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>
diff --git a/src/northbridge/intel/nehalem/gma.c b/src/northbridge/intel/nehalem/gma.c
index 087d37e..4333307 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 @@
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 @@
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 @@
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 @@
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;