media: mtk-jpeg: refactor hw dev initializaiton

Add a atomic_t variable for initialization of hw dev.
Signed-off-by: kyrie wu <kyrie.wu@mediatek.com>
Signed-off-by: irui wang <irui.wang@mediatek.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c

@@ -1742,6 +1742,7 @@ static int mtk_jpeg_probe(struct platform_device *pdev)
 			num_child++;
 
 		atomic_set(&jpeg->hw_rdy, num_child);
+		atomic_set(&jpeg->hw_index, 0);
 
 		jpeg->workqueue = alloc_ordered_workqueue(MTK_JPEG_NAME,
 							  WQ_MEM_RECLAIM

drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.h

@@ -208,6 +208,7 @@ struct mtk_jpegdec_comp_dev {
  * @hw_rdy:		jpg hw ready flag
  * @reg_decbase:	jpg decode register base addr
  * @dec_hw_dev:	jpg decode hardware device
+ * @hw_index:		jpg hw index
  */
 struct mtk_jpeg_dev {
 	struct mutex		lock;
@@ -229,6 +230,7 @@ struct mtk_jpeg_dev {
 
 	void __iomem *reg_decbase[MTK_JPEGDEC_HW_MAX];
 	struct mtk_jpegdec_comp_dev *dec_hw_dev[MTK_JPEGDEC_HW_MAX];
+	atomic_t hw_index;
 };
 
 /**

drivers/media/platform/mediatek/jpeg/mtk_jpeg_dec_hw.c

@@ -638,14 +638,10 @@ static int mtk_jpegdec_hw_probe(struct platform_device *pdev)
 		return dev_err_probe(&pdev->dev, ret,
 				     "Failed to register JPEGDEC irq handler.\n");
 
-	for (i = 0; i < MTK_JPEGDEC_HW_MAX; i++) {
-		if (master_dev->dec_hw_dev[i])
-			continue;
-
+	i = atomic_add_return(1, &master_dev->hw_index) - 1;
 	master_dev->dec_hw_dev[i] = dev;
 	master_dev->reg_decbase[i] = dev->reg_base;
 	dev->master_dev = master_dev;
-	}
 
 	platform_set_drvdata(pdev, dev);
 	pm_runtime_enable(&pdev->dev);

drivers/media/platform/mediatek/jpeg/mtk_jpeg_enc_hw.c

@@ -362,14 +362,10 @@ static int mtk_jpegenc_hw_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	for (i = 0; i < MTK_JPEGENC_HW_MAX; i++) {
-		if (master_dev->enc_hw_dev[i])
-			continue;
-
+	i = atomic_add_return(1, &master_dev->hw_index) - 1;
 	master_dev->enc_hw_dev[i] = dev;
 	master_dev->reg_encbase[i] = dev->reg_base;
 	dev->master_dev = master_dev;
-	}
 
 	platform_set_drvdata(pdev, dev);
 	pm_runtime_enable(&pdev->dev);