drivers/gpu/drm/nouveau/nv30_fb.c

   1 /*
   2  * Copyright (C) 2010 Francisco Jerez.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26
  27 #include "drmP.h"
  28 #include "drm.h"
  29 #include "nouveau_drv.h"
  30 #include "nouveau_drm.h"
  31
  32 void
  33 nv30_fb_init_tile_region(struct drm_device *dev, int i, uint32_t addr,
  34                          uint32_t size, uint32_t pitch, uint32_t flags)
  35 {
  36         struct drm_nouveau_private *dev_priv = dev->dev_private;
  37         struct nouveau_tile_reg *tile = &dev_priv->tile.reg[i];
  38
  39         tile->addr = addr | 1;
  40         tile->limit = max(1u, addr + size) - 1;
  41         tile->pitch = pitch;
  42 }
  43
  44 void
  45 nv30_fb_free_tile_region(struct drm_device *dev, int i)
  46 {
  47         struct drm_nouveau_private *dev_priv = dev->dev_private;
  48         struct nouveau_tile_reg *tile = &dev_priv->tile.reg[i];
  49
  50         tile->addr = tile->limit = tile->pitch = 0;
  51 }
  52
  53 static int
  54 calc_bias(struct drm_device *dev, int k, int i, int j)
  55 {
  56         struct drm_nouveau_private *dev_priv = dev->dev_private;
  57         int b = (dev_priv->chipset > 0x30 ?
  58                  nv_rd32(dev, 0x122c + 0x10 * k + 0x4 * j) >> (4 * (i ^ 1)) :
  59                  0) & 0xf;
  60
  61         return 2 * (b & 0x8 ? b - 0x10 : b);
  62 }
  63
  64 static int
  65 calc_ref(struct drm_device *dev, int l, int k, int i)
  66 {
  67         int j, x = 0;
  68
  69         for (j = 0; j < 4; j++) {
  70                 int m = (l >> (8 * i) & 0xff) + calc_bias(dev, k, i, j);
  71
  72                 x |= (0x80 | clamp(m, 0, 0x1f)) << (8 * j);
  73         }
  74
  75         return x;
  76 }
  77
  78 int
  79 nv30_fb_init(struct drm_device *dev)
  80 {
  81         struct drm_nouveau_private *dev_priv = dev->dev_private;
  82         struct nouveau_fb_engine *pfb = &dev_priv->engine.fb;
  83         int i, j;
  84
  85         pfb->num_tiles = NV10_PFB_TILE__SIZE;
  86
  87         /* Turn all the tiling regions off. */
  88         for (i = 0; i < pfb->num_tiles; i++)
  89                 pfb->set_tile_region(dev, i);
  90
  91         /* Init the memory timing regs at 0x10037c/0x1003ac */
  92         if (dev_priv->chipset == 0x30 ||
  93             dev_priv->chipset == 0x31 ||
  94             dev_priv->chipset == 0x35) {
  95                 /* Related to ROP count */
  96                 int n = (dev_priv->chipset == 0x31 ? 2 : 4);
  97                 int l = nv_rd32(dev, 0x1003d0);
  98
  99                 for (i = 0; i < n; i++) {
 100                         for (j = 0; j < 3; j++)
 101                                 nv_wr32(dev, 0x10037c + 0xc * i + 0x4 * j,
 102                                         calc_ref(dev, l, 0, j));
 103
 104                         for (j = 0; j < 2; j++)
 105                                 nv_wr32(dev, 0x1003ac + 0x8 * i + 0x4 * j,
 106                                         calc_ref(dev, l, 1, j));
 107                 }
 108         }
 109
 110         return 0;
 111 }
 112
 113 void
 114 nv30_fb_takedown(struct drm_device *dev)
 115 {
 116 }