diff mbox series

[v2,3/7] media: mediatek: vcodec: Add a debugfs file to get different useful information

Message ID 20230322094617.19410-4-yunfei.dong@mediatek.com
State New
Headers
Series media: mediatek: vcodec: Add debugfs file for decode and encode |

Commit Message

Yunfei Dong (董云飞) March 22, 2023, 9:46 a.m. UTC 
  In oder to get each instance information according to test command, adding
one file node "vdec".

Can use echo command to set different string value as 'echo -picinfo > vdec'.

Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
---
 .../mediatek/vcodec/mtk_vcodec_dbgfs.c        | 64 +++++++++++++++++++
 .../mediatek/vcodec/mtk_vcodec_dbgfs.h        | 32 ++++++++++
 .../mediatek/vcodec/mtk_vcodec_dec_drv.c      |  2 +
 3 files changed, 98 insertions(+)

Comments

AngeloGioacchino Del Regno March 22, 2023, 12:12 p.m. UTC | #1 
Il 22/03/23 10:46, Yunfei Dong ha scritto:
> In oder to get each instance information according to test command, adding
> one file node "vdec".
> 
> Can use echo command to set different string value as 'echo -picinfo > vdec'.
> 
> Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
> ---
>   .../mediatek/vcodec/mtk_vcodec_dbgfs.c        | 64 +++++++++++++++++++
>   .../mediatek/vcodec/mtk_vcodec_dbgfs.h        | 32 ++++++++++
>   .../mediatek/vcodec/mtk_vcodec_dec_drv.c      |  2 +
>   3 files changed, 98 insertions(+)
> 

> diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.h b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.h
> index 5eec2211cbbe..47c0a986877d 100644
> --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.h
> +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.h
> @@ -8,19 +8,51 @@
>   #define __MTK_VCODEC_DBGFS_H__
>   
>   struct mtk_vcodec_dev;
> +struct mtk_vcodec_ctx;
> +
> +/**
> + * struct mtk_vcodec_dbgfs_inst  - debugfs informatiaoin for each inst

There's a typo: "information"

> + * @node: list node for each inst
> + * @vcodec_ctx: struct mtk_vcodec_ctx
> + * @inst_id: index of the context that the same with ctx->id
> + */
> +struct mtk_vcodec_dbgfs_inst {
> +	struct list_head node;
> +	struct mtk_vcodec_ctx *vcodec_ctx;
> +	int inst_id;
> +};
>   
>   /**
>    * struct mtk_vcodec_dbgfs  - dbgfs information
> + * @dbgfs_head: list head used to link each instance
>    * @vcodec_root: vcodec dbgfs entry
> + * @dbgfs_lock: dbgfs lock used to protect dbgfs_buf
> + * @dbgfs_buf: dbgfs buf used to store dbgfs cmd
> + * @inst_count: the count of total instance
>    */
>   struct mtk_vcodec_dbgfs {
> +	struct list_head dbgfs_head;
>   	struct dentry *vcodec_root;
> +	/* dbgfs lock used to protect dbgfs_buf */

This comment is duplicated, you're already documenting it in kerneldoc above! :-)

> +	struct mutex dbgfs_lock;
> +	char dbgfs_buf[1024];
> +	int inst_count;
>   };
>   

Regards,
Angelo
diff mbox series

Patch

diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.c
index b5093e4e4aa2..49f0891e4923 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.c
@@ -10,6 +10,64 @@ 
 #include "mtk_vcodec_drv.h"
 #include "mtk_vcodec_util.h"
 
