diff options
author | Ingo Molnar <mingo@elte.hu> | 2010-10-30 10:43:08 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2010-10-30 10:43:08 +0200 |
commit | 169ed55bd30305b933f52bfab32a58671d44ab68 (patch) | |
tree | 32e280957474f458901abfce16fa2a1687ef7497 /drivers/gpu/drm/nouveau/nva3_pm.c | |
parent | 3d7851b3cdd43a734e5cc4c643fd886ab28ad4d5 (diff) | |
parent | 45f81b1c96d9793e47ce925d257ea693ce0b193e (diff) |
Merge branch 'tip/perf/jump-label-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/urgent
Diffstat (limited to 'drivers/gpu/drm/nouveau/nva3_pm.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/nva3_pm.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nva3_pm.c b/drivers/gpu/drm/nouveau/nva3_pm.c new file mode 100644 index 00000000000..dbbafed3640 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nva3_pm.c @@ -0,0 +1,95 @@ +/* + * Copyright 2010 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" + +/*XXX: boards using limits 0x40 need fixing, the register layout + * is correct here, but, there's some other funny magic + * that modifies things, so it's not likely we'll set/read + * the correct timings yet.. working on it... + */ + +struct nva3_pm_state { + struct pll_lims pll; + int N, M, P; +}; + +int +nva3_pm_clock_get(struct drm_device *dev, u32 id) +{ + struct pll_lims pll; + int P, N, M, ret; + u32 reg; + + ret = get_pll_limits(dev, id, &pll); + if (ret) + return ret; + + reg = nv_rd32(dev, pll.reg + 4); + P = (reg & 0x003f0000) >> 16; + N = (reg & 0x0000ff00) >> 8; + M = (reg & 0x000000ff); + return pll.refclk * N / M / P; +} + +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); + + ret = get_pll_limits(dev, id, &state->pll); + if (ret < 0) { + kfree(state); + return (ret == -ENOENT) ? NULL : ERR_PTR(ret); + } + + ret = nv50_calc_pll2(dev, &state->pll, khz, &state->N, &dummy, + &state->M, &state->P); + if (ret < 0) { + kfree(state); + return ERR_PTR(ret); + } + + return state; +} + +void +nva3_pm_clock_set(struct drm_device *dev, void *pre_state) +{ + struct nva3_pm_state *state = pre_state; + u32 reg = state->pll.reg; + + nv_wr32(dev, reg + 4, (state->P << 16) | (state->N << 8) | state->M); + kfree(state); +} + |