diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr5.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr5.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr5.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr5.c new file mode 100644 index 000000000000..f6f9eee1dcd0 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gddr5.c @@ -0,0 +1,120 @@ +/* + * Copyright 2013 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 <bskeggs@redhat.com> + */ +#include "priv.h" + +/* binary driver only executes this path if the condition (a) is true + * for any configuration (combination of rammap+ramcfg+timing) that + * can be reached on a given card. for now, we will execute the branch + * unconditionally in the hope that a "false everywhere" in the bios + * tables doesn't actually mean "don't touch this". + */ +#define NOTE00(a) 1 + +int +nvkm_gddr5_calc(struct nvkm_ram *ram, bool nuts) +{ + int pd, lf, xd, vh, vr, vo, l3; + int WL, CL, WR, at[2], dt, ds; + int rq = ram->freq < 1000000; /* XXX */ + + switch (ram->next->bios.ramcfg_ver) { + case 0x11: + pd = ram->next->bios.ramcfg_11_01_80; + lf = ram->next->bios.ramcfg_11_01_40; + xd = !ram->next->bios.ramcfg_11_01_20; + vh = ram->next->bios.ramcfg_11_02_10; + vr = ram->next->bios.ramcfg_11_02_04; + vo = ram->next->bios.ramcfg_11_06; + l3 = !ram->next->bios.ramcfg_11_07_02; + break; + default: + return -ENOSYS; + } + + switch (ram->next->bios.timing_ver) { + case 0x20: + WL = (ram->next->bios.timing[1] & 0x00000f80) >> 7; + CL = (ram->next->bios.timing[1] & 0x0000001f); + WR = (ram->next->bios.timing[2] & 0x007f0000) >> 16; + at[0] = ram->next->bios.timing_20_2e_c0; + at[1] = ram->next->bios.timing_20_2e_30; + dt = ram->next->bios.timing_20_2e_03; + ds = ram->next->bios.timing_20_2f_03; + break; + default: + return -ENOSYS; + } + + if (WL < 1 || WL > 7 || CL < 5 || CL > 36 || WR < 4 || WR > 35) + return -EINVAL; + CL -= 5; + WR -= 4; + + ram->mr[0] &= ~0xf7f; + ram->mr[0] |= (WR & 0x0f) << 8; + ram->mr[0] |= (CL & 0x0f) << 3; + ram->mr[0] |= (WL & 0x07) << 0; + + ram->mr[1] &= ~0x0bf; + ram->mr[1] |= (xd & 0x01) << 7; + ram->mr[1] |= (at[0] & 0x03) << 4; + ram->mr[1] |= (dt & 0x03) << 2; + ram->mr[1] |= (ds & 0x03) << 0; + + /* this seems wrong, alternate field used for the broadcast + * on nuts vs non-nuts configs.. meh, it matches for now. + */ + ram->mr1_nuts = ram->mr[1]; + if (nuts) { + ram->mr[1] &= ~0x030; + ram->mr[1] |= (at[1] & 0x03) << 4; + } + + ram->mr[3] &= ~0x020; + ram->mr[3] |= (rq & 0x01) << 5; + + ram->mr[5] &= ~0x004; + ram->mr[5] |= (l3 << 2); + + if (!vo) + vo = (ram->mr[6] & 0xff0) >> 4; + if (ram->mr[6] & 0x001) + pd = 1; /* binary driver does this.. bug? */ + ram->mr[6] &= ~0xff1; + ram->mr[6] |= (vo & 0xff) << 4; + ram->mr[6] |= (pd & 0x01) << 0; + + if (NOTE00(vr)) { + ram->mr[7] &= ~0x300; + ram->mr[7] |= (vr & 0x03) << 8; + } + ram->mr[7] &= ~0x088; + ram->mr[7] |= (vh & 0x01) << 7; + ram->mr[7] |= (lf & 0x01) << 3; + + ram->mr[8] &= ~0x003; + ram->mr[8] |= (WR & 0x10) >> 3; + ram->mr[8] |= (CL & 0x10) >> 4; + return 0; +} |