Merge tag 'drm-intel-next-2019-06-19' of git://anongit.freedesktop.org/drm/drm-intel into drm-next

Features:
- HDR support (Uma, Ville)
- Add I2C symlink under HDMI connector similar to DP (Oleg)
- Add ICL multi-segmented gamma support (Shashank, Uma)
- Update register whitelist support for new hardware (Robert, John)
- GuC firmware update with updated ABI interface (Michal, Oscar)
- Add support for new DMC header versions (Lucas)
- In-kernel blitter client for selftest use (Matthew)
- Add Mule Creec Canyon (MCC) PCH support to go with EHL (Matt)
- EHL platform feature updates (Matt)
- Use Command Transport Buffers with GuC on all gens (Daniele)
- New i915.force_probe module parameter to replace i915.alpha_support (Jani)

Refactoring:
- Better runtime PM code abstraction/encapsulation (Daniele)
- VBT parsing cleanup and improvements (Jani)
- Move display code to its own subdirectory (Jani)
- Header cleanup (Jani, Daniele)
- Prep work for subsclice mask expansion (Stuart)
- Use uncore mmio register accessors more, remove unused macro wrappers (Tvrtko)
- Remove unused atomic property get/set stubs (Maarten)
- GTT cleanups and improvements (Mika)
- Pass intel_ types instead of drm_ types in plenty of display code (Ville)
- Engine reset, hangcheck, fault code cleanups and improvements (Tvrtko)
- Consider AML variants simply as either KBL or CFL ULX (Ville)
- State checker cleanups and improvements (Ville)
- GEM code reorganization to more files under gem subdirectory (Chris)
- Reducing dependency on a coarse struct_mutex (Chris)

Fixes:
- Fix use of uninitialized/incorrect error pointers (Colin, Dan)
- Fix DSI fastboot on some VLV/CHV platforms (Hans)
- Fix DSI error path (Hans)
- Add ICL port A combo PHY HW state check (Imre)
- Fix ICL AUX-B HW not done issue (Imre)
- Fix perf whitelist on gen10+ (Lionel)
- Fix PSR exit by forcing manual exit on older gens (José)
- Match voltage ranges instead of exact values (Lucas)
- Fix SDVO HDMI audio, with cleanups (Ville)
- Fix plane state dumps (Ville)
- Fix driver cleanup code to support driver hot unbind (Janusz)
- Add checks for ICL memory bandwidth requirements (Ville)
- Fix toggling between no C8 planes vs. at least one C8 plane (Ville)
- Improved checks on PLL usage conditions, refactoring (Ville)
- Avoid clobbering M/N values in fastset fuzzy checks (Ville)
- Take a runtime pm wakeref for atomic commits (Chris)
- Do not allow runtime pm autosuspend to remove userspace GGTT mmaps too quickly (Chris)
- Avoid refcount_inc on known zero count to avoid debug flagging (Chris)

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/87v9x1lpdh.fsf@intel.com

1 files changed, 159 insertions, 88 deletions

diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.h b/drivers/gpu/drm/i915/intel_runtime_pm.h
index 0a4c4b3aee7d..473c4850c01d 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.h
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.h
@@ -8,12 +8,15 @@
 
 #include <linux/types.h>
 
-#include "intel_display.h"
+#include "display/intel_display.h"
+
 #include "intel_wakeref.h"
 
+#include "i915_utils.h"
+
+struct device;
 struct drm_i915_private;
 struct drm_printer;
-struct intel_encoder;
 
 enum i915_drm_suspend_mode {
 	I915_DRM_SUSPEND_IDLE,
@@ -21,122 +24,190 @@ enum i915_drm_suspend_mode {
 	I915_DRM_SUSPEND_HIBERNATE,
 };
 
