drivers/gpu/drm/nouveau/nvkm/subdev/mxm/nv50.c

   1 /*
   2  * Copyright 2011 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 #include "mxms.h"
  25
  26 #include <subdev/bios.h>
  27 #include <subdev/bios/conn.h>
  28 #include <subdev/bios/dcb.h>
  29 #include <subdev/bios/mxm.h>
  30
  31 struct nv50_mxm_priv {
  32         struct nvkm_mxm base;
  33 };
  34
  35 struct context {
  36         u32 *outp;
  37         struct mxms_odev desc;
  38 };
  39
  40 static bool
  41 mxm_match_tmds_partner(struct nvkm_mxm *mxm, u8 *data, void *info)
  42 {
  43         struct context *ctx = info;
  44         struct mxms_odev desc;
  45
  46         mxms_output_device(mxm, data, &desc);
  47         if (desc.outp_type == 2 &&
  48             desc.dig_conn == ctx->desc.dig_conn)
  49                 return false;
  50         return true;
  51 }
  52
  53 static bool
  54 mxm_match_dcb(struct nvkm_mxm *mxm, u8 *data, void *info)
  55 {
  56         struct nvkm_bios *bios = nvkm_bios(mxm);
  57         struct context *ctx = info;
  58         u64 desc = *(u64 *)data;
  59
  60         mxms_output_device(mxm, data, &ctx->desc);
  61
  62         /* match dcb encoder type to mxm-ods device type */
  63         if ((ctx->outp[0] & 0x0000000f) != ctx->desc.outp_type)
  64                 return true;
  65
  66         /* digital output, have some extra stuff to match here, there's a
  67          * table in the vbios that provides a mapping from the mxm digital
  68          * connection enum values to SOR/link
  69          */
  70         if ((desc & 0x00000000000000f0) >= 0x20) {
  71                 /* check against sor index */
  72                 u8 link = mxm_sor_map(bios, ctx->desc.dig_conn);
  73                 if ((ctx->outp[0] & 0x0f000000) != (link & 0x0f) << 24)
  74                         return true;
  75
  76                 /* check dcb entry has a compatible link field */
  77                 link = (link & 0x30) >> 4;
  78                 if ((link & ((ctx->outp[1] & 0x00000030) >> 4)) != link)
  79                         return true;
  80         }
  81
  82         /* mark this descriptor accounted for by setting invalid device type,
  83          * except of course some manufactures don't follow specs properly and
  84          * we need to avoid killing off the TMDS function on DP connectors
  85          * if MXM-SIS is missing an entry for it.
  86          */
  87         data[0] &= ~0xf0;
  88         if (ctx->desc.outp_type == 6 && ctx->desc.conn_type == 6 &&
  89             mxms_foreach(mxm, 0x01, mxm_match_tmds_partner, ctx)) {
  90                 data[0] |= 0x20; /* modify descriptor to match TMDS now */
  91         } else {
  92                 data[0] |= 0xf0;
  93         }
  94
  95         return false;
  96 }
  97
  98 static int
  99 mxm_dcb_sanitise_entry(struct nvkm_bios *bios, void *data, int idx, u16 pdcb)
 100 {
 101         struct nvkm_mxm *mxm = data;
 102         struct context ctx = { .outp = (u32 *)(bios->data + pdcb) };
 103         u8 type, i2cidx, link, ver, len;
 104         u8 *conn;
 105
 106         /* look for an output device structure that matches this dcb entry.
 107          * if one isn't found, disable it.
 108          */
 109         if (mxms_foreach(mxm, 0x01, mxm_match_dcb, &ctx)) {
 110                 nv_debug(mxm, "disable %d: 0x%08x 0x%08x\n",
 111                         idx, ctx.outp[0], ctx.outp[1]);
 112                 ctx.outp[0] |= 0x0000000f;
 113                 return 0;
 114         }
 115
 116         /* modify the output's ddc/aux port, there's a pointer to a table
 117          * with the mapping from mxm ddc/aux port to dcb i2c_index in the
 118          * vbios mxm table
 119          */
 120         i2cidx = mxm_ddc_map(bios, ctx.desc.ddc_port);
 121         if ((ctx.outp[0] & 0x0000000f) != DCB_OUTPUT_DP)
 122                 i2cidx = (i2cidx & 0x0f) << 4;
 123         else
 124                 i2cidx = (i2cidx & 0xf0);
 125
 126         if (i2cidx != 0xf0) {
 127                 ctx.outp[0] &= ~0x000000f0;
 128                 ctx.outp[0] |= i2cidx;
 129         }
 130
 131         /* override dcb sorconf.link, based on what mxm data says */
 132         switch (ctx.desc.outp_type) {
 133         case 0x00: /* Analog CRT */
 134         case 0x01: /* Analog TV/HDTV */
 135                 break;
 136         default:
 137                 link = mxm_sor_map(bios, ctx.desc.dig_conn) & 0x30;
 138                 ctx.outp[1] &= ~0x00000030;
 139                 ctx.outp[1] |= link;
 140                 break;
 141         }
 142
 143         /* we may need to fixup various other vbios tables based on what
 144          * the descriptor says the connector type should be.
