LXR linux/drivers/gpu/drm/ast/ast

   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/init.h>
  37
  38
  39#include <drm/drmP.h>
  40#include <drm/drm_crtc.h>
  41#include <drm/drm_fb_helper.h>
  42#include <drm/drm_crtc_helper.h>
  43#include "ast_drv.h"
  44
  45static void ast_dirty_update(struct ast_fbdev *afbdev,
  46                             int x, int y, int width, int height)
  47{
  48        int i;
  49        struct drm_gem_object *obj;
  50        struct ast_bo *bo;
  51        int src_offset, dst_offset;
  52        int bpp = afbdev->afb.base.format->cpp[0];
  53        int ret = -EBUSY;
  54        bool unmap = false;
  55        bool store_for_later = false;
  56        int x2, y2;
  57        unsigned long flags;
  58
  59        obj = afbdev->afb.obj;
  60        bo = gem_to_ast_bo(obj);
  61
  62        /*
  63         * try and reserve the BO, if we fail with busy
  64         * then the BO is being moved and we should
  65         * store up the damage until later.
  66         */
  67        if (drm_can_sleep())
  68                ret = ast_bo_reserve(bo, true);
  69        if (ret) {
  70                if (ret != -EBUSY)
  71                        return;
  72
  73                store_for_later = true;
  74        }
  75
  76        x2 = x + width - 1;
  77        y2 = y + height - 1;
  78        spin_lock_irqsave(&afbdev->dirty_lock, flags);
  79
  80        if (afbdev->y1 < y)
  81                y = afbdev->y1;
  82        if (afbdev->y2 > y2)
  83                y2 = afbdev->y2;
  84        if (afbdev->x1 < x)
  85                x = afbdev->x1;
  86        if (afbdev->x2 > x2)
  87                x2 = afbdev->x2;
  88
  89        if (store_for_later) {
  90                afbdev->x1 = x;
  91                afbdev->x2 = x2;
  92                afbdev->y1 = y;
  93                afbdev->y2 = y2;
  94                spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
  95                return;
  96        }
  97
  98        afbdev->x1 = afbdev->y1 = INT_MAX;
  99        afbdev->x2 = afbdev->y2 = 0;
 100        spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
 101
 102        if (!bo->kmap.virtual) {
 103                ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
 104                if (ret) {
 105                        DRM_ERROR("failed to kmap fb updates\n");
 106                        ast_bo_unreserve(bo);
 107                        return;
 108                }
 109                unmap = true;
 110        }
 111        for (i = y; i <= y2; i++) {
 112                /* assume equal stride for now */
 113                src_offset = dst_offset = i * afbdev->afb.base.pitches[0] + (x * bpp);
 114                memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, (x2 - x + 1) * bpp);
 115
 116        }
 117        if (unmap)
 118                ttm_bo_kunmap(&bo->kmap);
 119
 120        ast_bo_unreserve(bo);
 121}
 122
 123static void ast_fillrect(struct fb_info *info,
 124                         const struct fb_fillrect *rect)
 125{
 126        struct ast_fbdev *afbdev = info->par;
 127        drm_fb_helper_sys_fillrect(info, rect);
 128        ast_dirty_update(afbdev, rect->dx, rect->dy, rect->width,
 129                         rect->height);
 130}
 131
 132static void ast_copyarea(struct fb_info *info,
 133                         const struct fb_copyarea *area)
 134{
 135        struct ast_fbdev *afbdev = info->par;
 136        drm_fb_helper_sys_copyarea(info, area);
 137        ast_dirty_update(afbdev, area->dx, area->dy, area->width,
 138                         area->height);
 139}
 140
 141static void ast_imageblit(struct fb_info *info,
 142                          const struct fb_image *image)
 143{
 144        struct ast_fbdev *afbdev = info->par;
 145        drm_fb_helper_sys_imageblit(info, image);
