LXR linux/drivers/gpu/drm/nouveau/core/subdev/bios/disp.c

   1/*
   2 * Copyright 2012 Red Hat Inc.
   3 *
   4 * Permission is hereby granted, free of charge, to any person obtaining a
   5 * copy of this software and associated documentation files (the "Software"),
   6 * to deal in the Software without restriction, including without limitation
   7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 * and/or sell copies of the Software, and to permit persons to whom the
   9 * Software is furnished to do so, subject to the following conditions:
  10 *
  11 * The above copyright notice and this permission notice shall be included in
  12 * all copies or substantial portions of the Software.
  13 *
  14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20 * OTHER DEALINGS IN THE SOFTWARE.
  21 *
  22 * Authors: Ben Skeggs
  23 */
  24
  25#include <subdev/bios.h>
  26#include <subdev/bios/bit.h>
  27#include <subdev/bios/disp.h>
  28
  29u16
  30nvbios_disp_table(struct nouveau_bios *bios,
  31                  u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *sub)
  32{
  33        struct bit_entry U;
  34
  35        if (!bit_entry(bios, 'U', &U)) {
  36                if (U.version == 1) {
  37                        u16 data = nv_ro16(bios, U.offset);
  38                        if (data) {
  39                                *ver = nv_ro08(bios, data + 0x00);
  40                                switch (*ver) {
  41                                case 0x20:
  42                                case 0x21:
  43                                        *hdr = nv_ro08(bios, data + 0x01);
  44                                        *len = nv_ro08(bios, data + 0x02);
  45                                        *cnt = nv_ro08(bios, data + 0x03);
  46                                        *sub = nv_ro08(bios, data + 0x04);
  47                                        return data;
  48                                default:
  49                                        break;
  50                                }
  51                        }
  52                }
  53        }
  54
  55        return 0x0000;
  56}
  57
  58u16
  59nvbios_disp_entry(struct nouveau_bios *bios, u8 idx,
  60                  u8 *ver, u8 *len, u8 *sub)
  61{
  62        u8  hdr, cnt;
  63        u16 data = nvbios_disp_table(bios, ver, &hdr, &cnt, len, sub);
  64        if (data && idx < cnt)
  65                return data + hdr + (idx * *len);
  66        *ver = 0x00;
  67        return 0x0000;
  68}
  69
  70u16
  71nvbios_disp_parse(struct nouveau_bios *bios, u8 idx,
  72                  u8 *ver, u8 *len, u8 *sub,
  73                  struct nvbios_disp *info)
  74{
  75        u16 data = nvbios_disp_entry(bios, idx, ver, len, sub);
  76        if (data && *len >= 2) {
  77                info->data = nv_ro16(bios, data + 0);
  78                return data;
  79        }
  80        return 0x0000;
  81}
  82
  83u16
  84nvbios_outp_entry(struct nouveau_bios *bios, u8 idx,
  85                  u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
  86{
  87        struct nvbios_disp info;
  88        u16 data = nvbios_disp_parse(bios, idx, ver, len, hdr, &info);
  89        if (data) {
  90                *cnt = nv_ro08(bios, info.data + 0x05);
  91                *len = 0x06;
  92                data = info.data;
  93        }
  94        return data;
  95}
  96
  97u16
  98nvbios_outp_parse(struct nouveau_bios *bios, u8 idx,
  99                  u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
 100                  struct nvbios_outp *info)
 101{
 102        u16 data = nvbios_outp_entry(bios, idx, ver, hdr, cnt, len);
 103        if (data && *hdr >= 0x0a) {
 104                info->type      = nv_ro16(bios, data + 0x00);
 105                info->mask      = nv_ro32(bios, data + 0x02);
 106                if (*ver <= 0x20) /* match any link */
 107                        info->mask |= 0x00c0;
 108                info->script[0] = nv_ro16(bios, data + 0x06);
 109                info->script[1] = nv_ro16(bios, data + 0x08);
 110                info->script[2] = 0x0000;
 111                if (*hdr >= 0x0c)
 112                        info->script[2] = nv_ro16(bios, data + 0x0a);
 113                return data;
 114        }
 115        return 0x0000;
 116}
 117
 118u16
 119nvbios_outp_match(struct nouveau_bios *bios, u16 type, u16 mask,
 120                  u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
 121                  struct nvbios_outp *info)
 122{
 123        u16 data, idx = 0;
 124        while ((data = nvbios_outp_parse(bios, idx++, ver, hdr, cnt, len, info)) || *ver) {
 125                if (data && info->type == type) {
 126                        if ((info->mask & mask) == mask)
 127                                break;
 128                }
 129        }
 130        return data;
 131}
 132
 133u16
 134nvbios_ocfg_entry(struct nouveau_bios *bios, u16 outp, u8 idx,
 135                  u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
 136{
 137        if (idx < *cnt)
 138                return outp + *hdr + (idx * *len);
 139        return 0x0000;
 140}
 141
 142u16
 143nvbios_ocfg_parse(struct nouveau_bios *bios, u16 outp, u8 idx,
 144                  u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
 145                  struct nvbios_ocfg *info)
 146{
 147        u16 data = nvbios_ocfg_entry(bios, outp, idx, ver, hdr, cnt, len);
 148        if (data) {
 149                info->match     = nv_ro16(bios, data + 0x00);
 150                info->clkcmp[0] = nv_ro16(bios, data + 0x02);
 151                info->clkcmp[1] = nv_ro16(bios, data + 0x04);
 152        }
 153        return data;
 154}
 155
 156u16
 157nvbios_ocfg_match(struct nouveau_bios *bios, u16 outp, u16 type,
 158                  u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
 159                  struct nvbios_ocfg *info)
 160{
 161        u16 data, idx = 0;
 162        while ((data = nvbios_ocfg_parse(bios, outp, idx++, ver, hdr, cnt, len, info))) {
 163                if (info->match == type)
 164                        break;
 165        }
 166        return data;
 167}
 168
 169u16
 170nvbios_oclk_match(struct nouveau_bios *bios, u16 cmp, u32 khz)
 171{
 172        while (cmp) {
 173                if (khz / 10 >= nv_ro16(bios, cmp + 0x00))
 174                        return  nv_ro16(bios, cmp + 0x02);
 175                cmp += 0x04;
 176        }
 177        return 0x0000;
 178}
 179