 145          *
 146          * in a lot of cases, the vbios tables will claim DVI-I is possible,
 147          * and the mxm data says the connector is really HDMI.  another
 148          * common example is DP->eDP.
 149          */
 150         conn  = bios->data;
 151         conn += nvbios_connEe(bios, (ctx.outp[0] & 0x0000f000) >> 12, &ver, &len);
 152         type  = conn[0];
 153         switch (ctx.desc.conn_type) {
 154         case 0x01: /* LVDS */
 155                 ctx.outp[1] |= 0x00000004; /* use_power_scripts */
 156                 /* XXX: modify default link width in LVDS table */
 157                 break;
 158         case 0x02: /* HDMI */
 159                 type = DCB_CONNECTOR_HDMI_1;
 160                 break;
 161         case 0x03: /* DVI-D */
 162                 type = DCB_CONNECTOR_DVI_D;
 163                 break;
 164         case 0x0e: /* eDP, falls through to DPint */
 165                 ctx.outp[1] |= 0x00010000;
 166         case 0x07: /* DP internal, wtf is this?? HP8670w */
 167                 ctx.outp[1] |= 0x00000004; /* use_power_scripts? */
 168                 type = DCB_CONNECTOR_eDP;
 169                 break;
 170         default:
 171                 break;
 172         }
 173
 174         if (mxms_version(mxm) >= 0x0300)
 175                 conn[0] = type;
 176
 177         return 0;
 178 }
 179
 180 static bool
 181 mxm_show_unmatched(struct nvkm_mxm *mxm, u8 *data, void *info)
 182 {
 183         u64 desc = *(u64 *)data;
 184         if ((desc & 0xf0) != 0xf0)
 185                 nv_info(mxm, "unmatched output device 0x%016llx\n", desc);
 186         return true;
 187 }
 188
 189 static void
 190 mxm_dcb_sanitise(struct nvkm_mxm *mxm)
 191 {
 192         struct nvkm_bios *bios = nvkm_bios(mxm);
 193         u8  ver, hdr, cnt, len;
 194         u16 dcb = dcb_table(bios, &ver, &hdr, &cnt, &len);
 195         if (dcb == 0x0000 || ver != 0x40) {
 196                 nv_debug(mxm, "unsupported DCB version\n");
 197                 return;
 198         }
 199
 200         dcb_outp_foreach(bios, mxm, mxm_dcb_sanitise_entry);
 201         mxms_foreach(mxm, 0x01, mxm_show_unmatched, NULL);
 202 }
 203
 204 static int
 205 nv50_mxm_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 206               struct nvkm_oclass *oclass, void *data, u32 size,
 207               struct nvkm_object **pobject)
 208 {
 209         struct nv50_mxm_priv *priv;
 210         int ret;
 211
 212         ret = nvkm_mxm_create(parent, engine, oclass, &priv);
 213         *pobject = nv_object(priv);
 214         if (ret)
 215                 return ret;
 216
 217         if (priv->base.action & MXM_SANITISE_DCB)
 218                 mxm_dcb_sanitise(&priv->base);
 219         return 0;
 220 }
 221
 222 struct nvkm_oclass
 223 nv50_mxm_oclass = {
 224         .handle = NV_SUBDEV(MXM, 0x50),
 225         .ofuncs = &(struct nvkm_ofuncs) {
 226                 .ctor = nv50_mxm_ctor,
 227                 .dtor = _nvkm_mxm_dtor,
 228                 .init = _nvkm_mxm_init,
 229                 .fini = _nvkm_mxm_fini,
 230         },
 231 };