OVL_ADAPTOR_ID_MAX; i++) {
+		if (!ovl_adaptor->ovl_adaptor_comp[i])
+			continue;
+		mtk_mutex_add_comp(mutex, comp_matches[i].comp_id);
+	}
 }

 void mtk_ovl_adaptor_remove_comp(struct device *dev, struct mtk_mutex *mutex)
 {
-	mtk_mutex_remove_comp(mutex, DDP_COMPONENT_MDP_RDMA0);
-	mtk_mutex_remove_comp(mutex, DDP_COMPONENT_MDP_RDMA1);
-	mtk_mutex_remove_comp(mutex, DDP_COMPONENT_MDP_RDMA2);
-	mtk_mutex_remove_comp(mutex, DDP_COMPONENT_MDP_RDMA3);
-	mtk_mutex_remove_comp(mutex, DDP_COMPONENT_MDP_RDMA4);
-	mtk_mutex_remove_comp(mutex, DDP_COMPONENT_MDP_RDMA5);
-	mtk_mutex_remove_comp(mutex, DDP_COMPONENT_MDP_RDMA6);
-	mtk_mutex_remove_comp(mutex, DDP_COMPONENT_MDP_RDMA7);
-	mtk_mutex_remove_comp(mutex, DDP_COMPONENT_MERGE1);
-	mtk_mutex_remove_comp(mutex, DDP_COMPONENT_MERGE2);
-	mtk_mutex_remove_comp(mutex, DDP_COMPONENT_MERGE3);
-	mtk_mutex_remove_comp(mutex, DDP_COMPONENT_MERGE4);
-	mtk_mutex_remove_comp(mutex, DDP_COMPONENT_ETHDR_MIXER);
+	struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
+	int i;
+
+	for (i = 0; i < OVL_ADAPTOR_ID_MAX; i++) {
+		if (!ovl_adaptor->ovl_adaptor_comp[i])
+			continue;
+		mtk_mutex_remove_comp(mutex, comp_matches[i].comp_id);
+	}
 }

 void mtk_ovl_adaptor_connect(struct device *dev, struct device *mmsys_dev, unsigned int next)
--
2.18.0