nb/intel/nehalem: Remove bogus GT PM init

This was simply copied from sandybridge/gma.c.
All these registers read back 0xffffffff or 0 or don't respond to
reads.

Change-Id: I094e7caa889a3175477aa78b91545ca804d423c8
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35746
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 3 insertions, 430 deletions

diff --git a/src/northbridge/intel/nehalem/gma.c b/src/northbridge/intel/nehalem/gma.c
index 087d37e5aa..43333070ff 100644
--- a/src/northbridge/intel/nehalem/gma.c
+++ b/src/northbridge/intel/nehalem/gma.c
@@ -36,225 +36,6 @@
 #include "chip.h"
 #include "nehalem.h"
 
-struct gt_powermeter {
-	u16 reg;
-	u32 value;
-};
-
-static const struct gt_powermeter snb_pm_gt1[] = {
-	{0xa200, 0xcc000000},
-	{0xa204, 0x07000040},
-	{0xa208, 0x0000fe00},
-	{0xa20c, 0x00000000},
-	{0xa210, 0x17000000},
-	{0xa214, 0x00000021},
-	{0xa218, 0x0817fe19},
-	{0xa21c, 0x00000000},
-	{0xa220, 0x00000000},
-	{0xa224, 0xcc000000},
-	{0xa228, 0x07000040},
-	{0xa22c, 0x0000fe00},
-	{0xa230, 0x00000000},
-	{0xa234, 0x17000000},
-	{0xa238, 0x00000021},
-	{0xa23c, 0x0817fe19},
-	{0xa240, 0x00000000},
-	{0xa244, 0x00000000},
-	{0xa248, 0x8000421e},
-	{0}
-};
-
-static const struct gt_powermeter snb_pm_gt2[] = {
-	{0xa200, 0x330000a6},
-	{0xa204, 0x402d0031},
-	{0xa208, 0x00165f83},
-	{0xa20c, 0xf1000000},
-	{0xa210, 0x00000000},
-	{0xa214, 0x00160016},
-	{0xa218, 0x002a002b},
-	{0xa21c, 0x00000000},
-	{0xa220, 0x00000000},
-	{0xa224, 0x330000a6},
-	{0xa228, 0x402d0031},
-	{0xa22c, 0x00165f83},
-	{0xa230, 0xf1000000},
-	{0xa234, 0x00000000},
-	{0xa238, 0x00160016},
-	{0xa23c, 0x002a002b},
-	{0xa240, 0x00000000},
-	{0xa244, 0x00000000},
-	{0xa248, 0x8000421e},
-	{0}
-};
-
-static const struct gt_powermeter ivb_pm_gt1[] = {
-	{0xa800, 0x00000000},
-	{0xa804, 0x00021c00},
-	{0xa808, 0x00000403},
-	{0xa80c, 0x02001700},
-	{0xa810, 0x05000200},
-	{0xa814, 0x00000000},
-	{0xa818, 0x00690500},
-	{0xa81c, 0x0000007f},
-	{0xa820, 0x01002501},
-	{0xa824, 0x00000300},
-	{0xa828, 0x01000331},
-	{0xa82c, 0x0000000c},
-	{0xa830, 0x00010016},
-	{0xa834, 0x01100101},
-	{0xa838, 0x00010103},
-	{0xa83c, 0x00041300},
-	{0xa840, 0x00000b30},
-	{0xa844, 0x00000000},
-	{0xa848, 0x7f000000},
-	{0xa84c, 0x05000008},
-	{0xa850, 0x00000001},
-	{0xa854, 0x00000004},
-	{0xa858, 0x00000007},
-	{0xa85c, 0x00000000},
-	{0xa860, 0x00010000},
-	{0xa248, 0x0000221e},
-	{0xa900, 0x00000000},
-	{0xa904, 0x00001c00},
-	{0xa908, 0x00000000},
-	{0xa90c, 0x06000000},
-	{0xa910, 0x09000200},
-	{0xa914, 0x00000000},
-	{0xa918, 0x00590000},
-	{0xa91c, 0x00000000},
-	{0xa920, 0x04002501},
-	{0xa924, 0x00000100},
-	{0xa928, 0x03000410},
-	{0xa92c, 0x00000000},
-	{0xa930, 0x00020000},
-	{0xa934, 0x02070106},
-	{0xa938, 0x00010100},
-	{0xa93c, 0x00401c00},
-	{0xa940, 0x00000000},
-	{0xa944, 0x00000000},
-	{0xa948, 0x10000e00},
-	{0xa94c, 0x02000004},
-	{0xa950, 0x00000001},
-	{0xa954, 0x00000004},
-	{0xa960, 0x00060000},
-	{0xaa3c, 0x00001c00},
