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5c7ab634 VH |
1 | /* |
2 | * omap_voutlib.c | |
3 | * | |
4 | * Copyright (C) 2005-2010 Texas Instruments. | |
5 | * | |
6 | * This file is licensed under the terms of the GNU General Public License | |
7 | * version 2. This program is licensed "as is" without any warranty of any | |
8 | * kind, whether express or implied. | |
9 | * | |
10 | * Based on the OMAP2 camera driver | |
11 | * Video-for-Linux (Version 2) camera capture driver for | |
12 | * the OMAP24xx camera controller. | |
13 | * | |
14 | * Author: Andy Lowe (source@mvista.com) | |
15 | * | |
16 | * Copyright (C) 2004 MontaVista Software, Inc. | |
17 | * Copyright (C) 2010 Texas Instruments. | |
18 | * | |
19 | */ | |
20 | ||
21 | #include <linux/module.h> | |
22 | #include <linux/errno.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/videodev2.h> | |
26 | ||
a137ac87 | 27 | #include <linux/dma-mapping.h> |
28 | ||
781a1622 | 29 | #include <video/omapfb_dss.h> |
5c7ab634 | 30 | |
a137ac87 | 31 | #include "omap_voutlib.h" |
32 | ||
5c7ab634 VH |
33 | MODULE_AUTHOR("Texas Instruments"); |
34 | MODULE_DESCRIPTION("OMAP Video library"); | |
35 | MODULE_LICENSE("GPL"); | |
36 | ||
37 | /* Return the default overlay cropping rectangle in crop given the image | |
38 | * size in pix and the video display size in fbuf. The default | |
39 | * cropping rectangle is the largest rectangle no larger than the capture size | |
40 | * that will fit on the display. The default cropping rectangle is centered in | |
41 | * the image. All dimensions and offsets are rounded down to even numbers. | |
42 | */ | |
43 | void omap_vout_default_crop(struct v4l2_pix_format *pix, | |
44 | struct v4l2_framebuffer *fbuf, struct v4l2_rect *crop) | |
45 | { | |
46 | crop->width = (pix->width < fbuf->fmt.width) ? | |
47 | pix->width : fbuf->fmt.width; | |
48 | crop->height = (pix->height < fbuf->fmt.height) ? | |
49 | pix->height : fbuf->fmt.height; | |
50 | crop->width &= ~1; | |
51 | crop->height &= ~1; | |
52 | crop->left = ((pix->width - crop->width) >> 1) & ~1; | |
53 | crop->top = ((pix->height - crop->height) >> 1) & ~1; | |
54 | } | |
55 | EXPORT_SYMBOL_GPL(omap_vout_default_crop); | |
56 | ||
57 | /* Given a new render window in new_win, adjust the window to the | |
58 | * nearest supported configuration. The adjusted window parameters are | |
59 | * returned in new_win. | |
25985edc | 60 | * Returns zero if successful, or -EINVAL if the requested window is |
5c7ab634 VH |
61 | * impossible and cannot reasonably be adjusted. |
62 | */ | |
63 | int omap_vout_try_window(struct v4l2_framebuffer *fbuf, | |
64 | struct v4l2_window *new_win) | |
65 | { | |
66 | struct v4l2_rect try_win; | |
67 | ||
68 | /* make a working copy of the new_win rectangle */ | |
69 | try_win = new_win->w; | |
70 | ||
71 | /* adjust the preview window so it fits on the display by clipping any | |
72 | * offscreen areas | |
73 | */ | |
74 | if (try_win.left < 0) { | |
75 | try_win.width += try_win.left; | |
76 | try_win.left = 0; | |
77 | } | |
78 | if (try_win.top < 0) { | |
79 | try_win.height += try_win.top; | |
80 | try_win.top = 0; | |
81 | } | |
82 | try_win.width = (try_win.width < fbuf->fmt.width) ? | |
83 | try_win.width : fbuf->fmt.width; | |
84 | try_win.height = (try_win.height < fbuf->fmt.height) ? | |
85 | try_win.height : fbuf->fmt.height; | |
86 | if (try_win.left + try_win.width > fbuf->fmt.width) | |
87 | try_win.width = fbuf->fmt.width - try_win.left; | |
88 | if (try_win.top + try_win.height > fbuf->fmt.height) | |