 146        ast_dirty_update(afbdev, image->dx, image->dy, image->width,
 147                         image->height);
 148}
 149
 150static struct fb_ops astfb_ops = {
 151        .owner = THIS_MODULE,
 152        .fb_check_var = drm_fb_helper_check_var,
 153        .fb_set_par = drm_fb_helper_set_par,
 154        .fb_fillrect = ast_fillrect,
 155        .fb_copyarea = ast_copyarea,
 156        .fb_imageblit = ast_imageblit,
 157        .fb_pan_display = drm_fb_helper_pan_display,
 158        .fb_blank = drm_fb_helper_blank,
 159        .fb_setcmap = drm_fb_helper_setcmap,
 160        .fb_debug_enter = drm_fb_helper_debug_enter,
 161        .fb_debug_leave = drm_fb_helper_debug_leave,
 162};
 163
 164static int astfb_create_object(struct ast_fbdev *afbdev,
 165                               const struct drm_mode_fb_cmd2 *mode_cmd,
 166                               struct drm_gem_object **gobj_p)
 167{
 168        struct drm_device *dev = afbdev->helper.dev;
 169        u32 size;
 170        struct drm_gem_object *gobj;
 171        int ret = 0;
 172
 173        size = mode_cmd->pitches[0] * mode_cmd->height;
 174        ret = ast_gem_create(dev, size, true, &gobj);
 175        if (ret)
 176                return ret;
 177
 178        *gobj_p = gobj;
 179        return ret;
 180}
 181
 182static int astfb_create(struct drm_fb_helper *helper,
 183                        struct drm_fb_helper_surface_size *sizes)
 184{
 185        struct ast_fbdev *afbdev =
 186                container_of(helper, struct ast_fbdev, helper);
 187        struct drm_device *dev = afbdev->helper.dev;
 188        struct drm_mode_fb_cmd2 mode_cmd;
 189        struct drm_framebuffer *fb;
 190        struct fb_info *info;
 191        int size, ret;
 192        void *sysram;
 193        struct drm_gem_object *gobj = NULL;
 194        struct ast_bo *bo = NULL;
 195        mode_cmd.width = sizes->surface_width;
 196        mode_cmd.height = sizes->surface_height;
 197        mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7)/8);
 198
 199        mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 200                                                          sizes->surface_depth);
 201
 202        size = mode_cmd.pitches[0] * mode_cmd.height;
 203
 204        ret = astfb_create_object(afbdev, &mode_cmd, &gobj);
 205        if (ret) {
 206                DRM_ERROR("failed to create fbcon backing object %d\n", ret);
 207                return ret;
 208        }
 209        bo = gem_to_ast_bo(gobj);
 210
 211        sysram = vmalloc(size);
 212        if (!sysram)
 213                return -ENOMEM;
 214
 215        info = drm_fb_helper_alloc_fbi(helper);
 216        if (IS_ERR(info)) {
 217                ret = PTR_ERR(info);
 218                goto err_free_vram;
 219        }
 220        info->par = afbdev;
 221
 222        ret = ast_framebuffer_init(dev, &afbdev->afb, &mode_cmd, gobj);
 223        if (ret)
 224                goto err_release_fbi;
 225
 226        afbdev->sysram = sysram;
 227        afbdev->size = size;
 228
 229        fb = &afbdev->afb.base;
 230        afbdev->helper.fb = fb;
 231
 232        strcpy(info->fix.id, "astdrmfb");
 233
 234        info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 235        info->fbops = &astfb_ops;
 236
 237        info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0);
 238        info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
 239
 240        drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
 241        drm_fb_helper_fill_var(info, &afbdev->helper, sizes->fb_width, sizes->fb_height);
 242
 243        info->screen_base = sysram;
 244        info->screen_size = size;
 245
 246        info->pixmap.flags = FB_PIXMAP_SYSTEM;
 247
 248        DRM_DEBUG_KMS("allocated %dx%d\n",