-	{0xaa54, 0x00000004},
-	{0xaa60, 0x00060000},
-	{0}
-};
-
-static const struct gt_powermeter ivb_pm_gt2_17w[] = {
-	{0xa800, 0x20000000},
-	{0xa804, 0x000e3800},
-	{0xa808, 0x00000806},
-	{0xa80c, 0x0c002f00},
-	{0xa810, 0x0c000800},
-	{0xa814, 0x00000000},
-	{0xa818, 0x00d20d00},
-	{0xa81c, 0x000000ff},
-	{0xa820, 0x03004b02},
-	{0xa824, 0x00000600},
-	{0xa828, 0x07000773},
-	{0xa82c, 0x00000000},
-	{0xa830, 0x00020032},
-	{0xa834, 0x1520040d},
-	{0xa838, 0x00020105},
-	{0xa83c, 0x00083700},
-	{0xa840, 0x000016ff},
-	{0xa844, 0x00000000},
-	{0xa848, 0xff000000},
-	{0xa84c, 0x0a000010},
-	{0xa850, 0x00000002},
-	{0xa854, 0x00000008},
-	{0xa858, 0x0000000f},
-	{0xa85c, 0x00000000},
-	{0xa860, 0x00020000},
-	{0xa248, 0x0000221e},
-	{0xa900, 0x00000000},
-	{0xa904, 0x00003800},
-	{0xa908, 0x00000000},
-	{0xa90c, 0x0c000000},
-	{0xa910, 0x12000800},
-	{0xa914, 0x00000000},
-	{0xa918, 0x00b20000},
-	{0xa91c, 0x00000000},
-	{0xa920, 0x08004b02},
-	{0xa924, 0x00000300},
-	{0xa928, 0x01000820},
-	{0xa92c, 0x00000000},
-	{0xa930, 0x00030000},
-	{0xa934, 0x15150406},
-	{0xa938, 0x00020300},
-	{0xa93c, 0x00903900},
-	{0xa940, 0x00000000},
-	{0xa944, 0x00000000},
-	{0xa948, 0x20001b00},
-	{0xa94c, 0x0a000010},
-	{0xa950, 0x00000000},
-	{0xa954, 0x00000008},
-	{0xa960, 0x00110000},
-	{0xaa3c, 0x00003900},
-	{0xaa54, 0x00000008},
-	{0xaa60, 0x00110000},
-	{0}
-};
-
-static const struct gt_powermeter ivb_pm_gt2_35w[] = {
-	{0xa800, 0x00000000},
-	{0xa804, 0x00030400},
-	{0xa808, 0x00000806},
-	{0xa80c, 0x0c002f00},
-	{0xa810, 0x0c000300},
-	{0xa814, 0x00000000},
-	{0xa818, 0x00d20d00},
-	{0xa81c, 0x000000ff},
-	{0xa820, 0x03004b02},
-	{0xa824, 0x00000600},
-	{0xa828, 0x07000773},
-	{0xa82c, 0x00000000},
-	{0xa830, 0x00020032},
-	{0xa834, 0x1520040d},
-	{0xa838, 0x00020105},
-	{0xa83c, 0x00083700},
-	{0xa840, 0x000016ff},
-	{0xa844, 0x00000000},
-	{0xa848, 0xff000000},
-	{0xa84c, 0x0a000010},
-	{0xa850, 0x00000001},
-	{0xa854, 0x00000008},
-	{0xa858, 0x00000008},
-	{0xa85c, 0x00000000},
-	{0xa860, 0x00020000},
-	{0xa248, 0x0000221e},
-	{0xa900, 0x00000000},
-	{0xa904, 0x00003800},
-	{0xa908, 0x00000000},
-	{0xa90c, 0x0c000000},
-	{0xa910, 0x12000800},
-	{0xa914, 0x00000000},
-	{0xa918, 0x00b20000},
-	{0xa91c, 0x00000000},
-	{0xa920, 0x08004b02},
-	{0xa924, 0x00000300},
-	{0xa928, 0x01000820},
-	{0xa92c, 0x00000000},
-	{0xa930, 0x00030000},
-	{0xa934, 0x15150406},
-	{0xa938, 0x00020300},
-	{0xa93c, 0x00903900},
-	{0xa940, 0x00000000},
-	{0xa944, 0x00000000},
-	{0xa948, 0x20001b00},
-	{0xa94c, 0x0a000010},
-	{0xa950, 0x00000000},
-	{0xa954, 0x00000008},
-	{0xa960, 0x00110000},
-	{0xaa3c, 0x00003900},
-	{0xaa54, 0x00000008},
-	{0xaa60, 0x00110000},
-	{0}
-};
-
 /* some vga option roms are used for several chipsets but they only have one
  * PCI ID in their header. If we encounter such an option rom, we need to do
  * the mapping ourselves
@@ -281,12 +62,6 @@ void gtt_write(u32 reg, u32 data)
 	write32(res2mmio(gtt_res, reg, 0), data);
 }
 
