Commit d78b9d66 authored by Yunfei Dong's avatar Yunfei Dong Committed by Mauro Carvalho Chehab
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media: mediatek: vcodec: Add dbgfs help function 



Getting dbgfs help information with command "echo -help > vdec"
or "echo > vdec".

Signed-off-by: default avatarYunfei Dong <yunfei.dong@mediatek.com>
Reviewed-by: default avatarAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@kernel.org>
parent cc770218

drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.c

+23 −1
Original line number Diff line number Diff line
@@ -52,6 +52,23 @@ static void mtk_vdec_dbgfs_get_format_type(struct mtk_vcodec_ctx *ctx, char *buf 
	*used += curr_len;

}



static void mtk_vdec_dbgfs_get_help(char *buf, int *used, int total)

{

	int curr_len;



	curr_len = snprintf(buf + *used, total - *used,

			    "help: (1: echo -'info' > vdec 2: cat vdec)\n");

	*used += curr_len;



	curr_len = snprintf(buf + *used, total - *used,

			    "\t-picinfo: get resolution\n");

	*used += curr_len;



	curr_len = snprintf(buf + *used, total - *used,

			    "\t-format: get output & capture queue format\n");

	*used += curr_len;

}



static ssize_t mtk_vdec_dbgfs_write(struct file *filp, const char __user *ubuf,

				    size_t count, loff_t *ppos)

{
@@ -83,6 +100,11 @@ static ssize_t mtk_vdec_dbgfs_read(struct file *filp, char __user *ubuf, 
	if (!buf)

		return -ENOMEM;



	if (strstr(dbgfs->dbgfs_buf, "-help") || dbgfs->buf_size == 1) {

		mtk_vdec_dbgfs_get_help(buf, &used_len, total_len);

		goto read_buffer;

	}



	if (strstr(dbgfs->dbgfs_buf, "-picinfo"))

		dbgfs_index[MTK_VDEC_DBGFS_PICINFO] = true;
@@ -109,7 +131,7 @@ static ssize_t mtk_vdec_dbgfs_read(struct file *filp, char __user *ubuf, 
			mtk_vdec_dbgfs_get_format_type(ctx, buf, &used_len, total_len);

	}

	mutex_unlock(&dbgfs->dbgfs_lock);



read_buffer:

	ret = simple_read_from_buffer(ubuf, count, ppos, buf, used_len);

	kfree(buf);

	return ret;