1 files changed, 117 insertions, 0 deletions
diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c
new file mode 100644
index 000000000..b3426a551
--- /dev/null
+++ b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c
@@ -0,0 +1,117 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2016 MediaTek Inc.
+ * Author: Ming Hsiu Tsai <minghsiu.tsai@mediatek.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <soc/mediatek/smi.h>
+
+#include "mtk_mdp_comp.h"
+
+
+void mtk_mdp_comp_clock_on(struct device *dev, struct mtk_mdp_comp *comp)
+{
+	int i, err;
+
+	if (comp->larb_dev) {
+		err = mtk_smi_larb_get(comp->larb_dev);
+		if (err)
+			dev_err(dev,
+				"failed to get larb, err %d. type:%d\n",
+				err, comp->type);
+	}
+
+	for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
+		if (IS_ERR(comp->clk[i]))
+			continue;
+		err = clk_prepare_enable(comp->clk[i]);
+		if (err)
+			dev_err(dev,
+			"failed to enable clock, err %d. type:%d i:%d\n",
+				err, comp->type, i);
+	}
+}
+
+void mtk_mdp_comp_clock_off(struct device *dev, struct mtk_mdp_comp *comp)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
+		if (IS_ERR(comp->clk[i]))
+			continue;
+		clk_disable_unprepare(comp->clk[i]);
+	}
+
+	if (comp->larb_dev)
+		mtk_smi_larb_put(comp->larb_dev);
+}
+
+int mtk_mdp_comp_init(struct device *dev, struct device_node *node,
+		      struct mtk_mdp_comp *comp,
+		      enum mtk_mdp_comp_type comp_type)
+{
+	struct device_node *larb_node;
+	struct platform_device *larb_pdev;
+	int ret;
+	int i;
+
+	comp->dev_node = of_node_get(node);
+	comp->type = comp_type;
+
+	for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
+		comp->clk[i] = of_clk_get(node, i);
+		if (IS_ERR(comp->clk[i])) {
+			if (PTR_ERR(comp->clk[i]) != -EPROBE_DEFER)
+				dev_err(dev, "Failed to get clock\n");
+			ret = PTR_ERR(comp->clk[i]);
+			goto put_dev;
+		}
+
+		/* Only RDMA needs two clocks */
+		if (comp->type != MTK_MDP_RDMA)
+			break;
+	}
+
+	/* Only DMA capable components need the LARB property */
+	comp->larb_dev = NULL;
+	if (comp->type != MTK_MDP_RDMA &&
+	    comp->type != MTK_MDP_WDMA &&
+	    comp->type != MTK_MDP_WROT)
+		return 0;
+
+	larb_node = of_parse_phandle(node, "mediatek,larb", 0);
+	if (!larb_node) {
+		dev_err(dev,
+			"Missing mediadek,larb phandle in %pOF node\n", node);
+		ret = -EINVAL;
+		goto put_dev;
+	}
+
+	larb_pdev = of_find_device_by_node(larb_node);
+	if (!larb_pdev) {
+		dev_warn(dev, "Waiting for larb device %pOF\n", larb_node);
+		of_node_put(larb_node);
+		ret = -EPROBE_DEFER;
+		goto put_dev;
+	}
+	of_node_put(larb_node);
+
+	comp->larb_dev = &larb_pdev->dev;
+
+	return 0;
+
+put_dev:
+	of_node_put(comp->dev_node);
+
+	return ret;
+}
+
+void mtk_mdp_comp_deinit(struct device *dev, struct mtk_mdp_comp *comp)
+{
+	of_node_put(comp->dev_node);
+}