linux-core/radeon_ms_fb.c

   1 /*
   2  * Copyright © 2007 David Airlie
   3  * Copyright © 2007 Jerome Glisse
   4  *
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining
   8  * a copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation on the rights to use, copy, modify, merge,
  11  * publish, distribute, sublicense, and/or sell copies of the Software,
  12  * and to permit persons to whom the Software is furnished to do so,
  13  * subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial
  17  * portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  20  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  22  * NON-INFRINGEMENT.  IN NO EVENT SHALL ATI, VA LINUX SYSTEMS AND/OR
  23  * THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  24  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  26  * DEALINGS IN THE SOFTWARE.
  27  */
  28 #include <linux/module.h>
  29 #include <linux/kernel.h>
  30 #include <linux/errno.h>
  31 #include <linux/string.h>
  32 #include <linux/mm.h>
  33 #include <linux/tty.h>
  34 #include <linux/slab.h>
  35 #include <linux/delay.h>
  36 #include <linux/fb.h>
  37 #include <linux/init.h>
  38
  39 #include "drmP.h"
  40 #include "drm.h"
  41 #include "drm_crtc.h"
  42 #include "radeon_ms.h"
  43
  44 struct radeonfb_par {
  45         struct drm_device       *dev;
  46         struct drm_crtc         *crtc;
  47         struct drm_display_mode *fb_mode;
  48 };
  49
  50 static int radeonfb_setcolreg(unsigned regno, unsigned red,
  51                                unsigned green, unsigned blue,
  52                                unsigned transp, struct fb_info *info)
  53 {
  54         struct radeonfb_par *par = info->par;
  55         struct drm_framebuffer *fb = par->crtc->fb;
  56         struct drm_crtc *crtc = par->crtc;
  57
  58         if (regno > 255) {
  59                 return 1;
  60         }
  61         if (crtc->funcs->gamma_set) {
  62                 crtc->funcs->gamma_set(crtc, red, green, blue, regno);
  63         }
  64         if (regno < 16) {
  65                 switch (fb->depth) {
  66                 case 15:
  67                         fb->pseudo_palette[regno] = ((red & 0xf800) >>  1) |
  68                                 ((green & 0xf800) >>  6) |
  69                                 ((blue & 0xf800) >> 11);
  70                         break;
  71                 case 16:
  72                         fb->pseudo_palette[regno] = (red & 0xf800) |
  73                                 ((green & 0xfc00) >>  5) |
  74                                 ((blue  & 0xf800) >> 11);
  75                         break;
  76                 case 24:
  77                 case 32:
  78                         fb->pseudo_palette[regno] = ((red & 0xff00) << 8) |
  79                                 (green & 0xff00) |
  80                                 ((blue  & 0xff00) >> 8);
  81                         break;
  82                 }
  83         }
  84         return 0;
  85 }
  86
  87 static int radeonfb_check_var(struct fb_var_screeninfo *var,
  88                                struct fb_info *info)
  89 {
  90         struct radeonfb_par *par = info->par;
  91         struct drm_framebuffer *fb = par->crtc->fb;
  92
  93         if (!var->pixclock)
  94                 return -EINVAL;
  95
  96         /* Need to resize the fb object !!! */
  97         if (var->xres > fb->width || var->yres > fb->height) {
  98                 DRM_ERROR("Requested width/height is greater than "
  99                           "current fb object %dx%d > %dx%d\n",
 100                           var->xres, var->yres, fb->width, fb->height);
 101                 DRM_ERROR("Need resizing code.\n");
 102                 return -EINVAL;
 103         }
 104
 105         switch (var->bits_per_pixel) {
 106         case 16:
 107                 if (var->green.length == 5) {
 108                         var->red.offset = 10;
 109                         var->green.offset = 5;
 110                         var->blue.offset = 0;
 111                         var->red.length = 5;
 112                         var->green.length = 5;
 113                         var->blue.length = 5;
 114                         var->transp.length = 0;
 115                         var->transp.offset = 0;
 116                 } else {
 117                         var->red.offset = 11;
 118                         var->green.offset = 6;
 119                         var->blue.offset = 0;
 120                         var->red.length = 5;
 121                         var->green.length = 6;
 122                         var->blue.length = 5;
 123                         var->transp.length = 0;
 124                         var->transp.offset = 0;
