mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-25 16:31:13 +00:00
160 lines
4.5 KiB
Diff
160 lines
4.5 KiB
Diff
From c7660cc977621c4a14d870d523918df067f0db39 Mon Sep 17 00:00:00 2001
|
|
From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
|
|
Date: Fri, 23 Apr 2021 16:47:42 +0200
|
|
Subject: [PATCH 155/247] media: atmel: properly get pm_runtime
|
|
|
|
There are several issues in the way the atmel driver handles
|
|
pm_runtime_get_sync():
|
|
|
|
- it doesn't check return codes;
|
|
- it doesn't properly decrement the usage_count on all places;
|
|
- it starts streaming even if pm_runtime_get_sync() fails.
|
|
- while it tries to get pm_runtime at the clock enable logic,
|
|
it doesn't check if the operation was suceeded.
|
|
|
|
Replace all occurrences of it to use the new kAPI:
|
|
pm_runtime_resume_and_get(), which ensures that, if the
|
|
return code is not negative, the usage_count was incremented.
|
|
|
|
With that, add additional checks when this is called, in order
|
|
to ensure that errors will be properly addressed.
|
|
|
|
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
|
|
---
|
|
drivers/media/platform/atmel/atmel-isc-base.c | 30 ++++++++++++++-----
|
|
drivers/media/platform/atmel/atmel-isi.c | 19 +++++++++---
|
|
2 files changed, 38 insertions(+), 11 deletions(-)
|
|
|
|
--- a/drivers/media/platform/atmel/atmel-isc-base.c
|
|
+++ b/drivers/media/platform/atmel/atmel-isc-base.c
|
|
@@ -294,9 +294,13 @@ static int isc_wait_clk_stable(struct cl
|
|
static int isc_clk_prepare(struct clk_hw *hw)
|
|
{
|
|
struct isc_clk *isc_clk = to_isc_clk(hw);
|
|
+ int ret;
|
|
|
|
- if (isc_clk->id == ISC_ISPCK)
|
|
- pm_runtime_get_sync(isc_clk->dev);
|
|
+ if (isc_clk->id == ISC_ISPCK) {
|
|
+ ret = pm_runtime_resume_and_get(isc_clk->dev);
|
|
+ if (ret < 0)
|
|
+ return ret;
|
|
+ }
|
|
|
|
return isc_wait_clk_stable(hw);
|
|
}
|
|
@@ -353,9 +357,13 @@ static int isc_clk_is_enabled(struct clk
|
|
{
|
|
struct isc_clk *isc_clk = to_isc_clk(hw);
|
|
u32 status;
|
|
+ int ret;
|
|
|
|
- if (isc_clk->id == ISC_ISPCK)
|
|
- pm_runtime_get_sync(isc_clk->dev);
|
|
+ if (isc_clk->id == ISC_ISPCK) {
|
|
+ ret = pm_runtime_resume_and_get(isc_clk->dev);
|
|
+ if (ret < 0)
|
|
+ return 0;
|
|
+ }
|
|
|
|
regmap_read(isc_clk->regmap, ISC_CLKSR, &status);
|
|
|
|
@@ -807,7 +815,12 @@ static int isc_start_streaming(struct vb
|
|
goto err_start_stream;
|
|
}
|
|
|
|
- pm_runtime_get_sync(isc->dev);
|
|
+ ret = pm_runtime_resume_and_get(isc->dev);
|
|
+ if (ret < 0) {
|
|
+ v4l2_err(&isc->v4l2_dev, "RPM resume failed in subdev %d\n",
|
|
+ ret);
|
|
+ goto err_pm_get;
|
|
+ }
|
|
|
|
ret = isc_configure(isc);
|
|
if (unlikely(ret))
|
|
@@ -838,7 +851,7 @@ static int isc_start_streaming(struct vb
|
|
|
|
err_configure:
|
|
pm_runtime_put_sync(isc->dev);
|
|
-
|
|
+err_pm_get:
|
|
v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0);
|
|
|
|
err_start_stream:
|
|
@@ -1809,6 +1822,7 @@ static void isc_awb_work(struct work_str
|
|
u32 baysel;
|
|
unsigned long flags;
|
|
u32 min, max;
|
|
+ int ret;
|
|
|
|
/* streaming is not active anymore */
|
|
if (isc->stop)
|
|
@@ -1831,7 +1845,9 @@ static void isc_awb_work(struct work_str
|
|
ctrls->hist_id = hist_id;
|
|
baysel = isc->config.sd_format->cfa_baycfg << ISC_HIS_CFG_BAYSEL_SHIFT;
|
|
|
|
- pm_runtime_get_sync(isc->dev);
|
|
+ ret = pm_runtime_resume_and_get(isc->dev);
|
|
+ if (ret < 0)
|
|
+ return;
|
|
|
|
/*
|
|
* only update if we have all the required histograms and controls
|
|
--- a/drivers/media/platform/atmel/atmel-isi.c
|
|
+++ b/drivers/media/platform/atmel/atmel-isi.c
|
|
@@ -423,7 +423,9 @@ static int start_streaming(struct vb2_qu
|
|
struct frame_buffer *buf, *node;
|
|
int ret;
|
|
|
|
- pm_runtime_get_sync(isi->dev);
|
|
+ ret = pm_runtime_resume_and_get(isi->dev);
|
|
+ if (ret < 0)
|
|
+ return ret;
|
|
|
|
/* Enable stream on the sub device */
|
|
ret = v4l2_subdev_call(isi->entity.subdev, video, s_stream, 1);
|
|
@@ -783,9 +785,10 @@ static int isi_enum_frameintervals(struc
|
|
return 0;
|
|
}
|
|
|
|
-static void isi_camera_set_bus_param(struct atmel_isi *isi)
|
|
+static int isi_camera_set_bus_param(struct atmel_isi *isi)
|
|
{
|
|
u32 cfg1 = 0;
|
|
+ int ret;
|
|
|
|
/* set bus param for ISI */
|
|
if (isi->pdata.hsync_act_low)
|
|
@@ -802,12 +805,16 @@ static void isi_camera_set_bus_param(str
|
|
cfg1 |= ISI_CFG1_THMASK_BEATS_16;
|
|
|
|
/* Enable PM and peripheral clock before operate isi registers */
|
|
- pm_runtime_get_sync(isi->dev);
|
|
+ ret = pm_runtime_resume_and_get(isi->dev);
|
|
+ if (ret < 0)
|
|
+ return ret;
|
|
|
|
isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
|
|
isi_writel(isi, ISI_CFG1, cfg1);
|
|
|
|
pm_runtime_put(isi->dev);
|
|
+
|
|
+ return 0;
|
|
}
|
|
|
|
/* -----------------------------------------------------------------------*/
|
|
@@ -1086,7 +1093,11 @@ static int isi_graph_notify_complete(str
|
|
dev_err(isi->dev, "No supported mediabus format found\n");
|
|
return ret;
|
|
}
|
|
- isi_camera_set_bus_param(isi);
|
|
+ ret = isi_camera_set_bus_param(isi);
|
|
+ if (ret) {
|
|
+ dev_err(isi->dev, "Can't wake up device\n");
|
|
+ return ret;
|
|
+ }
|
|
|
|
ret = isi_set_default_fmt(isi);
|
|
if (ret) {
|