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 //fd - which is returned on open
62 int fbFd;
63 };
64
fb_setSwapInterval(struct framebuffer_device_t * dev,int interval)65 static int fb_setSwapInterval(struct framebuffer_device_t* dev,
66 int interval)
67 {
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
76 private_module_t* m = reinterpret_cast<private_module_t*>(
77 dev->common.module);
78 if (interval < dev->minSwapInterval || interval > dev->maxSwapInterval)
79 return -EINVAL;
80
81 m->swapInterval = interval;
82 return 0;
83 }
84
fb_post(struct framebuffer_device_t * dev,buffer_handle_t buffer)85 static int fb_post(struct framebuffer_device_t* dev, buffer_handle_t buffer)
86 {
87 private_module_t* m =
88 reinterpret_cast<private_module_t*>(dev->common.module);
89 private_handle_t *hnd = static_cast<private_handle_t*>
90 (const_cast<native_handle_t*>(buffer));
91 fb_context_t *ctx = reinterpret_cast<fb_context_t*>(dev);
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(ctx->fbFd, 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(framebuffer_device_t * dev)115 int mapFrameBufferLocked(framebuffer_device_t *dev)
116 {
117 private_module_t* module =
118 reinterpret_cast<private_module_t*>(dev->common.module);
119 fb_context_t *ctx = reinterpret_cast<fb_context_t*>(dev);
120 // already initialized...
121 if (module->framebuffer) {
122 return 0;
123 }
124 char const * const device_template[] = {
125 "/dev/graphics/fb%u",
126 "/dev/fb%u",
127 0 };
128
129 int fd = -1;
130 int i=0;
131 char name[64];
132 char property[PROPERTY_VALUE_MAX];
133
134 while ((fd==-1) && device_template[i]) {
135 snprintf(name, 64, device_template[i], 0);
136 fd = open(name, O_RDWR, 0);
137 i++;
138 }
139 if (fd < 0)
140 return -errno;
141
142 struct fb_fix_screeninfo finfo;
143 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1) {
144 close(fd);
145 return -errno;
146 }
147
148 struct fb_var_screeninfo info;
149 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1) {
150 close(fd);
151 return -errno;
152 }
153
154 info.reserved[0] = 0;
155 info.reserved[1] = 0;
156 info.reserved[2] = 0;
157 info.xoffset = 0;
158 info.yoffset = 0;
159 info.activate = FB_ACTIVATE_NOW;
160
161 /* Interpretation of offset for color fields: All offsets are from the
162 * right, inside a "pixel" value, which is exactly 'bits_per_pixel' wide
163 * (means: you can use the offset as right argument to <<). A pixel
164 * afterwards is a bit stream and is written to video memory as that
165 * unmodified. This implies big-endian byte order if bits_per_pixel is
166 * greater than 8.
167 */
168
169 if(info.bits_per_pixel == 32) {
170 /*
171 * Explicitly request RGBA_8888
172 */
173 info.bits_per_pixel = 32;
174 info.red.offset = 24;
175 info.red.length = 8;
176 info.green.offset = 16;
177 info.green.length = 8;
178 info.blue.offset = 8;
179 info.blue.length = 8;
180 info.transp.offset = 0;
181 info.transp.length = 8;
182
183 /* Note: the GL driver does not have a r=8 g=8 b=8 a=0 config, so if we
184 * do not use the MDP for composition (i.e. hw composition == 0), ask
185 * for RGBA instead of RGBX. */
186 if (property_get("debug.sf.hw", property, NULL) > 0 &&
187 atoi(property) == 0)
188 module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888;
189 else if(property_get("debug.composition.type", property, NULL) > 0 &&
190 (strncmp(property, "mdp", 3) == 0))
191 module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888;
192 else
193 module->fbFormat = HAL_PIXEL_FORMAT_RGBA_8888;
194 } else {
195 /*
196 * Explicitly request 5/6/5
197 */
198 info.bits_per_pixel = 16;
199 info.red.offset = 11;
200 info.red.length = 5;
201 info.green.offset = 5;
202 info.green.length = 6;