 125                 }
 126                 break;
 127         case 32:
 128                 if (var->transp.length) {
 129                         var->red.offset = 16;
 130                         var->green.offset = 8;
 131                         var->blue.offset = 0;
 132                         var->red.length = 8;
 133                         var->green.length = 8;
 134                         var->blue.length = 8;
 135                         var->transp.length = 8;
 136                         var->transp.offset = 24;
 137                 } else {
 138                         var->red.offset = 16;
 139                         var->green.offset = 8;
 140                         var->blue.offset = 0;
 141                         var->red.length = 8;
 142                         var->green.length = 8;
 143                         var->blue.length = 8;
 144                         var->transp.length = 0;
 145                         var->transp.offset = 0;
 146                 }
 147                 break;
 148         default:
 149                 return -EINVAL;
 150         }
 151         return 0;
 152 }
 153
 154 static bool radeonfb_mode_equal(struct drm_display_mode *mode1,
 155                                 struct drm_display_mode *mode2)
 156 {
 157         if (mode1->hdisplay == mode2->hdisplay &&
 158             mode1->hsync_start == mode2->hsync_start &&
 159             mode1->hsync_end == mode2->hsync_end &&
 160             mode1->htotal == mode2->htotal &&
 161             mode1->hskew == mode2->hskew &&
 162             mode1->vdisplay == mode2->vdisplay &&
 163             mode1->vsync_start == mode2->vsync_start &&
 164             mode1->vsync_end == mode2->vsync_end &&
 165             mode1->vtotal == mode2->vtotal &&
 166             mode1->vscan == mode2->vscan &&
 167             mode1->flags == mode2->flags) {
 168                 /* FIXME: what about adding a margin for clock ? */
 169                 if (mode1->clock == mode2->clock)
 170                         return true;
 171                 return false;
 172         }
 173
 174         return false;
 175 }
 176
 177 static int radeonfb_set_par(struct fb_info *info)
 178 {
 179         struct radeonfb_par *par = info->par;
 180         struct drm_framebuffer *fb = par->crtc->fb;
 181         struct drm_device *dev = par->dev;
 182         struct drm_display_mode *drm_mode, *search_mode;
 183         struct drm_output *output;
 184         struct fb_var_screeninfo *var = &info->var;
 185         int found = 0;
 186
 187         switch (var->bits_per_pixel) {
 188         case 16:
 189                 fb->depth = (var->green.length == 6) ? 16 : 15;
 190                 break;
 191         case 32:
 192                 fb->depth = (var->transp.length > 0) ? 32 : 24;
 193                 break;
 194         default:
 195                 return -EINVAL;
 196         }
 197         fb->bits_per_pixel = var->bits_per_pixel;
 198
 199         info->fix.line_length = fb->pitch;
 200         info->fix.smem_len = info->fix.line_length * fb->height;
 201         info->fix.visual = FB_VISUAL_TRUECOLOR;
 202         info->screen_size = info->fix.smem_len; /* ??? */
 203
 204         /* Should we walk the output's modelist or just create our own ???
 205          * For now, we create and destroy a mode based on the incoming
 206          * parameters. But there's commented out code below which scans
 207          * the output list too.
 208          */
 209         drm_mode = drm_mode_create(dev);
 210         drm_mode->hdisplay = var->xres;
 211         drm_mode->hsync_start = drm_mode->hdisplay + var->right_margin;
 212         drm_mode->hsync_end = drm_mode->hsync_start + var->hsync_len;
 213         drm_mode->htotal = drm_mode->hsync_end + var->left_margin;
 214         drm_mode->vdisplay = var->yres;
 215         drm_mode->vsync_start = drm_mode->vdisplay + var->lower_margin;
 216         drm_mode->vsync_end = drm_mode->vsync_start + var->vsync_len;
 217         drm_mode->vtotal = drm_mode->vsync_end + var->upper_margin;
 218         drm_mode->clock = PICOS2KHZ(var->pixclock);
 219         drm_mode->vrefresh = drm_mode_vrefresh(drm_mode);
 220         drm_mode_set_name(drm_mode);
 221         drm_mode_set_crtcinfo(drm_mode, CRTC_INTERLACE_HALVE_V);
 222
 223         list_for_each_entry(output, &dev->mode_config.output_list, head) {
 224                 if (output->crtc == par->crtc)
 225                         break;
 226         }
 227
 228         drm_mode_debug_printmodeline(dev, drm_mode);
 229         list_for_each_entry(search_mode, &output->modes, head) {
 230                 drm_mode_debug_printmodeline(dev, search_mode);
 231                 if (radeonfb_mode_equal(drm_mode, search_mode)) {
