drm/i915: abstract display suspend/resume operations

Increase abstraction of display suspend/resume operations by providing
higher level functions, and hiding the details inside
intel_display_power.c.

v2: Make checkpatch happy:
    - braces {} are not necessary for single statement blocks
v3: Also move hsw/bdw PC8 sequences since they are related to
    display PM anyways. (Ville)
v4: Rebase after a long time, plus Move functions to the new
    intel_display_power so we can stop exporting platform specific
    functions as pointed by Jani.
v5: Remove unnecessary braces.
v6 by Jani: make this purely non-functional cleanup, make functions static

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190806122208.16786-2-jani.nikula@intel.com

1 files changed, 12 insertions, 46 deletions

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index ff26c4d1f20d..76ee67b90104 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -2166,7 +2166,7 @@ static int i915_drm_suspend_late(struct drm_device *dev, bool hibernation)
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	struct pci_dev *pdev = dev_priv->drm.pdev;
 	struct intel_runtime_pm *rpm = &dev_priv->runtime_pm;
-	int ret;
+	int ret = 0;
 
 	disable_rpm_wakeref_asserts(rpm);
 
@@ -2177,12 +2177,9 @@ static int i915_drm_suspend_late(struct drm_device *dev, bool hibernation)
 	intel_power_domains_suspend(dev_priv,
 				    get_suspend_mode(dev_priv, hibernation));
 
-	ret = 0;
-	if (INTEL_GEN(dev_priv) >= 11 || IS_GEN9_LP(dev_priv))
-		bxt_enable_dc9(dev_priv);
-	else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
-		hsw_enable_pc8(dev_priv);
-	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+	intel_display_power_suspend_late(dev_priv);
+
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
 		ret = vlv_suspend_complete(dev_priv);
 
 	if (ret) {
@@ -2367,12 +2364,7 @@ static int i915_drm_resume_early(struct drm_device *dev)
 
 	intel_gt_check_and_clear_faults(&dev_priv->gt);
 
-	if (INTEL_GEN(dev_priv) >= 11 || IS_GEN9_LP(dev_priv)) {
-		gen9_sanitize_dc_state(dev_priv);
-		bxt_disable_dc9(dev_priv);
-	} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
-		hsw_disable_pc8(dev_priv);
-	}
+	intel_display_power_resume_early(dev_priv);
 
 	intel_sanitize_gt_powersave(dev_priv);
 
@@ -2912,7 +2904,7 @@ static int intel_runtime_suspend(struct device *kdev)
 {
 	struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
 	struct intel_runtime_pm *rpm = &dev_priv->runtime_pm;
-	int ret;
+	int ret = 0;
 
 	if (WARN_ON_ONCE(!(dev_priv->gt_pm.rc6.enabled && HAS_RC6(dev_priv))))
 		return -ENODEV;
@@ -2936,18 +2928,10 @@ static int intel_runtime_suspend(struct device *kdev)
 
 	intel_uncore_suspend(&dev_priv->uncore);
 
-	ret = 0;
-	if (INTEL_GEN(dev_priv) >= 11) {
-		icl_display_core_uninit(dev_priv);
-		bxt_enable_dc9(dev_priv);
-	} else if (IS_GEN9_LP(dev_priv)) {
-		bxt_display_core_uninit(dev_priv);
-		bxt_enable_dc9(dev_priv);
-	} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
-		hsw_enable_pc8(dev_priv);
-	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
+	intel_display_power_suspend(dev_priv);
+
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
 		ret = vlv_suspend_complete(dev_priv);
-	}
 
 	if (ret) {
 		DRM_ERROR("Runtime suspend failed, disabling it (%d)\n", ret);
@@ -3023,28 +3007,10 @@ static int intel_runtime_resume(struct device *kdev)
 	if (intel_uncore_unclaimed_mmio(&dev_priv->uncore))
 		DRM_DEBUG_DRIVER("Unclaimed access during suspend, bios?\n");
 
-	if (INTEL_GEN(dev_priv) >= 11) {
-		bxt_disable_dc9(dev_priv);
-		icl_display_core_init(dev_priv, true);
-		if (dev_priv->csr.dmc_payload) {
-			if (dev_priv->csr.allowed_dc_mask &
-			    DC_STATE_EN_UPTO_DC6)
-				skl_enable_dc6(dev_priv);
-			else if (dev_priv->csr.allowed_dc_mask &
-				 DC_STATE_EN_UPTO_DC5)
-				gen9_enable_dc5(dev_priv);
-		}
-	} else if (IS_GEN9_LP(dev_priv)) {
-		bxt_disable_dc9(dev_priv);
-		bxt_display_core_init(dev_priv, true);
-		if (dev_priv->csr.dmc_payload &&
-		    (dev_priv->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC5))
-			gen9_enable_dc5(dev_priv);
-	} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
-		hsw_disable_pc8(dev_priv);
-	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
+	intel_display_power_resume(dev_priv);
+
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
 		ret = vlv_resume_prepare(dev_priv, true);
-	}
 
 	intel_uncore_runtime_resume(&dev_priv->uncore);