drivers/gpu/drm/nouveau/nvkm/engine/disp/piornv50.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 #include "ior.h"
  25 #include "head.h"
  26
  27 #include <subdev/i2c.h>
  28 #include <subdev/timer.h>
  29
  30 static void
  31 nv50_pior_clock(struct nvkm_ior *pior)
  32 {
  33         struct nvkm_device *device = pior->disp->engine.subdev.device;
  34         const u32 poff = nv50_ior_base(pior);
  35         nvkm_mask(device, 0x614380 + poff, 0x00000707, 0x00000001);
  36 }
  37
  38 static int
  39 nv50_pior_dp_links(struct nvkm_ior *pior, struct nvkm_i2c_aux *aux)
  40 {
  41         int ret = nvkm_i2c_aux_lnk_ctl(aux, pior->dp.nr, pior->dp.bw,
  42                                             pior->dp.ef);
  43         if (ret)
  44                 return ret;
  45         return 1;
  46 }
  47
  48 static void
  49 nv50_pior_power_wait(struct nvkm_device *device, u32 poff)
  50 {
  51         nvkm_msec(device, 2000,
  52                 if (!(nvkm_rd32(device, 0x61e004 + poff) & 0x80000000))
  53                         break;
  54         );
  55 }
  56
  57 static void
  58 nv50_pior_power(struct nvkm_ior *pior, bool normal, bool pu,
  59                bool data, bool vsync, bool hsync)
  60 {
  61         struct nvkm_device *device = pior->disp->engine.subdev.device;
  62         const u32  poff = nv50_ior_base(pior);
  63         const u32 shift = normal ? 0 : 16;
  64         const u32 state = 0x80000000 | (0x00000001 * !!pu) << shift;
  65         const u32 field = 0x80000000 | (0x00000101 << shift);
  66
  67         nv50_pior_power_wait(device, poff);
  68         nvkm_mask(device, 0x61e004 + poff, field, state);
  69         nv50_pior_power_wait(device, poff);
  70 }
  71
  72 void
  73 nv50_pior_depth(struct nvkm_ior *ior, struct nvkm_ior_state *state, u32 ctrl)
  74 {
  75         /* GF119 moves this information to per-head methods, which is
  76          * a lot more convenient, and where our shared code expect it.
  77          */
  78         if (state->head && state == &ior->asy) {
  79                 struct nvkm_head *head =
  80                         nvkm_head_find(ior->disp, __ffs(state->head));
  81                 if (!WARN_ON(!head)) {
  82                         struct nvkm_head_state *state = &head->asy;
  83                         switch ((ctrl & 0x000f0000) >> 16) {
  84                         case 6: state->or.depth = 30; break;
  85                         case 5: state->or.depth = 24; break;
  86                         case 2: state->or.depth = 18; break;
  87                         case 0: state->or.depth = 18; break; /*XXX*/
  88                         default:
  89                                 state->or.depth = 18;
  90                                 WARN_ON(1);
  91                                 break;
  92                         }
  93                 }
  94         }
  95 }
  96
  97 static void
  98 nv50_pior_state(struct nvkm_ior *pior, struct nvkm_ior_state *state)
  99 {
 100         struct nvkm_device *device = pior->disp->engine.subdev.device;
 101         const u32 coff = pior->id * 8 + (state == &pior->arm) * 4;
 102         u32 ctrl = nvkm_rd32(device, 0x610b80 + coff);
 103
 104         state->proto_evo = (ctrl & 0x00000f00) >> 8;
 105         state->rgdiv = 1;
 106         switch (state->proto_evo) {
 107         case 0: state->proto = TMDS; break;
 108         default:
 109                 state->proto = UNKNOWN;
 110                 break;
 111         }
 112
 113         state->head = ctrl & 0x00000003;
 114         nv50_pior_depth(pior, state, ctrl);
 115 }
 116
 117 static const struct nvkm_ior_func
 118 nv50_pior = {
 119         .state = nv50_pior_state,
 120         .power = nv50_pior_power,
 121         .clock = nv50_pior_clock,
 122         .dp = {
 123                 .links = nv50_pior_dp_links,
 124         },
 125 };
 126
 127 int
 128 nv50_pior_new(struct nvkm_disp *disp, int id)
 129 {
 130         struct nvkm_device *device = disp->engine.subdev.device;
 131         if (!(nvkm_rd32(device, 0x610184) & (0x10000000 << id)))
 132                 return 0;
 133         return nvkm_ior_new_(&nv50_pior, disp, PIOR, id);
 134 }