89 | try_win.height = fbuf->fmt.height - try_win.top; | |
90 | try_win.width &= ~1; | |
91 | try_win.height &= ~1; | |
92 | ||
93 | if (try_win.width <= 0 || try_win.height <= 0) | |
94 | return -EINVAL; | |
95 | ||
96 | /* We now have a valid preview window, so go with it */ | |
97 | new_win->w = try_win; | |
98 | new_win->field = V4L2_FIELD_ANY; | |
99 | return 0; | |
100 | } | |
101 | EXPORT_SYMBOL_GPL(omap_vout_try_window); | |
102 | ||
103 | /* Given a new render window in new_win, adjust the window to the | |
104 | * nearest supported configuration. The image cropping window in crop | |
105 | * will also be adjusted if necessary. Preference is given to keeping the | |
106 | * the window as close to the requested configuration as possible. If | |
107 | * successful, new_win, vout->win, and crop are updated. | |
25985edc | 108 | * Returns zero if successful, or -EINVAL if the requested preview window is |
5c7ab634 VH |
109 | * impossible and cannot reasonably be adjusted. |
110 | */ | |
111 | int omap_vout_new_window(struct v4l2_rect *crop, | |
112 | struct v4l2_window *win, struct v4l2_framebuffer *fbuf, | |
113 | struct v4l2_window *new_win) | |
114 | { | |
115 | int err; | |
116 | ||
117 | err = omap_vout_try_window(fbuf, new_win); | |
118 | if (err) | |
119 | return err; | |
120 | ||
121 | /* update our preview window */ | |
122 | win->w = new_win->w; | |
123 | win->field = new_win->field; | |
124 | win->chromakey = new_win->chromakey; | |
125 | ||
126 | /* Adjust the cropping window to allow for resizing limitation */ | |
950e2fb4 | 127 | if (omap_vout_dss_omap24xx()) { |
5c7ab634 VH |
128 | /* For 24xx limit is 8x to 1/2x scaling. */ |
129 | if ((crop->height/win->w.height) >= 2) | |
130 | crop->height = win->w.height * 2; | |
131 | ||
132 | if ((crop->width/win->w.width) >= 2) | |
133 | crop->width = win->w.width * 2; | |
134 | ||
135 | if (crop->width > 768) { | |
136 | /* The OMAP2420 vertical resizing line buffer is 768 | |
137 | * pixels wide. If the cropped image is wider than | |
138 | * 768 pixels then it cannot be vertically resized. | |
139 | */ | |
140 | if (crop->height != win->w.height) | |
141 | crop->width = 768; | |
142 | } | |
950e2fb4 | 143 | } else if (omap_vout_dss_omap34xx()) { |
5c7ab634 VH |
144 | /* For 34xx limit is 8x to 1/4x scaling. */ |
145 | if ((crop->height/win->w.height) >= 4) | |
146 | crop->height = win->w.height * 4; | |
147 | ||
148 | if ((crop->width/win->w.width) >= 4) | |
149 | crop->width = win->w.width * 4; | |
150 | } | |
151 | return 0; | |
152 | } | |
153 | EXPORT_SYMBOL_GPL(omap_vout_new_window); | |
154 | ||
155 | /* Given a new cropping rectangle in new_crop, adjust the cropping rectangle to | |
156 | * the nearest supported configuration. The image render window in win will | |
157 | * also be adjusted if necessary. The preview window is adjusted such that the | |
158 | * horizontal and vertical rescaling ratios stay constant. If the render | |
159 | * window would fall outside the display boundaries, the cropping rectangle | |
160 | * will also be adjusted to maintain the rescaling ratios. If successful, crop | |
161 | * and win are updated. | |
25985edc | 162 | * Returns zero if successful, or -EINVAL if the requested cropping rectangle is |
5c7ab634 VH |
163 | * impossible and cannot reasonably be adjusted. |
164 | */ | |
165 | int omap_vout_new_crop(struct v4l2_pix_format *pix, | |
166 | struct v4l2_rect *crop, struct v4l2_window *win, | |
167 | struct v4l2_framebuffer *fbuf, const struct v4l2_rect *new_crop) | |
168 | { | |
