On Tue, 2025-12-16 at 16:33 -0500, Nicolas Dufresne wrote:

Hi,

Le mardi 02 décembre 2025 à 17:47 +0800, Kyrie Wu a écrit :

quoted

The suspend/resume callback function is defined in the dev_pm_ops
structure, which is defined in platform_driver. For multiple-core
architecture, each hardware driver will register a platform_driver
structure, so it is necessary to add a suspend/resume callback
function for each hardware to support this operation.

Fixes: 934e8bccac95 ("mtk-jpegenc: support jpegenc multi-hardware")
Fixes: 0fa49df4222f ("media: mtk-jpegdec: support jpegdec multi-
hardware")

Signed-off-by: Kyrie Wu <redacted>
---
 .../platform/mediatek/jpeg/mtk_jpeg_core.c    | 28 +++----
 .../platform/mediatek/jpeg/mtk_jpeg_dec_hw.c  | 75
++++++++++++++++++-
 .../platform/mediatek/jpeg/mtk_jpeg_enc_hw.c  | 75
++++++++++++++++++-
 3 files changed, 151 insertions(+), 27 deletions(-)

diff --git a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c

b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
index 59fd79c89f88..e45d7e82b8a0 100644

--- a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
+++ b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c

@@ -1122,6 +1122,9 @@ static void mtk_jpeg_clk_on(struct

mtk_jpeg_dev *jpeg)
 {
 	int ret;
 
+	if (jpeg->variant->multi_core)
+		return;
+
 	ret = clk_bulk_prepare_enable(jpeg->variant->num_clks,
 				      jpeg->variant->clks);
 	if (ret)

@@ -1130,6 +1133,9 @@ static void mtk_jpeg_clk_on(struct

mtk_jpeg_dev *jpeg)
 
 static void mtk_jpeg_clk_off(struct mtk_jpeg_dev *jpeg)
 {
+	if (jpeg->variant->multi_core)
+		return;
+
 	clk_bulk_disable_unprepare(jpeg->variant->num_clks,
 				   jpeg->variant->clks);
 }

@@ -1658,13 +1664,6 @@ static void mtk_jpegenc_worker(struct

work_struct
*work)
 		goto enc_end;
 	}
 
-	ret = clk_prepare_enable(comp_jpeg[hw_id]->venc_clk.clks->clk);
-	if (ret) {
-		dev_err(jpeg->dev, "%s : %d, jpegenc clk_prepare_enable
fail\n",
-			__func__, __LINE__);
-		goto enc_end;
-	}
-
 	v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
 	v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
 

@@ -1762,20 +1761,13 @@ static void mtk_jpegdec_worker(struct

work_struct
*work)
 	jpeg_dst_buf->frame_num = ctx->total_frame_num;
 
 	mtk_jpegdec_set_hw_param(ctx, hw_id, src_buf, dst_buf);
-	ret = pm_runtime_get_sync(comp_jpeg[hw_id]->dev);
+	ret = pm_runtime_resume_and_get(comp_jpeg[hw_id]->dev);
 	if (ret < 0) {
 		dev_err(jpeg->dev, "%s : %d, pm_runtime_get_sync fail
!!!\n",
 			__func__, __LINE__);
 		goto dec_end;
 	}
 
-	ret = clk_prepare_enable(comp_jpeg[hw_id]->jdec_clk.clks->clk);
-	if (ret) {
-		dev_err(jpeg->dev, "%s : %d, jpegdec clk_prepare_enable
fail\n",
-			__func__, __LINE__);
-		goto clk_end;
-	}
-
 	v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
 	v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
 

@@ -1785,7 +1777,7 @@ static void mtk_jpegdec_worker(struct

work_struct *work)
 				 &dst_buf->vb2_buf, &fb)) {
 		dev_err(jpeg->dev, "%s : %d, mtk_jpeg_set_dec_dst
fail\n",
 			__func__, __LINE__);
-		goto setdst_end;
+		goto set_dst_fail;
 	}
 
 	schedule_delayed_work(&comp_jpeg[hw_id]->job_timeout_work,

@@ -1807,9 +1799,7 @@ static void mtk_jpegdec_worker(struct

work_struct *work)
 
 	return;
 
-setdst_end:
-	clk_disable_unprepare(comp_jpeg[hw_id]->jdec_clk.clks->clk);
-clk_end:
+set_dst_fail:
 	pm_runtime_put(comp_jpeg[hw_id]->dev);
 dec_end:
 	v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);

diff --git a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_dec_hw.c

b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_dec_hw.c
index 84d12eea35f7..5f1557dafad6 100644

--- a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_dec_hw.c
+++ b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_dec_hw.c

