dcb.rar_If...

/* * 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 "core/device.h" #include "subdev/bios.h" #include "subdev/bios/dcb.h" u16 dcb_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) { struct nouveau_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 nouveau_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 nouveau_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 nouveau_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 nouveau_bios *bios, void *data, int (*exec)(struct nouveau_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; }