+static ssize_t mtk_vdec_dbgfs_write(struct file *filp, const char __user *ubuf,
+				    size_t count, loff_t *ppos)
+{
+	struct mtk_vcodec_dev *vcodec_dev = filp->private_data;
+	struct mtk_vcodec_dbgfs *dbgfs = &vcodec_dev->dbgfs;
+	int len;
+
+	mutex_lock(&dbgfs->dbgfs_lock);
+	len = simple_write_to_buffer(dbgfs->dbgfs_buf, sizeof(dbgfs->dbgfs_buf) - 1,
+				     ppos, ubuf, count);
+	mutex_unlock(&dbgfs->dbgfs_lock);
+	if (len > 0)
+		return count;
+
+	return len;
+}
+
+static const struct file_operations vdec_fops = {
+	.open = simple_open,
+	.write = mtk_vdec_dbgfs_write,
+};
+
+void mtk_vcodec_dbgfs_create(struct mtk_vcodec_ctx *ctx)
+{
+	struct mtk_vcodec_dbgfs_inst *dbgfs_inst;
+	struct mtk_vcodec_dev *vcodec_dev = ctx->dev;
+
+	dbgfs_inst = kzalloc(sizeof(*dbgfs_inst), GFP_KERNEL);
+	if (!dbgfs_inst)
+		return;
+
+	list_add_tail(&dbgfs_inst->node, &vcodec_dev->dbgfs.dbgfs_head);
+
+	vcodec_dev->dbgfs.inst_count++;
+
+	dbgfs_inst->inst_id = ctx->id;
+	dbgfs_inst->vcodec_ctx = ctx;
+}
+EXPORT_SYMBOL_GPL(mtk_vcodec_dbgfs_create);
+
+void mtk_vcodec_dbgfs_remove(struct mtk_vcodec_dev *vcodec_dev, int ctx_id)
+{
+	struct mtk_vcodec_dbgfs_inst *dbgfs_inst;
+
+	list_for_each_entry(dbgfs_inst, &vcodec_dev->dbgfs.dbgfs_head, node) {
+		if (dbgfs_inst && dbgfs_inst->inst_id == ctx_id) {
+			vcodec_dev->dbgfs.inst_count--;
+			break;
+		}
+	}
+
+	if (dbgfs_inst) {
+		list_del(&dbgfs_inst->node);
+		kfree(dbgfs_inst);
+	}
+}
+EXPORT_SYMBOL_GPL(mtk_vcodec_dbgfs_remove);
+
 void mtk_vcodec_dbgfs_init(struct mtk_vcodec_dev *vcodec_dev)
 {
 	struct dentry *vcodec_root;
@@ -22,6 +80,12 @@  void mtk_vcodec_dbgfs_init(struct mtk_vcodec_dev *vcodec_dev)
 	vcodec_root = vcodec_dev->dbgfs.vcodec_root;
 	debugfs_create_x32("mtk_v4l2_dbg_level", 0644, vcodec_root, &mtk_v4l2_dbg_level);
 	debugfs_create_x32("mtk_vcodec_dbg", 0644, vcodec_root, &mtk_vcodec_dbg);
+
+	vcodec_dev->dbgfs.inst_count = 0;
+
+	INIT_LIST_HEAD(&vcodec_dev->dbgfs.dbgfs_head);
+	debugfs_create_file("vdec", 0200, vcodec_root, vcodec_dev, &vdec_fops);
+	mutex_init(&vcodec_dev->dbgfs.dbgfs_lock);
 }
 EXPORT_SYMBOL_GPL(mtk_vcodec_dbgfs_init);
 
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.h b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.h
index 5eec2211cbbe..47c0a986877d 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.h
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.h
@@ -8,19 +8,51 @@ 
 #define __MTK_VCODEC_DBGFS_H__
 
 struct mtk_vcodec_dev;
+struct mtk_vcodec_ctx;
+
+/**
+ * struct mtk_vcodec_dbgfs_inst  - debugfs informatiaoin for each inst
+ * @node: list node for each inst
+ * @vcodec_ctx: struct mtk_vcodec_ctx
+ * @inst_id: index of the context that the same with ctx->id
+ */
+struct mtk_vcodec_dbgfs_inst {
+	struct list_head node;
+	struct mtk_vcodec_ctx *vcodec_ctx;
+	int inst_id;
+};
 
 /**
  * struct mtk_vcodec_dbgfs  - dbgfs information
+ * @dbgfs_head: list head used to link each instance
  * @vcodec_root: vcodec dbgfs entry
+ * @dbgfs_lock: dbgfs lock used to protect dbgfs_buf
+ * @dbgfs_buf: dbgfs buf used to store dbgfs cmd
+ * @inst_count: the count of total instance
  */
 struct mtk_vcodec_dbgfs {
+	struct list_head dbgfs_head;
 	struct dentry *vcodec_root;
+	/* dbgfs lock used to protect dbgfs_buf */
+	struct mutex dbgfs_lock;
+	char dbgfs_buf[1024];
+	int inst_count;
 };
 
 #if defined(CONFIG_DEBUG_FS)
+void mtk_vcodec_dbgfs_create(struct mtk_vcodec_ctx *ctx);
+void mtk_vcodec_dbgfs_remove(struct mtk_vcodec_dev *vcodec_dev, int ctx_id);
 void mtk_vcodec_dbgfs_init(struct mtk_vcodec_dev *vcodec_dev);
 void mtk_vcodec_dbgfs_deinit(struct mtk_vcodec_dev *vcodec_dev);
 #else
+static inline void mtk_vcodec_dbgfs_create(struct mtk_vcodec_ctx *ctx)
+{
+}
+
+static inline void mtk_vcodec_dbgfs_remove(struct mtk_vcodec_dev *vcodec_dev, int ctx_id)
+{
+}
+
 static inline void mtk_vcodec_dbgfs_init(struct mtk_vcodec_dev *vcodec_dev)
 {
 }
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
index de29b1fb0436..8c2443a18f5e 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
@@ -215,6 +215,7 @@  static int fops_vcodec_open(struct file *file)
 	ctx->dev->vdec_pdata->init_vdec_params(ctx);
 
 	list_add(&ctx->list, &dev->ctx_list);
+	mtk_vcodec_dbgfs_create(ctx);
 
 	mutex_unlock(&dev->dev_mutex);
 	mtk_v4l2_debug(0, "%s decoder [%d]", dev_name(&dev->plat_dev->dev),
@@ -256,6 +257,7 @@  static int fops_vcodec_release(struct file *file)
 	v4l2_fh_exit(&ctx->fh);
 	v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
 
+	mtk_vcodec_dbgfs_remove(dev, ctx->id);
 	list_del_init(&ctx->list);
 	kfree(ctx);
 	mutex_unlock(&dev->dev_mutex);