Add debug messages to know about what's happening in hardware and how
driver reacts.
Signed-off-by: Dmitry Osipenko <dig...@gmail.com>
---
drivers/devfreq/tegra30-devfreq.c | 35 +++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/drivers/devfreq/tegra30-devfreq.c
b/drivers/devfreq/tegra30-devfreq.c
index 878c9396bb8c..c6c4a07d3e07 100644
--- a/drivers/devfreq/tegra30-devfreq.c
+++ b/drivers/devfreq/tegra30-devfreq.c
@@ -41,6 +41,7 @@
#define ACTMON_DEV_AVG_UPPER_WMARK 0x10
#define ACTMON_DEV_AVG_LOWER_WMARK 0x14
#define ACTMON_DEV_COUNT_WEIGHT 0x18
+#define ACTMON_DEV_COUNT 0x1c
#define ACTMON_DEV_AVG_COUNT 0x20
#define ACTMON_DEV_INTR_STATUS 0x24
@@ -276,6 +277,9 @@ static void tegra_actmon_get_lower_upper(struct
tegra_devfreq *tegra,
unsigned long *lower,
unsigned long *upper)
{
+ struct device *ddev = tegra->devfreq->dev.parent;
+ u32 offset = dev->config->offset;
+
/*
* Memory frequencies are guaranteed to have 1MHz granularity
* and thus we need this rounding down to get a proper watermarks
@@ -288,6 +292,9 @@ static void tegra_actmon_get_lower_upper(struct
tegra_devfreq *tegra,
*lower = tegra_actmon_lower_freq(tegra, target_freq);
*upper = tegra_actmon_upper_freq(tegra, target_freq);
+ dev_dbg(ddev, "%03x: target_freq %lu lower freq %lu upper freq %lu\n",
+ offset, target_freq, *lower, *upper);
+
*lower /= KHZ;
*upper /= KHZ;
@@ -367,11 +374,31 @@ static void tegra_devfreq_update_wmark(struct
tegra_devfreq *tegra,
device_writel(dev, lower + delta, ACTMON_DEV_LOWER_WMARK);
}
+static void actmon_device_debug(struct tegra_devfreq *tegra,
+ struct tegra_devfreq_device *dev,
+ const char *prefix)
+{
+ dev_dbg(tegra->devfreq->dev.parent,
+ "%03x: %s: 0x%08x 0x%08x a %u %u %u c %u %u %u b %lu cpu %u\n",
+ dev->config->offset, prefix,
+ device_readl(dev, ACTMON_DEV_INTR_STATUS),
+ device_readl(dev, ACTMON_DEV_CTRL),
+ device_readl(dev, ACTMON_DEV_AVG_COUNT),
+ device_readl(dev, ACTMON_DEV_AVG_LOWER_WMARK),
+ device_readl(dev, ACTMON_DEV_AVG_UPPER_WMARK),
+ device_readl(dev, ACTMON_DEV_COUNT),
+ device_readl(dev, ACTMON_DEV_LOWER_WMARK),
+ device_readl(dev, ACTMON_DEV_UPPER_WMARK),
+ dev->boost_freq, cpufreq_get(0));
+}
+
static void actmon_isr_device(struct tegra_devfreq *tegra,
struct tegra_devfreq_device *dev)
{
u32 intr_status, dev_ctrl, avg_intr_mask;
+ actmon_device_debug(tegra, dev, "isr+");
+
dev->avg_count = device_readl(dev, ACTMON_DEV_AVG_COUNT);
intr_status = device_readl(dev, ACTMON_DEV_INTR_STATUS);
dev_ctrl = device_readl(dev, ACTMON_DEV_CTRL);
@@ -422,6 +449,8 @@ static void actmon_isr_device(struct tegra_devfreq *tegra,
device_writel(dev, dev_ctrl, ACTMON_DEV_CTRL);
device_writel(dev, ACTMON_INTR_STATUS_CLEAR, ACTMON_DEV_INTR_STATUS);
+
+ actmon_device_debug(tegra, dev, "isr-");
}
static unsigned long actmon_update_target(struct tegra_devfreq *tegra,
@@ -712,6 +741,7 @@ static struct devfreq_dev_profile tegra_devfreq_profile = {
static int tegra_governor_get_target(struct devfreq *devfreq,
unsigned long *freq)
{
+ struct device *ddev = devfreq->dev.parent;
struct devfreq_dev_status *stat;
struct tegra_devfreq *tegra;
struct tegra_devfreq_device *dev;
@@ -734,6 +764,11 @@ static int tegra_governor_get_target(struct devfreq
*devfreq,
dev_target_freq = actmon_update_target(tegra, dev);
target_freq = max(target_freq, dev_target_freq);
+
+ dev_dbg(ddev, "%03x: upd: dev_target_freq %lu\n",
+ dev->config->offset, dev_target_freq);
+
+ actmon_device_debug(tegra, dev, "upd");
}
*freq = target_freq * KHZ;
--
2.22.0