-static inline void gtt_write_powermeter(const struct gt_powermeter *pm)
-{
-	for (; pm && pm->reg; pm++)
-		gtt_write(pm->reg, pm->value);
-}
-
 #define GTT_RETRY 1000
 int gtt_poll(u32 reg, u32 mask, u32 value)
 {
@@ -317,196 +92,6 @@ void gma_set_gnvs_aslb(void *gnvs, uintptr_t aslb)
 		gnvs_ptr->aslb = aslb;
 }
 
-static void gma_pm_init_pre_vbios(struct device *dev)
-{
-	u32 reg32;
-
-	printk(BIOS_DEBUG, "GT Power Management Init\n");
-
-	gtt_res = find_resource(dev, PCI_BASE_ADDRESS_0);
-	if (!gtt_res || !gtt_res->base)
-		return;
-
-	if (bridge_silicon_revision() < IVB_STEP_C0) {
-		/* 1: Enable force wake */
-		gtt_write(0xa18c, 0x00000001);
-		gtt_poll(0x130090, (1 << 0), (1 << 0));
-	} else {
-		gtt_write(0xa180, 1 << 5);
-		gtt_write(0xa188, 0xffff0001);
-		gtt_poll(0x130040, (1 << 0), (1 << 0));
-	}
-
-	if ((bridge_silicon_revision() & BASE_REV_MASK) == BASE_REV_SNB) {
-		/* 1d: Set GTT+0x42004 [15:14]=11 (SnB C1+) */
-		reg32 = gtt_read(0x42004);
-		reg32 |= (1 << 14) | (1 << 15);
-		gtt_write(0x42004, reg32);
-	}
-
-	if (bridge_silicon_revision() >= IVB_STEP_A0) {
-		/* Display Reset Acknowledge Settings */
-		reg32 = gtt_read(0x45010);
-		reg32 |= (1 << 1) | (1 << 0);
-		gtt_write(0x45010, reg32);
-	}
-
-	/* 2: Get GT SKU from GTT+0x911c[13] */
-	reg32 = gtt_read(0x911c);
-	if ((bridge_silicon_revision() & BASE_REV_MASK) == BASE_REV_SNB) {
-		if (reg32 & (1 << 13)) {
-			printk(BIOS_DEBUG, "SNB GT1 Power Meter Weights\n");
-			gtt_write_powermeter(snb_pm_gt1);
-		} else {
-			printk(BIOS_DEBUG, "SNB GT2 Power Meter Weights\n");
-			gtt_write_powermeter(snb_pm_gt2);
-		}
-	} else {
-		u32 unit = MCHBAR32(0x5938) & 0xf;
-
-		if (reg32 & (1 << 13)) {
-			/* GT1 SKU */
-			printk(BIOS_DEBUG, "IVB GT1 Power Meter Weights\n");
-			gtt_write_powermeter(ivb_pm_gt1);
-		} else {
-			/* GT2 SKU */
-			u32 tdp = MCHBAR32(0x5930) & 0x7fff;
-			tdp /= (1 << unit);
-
-			if (tdp <= 17) {
-				/* <=17W ULV */
-				printk(BIOS_DEBUG, "IVB GT2 17W "
-				       "Power Meter Weights\n");
-				gtt_write_powermeter(ivb_pm_gt2_17w);
-			} else if ((tdp >= 25) && (tdp <= 35)) {
-				/* 25W-35W */
-				printk(BIOS_DEBUG, "IVB GT2 25W-35W "
-				       "Power Meter Weights\n");
-				gtt_write_powermeter(ivb_pm_gt2_35w);
-			} else {
-				/* All others */
-				printk(BIOS_DEBUG, "IVB GT2 35W "
-				       "Power Meter Weights\n");
-				gtt_write_powermeter(ivb_pm_gt2_35w);
-			}
-		}
-	}
-
-	/* 3: Gear ratio map */
-	gtt_write(0xa004, 0x00000010);
-
-	/* 4: GFXPAUSE */
-	gtt_write(0xa000, 0x00070020);
-
-	/* 5: Dynamic EU trip control */
-	gtt_write(0xa080, 0x00000004);
-
-	/* 6: ECO bits */
-	reg32 = gtt_read(0xa180);
-	reg32 |= (1 << 26) | (1 << 31);
-	/* (bit 20=1 for SNB step D1+ / IVB A0+) */
-	if (bridge_silicon_revision() >= SNB_STEP_D1)
-		reg32 |= (1 << 20);
-	gtt_write(0xa180, reg32);
-
-	/* 6a: for SnB step D2+ only */
-	if (((bridge_silicon_revision() & BASE_REV_MASK) == BASE_REV_SNB) &&
-	    (bridge_silicon_revision() >= SNB_STEP_D2)) {
-		reg32 = gtt_read(0x9400);
-		reg32 |= (1 << 7);
-		gtt_write(0x9400, reg32);
-
-		reg32 = gtt_read(0x941c);
