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445e258f AT |
1 | /* |
2 | * omap_vout_vrfb.c | |
3 | * | |
4 | * Copyright (C) 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 | */ | |
11 | ||
12 | #include <linux/sched.h> | |
13 | #include <linux/platform_device.h> | |
14 | #include <linux/videodev2.h> | |
15 | ||
16 | #include <media/videobuf-dma-contig.h> | |
17 | #include <media/v4l2-device.h> | |
18 | ||
19 | #include <plat/dma.h> | |
20 | #include <plat/vrfb.h> | |
21 | ||
22 | #include "omap_voutdef.h" | |
23 | #include "omap_voutlib.h" | |
24 | ||
25 | /* | |
26 | * Function for allocating video buffers | |
27 | */ | |
28 | static int omap_vout_allocate_vrfb_buffers(struct omap_vout_device *vout, | |
29 | unsigned int *count, int startindex) | |
30 | { | |
31 | int i, j; | |
32 | ||
33 | for (i = 0; i < *count; i++) { | |
34 | if (!vout->smsshado_virt_addr[i]) { | |
35 | vout->smsshado_virt_addr[i] = | |
36 | omap_vout_alloc_buffer(vout->smsshado_size, | |
37 | &vout->smsshado_phy_addr[i]); | |
38 | } | |
39 | if (!vout->smsshado_virt_addr[i] && startindex != -1) { | |
40 | if (V4L2_MEMORY_MMAP == vout->memory && i >= startindex) | |
41 | break; | |
42 | } | |
43 | if (!vout->smsshado_virt_addr[i]) { | |
44 | for (j = 0; j < i; j++) { | |
45 | omap_vout_free_buffer( | |
46 | vout->smsshado_virt_addr[j], | |
47 | vout->smsshado_size); | |
48 | vout->smsshado_virt_addr[j] = 0; | |
49 | vout->smsshado_phy_addr[j] = 0; | |
50 | } | |
51 | *count = 0; | |
52 | return -ENOMEM; | |
53 | } | |
54 | memset((void *) vout->smsshado_virt_addr[i], 0, | |
55 | vout->smsshado_size); | |
56 | } | |
57 | return 0; | |
58 | } | |
59 | ||
60 | /* | |
61 | * Wakes up the application once the DMA transfer to VRFB space is completed. | |
62 | */ | |
63 | static void omap_vout_vrfb_dma_tx_callback(int lch, u16 ch_status, void *data) | |
64 | { | |
65 | struct vid_vrfb_dma *t = (struct vid_vrfb_dma *) data; | |
66 | ||
67 | t->tx_status = 1; | |
68 | wake_up_interruptible(&t->wait); | |
69 | } | |
70 | ||
71 | /* | |
72 | * Free VRFB buffers | |
73 | */ | |
74 | void omap_vout_free_vrfb_buffers(struct omap_vout_device *vout) | |
75 | { | |
76 | int j; | |
77 | ||
78 | for (j = 0; j < VRFB_NUM_BUFS; j++) { | |
79 | omap_vout_free_buffer(vout->smsshado_virt_addr[j], | |
80 | vout->smsshado_size); | |
81 | vout->smsshado_virt_addr[j] = 0; | |
82 | vout->smsshado_phy_addr[j] = 0; | |
83 | } | |
84 | } | |
85 | ||
86 | int omap_vout_setup_vrfb_bufs(struct platform_device *pdev, int vid_num, | |
90ab5ee9 | 87 | bool static_vrfb_allocation) |
445e258f AT |
88 | { |
89 | int ret = 0, i, j; | |
90 | struct omap_vout_device *vout; | |
91 | struct video_device *vfd; | |
92 | int image_width, image_height; | |
93 | int vrfb_num_bufs = VRFB_NUM_BUFS; | |
94 | struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev); | |
95 | struct omap2video_device *vid_dev = | |
96 | container_of(v4l2_dev, struct omap2video_device, v4l2_dev); | |
97 | ||
98 | vout = vid_dev->vouts[vid_num]; | |
99 | vfd = vout->vfd; | |
100 | ||
101 | for (i = 0; i < VRFB_NUM_BUFS; i++) { | |
102 | if (omap_vrfb_request_ctx(&vout->vrfb_context[i])) { | |
103 | dev_info(&pdev->dev, ": VRFB allocation failed\n"); | |
104 | for (j = 0; j < i; j++) | |
105 | omap_vrfb_release_ctx(&vout->vrfb_context[j]); | |
106 | ret = -ENOMEM; | |
107 | goto free_buffers; | |
108 | } | |
109 | } | |
110 | ||
111 | /* Calculate VRFB memory size */ | |
112 | /* allocate for worst case size */ | |
113 | image_width = VID_MAX_WIDTH / TILE_SIZE; | |
114 | if (VID_MAX_WIDTH % TILE_SIZE) | |
