1 /*
2 * Copyright (C) 2008 The Android Open Source Project
3 * Copyright (c) 2010-2012 Code Aurora Forum. All rights reserved.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 #include <sys/mman.h>
19
20 #include <cutils/log.h>
21 #include <cutils/properties.h>
22 #include <dlfcn.h>
23
24 #include <hardware/hardware.h>
25
26 #include <fcntl.h>
27 #include <errno.h>
28 #include <sys/ioctl.h>
29 #include <string.h>
30 #include <stdlib.h>
31 #include <pthread.h>
32 #include <cutils/atomic.h>
33
34 #include <linux/fb.h>
35 #include <linux/msm_mdp.h>
36
37 #include <GLES/gl.h>
38
39 #include "gralloc_priv.h"
40 #include "fb_priv.h"
41 #include "gr.h"
42 #include <genlock.h>
43 #include <cutils/properties.h>
44 #include <profiler.h>
45
46 #define EVEN_OUT(x) if (x & 0x0001) {x--;}
47 /** min of int a, b */
min(int a,int b)48 static inline int min(int a, int b) {
49 return (a<b) ? a : b;
50 }
51 /** max of int a, b */
max(int a,int b)52 static inline int max(int a, int b) {
53 return (a>b) ? a : b;
54 }
55
56 enum {
57 PAGE_FLIP = 0x00000001,
58 LOCKED = 0x00000002
59 };
60
61 struct fb_context_t {
62 framebuffer_device_t device;
63 };
64
65
fb_setSwapInterval(struct framebuffer_device_t * dev,int interval)66 static int fb_setSwapInterval(struct framebuffer_device_t* dev,
67 int interval)
68 {
69 //XXX: Get the value here and implement along with
70 //single vsync in HWC
71 char pval[PROPERTY_VALUE_MAX];
72 property_get("debug.egl.swapinterval", pval, "-1");
73 int property_interval = atoi(pval);
74 if (property_interval >= 0)
75 interval = property_interval;
76
77 fb_context_t* ctx = (fb_context_t*)dev;
78 private_module_t* m = reinterpret_cast<private_module_t*>(
79 dev->common.module);
80 if (interval < dev->minSwapInterval || interval > dev->maxSwapInterval)
81 return -EINVAL;
82
83 m->swapInterval = interval;
84 return 0;
85 }
86
fb_setUpdateRect(struct framebuffer_device_t * dev,int l,int t,int w,int h)87 static int fb_setUpdateRect(struct framebuffer_device_t* dev,
88 int l, int t, int w, int h)
89 {
90 if (((w|h) <= 0) || ((l|t)<0))
91 return -EINVAL;
92 fb_context_t* ctx = (fb_context_t*)dev;
93 private_module_t* m = reinterpret_cast<private_module_t*>(
94 dev->common.module);
95 m->info.reserved[0] = 0x54445055; // "UPDT";
96 m->info.reserved[1] = (uint16_t)l | ((uint32_t)t << 16);
97 m->info.reserved[2] = (uint16_t)(l+w) | ((uint32_t)(t+h) << 16);
98 return 0;
99 }
100
fb_post(struct framebuffer_device_t * dev,buffer_handle_t buffer)101 static int fb_post(struct framebuffer_device_t* dev, buffer_handle_t buffer)
102 {
103
104 fb_context_t* ctx = (fb_context_t*) dev;
105
106 private_handle_t *hnd = static_cast<private_handle_t*>
107 (const_cast<native_handle_t*>(buffer));
108 private_module_t* m =
109 reinterpret_cast<private_module_t*>(dev->common.module);
110
111 if (hnd) {
112 m->info.activate = FB_ACTIVATE_VBL | FB_ACTIVATE_FORCE;
113 m->info.yoffset = hnd->offset / m->finfo.line_length;
114 m->commit.var = m->info;
115 m->commit.flags |= MDP_DISPLAY_COMMIT_OVERLAY;
116 if (ioctl(m->framebuffer->fd, MSMFB_DISPLAY_COMMIT, &m->commit) == -1) {
117 ALOGE("%s: MSMFB_DISPLAY_COMMIT ioctl failed, err: %s", __FUNCTION__,
118 strerror(errno));
119 return -errno;
120 }
121 }
122 return 0;
123 }
124
fb_compositionComplete(struct framebuffer_device_t * dev)125 static int fb_compositionComplete(struct framebuffer_device_t* dev)
126 {
127 // TODO: Properly implement composition complete callback
128 glFinish();
129
130 return 0;
131 }
132
mapFrameBufferLocked(struct private_module_t * module)133 int mapFrameBufferLocked(struct private_module_t* module)
134 {
135 // already initialized...
