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Subject[PATCH v1 10/11] PM / devfreq: tegra30: Add debug messages
Date
Add debug messages to know about what's happening in hardware and how
driver reacts.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/devfreq/tegra30-devfreq.c | 33 +++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)

diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c
index 168bfe78e525..452bc10d2d72 100644
--- a/drivers/devfreq/tegra30-devfreq.c
+++ b/drivers/devfreq/tegra30-devfreq.c
@@ -277,6 +277,8 @@ 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;
unsigned long target_freq, min;

target_freq = count / ACTMON_SAMPLING_PERIOD * KHZ;
@@ -312,6 +314,9 @@ static void tegra_actmon_get_lower_upper(struct tegra_devfreq *tegra,
else
*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;

@@ -384,12 +389,32 @@ static void tegra_devfreq_update_wmark(struct tegra_devfreq *tegra,
device_writel(dev, count + delta, ACTMON_DEV_UPPER_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;
bool low_activity = true;

+ 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);
@@ -451,6 +476,8 @@ 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,
@@ -737,6 +764,7 @@ 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;
@@ -759,6 +787,11 @@ 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
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