drivers/gpu/drm/ast/ast_fb.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
   6  * "Software"), to deal in the Software without restriction, including
   7  * without limitation the rights to use, copy, modify, merge, publish,
   8  * distribute, sub license, and/or sell copies of the Software, and to
   9  * permit persons to whom the Software is furnished to do so, subject to
  10  * the following conditions:
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  13  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  14  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  15  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  16  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  17  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  18  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  19  *
  20  * The above copyright notice and this permission notice (including the
  21  * next paragraph) shall be included in all copies or substantial portions
  22  * of the Software.
  23  *
  24  */
  25 /*
  26  * Authors: Dave Airlie <airlied@redhat.com>
  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/sysrq.h>
  35 #include <linux/delay.h>
  36 #include <linux/fb.h>
  37 #include <linux/init.h>
  38
  39
  40 #include <drm/drmP.h>
  41 #include <drm/drm_crtc.h>
  42 #include <drm/drm_fb_helper.h>
  43 #include <drm/drm_crtc_helper.h>
  44 #include "ast_drv.h"
  45
  46 static void ast_dirty_update(struct ast_fbdev *afbdev,
  47                              int x, int y, int width, int height)
  48 {
  49         int i;
  50         struct drm_gem_object *obj;
  51         struct ast_bo *bo;
  52         int src_offset, dst_offset;
  53         int bpp = (afbdev->afb.base.bits_per_pixel + 7)/8;
  54         int ret;
  55         bool unmap = false;
  56
  57         obj = afbdev->afb.obj;
  58         bo = gem_to_ast_bo(obj);
  59
  60         ret = ast_bo_reserve(bo, true);
  61         if (ret) {
  62                 DRM_ERROR("failed to reserve fb bo\n");
  63                 return;
  64         }
  65
  66         if (!bo->kmap.virtual) {
  67                 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
  68                 if (ret) {
  69                         DRM_ERROR("failed to kmap fb updates\n");
  70                         ast_bo_unreserve(bo);
  71                         return;
  72                 }
  73                 unmap = true;
  74         }
  75         for (i = y; i < y + height; i++) {
  76                 /* assume equal stride for now */
  77                 src_offset = dst_offset = i * afbdev->afb.base.pitches[0] + (x * bpp);
  78                 memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, width * bpp);
  79
  80         }
  81         if (unmap)
  82                 ttm_bo_kunmap(&bo->kmap);
  83
  84         ast_bo_unreserve(bo);
  85 }
  86
  87 static void ast_fillrect(struct fb_info *info,
  88                          const struct fb_fillrect *rect)
  89 {
  90         struct ast_fbdev *afbdev = info->par;
  91         sys_fillrect(info, rect);
  92         ast_dirty_update(afbdev, rect->dx, rect->dy, rect->width,
  93                          rect->height);
  94 }
  95
  96 static void ast_copyarea(struct fb_info *info,
  97                          const struct fb_copyarea *area)
  98 {
  99         struct ast_fbdev *afbdev = info->par;
 100         sys_copyarea(info, area);
 101         ast_dirty_update(afbdev, area->dx, area->dy, area->width,
 102                          area->height);
 103 }
 104
 105 static void ast_imageblit(struct fb_info *info,
 106                           const struct fb_image *image)
 107 {
 108         struct ast_fbdev *afbdev = info->par;
 109         sys_imageblit(info, image);
 110         ast_dirty_update(afbdev, image->dx, image->dy, image->width,
 111                          image->height);
 112 }
 113
 114 static struct fb_ops astfb_ops = {
 115         .owner = THIS_MODULE,
 116         .fb_check_var = drm_fb_helper_check_var,
