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Subject[PATCH 3/4] venus: venc: Handle reset encoder state
Date
Redesign the encoder driver to be compliant with stateful encoder
spec - specifically adds handling of Reset state.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
---
drivers/media/platform/qcom/venus/core.h | 10 +-
drivers/media/platform/qcom/venus/venc.c | 242 ++++++++++++++++++-----
2 files changed, 197 insertions(+), 55 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
index 5c4693678e3f..294d5467a6a1 100644
--- a/drivers/media/platform/qcom/venus/core.h
+++ b/drivers/media/platform/qcom/venus/core.h
@@ -277,11 +277,11 @@ enum venus_dec_state {
};

enum venus_enc_state {
- VENUS_ENC_STATE_DEINIT = 0,
- VENUS_ENC_STATE_INIT = 1,
- VENUS_ENC_STATE_ENCODING = 2,
- VENUS_ENC_STATE_STOPPED = 3,
- VENUS_ENC_STATE_DRAIN = 4,
+ VENUS_ENC_STATE_INIT = 0,
+ VENUS_ENC_STATE_ENCODING = 1,
+ VENUS_ENC_STATE_STOPPED = 2,
+ VENUS_ENC_STATE_DRAIN = 3,
+ VENUS_ENC_STATE_RESET = 4,
};

struct venus_ts_metadata {
diff --git a/drivers/media/platform/qcom/venus/venc.c b/drivers/media/platform/qcom/venus/venc.c
index c6143b07914c..aa9255ddb0a5 100644
--- a/drivers/media/platform/qcom/venus/venc.c
+++ b/drivers/media/platform/qcom/venus/venc.c
@@ -565,6 +565,7 @@ static const struct v4l2_ioctl_ops venc_ioctl_ops = {
.vidioc_enum_frameintervals = venc_enum_frameintervals,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+ .vidioc_try_encoder_cmd = v4l2_m2m_ioctl_try_encoder_cmd,
.vidioc_encoder_cmd = venc_encoder_cmd,
};

@@ -850,6 +851,69 @@ static int venc_queue_setup(struct vb2_queue *q,
return ret;
}

+static void venc_release_session(struct venus_inst *inst)
+{
+ struct venus_core *core = inst->core;
+ int ret, abort = 0;
+
+ mutex_lock(&inst->lock);
+
+ if (inst->enc_state != VENUS_ENC_STATE_RESET)
+ dev_dbg(core->dev_enc, VDBGH "wrong state!\n");
+
+ ret = hfi_session_stop(inst);
+ abort |= (ret && ret != -EINVAL) ? 1 : 0;
+ ret = hfi_session_unload_res(inst);
+ abort |= (ret && ret != -EINVAL) ? 1 : 0;
+ ret = venus_helper_unregister_bufs(inst);
+ abort |= (ret && ret != -EINVAL) ? 1 : 0;
+ ret = venus_helper_intbufs_free(inst);
+ abort |= (ret && ret != -EINVAL) ? 1 : 0;
+ ret = hfi_session_deinit(inst);
+ abort |= (ret && ret != -EINVAL) ? 1 : 0;
+
+ if (inst->session_error)
+ abort = 1;
+
+ if (abort)
+ hfi_session_abort(inst);
+
+ venus_pm_load_scale(inst);
+ INIT_LIST_HEAD(&inst->registeredbufs);
+
+ inst->enc_state = VENUS_ENC_STATE_INIT;
+
+ mutex_unlock(&inst->lock);
+
+ venus_pm_release_core(inst);
+}
+
+static int venc_buf_init(struct vb2_buffer *vb)
+{
+ struct venus_inst *inst = vb2_get_drv_priv(vb->vb2_queue);
+
+ inst->buf_count++;
+
+ return venus_helper_vb2_buf_init(vb);
+}
+
+static void venc_buf_cleanup(struct vb2_buffer *vb)
+{
+ struct venus_inst *inst = vb2_get_drv_priv(vb->vb2_queue);
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct venus_buffer *buf = to_venus_buffer(vbuf);
+
+ mutex_lock(&inst->lock);
+ if (vb->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+ if (!list_empty(&inst->registeredbufs))
+ list_del_init(&buf->reg_list);
+ mutex_unlock(&inst->lock);
+
+ inst->buf_count--;
+ if (!inst->buf_count)
+ venc_release_session(inst);
+}
+
static int venc_verify_conf(struct venus_inst *inst)
{
enum hfi_version ver = inst->core->res->hfi_version;
@@ -881,61 +945,73 @@ static int venc_verify_conf(struct venus_inst *inst)
static int venc_start_streaming(struct vb2_queue *q, unsigned int count)
{
struct venus_inst *inst = vb2_get_drv_priv(q);
- int ret;
+ int ret = 0;

mutex_lock(&inst->lock);

