1 /*
2 * Copyright (C) 2008 The Android Open Source Project
3 * Copyright (c) 2010-2012,2014 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 unsigned int offset = (unsigned int) (hnd->base -
93 m->framebuffer->base);
94 m->info.activate = FB_ACTIVATE_VBL;
95 m->info.yoffset = (int)(offset / m->finfo.line_length);
96 if (ioctl(m->framebuffer->fd, FBIOPUT_VSCREENINFO, &m->info) == -1) {
97 ALOGE("%s: FBIOPUT_VSCREENINFO for primary failed, str: %s",
98 __FUNCTION__, strerror(errno));
99 return -errno;
100 }
101 return 0;
102 }
103
fb_compositionComplete(struct framebuffer_device_t * dev)104 static int fb_compositionComplete(struct framebuffer_device_t* dev)
105 {
106 // TODO: Properly implement composition complete callback
107 if(!dev) {
108 return -1;
109 }
110 glFinish();
111
112 return 0;
113 }
114
mapFrameBufferLocked(struct private_module_t * module)115 int mapFrameBufferLocked(struct private_module_t* module)
116 {
117 // already initialized...
118 if (module->framebuffer) {
119 return 0;
120 }
121 char const * const device_template[] = {
122 "/dev/graphics/fb%u",
123 "/dev/fb%u",
124 0 };
125
126 int fd = -1;
127 int i=0;
128 char name[64];
129 char property[PROPERTY_VALUE_MAX];
130
131 while ((fd==-1) && device_template[i]) {
132 snprintf(name, 64, device_template[i], 0);
133 fd = open(name, O_RDWR, 0);
134 i++;
135 }
136 if (fd < 0)
137 return -errno;
138
139 memset(&module->commit, 0, sizeof(struct mdp_display_commit));
140
141 struct fb_fix_screeninfo finfo;
142 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1) {
143 close(fd);
144 return -errno;
145 }
146
147 struct fb_var_screeninfo info;
148 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1) {
149 close(fd);
150 return -errno;
151 }
152
153 info.reserved[0] = 0;
154 info.reserved[1] = 0;
155 info.reserved[2] = 0;
156 info.xoffset = 0;
157 info.yoffset = 0;
158 info.activate = FB_ACTIVATE_NOW;
159
160 /* Interpretation of offset for color fields: All offsets are from the
161 * right, inside a "pixel" value, which is exactly 'bits_per_pixel' wide
162 * (means: you can use the offset as right argument to <<). A pixel
163 * afterwards is a bit stream and is written to video memory as that
164 * unmodified. This implies big-endian byte order if bits_per_pixel is
165 * greater than 8.
166 */
167
168 if(info.bits_per_pixel == 32) {
169 /*
170 * Explicitly request RGBA_8888
171 */
172 info.bits_per_pixel = 32;
173 info.red.offset = 24;
174 info.red.length = 8;
175 info.green.offset = 16;
176 info.green.length = 8;
177 info.blue.offset = 8;
178 info.blue.length = 8;
179 info.transp.offset = 0;
180 info.transp.length = 8;
181
182 /* Note: the GL driver does not have a r=8 g=8 b=8 a=0 config, so if we
183 * do not use the MDP for composition (i.e. hw composition == 0), ask
184 * for RGBA instead of RGBX. */
185 if (property_get("debug.sf.hw", property, NULL) > 0 &&
186 atoi(property) == 0)
187 module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888;
188 else if(property_get("debug.composition.type", property, NULL) > 0 &&
189 (strncmp(property, "mdp", 3) == 0))
190 module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888;
191 else
192 module->fbFormat = HAL_PIXEL_FORMAT_RGBA_8888;
193 } else {
194 /*
