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 drm_fb_helper *helper,
 150                         struct drm_fb_helper_surface_size *sizes)
 151 {
 152         struct ast_fbdev *afbdev = (struct ast_fbdev *)helper;
 153         struct drm_device *dev = afbdev->helper.dev;
 154         struct drm_mode_fb_cmd2 mode_cmd;
 155         struct drm_framebuffer *fb;
 156         struct fb_info *info;
 157         int size, ret;
 158         struct device *device = &dev->pdev->dev;
 159         void *sysram;
 160         struct drm_gem_object *gobj = NULL;
 161         struct ast_bo *bo = NULL;
 162         mode_cmd.width = sizes->surface_width;
 163         mode_cmd.height = sizes->surface_height;
 164         mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7)/8);
 165
 166         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 167                                                           sizes->surface_depth);
 168
 169         size = mode_cmd.pitches[0] * mode_cmd.height;
 170
 171         ret = astfb_create_object(afbdev, &mode_cmd, &gobj);
 172         if (ret) {
 173                 DRM_ERROR("failed to create fbcon backing object %d\n", ret);
 174                 return ret;
 175         }
 176         bo = gem_to_ast_bo(gobj);
 177
 178         sysram = vmalloc(size);
 179         if (!sysram)
 180                 return -ENOMEM;
 181
 182         info = framebuffer_alloc(0, device);
 183         if (!info) {
 184                 ret = -ENOMEM;
 185                 goto out;
 186         }
 187         info->par = afbdev;
 188
 189         ret = ast_framebuffer_init(dev, &afbdev->afb, &mode_cmd, gobj);
 190         if (ret)
 191                 goto out;
 192
 193         afbdev->sysram = sysram;
 194         afbdev->size = size;
 195
 196         fb = &afbdev->afb.base;
 197         afbdev->helper.fb = fb;
 198         afbdev->helper.fbdev = info;
 199
 200         strcpy(info->fix.id, "astdrmfb");
 201
 202         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 203         info->fbops = &astfb_ops;
 204
 205         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 206         if (ret) {
 207                 ret = -ENOMEM;
 208                 goto out;
 209         }
 210
 211         info->apertures = alloc_apertures(1);
 212         if (!info->apertures) {
 213                 ret = -ENOMEM;
 214                 goto out;
 215         }
 216         info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0);
 217         info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
 218
 219         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 220         drm_fb_helper_fill_var(info, &afbdev->helper, sizes->fb_width, sizes->fb_height);
 221
 222         info->screen_base = sysram;
 223         info->screen_size = size;
 224
 225         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 226
 227         DRM_DEBUG_KMS("allocated %dx%d\n",
 228                       fb->width, fb->height);
 229
 230         return 0;
 231 out:
 232         return ret;
 233 }
 234
 235 static void ast_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 236                                u16 blue, int regno)
 237 {
 238         struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
 239         ast_crtc->lut_r[regno] = red >> 8;
 240         ast_crtc->lut_g[regno] = green >> 8;
 241         ast_crtc->lut_b[regno] = blue >> 8;
 242 }
 243
 244 static void ast_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 245                                u16 *blue, int regno)
 246 {
 247         struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
 248         *red = ast_crtc->lut_r[regno] << 8;
 249         *green = ast_crtc->lut_g[regno] << 8;
 250         *blue = ast_crtc->lut_b[regno] << 8;
 251 }
 252
 253 static struct drm_fb_helper_funcs ast_fb_helper_funcs = {
 254         .gamma_set = ast_fb_gamma_set,
 255         .gamma_get = ast_fb_gamma_get,
 256         .fb_probe = astfb_create,
 257 };
 258
 259 static void ast_fbdev_destroy(struct drm_device *dev,
 260                               struct ast_fbdev *afbdev)
 261 {
 262         struct fb_info *info;
 263         struct ast_framebuffer *afb = &afbdev->afb;
 264         if (afbdev->helper.fbdev) {
 265                 info = afbdev->helper.fbdev;
 266                 unregister_framebuffer(info);
 267                 if (info->cmap.len)
 268                         fb_dealloc_cmap(&info->cmap);
 269                 framebuffer_release(info);
 270         }
 271
 272         if (afb->obj) {
 273                 drm_gem_object_unreference_unlocked(afb->obj);
 274                 afb->obj = NULL;
 275         }
 276         drm_fb_helper_fini(&afbdev->helper);
 277
 278         vfree(afbdev->sysram);
 279         drm_framebuffer_unregister_private(&afb->base);
 280         drm_framebuffer_cleanup(&afb->base);
 281 }
 282
 283 int ast_fbdev_init(struct drm_device *dev)
 284 {
 285         struct ast_private *ast = dev->dev_private;
 286         struct ast_fbdev *afbdev;
 287         int ret;
 288
 289         afbdev = kzalloc(sizeof(struct ast_fbdev), GFP_KERNEL);
 290         if (!afbdev)
 291                 return -ENOMEM;
 292
 293         ast->fbdev = afbdev;
 294         afbdev->helper.funcs = &ast_fb_helper_funcs;
 295         ret = drm_fb_helper_init(dev, &afbdev->helper,
 296                                  1, 1);
 297         if (ret) {
 298                 kfree(afbdev);
 299                 return ret;
 300         }
 301
 302         drm_fb_helper_single_add_all_connectors(&afbdev->helper);
 303
 304         /* disable all the possible outputs/crtcs before entering KMS mode */
 305         drm_helper_disable_unused_functions(dev);
 306
 307         drm_fb_helper_initial_config(&afbdev->helper, 32);
 308         return 0;
 309 }
 310
 311 void ast_fbdev_fini(struct drm_device *dev)
 312 {
 313         struct ast_private *ast = dev->dev_private;
 314
 315         if (!ast->fbdev)
 316                 return;
 317
 318         ast_fbdev_destroy(dev, ast->fbdev);
 319         kfree(ast->fbdev);
 320         ast->fbdev = NULL;
 321 }
 322
 323 void ast_fbdev_set_suspend(struct drm_device *dev, int state)
 324 {
 325         struct ast_private *ast = dev->dev_private;
 326
 327         if (!ast->fbdev)
 328                 return;
 329
 330         fb_set_suspend(ast->fbdev->helper.fbdev, state);
 331 }