236 lines
6.1 KiB
C
236 lines
6.1 KiB
C
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/*
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* Copyright 2012 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Ben Skeggs
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*/
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#include <subdev/bios.h>
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#include <subdev/bios/dcb.h>
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u16
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dcb_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
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{
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struct nvkm_subdev *subdev = &bios->subdev;
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struct nvkm_device *device = subdev->device;
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u16 dcb = 0x0000;
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if (device->card_type > NV_04)
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dcb = nvbios_rd16(bios, 0x36);
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if (!dcb) {
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nvkm_warn(subdev, "DCB table not found\n");
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return dcb;
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}
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*ver = nvbios_rd08(bios, dcb);
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if (*ver >= 0x42) {
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nvkm_warn(subdev, "DCB version 0x%02x unknown\n", *ver);
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return 0x0000;
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} else
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if (*ver >= 0x30) {
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if (nvbios_rd32(bios, dcb + 6) == 0x4edcbdcb) {
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*hdr = nvbios_rd08(bios, dcb + 1);
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*cnt = nvbios_rd08(bios, dcb + 2);
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*len = nvbios_rd08(bios, dcb + 3);
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return dcb;
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}
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} else
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if (*ver >= 0x20) {
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if (nvbios_rd32(bios, dcb + 4) == 0x4edcbdcb) {
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u16 i2c = nvbios_rd16(bios, dcb + 2);
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*hdr = 8;
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*cnt = (i2c - dcb) / 8;
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*len = 8;
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return dcb;
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}
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} else
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if (*ver >= 0x15) {
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if (!nvbios_memcmp(bios, dcb - 7, "DEV_REC", 7)) {
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u16 i2c = nvbios_rd16(bios, dcb + 2);
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*hdr = 4;
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*cnt = (i2c - dcb) / 10;
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*len = 10;
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return dcb;
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}
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} else {
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/*
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* v1.4 (some NV15/16, NV11+) seems the same as v1.5, but
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* always has the same single (crt) entry, even when tv-out
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* present, so the conclusion is this version cannot really
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* be used.
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*
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* v1.2 tables (some NV6/10, and NV15+) normally have the
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* same 5 entries, which are not specific to the card and so
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* no use.
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*
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* v1.2 does have an I2C table that read_dcb_i2c_table can
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* handle, but cards exist (nv11 in #14821) with a bad i2c
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* table pointer, so use the indices parsed in
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* parse_bmp_structure.
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*
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* v1.1 (NV5+, maybe some NV4) is entirely unhelpful
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*/
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nvkm_debug(subdev, "DCB contains no useful data\n");
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return 0x0000;
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}
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nvkm_warn(subdev, "DCB header validation failed\n");
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return 0x0000;
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}
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u16
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dcb_outp(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len)
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{
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u8 hdr, cnt;
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u16 dcb = dcb_table(bios, ver, &hdr, &cnt, len);
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if (dcb && idx < cnt)
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return dcb + hdr + (idx * *len);
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return 0x0000;
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}
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static inline u16
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dcb_outp_hasht(struct dcb_output *outp)
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{
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return (outp->extdev << 8) | (outp->location << 4) | outp->type;
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}
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static inline u16
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dcb_outp_hashm(struct dcb_output *outp)
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{
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return (outp->heads << 8) | (outp->link << 6) | outp->or;
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}
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u16
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dcb_outp_parse(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len,
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struct dcb_output *outp)
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{
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u16 dcb = dcb_outp(bios, idx, ver, len);
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memset(outp, 0x00, sizeof(*outp));
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if (dcb) {
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if (*ver >= 0x20) {
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u32 conn = nvbios_rd32(bios, dcb + 0x00);
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outp->or = (conn & 0x0f000000) >> 24;
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outp->location = (conn & 0x00300000) >> 20;
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outp->bus = (conn & 0x000f0000) >> 16;
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outp->connector = (conn & 0x0000f000) >> 12;
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outp->heads = (conn & 0x00000f00) >> 8;
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outp->i2c_index = (conn & 0x000000f0) >> 4;
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outp->type = (conn & 0x0000000f);
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outp->link = 0;
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} else {
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dcb = 0x0000;
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}
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if (*ver >= 0x40) {
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u32 conf = nvbios_rd32(bios, dcb + 0x04);
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switch (outp->type) {
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case DCB_OUTPUT_DP:
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switch (conf & 0x00e00000) {
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case 0x00000000: /* 1.62 */
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outp->dpconf.link_bw = 0x06;
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break;
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case 0x00200000: /* 2.7 */
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outp->dpconf.link_bw = 0x0a;
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break;
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case 0x00400000: /* 5.4 */
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outp->dpconf.link_bw = 0x14;
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break;
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case 0x00600000: /* 8.1 */
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default:
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outp->dpconf.link_bw = 0x1e;
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break;
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}
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switch ((conf & 0x0f000000) >> 24) {
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case 0xf:
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case 0x4:
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outp->dpconf.link_nr = 4;
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break;
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case 0x3:
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case 0x2:
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outp->dpconf.link_nr = 2;
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break;
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case 0x1:
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default:
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outp->dpconf.link_nr = 1;
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break;
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}
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fallthrough;
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case DCB_OUTPUT_TMDS:
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case DCB_OUTPUT_LVDS:
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outp->link = (conf & 0x00000030) >> 4;
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outp->sorconf.link = outp->link; /*XXX*/
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outp->extdev = 0x00;
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if (outp->location != 0)
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outp->extdev = (conf & 0x0000ff00) >> 8;
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break;
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default:
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break;
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}
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}
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outp->hasht = dcb_outp_hasht(outp);
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outp->hashm = dcb_outp_hashm(outp);
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}
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return dcb;
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}
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u16
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dcb_outp_match(struct nvkm_bios *bios, u16 type, u16 mask,
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u8 *ver, u8 *len, struct dcb_output *outp)
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{
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u16 dcb, idx = 0;
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while ((dcb = dcb_outp_parse(bios, idx++, ver, len, outp))) {
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if ((dcb_outp_hasht(outp) & 0x00ff) == (type & 0x00ff)) {
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if ((dcb_outp_hashm(outp) & mask) == mask)
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break;
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}
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}
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return dcb;
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}
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int
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dcb_outp_foreach(struct nvkm_bios *bios, void *data,
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int (*exec)(struct nvkm_bios *, void *, int, u16))
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{
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int ret, idx = -1;
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u8 ver, len;
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u16 outp;
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while ((outp = dcb_outp(bios, ++idx, &ver, &len))) {
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if (nvbios_rd32(bios, outp) == 0x00000000)
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break; /* seen on an NV11 with DCB v1.5 */
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if (nvbios_rd32(bios, outp) == 0xffffffff)
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break; /* seen on an NV17 with DCB v2.0 */
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if (nvbios_rd08(bios, outp) == DCB_OUTPUT_UNUSED)
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continue;
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if (nvbios_rd08(bios, outp) == DCB_OUTPUT_EOL)
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break;
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ret = exec(bios, data, idx, outp);
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if (ret)
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return ret;
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}
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return 0;
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}
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