 232                         drm_mode_destroy(dev, drm_mode);
 233                         drm_mode = search_mode;
 234                         found = 1;
 235                         break;
 236                 }
 237         }
 238
 239         if (!found) {
 240                 if (par->fb_mode) {
 241                         drm_mode_detachmode_crtc(dev, par->fb_mode);
 242                 }
 243                 par->fb_mode = drm_mode;
 244                 drm_mode_debug_printmodeline(dev, drm_mode);
 245                 /* attach mode */
 246                 drm_mode_attachmode_crtc(dev, par->crtc, par->fb_mode);
 247         }
 248
 249         if (par->crtc->enabled) {
 250                 if (!drm_mode_equal(&par->crtc->mode, drm_mode)) {
 251                         if (!drm_crtc_set_mode(par->crtc, drm_mode, 0, 0)) {
 252                                 return -EINVAL;
 253                         }
 254                 }
 255         }
 256
 257         return 0;
 258 }
 259
 260 static struct fb_ops radeonfb_ops = {
 261         .owner = THIS_MODULE,
 262         //      .fb_open = radeonfb_open,
 263         //      .fb_read = radeonfb_read,
 264         //      .fb_write = radeonfb_write,
 265         //      .fb_release = radeonfb_release,
 266         //      .fb_ioctl = radeonfb_ioctl,
 267         .fb_check_var = radeonfb_check_var,
 268         .fb_set_par = radeonfb_set_par,
 269         .fb_setcolreg = radeonfb_setcolreg,
 270         .fb_fillrect = cfb_fillrect,
 271         .fb_copyarea = cfb_copyarea,
 272         .fb_imageblit = cfb_imageblit,
 273 };
 274
 275 int radeonfb_probe(struct drm_device *dev, struct drm_crtc *crtc)
 276 {
 277         struct fb_info *info;
 278         struct radeonfb_par *par;
 279         struct device *device = &dev->pdev->dev;
 280         struct drm_framebuffer *fb;
 281         struct drm_display_mode *mode = crtc->desired_mode;
 282         int ret;
 283
 284         info = framebuffer_alloc(sizeof(struct radeonfb_par), device);
 285         if (!info){
 286                 DRM_INFO("[radeon_ms] framebuffer_alloc failed\n");
 287                 return -EINVAL;
 288         }
 289
 290         fb = drm_framebuffer_create(dev);
 291         if (!fb) {
 292                 framebuffer_release(info);
 293                 DRM_ERROR("[radeon_ms] failed to allocate fb.\n");
 294                 return -EINVAL;
 295         }
 296         crtc->fb = fb;
 297
 298         fb->width = crtc->desired_mode->hdisplay;
 299         fb->height = crtc->desired_mode->vdisplay;
 300         fb->bits_per_pixel = 32;
 301         fb->pitch = fb->width * ((fb->bits_per_pixel + 1) / 8);
 302         fb->depth = 24;
 303         /* one page alignment should be fine for constraint (micro|macro tiling,
 304          * bit depth, color buffer offset, ...) */
 305         ret = drm_buffer_object_create(dev, fb->width * fb->height * 4,
 306                                        drm_bo_type_kernel,
 307                                        DRM_BO_FLAG_READ |
 308                                        DRM_BO_FLAG_WRITE |
 309                                        DRM_BO_FLAG_NO_EVICT |
 310                                        DRM_BO_FLAG_MEM_VRAM,
 311                                        DRM_BO_HINT_DONT_FENCE,
 312                                        1,
 313                                        0,
 314                                        &fb->bo);
 315         if (ret || fb->bo == NULL) {
 316                 DRM_ERROR("[radeon_ms] failed to allocate framebuffer\n");
 317                 drm_framebuffer_destroy(fb);
 318                 framebuffer_release(info);
 319                 return -EINVAL;
 320         }
 321
 322         DRM_INFO("[radeon_ms] framebuffer %dx%d at 0x%08lX\n",
 323                  fb->width, fb->height, fb->bo->offset);
 324
 325         fb->fbdev = info;
 326         par = info->par;
 327         par->dev = dev;
 328         par->crtc = crtc;
 329         info->fbops = &radeonfb_ops;
 330         strcpy(info->fix.id, "radeonfb");
 331         info->fix.type = FB_TYPE_PACKED_PIXELS;
 332         info->fix.visual = FB_VISUAL_TRUECOLOR;
 333         info->fix.type_aux = 0;
 334         info->fix.xpanstep = 8;
 335         info->fix.ypanstep = 1;
 336         info->fix.ywrapstep = 0;
 337         info->fix.accel = FB_ACCEL_ATI_RADEON;
 338         info->fix.type_aux = 0;
 339         info->fix.mmio_start = 0;
 340         info->fix.mmio_len = 0;
 341         info->fix.line_length = fb->pitch;
 342         info->fix.smem_start = fb->bo->offset + dev->mode_config.fb_base;
 343         info->fix.smem_len = info->fix.line_length * fb->height;
 344         info->flags = FBINFO_DEFAULT;
 345         DRM_INFO("[radeon_ms] fb physical start : 0x%lX\n", info->fix.smem_start);
