[v2,01/11] drm/i915: Separate RPS and RC6 handling for gen6+

Commit Message

[e-mail] Oct. 6, 2017, 12:13 p.m. UTC

This patch separates enable/disable of RC6 and RPS for gen6+
platforms prior to VLV.

Signed-off-by: Sagar Arun Kamble <[e-mail]>
Cc: Imre Deak <[e-mail]>
Cc: Chris Wilson <[e-mail]>
Cc: Joonas Lahtinen <[e-mail]>
Reviewed-by: Radoslaw Szwichtenberg <[e-mail]>
Reviewed-by: Chris Wilson <[e-mail]>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 17 +++++++-------
 drivers/gpu/drm/i915/intel_pm.c     | 44 +++++++++++++++++++++++++------------
 2 files changed, 38 insertions(+), 23 deletions(-)

Patch

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 44aae25..ca65600 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1137,6 +1137,13 @@  static int i915_frequency_info(struct seq_file *m, void *unused)
 			pm_iir = I915_READ(GEN8_GT_IIR(2));
 			pm_mask = I915_READ(GEN6_PMINTRMSK);
 		}
+		seq_printf(m, "Video Turbo Mode: %s\n",
+			   yesno(rpmodectl & GEN6_RP_MEDIA_TURBO));
+		seq_printf(m, "HW control enabled: %s\n",
+			   yesno(rpmodectl & GEN6_RP_ENABLE));
+		seq_printf(m, "SW control enabled: %s\n",
+			   yesno((rpmodectl & GEN6_RP_MEDIA_MODE_MASK) ==
+				  GEN6_RP_MEDIA_SW_MODE));
 		seq_printf(m, "PM IER=0x%08x IMR=0x%08x ISR=0x%08x IIR=0x%08x, MASK=0x%08x\n",
 			   pm_ier, pm_imr, pm_isr, pm_iir, pm_mask);
 		seq_printf(m, "pm_intrmsk_mbz: 0x%08x\n",
@@ -1480,7 +1487,7 @@  static int vlv_drpc_info(struct seq_file *m)
 static int gen6_drpc_info(struct seq_file *m)
 {
 	struct drm_i915_private *dev_priv = node_to_i915(m->private);
-	u32 rpmodectl1, gt_core_status, rcctl1, rc6vids = 0;
+	u32 gt_core_status, rcctl1, rc6vids = 0;
 	u32 gen9_powergate_enable = 0, gen9_powergate_status = 0;
 	unsigned forcewake_count;
 	int count = 0;
@@ -1499,7 +1506,6 @@  static int gen6_drpc_info(struct seq_file *m)
 	gt_core_status = I915_READ_FW(GEN6_GT_CORE_STATUS);
 	trace_i915_reg_rw(false, GEN6_GT_CORE_STATUS, gt_core_status, 4, true);
 
-	rpmodectl1 = I915_READ(GEN6_RP_CONTROL);
 	rcctl1 = I915_READ(GEN6_RC_CONTROL);
 	if (INTEL_GEN(dev_priv) >= 9) {
 		gen9_powergate_enable = I915_READ(GEN9_PG_ENABLE);
@@ -1510,13 +1516,6 @@  static int gen6_drpc_info(struct seq_file *m)
 	sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids);
 	mutex_unlock(&dev_priv->rps.hw_lock);
 
-	seq_printf(m, "Video Turbo Mode: %s\n",
-		   yesno(rpmodectl1 & GEN6_RP_MEDIA_TURBO));
-	seq_printf(m, "HW control enabled: %s\n",
-		   yesno(rpmodectl1 & GEN6_RP_ENABLE));
-	seq_printf(m, "SW control enabled: %s\n",
-		   yesno((rpmodectl1 & GEN6_RP_MEDIA_MODE_MASK) ==
-			  GEN6_RP_MEDIA_SW_MODE));
 	seq_printf(m, "RC1e Enabled: %s\n",
 		   yesno(rcctl1 & GEN6_RC_CTL_RC1e_ENABLE));
 	seq_printf(m, "RC6 Enabled: %s\n",
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 171b21f..f118764 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -6332,9 +6332,13 @@  static void gen9_disable_rps(struct drm_i915_private *dev_priv)
 	I915_WRITE(GEN6_RP_CONTROL, 0);
 }
 
