diff mbox

[13/27] drm/i915/icl: Gen11 forcewake support

Message ID 20180109232835.11478-4-paulo.r.zanoni@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Zanoni, Paulo R Jan. 9, 2018, 11:28 p.m. UTC 
From: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>

The main difference with previous GENs is that starting from Gen11
each VCS and VECS engine has its own power well, which only exist
if the related engine exists in the HW.
The fallback forcewake request workaround is only needed on gen9
according to the HSDES WA entry (1604254524), so we can go back to using
the simpler fw_domains_get/put functions.

BSpec: 18331

v2: fix fwtable, use array to test shadow tables, create new
    accessors to avoid check on every access (Tvrtko)
v3 (from Paulo): Rebase.
v4:
  - Range 09400-097FF should be FORCEWAKE_ALL (Daniele)
  - Use the BIT macro for forcewake domains (Daniele)
  - Add a comment about the range ordering (Oscar)
  - Updated commit message (Oscar)
v5: Rebased
v6: Use I915_MAX_VCS/VECS (Michal)
v7: translate FORCEWAKE_ALL to available domains
v8: rebase, add clarification on fallback ack in commit message.
v9: fix rebase issue, change check in fw_domains_init from IS_GEN11
    to GEN >= 11

Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Acked-by: Michel Thierry <michel.thierry@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h               |   4 +
 drivers/gpu/drm/i915/intel_uncore.c           | 148 +++++++++++++++++++++++++-
 drivers/gpu/drm/i915/intel_uncore.h           |  27 ++++-
 drivers/gpu/drm/i915/selftests/intel_uncore.c |  30 ++++--
 4 files changed, 191 insertions(+), 18 deletions(-)
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index f843ac205313..f383ee5cc592 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7895,9 +7895,13 @@  enum {
 #define   VLV_GTLC_PW_RENDER_STATUS_MASK	(1 << 7)
 #define  FORCEWAKE_MT				_MMIO(0xa188) /* multi-threaded */
 #define  FORCEWAKE_MEDIA_GEN9			_MMIO(0xa270)
+#define  FORCEWAKE_MEDIA_VDBOX_GEN11(n)		_MMIO(0xa540 + (n) * 4)
+#define  FORCEWAKE_MEDIA_VEBOX_GEN11(n)		_MMIO(0xa560 + (n) * 4)
 #define  FORCEWAKE_RENDER_GEN9			_MMIO(0xa278)
 #define  FORCEWAKE_BLITTER_GEN9			_MMIO(0xa188)
 #define  FORCEWAKE_ACK_MEDIA_GEN9		_MMIO(0x0D88)
+#define  FORCEWAKE_ACK_MEDIA_VDBOX_GEN11(n)	_MMIO(0x0D50 + (n) * 4)
+#define  FORCEWAKE_ACK_MEDIA_VEBOX_GEN11(n)	_MMIO(0x0D70 + (n) * 4)
 #define  FORCEWAKE_ACK_RENDER_GEN9		_MMIO(0x0D84)
 #define  FORCEWAKE_ACK_BLITTER_GEN9		_MMIO(0x130044)
 #define   FORCEWAKE_KERNEL			BIT(0)
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index 1c524ed1e1da..44f0c5ab58e3 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -37,6 +37,12 @@  static const char * const forcewake_domain_names[] = {
 	"render",
 	"blitter",
 	"media",
+	"vdbox0",
+	"vdbox1",
+	"vdbox2",
+	"vdbox3",
+	"vebox0",
+	"vebox1",
 };
 
 const char *
@@ -773,6 +779,8 @@  void assert_forcewakes_active(struct drm_i915_private *dev_priv,
 
 /* We give fast paths for the really cool registers */
 #define NEEDS_FORCE_WAKE(reg) ((reg) < 0x40000)
+#define GEN11_NEEDS_FORCE_WAKE(reg) \
+	((reg) < 0x40000 || ((reg) >= 0x1c0000 && (reg) < 0x1dc000))
 
