media: amphion: lock and check m2m_ctx in event handler

driver needs to cancel vpu before releasing the vpu instance,
so call v4l2_m2m_ctx_release() first,
to handle the redundant event triggered after m2m_ctx is released.

lock and check m2m_ctx in the event handler.

Fixes: 3cd084519c6f ("media: amphion: add vpu v4l2 m2m support")
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>

diff --git a/drivers/media/platform/amphion/vpu_msgs.c b/drivers/media/platform/amphion/vpu_msgs.c
index d8247f3..92672a8 100644 (file)
--- a/drivers/media/platform/amphion/vpu_msgs.c
+++ b/drivers/media/platform/amphion/vpu_msgs.c
@@ -43,6 +43,7 @@ static void vpu_session_handle_mem_request(struct vpu_inst *inst, struct vpu_rpc
                  req_data.ref_frame_num,
                  req_data.act_buf_size,
                  req_data.act_buf_num);
+       vpu_inst_lock(inst);
        call_void_vop(inst, mem_request,
                      req_data.enc_frame_size,
                      req_data.enc_frame_num,
@@ -50,6 +51,7 @@ static void vpu_session_handle_mem_request(struct vpu_inst *inst, struct vpu_rpc
                      req_data.ref_frame_num,
                      req_data.act_buf_size,
                      req_data.act_buf_num);
+       vpu_inst_unlock(inst);
 }
 
 static void vpu_session_handle_stop_done(struct vpu_inst *inst, struct vpu_rpc_event *pkt)

diff --git a/drivers/media/platform/amphion/vpu_v4l2.c b/drivers/media/platform/amphion/vpu_v4l2.c
index 33aaa86..6773b88 100644 (file)
--- a/drivers/media/platform/amphion/vpu_v4l2.c
+++ b/drivers/media/platform/amphion/vpu_v4l2.c
@@ -327,8 +327,12 @@ int vpu_process_capture_buffer(struct vpu_inst *inst)
 
 struct vb2_v4l2_buffer *vpu_next_src_buf(struct vpu_inst *inst)
 {
-       struct vb2_v4l2_buffer *src_buf = v4l2_m2m_next_src_buf(inst->fh.m2m_ctx);
+       struct vb2_v4l2_buffer *src_buf = NULL;
 
+       if (!inst->fh.m2m_ctx)
+               return NULL;
+
+       src_buf = v4l2_m2m_next_src_buf(inst->fh.m2m_ctx);
        if (!src_buf || vpu_get_buffer_state(src_buf) == VPU_BUF_STATE_IDLE)
                return NULL;
 
@@ -351,7 +355,7 @@ void vpu_skip_frame(struct vpu_inst *inst, int count)
        enum vb2_buffer_state state;
        int i = 0;
 
-       if (count <= 0)
+       if (count <= 0 || !inst->fh.m2m_ctx)
                return;
 
        while (i < count) {