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

CC: Minghsiu Tsai <minghsiu.t...@mediatek.com>
Signed-off-by: Yong Wu <yong...@mediatek.com>
Reviewed-by: Evan Green <evgr...@chromium.org>
---
 drivers/media/platform/mtk-mdp/mtk_mdp_comp.c | 38 ---------------------------
 drivers/media/platform/mtk-mdp/mtk_mdp_comp.h |  2 --
 drivers/media/platform/mtk-mdp/mtk_mdp_core.c |  1 -
 3 files changed, 41 deletions(-)

diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c 
b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c
index 9afe816..5985a9b 100644
--- a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c
+++ b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c
@@ -9,7 +9,6 @@
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_platform.h>
-#include <soc/mediatek/smi.h>
 
 #include "mtk_mdp_comp.h"
 
@@ -58,14 +57,6 @@ 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 id:%d\n",
-                               err, comp->type, comp->id);
-       }
-
        for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
                if (IS_ERR(comp->clk[i]))
                        continue;
@@ -86,16 +77,11 @@ void mtk_mdp_comp_clock_off(struct device *dev, struct 
mtk_mdp_comp *comp)
                        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_id comp_id)
 {
-       struct device_node *larb_node;
-       struct platform_device *larb_pdev;
        int i;
 
        if (comp_id < 0 || comp_id >= MTK_MDP_COMP_ID_MAX) {
@@ -116,30 +102,6 @@ int mtk_mdp_comp_init(struct device *dev, struct 
device_node *node,
                        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);
-               return -EINVAL;
-       }
-
-       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);
-               return -EPROBE_DEFER;
-       }
-       of_node_put(larb_node);
-
-       comp->larb_dev = &larb_pdev->dev;
-
        return 0;
 }
 
diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h 
b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h
index 998a4b9..a2da8df 100644
--- a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h
+++ b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h
@@ -39,7 +39,6 @@ enum mtk_mdp_comp_id {
  * @dev_node:  component device node
  * @clk:       clocks required for component
  * @regs:      Mapped address of component registers.
- * @larb_dev:  SMI device required for component
  * @type:      component type
  * @id:                component ID
  */
@@ -47,7 +46,6 @@ struct mtk_mdp_comp {
        struct device_node      *dev_node;
        struct clk              *clk[2];
        void __iomem            *regs;
-       struct device           *larb_dev;
        enum mtk_mdp_comp_type  type;
        enum mtk_mdp_comp_id    id;
 };
diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c 
b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
index fc9faec..c237ed9 100644
--- a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
+++ b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
@@ -17,7 +17,6 @@
 #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"
-- 
1.9.1

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