1 /*
2 * Copyright (C) 2008 The Android Open Source Project
3 * Copyright (c) 2010-2013 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 = 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 glFinish();
107
108 return 0;
109 }
110
mapFrameBufferLocked(struct private_module_t * module)111 int mapFrameBufferLocked(struct private_module_t* module)
112 {
113 // already initialized...
114 if (module->framebuffer) {
115 return 0;
116 }
117 char const * const device_template[] = {
118 "/dev/graphics/fb%u",
119 "/dev/fb%u",
120 0 };
121
122 int fd = -1;
123 int i=0;
124 char name[64];
125 char property[PROPERTY_VALUE_MAX];
126
127 while ((fd==-1) && device_template[i]) {
128 snprintf(name, 64, device_template[i], 0);
129 fd = open(name, O_RDWR, 0);
130 i++;
131 }
132 if (fd < 0)
133 return -errno;
134
135 memset(&module->commit, 0, sizeof(struct mdp_display_commit));
136
137 struct fb_fix_screeninfo finfo;
138 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1)
139 return -errno;
140
141 struct fb_var_screeninfo info;
142 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1)
143 return -errno;
144
145 info.reserved[0] = 0;
146 info.reserved[1] = 0;
147 info.reserved[2] = 0;
148 info.xoffset = 0;
149 info.yoffset = 0;
150 info.activate = FB_ACTIVATE_NOW;
151
152 /* Interpretation of offset for color fields: All offsets are from the
153 * right, inside a "pixel" value, which is exactly 'bits_per_pixel' wide
154 * (means: you can use the offset as right argument to <<). A pixel
155 * afterwards is a bit stream and is written to video memory as that
156 * unmodified. This implies big-endian byte order if bits_per_pixel is
157 * greater than 8.
158 */
159
160 if(info.bits_per_pixel == 32) {
161 /*
162 * Explicitly request RGBA_8888
163 */
164 info.bits_per_pixel = 32;
165 info.red.offset = 24;
166 info.red.length = 8;
167 info.green.offset = 16;
168 info.green.length = 8;
169 info.blue.offset = 8;
170 info.blue.length = 8;
171 info.transp.offset = 0;
172 info.transp.length = 8;
173
174 /* Note: the GL driver does not have a r=8 g=8 b=8 a=0 config, so if we
175 * do not use the MDP for composition (i.e. hw composition == 0), ask
176 * for RGBA instead of RGBX. */
177 if (property_get("debug.sf.hw", property, NULL) > 0 &&
178 atoi(property) == 0)
179 module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888;
180 else if(property_get("debug.composition.type", property, NULL) > 0 &&
181 (strncmp(property, "mdp", 3) == 0))
182 module->fbFormat = HAL_PIXEL_FORMAT_RGBX_8888;
183 else
184 module->fbFormat = HAL_PIXEL_FORMAT_RGBA_8888;
185 } else {
186 /*
187 * Explicitly request 5/6/5
188 */
189 info.bits_per_pixel = 16;
190 info.red.offset = 11;
191 info.red.length = 5;
192 info.green.offset = 5;
193 info.green.length = 6;
194 info.blue.offset = 0;
195 info.blue.length = 5;
196 info.transp.offset = 0;
197 info.transp.length = 0;
198 module->fbFormat = HAL_PIXEL_FORMAT_RGB_565;
199 }
200
201 //adreno needs 4k aligned offsets. Max hole size is 4096-1
202 int size = roundUpToPageSize(info.yres * info.xres *
203 (info.bits_per_pixel/8));
204
205 /*
206 * Request NUM_BUFFERS screens (at least 2 for page flipping)
