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