Re: [PATCH v6 05/11] media: mtk-mdp: Get rid of mtk_smi_larb_get/put

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On 14.07.21 04:56, Yong Wu wrote:
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.tsai@xxxxxxxxxxxx>
CC: Houlong Wei <houlong.wei@xxxxxxxxxxxx>
Signed-off-by: Yong Wu <yong.wu@xxxxxxxxxxxx>
Reviewed-by: Evan Green <evgreen@xxxxxxxxxxxx>
Reviewed-by: Houlong Wei <houlong.wei@xxxxxxxxxxxx>

Reviewed-by: Dafna Hirschfeld <dafna.hirschfeld@xxxxxxxxxxxxx>

---
  drivers/media/platform/mtk-mdp/mtk_mdp_comp.c | 46 +------------------
  drivers/media/platform/mtk-mdp/mtk_mdp_comp.h |  2 -
  drivers/media/platform/mtk-mdp/mtk_mdp_core.c |  1 -
  3 files changed, 1 insertion(+), 48 deletions(-)

diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c
index de2d425efdd1..5e0ea83a9f7f 100644
--- a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c
+++ b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c
@@ -13,7 +13,6 @@
  #include <linux/of.h>
  #include <linux/of_irq.h>
  #include <linux/of_platform.h>
-#include <soc/mediatek/smi.h>
  #include <linux/pm_runtime.h>
#include "mtk_mdp_comp.h"
@@ -57,13 +56,6 @@ int mtk_mdp_comp_power_on(struct mtk_mdp_comp *comp)
  {
  	int status, err;
- if (comp->larb_dev) {
-		err = mtk_smi_larb_get(comp->larb_dev);
-		if (err)
-			dev_err(comp->dev,
-				"failed to get larb, err %d.\n", err);
-	}
-
  	err = pm_runtime_get_sync(comp->dev);
  	if (err < 0) {
  		dev_err(comp->dev, "failed to runtime get, err %d.\n", err);
@@ -146,9 +138,6 @@ void mtk_mdp_comp_clock_off(struct mtk_mdp_comp *comp)
  			continue;
  		clk_disable_unprepare(comp->clk[i]);
  	}
-
-	if (comp->larb_dev)
-		mtk_smi_larb_put(comp->larb_dev);
  }
/*
@@ -236,9 +225,6 @@ static const struct component_ops mtk_mdp_component_ops = {
int mtk_mdp_comp_init(struct mtk_mdp_comp *comp, struct device *dev)
  {
-	struct device_node *larb_node;
-	struct platform_device *larb_pdev;
-	int ret;
  	int i;
  	struct device_node *node = dev->of_node;
  	enum mtk_mdp_comp_type comp_type =
@@ -252,8 +238,7 @@ int mtk_mdp_comp_init(struct mtk_mdp_comp *comp, struct device *dev)
  		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 err;
+			return PTR_ERR(comp->clk[i]);
  		}
/* Only RDMA needs two clocks */
@@ -261,36 +246,7 @@ int mtk_mdp_comp_init(struct mtk_mdp_comp *comp, struct device *dev)
  			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 err;
-	}
-
-	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 err;
-	}
-	of_node_put(larb_node);
-
-	comp->larb_dev = &larb_pdev->dev;
-
  	return 0;
-
-err:
-	return ret;
  }
static int mtk_mdp_comp_probe(struct platform_device *pdev)
diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h
index 5201c47f7baa..2bd229cc7eae 100644
--- a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h
+++ b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h
@@ -11,13 +11,11 @@
   * struct mtk_mdp_comp - the MDP's function component data
   * @node:	list node to track sibing MDP components
   * @clk:	clocks required for component
- * @larb_dev:	SMI device required for component
   * @dev:	component's device
   */
  struct mtk_mdp_comp {
  	struct list_head	node;
  	struct clk		*clk[2];
-	struct device           *larb_dev;
  	struct device		*dev;
  };
diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
index e1fb39231248..be7d35b3e3ff 100644
--- a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
+++ b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
@@ -18,7 +18,6 @@
  #include <linux/platform_device.h>
  #include <linux/pm_runtime.h>
  #include <linux/workqueue.h>
-#include <soc/mediatek/smi.h>
#include "mtk_mdp_comp.h"
  #include "mtk_mdp_core.h"




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