203 info.blue.offset = 0;
204 info.blue.length = 5;
205 info.transp.offset = 0;
206 info.transp.length = 0;
207 module->fbFormat = HAL_PIXEL_FORMAT_RGB_565;
208 }
209
210 //adreno needs 4k aligned offsets. Max hole size is 4096-1
211 unsigned int size = roundUpToPageSize(info.yres * info.xres *
212 (info.bits_per_pixel/8));
213
214 /*
215 * Request NUM_BUFFERS screens (at least 2 for page flipping)
216 */
217 int numberOfBuffers = (int)(finfo.smem_len/size);
218 ALOGV("num supported framebuffers in kernel = %d", numberOfBuffers);
219
220 if (property_get("debug.gr.numframebuffers", property, NULL) > 0) {
221 int num = atoi(property);
222 if ((num >= NUM_FRAMEBUFFERS_MIN) && (num <= NUM_FRAMEBUFFERS_MAX)) {
223 numberOfBuffers = num;
224 }
225 }
226 if (numberOfBuffers > NUM_FRAMEBUFFERS_MAX)
227 numberOfBuffers = NUM_FRAMEBUFFERS_MAX;
228
229 ALOGV("We support %d buffers", numberOfBuffers);
230
231 //consider the included hole by 4k alignment
232 uint32_t line_length = (info.xres * info.bits_per_pixel / 8);
233 info.yres_virtual = (uint32_t) ((size * numberOfBuffers) / line_length);
234
235 uint32_t flags = PAGE_FLIP;
236
237 if (info.yres_virtual < ((size * 2) / line_length) ) {
238 // we need at least 2 for page-flipping
239 info.yres_virtual = (int)(size / line_length);
240 flags &= ~PAGE_FLIP;
241 ALOGW("page flipping not supported (yres_virtual=%d, requested=%d)",
242 info.yres_virtual, info.yres*2);
243 }
244
245 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1) {
246 close(fd);
247 return -errno;
248 }
249
250 if (int(info.width) <= 0 || int(info.height) <= 0) {
251 // the driver doesn't return that information
252 // default to 160 dpi
253 info.width = (uint32_t)(((float)(info.xres) * 25.4f)/160.0f + 0.5f);
254 info.height = (uint32_t)(((float)(info.yres) * 25.4f)/160.0f + 0.5f);
255 }
256
257 float xdpi = ((float)(info.xres) * 25.4f) / (float)info.width;
258 float ydpi = ((float)(info.yres) * 25.4f) / (float)info.height;
259
260 #ifdef MSMFB_METADATA_GET
261 struct msmfb_metadata metadata;
262 memset(&metadata, 0 , sizeof(metadata));
263 metadata.op = metadata_op_frame_rate;
264 if (ioctl(fd, MSMFB_METADATA_GET, &metadata) == -1) {
265 ALOGE("Error retrieving panel frame rate");
266 close(fd);
267 return -errno;
268 }
269 float fps = (float)metadata.data.panel_frame_rate;
270 #else
271 //XXX: Remove reserved field usage on all baselines
272 //The reserved[3] field is used to store FPS by the driver.
273 float fps = info.reserved[3] & 0xFF;
274 #endif
275 ALOGI("using (fd=%d)\n"
276 "id = %s\n"
277 "xres = %d px\n"
278 "yres = %d px\n"
279 "xres_virtual = %d px\n"
280 "yres_virtual = %d px\n"
281 "bpp = %d\n"
282 "r = %2u:%u\n"
283 "g = %2u:%u\n"
284 "b = %2u:%u\n",
285 fd,
286 finfo.id,
287 info.xres,
288 info.yres,
289 info.xres_virtual,
290 info.yres_virtual,
291 info.bits_per_pixel,
292 info.red.offset, info.red.length,
293 info.green.offset, info.green.length,
294 info.blue.offset, info.blue.length
295 );
296
297 ALOGI("width = %d mm (%f dpi)\n"
298 "height = %d mm (%f dpi)\n"
299 "refresh rate = %.2f Hz\n",
300 info.width, xdpi,
301 info.height, ydpi,
302 fps
303 );
304
305
306 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1) {
307 close(fd);
308 return -errno;
309 }
310
311 if (finfo.smem_len <= 0) {
312 close(fd);
313 return -errno;
314 }
315
316 module->flags = flags;
317 module->info = info;
318 module->finfo = finfo;
319 module->xdpi = xdpi;
320 module->ydpi = ydpi;
321 module->fps = fps;
322 module->swapInterval = 1;
323
324 CALC_INIT();
325
326 /*
327 * map the framebuffer
328 */
329
330 module->numBuffers = info.yres_virtual / info.yres;
331 module->bufferMask = 0;
332 //adreno needs page aligned offsets. Align the fbsize to pagesize.
