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SubjectRe: [V10,5/7] mtk-jpegenc: add jpeg encode worker interface
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Il 27/06/22 04:56, Irui Wang ha scritto:
> From: kyrie wu <kyrie.wu@mediatek.com>
>
> Add jpeg encoding worker to ensure that two HWs
> run in parallel in MT8195.
>
> Signed-off-by: kyrie wu <kyrie.wu@mediatek.com>
> ---
> .../platform/mediatek/jpeg/mtk_jpeg_core.c | 208 ++++++++++++++++--
> .../platform/mediatek/jpeg/mtk_jpeg_core.h | 30 ++-
> .../platform/mediatek/jpeg/mtk_jpeg_enc_hw.c | 39 +++-
> 3 files changed, 240 insertions(+), 37 deletions(-)
>
> diff --git a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
> index 0c5c85a112ca..544673a527a0 100644
> --- a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
> +++ b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c

..snip..

> @@ -946,9 +1050,58 @@ 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(&jpeg->enchw_rdy);
> + mtk_jpegenc_put_hw(jpeg, hw_id);
> v4l2_m2m_job_finish(jpeg->m2m_dev, ctx->fh.m2m_ctx);
> }
>
> +static void mtk_jpeg_enc_device_run(void *priv)
> +{

That's not really the best thing to do here... if we're managing multi-core
hardware, this function would be a one-liner and we would never see variable
jpeg->is_jpgenc_multihw changing during runtime.

At this point, we can reduce checks and improve human readability by simply
having two separated functions for single-core vs multi-core...

static void mtk_jpeg_singlecore_enc_dev_run(void *priv) { .... blah .... }

and

static void mtk_jpeg_multicore_enc_dev_run(void *priv)
{
struct mtk_jpeg_ctx *ctx = priv;

queue_work(ctx->jpeg->workqueue, &ctx->jpeg_work);
}

Also because we're defining `.m2m_ops` into mt8195_jpegenc_drvdata, so it's
going to be as trivial as defining a new m2m_ops for it:

static const struct v4l2_m2m_ops mtk_jpeg_multicore_enc_m2m_ops = {

.device_run = mtk_jpeg_multicore_enc_dev_run,

};

Please fix that :-)

> + struct mtk_jpeg_ctx *ctx = priv;
> + struct mtk_jpeg_dev *jpeg = ctx->jpeg;
> + struct vb2_v4l2_buffer *src_buf, *dst_buf;
> + enum vb2_buffer_state buf_state = VB2_BUF_STATE_ERROR;
> + unsigned long flags;
> + int ret;
> +
> + if (!jpeg->is_jpgenc_multihw) {
> + src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
> + dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
> +
> + ret = pm_runtime_resume_and_get(jpeg->dev);
> + if (ret < 0)
> + goto enc_end;
> +
> + schedule_delayed_work(&jpeg->job_timeout_work,
> + msecs_to_jiffies(MTK_JPEG_HW_TIMEOUT_MSEC));
> +
> + spin_lock_irqsave(&jpeg->hw_lock, flags);
> +
> + /*
> + * 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);
> +
> + 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:
> + v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
> + 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);
> + v4l2_m2m_job_finish(jpeg->m2m_dev, ctx->fh.m2m_ctx);
> + } else {
> + queue_work(jpeg->workqueue, &ctx->jpeg_work);
> + }
> +}
> +
> static void mtk_jpeg_dec_device_run(void *priv)
> {
> struct mtk_jpeg_ctx *ctx = priv;
> @@ -1211,6 +1364,9 @@ static int mtk_jpeg_open(struct file *file)
> goto free;
> }
>
> + if (jpeg->is_jpgenc_multihw)
> + INIT_WORK(&ctx->jpeg_work, mtk_jpegenc_worker);
> +
> v4l2_fh_init(&ctx->fh, vfd);
> file->private_data = &ctx->fh;
> v4l2_fh_add(&ctx->fh);
> @@ -1355,6 +1511,18 @@ static int mtk_jpeg_probe(struct platform_device *pdev)
> dev_err(&pdev->dev, "Failed to init clk\n");
> goto err_clk_init;
> }
> + } else {
> + if (of_property_read_bool(pdev->dev.of_node,
> + "mediatek,jpegenc-multi-core")) {

This check is redundant (and will be wrong in the jpegdec series): you're entering
this branch only `if (jpeg->is_jpgenc_multihw)`, and this is initialized a little
earlier when reading the very same devicetree property.

So, for this series, remove the redundant check; for the jpegdec series, don't
recheck with of_property_read_bool, but check for `if (jpeg->is_jpgenc_multihw)`
and then theck for `if (jpeg->is_jpgdec_multihw)`.

> + init_waitqueue_head(&jpeg->enc_hw_wq);
> + jpeg->workqueue = alloc_ordered_workqueue(MTK_JPEG_NAME,
> + WQ_MEM_RECLAIM
> + | WQ_FREEZABLE);
> + if (!jpeg->workqueue) {
> + ret = -EINVAL;
> + goto err_alloc_workqueue;
> + }
> + }
> }
>
> ret = v4l2_device_register(&pdev->dev, &jpeg->v4l2_dev);
> @@ -1423,6 +1591,8 @@ static int mtk_jpeg_probe(struct platform_device *pdev)
>
> err_clk_init:
>
> +err_alloc_workqueue:
> +

You aren't doing anything at all here, so this label is not required. Remove it.

