diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nv40_pm.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/nv40_pm.c | 348 |
1 files changed, 348 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nv40_pm.c b/drivers/gpu/drm/nouveau/nv40_pm.c new file mode 100644 index 000000000000..e676b0d53478 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nv40_pm.c @@ -0,0 +1,348 @@ +/* + * Copyright 2011 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Ben Skeggs + */ + +#include "drmP.h" +#include "nouveau_drv.h" +#include "nouveau_bios.h" +#include "nouveau_pm.h" +#include "nouveau_hw.h" + +#define min2(a,b) ((a) < (b) ? (a) : (b)) + +static u32 +read_pll_1(struct drm_device *dev, u32 reg) +{ + u32 ctrl = nv_rd32(dev, reg + 0x00); + int P = (ctrl & 0x00070000) >> 16; + int N = (ctrl & 0x0000ff00) >> 8; + int M = (ctrl & 0x000000ff) >> 0; + u32 ref = 27000, clk = 0; + + if (ctrl & 0x80000000) + clk = ref * N / M; + + return clk >> P; +} + +static u32 +read_pll_2(struct drm_device *dev, u32 reg) +{ + u32 ctrl = nv_rd32(dev, reg + 0x00); + u32 coef = nv_rd32(dev, reg + 0x04); + int N2 = (coef & 0xff000000) >> 24; + int M2 = (coef & 0x00ff0000) >> 16; + int N1 = (coef & 0x0000ff00) >> 8; + int M1 = (coef & 0x000000ff) >> 0; + int P = (ctrl & 0x00070000) >> 16; + u32 ref = 27000, clk = 0; + + if ((ctrl & 0x80000000) && M1) { + clk = ref * N1 / M1; + if ((ctrl & 0x40000100) == 0x40000000) { + if (M2) + clk = clk * N2 / M2; + else + clk = 0; + } + } + + return clk >> P; +} + +static u32 +read_clk(struct drm_device *dev, u32 src) +{ + switch (src) { + case 3: + return read_pll_2(dev, 0x004000); + case 2: + return read_pll_1(dev, 0x004008); + default: + break; + } + + return 0; +} + +int +nv40_pm_clocks_get(struct drm_device *dev, struct nouveau_pm_level *perflvl) +{ + u32 ctrl = nv_rd32(dev, 0x00c040); + + perflvl->core = read_clk(dev, (ctrl & 0x00000003) >> 0); + perflvl->shader = read_clk(dev, (ctrl & 0x00000030) >> 4); + perflvl->memory = read_pll_2(dev, 0x4020); + return 0; +} + +struct nv40_pm_state { + u32 ctrl; + u32 npll_ctrl; + u32 npll_coef; + u32 spll; + u32 mpll_ctrl; + u32 mpll_coef; +}; + +static int +nv40_calc_pll(struct drm_device *dev, u32 reg, struct pll_lims *pll, + u32 clk, int *N1, int *M1, int *N2, int *M2, int *log2P) +{ + struct nouveau_pll_vals coef; + int ret; + + ret = get_pll_limits(dev, reg, pll); + if (ret) + return ret; + + if (clk < pll->vco1.maxfreq) + pll->vco2.maxfreq = 0; + + ret = nouveau_calc_pll_mnp(dev, pll, clk, &coef); + if (ret == 0) + return -ERANGE; + + *N1 = coef.N1; + *M1 = coef.M1; + if (N2 && M2) { + if (pll->vco2.maxfreq) { + *N2 = coef.N2; + *M2 = coef.M2; + } else { + *N2 = 1; + *M2 = 1; + } + } + *log2P = coef.log2P; + return 0; +} + +void * +nv40_pm_clocks_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl) +{ + struct