Re: [RESEND PATCH v7 2/4] media: chips-media: wave5: Support runtime suspend/resume

From: Nicolas Dufresne
Date: Fri Sep 06 2024 - 13:08:33 EST

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Hi,

Le lundi 12 août 2024 à 16:08 +0900, Jackson.lee a écrit :
> Add support for runtime suspend/resume in the encoder and decoder. This is
> achieved by saving the VPU state and powering it off while the VPU idle.

If you don't, I'll edit to "while the VPU *is* idle".

regards,
Nicolas

>
> Signed-off-by: Jackson.lee <jackson.lee@xxxxxxxxxxxxxxx>
> Signed-off-by: Nas Chung <nas.chung@xxxxxxxxxxxxxxx>
> Reviewed-by: Nicolas Dufresne <nicolas.dufresne@xxxxxxxxxxxxx>
> ---
> .../platform/chips-media/wave5/wave5-helper.c | 13 -----
> .../platform/chips-media/wave5/wave5-hw.c | 4 +-
> .../chips-media/wave5/wave5-vpu-dec.c | 21 ++++++--
> .../chips-media/wave5/wave5-vpu-enc.c | 20 ++++++--
> .../platform/chips-media/wave5/wave5-vpu.c | 50 +++++++++++++++++++
> .../platform/chips-media/wave5/wave5-vpuapi.c | 33 ++++++++++--
> .../media/platform/chips-media/wave5/wave5.h | 3 ++
> 7 files changed, 118 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/media/platform/chips-media/wave5/wave5-helper.c b/drivers/media/platform/chips-media/wave5/wave5-helper.c
> index d60841c54a80..a20d84dbe3aa 100644
> --- a/drivers/media/platform/chips-media/wave5/wave5-helper.c
> +++ b/drivers/media/platform/chips-media/wave5/wave5-helper.c
> @@ -58,7 +58,6 @@ int wave5_vpu_release_device(struct file *filp,
> char *name)
> {
> struct vpu_instance *inst = wave5_to_vpu_inst(filp->private_data);
> - struct vpu_device *dev = inst->dev;
> int ret = 0;
>
> v4l2_m2m_ctx_release(inst->v4l2_fh.m2m_ctx);
> @@ -78,18 +77,6 @@ int wave5_vpu_release_device(struct file *filp,
> }
>
> wave5_cleanup_instance(inst);
> - if (dev->irq < 0) {
> - ret = mutex_lock_interruptible(&dev->dev_lock);
> - if (ret)
> - return ret;
> -
> - if (list_empty(&dev->instances)) {
> - dev_dbg(dev->dev, "Disabling the hrtimer\n");
> - hrtimer_cancel(&dev->hrtimer);
> - }
> -
> - mutex_unlock(&dev->dev_lock);
> - }
>
> return ret;
> }
> diff --git a/drivers/media/platform/chips-media/wave5/wave5-hw.c b/drivers/media/platform/chips-media/wave5/wave5-hw.c
> index 2a98bab446d0..c8a905994109 100644
> --- a/drivers/media/platform/chips-media/wave5/wave5-hw.c
> +++ b/drivers/media/platform/chips-media/wave5/wave5-hw.c
> @@ -1228,8 +1228,8 @@ int wave5_vpu_re_init(struct device *dev, u8 *fw, size_t size)
> return setup_wave5_properties(dev);
> }
>
> -static int wave5_vpu_sleep_wake(struct device *dev, bool i_sleep_wake, const uint16_t *code,
> - size_t size)
> +int wave5_vpu_sleep_wake(struct device *dev, bool i_sleep_wake, const uint16_t *code,
> + size_t size)
> {
> u32 reg_val;
> struct vpu_buf *common_vb;
> diff --git a/drivers/media/platform/chips-media/wave5/wave5-vpu-dec.c b/drivers/media/platform/chips-media/wave5/wave5-vpu-dec.c
> index 0c5c9a8de91f..698c83e3082e 100644
> --- a/drivers/media/platform/chips-media/wave5/wave5-vpu-dec.c
> +++ b/drivers/media/platform/chips-media/wave5/wave5-vpu-dec.c
> @@ -5,6 +5,7 @@
> * Copyright (C) 2021-2023 CHIPS&MEDIA INC
> */
>
> +#include <linux/pm_runtime.h>
