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Subject: media: amphion: Report the average QP of current encoded frame
Author:  Ming Qian <ming.q...@nxp.com>
Date:    Mon May 6 17:49:18 2024 +0900

Report the average QP value of the current encoded frame via the
V4L2_CID_MPEG_VIDEO_AVERAGE_QP control, the value applies to the last
dequeued capture buffer.

Signed-off-by: Ming Qian <ming.q...@nxp.com>
Signed-off-by: Sebastian Fricke <sebastian.fri...@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>

 drivers/media/platform/amphion/venc.c        |  4 ++++
 drivers/media/platform/amphion/vpu.h         |  1 +
 drivers/media/platform/amphion/vpu_defs.h    |  1 +
 drivers/media/platform/amphion/vpu_v4l2.c    | 16 ++++++++++++++++
 drivers/media/platform/amphion/vpu_v4l2.h    |  1 +
 drivers/media/platform/amphion/vpu_windsor.c |  2 ++
 6 files changed, 25 insertions(+)

---

diff --git a/drivers/media/platform/amphion/venc.c 
b/drivers/media/platform/amphion/venc.c
index 16ed4d21519c..351b4edc8742 100644
--- a/drivers/media/platform/amphion/venc.c
+++ b/drivers/media/platform/amphion/venc.c
@@ -678,6 +678,9 @@ static int venc_ctrl_init(struct vpu_inst *inst)
                               ~(1 << 
V4L2_MPEG_VIDEO_HEADER_MODE_JOINED_WITH_1ST_FRAME),
                               
V4L2_MPEG_VIDEO_HEADER_MODE_JOINED_WITH_1ST_FRAME);
 
+       v4l2_ctrl_new_std(&inst->ctrl_handler, NULL,
+                         V4L2_CID_MPEG_VIDEO_AVERAGE_QP, 0, 51, 1, 0);
+
        if (inst->ctrl_handler.error) {
                ret = inst->ctrl_handler.error;
                v4l2_ctrl_handler_free(&inst->ctrl_handler);
@@ -817,6 +820,7 @@ static int venc_get_one_encoded_frame(struct vpu_inst *inst,
        vbuf->field = inst->cap_format.field;
        vbuf->flags |= frame->info.pic_type;
        vpu_set_buffer_state(vbuf, VPU_BUF_STATE_IDLE);
+       vpu_set_buffer_average_qp(vbuf, frame->info.average_qp);
        dev_dbg(inst->dev, "[%d][OUTPUT TS]%32lld\n", inst->id, 
vbuf->vb2_buf.timestamp);
        v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_DONE);
        venc->ready_count++;
diff --git a/drivers/media/platform/amphion/vpu.h 
b/drivers/media/platform/amphion/vpu.h
index 0246cf0ac3a8..22f0da26ccec 100644
--- a/drivers/media/platform/amphion/vpu.h
+++ b/drivers/media/platform/amphion/vpu.h
@@ -306,6 +306,7 @@ struct vpu_vb2_buffer {
        dma_addr_t chroma_v;
        unsigned int state;
        u32 tag;
+       u32 average_qp;
 };
 
 void vpu_writel(struct vpu_dev *vpu, u32 reg, u32 val);
diff --git a/drivers/media/platform/amphion/vpu_defs.h 
b/drivers/media/platform/amphion/vpu_defs.h
index 7320852668d6..428d988cf2f7 100644
--- a/drivers/media/platform/amphion/vpu_defs.h
+++ b/drivers/media/platform/amphion/vpu_defs.h
@@ -114,6 +114,7 @@ struct vpu_enc_pic_info {
        u32 wptr;
        u32 crc;
        s64 timestamp;
+       u32 average_qp;
 };
 
 struct vpu_dec_codec_info {
diff --git a/drivers/media/platform/amphion/vpu_v4l2.c 
b/drivers/media/platform/amphion/vpu_v4l2.c
index c88738e8fff7..83db57bc80b7 100644
--- a/drivers/media/platform/amphion/vpu_v4l2.c
+++ b/drivers/media/platform/amphion/vpu_v4l2.c
@@ -63,6 +63,13 @@ unsigned int vpu_get_buffer_state(struct vb2_v4l2_buffer 
*vbuf)
        return vpu_buf->state;
 }
 
+void vpu_set_buffer_average_qp(struct vb2_v4l2_buffer *vbuf, u32 qp)
+{
+       struct vpu_vb2_buffer *vpu_buf = to_vpu_vb2_buffer(vbuf);
+
+       vpu_buf->average_qp = qp;
+}
+
 void vpu_v4l2_set_error(struct vpu_inst *inst)
 {
        vpu_inst_lock(inst);
@@ -539,6 +546,15 @@ static void vpu_vb2_buf_finish(struct vb2_buffer *vb)
        struct vpu_inst *inst = vb2_get_drv_priv(vb->vb2_queue);
        struct vb2_queue *q = vb->vb2_queue;
 
+       if (V4L2_TYPE_IS_CAPTURE(vb->type)) {
+               struct vpu_vb2_buffer *vpu_buf = to_vpu_vb2_buffer(vbuf);
+               struct v4l2_ctrl *ctrl = v4l2_ctrl_find(&inst->ctrl_handler,
+                                                       
V4L2_CID_MPEG_VIDEO_AVERAGE_QP);
+
+               if (ctrl)
+                       v4l2_ctrl_s_ctrl(ctrl, vpu_buf->average_qp);
+       }
+
        if (vbuf->flags & V4L2_BUF_FLAG_LAST)
                vpu_notify_eos(inst);
 
diff --git a/drivers/media/platform/amphion/vpu_v4l2.h 
b/drivers/media/platform/amphion/vpu_v4l2.h
index 60f43056a7a2..56f2939fa84d 100644
--- a/drivers/media/platform/amphion/vpu_v4l2.h
+++ b/drivers/media/platform/amphion/vpu_v4l2.h
@@ -12,6 +12,7 @@ void vpu_inst_lock(struct vpu_inst *inst);
 void vpu_inst_unlock(struct vpu_inst *inst);
 void vpu_set_buffer_state(struct vb2_v4l2_buffer *vbuf, unsigned int state);
 unsigned int vpu_get_buffer_state(struct vb2_v4l2_buffer *vbuf);
+void vpu_set_buffer_average_qp(struct vb2_v4l2_buffer *vbuf, u32 qp);
 
 int vpu_v4l2_open(struct file *file, struct vpu_inst *inst);
 int vpu_v4l2_close(struct file *file);
diff --git a/drivers/media/platform/amphion/vpu_windsor.c 
b/drivers/media/platform/amphion/vpu_windsor.c
index 5f1101d7cf9e..e7d37aa4b826 100644
--- a/drivers/media/platform/amphion/vpu_windsor.c
+++ b/drivers/media/platform/amphion/vpu_windsor.c
@@ -499,6 +499,7 @@ struct windsor_pic_info {
        u32 proc_dacc_rng_wr_cnt;
        s32 tv_s;
        u32 tv_ns;
+       u32 average_qp;
 };
 
 u32 vpu_windsor_get_data_size(void)
@@ -734,6 +735,7 @@ static void vpu_windsor_unpack_pic_info(struct 
vpu_rpc_event *pkt, void *data)
        info->wptr = get_ptr(windsor->str_buff_wptr);
        info->crc = windsor->frame_crc;
        info->timestamp = timespec64_to_ns(&ts);
+       info->average_qp = windsor->average_qp;
 }
 
 static void vpu_windsor_unpack_mem_req(struct vpu_rpc_event *pkt, void *data)

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