-static void gen6_disable_rps(struct drm_i915_private *dev_priv)
+static void gen6_disable_rc6(struct drm_i915_private *dev_priv)
 {
 	I915_WRITE(GEN6_RC_CONTROL, 0);
+}
+
+static void gen6_disable_rps(struct drm_i915_private *dev_priv)
+{
 	I915_WRITE(GEN6_RPNSWREQ, 1 << 31);
 	I915_WRITE(GEN6_RP_CONTROL, 0);
 }
@@ -6692,7 +6696,7 @@  static void gen8_enable_rps(struct drm_i915_private *dev_priv)
 	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
 }
 
-static void gen6_enable_rps(struct drm_i915_private *dev_priv)
+static void gen6_enable_rc6(struct drm_i915_private *dev_priv)
 {
 	struct intel_engine_cs *engine;
 	enum intel_engine_id id;
@@ -6703,12 +6707,6 @@  static void gen6_enable_rps(struct drm_i915_private *dev_priv)
 
 	WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
 
-	/* Here begins a magic sequence of register writes to enable
-	 * auto-downclocking.
-	 *
-	 * Perhaps there might be some value in exposing these to
-	 * userspace...
-	 */
 	I915_WRITE(GEN6_RC_STATE, 0);
 
 	/* Clear the DBG now so we don't confuse earlier errors */
@@ -6762,12 +6760,6 @@  static void gen6_enable_rps(struct drm_i915_private *dev_priv)
 		   GEN6_RC_CTL_EI_MODE(1) |
 		   GEN6_RC_CTL_HW_ENABLE);
 
-	/* Power down if completely idle for over 50ms */
-	I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 50000);
-	I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
-
-	reset_rps(dev_priv, gen6_set_rps);
-
 	rc6vids = 0;
 	ret = sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids);
 	if (IS_GEN6(dev_priv) && ret) {
@@ -6785,6 +6777,28 @@  static void gen6_enable_rps(struct drm_i915_private *dev_priv)
 	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
 }
 
+
+static void gen6_enable_rps(struct drm_i915_private *dev_priv)
+{
+	WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
+
+	/* Here begins a magic sequence of register writes to enable
+	 * auto-downclocking.
+	 *
+	 * Perhaps there might be some value in exposing these to
+	 * userspace...
+	 */
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
+
+	/* Power down if completely idle for over 50ms */
+	I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 50000);
+	I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
+
+	reset_rps(dev_priv, gen6_set_rps);
+
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+}
+
 static void gen6_update_ring_freq(struct drm_i915_private *dev_priv)
 {
 	int min_freq = 15;
@@ -7934,6 +7948,7 @@  void intel_disable_gt_powersave(struct drm_i915_private *dev_priv)
 	} else if (IS_VALLEYVIEW(dev_priv)) {
 		valleyview_disable_rps(dev_priv);
 	} else if (INTEL_GEN(dev_priv) >= 6) {
+		gen6_disable_rc6(dev_priv);
 		gen6_disable_rps(dev_priv);
 	}  else if (IS_IRONLAKE_M(dev_priv)) {
 		ironlake_disable_drps(dev_priv);
@@ -7970,6 +7985,7 @@  void intel_enable_gt_powersave(struct drm_i915_private *dev_priv)
 		gen8_enable_rps(dev_priv);
 		gen6_update_ring_freq(dev_priv);
 	} else if (INTEL_GEN(dev_priv) >= 6) {
+		gen6_enable_rc6(dev_priv);
 		gen6_enable_rps(dev_priv);
 		gen6_update_ring_freq(dev_priv);
 	} else if (IS_IRONLAKE_M(dev_priv)) {