diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvc0_pm.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvc0_pm.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvc0_pm.c b/drivers/gpu/drm/nouveau/nvc0_pm.c new file mode 100644 index 000000000000..929aded35cb5 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvc0_pm.c @@ -0,0 +1,155 @@ +/* + * 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" + +static u32 read_div(struct drm_device *, int, u32, u32); +static u32 read_pll(struct drm_device *, u32); + +static u32 +read_vco(struct drm_device *dev, u32 dsrc) +{ + u32 ssrc = nv_rd32(dev, dsrc); + if (!(ssrc & 0x00000100)) + return read_pll(dev, 0x00e800); + return read_pll(dev, 0x00e820); +} + +static u32 +read_pll(struct drm_device *dev, u32 pll) +{ + u32 ctrl = nv_rd32(dev, pll + 0); + u32 coef = nv_rd32(dev, pll + 4); + u32 P = (coef & 0x003f0000) >> 16; + u32 N = (coef & 0x0000ff00) >> 8; + u32 M = (coef & 0x000000ff) >> 0; + u32 sclk, doff; + + if (!(ctrl & 0x00000001)) + return 0; + + switch (pll & 0xfff000) { + case 0x00e000: + sclk = 27000; + P = 1; + break; + case 0x137000: + doff = (pll - 0x137000) / 0x20; + sclk = read_div(dev, doff, 0x137120, 0x137140); + break; + case 0x132000: + switch (pll) { + case 0x132000: + sclk = read_pll(dev, 0x132020); + break; + case 0x132020: + sclk = read_div(dev, 0, 0x137320, 0x137330); + break; + default: + return 0; + } + break; + default: + return 0; + } + + return sclk * N / M / P; +} + +static u32 +read_div(struct drm_device *dev, int doff, u32 dsrc, u32 dctl) +{ + u32 ssrc = nv_rd32(dev, dsrc + (doff * 4)); + u32 sctl = nv_rd32(dev, dctl + (doff * 4)); + + switch (ssrc & 0x00000003) { + case 0: + if ((ssrc & 0x00030000) != 0x00030000) + return 27000; + return 108000; + case 2: + return 100000; + case 3: + if (sctl & 0x80000000) { + u32 sclk = read_vco(dev, dsrc + (doff * 4)); + u32 sdiv = (sctl & 0x0000003f) + 2; + return (sclk * 2) / sdiv; + } + + return read_vco(dev, dsrc + (doff * 4)); + default: + return 0; + } +} + +static u32 +read_mem(struct drm_device *dev) +{ + u32 ssel = nv_rd32(dev, 0x1373f0); + if (ssel & 0x00000001) + return read_div(dev, 0, 0x137300, 0x137310); + return read_pll(dev, 0x132000); +} + +static u32 +read_clk(struct drm_device *dev, int clk) +{ + u32 sctl = nv_rd32(dev, 0x137250 + (clk * 4)); + u32 ssel = nv_rd32(dev, 0x137100); + u32 sclk, sdiv; + + if (ssel & (1 << clk)) { + if (clk < 7) + sclk = read_pll(dev, 0x137000 + (clk * 0x20)); + else + sclk = read_pll(dev, 0x1370e0); + sdiv = ((sctl & 0x00003f00) >> 8) + 2; + } else { + sclk = read_div(dev, clk, 0x137160, 0x1371d0); + sdiv = ((sctl & 0x0000003f) >> 0) + 2; + } + + if (sctl & 0x80000000) + return (sclk * 2) / sdiv; + return sclk; +} + +int +nvc0_pm_clocks_get(struct drm_device *dev, struct nouveau_pm_level *perflvl) +{ + perflvl->shader = read_clk(dev, 0x00); + perflvl->core = perflvl->shader / 2; + perflvl->memory = read_mem(dev); + perflvl->rop = read_clk(dev, 0x01); + perflvl->hub07 = read_clk(dev, 0x02); + perflvl->hub06 = read_clk(dev, 0x07); + perflvl->hub01 = read_clk(dev, 0x08); + perflvl->copy = read_clk(dev, 0x09); + perflvl->daemon = read_clk(dev, 0x0c); + perflvl->vdec = read_clk(dev, 0x0e); + return 0; +} |