 #define __gen6_reg_read_fw_domains(offset) \
 ({ \
@@ -826,6 +834,14 @@  find_fw_domain(struct drm_i915_private *dev_priv, u32 offset)
 	if (!entry)
 		return 0;
 
+	/*
+	 * The list of FW domains depends on the SKU in gen11+ so we
+	 * can't determine it statically. We use FORCEWAKE_ALL and
+	 * translate it here to the list of available domains.
+	 */
+	if (entry->domains == FORCEWAKE_ALL)
+		return dev_priv->uncore.fw_domains;
+
 	WARN(entry->domains & ~dev_priv->uncore.fw_domains,
 	     "Uninitialized forcewake domain(s) 0x%x accessed at 0x%x\n",
 	     entry->domains & ~dev_priv->uncore.fw_domains, offset);
@@ -860,6 +876,14 @@  static const struct intel_forcewake_range __vlv_fw_ranges[] = {
 	__fwd; \
 })
 
+#define __gen11_fwtable_reg_read_fw_domains(offset) \
+({ \
+	enum forcewake_domains __fwd = 0; \
+	if (GEN11_NEEDS_FORCE_WAKE((offset))) \
+		__fwd = find_fw_domain(dev_priv, offset); \
+	__fwd; \
+})
+
 /* *Must* be sorted by offset! See intel_shadow_table_check(). */
 static const i915_reg_t gen8_shadowed_regs[] = {
 	RING_TAIL(RENDER_RING_BASE),	/* 0x2000 (base) */
@@ -871,6 +895,20 @@  static const i915_reg_t gen8_shadowed_regs[] = {
 	/* TODO: Other registers are not yet used */
 };
 
+static const i915_reg_t gen11_shadowed_regs[] = {
+	RING_TAIL(RENDER_RING_BASE),		/* 0x2000 (base) */
+	GEN6_RPNSWREQ,				/* 0xA008 */
+	GEN6_RC_VIDEO_FREQ,			/* 0xA00C */
+	RING_TAIL(BLT_RING_BASE),		/* 0x22000 (base) */
+	RING_TAIL(GEN11_BSD_RING_BASE),		/* 0x1C0000 (base) */
+	RING_TAIL(GEN11_BSD2_RING_BASE),	/* 0x1C4000 (base) */
+	RING_TAIL(GEN11_VEBOX_RING_BASE),	/* 0x1C8000 (base) */
+	RING_TAIL(GEN11_BSD3_RING_BASE),	/* 0x1D0000 (base) */
+	RING_TAIL(GEN11_BSD4_RING_BASE),	/* 0x1D4000 (base) */
+	RING_TAIL(GEN11_VEBOX2_RING_BASE),	/* 0x1D8000 (base) */
+	/* TODO: Other registers are not yet used */
+};
+
 static int mmio_reg_cmp(u32 key, const i915_reg_t *reg)
 {
 	u32 offset = i915_mmio_reg_offset(*reg);
@@ -891,6 +929,14 @@  static bool is_gen8_shadowed(u32 offset)
 		       mmio_reg_cmp);
 }
 
+static bool is_gen11_shadowed(u32 offset)
+{
+	const i915_reg_t *regs = gen11_shadowed_regs;
+
+	return BSEARCH(offset, regs, ARRAY_SIZE(gen11_shadowed_regs),
+		       mmio_reg_cmp);
+}
+
 #define __gen8_reg_write_fw_domains(offset) \
 ({ \
 	enum forcewake_domains __fwd; \
@@ -929,6 +975,14 @@  static const struct intel_forcewake_range __chv_fw_ranges[] = {
 	__fwd; \
 })
 