-		reg32 &= 0xf;
-		reg32 |= (1 << 1);
-		gtt_write(0x941c, reg32);
-		gtt_poll(0x941c, (1 << 1), (0 << 1));
-	}
-
-	if ((bridge_silicon_revision() & BASE_REV_MASK) == BASE_REV_IVB) {
-		reg32 = gtt_read(0x907c);
-		reg32 |= (1 << 16);
-		gtt_write(0x907c, reg32);
-
-		/* 6b: Clocking reset controls */
-		gtt_write(0x9424, 0x00000001);
-	} else {
-		/* 6b: Clocking reset controls */
-		gtt_write(0x9424, 0x00000000);
-	}
-
-	/* 7 */
-	if (gtt_poll(0x138124, (1 << 31), (0 << 31))) {
-		gtt_write(0x138128, 0x00000029);	/* Mailbox Data */
-		gtt_write(0x138124, 0x80000004);	/* Mailbox Cmd for RC6 VID */
-		if (gtt_poll(0x138124, (1 << 31), (0 << 31)))
-			gtt_write(0x138124, 0x8000000a);
-		gtt_poll(0x138124, (1 << 31), (0 << 31));
-	}
-
-	/* 8 */
-	gtt_write(0xa090, 0x00000000);	/* RC Control */
-	gtt_write(0xa098, 0x03e80000);	/* RC1e Wake Rate Limit */
-	gtt_write(0xa09c, 0x0028001e);	/* RC6/6p Wake Rate Limit */
-	gtt_write(0xa0a0, 0x0000001e);	/* RC6pp Wake Rate Limit */
-	gtt_write(0xa0a8, 0x0001e848);	/* RC Evaluation Interval */
-	gtt_write(0xa0ac, 0x00000019);	/* RC Idle Hysteresis */
-
-	/* 9 */
-	gtt_write(0x2054, 0x0000000a);	/* Render Idle Max Count */
-	gtt_write(0x12054, 0x0000000a);	/* Video Idle Max Count */
-	gtt_write(0x22054, 0x0000000a);	/* Blitter Idle Max Count */
-
-	/* 10 */
-	gtt_write(0xa0b0, 0x00000000);	/* Unblock Ack to Busy */
-	gtt_write(0xa0b4, 0x000003e8);	/* RC1e Threshold */
-	gtt_write(0xa0b8, 0x0000c350);	/* RC6 Threshold */
-	gtt_write(0xa0bc, 0x000186a0);	/* RC6p Threshold */
-	gtt_write(0xa0c0, 0x0000fa00);	/* RC6pp Threshold */
-
-	/* 11 */
-	gtt_write(0xa010, 0x000f4240);	/* RP Down Timeout */
-	gtt_write(0xa014, 0x12060000);	/* RP Interrupt Limits */
-	gtt_write(0xa02c, 0x00015f90);	/* RP Up Threshold */
-	gtt_write(0xa030, 0x000186a0);	/* RP Down Threshold */
-	gtt_write(0xa068, 0x000186a0);	/* RP Up EI */
-	gtt_write(0xa06c, 0x000493e0);	/* RP Down EI */
-	gtt_write(0xa070, 0x0000000a);	/* RP Idle Hysteresis */
-
-	/* 11a: Enable Render Standby (RC6) */
-	if ((bridge_silicon_revision() & BASE_REV_MASK) == BASE_REV_IVB) {
-		/*
-		 * IvyBridge should also support DeepRenderStandby.
-		 *
-		 * Unfortunately it does not work reliably on all SKUs so
-		 * disable it here and it can be enabled by the kernel.
-		 */
-		gtt_write(0xa090, 0x88040000);	/* HW RC Control */
-	} else {
-		gtt_write(0xa090, 0x88040000);	/* HW RC Control */
-	}
-
-	/* 12: Normal Frequency Request */
-	/* RPNFREQ_VAL comes from MCHBAR 0x5998 23:16 */
-	/* only the lower 7 bits are used and shifted left by 25 */
-	reg32 = MCHBAR32(0x5998);
-	reg32 >>= 16;
-	reg32 &= 0x7f;
-	reg32 <<= 25;
-	gtt_write(0xa008, reg32);
-
-	/* 13: RP Control */
-	gtt_write(0xa024, 0x00000592);
-
-	/* 14: Enable PM Interrupts */
-	gtt_write(0x4402c, 0x03000076);
-
-	/* Clear 0x6c024 [8:6] */
-	reg32 = gtt_read(0x6c024);
-	reg32 &= ~0x000001c0;
-	gtt_write(0x6c024, reg32);
-}
-
 static void gma_pm_init_post_vbios(struct device *dev)
 {
 	struct northbridge_intel_nehalem_config *conf = dev->chip_info;
@@ -514,19 +99,6 @@ static void gma_pm_init_post_vbios(struct device *dev)
 
