1 /*
2 * Copyright (C) 2008 The Android Open Source Project
3 * Copyright (c) 2010-2014 The Linux Foundation. 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 <cutils/properties.h>
43 #include <profiler.h>
44
45 #define EVEN_OUT(x) if (x & 0x0001) {x--;}
46 /** min of int a, b */
min(int a,int b)47 static inline int min(int a, int b) {
48 return (a<b) ? a : b;
49 }
50 /** max of int a, b */
max(int a,int b)51 static inline int max(int a, int b) {
52 return (a>b) ? a : b;
53 }
54
55 enum {
56 PAGE_FLIP = 0x00000001,
57 };
58
59 struct fb_context_t {
60 framebuffer_device_t device;
61 };
62
63
fb_setSwapInterval(struct framebuffer_device_t * dev,int interval)64 static int fb_setSwapInterval(struct framebuffer_device_t* dev,
65 int interval)
66 {
67 #ifdef DEBUG_SWAPINTERVAL
68 //XXX: Get the value here and implement along with
69 //single vsync in HWC
70 char pval[PROPERTY_VALUE_MAX];
71 property_get("debug.egl.swapinterval", pval, "-1");
72 int property_interval = atoi(pval);
73 if (property_interval >= 0)
74 interval = property_interval;
75 #endif
76
77 private_module_t* m = reinterpret_cast<private_module_t*>(
78 dev->common.module);
79 if (interval < dev->minSwapInterval || interval > dev->maxSwapInterval)
80 return -EINVAL;
81
82 m->swapInterval = interval;
83 return 0;
84 }
85
fb_post(struct framebuffer_device_t * dev,buffer_handle_t buffer)86 static int fb_post(struct framebuffer_device_t* dev, buffer_handle_t buffer)
87 {
88 private_module_t* m =
89 reinterpret_cast<private_module_t*>(dev->common.module);
90 private_handle_t *hnd = static_cast<private_handle_t*>
91 (const_cast<native_handle_t*>(buffer));
92 const size_t offset = hnd->base - m->framebuffer->base;
93 m->info.activate = FB_ACTIVATE_VBL;
94 m->info.yoffset = (int)(offset / m->finfo.line_length);
95 if (ioctl(m->framebuffer->fd, FBIOPUT_VSCREENINFO, &m->info) == -1) {
96 ALOGE("%s: FBIOPUT_VSCREENINFO for primary failed, str: %s",
97 __FUNCTION__, strerror(errno));
98 return -errno;
99 }
100 return 0;
101 }
102
fb_compositionComplete(struct framebuffer_device_t * dev)103 static int fb_compositionComplete(struct framebuffer_device_t* dev)
104 {
105 // TODO: Properly implement composition complete callback
106 if(!dev) {
107 return -1;
108 }
109 glFinish();
110
111 return 0;
112 }
113
mapFrameBufferLocked(struct private_module_t * module)114 int mapFrameBufferLocked(struct private_module_t* module)
115 {
116 // already initialized...
117 if (module->framebuffer) {
118 return 0;
119 }
120 char const * const device_template[] = {
121 "/dev/graphics/fb%u",
122 "/dev/fb%u",
123 0 };
124
125 int fd = -1;
126 int i=0;
127 char name[64];
128 char property[PROPERTY_VALUE_MAX];
129
130 while ((fd==-1) && device_template[i]) {
131 snprintf(name, 64, device_template[i], 0);
132 fd = open(name, O_RDWR, 0);
133 i++;
134 }
135 if (fd < 0)
136 return -errno;
137
138 memset(&module->commit, 0, sizeof(struct mdp_display_commit));
139
140 struct fb_fix_screeninfo finfo;
141 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1) {
142 close(fd);
143 return -errno;
144 }
145
146 struct fb_var_screeninfo info;
147 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1) {
148 close(fd);
149 return -errno;
150 }
151
152 info.reserved[0] = 0;
153 info.reserved[1] = 0;
154 info.reserved[2] = 0;
155 info.xoffset = 0;
156 info.yoffset = 0;
157 info.activate = FB_ACTIVATE_NOW;
158
159 /* Interpretation of offset for color fields: All offsets are from the
160 * right, inside a "pixel" value, which is exactly 'bits_per_pixel' wide
161 * (means: you can use the offset as right argument to <<). A pixel
162 * afterwards is a bit stream and is written to video memory as that
163 * unmodified. This implies big-endian byte order if bits_per_pixel is
164 * greater than 8.