- if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
+ if (V4L2_TYPE_IS_OUTPUT(q->type))
inst->streamon_out = 1;
else
inst->streamon_cap = 1;

- if (!(inst->streamon_out & inst->streamon_cap)) {
- mutex_unlock(&inst->lock);
- return 0;
- }
+ if (!(inst->streamon_out & inst->streamon_cap))
+ goto unlock;

- venus_helper_init_instance(inst);
+ if (inst->enc_state == VENUS_ENC_STATE_INIT) {
+ venus_helper_init_instance(inst);

- inst->sequence_cap = 0;
- inst->sequence_out = 0;
+ inst->sequence_cap = 0;
+ inst->sequence_out = 0;

- ret = venc_init_session(inst);
- if (ret)
- goto bufs_done;
+ ret = venc_init_session(inst);
+ if (ret)
+ goto bufs_done;

- ret = venus_pm_acquire_core(inst);
- if (ret)
- goto deinit_sess;
+ ret = venus_pm_acquire_core(inst);
+ if (ret)
+ goto deinit_sess;

- ret = venc_set_properties(inst);
- if (ret)
- goto deinit_sess;
+ ret = venc_verify_conf(inst);
+ if (ret)
+ goto deinit_sess;

- ret = venc_verify_conf(inst);
- if (ret)
- goto deinit_sess;
+ ret = venus_helper_set_num_bufs(inst, inst->num_input_bufs,
+ inst->num_output_bufs, 0);
+ if (ret)
+ goto deinit_sess;

- ret = venus_helper_set_num_bufs(inst, inst->num_input_bufs,
- inst->num_output_bufs, 0);
- if (ret)
- goto deinit_sess;
+ ret = venus_helper_vb2_start_streaming(inst);
+ if (ret)
+ goto deinit_sess;

- ret = venus_helper_vb2_start_streaming(inst);
- if (ret)
- goto deinit_sess;
+ venus_helper_process_initial_out_bufs(inst);
+ venus_helper_process_initial_cap_bufs(inst);

- inst->enc_state = VENUS_ENC_STATE_ENCODING;
+ inst->enc_state = VENUS_ENC_STATE_ENCODING;
+ } else if (inst->enc_state == VENUS_ENC_STATE_RESET &&
+ V4L2_TYPE_IS_CAPTURE(q->type)) {
+ ret = venus_helper_vb2_start_streaming(inst);
+ if (ret)
+ goto bufs_done;

- mutex_unlock(&inst->lock);
+ venus_helper_process_initial_out_bufs(inst);
+ venus_helper_process_initial_cap_bufs(inst);

- return 0;
+ inst->enc_state = VENUS_ENC_STATE_ENCODING;
+ } else if (inst->enc_state == VENUS_ENC_STATE_STOPPED &&
+ V4L2_TYPE_IS_OUTPUT(q->type)) {
+ inst->enc_state = VENUS_ENC_STATE_ENCODING;
+ }
+
+unlock:
+ mutex_unlock(&inst->lock);
+ return ret;

deinit_sess:
hfi_session_deinit(inst);
bufs_done:
venus_helper_buffers_done(inst, q->type, VB2_BUF_STATE_QUEUED);
- if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
+ if (V4L2_TYPE_IS_OUTPUT(q->type))
inst->streamon_out = 0;
else
inst->streamon_cap = 0;
@@ -943,33 +1019,97 @@ static int venc_start_streaming(struct vb2_queue *q, unsigned int count)
return ret;
}