 117         .fb_set_par = drm_fb_helper_set_par,
 118         .fb_fillrect = ast_fillrect,
 119         .fb_copyarea = ast_copyarea,
 120         .fb_imageblit = ast_imageblit,
 121         .fb_pan_display = drm_fb_helper_pan_display,
 122         .fb_blank = drm_fb_helper_blank,
 123         .fb_setcmap = drm_fb_helper_setcmap,
 124         .fb_debug_enter = drm_fb_helper_debug_enter,
 125         .fb_debug_leave = drm_fb_helper_debug_leave,
 126 };
 127
 128 static int astfb_create_object(struct ast_fbdev *afbdev,
 129                                struct drm_mode_fb_cmd2 *mode_cmd,
 130                                struct drm_gem_object **gobj_p)
 131 {
 132         struct drm_device *dev = afbdev->helper.dev;
 133         u32 bpp, depth;
 134         u32 size;
 135         struct drm_gem_object *gobj;
 136
 137         int ret = 0;
 138         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 139
 140         size = mode_cmd->pitches[0] * mode_cmd->height;
 141         ret = ast_gem_create(dev, size, true, &gobj);
 142         if (ret)
 143                 return ret;
 144
 145         *gobj_p = gobj;
 146         return ret;
 147 }
 148
 149 static int astfb_create(struct ast_fbdev *afbdev,
 150                         struct drm_fb_helper_surface_size *sizes)
 151 {
 152         struct drm_device *dev = afbdev->helper.dev;
 153         struct drm_mode_fb_cmd2 mode_cmd;
 154         struct drm_framebuffer *fb;
 155         struct fb_info *info;
 156         int size, ret;
 157         struct device *device = &dev->pdev->dev;
 158         void *sysram;
 159         struct drm_gem_object *gobj = NULL;
 160         struct ast_bo *bo = NULL;
 161         mode_cmd.width = sizes->surface_width;
 162         mode_cmd.height = sizes->surface_height;
 163         mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7)/8);
 164
 165         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 166                                                           sizes->surface_depth);
 167
 168         size = mode_cmd.pitches[0] * mode_cmd.height;
 169
 170         ret = astfb_create_object(afbdev, &mode_cmd, &gobj);
 171         if (ret) {
 172                 DRM_ERROR("failed to create fbcon backing object %d\n", ret);
 173                 return ret;
 174         }
 175         bo = gem_to_ast_bo(gobj);
 176
 177         sysram = vmalloc(size);
 178         if (!sysram)
 179                 return -ENOMEM;
 180
 181         info = framebuffer_alloc(0, device);
 182         if (!info) {
 183                 ret = -ENOMEM;
 184                 goto out;
 185         }
 186         info->par = afbdev;
 187
 188         ret = ast_framebuffer_init(dev, &afbdev->afb, &mode_cmd, gobj);
 189         if (ret)
 190                 goto out;
 191
 192         afbdev->sysram = sysram;
 193         afbdev->size = size;
 194
 195         fb = &afbdev->afb.base;
 196         afbdev->helper.fb = fb;
 197         afbdev->helper.fbdev = info;
 198
 199         strcpy(info->fix.id, "astdrmfb");
 200
 201         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 202         info->fbops = &astfb_ops;
 203
 204         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 205         if (ret) {
 206                 ret = -ENOMEM;
 207                 goto out;
 208         }
 209
 210         info->apertures = alloc_apertures(1);
 211         if (!info->apertures) {
 212                 ret = -ENOMEM;
 213                 goto out;
 214         }
 215         info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0);
 216         info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
 217
 218         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 219         drm_fb_helper_fill_var(info, &afbdev->helper, sizes->fb_width, sizes->fb_height);
 220
 221         info->screen_base = sysram;
 222         info->screen_size = size;
 223
 224         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 225
 226         DRM_DEBUG_KMS("allocated %dx%d\n",
