media: mediatek: vcodec: Get each context resolution information

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>
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>

diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.c
index b0ce117378b09de846d0faf97ca82f04925517db..4191a4032f25dd7a3635180eaa192fca045cc14b 100644 (file)
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.c
@@ -26,9 +26,51 @@ static ssize_t mtk_vdec_dbgfs_write(struct file *filp, const char __user *ubuf,
        return dbgfs->buf_size;
 }
 
+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 = 200 * (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);
+
+       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)

diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.h b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.h
index a563e656f42e57eea2755b34ec9695dbb6ac7839..30d956b7227fdea81f99c71c6873be509e7a5ace 100644 (file)
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.h
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dbgfs.h
@@ -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