+#define __gen11_fwtable_reg_write_fw_domains(offset) \
+({ \
+	enum forcewake_domains __fwd = 0; \
+	if (GEN11_NEEDS_FORCE_WAKE((offset)) && !is_gen11_shadowed(offset)) \
+		__fwd = find_fw_domain(dev_priv, offset); \
+	__fwd; \
+})
+
 /* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
 static const struct intel_forcewake_range __gen9_fw_ranges[] = {
 	GEN_FW_RANGE(0x0, 0xaff, FORCEWAKE_BLITTER),
@@ -965,6 +1019,40 @@  static const struct intel_forcewake_range __gen9_fw_ranges[] = {
 	GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_MEDIA),
 };
 
+/* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
+static const struct intel_forcewake_range __gen11_fw_ranges[] = {
+	GEN_FW_RANGE(0x0, 0xaff, FORCEWAKE_BLITTER),
+	GEN_FW_RANGE(0xb00, 0x1fff, 0), /* uncore range */
+	GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
+	GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_BLITTER),
+	GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
+	GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_BLITTER),
+	GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
+	GEN_FW_RANGE(0x8000, 0x813f, FORCEWAKE_BLITTER),
+	GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
+	GEN_FW_RANGE(0x8160, 0x82ff, FORCEWAKE_BLITTER),
+	GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
+	GEN_FW_RANGE(0x8500, 0x8bff, FORCEWAKE_BLITTER),
+	GEN_FW_RANGE(0x8c00, 0x8cff, FORCEWAKE_RENDER),
+	GEN_FW_RANGE(0x8d00, 0x93ff, FORCEWAKE_BLITTER),
+	GEN_FW_RANGE(0x9400, 0x97ff, FORCEWAKE_ALL),
+	GEN_FW_RANGE(0x9800, 0xafff, FORCEWAKE_BLITTER),
+	GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
+	GEN_FW_RANGE(0xb480, 0xdfff, FORCEWAKE_BLITTER),
+	GEN_FW_RANGE(0xe000, 0xe8ff, FORCEWAKE_RENDER),
+	GEN_FW_RANGE(0xe900, 0x243ff, FORCEWAKE_BLITTER),
+	GEN_FW_RANGE(0x24400, 0x247ff, FORCEWAKE_RENDER),
+	GEN_FW_RANGE(0x24800, 0x3ffff, FORCEWAKE_BLITTER),
+	GEN_FW_RANGE(0x40000, 0x1bffff, 0),
+	GEN_FW_RANGE(0x1c0000, 0x1c3fff, FORCEWAKE_MEDIA_VDBOX0),
+	GEN_FW_RANGE(0x1c4000, 0x1c7fff, FORCEWAKE_MEDIA_VDBOX1),
+	GEN_FW_RANGE(0x1c8000, 0x1cbfff, FORCEWAKE_MEDIA_VEBOX0),
+	GEN_FW_RANGE(0x1cc000, 0x1cffff, FORCEWAKE_BLITTER),
+	GEN_FW_RANGE(0x1d0000, 0x1d3fff, FORCEWAKE_MEDIA_VDBOX2),
+	GEN_FW_RANGE(0x1d4000, 0x1d7fff, FORCEWAKE_MEDIA_VDBOX3),
+	GEN_FW_RANGE(0x1d8000, 0x1dbfff, FORCEWAKE_MEDIA_VEBOX1)
+};
+
 static void
 ilk_dummy_write(struct drm_i915_private *dev_priv)
 {
@@ -1095,7 +1183,12 @@  func##_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) {
 }
 #define __gen6_read(x) __gen_read(gen6, x)
 #define __fwtable_read(x) __gen_read(fwtable, x)
+#define __gen11_fwtable_read(x) __gen_read(gen11_fwtable, x)
 
+__gen11_fwtable_read(8)
+__gen11_fwtable_read(16)
+__gen11_fwtable_read(32)
+__gen11_fwtable_read(64)
 __fwtable_read(8)
 __fwtable_read(16)
 __fwtable_read(32)
@@ -1105,6 +1198,7 @@  __gen6_read(16)
 __gen6_read(32)
 __gen6_read(64)
 
