Instead of open-coding the clk enable/disable in all of the callers
move this to the RPM suspend/resume functions.
Signed-off-by: Lucas Stach <l.st...@pengutronix.de>
Signed-off-by: Philipp Zabel <p.za...@pengutronix.de>
---
drivers/gpu/ipu-v3/ipu-prg.c | 71 +++++++++++++++++++++++++++++++-------------
1 file changed, 50 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/ipu-v3/ipu-prg.c b/drivers/gpu/ipu-v3/ipu-prg.c
index 0013ca9f72c8..fd98f48e8a08 100644
--- a/drivers/gpu/ipu-v3/ipu-prg.c
+++ b/drivers/gpu/ipu-v3/ipu-prg.c
@@ -20,6 +20,7 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <video/imx-ipu-v3.h>
@@ -139,21 +140,11 @@ EXPORT_SYMBOL_GPL(ipu_prg_format_supported);
int ipu_prg_enable(struct ipu_soc *ipu)
{
struct ipu_prg *prg = ipu->prg_priv;
- int ret;
if (!prg)
return 0;
- ret = clk_prepare_enable(prg->clk_axi);
- if (ret)
- goto fail_disable_ipg;
-
- return 0;
-
-fail_disable_ipg:
- clk_disable_unprepare(prg->clk_ipg);
-
- return ret;
+ return pm_runtime_get_sync(prg->dev);
}
EXPORT_SYMBOL_GPL(ipu_prg_enable);
@@ -164,7 +155,7 @@ void ipu_prg_disable(struct ipu_soc *ipu)
if (!prg)
return;
- clk_disable_unprepare(prg->clk_axi);
+ pm_runtime_put(prg->dev);
}
EXPORT_SYMBOL_GPL(ipu_prg_disable);
@@ -255,7 +246,7 @@ void ipu_prg_channel_disable(struct ipuv3_channel *ipu_chan)
if (!chan->enabled || prg_chan < 0)
return;
- clk_prepare_enable(prg->clk_ipg);
+ pm_runtime_get_sync(prg->dev);
val = readl(prg->regs + IPU_PRG_CTL);
val |= IPU_PRG_CTL_BYPASS(prg_chan);
@@ -264,7 +255,7 @@ void ipu_prg_channel_disable(struct ipuv3_channel *ipu_chan)
val = IPU_PRG_REG_UPDATE_REG_UPDATE;
writel(val, prg->regs + IPU_PRG_REG_UPDATE);
- clk_disable_unprepare(prg->clk_ipg);
+ pm_runtime_put(prg->dev);
ipu_prg_put_pre(prg, prg_chan);
@@ -299,11 +290,7 @@ int ipu_prg_channel_configure(struct ipuv3_channel
*ipu_chan,
width, height, stride, format, *eba);
- ret = clk_prepare_enable(prg->clk_ipg);
- if (ret) {
- ipu_prg_put_pre(prg, prg_chan);
- return ret;
- }
+ pm_runtime_get_sync(prg->dev);
val = (stride - 1) & IPU_PRG_STRIDE_STRIDE_MASK;
writel(val, prg->regs + IPU_PRG_STRIDE(prg_chan));
@@ -336,7 +323,7 @@ int ipu_prg_channel_configure(struct ipuv3_channel
*ipu_chan,
(val & IPU_PRG_STATUS_BUFFER1_READY(prg_chan)),
5, 1000);
- clk_disable_unprepare(prg->clk_ipg);
+ pm_runtime_put(prg->dev);
chan->enabled = true;
return 0;
@@ -384,6 +371,12 @@ static int ipu_prg_probe(struct platform_device *pdev)
if (ret)
return ret;
+ ret = clk_prepare_enable(prg->clk_axi);
+ if (ret) {
+ clk_disable_unprepare(prg->clk_ipg);
+ return ret;
+ }
+
/* init to free running mode */
val = readl(prg->regs + IPU_PRG_CTL);
val |= IPU_PRG_CTL_SHADOW_EN;
@@ -392,7 +385,8 @@ static int ipu_prg_probe(struct platform_device *pdev)
/* disable address threshold */
writel(0xffffffff, prg->regs + IPU_PRG_THD);
- clk_disable_unprepare(prg->clk_ipg);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
prg->dev = dev;
platform_set_drvdata(pdev, prg);
@@ -414,6 +408,40 @@ static int ipu_prg_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM
+static int prg_suspend(struct device *dev)
+{
+ struct ipu_prg *prg = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(prg->clk_axi);
+ clk_disable_unprepare(prg->clk_ipg);
+
+ return 0;
+}
+
+static int prg_resume(struct device *dev)
+{
+ struct ipu_prg *prg = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_prepare_enable(prg->clk_ipg);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(prg->clk_axi);
+ if (ret) {
+ clk_disable_unprepare(prg->clk_ipg);
+ return ret;
+ }
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops prg_pm_ops = {
+ SET_RUNTIME_PM_OPS(prg_suspend, prg_resume, NULL)
+};
+
static const struct of_device_id ipu_prg_dt_ids[] = {
{ .compatible = "fsl,imx6qp-prg", },
{ /* sentinel */ },
@@ -424,6 +452,7 @@ struct platform_driver ipu_prg_drv = {
.remove = ipu_prg_remove,
.driver = {
.name = "imx-ipu-prg",
+ .pm = &prg_pm_ops,
.of_match_table = ipu_prg_dt_ids,
},
};
--
2.11.0
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