169 | struct v4l2_rect try_crop; | |
170 | unsigned long vresize, hresize; | |
171 | ||
172 | /* make a working copy of the new_crop rectangle */ | |
173 | try_crop = *new_crop; | |
174 | ||
175 | /* adjust the cropping rectangle so it fits in the image */ | |
176 | if (try_crop.left < 0) { | |
177 | try_crop.width += try_crop.left; | |
178 | try_crop.left = 0; | |
179 | } | |
180 | if (try_crop.top < 0) { | |
181 | try_crop.height += try_crop.top; | |
182 | try_crop.top = 0; | |
183 | } | |
184 | try_crop.width = (try_crop.width < pix->width) ? | |
185 | try_crop.width : pix->width; | |
186 | try_crop.height = (try_crop.height < pix->height) ? | |
187 | try_crop.height : pix->height; | |
188 | if (try_crop.left + try_crop.width > pix->width) | |
189 | try_crop.width = pix->width - try_crop.left; | |
190 | if (try_crop.top + try_crop.height > pix->height) | |
191 | try_crop.height = pix->height - try_crop.top; | |
192 | ||
193 | try_crop.width &= ~1; | |
194 | try_crop.height &= ~1; | |
195 | ||
196 | if (try_crop.width <= 0 || try_crop.height <= 0) | |
197 | return -EINVAL; | |
198 | ||
950e2fb4 | 199 | if (omap_vout_dss_omap24xx()) { |
e8bb10b8 | 200 | if (try_crop.height != win->w.height) { |
5c7ab634 VH |
201 | /* If we're resizing vertically, we can't support a |
202 | * crop width wider than 768 pixels. | |
203 | */ | |
204 | if (try_crop.width > 768) | |
205 | try_crop.width = 768; | |
206 | } | |
207 | } | |
208 | /* vertical resizing */ | |
e8bb10b8 | 209 | vresize = (1024 * try_crop.height) / win->w.height; |
950e2fb4 | 210 | if (omap_vout_dss_omap24xx() && (vresize > 2048)) |
5c7ab634 | 211 | vresize = 2048; |
950e2fb4 | 212 | else if (omap_vout_dss_omap34xx() && (vresize > 4096)) |
5c7ab634 VH |
213 | vresize = 4096; |
214 | ||
215 | win->w.height = ((1024 * try_crop.height) / vresize) & ~1; | |
216 | if (win->w.height == 0) | |
217 | win->w.height = 2; | |
218 | if (win->w.height + win->w.top > fbuf->fmt.height) { | |
219 | /* We made the preview window extend below the bottom of the | |
220 | * display, so clip it to the display boundary and resize the | |
221 | * cropping height to maintain the vertical resizing ratio. | |
222 | */ | |
223 | win->w.height = (fbuf->fmt.height - win->w.top) & ~1; | |
224 | if (try_crop.height == 0) | |
225 | try_crop.height = 2; | |
226 | } | |
227 | /* horizontal resizing */ | |
e8bb10b8 | 228 | hresize = (1024 * try_crop.width) / win->w.width; |
950e2fb4 | 229 | if (omap_vout_dss_omap24xx() && (hresize > 2048)) |
5c7ab634 | 230 | hresize = 2048; |
950e2fb4 | 231 | else if (omap_vout_dss_omap34xx() && (hresize > 4096)) |
5c7ab634 VH |
232 | hresize = 4096; |
233 | ||
234 | win->w.width = ((1024 * try_crop.width) / hresize) & ~1; | |
235 | if (win->w.width == 0) | |
236 | win->w.width = 2; | |
237 | if (win->w.width + win->w.left > fbuf->fmt.width) { | |
238 | /* We made the preview window extend past the right side of the | |
239 | * display, so clip it to the display boundary and resize the | |
240 | * cropping width to maintain the horizontal resizing ratio. | |
241 | */ | |
242 | win->w.width = (fbuf->fmt.width - win->w.left) & ~1; | |
243 | if (try_crop.width == 0) | |
244 | try_crop.width = 2; | |
245 | } | |
950e2fb4 | 246 | if (omap_vout_dss_omap24xx()) { |
5c7ab634 VH |
247 | if ((try_crop.height/win->w.height) >= 2) |
248 | try_crop.height = win->w.height * 2; | |
249 | ||
250 | if ((try_crop.width/win->w.width) >= 2) | |
251 | try_crop.width = win->w.width * 2; | |
252 | ||
253 | if (try_crop.width > 768) { | |
254 | /* The OMAP2420 vertical resizing line buffer is | |