207 */
208 int numberOfBuffers = (int)(finfo.smem_len/size);
209 ALOGV("num supported framebuffers in kernel = %d", numberOfBuffers);
210
211 if (property_get("debug.gr.numframebuffers", property, NULL) > 0) {
212 int num = atoi(property);
213 if ((num >= NUM_FRAMEBUFFERS_MIN) && (num <= NUM_FRAMEBUFFERS_MAX)) {
214 numberOfBuffers = num;
215 }
216 }
217 if (numberOfBuffers > NUM_FRAMEBUFFERS_MAX)
218 numberOfBuffers = NUM_FRAMEBUFFERS_MAX;
219
220 ALOGV("We support %d buffers", numberOfBuffers);
221
222 //consider the included hole by 4k alignment
223 uint32_t line_length = (info.xres * info.bits_per_pixel / 8);
224 info.yres_virtual = (size * numberOfBuffers) / line_length;
225
226 uint32_t flags = PAGE_FLIP;
227
228 if (info.yres_virtual < ((size * 2) / line_length) ) {
229 // we need at least 2 for page-flipping
230 info.yres_virtual = size / line_length;
231 flags &= ~PAGE_FLIP;
232 ALOGW("page flipping not supported (yres_virtual=%d, requested=%d)",
233 info.yres_virtual, info.yres*2);
234 }
235
236 if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1)
237 return -errno;
238
239 if (int(info.width) <= 0 || int(info.height) <= 0) {
240 // the driver doesn't return that information
241 // default to 160 dpi
242 info.width = ((info.xres * 25.4f)/160.0f + 0.5f);
243 info.height = ((info.yres * 25.4f)/160.0f + 0.5f);
244 }
245
246 float xdpi = (info.xres * 25.4f) / info.width;
247 float ydpi = (info.yres * 25.4f) / info.height;
248 #ifdef MSMFB_METADATA_GET
249 struct msmfb_metadata metadata;
250 memset(&metadata, 0 , sizeof(metadata));
251 metadata.op = metadata_op_frame_rate;
252 if (ioctl(fd, MSMFB_METADATA_GET, &metadata) == -1) {
253 ALOGE("Error retrieving panel frame rate");
254 return -errno;
255 }
256 float fps = metadata.data.panel_frame_rate;
257 #else
258 //XXX: Remove reserved field usage on all baselines
259 //The reserved[3] field is used to store FPS by the driver.
260 float fps = info.reserved[3] & 0xFF;
261 #endif
262 ALOGI("using (fd=%d)\n"
263 "id = %s\n"
264 "xres = %d px\n"
265 "yres = %d px\n"
266 "xres_virtual = %d px\n"
267 "yres_virtual = %d px\n"
268 "bpp = %d\n"
269 "r = %2u:%u\n"
270 "g = %2u:%u\n"
271 "b = %2u:%u\n",
272 fd,
273 finfo.id,
274 info.xres,
275 info.yres,
276 info.xres_virtual,
277 info.yres_virtual,
278 info.bits_per_pixel,
279 info.red.offset, info.red.length,
280 info.green.offset, info.green.length,
281 info.blue.offset, info.blue.length
282 );
283
284 ALOGI("width = %d mm (%f dpi)\n"
285 "height = %d mm (%f dpi)\n"
286 "refresh rate = %.2f Hz\n",
287 info.width, xdpi,
288 info.height, ydpi,
289 fps
290 );
291
292
293 if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1)
294 return -errno;
295
296 if (finfo.smem_len <= 0)
297 return -errno;
298
299 module->flags = flags;
300 module->info = info;
301 module->finfo = finfo;
302 module->xdpi = xdpi;
303 module->ydpi = ydpi;
304 module->fps = fps;
305 module->swapInterval = 1;
306
307 CALC_INIT();
308
309 /*
310 * map the framebuffer
311 */
312
313 module->numBuffers = info.yres_virtual / info.yres;
314 module->bufferMask = 0;
315 //adreno needs page aligned offsets. Align the fbsize to pagesize.
