[1/2] remoteproc: ingenic: Move clock handling to prepare/unprepare callbacks
diff mbox series

Message ID 20200630163118.3830422-2-mathieu.poirier@linaro.org
State New
Headers show
Series
  • remoteproc: Address runtime PM issues
Related show

Commit Message

Mathieu Poirier June 30, 2020, 4:31 p.m. UTC
This patch moves clock related operations to the remoteproc prepare()
and unprepare() callbacks so that the PM runtime framework doesn't
have to be involved needlessly.  This provides a simpler approach and
requires less code.

Based on the work from Paul Cercueil published here:
https://lore.kernel.org/linux-remoteproc/20191116170846.67220-4-paul@crapouillou.net/

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
 drivers/remoteproc/ingenic_rproc.c | 84 +++++++++---------------------
 1 file changed, 26 insertions(+), 58 deletions(-)

Comments

Suman Anna July 1, 2020, 9:27 p.m. UTC | #1
Hi Mathieu,

On 6/30/20 11:31 AM, Mathieu Poirier wrote:
> This patch moves clock related operations to the remoteproc prepare()
> and unprepare() callbacks so that the PM runtime framework doesn't
> have to be involved needlessly.  This provides a simpler approach and
> requires less code.
> 
> Based on the work from Paul Cercueil published here:
> https://lore.kernel.org/linux-remoteproc/20191116170846.67220-4-paul@crapouillou.net/
> 
> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
> ---
>   drivers/remoteproc/ingenic_rproc.c | 84 +++++++++---------------------
>   1 file changed, 26 insertions(+), 58 deletions(-)
> 
> diff --git a/drivers/remoteproc/ingenic_rproc.c b/drivers/remoteproc/ingenic_rproc.c
> index 189020d77b25..b0fc8eace6ec 100644
> --- a/drivers/remoteproc/ingenic_rproc.c
> +++ b/drivers/remoteproc/ingenic_rproc.c
> @@ -11,7 +11,6 @@
>   #include <linux/io.h>
>   #include <linux/module.h>
>   #include <linux/platform_device.h>
> -#include <linux/pm_runtime.h>
>   #include <linux/remoteproc.h>
>   
>   #include "remoteproc_internal.h"
> @@ -62,6 +61,28 @@ struct vpu {
>   	struct device *dev;
>   };
>   
> +static int ingenic_rproc_prepare(struct rproc *rproc)
> +{
> +	struct vpu *vpu = rproc->priv;
> +	int ret;
> +
> +	/* The clocks must be enabled for the firmware to be loaded in TCSM */
> +	ret = clk_bulk_prepare_enable(ARRAY_SIZE(vpu->clks), vpu->clks);
> +	if (ret)
> +		dev_err(vpu->dev, "Unable to start clocks: %d", ret);

Minor nit, add a newline character at the end of the trace statement.

