[PATCH V6, 4/5] media: mtk-jpegenc: add jpeg encode worker interface
Ricardo Ribalda
ribalda at chromium.org
Fri Dec 3 07:29:19 PST 2021
kyrie.wu wrote:
> Add jpeg encoding worker to ensure that two HWs
> run in parallel in MT8195.
Have you considered using a semaphore initialized to two to arbitrate this?
>
> Signed-off-by: kyrie.wu <kyrie.wu at mediatek.com>
> ---
> V6: no change
> ---
> drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c | 180 +++++++++++++++++++---
> drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h | 11 ++
> drivers/media/platform/mtk-jpeg/mtk_jpeg_enc_hw.c | 17 ++
> 3 files changed, 188 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
> index da7eb84..80a6c1a 100644
> --- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
> +++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
> @@ -110,6 +110,9 @@ struct mtk_jpeg_src_buf {
> struct vb2_v4l2_buffer b;
> struct list_head list;
> struct mtk_jpeg_dec_param dec_param;
> +
> + struct mtk_jpeg_ctx *curr_ctx;
> + u32 frame_num;
> };
>
> static int debug;
> @@ -908,38 +911,148 @@ static int mtk_jpeg_set_dec_dst(struct mtk_jpeg_ctx *ctx,
> return 0;
> }
>
> -static void mtk_jpeg_enc_device_run(void *priv)
> +static int mtk_jpegenc_select_hw(struct mtk_jpeg_ctx *ctx)
> {
> - struct mtk_jpeg_ctx *ctx = priv;
> + struct mtk_jpegenc_comp_dev *comp_jpeg;
> struct mtk_jpeg_dev *jpeg = ctx->jpeg;
> - struct vb2_v4l2_buffer *src_buf, *dst_buf;
> + unsigned long flags;
> + int hw_id = -1;
> + int i;
> +
> + spin_lock_irqsave(&jpeg->hw_lock, flags);
> + for (i = 0; i < MTK_JPEGENC_HW_MAX; i++) {
> + comp_jpeg = jpeg->enc_hw_dev[i];
> + if (comp_jpeg->hw_state == MTK_JPEG_HW_IDLE) {
> + hw_id = i;
> + comp_jpeg->hw_state = MTK_JPEG_HW_BUSY;
> + break;
> + }
> + }
> + spin_unlock_irqrestore(&jpeg->hw_lock, flags);
> +
> + return hw_id;
> +}
> +
> +static int mtk_jpegenc_set_hw_param(struct mtk_jpeg_ctx *ctx,
> + int hw_id,
> + struct vb2_v4l2_buffer *src_buf,
> + struct vb2_v4l2_buffer *dst_buf)
> +{
> + struct mtk_jpegenc_comp_dev *jpeg = ctx->jpeg->enc_hw_dev[hw_id];
> +
> + jpeg->hw_param.curr_ctx = ctx;
> + jpeg->hw_param.src_buffer = src_buf;
> + jpeg->hw_param.dst_buffer = dst_buf;
> +
> + return 0;
> +}
> +
> +static int mtk_jpegenc_deselect_hw(struct mtk_jpeg_dev *jpeg,
> + int hw_id)
> +{
> + unsigned long flags;
> +
> + spin_lock_irqsave(&jpeg->hw_lock, flags);
> + jpeg->enc_hw_dev[hw_id]->hw_state = MTK_JPEG_HW_IDLE;
> + spin_unlock_irqrestore(&jpeg->hw_lock, flags);
> +
> + return 0;
> +}
> +
> +static void mtk_jpegenc_worker(struct work_struct *work)
> +{
> + struct mtk_jpegenc_comp_dev *comp_jpeg[MTK_JPEGENC_HW_MAX];