> #include "wave5-helper.h"
>
> #define VPU_DEC_DEV_NAME "C&M Wave5 VPU decoder"
> @@ -518,6 +519,8 @@ static void wave5_vpu_dec_finish_decode(struct vpu_instance *inst)
> if (q_status.report_queue_count == 0 &&
> (q_status.instance_queue_count == 0 || dec_info.sequence_changed)) {
> dev_dbg(inst->dev->dev, "%s: finishing job.\n", __func__);
> + pm_runtime_mark_last_busy(inst->dev->dev);
> + pm_runtime_put_autosuspend(inst->dev->dev);
> v4l2_m2m_job_finish(inst->v4l2_m2m_dev, m2m_ctx);
> }
> }
> @@ -1398,6 +1401,7 @@ static int wave5_vpu_dec_start_streaming(struct vb2_queue *q, unsigned int count
> int ret = 0;
>
> dev_dbg(inst->dev->dev, "%s: type: %u\n", __func__, q->type);
> + pm_runtime_resume_and_get(inst->dev->dev);
>
> v4l2_m2m_update_start_streaming_state(m2m_ctx, q);
>
> @@ -1429,13 +1433,15 @@ static int wave5_vpu_dec_start_streaming(struct vb2_queue *q, unsigned int count
> if (ret)
> goto return_buffers;
> }
> -
> + pm_runtime_mark_last_busy(inst->dev->dev);
> + pm_runtime_put_autosuspend(inst->dev->dev);
> return ret;
>
> free_bitstream_vbuf:
> wave5_vdi_free_dma_memory(inst->dev, &inst->bitstream_vbuf);
> return_buffers:
> wave5_return_bufs(q, VB2_BUF_STATE_QUEUED);
> + pm_runtime_put_autosuspend(inst->dev->dev);
> return ret;
> }
>
> @@ -1521,6 +1527,7 @@ static void wave5_vpu_dec_stop_streaming(struct vb2_queue *q)
> bool check_cmd = TRUE;
>
> dev_dbg(inst->dev->dev, "%s: type: %u\n", __func__, q->type);
> + pm_runtime_resume_and_get(inst->dev->dev);
>
> while (check_cmd) {
> struct queue_status_info q_status;
> @@ -1544,6 +1551,9 @@ static void wave5_vpu_dec_stop_streaming(struct vb2_queue *q)
> streamoff_output(q);
> else
> streamoff_capture(q);
> +
> + pm_runtime_mark_last_busy(inst->dev->dev);
> + pm_runtime_put_autosuspend(inst->dev->dev);
> }
>
> static const struct vb2_ops wave5_vpu_dec_vb2_ops = {
> @@ -1630,7 +1640,7 @@ static void wave5_vpu_dec_device_run(void *priv)
> int ret = 0;
>
> dev_dbg(inst->dev->dev, "%s: Fill the ring buffer with new bitstream data", __func__);
> -
> + pm_runtime_resume_and_get(inst->dev->dev);
> ret = fill_ringbuffer(inst);
> if (ret) {
> dev_warn(inst->dev->dev, "Filling ring buffer failed\n");
> @@ -1713,6 +1723,8 @@ static void wave5_vpu_dec_device_run(void *priv)
>
> finish_job_and_return:
> dev_dbg(inst->dev->dev, "%s: leave and finish job", __func__);
> + pm_runtime_mark_last_busy(inst->dev->dev);
> + pm_runtime_put_autosuspend(inst->dev->dev);
> v4l2_m2m_job_finish(inst->v4l2_m2m_dev, m2m_ctx);
> }
>
> @@ -1879,9 +1891,8 @@ static int wave5_vpu_open_dec(struct file *filp)
> if (ret)
> goto cleanup_inst;
>
> - if (dev->irq < 0 && !hrtimer_active(&dev->hrtimer) && list_empty(&dev->instances))
> - hrtimer_start(&dev->hrtimer, ns_to_ktime(dev->vpu_poll_interval * NSEC_PER_MSEC),
> - HRTIMER_MODE_REL_PINNED);
> + if (list_empty(&dev->instances))
> + pm_runtime_use_autosuspend(inst->dev->dev);
>
> list_add_tail(&inst->list, &dev->instances);
>
> diff --git a/drivers/media/platform/chips-media/wave5/wave5-vpu-enc.c b/drivers/media/platform/chips-media/wave5/wave5-vpu-enc.c
> index b731decbfda6..985de0c293e2 100644
> --- a/drivers/media/platform/chips-media/wave5/wave5-vpu-enc.c
