LXR linux/drivers/gpu/drm/nouveau/nv30

   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
  32void
  33nv30_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
  44void
  45nv30_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
  53static int
  54calc_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
  64static int
  65calc_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
  78int
  79nv30_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
 113void
 114nv30_fb_takedown(struct drm_device *dev)
 115{
 116}
 117