[PATCH v7, 11/15] media: mtk-vcodec: Add core thread

Yunfei Dong
2021-10-11T07:03:28Z

Core thread:
1. Gets lat_buf from core msg queue.
2. Proceeds core decode.
3. Puts the lat_buf back to lat msg queue.

Both H264 and VP9 rely on the core thread.

Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
---
.../platform/mtk-vcodec/mtk_vcodec_dec_drv.c | 12 +++++++
.../platform/mtk-vcodec/mtk_vcodec_drv.h | 7 ++++
.../platform/mtk-vcodec/vdec_msg_queue.c | 32 +++++++++++++++++++
.../platform/mtk-vcodec/vdec_msg_queue.h | 6 ++++
4 files changed, 57 insertions(+)

diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
index e21e0c4bcd86..de83e3b821b4 100644
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
@@ -364,6 +364,18 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
goto err_dec_pm;
}

+ if (VDEC_LAT_ARCH(dev->vdec_pdata->hw_arch)) {
+ vdec_msg_queue_init_ctx(&dev->msg_queue_core_ctx,
+ MTK_VDEC_CORE);
+ dev->kthread_core = kthread_run(vdec_msg_queue_core_thead, dev,
+ "mtk-%s", "core");
+ if (IS_ERR(dev->kthread_core)) {
+ dev_err(&pdev->dev, "Failed to create core thread");
+ ret = PTR_ERR(dev->kthread_core);
+ goto err_res;
+ }
+ }
+
for (i = 0; i < MTK_VDEC_HW_MAX; i++)
mutex_init(&dev->dec_mutex[i]);
spin_lock_init(&dev->irqlock);
diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h b/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
index 9d072c082f73..68a9b1a2d3b3 100644
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
@@ -27,6 +27,7 @@
#define MTK_VCODEC_MAX_PLANES 3
#define MTK_V4L2_BENCHMARK 0
#define WAIT_INTR_TIMEOUT_MS 1000
+#define VDEC_LAT_ARCH(hw_arch) ((hw_arch) >= MTK_VDEC_LAT_SINGLE_CORE)

/*
* enum mtk_hw_reg_idx - MTK hw register base index
@@ -466,6 +467,9 @@ struct mtk_vcodec_enc_pdata {
* @comp_dev: component hardware device
* @component_node: component node
*
+ * @kthread_core: thread used for core hardware decode
+ * @msg_queue_core_ctx: msg queue context used for core thread
+ *
* @hardware_bitmap: used to record hardware is ready or not
*/
struct mtk_vcodec_dev {
@@ -508,6 +512,9 @@ struct mtk_vcodec_dev {
void *comp_dev[MTK_VDEC_HW_MAX];
struct device_node *component_node[MTK_VDEC_HW_MAX];

+ struct task_struct *kthread_core;
+ struct vdec_msg_queue_ctx msg_queue_core_ctx;
+
DECLARE_BITMAP(hardware_bitmap, MTK_VDEC_HW_MAX);
};

diff --git a/drivers/media/platform/mtk-vcodec/vdec_msg_queue.c b/drivers/media/platform/mtk-vcodec/vdec_msg_queue.c
index d66ed98c79a9..665f571eab4b 100644
--- a/drivers/media/platform/mtk-vcodec/vdec_msg_queue.c
+++ b/drivers/media/platform/mtk-vcodec/vdec_msg_queue.c
@@ -256,3 +256,35 @@ void vdec_msg_queue_deinit(
kfree(lat_buf->private_data);
}
}
+
+int vdec_msg_queue_core_thead(void *data)
+{
+ struct mtk_vcodec_dev *dev = data;
+ struct vdec_lat_buf *lat_buf;
+ struct mtk_vcodec_ctx *ctx;
+
+ set_freezable();
+ for (;;) {
+ try_to_freeze();
+ if (kthread_should_stop())
+ break;
+
+ lat_buf = vdec_msg_queue_dqbuf(&dev->msg_queue_core_ctx);
+ if (!lat_buf)
+ continue;
+
+ ctx = lat_buf->ctx;
+ mtk_vcodec_set_curr_ctx(dev, ctx, MTK_VDEC_CORE);
+
+ if (!lat_buf->core_decode)
+ mtk_v4l2_err("Core decode callback func is NULL");
+ else
+ lat_buf->core_decode(lat_buf);
+
+ mtk_vcodec_set_curr_ctx(dev, NULL, MTK_VDEC_CORE);
+ vdec_msg_queue_qbuf(&ctx->msg_queue.lat_ctx, lat_buf);
+ }
+
+ mtk_v4l2_debug(3, "Video Capture Thread End");
+ return 0;
+}
diff --git a/drivers/media/platform/mtk-vcodec/vdec_msg_queue.h b/drivers/media/platform/mtk-vcodec/vdec_msg_queue.h
index 1905ce713592..b5745b144140 100644
--- a/drivers/media/platform/mtk-vcodec/vdec_msg_queue.h
+++ b/drivers/media/platform/mtk-vcodec/vdec_msg_queue.h
@@ -148,4 +148,10 @@ void vdec_msg_queue_deinit(
struct vdec_msg_queue *msg_queue,
struct mtk_vcodec_ctx *ctx);

+/**
+ * vdec_msg_queue_core_thead - used for core decoder.
+ * @data: private data used for each codec
+ */
+int vdec_msg_queue_core_thead(void *data);
+
#endif
--
2.25.1