136 if (module->framebuffer) {
137 return 0;
138 }
139 char const * const device_template[] = {
140 "/dev/graphics/fb%u",
141 "/dev/fb%u",
142 0 };
143
144 int fd = -1;
145 int i=0;
146 char name[64];
147 char property[PROPERTY_VALUE_MAX];
148
149 while ((fd==-1) && device_template[i]) {
150 snprintf(name, 64, device_template[i], 0);
151 fd = open(name, O_RDWR, 0);
152 i++;
153 }
154 if (fd < 0)
155 return -errno;
156
157 memset(&module->fence, 0, sizeof(struct mdp_buf_fence));
158 memset(&module->commit, 0, sizeof(struct mdp_display_commit));
159
160 struct fb_fix_screeninfo finfo;
161 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1)
162 return -errno;
163
164 struct fb_var_screeninfo info;
165 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1)
166 return -errno;
167
168 info.reserved[0] = 0;
169 info.reserved[1] = 0;
170 info.reserved[2] = 0;
171 info.xoffset = 0;
172 info.yoffset = 0;
173 info.activate = FB_ACTIVATE_NOW;
174
175 /* Interpretation of offset for color fields: All offsets are from the
176 * right, inside a "pixel" value, which is exactly 'bits_per_pixel' wide
177 * (means: you can use the offset as right argument to <<). A pixel
178 * afterwards is a bit stream and is written to video memory as that
179 * unmodified. This implies big-endian byte order if bits_per_pixel is
180 * greater than 8.
181 */
182
183 if(info.bits_per_pixel == 32) {
184 /*
185 * Explicitly request RGBA_8888
186 */
187 info.bits_per_pixel = 32;
188 info.red.offset = 24;
189 info.red.length = 8;
190 info.green.offset = 16;
191 info.green.length = 8;
192 info.blue.offset = 8;
193 info.blue.length = 8;
194 info.transp.offset = 0;
195 info.transp.length = 8;
196
197 /* Note: the GL driver does not have a r=8 g=8 b=8 a=0 config, so if we
198 * do not use the MDP for composition (i.e. hw composition == 0), ask
199 * for RGBA instead of RGBX. */
200 if (property_get("debug.sf.hw", property, NULL) > 0 &&
201 atoi(property) == 0)
202 module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888;
203 else if(property_get("debug.composition.type", property, NULL) > 0 &&
204 (strncmp(property, "mdp", 3) == 0))
205 module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888;
206 else
207 module->fbFormat = HAL_PIXEL_FORMAT_RGBA_8888;
208 } else {
209 /*
210 * Explicitly request 5/6/5
211 */
212 info.bits_per_pixel = 16;
213 info.red.offset = 11;
214 info.red.length = 5;
215 info.green.offset = 5;
216 info.green.length = 6;
217 info.blue.offset = 0;
218 info.blue.length = 5;
219 info.transp.offset = 0;
220 info.transp.length = 0;
221 module->fbFormat = HAL_PIXEL_FORMAT_RGB_565;
222 }
223
224 //adreno needs 4k aligned offsets. Max hole size is 4096-1
225 int size = roundUpToPageSize(info.yres * info.xres *
226 (info.bits_per_pixel/8));
227
228 /*