nv40_pm_state *info; + struct pll_lims pll; + int N1, N2, M1, M2, log2P; + int ret; + + info = kmalloc(sizeof(*info), GFP_KERNEL); + if (!info) + return ERR_PTR(-ENOMEM); + + /* core/geometric clock */ + ret = nv40_calc_pll(dev, 0x004000, &pll, perflvl->core, + &N1, &M1, &N2, &M2, &log2P); + if (ret < 0) + goto out; + + if (N2 == M2) { + info->npll_ctrl = 0x80000100 | (log2P << 16); + info->npll_coef = (N1 << 8) | M1; + } else { + info->npll_ctrl = 0xc0000000 | (log2P << 16); + info->npll_coef = (N2 << 24) | (M2 << 16) | (N1 << 8) | M1; + } + + /* use the second PLL for shader/rop clock, if it differs from core */ + if (perflvl->shader && perflvl->shader != perflvl->core) { + ret = nv40_calc_pll(dev, 0x004008, &pll, perflvl->shader, + &N1, &M1, NULL, NULL, &log2P); + if (ret < 0) + goto out; + + info->spll = 0xc0000000 | (log2P << 16) | (N1 << 8) | M1; + info->ctrl = 0x00000223; + } else { + info->spll = 0x00000000; + info->ctrl = 0x00000333; + } + + /* memory clock */ + if (!perflvl->memory) { + info->mpll_ctrl = 0x00000000; + goto out; + } + + ret = nv40_calc_pll(dev, 0x004020, &pll, perflvl->memory, + &N1, &M1, &N2, &M2, &log2P); + if (ret < 0) + goto out; + + info->mpll_ctrl = 0x80000000 | (log2P << 16); + info->mpll_ctrl |= min2(pll.log2p_bias + log2P, pll.max_log2p) << 20; + if (N2 == M2) { + info->mpll_ctrl |= 0x00000100; + info->mpll_coef = (N1 << 8) | M1; + } else { + info->mpll_ctrl |= 0x40000000; + info->mpll_coef = (N2 << 24) | (M2 << 16) | (N1 << 8) | M1; + } + +out: + if (ret < 0) { + kfree(info); + info = ERR_PTR(ret); + } + return info; +} + +static bool +nv40_pm_gr_idle(void *data) +{ + struct drm_device *dev = data; + + if ((nv_rd32(dev, 0x400760) & 0x000000f0) >> 4 != + (nv_rd32(dev, 0x400760) & 0x0000000f)) + return false; + + if (nv_rd32(dev, 0x400700)) + return false; + + return true; +} + +void +nv40_pm_clocks_set(struct drm_device *dev, void *pre_state) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + struct nv40_pm_state *info = pre_state; + unsigned long flags; + struct bit_entry M; + u32 crtc_mask = 0; + u8 sr1[2]; + int i; + + /* determine which CRTCs are active, fetch VGA_SR1 for each */ + for (i = 0; i < 2; i++) { + u32 vbl = nv_rd32(dev, 0x600808 + (i * 0x2000)); + u32 cnt = 0; + do { + if (vbl != nv_rd32(dev, 0x600808 + (i * 0x2000))) { + nv_wr08(dev, 0x0c03c4 + (i * 0x2000), 0x01); + sr1[i] = nv_rd08(dev, 0x0c03c5 + (i * 0x2000)); + if (!