> +++ b/drivers/media/platform/chips-media/wave5/wave5-vpu-enc.c
> @@ -5,6 +5,7 @@
> * Copyright (C) 2021-2023 CHIPS&MEDIA INC
> */
>
> +#include <linux/pm_runtime.h>
> #include "wave5-helper.h"
>
> #define VPU_ENC_DEV_NAME "C&M Wave5 VPU encoder"
> @@ -1310,6 +1311,7 @@ static int wave5_vpu_enc_start_streaming(struct vb2_queue *q, unsigned int count
> struct v4l2_m2m_ctx *m2m_ctx = inst->v4l2_fh.m2m_ctx;
> int ret = 0;
>
> + pm_runtime_resume_and_get(inst->dev->dev);
> v4l2_m2m_update_start_streaming_state(m2m_ctx, q);
>
> if (inst->state == VPU_INST_STATE_NONE && q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
> @@ -1364,9 +1366,13 @@ static int wave5_vpu_enc_start_streaming(struct vb2_queue *q, unsigned int count
> if (ret)
> goto return_buffers;
>
> + pm_runtime_mark_last_busy(inst->dev->dev);
> + pm_runtime_put_autosuspend(inst->dev->dev);
> return 0;
> return_buffers:
> wave5_return_bufs(q, VB2_BUF_STATE_QUEUED);
> + pm_runtime_mark_last_busy(inst->dev->dev);
> + pm_runtime_put_autosuspend(inst->dev->dev);
> return ret;
> }
>
> @@ -1408,6 +1414,7 @@ static void wave5_vpu_enc_stop_streaming(struct vb2_queue *q)
> */
>
> dev_dbg(inst->dev->dev, "%s: type: %u\n", __func__, q->type);
> + pm_runtime_resume_and_get(inst->dev->dev);
>
> if (wave5_vpu_both_queues_are_streaming(inst))
> switch_state(inst, VPU_INST_STATE_STOP);
> @@ -1432,6 +1439,9 @@ static void wave5_vpu_enc_stop_streaming(struct vb2_queue *q)
> streamoff_output(inst, q);
> else
> streamoff_capture(inst, q);
> +
> + pm_runtime_mark_last_busy(inst->dev->dev);
> + pm_runtime_put_autosuspend(inst->dev->dev);
> }
>
> static const struct vb2_ops wave5_vpu_enc_vb2_ops = {
> @@ -1478,6 +1488,7 @@ static void wave5_vpu_enc_device_run(void *priv)
> u32 fail_res = 0;
> int ret = 0;
>
> + pm_runtime_resume_and_get(inst->dev->dev);
> switch (inst->state) {
> case VPU_INST_STATE_PIC_RUN:
> ret = start_encode(inst, &fail_res);
> @@ -1491,6 +1502,8 @@ static void wave5_vpu_enc_device_run(void *priv)
> break;
> }
> dev_dbg(inst->dev->dev, "%s: leave with active job", __func__);
> + pm_runtime_mark_last_busy(inst->dev->dev);
> + pm_runtime_put_autosuspend(inst->dev->dev);
> return;
> default:
> WARN(1, "Execution of a job in state %s is invalid.\n",
> @@ -1498,6 +1511,8 @@ static void wave5_vpu_enc_device_run(void *priv)
> break;
> }
> dev_dbg(inst->dev->dev, "%s: leave and finish job", __func__);
> + pm_runtime_mark_last_busy(inst->dev->dev);
> + pm_runtime_put_autosuspend(inst->dev->dev);
> v4l2_m2m_job_finish(inst->v4l2_m2m_dev, m2m_ctx);
> }
>
> @@ -1739,9 +1754,8 @@ static int wave5_vpu_open_enc(struct file *filp)
> if (ret)
> goto cleanup_inst;
>
> - if (dev->irq < 0 && !hrtimer_active(&dev->hrtimer) && list_empty(&dev->instances))
> - hrtimer_start(&dev->hrtimer, ns_to_ktime(dev->vpu_poll_interval * NSEC_PER_MSEC),
> - HRTIMER_MODE_REL_PINNED);
> + if (list_empty(&dev->instances))
> + pm_runtime_use_autosuspend(inst->dev->dev);
>
> list_add_tail(&inst->list, &dev->instances);
>
> diff --git a/drivers/media/platform/chips-media/wave5/wave5-vpu.c b/drivers/media/platform/chips-media/wave5/wave5-vpu.c
> index 7273254ecb03..41c4bf64f27d 100644