115 | image_width++; | |
116 | ||
117 | image_width = image_width * TILE_SIZE; | |
118 | image_height = VID_MAX_HEIGHT / TILE_SIZE; | |
119 | ||
120 | if (VID_MAX_HEIGHT % TILE_SIZE) | |
121 | image_height++; | |
122 | ||
123 | image_height = image_height * TILE_SIZE; | |
124 | vout->smsshado_size = PAGE_ALIGN(image_width * image_height * 2 * 2); | |
125 | ||
126 | /* | |
127 | * Request and Initialize DMA, for DMA based VRFB transfer | |
128 | */ | |
129 | vout->vrfb_dma_tx.dev_id = OMAP_DMA_NO_DEVICE; | |
130 | vout->vrfb_dma_tx.dma_ch = -1; | |
131 | vout->vrfb_dma_tx.req_status = DMA_CHAN_ALLOTED; | |
132 | ret = omap_request_dma(vout->vrfb_dma_tx.dev_id, "VRFB DMA TX", | |
133 | omap_vout_vrfb_dma_tx_callback, | |
134 | (void *) &vout->vrfb_dma_tx, &vout->vrfb_dma_tx.dma_ch); | |
135 | if (ret < 0) { | |
136 | vout->vrfb_dma_tx.req_status = DMA_CHAN_NOT_ALLOTED; | |
137 | dev_info(&pdev->dev, ": failed to allocate DMA Channel for" | |
138 | " video%d\n", vfd->minor); | |
139 | } | |
140 | init_waitqueue_head(&vout->vrfb_dma_tx.wait); | |
141 | ||
142 | /* statically allocated the VRFB buffer is done through | |
143 | commands line aruments */ | |
144 | if (static_vrfb_allocation) { | |
145 | if (omap_vout_allocate_vrfb_buffers(vout, &vrfb_num_bufs, -1)) { | |
146 | ret = -ENOMEM; | |
147 | goto release_vrfb_ctx; | |
148 | } | |
149 | vout->vrfb_static_allocation = 1; | |
150 | } | |
151 | return 0; | |
152 | ||
153 | release_vrfb_ctx: | |
154 | for (j = 0; j < VRFB_NUM_BUFS; j++) | |
155 | omap_vrfb_release_ctx(&vout->vrfb_context[j]); | |
156 | free_buffers: | |
157 | omap_vout_free_buffers(vout); | |
158 | ||
159 | return ret; | |
160 | } | |
161 | ||
162 | /* | |
163 | * Release the VRFB context once the module exits | |
164 | */ | |
165 | void omap_vout_release_vrfb(struct omap_vout_device *vout) | |
166 | { | |
167 | int i; | |
168 | ||
169 | for (i = 0; i < VRFB_NUM_BUFS; i++) | |
170 | omap_vrfb_release_ctx(&vout->vrfb_context[i]); | |
171 | ||
172 | if (vout->vrfb_dma_tx.req_status == DMA_CHAN_ALLOTED) { | |
173 | vout->vrfb_dma_tx.req_status = DMA_CHAN_NOT_ALLOTED; | |
174 | omap_free_dma(vout->vrfb_dma_tx.dma_ch); | |
175 | } | |
176 | } | |
177 | ||
178 | /* | |
179 | * Allocate the buffers for the VRFB space. Data is copied from V4L2 | |
180 | * buffers to the VRFB buffers using the DMA engine. | |
181 | */ | |
182 | int omap_vout_vrfb_buffer_setup(struct omap_vout_device *vout, | |
183 | unsigned int *count, unsigned int startindex) | |
184 | { | |
185 | int i; | |
186 | bool yuv_mode; | |
187 | ||
188 | if (!is_rotation_enabled(vout)) | |
189 | return 0; | |
190 | ||
191 | /* If rotation is enabled, allocate memory for VRFB space also */ | |
192 | *count = *count > VRFB_NUM_BUFS ? VRFB_NUM_BUFS : *count; | |
193 | ||
194 | /* Allocate the VRFB buffers only if the buffers are not | |
195 | * allocated during init time. | |
196 | */ | |
197 | if (!vout->vrfb_static_allocation) | |
198 | if (omap_vout_allocate_vrfb_buffers(vout, count, startindex)) | |
199 | return -ENOMEM; | |
200 | ||
201 | if (vout->dss_mode == OMAP_DSS_COLOR_YUV2 || | |
202 | vout->dss_mode == OMAP_DSS_COLOR_UYVY) | |
203 | yuv_mode = true; | |
204 | else | |
205 | yuv_mode = false; | |
206 | ||
207 | for (i = 0; i < *count; i++) | |
208 | omap_vrfb_setup(&vout->vrfb_context[i], | |
209 | vout->smsshado_phy_addr[i], vout->pix.width, | |
210 | vout->pix.height, vout->bpp, yuv_mode); | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | int omap_vout_prepare_vrfb(struct omap_vout_device *vout, | |
216 | struct videobuf_buffer *vb) | |