(sr1[i] & 0x20)) + crtc_mask |= (1 << i); + break; + } + udelay(1); + } while (cnt++ < 32); + } + + /* halt and idle engines */ + spin_lock_irqsave(&dev_priv->context_switch_lock, flags); + nv_mask(dev, 0x002500, 0x00000001, 0x00000000); + if (!nv_wait(dev, 0x002500, 0x00000010, 0x00000000)) + goto resume; + nv_mask(dev, 0x003220, 0x00000001, 0x00000000); + if (!nv_wait(dev, 0x003220, 0x00000010, 0x00000000)) + goto resume; + nv_mask(dev, 0x003200, 0x00000001, 0x00000000); + nv04_fifo_cache_pull(dev, false); + + if (!nv_wait_cb(dev, nv40_pm_gr_idle, dev)) + goto resume; + + /* set engine clocks */ + nv_mask(dev, 0x00c040, 0x00000333, 0x00000000); + nv_wr32(dev, 0x004004, info->npll_coef); + nv_mask(dev, 0x004000, 0xc0070100, info->npll_ctrl); + nv_mask(dev, 0x004008, 0xc007ffff, info->spll); + mdelay(5); + nv_mask(dev, 0x00c040, 0x00000333, info->ctrl); + + if (!info->mpll_ctrl) + goto resume; + + /* wait for vblank start on active crtcs, disable memory access */ + for (i = 0; i < 2; i++) { + if (!(crtc_mask & (1 << i))) + continue; + nv_wait(dev, 0x600808 + (i * 0x2000), 0x00010000, 0x00000000); + nv_wait(dev, 0x600808 + (i * 0x2000), 0x00010000, 0x00010000); + nv_wr08(dev, 0x0c03c4 + (i * 0x2000), 0x01); + nv_wr08(dev, 0x0c03c5 + (i * 0x2000), sr1[i] | 0x20); + } + + /* prepare ram for reclocking */ + nv_wr32(dev, 0x1002d4, 0x00000001); /* precharge */ + nv_wr32(dev, 0x1002d0, 0x00000001); /* refresh */ + nv_wr32(dev, 0x1002d0, 0x00000001); /* refresh */ + nv_mask(dev, 0x100210, 0x80000000, 0x00000000); /* no auto refresh */ + nv_wr32(dev, 0x1002dc, 0x00000001); /* enable self-refresh */ + + /* change the PLL of each memory partition */ + nv_mask(dev, 0x00c040, 0x0000c000, 0x00000000); + switch (dev_priv->chipset) { + case 0x40: + case 0x45: + case 0x41: + case 0x42: + case 0x47: + nv_mask(dev, 0x004044, 0xc0771100, info->mpll_ctrl); + nv_mask(dev, 0x00402c, 0xc0771100, info->mpll_ctrl); + nv_wr32(dev, 0x004048, info->mpll_coef); + nv_wr32(dev, 0x004030, info->mpll_coef); + case 0x43: + case 0x49: + case 0x4b: + nv_mask(dev, 0x004038, 0xc0771100, info->mpll_ctrl); + nv_wr32(dev, 0x00403c, info->mpll_coef); + default: + nv_mask(dev, 0x004020, 0xc0771100, info->mpll_ctrl); + nv_wr32(dev, 0x004024, info->mpll_coef); + break; + } + udelay(100); + nv_mask(dev, 0x00c040, 0x0000c000, 0x0000c000); + + /* re-enable normal operation of memory controller */ + nv_wr32(dev, 0x1002dc, 0x00000000); + nv_mask(dev, 0x100210, 0x80000000, 0x80000000); + udelay(100); + + /* execute memory reset script from vbios */ + if (!bit_table(dev, 'M', &M)) + nouveau_bios_init_exec(dev, ROM16(M.data[0])); + + /* make sure we're in vblank (hopefully the same one as before), and + * then re-enable crtc memory access + */ + for (i = 0; i < 2; i++) { + if (!(crtc_mask & (1 << i))) + continue; + nv_wait(dev, 0x600808 + (i * 0x2000), 0x00010000, 0x00010000); + nv_wr08(dev, 0x0c03c4 + (i * 0x2000), 0x01); + nv_wr08(dev, 0x0c03c5 + (i * 0x2000), sr1[i]); + } + + /* resume engines */ +resume: + nv_wr32(dev, 0x003250, 0x00000001); + nv_mask(dev, 0x003220, 0x00000001, 0x00000001); + nv_wr32(dev, 0x003200, 0x00000001); + nv_wr32(dev, 0x002500, 0x00000001); + spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags); + + kfree(info); +} |