diff --git a/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/vpstate.h b/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/vpstate.h new file mode 100644 index 0000000000000000000000000000000000000000..87f804fc3a887921418ee045155327da4652e5e1 --- /dev/null +++ b/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/vpstate.h @@ -0,0 +1,24 @@ +#ifndef __NVBIOS_VPSTATE_H__ +#define __NVBIOS_VPSTATE_H__ +struct nvbios_vpstate_header { + u32 offset; + + u8 version; + u8 hlen; + u8 ecount; + u8 elen; + u8 scount; + u8 slen; + + u8 base_id; + u8 boost_id; + u8 tdp_id; +}; +struct nvbios_vpstate_entry { + u8 pstate; + u16 clock_mhz; +}; +int nvbios_vpstate_parse(struct nvkm_bios *, struct nvbios_vpstate_header *); +int nvbios_vpstate_entry(struct nvkm_bios *, struct nvbios_vpstate_header *, + u8 idx, struct nvbios_vpstate_entry *); +#endif diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/Kbuild b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/Kbuild index dbcb0ef21587e5a64670205d516eaab24b42ddc5..be57220a2e01455d03355485547329a9231f5f39 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/Kbuild +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/Kbuild @@ -31,6 +31,7 @@ nvkm-y += nvkm/subdev/bios/timing.o nvkm-y += nvkm/subdev/bios/therm.o nvkm-y += nvkm/subdev/bios/vmap.o nvkm-y += nvkm/subdev/bios/volt.o +nvkm-y += nvkm/subdev/bios/vpstate.o nvkm-y += nvkm/subdev/bios/xpio.o nvkm-y += nvkm/subdev/bios/M0203.o nvkm-y += nvkm/subdev/bios/M0205.o diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/vpstate.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/vpstate.c new file mode 100644 index 0000000000000000000000000000000000000000..f199270163d2c17aa938c3fc0792de2813f3d89c --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/vpstate.c @@ -0,0 +1,82 @@ +/* + * Copyright 2016 Karol Herbst + * + * 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: Karol Herbst + */ +#include +#include +#include + +static u32 +nvbios_vpstate_offset(struct nvkm_bios *b) +{ + struct bit_entry bit_P; + + if (!bit_entry(b, 'P', &bit_P)) { + if (bit_P.version == 2) + return nvbios_rd32(b, bit_P.offset + 0x38); + } + + return 0x0000; +} + +int +nvbios_vpstate_parse(struct nvkm_bios *b, struct nvbios_vpstate_header *h) +{ + if (!h) + return -EINVAL; + + h->offset = nvbios_vpstate_offset(b); + if (!h->offset) + return -ENODEV; + + h->version = nvbios_rd08(b, h->offset); + switch (h->version) { + case 0x10: + h->hlen = nvbios_rd08(b, h->offset + 0x1); + h->elen = nvbios_rd08(b, h->offset + 0x2); + h->slen = nvbios_rd08(b, h->offset + 0x3); + h->scount = nvbios_rd08(b, h->offset + 0x4); + h->ecount = nvbios_rd08(b, h->offset + 0x5); + + h->base_id = nvbios_rd08(b, h->offset + 0x0f); + h->boost_id = nvbios_rd08(b, h->offset + 0x10); + h->tdp_id = nvbios_rd08(b, h->offset + 0x11); + return 0; + default: + return -EINVAL; + } +} + +int +nvbios_vpstate_entry(struct nvkm_bios *b, struct nvbios_vpstate_header *h, + u8 idx, struct nvbios_vpstate_entry *e) +{ + u32 offset; + + if (!e || !h || idx > h->ecount) + return -EINVAL; + + offset = h->offset + h->hlen + idx * (h->elen + (h->slen * h->scount)); + e->pstate = nvbios_rd08(b, offset); + e->clock_mhz = nvbios_rd16(b, offset + 0x5); + return 0; +}