229 * Request NUM_BUFFERS screens (at least 2 for page flipping)
230 */
231 int numberOfBuffers = (int)(finfo.smem_len/size);
232 ALOGV("num supported framebuffers in kernel = %d", numberOfBuffers);
233
234 if (property_get("debug.gr.numframebuffers", property, NULL) > 0) {
235 int num = atoi(property);
236 if ((num >= NUM_FRAMEBUFFERS_MIN) && (num <= NUM_FRAMEBUFFERS_MAX)) {
237 numberOfBuffers = num;
238 }
239 }
240 if (numberOfBuffers > NUM_FRAMEBUFFERS_MAX)
241 numberOfBuffers = NUM_FRAMEBUFFERS_MAX;
242
243 ALOGV("We support %d buffers", numberOfBuffers);
244
245 //consider the included hole by 4k alignment
246 uint32_t line_length = (info.xres * info.bits_per_pixel / 8);
247 info.yres_virtual = (size * numberOfBuffers) / line_length;
248
249 uint32_t flags = PAGE_FLIP;
250
251 if (info.yres_virtual < ((size * 2) / line_length) ) {
252 // we need at least 2 for page-flipping
253 info.yres_virtual = size / line_length;
254 flags &= ~PAGE_FLIP;
255 ALOGW("page flipping not supported (yres_virtual=%d, requested=%d)",
256 info.yres_virtual, info.yres*2);
257 }
258
259 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1)
260 return -errno;
261
262 if (int(info.width) <= 0 || int(info.height) <= 0) {
263 // the driver doesn't return that information
264 // default to 160 dpi
265 info.width = ((info.xres * 25.4f)/160.0f + 0.5f);
266 info.height = ((info.yres * 25.4f)/160.0f + 0.5f);
267 }
268
269 float xdpi = (info.xres * 25.4f) / info.width;
270 float ydpi = (info.yres * 25.4f) / info.height;
271 //The reserved[3] field is used to store FPS by the driver.
272 float fps = info.reserved[3] & 0xFF;
273
274 ALOGI("using (fd=%d)\n"
275 "id = %s\n"
276 "xres = %d px\n"
277 "yres = %d px\n"
278 "xres_virtual = %d px\n"
279 "yres_virtual = %d px\n"
280 "bpp = %d\n"
281 "r = %2u:%u\n"
282 "g = %2u:%u\n"
283 "b = %2u:%u\n",
284 fd,
285 finfo.id,
286 info.xres,
287 info.yres,
288 info.xres_virtual,
289 info.yres_virtual,
290 info.bits_per_pixel,
291 info.red.offset, info.red.length,
292 info.green.offset, info.green.length,
293 info.blue.offset, info.blue.length
294 );
295
296 ALOGI("width = %d mm (%f dpi)\n"
297 "height = %d mm (%f dpi)\n"
298 "refresh rate = %.2f Hz\n",
299 info.width, xdpi,
300 info.height, ydpi,
301 fps
302 );
303
304
305 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1)
306 return -errno;
307
308 if (finfo.smem_len <= 0)
309 return -errno;
310
311 module->flags = flags;
312 module->info = info;
313 module->finfo = finfo;
314 module->xdpi = xdpi;
315 module->ydpi = ydpi;
316 module->fps = fps;
317 module->swapInterval = 1;
318
319 CALC_INIT();
320
321 /*
322 * map the framebuffer
323 */
324
325 int err;
326 module->numBuffers = 2;
327 module->bufferMask = 0;
328 //adreno needs page aligned offsets. Align the fbsize to pagesize.