With that,
Reviewed-by: Suman Anna <s-anna@ti.com>

> +
> +	return ret;
> +}
> +
> +static int ingenic_rproc_unprepare(struct rproc *rproc)
> +{
> +	struct vpu *vpu = rproc->priv;
> +
> +	clk_bulk_disable_unprepare(ARRAY_SIZE(vpu->clks), vpu->clks);
> +
> +	return 0;
> +}
> +
>   static int ingenic_rproc_start(struct rproc *rproc)
>   {
>   	struct vpu *vpu = rproc->priv;
> @@ -115,6 +136,8 @@ static void *ingenic_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len)
>   }
>   
>   static struct rproc_ops ingenic_rproc_ops = {
> +	.prepare = ingenic_rproc_prepare,
> +	.unprepare = ingenic_rproc_unprepare,
>   	.start = ingenic_rproc_start,
>   	.stop = ingenic_rproc_stop,
>   	.kick = ingenic_rproc_kick,
> @@ -135,16 +158,6 @@ static irqreturn_t vpu_interrupt(int irq, void *data)
>   	return rproc_vq_interrupt(rproc, vring);
>   }
>   
> -static void ingenic_rproc_disable_clks(void *data)
> -{
> -	struct vpu *vpu = data;
> -
> -	pm_runtime_resume(vpu->dev);
> -	pm_runtime_disable(vpu->dev);
> -
> -	clk_bulk_disable_unprepare(ARRAY_SIZE(vpu->clks), vpu->clks);
> -}
> -
>   static int ingenic_rproc_probe(struct platform_device *pdev)
>   {
>   	struct device *dev = &pdev->dev;
> @@ -206,35 +219,13 @@ static int ingenic_rproc_probe(struct platform_device *pdev)
>   
>   	disable_irq(vpu->irq);
>   
> -	/* The clocks must be enabled for the firmware to be loaded in TCSM */
> -	ret = clk_bulk_prepare_enable(ARRAY_SIZE(vpu->clks), vpu->clks);
> -	if (ret) {
> -		dev_err(dev, "Unable to start clocks\n");
> -		return ret;
> -	}
> -
> -	pm_runtime_irq_safe(dev);
> -	pm_runtime_set_active(dev);
> -	pm_runtime_enable(dev);
> -	pm_runtime_get_sync(dev);
> -	pm_runtime_use_autosuspend(dev);
> -
> -	ret = devm_add_action_or_reset(dev, ingenic_rproc_disable_clks, vpu);
> -	if (ret) {
> -		dev_err(dev, "Unable to register action\n");
> -		goto out_pm_put;
> -	}
> -
>   	ret = devm_rproc_add(dev, rproc);
>   	if (ret) {
>   		dev_err(dev, "Failed to register remote processor\n");
> -		goto out_pm_put;
> +		return ret;
>   	}
>   
> -out_pm_put:
> -	pm_runtime_put_autosuspend(dev);
> -
> -	return ret;
> +	return 0;
>   }
>   
>   static const struct of_device_id ingenic_rproc_of_matches[] = {
> @@ -243,33 +234,10 @@ static const struct of_device_id ingenic_rproc_of_matches[] = {
>   };
>   MODULE_DEVICE_TABLE(of, ingenic_rproc_of_matches);
>   
> -static int __maybe_unused ingenic_rproc_suspend(struct device *dev)
> -{
> -	struct vpu *vpu = dev_get_drvdata(dev);
> -
> -	clk_bulk_disable(ARRAY_SIZE(vpu->clks), vpu->clks);
> -
> -	return 0;
> -}
> -
> -static int __maybe_unused ingenic_rproc_resume(struct device *dev)
> -{
> -	struct vpu *vpu = dev_get_drvdata(dev);
> -
> -	return clk_bulk_enable(ARRAY_SIZE(vpu->clks), vpu->clks);
> -}
> -
> -static const struct dev_pm_ops __maybe_unused ingenic_rproc_pm = {
> -	SET_RUNTIME_PM_OPS(ingenic_rproc_suspend, ingenic_rproc_resume, NULL)
> -};
> -
>   static struct platform_driver ingenic_rproc_driver = {
>   	.probe = ingenic_rproc_probe,
>   	.driver = {
>   		.name = "ingenic-vpu",
> -#ifdef CONFIG_PM
> -		.pm = &ingenic_rproc_pm,
> -#endif
>   		.of_match_table = ingenic_rproc_of_matches,
>   	},
>   };
>

Patch
diff mbox series

diff --git a/drivers/remoteproc/ingenic_rproc.c b/drivers/remoteproc/ingenic_rproc.c
index 189020d77b25..b0fc8eace6ec 100644
--- a/drivers/remoteproc/ingenic_rproc.c
+++ b/drivers/remoteproc/ingenic_rproc.c
@@ -11,7 +11,6 @@ 
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
-#include <linux/pm_runtime.h>
 #include <linux/remoteproc.h>
 
 #include "remoteproc_internal.h"
@@ -62,6 +61,28 @@  struct vpu {
 	struct device *dev;
 };
 
