diff options
author | Ben Skeggs <bskeggs@redhat.com> | 2011-04-15 11:16:55 +1000 |
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committer | Ben Skeggs <bskeggs@redhat.com> | 2011-05-16 10:50:25 +1000 |
commit | dac55b58253fe4ced44979543bde35d25eaf56dc (patch) | |
tree | f71b2d27b38044d5734e328b51373cbbe8bff122 /drivers/gpu/drm/nouveau/nva3_pm.c | |
parent | aa58c4056355afd349aa4a0092de5141a425142a (diff) | |
download | linux-dac55b58253fe4ced44979543bde35d25eaf56dc.tar.gz |
drm/nva3/pm: initial pass at set_clock() hook
I still discourage anyone from actually doing this yet.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nva3_pm.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/nva3_pm.c | 115 |
1 files changed, 94 insertions, 21 deletions
diff --git a/drivers/gpu/drm/nouveau/nva3_pm.c b/drivers/gpu/drm/nouveau/nva3_pm.c index 5a68958f076b..5285b9813700 100644 --- a/drivers/gpu/drm/nouveau/nva3_pm.c +++ b/drivers/gpu/drm/nouveau/nva3_pm.c @@ -34,8 +34,14 @@ */ struct nva3_pm_state { - struct pll_lims pll; - int N, M, P; + enum pll_types type; + u32 src0; + u32 src1; + u32 ctrl; + u32 coef; + u32 old_pnm; + u32 new_pnm; + u32 new_div; }; static int @@ -96,36 +102,103 @@ void * nva3_pm_clock_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl, u32 id, int khz) { - struct nva3_pm_state *state; - int dummy, ret; - - state = kzalloc(sizeof(*state), GFP_KERNEL); - if (!state) - return ERR_PTR(-ENOMEM); + struct nva3_pm_state *pll; + struct pll_lims limits; + int N, fN, M, P, diff; + int ret, off; - ret = get_pll_limits(dev, id, &state->pll); - if (ret < 0) { - kfree(state); + ret = get_pll_limits(dev, id, &limits); + if (ret < 0) return (ret == -ENOENT) ? NULL : ERR_PTR(ret); + + off = nva3_pm_pll_offset(id); + if (id < 0) + return ERR_PTR(-EINVAL); + + + pll = kzalloc(sizeof(*pll), GFP_KERNEL); + if (!pll) + return ERR_PTR(-ENOMEM); + pll->type = id; + pll->src0 = 0x004120 + (off * 4); + pll->src1 = 0x004160 + (off * 4); + pll->ctrl = limits.reg + 0; + pll->coef = limits.reg + 4; + + /* If target clock is within [-2, 3) MHz of a divisor, we'll + * use that instead of calculating MNP values + */ + pll->new_div = ((limits.refclk * 2) / (khz - 2999)) & 0x0f; + if (pll->new_div) { + diff = khz - ((limits.refclk * 2) / pll->new_div); + if (diff < -2000 || diff >= 3000) + pll->new_div = 0; } - ret = nv50_calc_pll2(dev, &state->pll, khz, &state->N, &dummy, - &state->M, &state->P); - if (ret < 0) { - kfree(state); - return ERR_PTR(ret); + if (!pll->new_div) { + ret = nv50_calc_pll2(dev, &limits, khz, &N, &fN, &M, &P); + if (ret < 0) + return ERR_PTR(ret); + + pll->new_pnm = (P << 16) | (N << 8) | M; + pll->new_div = 2 - 1; + } else { + pll->new_pnm = 0; + pll->new_div--; } - return state; + if ((nv_rd32(dev, pll->src1) & 0x00000101) != 0x00000101) + pll->old_pnm = nv_rd32(dev, pll->coef); + return pll; } void nva3_pm_clock_set(struct drm_device *dev, void *pre_state) { - struct nva3_pm_state *state = pre_state; - u32 reg = state->pll.reg; + struct nva3_pm_state *pll = pre_state; + u32 ctrl = 0; + + /* For the memory clock, NVIDIA will build a "script" describing + * the reclocking process and ask PDAEMON to execute it. + */ + if (pll->type == PLL_MEMORY) { + nv_wr32(dev, 0x100210, 0); + nv_wr32(dev, 0x1002dc, 1); + nv_wr32(dev, 0x004018, 0x00001000); + ctrl = 0x18000100; + } + + if (pll->old_pnm || !pll->new_pnm) { + nv_mask(dev, pll->src1, 0x003c0101, 0x00000101 | + (pll->new_div << 18)); + nv_wr32(dev, pll->ctrl, 0x0001001d | ctrl); + nv_mask(dev, pll->ctrl, 0x00000001, 0x00000000); + } + + if (pll->new_pnm) { + nv_mask(dev, pll->src0, 0x00000101, 0x00000101); + nv_wr32(dev, pll->coef, pll->new_pnm); + nv_wr32(dev, pll->ctrl, 0x0001001d | ctrl); + nv_mask(dev, pll->ctrl, 0x00000010, 0x00000000); + nv_mask(dev, pll->ctrl, 0x00020010, 0x00020010); + nv_wr32(dev, pll->ctrl, 0x00010015 | ctrl); + nv_mask(dev, pll->src1, 0x00000100, 0x00000000); + nv_mask(dev, pll->src1, 0x00000001, 0x00000000); + if (pll->type == PLL_MEMORY) + nv_wr32(dev, 0x4018, 0x10005000); + } else { + nv_mask(dev, pll->ctrl, 0x00000001, 0x00000000); + nv_mask(dev, pll->src0, 0x00000100, 0x00000000); + nv_mask(dev, pll->src0, 0x00000001, 0x00000000); + if (pll->type == PLL_MEMORY) + nv_wr32(dev, 0x4018, 0x1000d000); + } + + if (pll->type == PLL_MEMORY) { + nv_wr32(dev, 0x1002dc, 0); + nv_wr32(dev, 0x100210, 0x80000000); + } - nv_wr32(dev, reg + 4, (state->P << 16) | (state->N << 8) | state->M); - kfree(state); + kfree(pll); } |