media: mediatek: vcodec: Use vb2_find_buffer

Use the newly introduced vb2_find_buffer API to get a vb2_buffer
given a buffer timestamp.

Cc: Tiffany Lin <[e-mail]>
Cc: Andrew-CT Chen <[e-mail]>
Cc: Yunfei Dong <[e-mail]>
Signed-off-by: Ezequiel Garcia <[e-mail]>
Acked-by: Tomasz Figa <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_common.c

···
 	struct vb2_queue *vq;
 	struct vb2_buffer *vb;
 	struct vb2_v4l2_buffer *vb2_v4l2;
-	int index, vb2_index;
+	int index;
 
 	vq = v4l2_m2m_get_vq(ctx->m2m_ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
 
···
 			continue;
 		}
 
-		vb2_index = vb2_find_timestamp(vq, dpb->reference_ts, 0);
-		if (vb2_index < 0) {
+		vb = vb2_find_buffer(vq, dpb->reference_ts);
+		if (!vb) {
 			dev_err(&ctx->dev->plat_dev->dev,
 				"Reference invalid: dpb_index(%d) reference_ts(%lld)",
 				index, dpb->reference_ts);
···
 		else
 			h264_dpb_info[index].reference_flag = 2;
 
-		vb = vq->bufs[vb2_index];
 		vb2_v4l2 = container_of(vb, struct vb2_v4l2_buffer, vb2_buf);
 		h264_dpb_info[index].field = vb2_v4l2->field;
 

drivers/media/platform/mediatek/vcodec/vdec/vdec_vp8_req_if.c

···
 	struct vb2_queue *vq;
 	struct vb2_buffer *vb;
 	u64 referenct_ts;
-	int index, vb2_index;
+	int index;
 
 	frame_header = vdec_vp8_slice_get_ctrl_ptr(inst->ctx, V4L2_CID_STATELESS_VP8_FRAME);
 	if (IS_ERR(frame_header))
···
 	vq = v4l2_m2m_get_vq(ctx->m2m_ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
 	for (index = 0; index < 3; index++) {
 		referenct_ts = vdec_vp8_slice_get_ref_by_ts(frame_header, index);
-		vb2_index = vb2_find_timestamp(vq, referenct_ts, 0);
-		if (vb2_index < 0) {
+		vb = vb2_find_buffer(vq, referenct_ts);
+		if (!vb) {
 			if (!V4L2_VP8_FRAME_IS_KEY_FRAME(frame_header))
 				mtk_vcodec_err(inst, "reference invalid: index(%d) ts(%lld)",
 					       index, referenct_ts);
···
 		}
 		inst->vsi->vp8_dpb_info[index].reference_flag = 1;
 
-		vb = vq->bufs[vb2_index];
 		inst->vsi->vp8_dpb_info[index].y_dma_addr =
 			vb2_dma_contig_plane_dma_addr(vb, 0);
 		if (ctx->q_data[MTK_Q_DATA_DST].fmt->num_planes == 2)

drivers/media/platform/mediatek/vcodec/vdec/vdec_vp9_req_lat_if.c

···
 	struct vdec_vp9_slice_reference *ref;
 	int plane;
 	int size;
-	int idx;
 	int w;
 	int h;
 	int i;
···
 	 */
 	for (i = 0; i < 3; i++) {
 		ref = &vsi->frame.ref[i];
-		idx = vb2_find_timestamp(vq, pfc->ref_idx[i], 0);
-		if (idx < 0) {
+		vb = vb2_find_buffer(vq, pfc->ref_idx[i]);
+		if (!vb) {
 			ref->frame_width = w;
 			ref->frame_height = h;
 			memset(&vsi->ref[i], 0, sizeof(vsi->ref[i]));
 		} else {
+			int idx = vb->index;
+
 			ref->frame_width = instance->dpb[idx].width;
 			ref->frame_height = instance->dpb[idx].height;
-			vb = vq->bufs[idx];
 			vsi->ref[i].y.dma_addr =
 				vb2_dma_contig_plane_dma_addr(vb, 0);
 			if (plane == 1)