drivers/gpu/drm/nouveau/nvkm/engine/disp/dacnv50.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
  26 #include <subdev/timer.h>
  27
  28 static void
  29 nv50_dac_clock(struct nvkm_ior *dac)
  30 {
  31         struct nvkm_device *device = dac->disp->engine.subdev.device;
  32         const u32 doff = nv50_ior_base(dac);
  33         nvkm_mask(device, 0x614280 + doff, 0x07070707, 0x00000000);
  34 }
  35
  36 int
  37 nv50_dac_sense(struct nvkm_ior *dac, u32 loadval)
  38 {
  39         struct nvkm_device *device = dac->disp->engine.subdev.device;
  40         const u32 doff = nv50_ior_base(dac);
  41
  42         dac->func->power(dac, false, true, false, false, false);
  43
  44         nvkm_wr32(device, 0x61a00c + doff, 0x00100000 | loadval);
  45         mdelay(9);
  46         udelay(500);
  47         loadval = nvkm_mask(device, 0x61a00c + doff, 0xffffffff, 0x00000000);
  48
  49         dac->func->power(dac, false, false, false, false, false);
  50         if (!(loadval & 0x80000000))
  51                 return -ETIMEDOUT;
  52
  53         return (loadval & 0x38000000) >> 27;
  54 }
  55
  56 static void
  57 nv50_dac_power_wait(struct nvkm_device *device, const u32 doff)
  58 {
  59         nvkm_msec(device, 2000,
  60                 if (!(nvkm_rd32(device, 0x61a004 + doff) & 0x80000000))
  61                         break;
  62         );
  63 }
  64
  65 void
  66 nv50_dac_power(struct nvkm_ior *dac, bool normal, bool pu,
  67                bool data, bool vsync, bool hsync)
  68 {
  69         struct nvkm_device *device = dac->disp->engine.subdev.device;
  70         const u32  doff = nv50_ior_base(dac);
  71         const u32 shift = normal ? 0 : 16;
  72         const u32 state = 0x80000000 | (0x00000040 * !    pu |
  73                                         0x00000010 * !  data |
  74                                         0x00000004 * ! vsync |
  75                                         0x00000001 * ! hsync) << shift;
  76         const u32 field = 0xc0000000 | (0x00000055 << shift);
  77
  78         nv50_dac_power_wait(device, doff);
  79         nvkm_mask(device, 0x61a004 + doff, field, state);
  80         nv50_dac_power_wait(device, doff);
  81 }
  82
  83 static void
  84 nv50_dac_state(struct nvkm_ior *dac, struct nvkm_ior_state *state)
  85 {
  86         struct nvkm_device *device = dac->disp->engine.subdev.device;
  87         const u32 coff = dac->id * 8 + (state == &dac->arm) * 4;
  88         u32 ctrl = nvkm_rd32(device, 0x610b58 + coff);
  89
  90         state->proto_evo = (ctrl & 0x00000f00) >> 8;
  91         switch (state->proto_evo) {
  92         case 0: state->proto = CRT; break;
  93         default:
  94                 state->proto = UNKNOWN;
  95                 break;
  96         }
  97
  98         state->head = ctrl & 0x00000003;
  99 }
 100
 101 static const struct nvkm_ior_func
 102 nv50_dac = {
 103         .state = nv50_dac_state,
 104         .power = nv50_dac_power,
 105         .sense = nv50_dac_sense,
 106         .clock = nv50_dac_clock,
 107 };
 108
 109 int
 110 nv50_dac_new(struct nvkm_disp *disp, int id)
 111 {
 112         struct nvkm_device *device = disp->engine.subdev.device;
 113         if (!(nvkm_rd32(device, 0x610184) & (0x00100000 << id)))
 114                 return 0;
 115         return nvkm_ior_new_(&nv50_dac, disp, DAC, id);
 116 }