[3/7] drm/i915: #define gpu freq multipler

Commit Message

Ben Widawsky Sept. 6, 2012, 8:54 p.m. UTC

Magic numbers are bad mmmkay. In this case in particular the value is
especially weird because the docs say multiple things. We'll need this
value for sysfs, so extracting it is useful for that as well.

CC: Jesse Barnes <[e-mail]>
Signed-off-by: Ben Widawsky <[e-mail]>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 22 +++++++++++-----------
 drivers/gpu/drm/i915/i915_drv.h     |  2 ++
 2 files changed, 13 insertions(+), 11 deletions(-)

Comments

Jesse Barnes Sept. 6, 2012, 9:45 p.m. UTC | #1

On Thu,  6 Sep 2012 13:54:06 -0700
Ben Widawsky <[e-mail]> wrote:

> Magic numbers are bad mmmkay. In this case in particular the value is
> especially weird because the docs say multiple things. We'll need this
> value for sysfs, so extracting it is useful for that as well.

Reviewed-by: Jesse Barnes <[e-mail]>

Patch

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 3d886af..73d1f98 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -930,7 +930,7 @@  static int i915_cur_delayinfo(struct seq_file *m, void *unused)
 		seq_printf(m, "Render p-state limit: %d\n",
 			   rp_state_limits & 0xff);
 		seq_printf(m, "CAGF: %dMHz\n", ((rpstat & GEN6_CAGF_MASK) >>
-						GEN6_CAGF_SHIFT) * 50);
+						GEN6_CAGF_SHIFT) * GT_FREQUENCY_MULTIPLIER);
 		seq_printf(m, "RP CUR UP EI: %dus\n", rpupei &
 			   GEN6_CURICONT_MASK);
 		seq_printf(m, "RP CUR UP: %dus\n", rpcurup &
@@ -946,15 +946,15 @@  static int i915_cur_delayinfo(struct seq_file *m, void *unused)
 
 		max_freq = (rp_state_cap & 0xff0000) >> 16;
 		seq_printf(m, "Lowest (RPN) frequency: %dMHz\n",
-			   max_freq * 50);
+			   max_freq * GT_FREQUENCY_MULTIPLIER);
 
 		max_freq = (rp_state_cap & 0xff00) >> 8;
 		seq_printf(m, "Nominal (RP1) frequency: %dMHz\n",
-			   max_freq * 50);
+			   max_freq * GT_FREQUENCY_MULTIPLIER);
 
 		max_freq = rp_state_cap & 0xff;
 		seq_printf(m, "Max non-overclocked (RP0) frequency: %dMHz\n",
-			   max_freq * 50);
+			   max_freq * GT_FREQUENCY_MULTIPLIER);
 	} else {
 		seq_printf(m, "no P-state info available\n");
 	}
@@ -1308,7 +1308,7 @@  static int i915_ring_freq_table(struct seq_file *m, void *unused)
 			continue;
 		}
 		ia_freq = I915_READ(GEN6_PCODE_DATA);
-		seq_printf(m, "%d\t\t%d\n", gpu_freq * 50, ia_freq * 100);
+		seq_printf(m, "%d\t\t%d\n", gpu_freq * GT_FREQUENCY_MULTIPLIER, ia_freq * 100);
 	}
 
 	mutex_unlock(&dev->struct_mutex);
@@ -1735,7 +1735,7 @@  i915_max_freq_read(struct file *filp,
 		return ret;
 
 	len = snprintf(buf, sizeof(buf),
-		       "max freq: %d\n", dev_priv->rps.max_delay * 50);
+		       "max freq: %d\n", dev_priv->rps.max_delay * GT_FREQUENCY_MULTIPLIER);
 	mutex_unlock(&dev->struct_mutex);
 
 	if (len > sizeof(buf))
@@ -1778,9 +1778,9 @@  i915_max_freq_write(struct file *filp,
 	/*
 	 * Turbo will still be enabled, but won't go above the set value.
 	 */
-	dev_priv->rps.max_delay = val / 50;
+	dev_priv->rps.max_delay = val / GT_FREQUENCY_MULTIPLIER;
 
-	gen6_set_rps(dev, val / 50);
+	gen6_set_rps(dev, val / GT_FREQUENCY_MULTIPLIER);
 	mutex_unlock(&dev->struct_mutex);
 
 	return cnt;
@@ -1811,7 +1811,7 @@  i915_min_freq_read(struct file *filp, char __user *ubuf, size_t max,
 		return ret;
 
 	len = snprintf(buf, sizeof(buf),
-		       "min freq: %d\n", dev_priv->rps.min_delay * 50);
+		       "min freq: %d\n", dev_priv->rps.min_delay * GT_FREQUENCY_MULTIPLIER);
 	mutex_unlock(&dev->struct_mutex);
 
 	if (len > sizeof(buf))
@@ -1852,9 +1852,9 @@  i915_min_freq_write(struct file *filp, const char __user *ubuf, size_t cnt,
 	/*
 	 * Turbo will still be enabled, but won't go below the set value.
 	 */
-	dev_priv->rps.min_delay = val / 50;
+	dev_priv->rps.min_delay = val / GT_FREQUENCY_MULTIPLIER;
 
-	gen6_set_rps(dev, val / 50);
+	gen6_set_rps(dev, val / GT_FREQUENCY_MULTIPLIER);
 	mutex_unlock(&dev->struct_mutex);
 
 	return cnt;
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index f16ab5e..51af543 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1162,6 +1162,8 @@  struct drm_i915_file_private {
 
 #define HAS_L3_GPU_CACHE(dev) (IS_IVYBRIDGE(dev) || IS_HASWELL(dev))
 
+#define GT_FREQUENCY_MULTIPLIER 50
+
 #include "i915_trace.h"
 
 /**