linux-core/nv50_fb.c

   1 /*
   2  * Copyright (C) 2008 Maarten Maathuis.
   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 "nv50_fb.h"
  28 #include "nv50_lut.h"
  29 #include "nv50_crtc.h"
  30 #include "nv50_display.h"
  31
  32 static int nv50_fb_bind(struct nv50_crtc *crtc, struct nv50_fb_info *info)
  33 {
  34         int rval = 0;
  35
  36         NV50_DEBUG("\n");
  37
  38         if (!crtc || !info) {
  39                 DRM_ERROR("crtc %p info %p\n",crtc, info);
  40                 return -EINVAL;
  41         }
  42
  43         if (!info->block || !info->width || !info->height || !info->depth || !info->bpp || !info->pitch) {
  44                 DRM_ERROR("block %p width %d height %d depth %d bpp %d pitch %d\n", info->block, info->width,
  45                         info->height, info->depth, info->bpp, info->pitch);
  46                 return -EINVAL;
  47         }
  48
  49         crtc->fb->block = info->block;
  50         crtc->fb->width = info->width;
  51         crtc->fb->height = info->height;
  52
  53         crtc->fb->y = info->x;
  54         crtc->fb->x = info->y;
  55
  56         crtc->fb->depth = info->depth;
  57         crtc->fb->bpp = info->bpp;
  58
  59         crtc->fb->pitch = info->pitch;
  60
  61         /* update lut if needed */
  62         if (crtc->fb->depth != crtc->lut->depth) {
  63                 int r_size = 0, g_size = 0, b_size = 0;
  64                 uint16_t *r_val, *g_val, *b_val;
  65                 int i;
  66
  67                 switch (crtc->fb->depth) {
  68                         case 15:
  69                                 r_size = 32;
  70                                 g_size = 32;
  71                                 b_size = 32;
  72                                 break;
  73                         case 16:
  74                                 r_size = 32;
  75                                 g_size = 64;
  76                                 b_size = 32;
  77                                 break;
  78                         case 24:
  79                         default:
  80                                 r_size = 256;
  81                                 g_size = 256;
  82                                 b_size = 256;
  83                                 break;
  84                 }
  85
  86                 r_val = kmalloc(r_size * sizeof(uint16_t), GFP_KERNEL);
  87                 g_val = kmalloc(g_size * sizeof(uint16_t), GFP_KERNEL);
  88                 b_val = kmalloc(b_size * sizeof(uint16_t), GFP_KERNEL);
  89
  90                 if (!r_val || !g_val || !b_val)
  91                         return -ENOMEM;
  92
  93                 /* Set the color indices. */
  94                 for (i = 0; i < r_size; i++) {
  95                         r_val[i] = i << 8;
  96                 }
  97                 for (i = 0; i < g_size; i++) {
  98                         g_val[i] = i << 8;
  99                 }
 100                 for (i = 0; i < b_size; i++) {
 101                         b_val[i] = i << 8;
 102                 }
 103
 104                 rval = crtc->lut->set(crtc, r_val, g_val, b_val);
 105
 106                 /* free before returning */
 107                 kfree(r_val);
 108                 kfree(g_val);
 109                 kfree(b_val);
 110
 111                 if (rval != 0)
 112                         return rval;
 113         }
 114
 115         return 0;
 116 }
 117
 118 int nv50_fb_create(struct nv50_crtc *crtc)
 119 {
 120         if (!crtc)
 121                 return -EINVAL;
 122
 123         crtc->fb = kzalloc(sizeof(struct nv50_fb), GFP_KERNEL);
 124
 125         if (!crtc->fb)
 126                 return -ENOMEM;
 127
 128         crtc->fb->bind = nv50_fb_bind;
 129
 130         return 0;
 131 }
 132
 133 int nv50_fb_destroy(struct nv50_crtc *crtc)
 134 {
 135         if (!crtc)
 136                 return -EINVAL;
 137
 138         kfree(crtc->fb);
 139         crtc->fb = NULL;
 140
 141         return 0;
 142 }