 227                       fb->width, fb->height);
 228
 229         return 0;
 230 out:
 231         return ret;
 232 }
 233
 234 static void ast_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 235                                u16 blue, int regno)
 236 {
 237         struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
 238         ast_crtc->lut_r[regno] = red >> 8;
 239         ast_crtc->lut_g[regno] = green >> 8;
 240         ast_crtc->lut_b[regno] = blue >> 8;
 241 }
 242
 243 static void ast_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 244                                u16 *blue, int regno)
 245 {
 246         struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
 247         *red = ast_crtc->lut_r[regno] << 8;
 248         *green = ast_crtc->lut_g[regno] << 8;
 249         *blue = ast_crtc->lut_b[regno] << 8;
 250 }
 251
 252 static int ast_find_or_create_single(struct drm_fb_helper *helper,
 253                                           struct drm_fb_helper_surface_size *sizes)
 254 {
 255         struct ast_fbdev *afbdev = (struct ast_fbdev *)helper;
 256         int new_fb = 0;
 257         int ret;
 258
 259         if (!helper->fb) {
 260                 ret = astfb_create(afbdev, sizes);
 261                 if (ret)
 262                         return ret;
 263                 new_fb = 1;
 264         }
 265         return new_fb;
 266 }
 267
 268 static struct drm_fb_helper_funcs ast_fb_helper_funcs = {
 269         .gamma_set = ast_fb_gamma_set,
 270         .gamma_get = ast_fb_gamma_get,
 271         .fb_probe = ast_find_or_create_single,
 272 };
 273
 274 static void ast_fbdev_destroy(struct drm_device *dev,
 275                               struct ast_fbdev *afbdev)
 276 {
 277         struct fb_info *info;
 278         struct ast_framebuffer *afb = &afbdev->afb;
 279         if (afbdev->helper.fbdev) {
 280                 info = afbdev->helper.fbdev;
 281                 unregister_framebuffer(info);
 282                 if (info->cmap.len)
 283                         fb_dealloc_cmap(&info->cmap);
 284                 framebuffer_release(info);
 285         }
 286
 287         if (afb->obj) {
 288                 drm_gem_object_unreference_unlocked(afb->obj);
 289                 afb->obj = NULL;
 290         }
 291         drm_fb_helper_fini(&afbdev->helper);
 292
 293         vfree(afbdev->sysram);
 294         drm_framebuffer_unregister_private(&afb->base);
 295         drm_framebuffer_cleanup(&afb->base);
 296 }
 297
 298 int ast_fbdev_init(struct drm_device *dev)
 299 {
 300         struct ast_private *ast = dev->dev_private;
 301         struct ast_fbdev *afbdev;
 302         int ret;
 303
 304         afbdev = kzalloc(sizeof(struct ast_fbdev), GFP_KERNEL);
 305         if (!afbdev)
 306                 return -ENOMEM;
 307
 308         ast->fbdev = afbdev;
 309         afbdev->helper.funcs = &ast_fb_helper_funcs;
 310         ret = drm_fb_helper_init(dev, &afbdev->helper,
 311                                  1, 1);
 312         if (ret) {
 313                 kfree(afbdev);
 314                 return ret;
 315         }
 316
 317         drm_fb_helper_single_add_all_connectors(&afbdev->helper);
 318
 319         /* disable all the possible outputs/crtcs before entering KMS mode */
 320         drm_helper_disable_unused_functions(dev);
 321
 322         drm_fb_helper_initial_config(&afbdev->helper, 32);
 323         return 0;
 324 }
 325
 326 void ast_fbdev_fini(struct drm_device *dev)
 327 {
 328         struct ast_private *ast = dev->dev_private;
 329
 330         if (!ast->fbdev)
 331                 return;
 332
 333         ast_fbdev_destroy(dev, ast->fbdev);
 334         kfree(ast->fbdev);
 335         ast->fbdev = NULL;
 336 }
 337
 338 void ast_fbdev_set_suspend(struct drm_device *dev, int state)
 339 {
 340         struct ast_private *ast = dev->dev_private;
 341
 342         if (!ast->fbdev)
 343                 return;
 344
 345         fb_set_suspend(ast->fbdev->helper.fbdev, state);
 346 }