drivers/gpu/drm/nouveau/core/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
  25 #include <core/os.h>
  26 #include <core/class.h>
  27
  28 #include <subdev/bios.h>
  29 #include <subdev/bios/dcb.h>
  30 #include <subdev/timer.h>
  31
  32 #include "nv50.h"
  33
  34 int
  35 nv50_dac_power(struct nv50_disp_priv *priv, int or, u32 data)
  36 {
  37         const u32 stat = (data & NV50_DISP_DAC_PWR_HSYNC) |
  38                          (data & NV50_DISP_DAC_PWR_VSYNC) |
  39                          (data & NV50_DISP_DAC_PWR_DATA) |
  40                          (data & NV50_DISP_DAC_PWR_STATE);
  41         const u32 doff = (or * 0x800);
  42         nv_wait(priv, 0x61a004 + doff, 0x80000000, 0x00000000);
  43         nv_mask(priv, 0x61a004 + doff, 0xc000007f, 0x80000000 | stat);
  44         nv_wait(priv, 0x61a004 + doff, 0x80000000, 0x00000000);
  45         return 0;
  46 }
  47
  48 int
  49 nv50_dac_sense(struct nv50_disp_priv *priv, int or, u32 loadval)
  50 {
  51         const u32 doff = (or * 0x800);
  52         int load = -EINVAL;
  53         nv_wr32(priv, 0x61a00c + doff, 0x00100000 | loadval);
  54         mdelay(9);
  55         udelay(500);
  56         nv_wr32(priv, 0x61a00c + doff, 0x80000000);
  57         load = (nv_rd32(priv, 0x61a00c + doff) & 0x38000000) >> 27;
  58         nv_wr32(priv, 0x61a00c + doff, 0x00000000);
  59         return load;
  60 }
  61
  62 int
  63 nv50_dac_mthd(struct nouveau_object *object, u32 mthd, void *args, u32 size)
  64 {
  65         struct nv50_disp_priv *priv = (void *)object->engine;
  66         const u8 or = (mthd & NV50_DISP_DAC_MTHD_OR);
  67         u32 *data = args;
  68         int ret;
  69
  70         if (size < sizeof(u32))
  71                 return -EINVAL;
  72
  73         switch (mthd & ~0x3f) {
  74         case NV50_DISP_DAC_PWR:
  75                 ret = priv->dac.power(priv, or, data[0]);
  76                 break;
  77         case NV50_DISP_DAC_LOAD:
  78                 ret = priv->dac.sense(priv, or, data[0]);
  79                 if (ret >= 0) {
  80                         data[0] = ret;
  81                         ret = 0;
  82                 }
  83                 break;
  84         default:
  85                 BUG_ON(1);
  86         }
  87
  88         return ret;
  89 }