316 size_t fbSize = roundUpToPageSize(finfo.line_length * info.yres)*
317 module->numBuffers;
318 module->framebuffer = new private_handle_t(fd, fbSize,
319 private_handle_t::PRIV_FLAGS_USES_ION,
320 BUFFER_TYPE_UI,
321 module->fbFormat, info.xres, info.yres);
322 void* vaddr = mmap(0, fbSize, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
323 if (vaddr == MAP_FAILED) {
324 ALOGE("Error mapping the framebuffer (%s)", strerror(errno));
325 return -errno;
326 }
327 module->framebuffer->base = intptr_t(vaddr);
328 memset(vaddr, 0, fbSize);
329 module->currentOffset = 0;
330 //Enable vsync
331 int enable = 1;
332 ioctl(module->framebuffer->fd, MSMFB_OVERLAY_VSYNC_CTRL,
333 &enable);
334 return 0;
335 }
336
mapFrameBuffer(struct private_module_t * module)337 static int mapFrameBuffer(struct private_module_t* module)
338 {
339 pthread_mutex_lock(&module->lock);
340 int err = mapFrameBufferLocked(module);
341 pthread_mutex_unlock(&module->lock);
342 return err;
343 }
344
345 /*****************************************************************************/
346
fb_close(struct hw_device_t * dev)347 static int fb_close(struct hw_device_t *dev)
348 {
349 fb_context_t* ctx = (fb_context_t*)dev;
350 if (ctx) {
351 free(ctx);
352 }
353 return 0;
354 }
355
fb_device_open(hw_module_t const * module,const char * name,hw_device_t ** device)356 int fb_device_open(hw_module_t const* module, const char* name,
357 hw_device_t** device)
358 {
359 int status = -EINVAL;
360 if (!strcmp(name, GRALLOC_HARDWARE_FB0)) {
361 alloc_device_t* gralloc_device;
362 status = gralloc_open(module, &gralloc_device);
363 if (status < 0)
364 return status;
365
366 /* initialize our state here */
367 fb_context_t *dev = (fb_context_t*)malloc(sizeof(*dev));
368 memset(dev, 0, sizeof(*dev));
369
370 /* initialize the procs */
371 dev->device.common.tag = HARDWARE_DEVICE_TAG;
372 dev->device.common.version = 0;
373 dev->device.common.module = const_cast<hw_module_t*>(module);
374 dev->device.common.close = fb_close;
375 dev->device.setSwapInterval = fb_setSwapInterval;
376 dev->device.post = fb_post;
377 dev->device.setUpdateRect = 0;
378 dev->device.compositionComplete = fb_compositionComplete;
379
380 private_module_t* m = (private_module_t*)module;
381 status = mapFrameBuffer(m);
382 if (status >= 0) {
383 int stride = m->finfo.line_length / (m->info.bits_per_pixel >> 3);
384 const_cast<uint32_t&>(dev->device.flags) = 0;
385 const_cast<uint32_t&>(dev->device.width) = m->info.xres;
386 const_cast<uint32_t&>(dev->device.height) = m->info.yres;
387 const_cast<int&>(dev->device.stride) = stride;
388 const_cast<int&>(dev->device.format) = m->fbFormat;
389 const_cast<float&>(dev->device.xdpi) = m->xdpi;
390 const_cast<float&>(dev->device.ydpi) = m->ydpi;
391 const_cast<float&>(dev->device.fps) = m->fps;
392 const_cast<int&>(dev->device.minSwapInterval) =
393 PRIV_MIN_SWAP_INTERVAL;
394 const_cast<int&>(dev->device.maxSwapInterval) =
395 PRIV_MAX_SWAP_INTERVAL;
396 const_cast<int&>(dev->device.numFramebuffers) = m->numBuffers;
397 dev->device.setUpdateRect = 0;
398
399 *device = &dev->device.common;
400 }
401
402 // Close the gralloc module
403 gralloc_close(gralloc_device);
404 }
405 return status;
406 }
407