195 * Explicitly request 5/6/5
196 */
197 info.bits_per_pixel = 16;
198 info.red.offset = 11;
199 info.red.length = 5;
200 info.green.offset = 5;
201 info.green.length = 6;
202 info.blue.offset = 0;
203 info.blue.length = 5;
204 info.transp.offset = 0;
205 info.transp.length = 0;
206 module->fbFormat = HAL_PIXEL_FORMAT_RGB_565;
207 }
208
209 //adreno needs 4k aligned offsets. Max hole size is 4096-1
210 unsigned int size = roundUpToPageSize(info.yres * info.xres *
211 (info.bits_per_pixel/8));
212
213 /*
214 * Request NUM_BUFFERS screens (at least 2 for page flipping)
215 */
216 int numberOfBuffers = (int)(finfo.smem_len/size);
217 ALOGV("num supported framebuffers in kernel = %d", numberOfBuffers);
218
219 if (property_get("debug.gr.numframebuffers", property, NULL) > 0) {
220 int num = atoi(property);
221 if ((num >= NUM_FRAMEBUFFERS_MIN) && (num <= NUM_FRAMEBUFFERS_MAX)) {
222 numberOfBuffers = num;
223 }
224 }
225 if (numberOfBuffers > NUM_FRAMEBUFFERS_MAX)
226 numberOfBuffers = NUM_FRAMEBUFFERS_MAX;
227
228 ALOGV("We support %d buffers", numberOfBuffers);
229
230 //consider the included hole by 4k alignment
231 uint32_t line_length = (info.xres * info.bits_per_pixel / 8);
232 info.yres_virtual = (uint32_t) ((size * numberOfBuffers) / line_length);
233
234 uint32_t flags = PAGE_FLIP;
235
236 if (info.yres_virtual < ((size * 2) / line_length) ) {
237 // we need at least 2 for page-flipping
238 info.yres_virtual = (int)(size / line_length);
239 flags &= ~PAGE_FLIP;
240 ALOGW("page flipping not supported (yres_virtual=%d, requested=%d)",
241 info.yres_virtual, info.yres*2);
242 }
243
244 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1) {
245 close(fd);
246 return -errno;
247 }
248
249 if (int(info.width) <= 0 || int(info.height) <= 0) {
250 // the driver doesn't return that information
251 // default to 160 dpi
252 info.width = (uint32_t)(((float)(info.xres) * 25.4f)/160.0f + 0.5f);
253 info.height = (uint32_t)(((float)(info.yres) * 25.4f)/160.0f + 0.5f);
254 }
255
256 float xdpi = ((float)(info.xres) * 25.4f) / (float)info.width;
257 float ydpi = ((float)(info.yres) * 25.4f) / (float)info.height;
258
259 #ifdef MSMFB_METADATA_GET
260 struct msmfb_metadata metadata;
261 memset(&metadata, 0 , sizeof(metadata));
262 metadata.op = metadata_op_frame_rate;
263 if (ioctl(fd, MSMFB_METADATA_GET, &metadata) == -1) {
264 ALOGE("Error retrieving panel frame rate");
265 close(fd);
266 return -errno;
267 }
268 float fps = (float)metadata.data.panel_frame_rate;
269 #else
270 //XXX: Remove reserved field usage on all baselines
271 //The reserved[3] field is used to store FPS by the driver.
272 float fps = info.reserved[3] & 0xFF;
273 #endif
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 close(fd);
307 return -errno;
308 }
309
310 if (finfo.smem_len <= 0) {
311 close(fd);
312 return -errno;
313 }
314
315 module->flags = flags;
316 module->info = info;
317 module->finfo = finfo;
318 module->xdpi = xdpi;
319 module->ydpi = ydpi;
320 module->fps = fps;
321 module->swapInterval = 1;
322
323 CALC_INIT();
324
325 /*
326 * map the framebuffer
327 */
328
329 module->numBuffers = info.yres_virtual / info.yres;
330 module->bufferMask = 0;
331 //adreno needs page aligned offsets. Align the fbsize to pagesize.