 346         DRM_INFO("[radeon_ms] fb physical size  : %d\n", info->fix.smem_len);
 347
 348         ret = drm_bo_kmap(fb->bo, 0, fb->bo->num_pages, &fb->kmap);
 349         if (ret) {
 350                 DRM_ERROR("error mapping fb: %d\n", ret);
 351         }
 352         info->screen_base = fb->kmap.virtual;
 353         info->screen_size = info->fix.smem_len; /* FIXME */
 354         info->pseudo_palette = fb->pseudo_palette;
 355         info->var.xres_virtual = fb->width;
 356         info->var.yres_virtual = fb->height;
 357         info->var.bits_per_pixel = fb->bits_per_pixel;
 358         info->var.xoffset = 0;
 359         info->var.yoffset = 0;
 360         info->var.activate = FB_ACTIVATE_NOW;
 361         info->var.height = -1;
 362         info->var.width = -1;
 363         info->var.vmode = FB_VMODE_NONINTERLACED;
 364
 365         info->var.xres = mode->hdisplay;
 366         info->var.right_margin = mode->hsync_start - mode->hdisplay;
 367         info->var.hsync_len = mode->hsync_end - mode->hsync_start;
 368         info->var.left_margin = mode->htotal - mode->hsync_end;
 369         info->var.yres = mode->vdisplay;
 370         info->var.lower_margin = mode->vsync_start - mode->vdisplay;
 371         info->var.vsync_len = mode->vsync_end - mode->vsync_start;
 372         info->var.upper_margin = mode->vtotal - mode->vsync_end;
 373         info->var.pixclock = 10000000 / mode->htotal * 1000 /
 374                 mode->vtotal * 100;
 375         /* avoid overflow */
 376         info->var.pixclock = info->var.pixclock * 1000 / mode->vrefresh;
 377
 378         info->pixmap.size = 64*1024;
 379         info->pixmap.buf_align = 8;
 380         info->pixmap.access_align = 32;
 381         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 382         info->pixmap.scan_align = 1;
 383
 384         DRM_DEBUG("fb depth is %d\n", fb->depth);
 385         DRM_DEBUG("   pitch is %d\n", fb->pitch);
 386         switch(fb->depth) {
 387         case 15:
 388                 info->var.red.offset = 10;
 389                 info->var.green.offset = 5;
 390                 info->var.blue.offset = 0;
 391                 info->var.red.length = info->var.green.length =
 392                         info->var.blue.length = 5;
 393                 info->var.transp.offset = 15;
 394                 info->var.transp.length = 1;
 395                 break;
 396         case 16:
 397                 info->var.red.offset = 11;
 398                 info->var.green.offset = 5;
 399                 info->var.blue.offset = 0;
 400                 info->var.red.length = 5;
 401                 info->var.green.length = 6;
 402                 info->var.blue.length = 5;
 403                 info->var.transp.offset = 0;
 404                 break;
 405         case 24:
 406                 info->var.red.offset = 16;
 407                 info->var.green.offset = 8;
 408                 info->var.blue.offset = 0;
 409                 info->var.red.length = info->var.green.length =
 410                         info->var.blue.length = 8;
 411                 info->var.transp.offset = 0;
 412                 info->var.transp.length = 0;
 413                 break;
 414         case 32:
 415                 info->var.red.offset = 16;
 416                 info->var.green.offset = 8;
 417                 info->var.blue.offset = 0;
 418                 info->var.red.length = info->var.green.length =
 419                         info->var.blue.length = 8;
 420                 info->var.transp.offset = 24;
 421                 info->var.transp.length = 8;
 422                 break;
 423         default:
 424                 DRM_ERROR("only support 15, 16, 24 or 32bits per pixel "
 425                           "got %d\n", fb->depth);
 426                 return -EINVAL;
 427                 break;
 428         }
 429
 430         if (register_framebuffer(info) < 0) {
 431                 return -EINVAL;
 432         }
 433
 434         DRM_INFO("[radeon_ms] fb%d: %s frame buffer device\n", info->node,
 435                  info->fix.id);
 436         return 0;
 437 }
 438 EXPORT_SYMBOL(radeonfb_probe);
 439
 440 int radeonfb_remove(struct drm_device *dev, struct drm_crtc *crtc)
 441 {
 442         struct drm_framebuffer *fb = crtc->fb;
 443         struct fb_info *info = fb->fbdev;
 444
 445         if (info) {
 446                 unregister_framebuffer(info);
 447                 drm_bo_kunmap(&fb->kmap);
 448                 drm_bo_usage_deref_unlocked(&fb->bo);
 449                 drm_framebuffer_destroy(fb);
 450                 framebuffer_release(info);
 451         }
 452         return 0;
 453 }
 454 EXPORT_SYMBOL(radeonfb_remove);
 455 MODULE_LICENSE("GPL");