> enum vb2_buffer_state buf_state = VB2_BUF_STATE_ERROR;
> + struct mtk_jpeg_src_buf *jpeg_src_buf, *jpeg_dst_buf;
> + struct vb2_v4l2_buffer *src_buf, *dst_buf;
> + atomic_t *hw_rdy[MTK_JPEGENC_HW_MAX];
> + struct clk *jpegenc_clk;
> + int ret, i, hw_id = 0;
> unsigned long flags;
> - int ret;
>
> + struct mtk_jpeg_ctx *ctx = container_of(work,
> + struct mtk_jpeg_ctx,
> + jpeg_work);
> + struct mtk_jpeg_dev *jpeg = ctx->jpeg;
> +
> + for (i = 0; i < MTK_JPEGENC_HW_MAX; i++) {
> + comp_jpeg[i] = jpeg->enc_hw_dev[i];
> + hw_rdy[i] = &comp_jpeg[i]->hw_rdy;
> + }
> +
> +retry_select:
> + hw_id = mtk_jpegenc_select_hw(ctx);
> + if (hw_id < 0) {
> + ret = wait_event_interruptible(jpeg->enc_hw_wq,
> + (atomic_read(hw_rdy[0]) ||
> + atomic_read(hw_rdy[1])) > 0);
> + if (ret != 0) {
> + dev_err(jpeg->dev, "%s : %d, all HW are busy\n",
> + __func__, __LINE__);
> + v4l2_m2m_job_finish(jpeg->m2m_dev, ctx->fh.m2m_ctx);
> + return;
> + }
> +
> + goto retry_select;
> + }
> +
> + atomic_dec(&comp_jpeg[hw_id]->hw_rdy);
> src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
> + if (!src_buf) {
> + dev_err(jpeg->dev, "%s : %d, get src_buf fail !!!\n",
> + __func__, __LINE__);
> + goto getbuf_fail;
> + }
> +
> dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
> + if (!dst_buf) {
> + pr_info("%s : %d, get dst_buf fail !!!\n",
> + __func__, __LINE__);
> + goto getbuf_fail;
> + }
>
> - ret = pm_runtime_resume_and_get(jpeg->dev);
> - if (ret < 0)
> - goto enc_end;
> + jpeg_src_buf = mtk_jpeg_vb2_to_srcbuf(&src_buf->vb2_buf);
> + jpeg_dst_buf = mtk_jpeg_vb2_to_srcbuf(&dst_buf->vb2_buf);
> + jpeg_src_buf->curr_ctx = ctx;
> + jpeg_src_buf->frame_num = ctx->total_frame_num;
> + jpeg_dst_buf->curr_ctx = ctx;
> + jpeg_dst_buf->frame_num = ctx->total_frame_num;
> + ctx->total_frame_num++;
>
> - schedule_delayed_work(&jpeg->job_timeout_work,
> - msecs_to_jiffies(MTK_JPEG_HW_TIMEOUT_MSEC));
> + v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
> + v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
> + mtk_jpegenc_set_hw_param(ctx, hw_id, src_buf, dst_buf);
> + ret = pm_runtime_get_sync(comp_jpeg[hw_id]->pm.dev);
> + if (ret < 0) {
> + dev_err(jpeg->dev, "%s : %d, pm_runtime_get_sync fail !!!\n",
> + __func__, __LINE__);
> + goto enc_end;
> + }
>
> - spin_lock_irqsave(&jpeg->hw_lock, flags);
> + jpegenc_clk = comp_jpeg[hw_id]->pm.venc_clk.clk_info->jpegenc_clk;
> + ret = clk_prepare_enable(jpegenc_clk);
> + if (ret) {
> + dev_err(jpeg->dev, "%s : %d, jpegenc clk_prepare_enable fail\n",
> + __func__, __LINE__);
> + goto enc_end;
> + }
>
> - /*
> - * Resetting the hardware every frame is to ensure that all the
> - * registers are cleared. This is a hardware requirement.