165 */
166
167 if(info.bits_per_pixel == 32) {
168 /*
169 * Explicitly request RGBA_8888
170 */
171 info.bits_per_pixel = 32;
172 info.red.offset = 24;
173 info.red.length = 8;
174 info.green.offset = 16;
175 info.green.length = 8;
176 info.blue.offset = 8;
177 info.blue.length = 8;
178 info.transp.offset = 0;
179 info.transp.length = 8;
180
181 /* Note: the GL driver does not have a r=8 g=8 b=8 a=0 config, so if we
182 * do not use the MDP for composition (i.e. hw composition == 0), ask
183 * for RGBA instead of RGBX. */
184 if (property_get("debug.sf.hw", property, NULL) > 0 &&
185 atoi(property) == 0)
186 module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888;
187 else if(property_get("debug.composition.type", property, NULL) > 0 &&
188 (strncmp(property, "mdp", 3) == 0))
189 module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888;
190 else
191 module->fbFormat = HAL_PIXEL_FORMAT_RGBA_8888;
192 } else {
193 /*
194 * Explicitly request 5/6/5
195 */
196 info.bits_per_pixel = 16;
197 info.red.offset = 11;
198 info.red.length = 5;
199 info.green.offset = 5;
200 info.green.length = 6;
201 info.blue.offset = 0;
202 info.blue.length = 5;
203 info.transp.offset = 0;
204 info.transp.length = 0;
205 module->fbFormat = HAL_PIXEL_FORMAT_RGB_565;
206 }
207
208 //adreno needs 4k aligned offsets. Max hole size is 4096-1
209 size_t size = roundUpToPageSize(info.yres * info.xres *
210 (info.bits_per_pixel/8));
211
212 /*
213 * Request NUM_BUFFERS screens (at least 2 for page flipping)
214 */
215 int numberOfBuffers = (int)(finfo.smem_len/size);
216 ALOGV("num supported framebuffers in kernel = %d", numberOfBuffers);
217
218 if (property_get("debug.gr.numframebuffers", property, NULL) > 0) {
219 int num = atoi(property);
220 if ((num >= NUM_FRAMEBUFFERS_MIN) && (num <= NUM_FRAMEBUFFERS_MAX)) {
221 numberOfBuffers = num;
222 }
223 }
224 if (numberOfBuffers > NUM_FRAMEBUFFERS_MAX)
225 numberOfBuffers = NUM_FRAMEBUFFERS_MAX;
226
227 ALOGV("We support %d buffers", numberOfBuffers);
228
229 //consider the included hole by 4k alignment
230 uint32_t line_length = (info.xres * info.bits_per_pixel / 8);
231 info.yres_virtual = (uint32_t) ((size * numberOfBuffers) / line_length);
232
233 uint32_t flags = PAGE_FLIP;
234
235 if (info.yres_virtual < ((size * 2) / line_length) ) {
236 // we need at least 2 for page-flipping
237 info.yres_virtual = (int)(size / line_length);
238 flags &= ~PAGE_FLIP;
239 ALOGW("page flipping not supported (yres_virtual=%d, requested=%d)",
240 info.yres_virtual, info.yres*2);
241 }
242
243 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1) {
244 close(fd);
245 return -errno;
246 }
247
248 if (int(info.width) <= 0 || int(info.height) <= 0) {
249 // the driver doesn't return that information
250 // default to 160 dpi
251 info.width = (uint32_t)(((float)(info.xres) * 25.4f)/160.0f + 0.5f);
252 info.height = (uint32_t)(((float)(info.yres) * 25.4f)/160.0f + 0.5f);
253 }
254
255 float xdpi = ((float)(info.xres) * 25.4f) / (float)info.width;
256 float ydpi = ((float)(info.yres) * 25.4f) / (float)info.height;
257
258 #ifdef MSMFB_METADATA_GET
259 struct msmfb_metadata metadata;
260 memset(&metadata, 0 , sizeof(metadata));
261 metadata.op = metadata_op_frame_rate;
262 if (ioctl(fd, MSMFB_METADATA_GET, &metadata) == -1) {
263 ALOGE("Error retrieving panel frame rate");
264 close(fd);
265 return -errno;
266 }
267 float fps = (float)metadata.data.panel_frame_rate;
268 #else
269 //XXX: Remove reserved field usage on all baselines
270 //The reserved[3] field is used to store FPS by the driver.
271 float fps = info.reserved[3] & 0xFF;
272 #endif
273 ALOGI("using (fd=%d)\n"
274 "id = %s\n"
275 "xres = %d px\n"
276 "yres = %d px\n"
277 "xres_virtual = %d px\n"
278 "yres_virtual = %d px\n"
279 "bpp = %d\n"
280 "r = %2u:%u\n"
281 "g = %2u:%u\n"
282 "b = %2u:%u\n",
283 fd,
284 finfo.id,
285 info.xres,
286 info.yres,
287 info.xres_virtual,
288 info.yres_virtual,
289 info.bits_per_pixel,
290 info.red.offset, info.red.length,
291 info.green.offset, info.green.length,
292 info.blue.offset, info.blue.length
293 );
294
295 ALOGI("width = %d mm (%f dpi)\n"
296 "height = %d mm (%f dpi)\n"
297 "refresh rate = %.2f Hz\n",
298 info.width, xdpi,
299 info.height, ydpi,
300 fps
301 );
302
303
304 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1) {
305 close(fd);
306 return -errno;
307 }
308
309 if (finfo.smem_len <= 0) {
310 close(fd);
311 return -errno;
312 }
313
314 module->flags = flags;
315 module->info = info;
316 module->finfo = finfo;
317 module->xdpi = xdpi;
318 module->ydpi = ydpi;
319 module->fps = fps;
320 module->swapInterval = 1;
321
322 CALC_INIT();
323
324 /*
325 * map the framebuffer
326 */
327
328 module->numBuffers = info.yres_virtual / info.yres;
329 module->bufferMask = 0;
330 //adreno needs page aligned offsets. Align the fbsize to pagesize.
