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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 "drmP.h"
41#include "drm.h"
42#include "drm_crtc.h"
43#include "drm_fb_helper.h"
44#include "ast_drv.h"
45
46static 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
87static 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
96static 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
105static 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
114static 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
128static 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
149static 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;
230out:
231 return ret;
232}
233
234static 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
243static 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
252static 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
268static 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
274static 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_cleanup(&afb->base);
295}
296
297int ast_fbdev_init(struct drm_device *dev)
298{
299 struct ast_private *ast = dev->dev_private;
300 struct ast_fbdev *afbdev;
301 int ret;
302
303 afbdev = kzalloc(sizeof(struct ast_fbdev), GFP_KERNEL);
304 if (!afbdev)
305 return -ENOMEM;
306
307 ast->fbdev = afbdev;
308 afbdev->helper.funcs = &ast_fb_helper_funcs;
309 ret = drm_fb_helper_init(dev, &afbdev->helper,
310 1, 1);
311 if (ret) {
312 kfree(afbdev);
313 return ret;
314 }
315
316 drm_fb_helper_single_add_all_connectors(&afbdev->helper);
317 drm_fb_helper_initial_config(&afbdev->helper, 32);
318 return 0;
319}
320
321void ast_fbdev_fini(struct drm_device *dev)
322{
323 struct ast_private *ast = dev->dev_private;
324
325 if (!ast->fbdev)
326 return;
327
328 ast_fbdev_destroy(dev, ast->fbdev);
329 kfree(ast->fbdev);
330 ast->fbdev = NULL;
331}
332
333void ast_fbdev_set_suspend(struct drm_device *dev, int state)
334{
335 struct ast_private *ast = dev->dev_private;
336
337 if (!ast->fbdev)
338 return;
339
340 fb_set_suspend(ast->fbdev->helper.fbdev, state);
341}