Will store the string to temp buffer like "echo '-picinfo' > vdec" when
user want to get needed information.
Then getting debug information using command 'cat vdec' calling mtk_vdec_dbgfs_read
to analysis the temp buffer.
Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
---
.../mediatek/vcodec/mtk_vcodec_dbgfs.c | 44 +++++++++++++++++++
.../mediatek/vcodec/mtk_vcodec_dbgfs.h | 8 ++++
2 files changed, 52 insertions(+)
@@ -27,9 +27,53 @@ static ssize_t mtk_vdec_dbgfs_write(struct file *filp, const char __user *ubuf,
return len;
}
+static ssize_t mtk_vdec_dbgfs_read(struct file *filp, 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;
+ struct mtk_vcodec_dbgfs_inst *dbgfs_inst;
+ struct mtk_vcodec_ctx *ctx;
+ int total_len = 100 * (dbgfs->inst_count == 0 ? 1 : dbgfs->inst_count);
+ int used_len = 0, curr_len, ret;
+ bool dbgfs_index[MTK_VDEC_DBGFS_MAX] = {0};
+ char *buf = kmalloc(total_len, GFP_KERNEL);
+
+ if (!buf)
+ return -ENOMEM;
+
+ if (strstr(dbgfs->dbgfs_buf, "-picinfo"))
+ dbgfs_index[MTK_VDEC_DBGFS_PICINFO] = true;
+
+ mutex_lock(&dbgfs->dbgfs_lock);
+ list_for_each_entry(dbgfs_inst, &dbgfs->dbgfs_head, node) {
+ ctx = dbgfs_inst->vcodec_ctx;
+
+ curr_len = snprintf(buf + used_len, total_len - used_len,
+ "inst[%d]:\n ", ctx->id);
+ used_len += curr_len;
+
+ if (dbgfs_index[MTK_VDEC_DBGFS_PICINFO]) {
+ curr_len = snprintf(buf + used_len, total_len - used_len,
+ "\treal(%dx%d)=>align(%dx%d)\n",
+ ctx->picinfo.pic_w, ctx->picinfo.pic_h,
+ ctx->picinfo.buf_w, ctx->picinfo.buf_h);
+ used_len += curr_len;
+ }
+ }
+ mutex_unlock(&dbgfs->dbgfs_lock);
+
+ buf[used_len + 1] = '\0';
+ ret = simple_read_from_buffer(ubuf, count, ppos, buf, used_len);
+
+ kfree(buf);
+ return ret;
+}
+
static const struct file_operations vdec_fops = {
.open = simple_open,
.write = mtk_vdec_dbgfs_write,
+ .read = mtk_vdec_dbgfs_read,
};
void mtk_vcodec_dbgfs_create(struct mtk_vcodec_ctx *ctx)
@@ -10,6 +10,14 @@
struct mtk_vcodec_dev;
struct mtk_vcodec_ctx;
+/*
+ * enum mtk_vdec_dbgfs_log_index - used to get different debug information
+ */
+enum mtk_vdec_dbgfs_log_index {
+ MTK_VDEC_DBGFS_PICINFO,
+ MTK_VDEC_DBGFS_MAX,
+};
+
/**
* struct mtk_vcodec_dbgfs_inst - debugfs information for each inst
* @node: list node for each inst