For convenience when debugging user issues show the autotuning
RPS parameters in debugfs/i915_rps_boost_info.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Rainer Hochecker <fernetmenta@xxxxxxx>
---
drivers/gpu/drm/i915/i915_debugfs.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 4ad2355f510a..d7c2064c28bd 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2340,6 +2340,16 @@ static int count_irq_waiters(struct drm_i915_private *i915)
return count;
}
+static const char *rps_power_to_str(int power)
+{
+ switch (power) {
+ default: return "unknown";
+ case LOW_POWER: return "low power";
+ case BETWEEN: return "mixed";
+ case HIGH_POWER: return "high power";
+ }
+}
+
static int i915_rps_boost_info(struct seq_file *m, void *data)
{
struct drm_info_node *node = m->private;
@@ -2377,6 +2387,27 @@ static int i915_rps_boost_info(struct seq_file *m, void *data)
spin_unlock(&dev_priv->rps.client_lock);
mutex_unlock(&dev->filelist_mutex);
+ if (INTEL_GEN(dev_priv) >= 6) {
+ u32 rpupei, rpcurup;
+ u32 rpdownei, rpcurdown;
+
+ intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
+ rpupei = I915_READ_FW(GEN6_RP_CUR_UP_EI) & GEN6_CURICONT_MASK;
+ rpcurup = I915_READ_FW(GEN6_RP_CUR_UP) & GEN6_CURBSYTAVG_MASK;
+ rpdownei = I915_READ_FW(GEN6_RP_CUR_DOWN_EI) & GEN6_CURIAVG_MASK;
+ rpcurdown = I915_READ_FW(GEN6_RP_CUR_DOWN) & GEN6_CURBSYTAVG_MASK;
+ intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+
+ seq_printf(m, "\nRPS Autotuning (current \"%s\" window):\n",
+ rps_power_to_str(dev_priv->rps.power));
+ seq_printf(m, " Avg. busy: %d%% [threshold %d%%]\n",
+ 100*rpcurup/rpupei,
+ dev_priv->rps.up_threshold);
+ seq_printf(m, " Avg. idle: %d%% [threshold %d%%]\n",
+ 100*rpcurdown/rpdownei,
+ dev_priv->rps.down_threshold);
+ }
+
return 0;
}
--
2.8.1
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