> err_req_irq:
>
> return ret;
> diff --git a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.h b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.h
> index 55719bd1b0fb..2fc20c6e06f4 100644
> --- a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.h
> +++ b/drivers/media/platform/mediatek/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;
> @@ -97,12 +102,17 @@ struct mtk_jpegenc_clk {
>
> /**
> * struct mtk_jpegenc_comp_dev - JPEG COREX abstraction
> - * @dev: JPEG device
> - * @plat_dev: platform device data
> - * @reg_base: JPEG registers mapping
> - * @master_dev: mtk_jpeg_dev device
> - * @pm: mtk_jpegenc_pm
> - * @jpegenc_irq: jpeg encode irq num
> + * @dev: JPEG device
> + * @plat_dev: platform device data
> + * @reg_base: JPEG registers mapping
> + * @master_dev: mtk_jpeg_dev device
> + * @venc_clk: mtk_jpegenc_clk
> + * @jpegenc_irq: jpeg encode irq num
> + * @job_timeout_work: handle jpeg encode work
> + * @hw_param: record hw param
> + * @hw_rdy: record hw ready
> + * @hw_state: record hw state
> + * @hw_lock: spinlock protecting the hw device resource
> */
> struct mtk_jpegenc_comp_dev {
> struct device *dev;
> @@ -114,6 +124,9 @@ struct mtk_jpegenc_comp_dev {
> int hw_id;
> struct delayed_work job_timeout_work;
> struct mtk_jpeg_hw_param hw_param;
> + enum mtk_jpeg_hw_state hw_state;
> + //spinlock protecting the hw device resource
> + spinlock_t hw_lock;
> };
>
> /**
> @@ -146,6 +159,8 @@ struct mtk_jpeg_dev {
> void __iomem *reg_encbase[MTK_JPEGENC_HW_MAX];
> struct mtk_jpegenc_comp_dev *enc_hw_dev[MTK_JPEGENC_HW_MAX];
> bool is_jpgenc_multihw;
> + wait_queue_head_t enc_hw_wq;
> + atomic_t enchw_rdy;
> };
>
> /**
> @@ -204,6 +219,9 @@ 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;
> };
>
> #endif /* _MTK_JPEG_CORE_H */
> diff --git a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_enc_hw.c b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_enc_hw.c
> index bea62013ce7d..8e1840137c34 100644
> --- a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_enc_hw.c
> +++ b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_enc_hw.c
> @@ -192,6 +192,7 @@ static void mtk_jpegenc_timeout_work(struct work_struct *work)
> container_of(dly_work,
> 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, *dst_buf;
>
> @@ -202,6 +203,9 @@ static void mtk_jpegenc_timeout_work(struct work_struct *work)
> mtk_jpeg_enc_reset(cjpeg->reg_base);
> clk_disable_unprepare(cjpeg->venc_clk.clks->clk);
> pm_runtime_put(cjpeg->dev);
> + cjpeg->hw_state = MTK_JPEG_HW_IDLE;
> + atomic_inc(&master_jpeg->enchw_rdy);
> + wake_up(&master_jpeg->enc_hw_wq);
> v4l2_m2m_buf_done(src_buf, buf_state);
> }
>
> @@ -218,30 +222,37 @@ static irqreturn_t mtk_jpegenc_hw_irq_handler(int irq, void *priv)
>
> cancel_delayed_work(&jpeg->job_timeout_work);
>
> + ctx = jpeg->hw_param.curr_ctx;
> + src_buf = jpeg->hw_param.src_buffer;
> + dst_buf = jpeg->hw_param.dst_buffer;
> + v4l2_m2m_buf_copy_metadata(src_buf, dst_buf, true);
> +
> irq_status = readl(jpeg->reg_base + JPEG_ENC_INT_STS) &
> JPEG_ENC_INT_STATUS_MASK_ALLIRQ;
> if (irq_status)
> writel(0, jpeg->reg_base + JPEG_ENC_INT_STS);
> - if (!(irq_status & JPEG_ENC_INT_STATUS_DONE))
> - return IRQ_NONE;
> -
> - ctx = v4l2_m2m_get_curr_priv(master_jpeg->m2m_dev);
> - if (!ctx) {
> - v4l2_err(&master_jpeg->v4l2_dev, "Context is NULL\n");
> - return IRQ_HANDLED;
> + if (!(irq_status & JPEG_ENC_INT_STATUS_DONE)) {
> + dev_err(jpeg->dev, " Not JPEG_ENC_INT_STATUS_DONE\n");

Please be more descriptive in error messages. Also, should this really be
a dev_err?!?

> + goto irq_handled;
> }
>
> - src_buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
> - dst_buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
> - v4l2_m2m_buf_copy_metadata(src_buf, dst_buf, true);
> -
> result_size = mtk_jpeg_enc_get_file_size(jpeg->reg_base);
> vb2_set_plane_payload(&dst_buf->vb2_buf, 0, result_size);
> +
> +irq_handled:
> buf_state = VB2_BUF_STATE_DONE;
> 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);
> pm_runtime_put(ctx->jpeg->dev);
> + clk_disable_unprepare(jpeg->venc_clk.clks->clk);
> + if (!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(&master_jpeg->enchw_rdy);
>
> return IRQ_HANDLED;
> }
> @@ -294,6 +305,10 @@ static int mtk_jpegenc_hw_probe(struct platform_device *pdev)
> dev->plat_dev = pdev;
> dev->dev = &pdev->dev;
>
> + atomic_set(&master_dev->enchw_rdy, MTK_JPEGENC_HW_MAX);
> + spin_lock_init(&dev->hw_lock);
> + dev->hw_state = MTK_JPEG_HW_IDLE;
> +
> INIT_DELAYED_WORK(&dev->job_timeout_work,
> mtk_jpegenc_timeout_work);
>


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