diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/dcb.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/bios/dcb.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/dcb.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/dcb.c new file mode 100644 index 000000000000..8d78140f9401 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/dcb.c @@ -0,0 +1,234 @@ +/* + * 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/dcb.h> + +#include <core/device.h> + +u16 +dcb_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) +{ + struct nvkm_device *device = nv_device(bios); + u16 dcb = 0x0000; + + if (device->card_type > NV_04) + dcb = nv_ro16(bios, 0x36); + if (!dcb) { + nv_warn(bios, "DCB table not found\n"); + return dcb; + } + + *ver = nv_ro08(bios, dcb); + + if (*ver >= 0x42) { + nv_warn(bios, "DCB version 0x%02x unknown\n", *ver); + return 0x0000; + } else + if (*ver >= 0x30) { + if (nv_ro32(bios, dcb + 6) == 0x4edcbdcb) { + *hdr = nv_ro08(bios, dcb + 1); + *cnt = nv_ro08(bios, dcb + 2); + *len = nv_ro08(bios, dcb + 3); + return dcb; + } + } else + if (*ver >= 0x20) { + if (nv_ro32(bios, dcb + 4) == 0x4edcbdcb) { + u16 i2c = nv_ro16(bios, dcb + 2); + *hdr = 8; + *cnt = (i2c - dcb) / 8; + *len = 8; + return dcb; + } + } else + if (*ver >= 0x15) { + if (!nv_memcmp(bios, dcb - 7, "DEV_REC", 7)) { + u16 i2c = nv_ro16(bios, dcb + 2); + *hdr = 4; + *cnt = (i2c - dcb) / 10; + *len = 10; + return dcb; + } + } else { + /* + * v1.4 (some NV15/16, NV11+) seems the same as v1.5, but + * always has the same single (crt) entry, even when tv-out + * present, so the conclusion is this version cannot really + * be used. + * + * v1.2 tables (some NV6/10, and NV15+) normally have the + * same 5 entries, which are not specific to the card and so + * no use. + * + * v1.2 does have an I2C table that read_dcb_i2c_table can + * handle, but cards exist (nv11 in #14821) with a bad i2c + * table pointer, so use the indices parsed in + * parse_bmp_structure. + * + * v1.1 (NV5+, maybe some NV4) is entirely unhelpful + */ + nv_warn(bios, "DCB contains no useful data\n"); + return 0x0000; + } + + nv_warn(bios, "DCB header validation failed\n"); + return 0x0000; +} + +u16 +dcb_outp(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len) +{ + u8 hdr, cnt; + u16 dcb = dcb_table(bios, ver, &hdr, &cnt, len); + if (dcb && idx < cnt) + return dcb + hdr + (idx * *len); + return 0x0000; +} + +static inline u16 +dcb_outp_hasht(struct dcb_output *outp) +{ + return (outp->extdev << 8) | (outp->location << 4) | outp->type; +} + +static inline u16 +dcb_outp_hashm(struct dcb_output *outp) +{ + return (outp->heads << 8) | (outp->link << 6) | outp->or; +} + +u16 +dcb_outp_parse(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len, + struct dcb_output *outp) +{ + u16 dcb = dcb_outp(bios, idx, ver, len); + memset(outp, 0x00, sizeof(*outp)); + if (dcb) { + if (*ver >= 0x20) { + u32 conn = nv_ro32(bios, dcb + 0x00); + outp->or = (conn & 0x0f000000) >> 24; + outp->location = (conn & 0x00300000) >> 20; + outp->bus = (conn & 0x000f0000) >> 16; + outp->connector = (conn & 0x0000f000) >> 12; + outp->heads = (conn & 0x00000f00) >> 8; + outp->i2c_index = (conn & 0x000000f0) >> 4; + outp->type = (conn & 0x0000000f); + outp->link = 0; + } else { + dcb = 0x0000; + } + + if (*ver >= 0x40) { + u32 conf = nv_ro32(bios, dcb + 0x04); + switch (outp->type) { + case DCB_OUTPUT_DP: + switch (conf & 0x00e00000) { + case 0x00000000: + outp->dpconf.link_bw = 0x06; + break; + case 0x00200000: + outp->dpconf.link_bw = 0x0a; + break; + case 0x00400000: + default: + outp->dpconf.link_bw = 0x14; + break; + } + + outp->dpconf.link_nr = (conf & 0x0f000000) >> 24; + if (*ver < 0x41) { + switch (outp->dpconf.link_nr) { + case 0x0f: + outp->dpconf.link_nr = 4; + break; + case 0x03: + outp->dpconf.link_nr = 2; + break; + case 0x01: + default: + outp->dpconf.link_nr = 1; + break; + } + } + + /* fall-through... */ + case DCB_OUTPUT_TMDS: + case DCB_OUTPUT_LVDS: + outp->link = (conf & 0x00000030) >> 4; + outp->sorconf.link = outp->link; /*XXX*/ + outp->extdev = 0x00; + if (outp->location != 0) + outp->extdev = (conf & 0x0000ff00) >> 8; + break; + default: + break; + } + } + + outp->hasht = dcb_outp_hasht(outp); + outp->hashm = dcb_outp_hashm(outp); + } + return dcb; +} + +u16 +dcb_outp_match(struct nvkm_bios *bios, u16 type, u16 mask, + u8 *ver, u8 *len, struct dcb_output *outp) +{ + u16 dcb, idx = 0; + while ((dcb = dcb_outp_parse(bios, idx++, ver, len, outp))) { + if ((dcb_outp_hasht(outp) & 0x00ff) == (type & 0x00ff)) { + if ((dcb_outp_hashm(outp) & mask) == mask) + break; + } + } + return dcb; +} + +int +dcb_outp_foreach(struct nvkm_bios *bios, void *data, + int (*exec)(struct nvkm_bios *, void *, int, u16)) +{ + int ret, idx = -1; + u8 ver, len; + u16 outp; + + while ((outp = dcb_outp(bios, ++idx, &ver, &len))) { + if (nv_ro32(bios, outp) == 0x00000000) + break; /* seen on an NV11 with DCB v1.5 */ + if (nv_ro32(bios, outp) == 0xffffffff) + break; /* seen on an NV17 with DCB v2.0 */ + + if (nv_ro08(bios, outp) == DCB_OUTPUT_UNUSED) + continue; + if (nv_ro08(bios, outp) == DCB_OUTPUT_EOL) + break; + + ret = exec(bios, data, idx, outp); + if (ret) + return ret; + } + + return 0; +} |