+#undef __gen11_fwtable_read
 #undef __fwtable_read
 #undef __gen6_read
 #undef GEN6_READ_FOOTER
@@ -1181,7 +1275,11 @@  func##_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, boo
 }
 #define __gen8_write(x) __gen_write(gen8, x)
 #define __fwtable_write(x) __gen_write(fwtable, x)
+#define __gen11_fwtable_write(x) __gen_write(gen11_fwtable, x)
 
+__gen11_fwtable_write(8)
+__gen11_fwtable_write(16)
+__gen11_fwtable_write(32)
 __fwtable_write(8)
 __fwtable_write(16)
 __fwtable_write(32)
@@ -1192,6 +1290,7 @@  __gen6_write(8)
 __gen6_write(16)
 __gen6_write(32)
 
+#undef __gen11_fwtable_write
 #undef __fwtable_write
 #undef __gen8_write
 #undef __gen6_write
@@ -1240,6 +1339,13 @@  static void fw_domain_init(struct drm_i915_private *dev_priv,
 	BUILD_BUG_ON(FORCEWAKE_RENDER != (1 << FW_DOMAIN_ID_RENDER));
 	BUILD_BUG_ON(FORCEWAKE_BLITTER != (1 << FW_DOMAIN_ID_BLITTER));
 	BUILD_BUG_ON(FORCEWAKE_MEDIA != (1 << FW_DOMAIN_ID_MEDIA));
+	BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX0 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX0));
+	BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX1 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX1));
+	BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX2 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX2));
+	BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX3 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX3));
+	BUILD_BUG_ON(FORCEWAKE_MEDIA_VEBOX0 != (1 << FW_DOMAIN_ID_MEDIA_VEBOX0));
+	BUILD_BUG_ON(FORCEWAKE_MEDIA_VEBOX1 != (1 << FW_DOMAIN_ID_MEDIA_VEBOX1));
+
 
 	d->mask = BIT(domain_id);
 
@@ -1267,7 +1373,33 @@  static void intel_uncore_fw_domains_init(struct drm_i915_private *dev_priv)
 		dev_priv->uncore.fw_clear = _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL);
 	}
 
-	if (INTEL_GEN(dev_priv) >= 9) {
+	if (INTEL_GEN(dev_priv) >= 11) {
+		int i;
+		dev_priv->uncore.funcs.force_wake_get = fw_domains_get;
+		dev_priv->uncore.funcs.force_wake_put = fw_domains_put;
+		fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
+			       FORCEWAKE_RENDER_GEN9,
+			       FORCEWAKE_ACK_RENDER_GEN9);
+		fw_domain_init(dev_priv, FW_DOMAIN_ID_BLITTER,
+			       FORCEWAKE_BLITTER_GEN9,
+			       FORCEWAKE_ACK_BLITTER_GEN9);
+		for (i = 0; i < I915_MAX_VCS; i++) {
+			if (!HAS_ENGINE(dev_priv, _VCS(i)))
+				continue;
+
+			fw_domain_init(dev_priv, FW_DOMAIN_ID_MEDIA_VDBOX0 + i,
+				       FORCEWAKE_MEDIA_VDBOX_GEN11(i),
+				       FORCEWAKE_ACK_MEDIA_VDBOX_GEN11(i));
+		}
+		for (i = 0; i < I915_MAX_VECS; i++) {
+			if (!HAS_ENGINE(dev_priv, _VECS(i)))
+				continue;
+
+			fw_domain_init(dev_priv, FW_DOMAIN_ID_MEDIA_VEBOX0 + i,
+				       FORCEWAKE_MEDIA_VEBOX_GEN11(i),
+				       FORCEWAKE_ACK_MEDIA_VEBOX_GEN11(i));
+		}
+	} else if (IS_GEN9(dev_priv) || IS_GEN10(dev_priv)) {
 		dev_priv->uncore.funcs.force_wake_get =
 			fw_domains_get_with_fallback;
 		dev_priv->uncore.funcs.force_wake_put = fw_domains_put;
@@ -1422,10 +1554,14 @@  void intel_uncore_init(struct drm_i915_private *dev_priv)
 			ASSIGN_WRITE_MMIO_VFUNCS(dev_priv, gen8);
 			ASSIGN_READ_MMIO_VFUNCS(dev_priv, gen6);
 		}
-	} else {
+	} else if (IS_GEN(dev_priv, 9, 10)) {
 		ASSIGN_FW_DOMAINS_TABLE(__gen9_fw_ranges);
 		ASSIGN_WRITE_MMIO_VFUNCS(dev_priv, fwtable);
 		ASSIGN_READ_MMIO_VFUNCS(dev_priv, fwtable);
+	} else {
+		ASSIGN_FW_DOMAINS_TABLE(__gen11_fw_ranges);
+		ASSIGN_WRITE_MMIO_VFUNCS(dev_priv, gen11_fwtable);
+		ASSIGN_READ_MMIO_VFUNCS(dev_priv, gen11_fwtable);
 	}
 
