[v11,22/28] media: platform: Change the call functions of getting/enable/disable the jpeg's clock

Commit Message

Xia Jiang Aug. 4, 2020, 3:40 a.m. UTC

Use the generic clk_bulk_* helpers to enable and disable clocks.

Signed-off-by: Xia Jiang <[e-mail]>
---
v11: specify the names of the clocks in the driver
---
 .../media/platform/mtk-jpeg/mtk_jpeg_core.c   | 28 +++++++++++++------
 .../media/platform/mtk-jpeg/mtk_jpeg_core.h   |  8 +++---
 2 files changed, 23 insertions(+), 13 deletions(-)

Comments

Tomasz Figa Aug. 5, 2020, 1:55 p.m. UTC | #1

Hi Xia,

On Tue, Aug 04, 2020 at 11:40:56AM +0800, Xia Jiang wrote:
> Use the generic clk_bulk_* helpers to enable and disable clocks.
> 
> Signed-off-by: Xia Jiang <[e-mail]>
> ---
> v11: specify the names of the clocks in the driver
> ---
>  .../media/platform/mtk-jpeg/mtk_jpeg_core.c   | 28 +++++++++++++------
>  .../media/platform/mtk-jpeg/mtk_jpeg_core.h   |  8 +++---
>  2 files changed, 23 insertions(+), 13 deletions(-)
> 

Thank you for the patch. It looks good to me.

Reviewed-by: Tomasz Figa <[e-mail]>

One comment below about a thing that should be fixed in the future,
separately from this series.

> diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
> index 7881e9c93df7..47d570f32e3f 100644
> --- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
> +++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
> @@ -783,14 +783,15 @@ static void mtk_jpeg_clk_on(struct mtk_jpeg_dev *jpeg)
>  	ret = mtk_smi_larb_get(jpeg->larb);
>  	if (ret)
>  		dev_err(jpeg->dev, "mtk_smi_larb_get larbvdec fail %d\n", ret);
> -	clk_prepare_enable(jpeg->clk_jdec_smi);
> -	clk_prepare_enable(jpeg->clk_jdec);
> +
> +	ret = clk_bulk_prepare_enable(jpeg->num_clks, jpeg->clks);
> +	if (ret)
> +		dev_err(jpeg->dev, "Failed to open jpeg clk: %d\n", ret);

The errors in this function should be propagated to the caller and
handled properly across the whole call stack.

Best regards,
Tomasz

Patch

diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
index 7881e9c93df7..47d570f32e3f 100644
--- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
+++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
@@ -783,14 +783,15 @@  static void mtk_jpeg_clk_on(struct mtk_jpeg_dev *jpeg)
 	ret = mtk_smi_larb_get(jpeg->larb);
 	if (ret)
 		dev_err(jpeg->dev, "mtk_smi_larb_get larbvdec fail %d\n", ret);
-	clk_prepare_enable(jpeg->clk_jdec_smi);
-	clk_prepare_enable(jpeg->clk_jdec);
+
+	ret = clk_bulk_prepare_enable(jpeg->num_clks, jpeg->clks);
+	if (ret)
+		dev_err(jpeg->dev, "Failed to open jpeg clk: %d\n", ret);
 }
 
 static void mtk_jpeg_clk_off(struct mtk_jpeg_dev *jpeg)
 {
-	clk_disable_unprepare(jpeg->clk_jdec);
-	clk_disable_unprepare(jpeg->clk_jdec_smi);
+	clk_bulk_disable_unprepare(jpeg->num_clks, jpeg->clks);
 	mtk_smi_larb_put(jpeg->larb);
 }
 
@@ -935,10 +936,16 @@  static const struct v4l2_file_operations mtk_jpeg_fops = {
 	.mmap           = v4l2_m2m_fop_mmap,
 };
 
+static struct clk_bulk_data mt8173_jpeg_dec_clocks[] = {
+	{ .id = "jpgdec-smi" },
+	{ .id = "jpgdec" },
+};
+
 static int mtk_jpeg_clk_init(struct mtk_jpeg_dev *jpeg)
 {
 	struct device_node *node;
 	struct platform_device *pdev;
+	int ret;
 
 	node = of_parse_phandle(jpeg->dev->of_node, "mediatek,larb", 0);
 	if (!node)
@@ -952,12 +959,15 @@  static int mtk_jpeg_clk_init(struct mtk_jpeg_dev *jpeg)
 
 	jpeg->larb = &pdev->dev;
 
-	jpeg->clk_jdec = devm_clk_get(jpeg->dev, "jpgdec");
-	if (IS_ERR(jpeg->clk_jdec))
-		return PTR_ERR(jpeg->clk_jdec);
+	jpeg->clks = mt8173_jpeg_dec_clocks;
+	jpeg->num_clks = ARRAY_SIZE(mt8173_jpeg_dec_clocks);
+	ret = devm_clk_bulk_get(jpeg->dev, jpeg->num_clks, jpeg->clks);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to get jpeg clock:%d\n", ret);
+		return ret;
+	}
 
-	jpeg->clk_jdec_smi = devm_clk_get(jpeg->dev, "jpgdec-smi");
-	return PTR_ERR_OR_ZERO(jpeg->clk_jdec_smi);
+	return 0;
 }
 
 static void mtk_jpeg_job_timeout_work(struct work_struct *work)
diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h
index 4c76a9dcc4b7..a54e1e82e655 100644
--- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h
+++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h
@@ -52,8 +52,8 @@  enum mtk_jpeg_ctx_state {
  * @alloc_ctx:		videobuf2 memory allocator's context
  * @dec_vdev:		video device node for decoder mem2mem mode
  * @dec_reg_base:	JPEG registers mapping
- * @clk_jdec:		JPEG hw working clock
- * @clk_jdec_smi:	JPEG SMI bus clock
+ * @clks:		clock names
+ * @num_clks:		numbers of clock
  * @larb:		SMI device
  * @job_timeout_work:	IRQ timeout structure
  */
@@ -67,8 +67,8 @@  struct mtk_jpeg_dev {
 	void			*alloc_ctx;
 	struct video_device	*dec_vdev;
 	void __iomem		*dec_reg_base;
-	struct clk		*clk_jdec;
-	struct clk		*clk_jdec_smi;
+	struct clk_bulk_data *clks;
+	int num_clks;
 	struct device		*larb;
 	struct delayed_work job_timeout_work;
 };