-void skl_enable_dc6(struct drm_i915_private *dev_priv);
-void gen9_sanitize_dc_state(struct drm_i915_private *dev_priv);
-void bxt_enable_dc9(struct drm_i915_private *dev_priv);
-void bxt_disable_dc9(struct drm_i915_private *dev_priv);
-void gen9_enable_dc5(struct drm_i915_private *dev_priv);
-
-void intel_runtime_pm_init_early(struct drm_i915_private *dev_priv);
-int intel_power_domains_init(struct drm_i915_private *);
-void intel_power_domains_cleanup(struct drm_i915_private *dev_priv);
-void intel_power_domains_init_hw(struct drm_i915_private *dev_priv, bool resume);
-void intel_power_domains_fini_hw(struct drm_i915_private *dev_priv);
-void icl_display_core_init(struct drm_i915_private *dev_priv, bool resume);
-void icl_display_core_uninit(struct drm_i915_private *dev_priv);
-void intel_power_domains_enable(struct drm_i915_private *dev_priv);
-void intel_power_domains_disable(struct drm_i915_private *dev_priv);
-void intel_power_domains_suspend(struct drm_i915_private *dev_priv,
-				 enum i915_drm_suspend_mode);
-void intel_power_domains_resume(struct drm_i915_private *dev_priv);
-void hsw_enable_pc8(struct drm_i915_private *dev_priv);
-void hsw_disable_pc8(struct drm_i915_private *dev_priv);
-void bxt_display_core_init(struct drm_i915_private *dev_priv, bool resume);
-void bxt_display_core_uninit(struct drm_i915_private *dev_priv);
-void intel_runtime_pm_enable(struct drm_i915_private *dev_priv);
-void intel_runtime_pm_disable(struct drm_i915_private *dev_priv);
-void intel_runtime_pm_cleanup(struct drm_i915_private *dev_priv);
-
-const char *
-intel_display_power_domain_str(enum intel_display_power_domain domain);
-
-bool intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
-				    enum intel_display_power_domain domain);
-bool __intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
-				      enum intel_display_power_domain domain);
-intel_wakeref_t intel_display_power_get(struct drm_i915_private *dev_priv,
-					enum intel_display_power_domain domain);
-intel_wakeref_t
-intel_display_power_get_if_enabled(struct drm_i915_private *dev_priv,
-				   enum intel_display_power_domain domain);
-void intel_display_power_put_unchecked(struct drm_i915_private *dev_priv,
-				       enum intel_display_power_domain domain);
-void __intel_display_power_put_async(struct drm_i915_private *i915,
-				     enum intel_display_power_domain domain,
-				     intel_wakeref_t wakeref);
-void intel_display_power_flush_work(struct drm_i915_private *i915);
+/*
+ * This struct helps tracking the state needed for runtime PM, which puts the
+ * device in PCI D3 state. Notice that when this happens, nothing on the
+ * graphics device works, even register access, so we don't get interrupts nor
+ * anything else.
+ *
+ * Every piece of our code that needs to actually touch the hardware needs to
+ * either call intel_runtime_pm_get or call intel_display_power_get with the
+ * appropriate power domain.
+ *
+ * Our driver uses the autosuspend delay feature, which means we'll only really
+ * suspend if we stay with zero refcount for a certain amount of time. The
+ * default value is currently very conservative (see intel_runtime_pm_enable), but
+ * it can be changed with the standard runtime PM files from sysfs.
+ *
+ * The irqs_disabled variable becomes true exactly after we disable the IRQs and
+ * goes back to false exactly before we reenable the IRQs. We use this variable
+ * to check if someone is trying to enable/disable IRQs while they're supposed
+ * to be disabled. This shouldn't happen and we'll print some error messages in
+ * case it happens.
+ *
+ * For more, read the Documentation/power/runtime_pm.txt.
+ */
+struct intel_runtime_pm {
+	atomic_t wakeref_count;
+	struct device *kdev; /* points to i915->drm.pdev->dev */
+	bool available;
+	bool suspended;
+	bool irqs_enabled;
+
 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
-void intel_display_power_put(struct drm_i915_private *dev_priv,
-			     enum intel_display_power_domain domain,
-			     intel_wakeref_t wakeref);
+	/*
+	 * To aide detection of wakeref leaks and general misuse, we
+	 * track all wakeref holders. With manual markup (i.e. returning
+	 * a cookie to each rpm_get caller which they then supply to their
+	 * paired rpm_put) we can remove corresponding pairs of and keep
+	 * the array trimmed to active wakerefs.
+	 */
+	struct intel_runtime_pm_debug {
+		spinlock_t lock;
+
+		depot_stack_handle_t last_acquire;
+		depot_stack_handle_t last_release;
+
+		depot_stack_handle_t *owners;
+		unsigned long count;
+	} debug;
+#endif
+};
+
+#define BITS_PER_WAKEREF	\
+	BITS_PER_TYPE(struct_member(struct intel_runtime_pm, wakeref_count))
+#define INTEL_RPM_WAKELOCK_SHIFT	(BITS_PER_WAKEREF / 2)
+#define INTEL_RPM_WAKELOCK_BIAS		(1 << INTEL_RPM_WAKELOCK_SHIFT)
+#define INTEL_RPM_RAW_WAKEREF_MASK	(INTEL_RPM_WAKELOCK_BIAS - 1)
+
+static inline int
+intel_rpm_raw_wakeref_count(int wakeref_count)
+{
+	return wakeref_count & INTEL_RPM_RAW_WAKEREF_MASK;
+}
+
+static inline int
+intel_rpm_wakelock_count(int wakeref_count)
+{
+	return wakeref_count >> INTEL_RPM_WAKELOCK_SHIFT;
+}
+
 static inline void
-intel_display_power_put_async(struct drm_i915_private *i915,
-			      enum intel_display_power_domain domain,
-			      intel_wakeref_t wakeref)
+assert_rpm_device_not_suspended(struct intel_runtime_pm *rpm)
 {
-	__intel_display_power_put_async(i915, domain, wakeref);
+	WARN_ONCE(rpm->suspended,
+		  "Device suspended during HW access\n");
 }
-#else
+
 static inline void
-intel_display_power_put(struct drm_i915_private *i915,
-			enum intel_display_power_domain domain,
-			intel_wakeref_t wakeref)
+__assert_rpm_raw_wakeref_held(struct intel_runtime_pm *rpm, int wakeref_count)
 {
-	intel_display_power_put_unchecked(i915, domain);
+	assert_rpm_device_not_suspended(rpm);
+	WARN_ONCE(!intel_rpm_raw_wakeref_count(wakeref_count),
+		  "RPM raw-wakeref not held\n");
 }
 