 	printk(BIOS_DEBUG, "GT Power Management Init (post VBIOS)\n");
 
-	/* 15: Deassert Force Wake */
-	if (bridge_silicon_revision() < IVB_STEP_C0) {
-		gtt_write(0xa18c, gtt_read(0xa18c) & ~1);
-		gtt_poll(0x130090, (1 << 0), (0 << 0));
-	} else {
-		gtt_write(0xa188, 0x1fffe);
-		if (gtt_poll(0x130040, (1 << 0), (0 << 0)))
-			gtt_write(0xa188, gtt_read(0xa188) | 1);
-	}
-
-	/* 16: SW RC Control */
-	gtt_write(0xa094, 0x00060000);
-
 	/* Setup Digital Port Hotplug */
 	reg32 = gtt_read(0xc4030);
 	if (!reg32) {
@@ -600,8 +172,9 @@ static void gma_func0_init(struct device *dev)
 	reg32 |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
 	pci_write_config32(dev, PCI_COMMAND, reg32);
 
-	/* Init graphics power management */
-	gma_pm_init_pre_vbios(dev);
+	gtt_res = find_resource(dev, PCI_BASE_ADDRESS_0);
+	if (!gtt_res || !gtt_res->base)
+		return;
 
 	if (CONFIG(MAINBOARD_USE_LIBGFXINIT)) {
 		struct northbridge_intel_nehalem_config *conf = dev->chip_info;