332 unsigned int fbSize = roundUpToPageSize(finfo.line_length * info.yres)*
333 module->numBuffers;
334 module->framebuffer = new private_handle_t(fd, fbSize,
335 private_handle_t::PRIV_FLAGS_USES_ION,
336 BUFFER_TYPE_UI,
337 module->fbFormat, info.xres, info.yres);
338 void* vaddr = mmap(0, fbSize, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
339 if (vaddr == MAP_FAILED) {
340 ALOGE("Error mapping the framebuffer (%s)", strerror(errno));
341 close(fd);
342 return -errno;
343 }
344 module->framebuffer->base = uint64_t(vaddr);
345 memset(vaddr, 0, fbSize);
346 //Enable vsync
347 int enable = 1;
348 ioctl(module->framebuffer->fd, MSMFB_OVERLAY_VSYNC_CTRL,
349 &enable);
350 return 0;
351 }
352
mapFrameBuffer(struct private_module_t * module)353 static int mapFrameBuffer(struct private_module_t* module)
354 {
355 int err = -1;
356 char property[PROPERTY_VALUE_MAX];
357 if((property_get("debug.gralloc.map_fb_memory", property, NULL) > 0) &&
358 (!strncmp(property, "1", PROPERTY_VALUE_MAX ) ||
359 (!strncasecmp(property,"true", PROPERTY_VALUE_MAX )))) {
360 pthread_mutex_lock(&module->lock);
361 err = mapFrameBufferLocked(module);
362 pthread_mutex_unlock(&module->lock);
363 }
364 return err;
365 }
366
367 /*****************************************************************************/
368
fb_close(struct hw_device_t * dev)369 static int fb_close(struct hw_device_t *dev)
370 {
371 fb_context_t* ctx = (fb_context_t*)dev;
372 if (ctx) {
373 //Hack until fbdev is removed. Framework could close this causing hwc a
374 //pain.
375 //free(ctx);
376 }
377 return 0;
378 }
379
fb_device_open(hw_module_t const * module,const char * name,hw_device_t ** device)380 int fb_device_open(hw_module_t const* module, const char* name,
381 hw_device_t** device)
382 {
383 int status = -EINVAL;
384 if (!strcmp(name, GRALLOC_HARDWARE_FB0)) {
385 alloc_device_t* gralloc_device;
386 status = gralloc_open(module, &gralloc_device);
387 if (status < 0)
388 return status;
389
390 /* initialize our state here */
391 fb_context_t *dev = (fb_context_t*)malloc(sizeof(*dev));
392 if(dev == NULL) {
393 gralloc_close(gralloc_device);
394 return status;
395 }
396 memset(dev, 0, sizeof(*dev));
397
398 /* initialize the procs */
399 dev->device.common.tag = HARDWARE_DEVICE_TAG;
400 dev->device.common.version = 0;
401 dev->device.common.module = const_cast<hw_module_t*>(module);
402 dev->device.common.close = fb_close;
403 dev->device.setSwapInterval = fb_setSwapInterval;
404 dev->device.post = fb_post;
405 dev->device.setUpdateRect = 0;
406 dev->device.compositionComplete = fb_compositionComplete;
407
408 private_module_t* m = (private_module_t*)module;
409 status = mapFrameBuffer(m);
410 if (status >= 0) {
411 int stride = m->finfo.line_length / (m->info.bits_per_pixel >> 3);
412 const_cast<uint32_t&>(dev->device.flags) = 0;
413 const_cast<uint32_t&>(dev->device.width) = m->info.xres;
414 const_cast<uint32_t&>(dev->device.height) = m->info.yres;
415 const_cast<int&>(dev->device.stride) = stride;
416 const_cast<int&>(dev->device.format) = m->fbFormat;
417 const_cast<float&>(dev->device.xdpi) = m->xdpi;
418 const_cast<float&>(dev->device.ydpi) = m->ydpi;
419 const_cast<float&>(dev->device.fps) = m->fps;
420 const_cast<int&>(dev->device.minSwapInterval) =
421 PRIV_MIN_SWAP_INTERVAL;
422 const_cast<int&>(dev->device.maxSwapInterval) =
423 PRIV_MAX_SWAP_INTERVAL;
424 const_cast<int&>(dev->device.numFramebuffers) = m->numBuffers;
425 dev->device.setUpdateRect = 0;
426
427 *device = &dev->device.common;
428 }
429
430 // Close the gralloc module
431 gralloc_close(gralloc_device);
432 }
433 return status;
434 }
435