 static inline void
-intel_display_power_put_async(struct drm_i915_private *i915,
-			      enum intel_display_power_domain domain,
-			      intel_wakeref_t wakeref)
+__assert_rpm_wakelock_held(struct intel_runtime_pm *rpm, int wakeref_count)
 {
-	__intel_display_power_put_async(i915, domain, -1);
+	__assert_rpm_raw_wakeref_held(rpm, wakeref_count);
+	WARN_ONCE(!intel_rpm_wakelock_count(wakeref_count),
+		  "RPM wakelock ref not held during HW access\n");
 }
-#endif
 
-#define with_intel_display_power(i915, domain, wf) \
-	for ((wf) = intel_display_power_get((i915), (domain)); (wf); \
-	     intel_display_power_put_async((i915), (domain), (wf)), (wf) = 0)
+static inline void
+assert_rpm_raw_wakeref_held(struct intel_runtime_pm *rpm)
+{
+	__assert_rpm_raw_wakeref_held(rpm, atomic_read(&rpm->wakeref_count));
+}
+
+static inline void
+assert_rpm_wakelock_held(struct intel_runtime_pm *rpm)
+{
+	__assert_rpm_wakelock_held(rpm, atomic_read(&rpm->wakeref_count));
+}
+
+/**
+ * disable_rpm_wakeref_asserts - disable the RPM assert checks
+ * @rpm: the intel_runtime_pm structure
+ *
+ * This function disable asserts that check if we hold an RPM wakelock
+ * reference, while keeping the device-not-suspended checks still enabled.
+ * It's meant to be used only in special circumstances where our rule about
+ * the wakelock refcount wrt. the device power state doesn't hold. According
+ * to this rule at any point where we access the HW or want to keep the HW in
+ * an active state we must hold an RPM wakelock reference acquired via one of
+ * the intel_runtime_pm_get() helpers. Currently there are a few special spots
+ * where this rule doesn't hold: the IRQ and suspend/resume handlers, the
+ * forcewake release timer, and the GPU RPS and hangcheck works. All other
+ * users should avoid using this function.
+ *
+ * Any calls to this function must have a symmetric call to
+ * enable_rpm_wakeref_asserts().
+ */
+static inline void
+disable_rpm_wakeref_asserts(struct intel_runtime_pm *rpm)
+{
+	atomic_add(INTEL_RPM_WAKELOCK_BIAS + 1,
+		   &rpm->wakeref_count);
+}
 
