[Intel-gfx] [PATCH] drm/i915: Index the ring frequency table by HW frequency range

[Chris Wilson]

When reporting the frequency table stored in the punit, report the full
range and not just the user restricted frequency range. In the process
keep the code to set the frequency table and read it the same.

References: f936ec34dea8 ("drm/i915/skl: Updated the i915_ring_freq_table debugfs function")
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala at intel.com>
---
v2: Typos.
---
 drivers/gpu/drm/i915/i915_debugfs.c | 23 ++++++++++-------------
 drivers/gpu/drm/i915/intel_pm.c     |  9 ++++-----
 2 files changed, 14 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index e838c765b251..b7723595ae10 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1796,30 +1796,28 @@ static int i915_ring_freq_table(struct seq_file *m, void *unused)
 {
 	struct drm_i915_private *dev_priv = node_to_i915(m->private);
 	struct intel_rps *rps = &dev_priv->gt_pm.rps;
-	int ret = 0;
-	int gpu_freq, ia_freq;
 	unsigned int max_gpu_freq, min_gpu_freq;
+	int gpu_freq, ia_freq;
+	int ret;
 
 	if (!HAS_LLC(dev_priv))
 		return -ENODEV;
 
-	intel_runtime_pm_get(dev_priv);
-
 	ret = mutex_lock_interruptible(&dev_priv->pcu_lock);
 	if (ret)
-		goto out;
+		return ret;
 
+	min_gpu_freq = rps->min_freq;
+	max_gpu_freq = rps->max_freq;
 	if (IS_GEN9_BC(dev_priv) || IS_CANNONLAKE(dev_priv)) {
 		/* Convert GT frequency to 50 HZ units */
-		min_gpu_freq = rps->min_freq_softlimit / GEN9_FREQ_SCALER;
-		max_gpu_freq = rps->max_freq_softlimit / GEN9_FREQ_SCALER;
-	} else {
-		min_gpu_freq = rps->min_freq_softlimit;
-		max_gpu_freq = rps->max_freq_softlimit;
+		min_gpu_freq /= GEN9_FREQ_SCALER;
+		max_gpu_freq /= GEN9_FREQ_SCALER;
 	}
 
 	seq_puts(m, "GPU freq (MHz)\tEffective CPU freq (MHz)\tEffective Ring freq (MHz)\n");
 
+	intel_runtime_pm_get(dev_priv);
 	for (gpu_freq = min_gpu_freq; gpu_freq <= max_gpu_freq; gpu_freq++) {
 		ia_freq = gpu_freq;
 		sandybridge_pcode_read(dev_priv,
@@ -1833,12 +1831,11 @@ static int i915_ring_freq_table(struct seq_file *m, void *unused)
 			   ((ia_freq >> 0) & 0xff) * 100,
 			   ((ia_freq >> 8) & 0xff) * 100);
 	}
+	intel_runtime_pm_put(dev_priv);
 
 	mutex_unlock(&dev_priv->pcu_lock);
 
-out:
-	intel_runtime_pm_put(dev_priv);
-	return ret;
+	return 0;
 }
 
 static int i915_opregion(struct seq_file *m, void *unused)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index b8da4dcdd584..dd5ddb77b306 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -6918,13 +6918,12 @@ static void gen6_update_ring_freq(struct drm_i915_private *dev_priv)
 	/* convert DDR frequency from units of 266.6MHz to bandwidth */
 	min_ring_freq = mult_frac(min_ring_freq, 8, 3);
 
+	min_gpu_freq = rps->min_freq;
+	max_gpu_freq = rps->max_freq;
 	if (IS_GEN9_BC(dev_priv) || IS_CANNONLAKE(dev_priv)) {
 		/* Convert GT frequency to 50 HZ units */
-		min_gpu_freq = rps->min_freq / GEN9_FREQ_SCALER;
-		max_gpu_freq = rps->max_freq / GEN9_FREQ_SCALER;
-	} else {
-		min_gpu_freq = rps->min_freq;
-		max_gpu_freq = rps->max_freq;
+		min_gpu_freq /= GEN9_FREQ_SCALER;
+		max_gpu_freq /= GEN9_FREQ_SCALER;
 	}
 
 	/*
-- 
2.16.2