-static void venc_vb2_buf_queue(struct vb2_buffer *vb)
+static int venc_stop_capture(struct venus_inst *inst)
+{
+ int ret;
+
+ switch (inst->enc_state) {
+ case VENUS_ENC_STATE_ENCODING:
+ case VENUS_ENC_STATE_DRAIN:
+ case VENUS_ENC_STATE_STOPPED:
+ inst->enc_state = VENUS_ENC_STATE_RESET;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = hfi_session_stop(inst);
+ ret |= hfi_session_unload_res(inst);
+ ret |= venus_helper_unregister_bufs(inst);
+ ret |= venus_helper_intbufs_free(inst);
+
+ return ret;
+}
+
+static int venc_stop_output(struct venus_inst *inst)
+{
+ switch (inst->enc_state) {
+ case VENUS_ENC_STATE_ENCODING:
+ inst->enc_state = VENUS_ENC_STATE_STOPPED;
+ break;
+ case VENUS_ENC_STATE_DRAIN:
+ inst->enc_state = VENUS_ENC_STATE_STOPPED;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void venc_stop_streaming(struct vb2_queue *q)
+{
+ struct venus_inst *inst = vb2_get_drv_priv(q);
+ int ret = -EINVAL;
+
+ mutex_lock(&inst->lock);
+
+ if (V4L2_TYPE_IS_OUTPUT(q->type))
+ ret = venc_stop_output(inst);
+ else
+ ret = venc_stop_capture(inst);
+
+ venus_helper_buffers_done(inst, q->type, VB2_BUF_STATE_ERROR);
+
+ if (ret)
+ goto unlock;
+
+ if (V4L2_TYPE_IS_OUTPUT(q->type))
+ inst->streamon_out = 0;
+ else
+ inst->streamon_cap = 0;
+
+unlock:
+ mutex_unlock(&inst->lock);
+}
+
+static void venc_buf_queue(struct vb2_buffer *vb)
{
struct venus_inst *inst = vb2_get_drv_priv(vb->vb2_queue);
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct v4l2_m2m_ctx *m2m_ctx = inst->m2m_ctx;

mutex_lock(&inst->lock);

- if (inst->enc_state == VENUS_ENC_STATE_STOPPED) {
- vbuf->sequence = inst->sequence_cap++;
- vbuf->field = V4L2_FIELD_NONE;
- vb2_set_plane_payload(vb, 0, 0);
- v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_DONE);
- mutex_unlock(&inst->lock);
- return;
- }
+ v4l2_m2m_buf_queue(m2m_ctx, vbuf);
+
+ if (!(inst->streamon_out && inst->streamon_cap))
+ goto unlock;
+
+ venus_helper_process_buf(vb);

- venus_helper_vb2_buf_queue(vb);
+unlock:
mutex_unlock(&inst->lock);
}

static const struct vb2_ops venc_vb2_ops = {
.queue_setup = venc_queue_setup,
- .buf_init = venus_helper_vb2_buf_init,
+ .buf_init = venc_buf_init,
+ .buf_cleanup = venc_buf_cleanup,
.buf_prepare = venus_helper_vb2_buf_prepare,
.start_streaming = venc_start_streaming,
- .stop_streaming = venus_helper_vb2_stop_streaming,
- .buf_queue = venc_vb2_buf_queue,
+ .stop_streaming = venc_stop_streaming,
+ .buf_queue = venc_buf_queue,
};

static void venc_buf_done(struct venus_inst *inst, unsigned int buf_type,
@@ -1025,8 +1165,12 @@ static const struct hfi_inst_ops venc_hfi_ops = {
.event_notify = venc_event_notify,
};

+static void venc_m2m_device_run(void *priv)
+{
+}
+
static const struct v4l2_m2m_ops venc_m2m_ops = {
- .device_run = venus_helper_m2m_device_run,
+ .device_run = venc_m2m_device_run,
.job_abort = venus_helper_m2m_job_abort,
};

@@ -1098,11 +1242,9 @@ static int venc_open(struct file *file)
inst->core = core;
inst->session_type = VIDC_SESSION_TYPE_ENC;
inst->clk_data.core_id = VIDC_CORE_ID_DEFAULT;
+ inst->enc_state = VENUS_ENC_STATE_INIT;
inst->core_acquired = false;

- if (inst->enc_state == VENUS_ENC_STATE_DEINIT)
- inst->enc_state = VENUS_ENC_STATE_INIT;
-
venus_helper_init_instance(inst);

ret = pm_runtime_get_sync(core->dev_enc);
@@ -1167,7 +1309,7 @@ static int venc_close(struct file *file)
mutex_destroy(&inst->lock);
v4l2_fh_del(&inst->fh);
v4l2_fh_exit(&inst->fh);
- inst->enc_state = VENUS_ENC_STATE_DEINIT;
+
pm_runtime_put_sync(inst->core->dev_enc);

kfree(inst);
--
2.17.1
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