[0631/1094] drm/i915: add SNB runtime PM support

Commit Message

Dheeraj Jamwal Oct. 21, 2014, 10:53 a.m. UTC

From: Paulo Zanoni <[e-mail]>

Just because I have a SNB machine and I can easily test it.

Signed-off-by: Paulo Zanoni <[e-mail]>
Signed-off-by: Daniel Vetter <[e-mail]>
(cherry picked from commit 9a952a0d42ff089945ea3f5b3f690e45218d073f)

Signed-off-by: Dheeraj Jamwal <[e-mail]>
---
 drivers/gpu/drm/i915/i915_drv.c      |   27 +++++++++++++++++++++++++--
 drivers/gpu/drm/i915/i915_drv.h      |    2 +-
 drivers/gpu/drm/i915/intel_display.c |    7 +++++++
 3 files changed, 33 insertions(+), 3 deletions(-)

Patch

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index a104fe1..d248b92 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -891,6 +891,13 @@  static int i915_pm_poweroff(struct device *dev)
 	return i915_drm_freeze(drm_dev);
 }
 
+static void snb_runtime_suspend(struct drm_i915_private *dev_priv)
+{
+	struct drm_device *dev = dev_priv->dev;
+
+	intel_runtime_pm_disable_interrupts(dev);
+}
+
 static void hsw_runtime_suspend(struct drm_i915_private *dev_priv)
 {
 	struct drm_device *dev = dev_priv->dev;
@@ -899,6 +906,18 @@  static void hsw_runtime_suspend(struct drm_i915_private *dev_priv)
 		hsw_enable_pc8(dev_priv);
 }
 
+static void snb_runtime_resume(struct drm_i915_private *dev_priv)
+{
+	struct drm_device *dev = dev_priv->dev;
+
+	intel_runtime_pm_restore_interrupts(dev);
+	intel_init_pch_refclk(dev);
+	i915_gem_init_swizzling(dev);
+	mutex_lock(&dev_priv->rps.hw_lock);
+	gen6_update_ring_freq(dev);
+	mutex_unlock(&dev_priv->rps.hw_lock);
+}
+
 static void hsw_runtime_resume(struct drm_i915_private *dev_priv)
 {
 	struct drm_device *dev = dev_priv->dev;
@@ -918,7 +937,9 @@  static int intel_runtime_suspend(struct device *device)
 
 	DRM_DEBUG_KMS("Suspending device\n");
 
-	if (IS_HASWELL(dev))
+	if (IS_GEN6(dev))
+		snb_runtime_suspend(dev_priv);
+	else if (IS_HASWELL(dev))
 		hsw_runtime_suspend(dev_priv);
 
 	i915_gem_release_all_mmaps(dev_priv);
@@ -952,7 +973,9 @@  static int intel_runtime_resume(struct device *device)
 	intel_opregion_notify_adapter(dev, PCI_D0);
 	dev_priv->pm.suspended = false;
 
-	if (IS_HASWELL(dev))
+	if (IS_GEN6(dev))
+		snb_runtime_resume(dev_priv);
+	else if (IS_HASWELL(dev))
 		hsw_runtime_resume(dev_priv);
 
 	DRM_DEBUG_KMS("Device resumed\n");
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 21abec4..155faad 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1855,7 +1855,7 @@  struct drm_i915_cmd_table {
 #define HAS_FPGA_DBG_UNCLAIMED(dev)	(INTEL_INFO(dev)->has_fpga_dbg)
 #define HAS_PSR(dev)		(IS_HASWELL(dev) || IS_BROADWELL(dev))
 #define HAS_PC8(dev)		(IS_HASWELL(dev)) /* XXX HSW:ULX */
-#define HAS_RUNTIME_PM(dev)	(IS_HASWELL(dev))
+#define HAS_RUNTIME_PM(dev)	(IS_GEN6(dev) || IS_HASWELL(dev))
 
 #define INTEL_PCH_DEVICE_ID_MASK		0xff00
 #define INTEL_PCH_IBX_DEVICE_ID_TYPE		0x3b00
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index a1edd3a..fe5a5b1 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -7084,6 +7084,11 @@  void hsw_disable_pc8(struct drm_i915_private *dev_priv)
 	mutex_unlock(&dev_priv->rps.hw_lock);
 }
 
+static void snb_modeset_global_resources(struct drm_device *dev)
+{
+	modeset_update_crtc_power_domains(dev);
+}
+
 static void haswell_modeset_global_resources(struct drm_device *dev)
 {
 	modeset_update_crtc_power_domains(dev);
@@ -11050,6 +11055,8 @@  static void intel_init_display(struct drm_device *dev)
 		} else if (IS_GEN6(dev)) {
 			dev_priv->display.fdi_link_train = gen6_fdi_link_train;
 			dev_priv->display.write_eld = ironlake_write_eld;
+			dev_priv->display.modeset_global_resources =
+				snb_modeset_global_resources;
 		} else if (IS_IVYBRIDGE(dev)) {
 			/* FIXME: detect B0+ stepping and use auto training */
 			dev_priv->display.fdi_link_train = ivb_manual_fdi_link_train;