[PATCH v2,1/7] media: mediatek: vcodec: Get the chip name for each platform

[Yunfei Dong]

Store the name of the chip in the context of the driver in order
to be able to choose the correct configuration values for the
different codecs.
Use a enum value instead of an integer to store a more descriptive name.

Signed-off-by: Yunfei Dong <yunfei.dong@xxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Reviewed-by: Sebastian Fricke <sebastian.fricke@xxxxxxxxxxxxx>
---
 .../mediatek/vcodec/decoder/mtk_vcodec_dec.c  | 24 +----------------
 .../vcodec/decoder/mtk_vcodec_dec_drv.c       | 26 +++++++++++++++++++
 .../vcodec/decoder/mtk_vcodec_dec_drv.h       | 14 ++++++++++
 3 files changed, 41 insertions(+), 23 deletions(-)

diff --git a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec.c b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec.c
index 91ed576d6821..ba742f0e391d 100644
--- a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec.c
+++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec.c
@@ -208,36 +208,14 @@ static int vidioc_vdec_dqbuf(struct file *file, void *priv,
 	return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
 }
 
-static int mtk_vcodec_dec_get_chip_name(void *priv)
-{
-	struct mtk_vcodec_dec_ctx *ctx = fh_to_dec_ctx(priv);
-	struct device *dev = &ctx->dev->plat_dev->dev;
-
-	if (of_device_is_compatible(dev->of_node, "mediatek,mt8173-vcodec-dec"))
-		return 8173;
-	else if (of_device_is_compatible(dev->of_node, "mediatek,mt8183-vcodec-dec"))
-		return 8183;
-	else if (of_device_is_compatible(dev->of_node, "mediatek,mt8192-vcodec-dec"))
-		return 8192;
-	else if (of_device_is_compatible(dev->of_node, "mediatek,mt8195-vcodec-dec"))
-		return 8195;
-	else if (of_device_is_compatible(dev->of_node, "mediatek,mt8186-vcodec-dec"))
-		return 8186;
-	else if (of_device_is_compatible(dev->of_node, "mediatek,mt8188-vcodec-dec"))
-		return 8188;
-	else
-		return 8173;
-}
-
 static int vidioc_vdec_querycap(struct file *file, void *priv,
 				struct v4l2_capability *cap)
 {
 	struct mtk_vcodec_dec_ctx *ctx = fh_to_dec_ctx(priv);
 	struct device *dev = &ctx->dev->plat_dev->dev;
-	int platform_name = mtk_vcodec_dec_get_chip_name(priv);
 
 	strscpy(cap->driver, dev->driver->name, sizeof(cap->driver));
-	snprintf(cap->card, sizeof(cap->card), "MT%d video decoder", platform_name);
+	snprintf(cap->card, sizeof(cap->card), "MT%d video decoder", ctx->dev->chip_name);
 
 	return 0;
 }
diff --git a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c
index 0a89ce452ac3..f47c98faf068 100644
--- a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c
+++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.c
@@ -326,6 +326,26 @@ static const struct v4l2_file_operations mtk_vcodec_fops = {
 	.mmap		= v4l2_m2m_fop_mmap,
 };
 
+static void mtk_vcodec_dec_get_chip_name(struct mtk_vcodec_dec_dev *vdec_dev)
+{
+	struct device *dev = &vdec_dev->plat_dev->dev;
+
+	if (of_device_is_compatible(dev->of_node, "mediatek,mt8173-vcodec-dec"))
+		vdec_dev->chip_name = MTK_VDEC_MT8173;
+	else if (of_device_is_compatible(dev->of_node, "mediatek,mt8183-vcodec-dec"))
+		vdec_dev->chip_name = MTK_VDEC_MT8183;
+	else if (of_device_is_compatible(dev->of_node, "mediatek,mt8192-vcodec-dec"))
+		vdec_dev->chip_name = MTK_VDEC_MT8192;
+	else if (of_device_is_compatible(dev->of_node, "mediatek,mt8195-vcodec-dec"))
+		vdec_dev->chip_name = MTK_VDEC_MT8195;
+	else if (of_device_is_compatible(dev->of_node, "mediatek,mt8186-vcodec-dec"))
+		vdec_dev->chip_name = MTK_VDEC_MT8186;
+	else if (of_device_is_compatible(dev->of_node, "mediatek,mt8188-vcodec-dec"))
+		vdec_dev->chip_name = MTK_VDEC_MT8188;
+	else
+		vdec_dev->chip_name = MTK_VDEC_INVAL;
+}
+
 static int mtk_vcodec_probe(struct platform_device *pdev)
 {
 	struct mtk_vcodec_dec_dev *dev;
@@ -341,6 +361,12 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
 	INIT_LIST_HEAD(&dev->ctx_list);
 	dev->plat_dev = pdev;
 
+	mtk_vcodec_dec_get_chip_name(dev);
+	if (dev->chip_name == MTK_VDEC_INVAL) {
+		dev_err(&pdev->dev, "Failed to get decoder chip name");
+		return -EINVAL;
+	}
+
 	dev->vdec_pdata = of_device_get_match_data(&pdev->dev);
 	if (!of_property_read_u32(pdev->dev.of_node, "mediatek,vpu",
 				  &rproc_phandle)) {
diff --git a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h
index 7e36b2c69b7d..849b89dd205c 100644
--- a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h
+++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h
@@ -18,6 +18,16 @@
 #define IS_VDEC_LAT_ARCH(hw_arch) ((hw_arch) >= MTK_VDEC_LAT_SINGLE_CORE)
 #define IS_VDEC_INNER_RACING(capability) ((capability) & MTK_VCODEC_INNER_RACING)
 
+enum mtk_vcodec_dec_chip_name {
+	MTK_VDEC_INVAL = 0,
+	MTK_VDEC_MT8173 = 8173,
+	MTK_VDEC_MT8183 = 8183,
+	MTK_VDEC_MT8186 = 8186,
+	MTK_VDEC_MT8188 = 8188,
+	MTK_VDEC_MT8192 = 8192,
+	MTK_VDEC_MT8195 = 8195,
+};
+
 /*
  * enum mtk_vdec_format_types - Structure used to get supported
  *		  format types according to decoder capability
@@ -249,6 +259,8 @@ struct mtk_vcodec_dec_ctx {
  * @vdec_racing_info: record register value
  * @dec_racing_info_mutex: mutex lock used for inner racing mode
  * @dbgfs: debug log related information
+ *
+ * @chip_name: used to distinguish platforms and select the correct codec configuration values
  */
 struct mtk_vcodec_dec_dev {
 	struct v4l2_device v4l2_dev;
@@ -289,6 +301,8 @@ struct mtk_vcodec_dec_dev {
 	/* Protects access to vdec_racing_info data */
 	struct mutex dec_racing_info_mutex;
 	struct mtk_vcodec_dbgfs dbgfs;
+
+	enum mtk_vcodec_dec_chip_name chip_name;
 };
 
 static inline struct mtk_vcodec_dec_ctx *fh_to_dec_ctx(struct v4l2_fh *fh)
-- 
2.18.0