media: amphion: sync buffer status with firmware during abort

1. prevent to allocate buffer to firmware during abort
2. release buffer when clear the slots

Fixes: 6de8d628 ("media: amphion: add v4l2 m2m vpu decoder stateful driver")
Signed-off-by: Ming Qian <ming.qian@nxp.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/amphion/vdec.c

@@ -63,6 +63,7 @@ struct vdec_t {
 	bool is_source_changed;
 	u32 source_change;
 	u32 drain;
+	bool aborting;
 };
 
 static const struct vpu_format vdec_formats[] = {
@@ -948,6 +949,9 @@ static int vdec_response_frame(struct vpu_inst *inst, struct vb2_v4l2_buffer *vb
 	if (inst->state != VPU_CODEC_STATE_ACTIVE)
 		return -EINVAL;
 
+	if (vdec->aborting)
+		return -EINVAL;
+
 	if (!vdec->req_frame_count)
 		return -EINVAL;
 
@@ -1057,6 +1061,8 @@ static void vdec_clear_slots(struct vpu_inst *inst)
 		vpu_buf = vdec->slots[i];
 		vbuf = &vpu_buf->m2m_buf.vb;
 
+		vpu_trace(inst->dev, "clear slot %d\n", i);
+		vdec_response_fs_release(inst, i, vpu_buf->tag);
 		vdec_recycle_buffer(inst, vbuf);
 		vdec->slots[i]->state = VPU_BUF_STATE_IDLE;
 		vdec->slots[i] = NULL;
@@ -1318,6 +1324,8 @@ static void vdec_abort(struct vpu_inst *inst)
 	int ret;
 
 	vpu_trace(inst->dev, "[%d] state = %d\n", inst->id, inst->state);
+
+	vdec->aborting = true;
 	vpu_iface_add_scode(inst, SCODE_PADDING_ABORT);
 	vdec->params.end_flag = 1;
 	vpu_iface_set_decode_params(inst, &vdec->params, 1);
@@ -1341,6 +1349,7 @@ static void vdec_abort(struct vpu_inst *inst)
 	vdec->decoded_frame_count = 0;
 	vdec->display_frame_count = 0;
 	vdec->sequence = 0;
+	vdec->aborting = false;
 }
 
 static void vdec_stop(struct vpu_inst *inst, bool free)