diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/mxm.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/bios/mxm.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/mxm.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/mxm.c new file mode 100644 index 000000000000..c4087df4f85e --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/mxm.c @@ -0,0 +1,134 @@ +/* + * Copyright 2012 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 <subdev/bios.h> +#include <subdev/bios/bit.h> +#include <subdev/bios/mxm.h> + +u16 +mxm_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr) +{ + struct bit_entry x; + + if (bit_entry(bios, 'x', &x)) { + nv_debug(bios, "BIT 'x' table not present\n"); + return 0x0000; + } + + *ver = x.version; + *hdr = x.length; + if (*ver != 1 || *hdr < 3) { + nv_warn(bios, "BIT 'x' table %d/%d unknown\n", *ver, *hdr); + return 0x0000; + } + + return x.offset; +} + +/* These map MXM v2.x digital connection values to the appropriate SOR/link, + * hopefully they're correct for all boards within the same chipset... + * + * MXM v3.x VBIOS are nicer and provide pointers to these tables. + */ +static u8 g84_sor_map[16] = { + 0x00, 0x12, 0x22, 0x11, 0x32, 0x31, 0x11, 0x31, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 +}; + +static u8 g92_sor_map[16] = { + 0x00, 0x12, 0x22, 0x11, 0x32, 0x31, 0x11, 0x31, + 0x11, 0x31, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 +}; + +static u8 g94_sor_map[16] = { + 0x00, 0x14, 0x24, 0x11, 0x34, 0x31, 0x11, 0x31, + 0x11, 0x31, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00 +}; + +static u8 g98_sor_map[16] = { + 0x00, 0x14, 0x12, 0x11, 0x00, 0x31, 0x11, 0x31, + 0x11, 0x31, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 +}; + +u8 +mxm_sor_map(struct nvkm_bios *bios, u8 conn) +{ + u8 ver, hdr; + u16 mxm = mxm_table(bios, &ver, &hdr); + if (mxm && hdr >= 6) { + u16 map = nv_ro16(bios, mxm + 4); + if (map) { + ver = nv_ro08(bios, map); + if (ver == 0x10) { + if (conn < nv_ro08(bios, map + 3)) { + map += nv_ro08(bios, map + 1); + map += conn; + return nv_ro08(bios, map); + } + + return 0x00; + } + + nv_warn(bios, "unknown sor map v%02x\n", ver); + } + } + + if (bios->version.chip == 0x84 || bios->version.chip == 0x86) + return g84_sor_map[conn]; + if (bios->version.chip == 0x92) + return g92_sor_map[conn]; + if (bios->version.chip == 0x94 || bios->version.chip == 0x96) + return g94_sor_map[conn]; + if (bios->version.chip == 0x98) + return g98_sor_map[conn]; + + nv_warn(bios, "missing sor map\n"); + return 0x00; +} + +u8 +mxm_ddc_map(struct nvkm_bios *bios, u8 port) +{ + u8 ver, hdr; + u16 mxm = mxm_table(bios, &ver, &hdr); + if (mxm && hdr >= 8) { + u16 map = nv_ro16(bios, mxm + 6); + if (map) { + ver = nv_ro08(bios, map); + if (ver == 0x10) { + if (port < nv_ro08(bios, map + 3)) { + map += nv_ro08(bios, map + 1); + map += port; + return nv_ro08(bios, map); + } + + return 0x00; + } + + nv_warn(bios, "unknown ddc map v%02x\n", ver); + } + } + + /* v2.x: directly write port as dcb i2cidx */ + return (port << 4) | port; +} |