media: mtk-mdp: Get rid of mtk_smi_larb_get/put

MediaTek IOMMU has already added the device_link between the consumer
and smi-larb device. If the mdp device calls the pm_runtime_get_sync,
the smi-larb's pm_runtime_get_sync also be called automatically.

CC: Minghsiu Tsai <[e-mail]>
Signed-off-by: Yong Wu <[e-mail]>
Reviewed-by: Evan Green <[e-mail]>
Reviewed-by: Houlong Wei <[e-mail]>
Reviewed-by: Dafna Hirschfeld <[e-mail]>
Reviewed-by: AngeloGioacchino Del Regno <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/platform/mtk-mdp/mtk_mdp_comp.c

···
 #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;
 		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;
 
···
 		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;
 

drivers/media/platform/mtk-mdp/mtk_mdp_comp.h

···
  * @node:	list node to track sibing MDP components
  * @dev_node:	component device node
  * @clk:	clocks required for component
- * @larb_dev:	SMI device required for component
  * @type:	component type
  */
 struct mtk_mdp_comp {
 	struct list_head	node;
 	struct device_node	*dev_node;
 	struct clk		*clk[2];
-	struct device		*larb_dev;
 	enum mtk_mdp_comp_type	type;
 };
 

drivers/media/platform/mtk-mdp/mtk_mdp_core.c

···
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/workqueue.h>
-#include <soc/mediatek/smi.h>
 
 #include "mtk_mdp_core.h"
 #include "mtk_mdp_m2m.h"