 	iosf_mbi_register_pmic_bus_access_notifier(
@@ -1985,7 +2121,9 @@  intel_uncore_forcewake_for_read(struct drm_i915_private *dev_priv,
 	u32 offset = i915_mmio_reg_offset(reg);
 	enum forcewake_domains fw_domains;
 
-	if (HAS_FWTABLE(dev_priv)) {
+	if (INTEL_GEN(dev_priv) >= 11) {
+		fw_domains = __gen11_fwtable_reg_read_fw_domains(offset);
+	} else if (HAS_FWTABLE(dev_priv)) {
 		fw_domains = __fwtable_reg_read_fw_domains(offset);
 	} else if (INTEL_GEN(dev_priv) >= 6) {
 		fw_domains = __gen6_reg_read_fw_domains(offset);
@@ -2006,7 +2144,9 @@  intel_uncore_forcewake_for_write(struct drm_i915_private *dev_priv,
 	u32 offset = i915_mmio_reg_offset(reg);
 	enum forcewake_domains fw_domains;
 
-	if (HAS_FWTABLE(dev_priv) && !IS_VALLEYVIEW(dev_priv)) {
+	if (INTEL_GEN(dev_priv) >= 11) {
+		fw_domains = __gen11_fwtable_reg_write_fw_domains(offset);
+	} else if (HAS_FWTABLE(dev_priv) && !IS_VALLEYVIEW(dev_priv)) {
 		fw_domains = __fwtable_reg_write_fw_domains(offset);
 	} else if (IS_GEN8(dev_priv)) {
 		fw_domains = __gen8_reg_write_fw_domains(offset);
diff --git a/drivers/gpu/drm/i915/intel_uncore.h b/drivers/gpu/drm/i915/intel_uncore.h
index bed019ef000f..9e8330c5808e 100644
--- a/drivers/gpu/drm/i915/intel_uncore.h
+++ b/drivers/gpu/drm/i915/intel_uncore.h
@@ -37,17 +37,36 @@  enum forcewake_domain_id {
 	FW_DOMAIN_ID_RENDER = 0,
 	FW_DOMAIN_ID_BLITTER,
 	FW_DOMAIN_ID_MEDIA,
+	FW_DOMAIN_ID_MEDIA_VDBOX0,
+	FW_DOMAIN_ID_MEDIA_VDBOX1,
+	FW_DOMAIN_ID_MEDIA_VDBOX2,
+	FW_DOMAIN_ID_MEDIA_VDBOX3,
+	FW_DOMAIN_ID_MEDIA_VEBOX0,
+	FW_DOMAIN_ID_MEDIA_VEBOX1,
 
