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media: mediatek: vcodec: Add dbgfs help function

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

Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Yunfei Dong 2023-05-30 20:29:08 +08:00 committed by Mauro Carvalho Chehab
parent cc77021822
commit d78b9d6671
1 changed files with 23 additions and 1 deletions
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24
drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.c
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@ -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;