This patch exposes a new debugfs interface 'i915_rps_disable'
Following 2 values shall be echoed into this file.
'0' - RPS explicitly enabled .
'1' - RPS explicitly disabled.
This interface provides capabilty to enable/disable Turbo feature
at runtime, which is needed for its validation.
Signed-off-by: Deepak S <deepa...@intel.com>
Signed-off-by: Praveen Paneri <praveen.pan...@intel.com>
---
drivers/gpu/drm/i915/i915_debugfs.c | 55 +++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/i915_drv.h | 2 ++
2 files changed, 57 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
b/drivers/gpu/drm/i915/i915_debugfs.c
index 23a69307..9124654 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -4771,6 +4771,60 @@ DEFINE_SIMPLE_ATTRIBUTE(i915_min_freq_fops,
i915_min_freq_get, i915_min_freq_set,
"%llu\n");
+static int i915_rps_disable_get(void *data, u64 *val)
+{
+ struct drm_device *dev = data;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ if (!IS_VALLEYVIEW(dev))
+ return -ENODEV;
+
+ flush_delayed_work(&dev_priv->rps.delayed_resume_work);
+
+ *val = dev_priv->rps.rps_disable;
+
+ return 0;
+}
+
+static int i915_rps_disable_set(void *data, u64 val)
+{
+ struct drm_device *dev = data;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ int ret;
+
+ if (!IS_VALLEYVIEW(dev))
+ return -ENODEV;
+
+ flush_delayed_work(&dev_priv->rps.delayed_resume_work);
+
+ DRM_DEBUG_DRIVER("Setting RPS disable %s\n",
+ val ? "true" : "false");
+
+ ret = mutex_lock_interruptible(&dev_priv->rps.hw_lock);
+ if (ret)
+ return ret;
+
+ dev_priv->rps.rps_disable = val;
+
+ if (val)
+ I915_WRITE(GEN6_RP_CONTROL, 0);
+ else
+ I915_WRITE(GEN6_RP_CONTROL, GEN6_RP_MEDIA_TURBO |
+ GEN6_RP_MEDIA_HW_NORMAL_MODE |
+ GEN6_RP_MEDIA_IS_GFX |
+ GEN6_RP_ENABLE |
+ GEN6_RP_UP_BUSY_AVG |
+ GEN6_RP_DOWN_IDLE_CONT);
+
+ mutex_unlock(&dev_priv->rps.hw_lock);
+
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(i915_rps_disable_fops,
+ i915_rps_disable_get, i915_rps_disable_set,
+ "%llu\n");
+
static int
i915_cache_sharing_get(void *data, u64 *val)
{
@@ -5107,6 +5161,7 @@ static const struct i915_debugfs_files {
{"i915_wedged", &i915_wedged_fops},
{"i915_max_freq", &i915_max_freq_fops},
{"i915_min_freq", &i915_min_freq_fops},
+ {"i915_rps_disable", &i915_rps_disable_fops},
{"i915_cache_sharing", &i915_cache_sharing_fops},
{"i915_ring_stop", &i915_ring_stop_fops},
{"i915_ring_missed_irq", &i915_ring_missed_irq_fops},
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 04aa34a..e2a57f0 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1137,6 +1137,8 @@ struct intel_gen6_power_mgmt {
u8 up_threshold; /* Current %busy required to uplock */
u8 down_threshold; /* Current %busy required to downclock */
+ bool rps_disable;
+
int last_adj;
enum { LOW_POWER, BETWEEN, HIGH_POWER } power;
--
1.9.1
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