329 size_t fbSize = roundUpToPageSize(finfo.line_length * info.yres)*
330 module->numBuffers;
331 module->framebuffer = new private_handle_t(fd, fbSize,
332 private_handle_t::PRIV_FLAGS_USES_PMEM,
333 BUFFER_TYPE_UI,
334 module->fbFormat, info.xres, info.yres);
335 void* vaddr = mmap(0, fbSize, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
336 if (vaddr == MAP_FAILED) {
337 ALOGE("Error mapping the framebuffer (%s)", strerror(errno));
338 return -errno;
339 }
340 module->framebuffer->base = intptr_t(vaddr);
341 memset(vaddr, 0, fbSize);
342 module->currentOffset = 0;
343 module->fbPostDone = false;
344 pthread_mutex_init(&(module->fbPostLock), NULL);
345 pthread_cond_init(&(module->fbPostCond), NULL);
346 module->fbPanDone = false;
347 pthread_mutex_init(&(module->fbPanLock), NULL);
348 pthread_cond_init(&(module->fbPanCond), NULL);
349 return 0;
350 }
351
mapFrameBuffer(struct private_module_t * module)352 static int mapFrameBuffer(struct private_module_t* module)
353 {
354 pthread_mutex_lock(&module->lock);
355 int err = mapFrameBufferLocked(module);
356 pthread_mutex_unlock(&module->lock);
357 return err;
358 }
359
360 /*****************************************************************************/
361
fb_close(struct hw_device_t * dev)362 static int fb_close(struct hw_device_t *dev)
363 {
364 fb_context_t* ctx = (fb_context_t*)dev;
365 if (ctx) {
366 //Hack until fbdev is removed. Framework could close this causing hwc a
367 //pain.
368 //free(ctx);
369 }
370 return 0;
371 }
372
fb_device_open(hw_module_t const * module,const char * name,hw_device_t ** device)373 int fb_device_open(hw_module_t const* module, const char* name,
374 hw_device_t** device)
375 {
376 int status = -EINVAL;
377 if (!strcmp(name, GRALLOC_HARDWARE_FB0)) {
378 alloc_device_t* gralloc_device;
379 status = gralloc_open(module, &gralloc_device);
380 if (status < 0)
381 return status;
382
383 /* initialize our state here */
384 fb_context_t *dev = (fb_context_t*)malloc(sizeof(*dev));
385 memset(dev, 0, sizeof(*dev));
386
387 /* initialize the procs */
388 dev->device.common.tag = HARDWARE_DEVICE_TAG;
389 dev->device.common.version = 0;
390 dev->device.common.module = const_cast<hw_module_t*>(module);
391 dev->device.common.close = fb_close;
392 dev->device.setSwapInterval = fb_setSwapInterval;
393 dev->device.post = fb_post;
394 dev->device.setUpdateRect = 0;
395 dev->device.compositionComplete = fb_compositionComplete;
396
397 private_module_t* m = (private_module_t*)module;
398 status = mapFrameBuffer(m);
399 if (status >= 0) {
400 int stride = m->finfo.line_length / (m->info.bits_per_pixel >> 3);
401 const_cast<uint32_t&>(dev->device.flags) = 0;
402 const_cast<uint32_t&>(dev->device.width) = m->info.xres;
403 const_cast<uint32_t&>(dev->device.height) = m->info.yres;
404 const_cast<int&>(dev->device.stride) = stride;
405 const_cast<int&>(dev->device.format) = m->fbFormat;
406 const_cast<float&>(dev->device.xdpi) = m->xdpi;
407 const_cast<float&>(dev->device.ydpi) = m->ydpi;
408 const_cast<float&>(dev->device.fps) = m->fps;
409 const_cast<int&>(dev->device.minSwapInterval) =
410 PRIV_MIN_SWAP_INTERVAL;
411 const_cast<int&>(dev->device.maxSwapInterval) =
412 PRIV_MAX_SWAP_INTERVAL;
413 const_cast<int&>(dev->device.numFramebuffers) = m->numBuffers;
414 if (m->finfo.reserved[0] == 0x5444 &&
415 m->finfo.reserved[1] == 0x5055) {
416 dev->device.setUpdateRect = fb_setUpdateRect;
417 ALOGD("UPDATE_ON_DEMAND supported");
418 }
419
420 *device = &dev->device.common;
421 }
422
423 // Close the gralloc module
424 gralloc_close(gralloc_device);
425 }
426 return status;
427 }
428