-void icl_dbuf_slices_update(struct drm_i915_private *dev_priv,
-			    u8 req_slices);
+/**
+ * enable_rpm_wakeref_asserts - re-enable the RPM assert checks
+ * @rpm: the intel_runtime_pm structure
+ *
+ * This function re-enables the RPM assert checks after disabling them with
+ * disable_rpm_wakeref_asserts. It's meant to be used only in special
+ * circumstances otherwise its use should be avoided.
+ *
+ * Any calls to this function must have a symmetric call to
+ * disable_rpm_wakeref_asserts().
+ */
+static inline void
+enable_rpm_wakeref_asserts(struct intel_runtime_pm *rpm)
+{
+	atomic_sub(INTEL_RPM_WAKELOCK_BIAS + 1,
+		   &rpm->wakeref_count);
+}
 
-intel_wakeref_t intel_runtime_pm_get(struct drm_i915_private *i915);
-intel_wakeref_t intel_runtime_pm_get_if_in_use(struct drm_i915_private *i915);
-intel_wakeref_t intel_runtime_pm_get_noresume(struct drm_i915_private *i915);
+void intel_runtime_pm_init_early(struct intel_runtime_pm *rpm);
+void intel_runtime_pm_enable(struct intel_runtime_pm *rpm);
+void intel_runtime_pm_disable(struct intel_runtime_pm *rpm);
+void intel_runtime_pm_cleanup(struct intel_runtime_pm *rpm);
 
-#define with_intel_runtime_pm(i915, wf) \
-	for ((wf) = intel_runtime_pm_get(i915); (wf); \
-	     intel_runtime_pm_put((i915), (wf)), (wf) = 0)
+intel_wakeref_t intel_runtime_pm_get(struct intel_runtime_pm *rpm);
+intel_wakeref_t intel_runtime_pm_get_if_in_use(struct intel_runtime_pm *rpm);
+intel_wakeref_t intel_runtime_pm_get_noresume(struct intel_runtime_pm *rpm);
+intel_wakeref_t intel_runtime_pm_get_raw(struct intel_runtime_pm *rpm);
 
-#define with_intel_runtime_pm_if_in_use(i915, wf) \
-	for ((wf) = intel_runtime_pm_get_if_in_use(i915); (wf); \
-	     intel_runtime_pm_put((i915), (wf)), (wf) = 0)
+#define with_intel_runtime_pm(rpm, wf) \
+	for ((wf) = intel_runtime_pm_get(rpm); (wf); \
+	     intel_runtime_pm_put((rpm), (wf)), (wf) = 0)
 
-void intel_runtime_pm_put_unchecked(struct drm_i915_private *i915);
+#define with_intel_runtime_pm_if_in_use(rpm, wf) \
+	for ((wf) = intel_runtime_pm_get_if_in_use(rpm); (wf); \
+	     intel_runtime_pm_put((rpm), (wf)), (wf) = 0)
+
+void intel_runtime_pm_put_unchecked(struct intel_runtime_pm *rpm);
 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
-void intel_runtime_pm_put(struct drm_i915_private *i915, intel_wakeref_t wref);
+void intel_runtime_pm_put(struct intel_runtime_pm *rpm, intel_wakeref_t wref);
 #else
 static inline void
-intel_runtime_pm_put(struct drm_i915_private *i915, intel_wakeref_t wref)
+intel_runtime_pm_put(struct intel_runtime_pm *rpm, intel_wakeref_t wref)
 {
-	intel_runtime_pm_put_unchecked(i915);
+	intel_runtime_pm_put_unchecked(rpm);
 }
 #endif
+void intel_runtime_pm_put_raw(struct intel_runtime_pm *rpm, intel_wakeref_t wref);
 
 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
-void print_intel_runtime_pm_wakeref(struct drm_i915_private *i915,
+void print_intel_runtime_pm_wakeref(struct intel_runtime_pm *rpm,
 				    struct drm_printer *p);
 #else
-static inline void print_intel_runtime_pm_wakeref(struct drm_i915_private *i915,
+static inline void print_intel_runtime_pm_wakeref(struct intel_runtime_pm *rpm,
 						  struct drm_printer *p)
 {
 }
 #endif
 
-void chv_phy_powergate_lanes(struct intel_encoder *encoder,
-			     bool override, unsigned int mask);
-bool chv_phy_powergate_ch(struct drm_i915_private *dev_priv, enum dpio_phy phy,
-			  enum dpio_channel ch, bool override);
-
 #endif /* __INTEL_RUNTIME_PM_H__ */