> --- a/drivers/media/platform/chips-media/wave5/wave5-vpu.c
> +++ b/drivers/media/platform/chips-media/wave5/wave5-vpu.c
> @@ -10,6 +10,7 @@
> #include <linux/clk.h>
> #include <linux/firmware.h>
> #include <linux/interrupt.h>
> +#include <linux/pm_runtime.h>
> #include <linux/reset.h>
> #include "wave5-vpu.h"
> #include "wave5-regdefine.h"
> @@ -153,6 +154,45 @@ static int wave5_vpu_load_firmware(struct device *dev, const char *fw_name,
> return 0;
> }
>
> +static __maybe_unused int wave5_pm_suspend(struct device *dev)
> +{
> + struct vpu_device *vpu = dev_get_drvdata(dev);
> +
> + if (pm_runtime_suspended(dev))
> + return 0;
> +
> + if (vpu->irq < 0)
> + hrtimer_cancel(&vpu->hrtimer);
> +
> + wave5_vpu_sleep_wake(dev, true, NULL, 0);
> + clk_bulk_disable_unprepare(vpu->num_clks, vpu->clks);
> +
> + return 0;
> +}
> +
> +static __maybe_unused int wave5_pm_resume(struct device *dev)
> +{
> + struct vpu_device *vpu = dev_get_drvdata(dev);
> + int ret = 0;
> +
> + wave5_vpu_sleep_wake(dev, false, NULL, 0);
> + ret = clk_bulk_prepare_enable(vpu->num_clks, vpu->clks);
> + if (ret) {
> + dev_err(dev, "Enabling clocks, fail: %d\n", ret);
> + return ret;
> + }
> +
> + if (vpu->irq < 0 && !hrtimer_active(&vpu->hrtimer))
> + hrtimer_start(&vpu->hrtimer, ns_to_ktime(vpu->vpu_poll_interval * NSEC_PER_MSEC),
> + HRTIMER_MODE_REL_PINNED);
> +
> + return ret;
> +}
> +
> +static const struct dev_pm_ops wave5_pm_ops = {
> + SET_RUNTIME_PM_OPS(wave5_pm_suspend, wave5_pm_resume, NULL)
> +};
> +
> static int wave5_vpu_probe(struct platform_device *pdev)
> {
> int ret;
> @@ -281,6 +321,12 @@ static int wave5_vpu_probe(struct platform_device *pdev)
> (match_data->flags & WAVE5_IS_DEC) ? "'DECODE'" : "");
> dev_info(&pdev->dev, "Product Code: 0x%x\n", dev->product_code);
> dev_info(&pdev->dev, "Firmware Revision: %u\n", fw_revision);
> +
> + pm_runtime_set_autosuspend_delay(&pdev->dev, 100);
> + pm_runtime_use_autosuspend(&pdev->dev);
> + pm_runtime_enable(&pdev->dev);
> + wave5_vpu_sleep_wake(&pdev->dev, true, NULL, 0);
> +
> return 0;
>
> err_enc_unreg:
> @@ -310,6 +356,9 @@ static void wave5_vpu_remove(struct platform_device *pdev)
> hrtimer_cancel(&dev->hrtimer);
> }
>
> + pm_runtime_put_sync(&pdev->dev);
> + pm_runtime_disable(&pdev->dev);
> +
> mutex_destroy(&dev->dev_lock);
> mutex_destroy(&dev->hw_lock);
> reset_control_assert(dev->resets);
> @@ -337,6 +386,7 @@ static struct platform_driver wave5_vpu_driver = {
> .driver = {
> .name = VPU_PLATFORM_DEVICE_NAME,
> .of_match_table = of_match_ptr(wave5_dt_ids),
> + .pm = &wave5_pm_ops,
> },
> .probe = wave5_vpu_probe,
> .remove_new = wave5_vpu_remove,
> diff --git a/drivers/media/platform/chips-media/wave5/wave5-vpuapi.c b/drivers/media/platform/chips-media/wave5/wave5-vpuapi.c
> index 1a3efb638dde..e16b990041c2 100644
> --- a/drivers/media/platform/chips-media/wave5/wave5-vpuapi.c
> +++ b/drivers/media/platform/chips-media/wave5/wave5-vpuapi.c
> @@ -6,6 +6,8 @@
> */
>
> #include <linux/bug.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/delay.h>
> #include "wave5-vpuapi.h"
> #include "wave5-regdefine.h"
> #include "wave5.h"
> @@ -195,14 +197,20 @@ int wave5_vpu_dec_close(struct vpu_instance *inst, u32 *fail_res)