@@ -540,14 +540,13 @@ static void mtk_jpegdec_timeout_work(struct

work_struct
*work)
 	v4l2_m2m_buf_copy_metadata(src_buf, dst_buf, true);
 
 	mtk_jpeg_dec_reset(cjpeg->reg_base);
-	clk_disable_unprepare(cjpeg->jdec_clk.clks->clk);
-	pm_runtime_put(cjpeg->dev);
 	cjpeg->hw_state = MTK_JPEG_HW_IDLE;
 	atomic_inc(&master_jpeg->hw_rdy);
 	wake_up(&master_jpeg->hw_wq);
 	v4l2_m2m_buf_done(src_buf, buf_state);
 	mtk_jpegdec_put_buf(cjpeg);
 	jpeg_buf_queue_dec(ctx);
+	pm_runtime_put(cjpeg->dev);
 }
 
 static irqreturn_t mtk_jpegdec_hw_irq_handler(int irq, void *priv)

@@ -589,12 +588,11 @@ static irqreturn_t

mtk_jpegdec_hw_irq_handler(int irq,
void *priv)
 	v4l2_m2m_buf_done(src_buf, buf_state);
 	mtk_jpegdec_put_buf(jpeg);
 	jpeg_buf_queue_dec(ctx);
-	pm_runtime_put(ctx->jpeg->dev);
-	clk_disable_unprepare(jpeg->jdec_clk.clks->clk);
 
 	jpeg->hw_state = MTK_JPEG_HW_IDLE;
 	wake_up(&master_jpeg->hw_wq);
 	atomic_inc(&master_jpeg->hw_rdy);
+	pm_runtime_put(jpeg->dev);
 
 	return IRQ_HANDLED;
 }

@@ -677,15 +675,84 @@ static int mtk_jpegdec_hw_probe(struct

platform_device
*pdev)
 
 	platform_set_drvdata(pdev, dev);
 	pm_runtime_enable(&pdev->dev);
+	ret = devm_clk_bulk_get(dev->dev,
+				jpegdec_clk->clk_num,
+				jpegdec_clk->clks);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to init clk\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static void mtk_jpeg_clk_on(struct mtk_jpegdec_comp_dev *jpeg)
+{
+	int ret;
+
+	ret = clk_bulk_prepare_enable(jpeg->jdec_clk.clk_num,
+				      jpeg->jdec_clk.clks);
+	if (ret)
+		dev_err(jpeg->dev, "%s : %d, jpegdec clk_prepare_enable
fail\n",
+			__func__, __LINE__);
+}
+
+static void mtk_jpeg_clk_off(struct mtk_jpegdec_comp_dev *jpeg)
+{
+	clk_bulk_disable_unprepare(jpeg->jdec_clk.clk_num,
+				   jpeg->jdec_clk.clks);
+}
+
+static __maybe_unused int mtk_jpegdec_pm_suspend(struct device
*dev)

Its used its passed to mtk_jpegdec_pm_ops structure. Same below.
Unless you had
the intention to ifdef that structure and you forgot.

Thanks.
I will change to return clk_bulk_disable_unprepare(jpeg-

jdec_clk.clk_num, jpeg->jdec_clk.clks);

quoted

+{
+	struct mtk_jpegdec_comp_dev *jpeg = dev_get_drvdata(dev);
+
+	mtk_jpeg_clk_off(jpeg);
 
 	return 0;
 }
 
+static __maybe_unused int mtk_jpegdec_pm_resume(struct device
*dev)
+{
+	struct mtk_jpegdec_comp_dev *jpeg = dev_get_drvdata(dev);
+
+	mtk_jpeg_clk_on(jpeg);
+
+	return 0;
+}
+
+static __maybe_unused int mtk_jpegdec_suspend(struct device *dev)
+{
+	struct mtk_jpegdec_comp_dev *jpeg = dev_get_drvdata(dev);
+
+	v4l2_m2m_suspend(jpeg->master_dev->m2m_dev);
+	return pm_runtime_force_suspend(dev);
+}
+
+static __maybe_unused int mtk_jpegdec_resume(struct device *dev)
+{
+	struct mtk_jpegdec_comp_dev *jpeg = dev_get_drvdata(dev);
+	int ret;
+
+	ret = pm_runtime_force_resume(dev);
+	if (ret < 0)
+		return ret;
+
+	v4l2_m2m_resume(jpeg->master_dev->m2m_dev);
+	return ret;
+}
+
+static const struct dev_pm_ops mtk_jpegdec_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(mtk_jpegdec_suspend,
mtk_jpegdec_resume)
+	SET_RUNTIME_PM_OPS(mtk_jpegdec_pm_suspend,
mtk_jpegdec_pm_resume,
NULL)
+};
+
 static struct platform_driver mtk_jpegdec_hw_driver = {
 	.probe = mtk_jpegdec_hw_probe,
 	.driver = {
 		.name = "mtk-jpegdec-hw",
 		.of_match_table = mtk_jpegdec_hw_ids,
+		.pm             = &mtk_jpegdec_pm_ops,
 	},
 };
 

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 1862444f35f5..785db5ba4770 100644

--- a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_enc_hw.c
+++ b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_enc_hw.c