> - */
> - mtk_jpeg_enc_reset(jpeg->reg_base);
> + schedule_delayed_work(&comp_jpeg[hw_id]->job_timeout_work,
> + msecs_to_jiffies(MTK_JPEG_HW_TIMEOUT_MSEC));
> +
> + spin_lock_irqsave(&comp_jpeg[hw_id]->hw_lock, flags);
> + mtk_jpeg_enc_reset(comp_jpeg[hw_id]->reg_base);
> + mtk_jpeg_set_enc_dst(ctx,
> + comp_jpeg[hw_id]->reg_base,
> + &dst_buf->vb2_buf);
> + mtk_jpeg_set_enc_src(ctx,
> + comp_jpeg[hw_id]->reg_base,
> + &src_buf->vb2_buf);
> + mtk_jpeg_set_enc_params(ctx, comp_jpeg[hw_id]->reg_base);
> + mtk_jpeg_enc_start(comp_jpeg[hw_id]->reg_base);
> + v4l2_m2m_job_finish(jpeg->m2m_dev, ctx->fh.m2m_ctx);
> + spin_unlock_irqrestore(&comp_jpeg[hw_id]->hw_lock, flags);
>
> - mtk_jpeg_set_enc_src(ctx, jpeg->reg_base, &src_buf->vb2_buf);
> - mtk_jpeg_set_enc_dst(ctx, jpeg->reg_base, &dst_buf->vb2_buf);
> - mtk_jpeg_set_enc_params(ctx, jpeg->reg_base);
> - mtk_jpeg_enc_start(jpeg->reg_base);
> - spin_unlock_irqrestore(&jpeg->hw_lock, flags);
> return;
>
> enc_end:
> @@ -947,9 +1060,20 @@ static void mtk_jpeg_enc_device_run(void *priv)
> v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
> v4l2_m2m_buf_done(src_buf, buf_state);
> v4l2_m2m_buf_done(dst_buf, buf_state);
> +getbuf_fail:
> + atomic_inc(&comp_jpeg[hw_id]->hw_rdy);
> + mtk_jpegenc_deselect_hw(jpeg, hw_id);
> v4l2_m2m_job_finish(jpeg->m2m_dev, ctx->fh.m2m_ctx);
> }
>
> +static void mtk_jpeg_enc_device_run(void *priv)
> +{
> + struct mtk_jpeg_ctx *ctx = priv;
> + struct mtk_jpeg_dev *jpeg = ctx->jpeg;
You are reusing the jpeg_work structure, so if you call multiple times
mtk_jpeg_enc_device_run(), before the old one is completed, you would
overwrite the old values. Is this what you want?
> +
> + queue_work(jpeg->workqueue, &ctx->jpeg_work);
> +}
> +
> static void mtk_jpeg_dec_device_run(void *priv)
> {
> struct mtk_jpeg_ctx *ctx = priv;
> @@ -1217,6 +1341,9 @@ static int mtk_jpeg_open(struct file *file)
> goto free;
> }
>
> + if (jpeg->variant->is_encoder)
> + INIT_WORK(&ctx->jpeg_work, mtk_jpegenc_worker);
> +
> v4l2_fh_init(&ctx->fh, vfd);
> file->private_data = &ctx->fh;
> v4l2_fh_add(&ctx->fh);
> @@ -1387,6 +1514,15 @@ static int mtk_jpeg_probe(struct platform_device *pdev)
> }
>
> pm_runtime_enable(&pdev->dev);
> + } else {
> + init_waitqueue_head(&jpeg->enc_hw_wq);
> + jpeg->workqueue = alloc_ordered_workqueue(MTK_JPEG_NAME,
> + WQ_MEM_RECLAIM | WQ_FREEZABLE);
> + if (!jpeg->workqueue) {
> + dev_err(&pdev->dev, "Failed to create jpeg workqueue!\n");
> + ret = -EINVAL;
> + goto err_alloc_workqueue;
> + }
> }
>
> ret = v4l2_device_register(&pdev->dev, &jpeg->v4l2_dev);
> @@ -1460,6 +1596,8 @@ static int mtk_jpeg_probe(struct platform_device *pdev)
>
> err_clk_init:
>
> +err_alloc_workqueue:
> +
> err_req_irq:
>
> return ret;
> @@ -1475,6 +1613,8 @@ static int mtk_jpeg_remove(struct platform_device *pdev)
> v4l2_m2m_release(jpeg->m2m_dev);
> v4l2_device_unregister(&jpeg->v4l2_dev);
> mtk_jpeg_clk_release(jpeg);
> + flush_workqueue(jpeg->workqueue);
> + destroy_workqueue(jpeg->workqueue);
>
> return 0;
> }
> diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h
> index baab305..4c669af 100644