 249                      fb->width, fb->height);
 250
 251        return 0;
 252
 253err_release_fbi:
 254        drm_fb_helper_release_fbi(helper);
 255err_free_vram:
 256        vfree(sysram);
 257        return ret;
 258}
 259
 260static void ast_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 261                               u16 blue, int regno)
 262{
 263        struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
 264        ast_crtc->lut_r[regno] = red >> 8;
 265        ast_crtc->lut_g[regno] = green >> 8;
 266        ast_crtc->lut_b[regno] = blue >> 8;
 267}
 268
 269static void ast_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 270                               u16 *blue, int regno)
 271{
 272        struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
 273        *red = ast_crtc->lut_r[regno] << 8;
 274        *green = ast_crtc->lut_g[regno] << 8;
 275        *blue = ast_crtc->lut_b[regno] << 8;
 276}
 277
 278static const struct drm_fb_helper_funcs ast_fb_helper_funcs = {
 279        .gamma_set = ast_fb_gamma_set,
 280        .gamma_get = ast_fb_gamma_get,
 281        .fb_probe = astfb_create,
 282};
 283
 284static void ast_fbdev_destroy(struct drm_device *dev,
 285                              struct ast_fbdev *afbdev)
 286{
 287        struct ast_framebuffer *afb = &afbdev->afb;
 288
 289        drm_fb_helper_unregister_fbi(&afbdev->helper);
 290        drm_fb_helper_release_fbi(&afbdev->helper);
 291
 292        if (afb->obj) {
 293                drm_gem_object_unreference_unlocked(afb->obj);
 294                afb->obj = NULL;
 295        }
 296        drm_fb_helper_fini(&afbdev->helper);
 297
 298        vfree(afbdev->sysram);
 299        drm_framebuffer_unregister_private(&afb->base);
 300        drm_framebuffer_cleanup(&afb->base);
 301}
 302
 303int ast_fbdev_init(struct drm_device *dev)
 304{
 305        struct ast_private *ast = dev->dev_private;
 306        struct ast_fbdev *afbdev;
 307        int ret;
 308
 309        afbdev = kzalloc(sizeof(struct ast_fbdev), GFP_KERNEL);
 310        if (!afbdev)
 311                return -ENOMEM;
 312
 313        ast->fbdev = afbdev;
 314        spin_lock_init(&afbdev->dirty_lock);
 315
 316        drm_fb_helper_prepare(dev, &afbdev->helper, &ast_fb_helper_funcs);
 317
 318        ret = drm_fb_helper_init(dev, &afbdev->helper, 1);
 319        if (ret)
 320                goto free;
 321
 322        ret = drm_fb_helper_single_add_all_connectors(&afbdev->helper);
 323        if (ret)
 324                goto fini;
 325
 326        /* disable all the possible outputs/crtcs before entering KMS mode */
 327        drm_helper_disable_unused_functions(dev);
 328
 329        ret = drm_fb_helper_initial_config(&afbdev->helper, 32);
 330        if (ret)
 331                goto fini;
 332
 333        return 0;
 334
 335fini:
 336        drm_fb_helper_fini(&afbdev->helper);
 337free:
 338        kfree(afbdev);
 339        return ret;
 340}
 341
 342void ast_fbdev_fini(struct drm_device *dev)
 343{
 344        struct ast_private *ast = dev->dev_private;
 345
 346        if (!ast->fbdev)
 347                return;
 348
 349        ast_fbdev_destroy(dev, ast->fbdev);
 350        kfree(ast->fbdev);
 351        ast->fbdev = NULL;
 352}
 353
 354void ast_fbdev_set_suspend(struct drm_device *dev, int state)
 355{
 356        struct ast_private *ast = dev->dev_private;
 357
 358        if (!ast->fbdev)
 359                return;
 360
 361        drm_fb_helper_set_suspend(&ast->fbdev->helper, state);
 362}
 363
 364void ast_fbdev_set_base(struct ast_private *ast, unsigned long gpu_addr)
 365{
 366        ast->fbdev->helper.fbdev->fix.smem_start =
 367                ast->fbdev->helper.fbdev->apertures->ranges[0].base + gpu_addr;
 368        ast->fbdev->helper.fbdev->fix.smem_len = ast->vram_size - gpu_addr;
 369}
 370