333 unsigned int fbSize = roundUpToPageSize(finfo.line_length * info.yres)*
334 module->numBuffers;
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 close(fd);
339 return -errno;
340 }
341 //store the framebuffer fd in the ctx
342 ctx->fbFd = fd;
343 #ifdef MSMFB_METADATA_GET
344 memset(&metadata, 0 , sizeof(metadata));
345 metadata.op = metadata_op_get_ion_fd;
346 // get the ION fd for the framebuffer, as GPU needs ION fd
347 if (ioctl(fd, MSMFB_METADATA_GET, &metadata) == -1) {
348 ALOGE("Error getting ION fd (%s)", strerror(errno));
349 close(fd);
350 return -errno;
351 }
352 if(metadata.data.fbmem_ionfd < 0) {
353 ALOGE("Error: Ioctl returned invalid ION fd = %d",
354 metadata.data.fbmem_ionfd);
355 close(fd);
356 return -errno;
357 }
358 fd = metadata.data.fbmem_ionfd;
359 #endif
360 // Create framebuffer handle using the ION fd
361 module->framebuffer = new private_handle_t(fd, fbSize,
362 private_handle_t::PRIV_FLAGS_USES_ION,
363 BUFFER_TYPE_UI,
364 module->fbFormat, info.xres, info.yres);
365 module->framebuffer->base = uint64_t(vaddr);
366 memset(vaddr, 0, fbSize);
367 //Enable vsync
368 int enable = 1;
369 ioctl(ctx->fbFd, MSMFB_OVERLAY_VSYNC_CTRL, &enable);
370 return 0;
371 }
372
mapFrameBuffer(framebuffer_device_t * dev)373 static int mapFrameBuffer(framebuffer_device_t *dev)
374 {
375 int err = -1;
376 char property[PROPERTY_VALUE_MAX];
377 if((property_get("debug.gralloc.map_fb_memory", property, NULL) > 0) &&
378 (!strncmp(property, "1", PROPERTY_VALUE_MAX ) ||
379 (!strncasecmp(property,"true", PROPERTY_VALUE_MAX )))) {
380 private_module_t* module =
381 reinterpret_cast<private_module_t*>(dev->common.module);
382 pthread_mutex_lock(&module->lock);
383 err = mapFrameBufferLocked(dev);
384 pthread_mutex_unlock(&module->lock);
385 }
386 return err;
387 }
388
389 /*****************************************************************************/
390
fb_close(struct hw_device_t * dev)391 static int fb_close(struct hw_device_t *dev)
392 {
393 fb_context_t* ctx = (fb_context_t*)dev;
394 if (ctx) {
395 #ifdef MSMFB_METADATA_GET
396 if(ctx->fbFd >=0) {
397 close(ctx->fbFd);
398 }
399 #endif
400 //Hack until fbdev is removed. Framework could close this causing hwc a
401 //pain.
402 //free(ctx);
403 }
404 return 0;
405 }
406
fb_device_open(hw_module_t const * module,const char * name,hw_device_t ** device)407 int fb_device_open(hw_module_t const* module, const char* name,
408 hw_device_t** device)
409 {
410 int status = -EINVAL;
411 if (!strcmp(name, GRALLOC_HARDWARE_FB0)) {
412 alloc_device_t* gralloc_device;
413 status = gralloc_open(module, &gralloc_device);
414 if (status < 0)
415 return status;
416
417 /* initialize our state here */
418 fb_context_t *dev = (fb_context_t*)malloc(sizeof(*dev));
419 if(dev == NULL) {
420 gralloc_close(gralloc_device);
421 return status;
422 }
423 memset(dev, 0, sizeof(*dev));
424
425 /* initialize the procs */
426 dev->device.common.tag = HARDWARE_DEVICE_TAG;
427 dev->device.common.version = 0;
428 dev->device.common.module = const_cast<hw_module_t*>(module);
429 dev->device.common.close = fb_close;
430 dev->device.setSwapInterval = fb_setSwapInterval;
431 dev->device.post = fb_post;
432 dev->device.setUpdateRect = 0;
433 dev->device.compositionComplete = fb_compositionComplete;
434
435 status = mapFrameBuffer((framebuffer_device_t*)dev);
436 private_module_t* m = (private_module_t*)dev->device.common.module;
437 if (status >= 0) {
438 int stride = m->finfo.line_length / (m->info.bits_per_pixel >> 3);
439 const_cast<uint32_t&>(dev->device.flags) = 0;
440 const_cast<uint32_t&>(dev->device.width) = m->info.xres;
441 const_cast<uint32_t&>(dev->device.height) = m->info.yres;
442 const_cast<int&>(dev->device.stride) = stride;
443 const_cast<int&>(dev->device.format) = m->fbFormat;
444 const_cast<float&>(dev->device.xdpi) = m->xdpi;
445 const_cast<float&>(dev->device.ydpi) = m->ydpi;
446 const_cast<float&>(dev->device.fps) = m->fps;
447 const_cast<int&>(dev->device.minSwapInterval) =
448 PRIV_MIN_SWAP_INTERVAL;
449 const_cast<int&>(dev->device.maxSwapInterval) =
450 PRIV_MAX_SWAP_INTERVAL;
451 const_cast<int&>(dev->device.numFramebuffers) = m->numBuffers;
452 dev->device.setUpdateRect = 0;
453
454 *device = &dev->device.common;
455 }
456
457 // Close the gralloc module
458 gralloc_close(gralloc_device);
459 }
460 return status;
461 }
462