> --- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h
> +++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h
> @@ -75,6 +75,11 @@ struct mtk_jpeg_variant {
> u32 cap_q_default_fourcc;
> };
>
> +enum mtk_jpeg_hw_state {
> + MTK_JPEG_HW_IDLE = 0,
> + MTK_JPEG_HW_BUSY = 1,
> +};
> +
> struct mtk_jpeg_hw_param {
> struct vb2_v4l2_buffer *src_buffer;
> struct vb2_v4l2_buffer *dst_buffer;
> @@ -130,6 +135,9 @@ struct mtk_jpegenc_comp_dev {
> int jpegenc_irq;
> struct delayed_work job_timeout_work;
> struct mtk_jpeg_hw_param hw_param;
> + atomic_t hw_rdy;
> + enum mtk_jpeg_hw_state hw_state;
> + spinlock_t hw_lock;
> };
>
> /**
> @@ -163,6 +171,7 @@ struct mtk_jpeg_dev {
>
> void __iomem *reg_encbase[MTK_JPEGENC_HW_MAX];
> struct mtk_jpegenc_comp_dev *enc_hw_dev[MTK_JPEGENC_HW_MAX];
> + wait_queue_head_t enc_hw_wq;
> };
>
> /**
> @@ -221,6 +230,8 @@ struct mtk_jpeg_ctx {
> u8 enc_quality;
> u8 restart_interval;
> struct v4l2_ctrl_handler ctrl_hdl;
> + struct work_struct jpeg_work;
> + u32 total_frame_num;
> };
>
> extern struct platform_driver mtk_jpegenc_hw_driver;
> diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_enc_hw.c b/drivers/media/platform/mtk-jpeg/mtk_jpeg_enc_hw.c
> index e62b875..244f9f7 100644
> --- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_enc_hw.c
> +++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_enc_hw.c
> @@ -190,6 +190,7 @@ static void mtk_jpegenc_timeout_work(struct work_struct *work)
> struct mtk_jpegenc_comp_dev *cjpeg =
> container_of(Pwork, struct mtk_jpegenc_comp_dev,
> job_timeout_work);
> + struct mtk_jpeg_dev *master_jpeg = cjpeg->master_dev;
> enum vb2_buffer_state buf_state = VB2_BUF_STATE_ERROR;
> struct vb2_v4l2_buffer *src_buf;
>
> @@ -198,6 +199,9 @@ static void mtk_jpegenc_timeout_work(struct work_struct *work)
> mtk_jpeg_enc_reset(cjpeg->reg_base);
> clk_disable_unprepare(cjpeg->pm.venc_clk.clk_info->jpegenc_clk);
> pm_runtime_put(cjpeg->pm.dev);
> + cjpeg->hw_state = MTK_JPEG_HW_IDLE;
> + atomic_inc(&cjpeg->hw_rdy);
> + wake_up(&master_jpeg->enc_hw_wq);
> v4l2_m2m_buf_done(src_buf, buf_state);
> }
>
> @@ -235,7 +239,17 @@ static irqreturn_t mtk_jpegenc_hw_irq_handler(int irq, void *priv)
> v4l2_m2m_buf_done(src_buf, buf_state);
> v4l2_m2m_buf_done(dst_buf, buf_state);
> v4l2_m2m_job_finish(master_jpeg->m2m_dev, ctx->fh.m2m_ctx);
> + clk_disable_unprepare(jpeg->pm.venc_clk.clk_info->jpegenc_clk);
> pm_runtime_put(ctx->jpeg->dev);
> + if (ctx->fh.m2m_ctx &&
> + (!list_empty(&ctx->fh.m2m_ctx->out_q_ctx.rdy_queue) ||
> + !list_empty(&ctx->fh.m2m_ctx->cap_q_ctx.rdy_queue))) {
> + queue_work(master_jpeg->workqueue, &ctx->jpeg_work);
> + }
> +
> + jpeg->hw_state = MTK_JPEG_HW_IDLE;
> + wake_up(&master_jpeg->enc_hw_wq);
> + atomic_inc(&jpeg->hw_rdy);
>
> return IRQ_HANDLED;
> }
> @@ -341,6 +355,9 @@ static int mtk_jpegenc_hw_probe(struct platform_device *pdev)
> return -ENOMEM;
>
> dev->plat_dev = pdev;
> + atomic_set(&dev->hw_rdy, 1U);
> + spin_lock_init(&dev->hw_lock);
> + dev->hw_state = MTK_JPEG_HW_IDLE;
>
> INIT_DELAYED_WORK(&dev->job_timeout_work,
> mtk_jpegenc_timeout_work);
> --
> 2.6.4
>
>
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