> int retry = 0;
> struct vpu_device *vpu_dev = inst->dev;
> int i;
> + int inst_count = 0;
> + struct vpu_instance *inst_elm;
>
> *fail_res = 0;
> if (!inst->codec_info)
> return -EINVAL;
>
> + pm_runtime_resume_and_get(inst->dev->dev);
> +
> ret = mutex_lock_interruptible(&vpu_dev->hw_lock);
> - if (ret)
> + if (ret) {
> + pm_runtime_put_sync(inst->dev->dev);
> return ret;
> + }
>
> do {
> ret = wave5_vpu_dec_finish_seq(inst, fail_res);
> @@ -232,9 +240,14 @@ int wave5_vpu_dec_close(struct vpu_instance *inst, u32 *fail_res)
>
> wave5_vdi_free_dma_memory(vpu_dev, &p_dec_info->vb_task);
>
> + list_for_each_entry(inst_elm, &vpu_dev->instances, list)
> + inst_count++;
> + if (inst_count == 1)
> + pm_runtime_dont_use_autosuspend(vpu_dev->dev);
> +
> unlock_and_return:
> mutex_unlock(&vpu_dev->hw_lock);
> -
> + pm_runtime_put_sync(inst->dev->dev);
> return ret;
> }
>
> @@ -697,25 +710,33 @@ int wave5_vpu_enc_close(struct vpu_instance *inst, u32 *fail_res)
> int ret;
> int retry = 0;
> struct vpu_device *vpu_dev = inst->dev;
> + int inst_count = 0;
> + struct vpu_instance *inst_elm;
>
> *fail_res = 0;
> if (!inst->codec_info)
> return -EINVAL;
>
> + pm_runtime_resume_and_get(inst->dev->dev);
> +
> ret = mutex_lock_interruptible(&vpu_dev->hw_lock);
> - if (ret)
> + if (ret) {
> + pm_runtime_resume_and_get(inst->dev->dev);
> return ret;
> + }
>
> do {
> ret = wave5_vpu_enc_finish_seq(inst, fail_res);
> if (ret < 0 && *fail_res != WAVE5_SYSERR_VPU_STILL_RUNNING) {
> dev_warn(inst->dev->dev, "enc_finish_seq timed out\n");
> + pm_runtime_resume_and_get(inst->dev->dev);
> mutex_unlock(&vpu_dev->hw_lock);
> return ret;
> }
>
> if (*fail_res == WAVE5_SYSERR_VPU_STILL_RUNNING &&
> retry++ >= MAX_FIRMWARE_CALL_RETRY) {
> + pm_runtime_resume_and_get(inst->dev->dev);
> mutex_unlock(&vpu_dev->hw_lock);
> return -ETIMEDOUT;
> }
> @@ -734,7 +755,13 @@ int wave5_vpu_enc_close(struct vpu_instance *inst, u32 *fail_res)
>
> wave5_vdi_free_dma_memory(vpu_dev, &p_enc_info->vb_task);
>
> + list_for_each_entry(inst_elm, &vpu_dev->instances, list)
> + inst_count++;
> + if (inst_count == 1)
> + pm_runtime_dont_use_autosuspend(vpu_dev->dev);
> +
> mutex_unlock(&vpu_dev->hw_lock);
> + pm_runtime_put_sync(inst->dev->dev);
>
> return 0;
> }
> diff --git a/drivers/media/platform/chips-media/wave5/wave5.h b/drivers/media/platform/chips-media/wave5/wave5.h
> index 2a29b9164f97..2caab356f3e1 100644
> --- a/drivers/media/platform/chips-media/wave5/wave5.h
> +++ b/drivers/media/platform/chips-media/wave5/wave5.h
> @@ -62,6 +62,9 @@ int wave5_vpu_get_version(struct vpu_device *vpu_dev, u32 *revision);
>
> int wave5_vpu_init(struct device *dev, u8 *fw, size_t size);
>
> +int wave5_vpu_sleep_wake(struct device *dev, bool i_sleep_wake, const uint16_t *code,
> + size_t size);
> +
> int wave5_vpu_reset(struct device *dev, enum sw_reset_mode reset_mode);
>
> int wave5_vpu_build_up_dec_param(struct vpu_instance *inst, struct dec_open_param *param);

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Next in thread: Nicolas Dufresne: "Re: [RESEND PATCH v7 2/4] media: chips-media: wave5: Support runtime suspend/resume"
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