+static int ingenic_rproc_prepare(struct rproc *rproc)
+{
+	struct vpu *vpu = rproc->priv;
+	int ret;
+
+	/* The clocks must be enabled for the firmware to be loaded in TCSM */
+	ret = clk_bulk_prepare_enable(ARRAY_SIZE(vpu->clks), vpu->clks);
+	if (ret)
+		dev_err(vpu->dev, "Unable to start clocks: %d", ret);
+
+	return ret;
+}
+
+static int ingenic_rproc_unprepare(struct rproc *rproc)
+{
+	struct vpu *vpu = rproc->priv;
+
+	clk_bulk_disable_unprepare(ARRAY_SIZE(vpu->clks), vpu->clks);
+
+	return 0;
+}
+
 static int ingenic_rproc_start(struct rproc *rproc)
 {
 	struct vpu *vpu = rproc->priv;
@@ -115,6 +136,8 @@  static void *ingenic_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len)
 }
 
 static struct rproc_ops ingenic_rproc_ops = {
+	.prepare = ingenic_rproc_prepare,
+	.unprepare = ingenic_rproc_unprepare,
 	.start = ingenic_rproc_start,
 	.stop = ingenic_rproc_stop,
 	.kick = ingenic_rproc_kick,
@@ -135,16 +158,6 @@  static irqreturn_t vpu_interrupt(int irq, void *data)
 	return rproc_vq_interrupt(rproc, vring);
 }
 
-static void ingenic_rproc_disable_clks(void *data)
-{
-	struct vpu *vpu = data;
-
-	pm_runtime_resume(vpu->dev);
-	pm_runtime_disable(vpu->dev);
-
-	clk_bulk_disable_unprepare(ARRAY_SIZE(vpu->clks), vpu->clks);
-}
-
 static int ingenic_rproc_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -206,35 +219,13 @@  static int ingenic_rproc_probe(struct platform_device *pdev)
 
 	disable_irq(vpu->irq);
 
-	/* The clocks must be enabled for the firmware to be loaded in TCSM */
-	ret = clk_bulk_prepare_enable(ARRAY_SIZE(vpu->clks), vpu->clks);
-	if (ret) {
-		dev_err(dev, "Unable to start clocks\n");
-		return ret;
-	}
-
-	pm_runtime_irq_safe(dev);
-	pm_runtime_set_active(dev);
-	pm_runtime_enable(dev);
-	pm_runtime_get_sync(dev);
-	pm_runtime_use_autosuspend(dev);
-
-	ret = devm_add_action_or_reset(dev, ingenic_rproc_disable_clks, vpu);
-	if (ret) {
-		dev_err(dev, "Unable to register action\n");
-		goto out_pm_put;
-	}
-
 	ret = devm_rproc_add(dev, rproc);
 	if (ret) {
 		dev_err(dev, "Failed to register remote processor\n");
-		goto out_pm_put;
+		return ret;
 	}
 
-out_pm_put:
-	pm_runtime_put_autosuspend(dev);
-
-	return ret;
+	return 0;
 }
 
 static const struct of_device_id ingenic_rproc_of_matches[] = {
@@ -243,33 +234,10 @@  static const struct of_device_id ingenic_rproc_of_matches[] = {
 };
 MODULE_DEVICE_TABLE(of, ingenic_rproc_of_matches);
 
-static int __maybe_unused ingenic_rproc_suspend(struct device *dev)
-{
-	struct vpu *vpu = dev_get_drvdata(dev);
-
-	clk_bulk_disable(ARRAY_SIZE(vpu->clks), vpu->clks);
-
-	return 0;
-}
-
-static int __maybe_unused ingenic_rproc_resume(struct device *dev)
-{
-	struct vpu *vpu = dev_get_drvdata(dev);
-
-	return clk_bulk_enable(ARRAY_SIZE(vpu->clks), vpu->clks);
-}
-
-static const struct dev_pm_ops __maybe_unused ingenic_rproc_pm = {
-	SET_RUNTIME_PM_OPS(ingenic_rproc_suspend, ingenic_rproc_resume, NULL)
-};
-
 static struct platform_driver ingenic_rproc_driver = {
 	.probe = ingenic_rproc_probe,
 	.driver = {
 		.name = "ingenic-vpu",
-#ifdef CONFIG_PM
-		.pm = &ingenic_rproc_pm,
-#endif
 		.of_match_table = ingenic_rproc_of_matches,
 	},
 };