255 | * 768 pixels wide. If the cropped image is wider | |
256 | * than 768 pixels then it cannot be vertically resized. | |
257 | */ | |
258 | if (try_crop.height != win->w.height) | |
259 | try_crop.width = 768; | |
260 | } | |
950e2fb4 | 261 | } else if (omap_vout_dss_omap34xx()) { |
5c7ab634 VH |
262 | if ((try_crop.height/win->w.height) >= 4) |
263 | try_crop.height = win->w.height * 4; | |
264 | ||
265 | if ((try_crop.width/win->w.width) >= 4) | |
266 | try_crop.width = win->w.width * 4; | |
267 | } | |
268 | /* update our cropping rectangle and we're done */ | |
269 | *crop = try_crop; | |
270 | return 0; | |
271 | } | |
272 | EXPORT_SYMBOL_GPL(omap_vout_new_crop); | |
273 | ||
274 | /* Given a new format in pix and fbuf, crop and win | |
275 | * structures are initialized to default values. crop | |
276 | * is initialized to the largest window size that will fit on the display. The | |
277 | * crop window is centered in the image. win is initialized to | |
278 | * the same size as crop and is centered on the display. | |
279 | * All sizes and offsets are constrained to be even numbers. | |
280 | */ | |
281 | void omap_vout_new_format(struct v4l2_pix_format *pix, | |
282 | struct v4l2_framebuffer *fbuf, struct v4l2_rect *crop, | |
283 | struct v4l2_window *win) | |
284 | { | |
285 | /* crop defines the preview source window in the image capture | |
286 | * buffer | |
287 | */ | |
288 | omap_vout_default_crop(pix, fbuf, crop); | |
289 | ||
290 | /* win defines the preview target window on the display */ | |
291 | win->w.width = crop->width; | |
292 | win->w.height = crop->height; | |
293 | win->w.left = ((fbuf->fmt.width - win->w.width) >> 1) & ~1; | |
294 | win->w.top = ((fbuf->fmt.height - win->w.height) >> 1) & ~1; | |
295 | } | |
296 | EXPORT_SYMBOL_GPL(omap_vout_new_format); | |
297 | ||
a137ac87 | 298 | /* |
299 | * Allocate buffers | |
300 | */ | |
301 | unsigned long omap_vout_alloc_buffer(u32 buf_size, u32 *phys_addr) | |
302 | { | |
303 | u32 order, size; | |
304 | unsigned long virt_addr, addr; | |
305 | ||
306 | size = PAGE_ALIGN(buf_size); | |
307 | order = get_order(size); | |
308 | virt_addr = __get_free_pages(GFP_KERNEL, order); | |
309 | addr = virt_addr; | |
310 | ||
311 | if (virt_addr) { | |
312 | while (size > 0) { | |
313 | SetPageReserved(virt_to_page(addr)); | |
314 | addr += PAGE_SIZE; | |
315 | size -= PAGE_SIZE; | |
316 | } | |
317 | } | |
318 | *phys_addr = (u32) virt_to_phys((void *) virt_addr); | |
319 | return virt_addr; | |
320 | } | |
321 | ||
322 | /* | |
323 | * Free buffers | |
324 | */ | |
325 | void omap_vout_free_buffer(unsigned long virtaddr, u32 buf_size) | |
326 | { | |
327 | u32 order, size; | |
328 | unsigned long addr = virtaddr; | |
329 | ||
330 | size = PAGE_ALIGN(buf_size); | |
331 | order = get_order(size); | |
332 | ||
333 | while (size > 0) { | |
334 | ClearPageReserved(virt_to_page(addr)); | |
335 | addr += PAGE_SIZE; | |
336 | size -= PAGE_SIZE; | |
337 | } | |
338 | free_pages((unsigned long) virtaddr, order); | |
339 | } | |
950e2fb4 TV |
340 | |
341 | bool omap_vout_dss_omap24xx(void) | |
342 | { | |
343 | return omapdss_get_version() == OMAPDSS_VER_OMAP24xx; | |
344 | } | |
345 | ||
346 | bool omap_vout_dss_omap34xx(void) | |
347 | { | |
348 | switch (omapdss_get_version()) { | |
349 | case OMAPDSS_VER_OMAP34xx_ES1: | |
350 | case OMAPDSS_VER_OMAP34xx_ES3: | |
351 | case OMAPDSS_VER_OMAP3630: | |
352 | case OMAPDSS_VER_AM35xx: | |
353 | return true; | |
354 | default: | |
355 | return false; | |
356 | } | |
357 | } |