 	FW_DOMAIN_ID_COUNT
 };
 
 enum forcewake_domains {
-	FORCEWAKE_RENDER = BIT(FW_DOMAIN_ID_RENDER),
-	FORCEWAKE_BLITTER = BIT(FW_DOMAIN_ID_BLITTER),
-	FORCEWAKE_MEDIA	= BIT(FW_DOMAIN_ID_MEDIA),
+	FORCEWAKE_RENDER	= BIT(FW_DOMAIN_ID_RENDER),
+	FORCEWAKE_BLITTER	= BIT(FW_DOMAIN_ID_BLITTER),
+	FORCEWAKE_MEDIA		= BIT(FW_DOMAIN_ID_MEDIA),
+	FORCEWAKE_MEDIA_VDBOX0	= BIT(FW_DOMAIN_ID_MEDIA_VDBOX0),
+	FORCEWAKE_MEDIA_VDBOX1	= BIT(FW_DOMAIN_ID_MEDIA_VDBOX1),
+	FORCEWAKE_MEDIA_VDBOX2	= BIT(FW_DOMAIN_ID_MEDIA_VDBOX2),
+	FORCEWAKE_MEDIA_VDBOX3	= BIT(FW_DOMAIN_ID_MEDIA_VDBOX3),
+	FORCEWAKE_MEDIA_VEBOX0	= BIT(FW_DOMAIN_ID_MEDIA_VEBOX0),
+	FORCEWAKE_MEDIA_VEBOX1	= BIT(FW_DOMAIN_ID_MEDIA_VEBOX1),
+
 	FORCEWAKE_ALL = (FORCEWAKE_RENDER |
 			 FORCEWAKE_BLITTER |
-			 FORCEWAKE_MEDIA)
+			 FORCEWAKE_MEDIA |
+			 FORCEWAKE_MEDIA_VDBOX0 |
+			 FORCEWAKE_MEDIA_VDBOX1 |
+			 FORCEWAKE_MEDIA_VDBOX2 |
+			 FORCEWAKE_MEDIA_VDBOX3 |
+			 FORCEWAKE_MEDIA_VEBOX0 |
+			 FORCEWAKE_MEDIA_VEBOX1)
 };
 
 struct intel_uncore_funcs {
diff --git a/drivers/gpu/drm/i915/selftests/intel_uncore.c b/drivers/gpu/drm/i915/selftests/intel_uncore.c
index 2f6367643171..df1b5076fb8b 100644
--- a/drivers/gpu/drm/i915/selftests/intel_uncore.c
+++ b/drivers/gpu/drm/i915/selftests/intel_uncore.c
@@ -61,20 +61,30 @@  static int intel_fw_table_check(const struct intel_forcewake_range *ranges,
 
 static int intel_shadow_table_check(void)
 {
-	const i915_reg_t *reg = gen8_shadowed_regs;
-	unsigned int i;
+	struct {
+		const i915_reg_t *regs;
+		unsigned int size;
+	} reg_lists[] = {
+		{ gen8_shadowed_regs, ARRAY_SIZE(gen8_shadowed_regs) },
+		{ gen11_shadowed_regs, ARRAY_SIZE(gen11_shadowed_regs) },
+	};
+	const i915_reg_t *reg;
+	unsigned int i, j;
 	s32 prev;
 
-	for (i = 0, prev = -1; i < ARRAY_SIZE(gen8_shadowed_regs); i++, reg++) {
-		u32 offset = i915_mmio_reg_offset(*reg);
+	for (j = 0; j < ARRAY_SIZE(reg_lists); ++j) {
+		reg = reg_lists[j].regs;
+		for (i = 0, prev = -1; i < reg_lists[j].size; i++, reg++) {
+			u32 offset = i915_mmio_reg_offset(*reg);
 
-		if (prev >= (s32)offset) {
-			pr_err("%s: entry[%d]:(%x) is before previous (%x)\n",
-			       __func__, i, offset, prev);
-			return -EINVAL;
-		}
+			if (prev >= (s32)offset) {
+				pr_err("%s: entry[%d]:(%x) is before previous (%x)\n",
+				       __func__, i, offset, prev);
+				return -EINVAL;
+			}
 
-		prev = offset;
+			prev = offset;
+		}
 	}
 
 	return 0;