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Subject: media: cedrus: Fix clock/reset sequence
Author: Jernej Skrabec <jernej.skra...@gmail.com>
Date: Mon Sep 11 20:46:12 2023 +0200
According to H6 user manual, resets should always be de-asserted before
clocks are enabled. This is also consistent with vendor driver.
Fixes: d5aecd289bab ("media: cedrus: Implement runtime PM")
Signed-off-by: Jernej Skrabec <jernej.skra...@gmail.com>
Acked-by: Paul Kocialkowski <paul.kocialkow...@bootlin.com>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
drivers/staging/media/sunxi/cedrus/cedrus_hw.c | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)
---
diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_hw.c
b/drivers/staging/media/sunxi/cedrus/cedrus_hw.c
index b696bf884cbd..32af0e96e762 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus_hw.c
+++ b/drivers/staging/media/sunxi/cedrus/cedrus_hw.c
@@ -172,12 +172,12 @@ int cedrus_hw_suspend(struct device *device)
{
struct cedrus_dev *dev = dev_get_drvdata(device);
- reset_control_assert(dev->rstc);
-
clk_disable_unprepare(dev->ram_clk);
clk_disable_unprepare(dev->mod_clk);
clk_disable_unprepare(dev->ahb_clk);
+ reset_control_assert(dev->rstc);
+
return 0;
}
@@ -186,11 +186,18 @@ int cedrus_hw_resume(struct device *device)
struct cedrus_dev *dev = dev_get_drvdata(device);
int ret;
+ ret = reset_control_reset(dev->rstc);
+ if (ret) {
+ dev_err(dev->dev, "Failed to apply reset\n");
+
+ return ret;
+ }
+
ret = clk_prepare_enable(dev->ahb_clk);
if (ret) {
dev_err(dev->dev, "Failed to enable AHB clock\n");
- return ret;
+ goto err_rst;
}
ret = clk_prepare_enable(dev->mod_clk);
@@ -207,21 +214,14 @@ int cedrus_hw_resume(struct device *device)
goto err_mod_clk;
}
- ret = reset_control_reset(dev->rstc);
- if (ret) {
- dev_err(dev->dev, "Failed to apply reset\n");
-
- goto err_ram_clk;
- }
-
return 0;
-err_ram_clk:
- clk_disable_unprepare(dev->ram_clk);
err_mod_clk:
clk_disable_unprepare(dev->mod_clk);
err_ahb_clk:
clk_disable_unprepare(dev->ahb_clk);
+err_rst:
+ reset_control_assert(dev->rstc);
return ret;
}
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