331 size_t fbSize = roundUpToPageSize(finfo.line_length * info.yres)*
332 module->numBuffers;
333 module->framebuffer = new private_handle_t(fd, fbSize,
334 private_handle_t::PRIV_FLAGS_USES_ION,
335 BUFFER_TYPE_UI,
336 module->fbFormat, info.xres, info.yres);
337 void* vaddr = mmap(0, fbSize, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
338 if (vaddr == MAP_FAILED) {
339 ALOGE("Error mapping the framebuffer (%s)", strerror(errno));
340 close(fd);
341 return -errno;
342 }
343 module->framebuffer->base = uintptr_t(vaddr);
344 memset(vaddr, 0, fbSize);
345 //Enable vsync
346 int enable = 1;
347 ioctl(module->framebuffer->fd, MSMFB_OVERLAY_VSYNC_CTRL,
348 &enable);
349 return 0;
350 }
351
mapFrameBuffer(struct private_module_t * module)352 static int mapFrameBuffer(struct private_module_t* module)
353 {
354 int err = -1;
355 char property[PROPERTY_VALUE_MAX];
356 if((property_get("debug.gralloc.map_fb_memory", property, NULL) > 0) &&
357 (!strncmp(property, "1", PROPERTY_VALUE_MAX ) ||
358 (!strncasecmp(property,"true", PROPERTY_VALUE_MAX )))) {
359 pthread_mutex_lock(&module->lock);
360 err = mapFrameBufferLocked(module);
361 pthread_mutex_unlock(&module->lock);
362 }
363 return err;
364 }
365
366 /*****************************************************************************/
367
fb_close(struct hw_device_t * dev)368 static int fb_close(struct hw_device_t *dev)
369 {
370 fb_context_t* ctx = (fb_context_t*)dev;
371 if (ctx) {
372 //Hack until fbdev is removed. Framework could close this causing hwc a
373 //pain.
374 //free(ctx);
375 }
376 return 0;
377 }
378
fb_device_open(hw_module_t const * module,const char * name,hw_device_t ** device)379 int fb_device_open(hw_module_t const* module, const char* name,
380 hw_device_t** device)
381 {
382 int status = -EINVAL;
383 if (!strcmp(name, GRALLOC_HARDWARE_FB0)) {
384 alloc_device_t* gralloc_device;
385 status = gralloc_open(module, &gralloc_device);
386 if (status < 0)
387 return status;
388
389 /* initialize our state here */
390 fb_context_t *dev = (fb_context_t*)malloc(sizeof(*dev));
391 if(dev == NULL) {
392 gralloc_close(gralloc_device);
393 return status;
394 }
395 memset(dev, 0, sizeof(*dev));
396
397 /* initialize the procs */
398 dev->device.common.tag = HARDWARE_DEVICE_TAG;
399 dev->device.common.version = 0;
400 dev->device.common.module = const_cast<hw_module_t*>(module);
401 dev->device.common.close = fb_close;
402 dev->device.setSwapInterval = fb_setSwapInterval;
403 dev->device.post = fb_post;
404 dev->device.setUpdateRect = 0;
405 dev->device.compositionComplete = fb_compositionComplete;
406
407 private_module_t* m = (private_module_t*)module;
408 status = mapFrameBuffer(m);
409 if (status >= 0) {
410 int stride = m->finfo.line_length / (m->info.bits_per_pixel >> 3);
411 const_cast<uint32_t&>(dev->device.flags) = 0;
412 const_cast<uint32_t&>(dev->device.width) = m->info.xres;
413 const_cast<uint32_t&>(dev->device.height) = m->info.yres;
414 const_cast<int&>(dev->device.stride) = stride;
415 const_cast<int&>(dev->device.format) = m->fbFormat;
416 const_cast<float&>(dev->device.xdpi) = m->xdpi;
417 const_cast<float&>(dev->device.ydpi) = m->ydpi;
418 const_cast<float&>(dev->device.fps) = m->fps;
419 const_cast<int&>(dev->device.minSwapInterval) =
420 PRIV_MIN_SWAP_INTERVAL;
421 const_cast<int&>(dev->device.maxSwapInterval) =
422 PRIV_MAX_SWAP_INTERVAL;
423 const_cast<int&>(dev->device.numFramebuffers) = m->numBuffers;
424 dev->device.setUpdateRect = 0;
425
426 *device = &dev->device.common;
427 }
428
429 // Close the gralloc module
430 gralloc_close(gralloc_device);
431 }
432 return status;
433 }
434