Hi, Shu-hsiang:
On Wed, 2024-10-09 at 19:15 +0800, Shu-hsiang Yang wrote:
> Introduces the top media device driver for the MediaTek ISP7X CAMSYS.
> The driver maintains the camera system, including sub-device management,
> DMA operations, and integration with the V4L2 framework. It handles
> request stream data, buffer management, and MediaTek-specific features,
> and pipeline management, streaming control, error handling mechanism.
> Additionally, it aggregates sub-drivers for the camera interface, raw
> and yuv pipelines.
>
> Signed-off-by: Shu-hsiang Yang <Shu-hsiang.Yang@xxxxxxxxxxxx>
> ---
[snip]
> +struct mtk_cam_ctx *mtk_cam_start_ctx(struct mtk_cam_device *cam,
> + struct mtk_cam_video_device *node)
> +{
> + struct mtk_cam_ctx *ctx = node->ctx;
> + struct device *dev;
> + struct v4l2_subdev **target_sd;
> + int ret, i, is_first_ctx;
> + struct media_entity *entity = &node->vdev.entity;
> + struct media_graph graph;
> +
> + dev_info(cam->dev, "%s:ctx(%d): triggered by %s\n",
> + __func__, ctx->stream_id, entity->name);
> +
> + atomic_set(&ctx->enqueued_frame_seq_no, 0);
> + ctx->composed_frame_seq_no = 0;
> + ctx->dequeued_frame_seq_no = 0;
> + atomic_set(&ctx->running_s_data_cnt, 0);
> + init_completion(&ctx->session_complete);
> + init_completion(&ctx->m2m_complete);
> +
> + is_first_ctx = !cam->composer_cnt;
> + if (is_first_ctx) {
> + spin_lock(&cam->dma_processing_lock);
> + cam->dma_processing_count = 0;
> + spin_unlock(&cam->dma_processing_lock);
> +
> + spin_lock(&cam->running_job_lock);
> + cam->running_job_count = 0;
> + spin_unlock(&cam->running_job_lock);
> +
> + dev_info(cam->dev, "%s: power on camsys\n", __func__);
> + ret = pm_runtime_resume_and_get(cam->dev);
> + if (ret < 0) {
> + dev_info(cam->dev, "%s: power on camsys failed\n",
> + __func__);
> + return NULL;
> + }
> +
> + ret = isp_composer_init(cam);
> + if (ret)
> + goto fail_shutdown;
> +
> + /* To catch camsys exception and trigger dump */
> + if (cam->debug_fs)
> + cam->debug_fs->ops->exp_reinit(cam->debug_fs);
> + }
> + cam->composer_cnt++;
> + if (is_yuv_node(node->desc.id))
> + dev = cam->raw.yuvs[0];
> + else
> + dev = cam->raw.devs[0];
> +
> + ret = mtk_cam_working_buf_pool_init(ctx, dev);
> + if (ret) {
> + dev_info(cam->dev, "failed to reserve DMA memory:%d\n", ret);
> + goto fail_uninit_composer;
> + }
> +
> + kthread_init_worker(&ctx->sensor_worker);
> + ctx->sensor_worker_task = kthread_run(kthread_worker_fn,
> + &ctx->sensor_worker,
> + "sensor_worker-%d",
> + ctx->stream_id);
> + if (IS_ERR(ctx->sensor_worker_task)) {
> + dev_info(cam->dev,
> + "%s:ctx(%d): could not create sensor_worker_task\n",
> + __func__, ctx->stream_id);
> + goto fail_release_buffer_pool;
> + }
> +
> + sched_set_fifo(ctx->sensor_worker_task);
> +
> + ctx->composer_wq = alloc_ordered_workqueue(dev_name(cam->dev),
> + WQ_HIGHPRI | WQ_FREEZABLE);
> + if (!ctx->composer_wq) {
> + dev_info(cam->dev, "failed to alloc composer workqueue\n");
> + goto fail_uninit_sensor_worker_task;
> + }
> +
> + ctx->frame_done_wq = alloc_ordered_workqueue(dev_name(cam->dev),
> + WQ_HIGHPRI | WQ_FREEZABLE);
> + if (!ctx->frame_done_wq) {
> + dev_info(cam->dev, "failed to alloc frame_done workqueue\n");
> + goto fail_uninit_composer_wq;
> + }
> +
> + ret = media_pipeline_start(&entity->pads[0], &ctx->pipeline);
> + if (ret) {
> + dev_warn(cam->dev,
> + "%s:pipe(%d):failed in media_pipeline_start:%d\n",
> + __func__, node->uid.pipe_id, ret);
> + goto fail_uninit_frame_done_wq;
> + }
> +
> + /* traverse to update used subdevs & number of nodes */
> + i = 0;
> + ret = media_graph_walk_init(&graph, entity->graph_obj.mdev);
> + if (ret)
> + goto fail_stop_pipeline;
> +
> + media_graph_walk_start(&graph, entity);
> + while ((entity = media_graph_walk_next(&graph))) {
> + dev_dbg(cam->dev, "linked entity %s\n", entity->name);
> +
> + target_sd = NULL;
> +
> + switch (entity->function) {
> + case MEDIA_ENT_F_IO_V4L:
> + ctx->enabled_node_cnt++;
> + break;
> + case MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER: /* pipeline */
> + if (i >= MAX_PIPES_PER_STREAM)
> + goto fail_stop_pipeline;
> + target_sd = ctx->pipe_subdevs + i;
> + i++;
> + break;
> + case MEDIA_ENT_F_VID_IF_BRIDGE: /* seninf */
> + target_sd = &ctx->seninf;
> + break;
> + case MEDIA_ENT_F_CAM_SENSOR:
This does not exist, so drop ctx->sensor.
Regards,
CK
> + target_sd = &ctx->sensor;
> + break;
> + default:
> + break;
> + }
> +
> + if (!target_sd)
> + continue;
> +
> + if (*target_sd) {
> + dev_info(cam->dev, "duplicated subdevs!!!\n");
> + goto fail_traverse_subdev;
> + }
> +
> + if (is_media_entity_v4l2_subdev(entity))
> + *target_sd = media_entity_to_v4l2_subdev(entity);
> + }
> + media_graph_walk_cleanup(&graph);
> +
> + return ctx;
> +
> +fail_traverse_subdev:
> + media_graph_walk_cleanup(&graph);
> +fail_stop_pipeline:
> + media_pipeline_stop(&entity->pads[0]);
> +fail_uninit_frame_done_wq:
> + destroy_workqueue(ctx->frame_done_wq);
> +fail_uninit_composer_wq:
> + destroy_workqueue(ctx->composer_wq);
> +fail_uninit_sensor_worker_task:
> + kthread_stop(ctx->sensor_worker_task);
> + ctx->sensor_worker_task = NULL;
> +fail_release_buffer_pool:
> + mtk_cam_working_buf_pool_release(ctx, dev);
> +fail_uninit_composer:
> + isp_composer_uninit(cam);
> + cam->composer_cnt--;
> +fail_shutdown:
> + if (is_first_ctx)
> + rproc_shutdown(cam->rproc_handle);
> +
> + return NULL;
> +}
> +
