[PATCH v3 08/14] drm/mediatek: Get rid of mtk_smi_larb_get/put

[Yong Wu <yong.wu@xxxxxxxxxxxx>]

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

CC: CK Hu <ck.hu@xxxxxxxxxxxx>
CC: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
Signed-off-by: Yong Wu <yong.wu@xxxxxxxxxxxx>
Reviewed-by: Evan Green <evgreen@xxxxxxxxxxxx>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c     | 14 +-------------
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 30 -----------------------------
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  1 -
 3 files changed, 1 insertion(+), 44 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index a900721..c1e891e 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -10,7 +10,6 @@
 #include <drm/drm_probe_helper.h>
 #include <linux/clk.h>
 #include <linux/pm_runtime.h>
-#include <soc/mediatek/smi.h>
 
 #include "mtk_drm_drv.h"
 #include "mtk_drm_crtc.h"
@@ -359,22 +358,13 @@ static void mtk_drm_crtc_atomic_enable(struct drm_crtc *crtc,
 				       struct drm_crtc_state *old_state)
 {
 	struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
-	struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
 	int ret;
 
 	DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
 
-	ret = mtk_smi_larb_get(comp->larb_dev);
-	if (ret) {
-		DRM_ERROR("Failed to get larb: %d\n", ret);
-		return;
-	}
-
 	ret = mtk_crtc_ddp_hw_init(mtk_crtc);
-	if (ret) {
-		mtk_smi_larb_put(comp->larb_dev);
+	if (ret)
 		return;
-	}
 
 	drm_crtc_vblank_on(crtc);
 	mtk_crtc->enabled = true;
@@ -384,7 +374,6 @@ static void mtk_drm_crtc_atomic_disable(struct drm_crtc *crtc,
 					struct drm_crtc_state *old_state)
 {
 	struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
-	struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
 	int i;
 
 	DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
@@ -407,7 +396,6 @@ static void mtk_drm_crtc_atomic_disable(struct drm_crtc *crtc,
 
 	drm_crtc_vblank_off(crtc);
 	mtk_crtc_ddp_hw_fini(mtk_crtc);
-	mtk_smi_larb_put(comp->larb_dev);
 
 	mtk_crtc->enabled = false;
 }
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index b38963f..7dc8496 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -256,15 +256,9 @@ int mtk_ddp_comp_init(struct device *dev, struct device_node *node,
 		      struct mtk_ddp_comp *comp, enum mtk_ddp_comp_id comp_id,
 		      const struct mtk_ddp_comp_funcs *funcs)
 {
-	enum mtk_ddp_comp_type type;
-	struct device_node *larb_node;
-	struct platform_device *larb_pdev;
-
 	if (comp_id < 0 || comp_id >= DDP_COMPONENT_ID_MAX)
 		return -EINVAL;
 
-	type = mtk_ddp_matches[comp_id].type;
-
 	comp->id = comp_id;
 	comp->funcs = funcs ?: mtk_ddp_matches[comp_id].funcs;
 
@@ -288,30 +282,6 @@ int mtk_ddp_comp_init(struct device *dev, struct device_node *node,
 	if (IS_ERR(comp->clk))
 		return PTR_ERR(comp->clk);
 
-	/* Only DMA capable components need the LARB property */
-	comp->larb_dev = NULL;
-	if (type != MTK_DISP_OVL &&
-	    type != MTK_DISP_RDMA &&
-	    type != MTK_DISP_WDMA)
-		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/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index 0ad287f..108de60 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -83,7 +83,6 @@ struct mtk_ddp_comp {
 	struct clk *clk;
 	void __iomem *regs;
 	int irq;
-	struct device *larb_dev;
 	enum mtk_ddp_comp_id id;
 	const struct mtk_ddp_comp_funcs *funcs;
 };
-- 
1.9.1