@@ -271,14 +271,13 @@ static void mtk_jpegenc_timeout_work(struct

work_struct
*work)
 	v4l2_m2m_buf_copy_metadata(src_buf, dst_buf, true);
 
 	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->hw_rdy);
 	wake_up(&master_jpeg->hw_wq);
 	v4l2_m2m_buf_done(src_buf, buf_state);
 	mtk_jpegenc_put_buf(cjpeg);
 	jpeg_buf_queue_enc(ctx);
+	pm_runtime_put(cjpeg->dev);
 }
 
 static irqreturn_t mtk_jpegenc_hw_irq_handler(int irq, void *priv)

@@ -313,12 +312,11 @@ static irqreturn_t

mtk_jpegenc_hw_irq_handler(int irq,
void *priv)
 	v4l2_m2m_buf_done(src_buf, buf_state);
 	mtk_jpegenc_put_buf(jpeg);
 	jpeg_buf_queue_enc(ctx);
-	pm_runtime_put(ctx->jpeg->dev);
-	clk_disable_unprepare(jpeg->venc_clk.clks->clk);
 
 	jpeg->hw_state = MTK_JPEG_HW_IDLE;
 	wake_up(&master_jpeg->hw_wq);
 	atomic_inc(&master_jpeg->hw_rdy);
+	pm_runtime_put(jpeg->dev);
 
 	return IRQ_HANDLED;
 }

@@ -399,15 +397,84 @@ static int mtk_jpegenc_hw_probe(struct

platform_device
*pdev)
 
 	platform_set_drvdata(pdev, dev);
 	pm_runtime_enable(&pdev->dev);
+	ret = devm_clk_bulk_get(dev->dev,
+				jpegenc_clk->clk_num,
+				jpegenc_clk->clks);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to init clk\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static void mtk_jpeg_clk_on(struct mtk_jpegenc_comp_dev *jpeg)
+{
+	int ret;
+
+	ret = clk_bulk_prepare_enable(jpeg->venc_clk.clk_num,
+				      jpeg->venc_clk.clks);
+	if (ret)
+		dev_err(jpeg->dev, "%s : %d, jpegenc clk_prepare_enable
fail\n",
+			__func__, __LINE__);
+}
+
+static void mtk_jpeg_clk_off(struct mtk_jpegenc_comp_dev *jpeg)
+{
+	clk_bulk_disable_unprepare(jpeg->venc_clk.clk_num,
+				   jpeg->venc_clk.clks);
+}
+
+static __maybe_unused int mtk_jpegenc_pm_suspend(struct device
*dev)
+{
+	struct mtk_jpegenc_comp_dev *jpeg = dev_get_drvdata(dev);
+
+	mtk_jpeg_clk_off(jpeg);

This is the only call to that function, move the code here.

Thanks, I will change it.

quoted

 
 	return 0;
 }
 
+static __maybe_unused int mtk_jpegenc_pm_resume(struct device
*dev)
+{
+	struct mtk_jpegenc_comp_dev *jpeg = dev_get_drvdata(dev);
+
+	mtk_jpeg_clk_on(jpeg);

This is the only call to that function, move the code here. Decides
if the ret
value should be passed or not too, add a comment if not.

Its worrying not too, since usually if the clock are not running, we
risk
hanging the CPU writing to registers.

Dear Nicolas,

Thanks for your kind suggestion. I also think the return value should
be handled. I will change it in the next version.

Regards,
Kyrie.

quoted

+
+	return 0;
+}
+
+static __maybe_unused int mtk_jpegenc_suspend(struct device *dev)
+{
+	struct mtk_jpegenc_comp_dev *jpeg = dev_get_drvdata(dev);
+
+	v4l2_m2m_suspend(jpeg->master_dev->m2m_dev);
+	return pm_runtime_force_suspend(dev);
+}
+
+static __maybe_unused int mtk_jpegenc_resume(struct device *dev)
+{
+	struct mtk_jpegenc_comp_dev *jpeg = dev_get_drvdata(dev);
+	int ret;
+
+	ret = pm_runtime_force_resume(dev);
+	if (ret < 0)
+		return ret;
+
+	v4l2_m2m_resume(jpeg->master_dev->m2m_dev);
+	return ret;
+}
+
+static const struct dev_pm_ops mtk_jpegenc_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(mtk_jpegenc_suspend,
mtk_jpegenc_resume)
+	SET_RUNTIME_PM_OPS(mtk_jpegenc_pm_suspend,
mtk_jpegenc_pm_resume,
NULL)
+};
+
 static struct platform_driver mtk_jpegenc_hw_driver = {
 	.probe = mtk_jpegenc_hw_probe,
 	.driver = {
 		.name = "mtk-jpegenc-hw",
 		.of_match_table = mtk_jpegenc_drv_ids,
+		.pm = &mtk_jpegenc_pm_ops,
 	},
 };
 

Looks like the right way though,looking forward an update.

Nicolas
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