217 | { | |
218 | dma_addr_t dmabuf; | |
219 | struct vid_vrfb_dma *tx; | |
220 | enum dss_rotation rotation; | |
221 | u32 dest_frame_index = 0, src_element_index = 0; | |
222 | u32 dest_element_index = 0, src_frame_index = 0; | |
223 | u32 elem_count = 0, frame_count = 0, pixsize = 2; | |
224 | ||
225 | if (!is_rotation_enabled(vout)) | |
226 | return 0; | |
227 | ||
228 | dmabuf = vout->buf_phy_addr[vb->i]; | |
229 | /* If rotation is enabled, copy input buffer into VRFB | |
230 | * memory space using DMA. We are copying input buffer | |
231 | * into VRFB memory space of desired angle and DSS will | |
232 | * read image VRFB memory for 0 degree angle | |
233 | */ | |
234 | pixsize = vout->bpp * vout->vrfb_bpp; | |
235 | /* | |
236 | * DMA transfer in double index mode | |
237 | */ | |
238 | ||
239 | /* Frame index */ | |
240 | dest_frame_index = ((MAX_PIXELS_PER_LINE * pixsize) - | |
241 | (vout->pix.width * vout->bpp)) + 1; | |
242 | ||
243 | /* Source and destination parameters */ | |
244 | src_element_index = 0; | |
245 | src_frame_index = 0; | |
246 | dest_element_index = 1; | |
247 | /* Number of elements per frame */ | |
248 | elem_count = vout->pix.width * vout->bpp; | |
249 | frame_count = vout->pix.height; | |
250 | tx = &vout->vrfb_dma_tx; | |
251 | tx->tx_status = 0; | |
252 | omap_set_dma_transfer_params(tx->dma_ch, OMAP_DMA_DATA_TYPE_S32, | |
253 | (elem_count / 4), frame_count, OMAP_DMA_SYNC_ELEMENT, | |
254 | tx->dev_id, 0x0); | |
255 | /* src_port required only for OMAP1 */ | |
256 | omap_set_dma_src_params(tx->dma_ch, 0, OMAP_DMA_AMODE_POST_INC, | |
257 | dmabuf, src_element_index, src_frame_index); | |
258 | /*set dma source burst mode for VRFB */ | |
259 | omap_set_dma_src_burst_mode(tx->dma_ch, OMAP_DMA_DATA_BURST_16); | |
260 | rotation = calc_rotation(vout); | |
261 | ||
262 | /* dest_port required only for OMAP1 */ | |
263 | omap_set_dma_dest_params(tx->dma_ch, 0, OMAP_DMA_AMODE_DOUBLE_IDX, | |
264 | vout->vrfb_context[vb->i].paddr[0], dest_element_index, | |
265 | dest_frame_index); | |
266 | /*set dma dest burst mode for VRFB */ | |
267 | omap_set_dma_dest_burst_mode(tx->dma_ch, OMAP_DMA_DATA_BURST_16); | |
268 | omap_dma_set_global_params(DMA_DEFAULT_ARB_RATE, 0x20, 0); | |
269 | ||
270 | omap_start_dma(tx->dma_ch); | |
271 | interruptible_sleep_on_timeout(&tx->wait, VRFB_TX_TIMEOUT); | |
272 | ||
273 | if (tx->tx_status == 0) { | |
274 | omap_stop_dma(tx->dma_ch); | |
275 | return -EINVAL; | |
276 | } | |
277 | /* Store buffers physical address into an array. Addresses | |
278 | * from this array will be used to configure DSS */ | |
279 | vout->queued_buf_addr[vb->i] = (u8 *) | |
280 | vout->vrfb_context[vb->i].paddr[rotation]; | |
281 | return 0; | |
282 | } | |
283 | ||
284 | /* | |
285 | * Calculate the buffer offsets from which the streaming should | |
286 | * start. This offset calculation is mainly required because of | |
287 | * the VRFB 32 pixels alignment with rotation. | |
288 | */ | |
289 | void omap_vout_calculate_vrfb_offset(struct omap_vout_device *vout) | |
290 | { | |
291 | enum dss_rotation rotation; | |
292 | bool mirroring = vout->mirror; | |
293 | struct v4l2_rect *crop = &vout->crop; | |
294 | struct v4l2_pix_format *pix = &vout->pix; | |
295 | int *cropped_offset = &vout->cropped_offset; | |
296 | int vr_ps = 1, ps = 2, temp_ps = 2; | |
297 | int offset = 0, ctop = 0, cleft = 0, line_length = 0; | |
298 | ||
299 | rotation = calc_rotation(vout); | |
300 | ||
301 | if (V4L2_PIX_FMT_YUYV == pix->pixelformat || | |
302 | V4L2_PIX_FMT_UYVY == pix->pixelformat) { | |
303 | if (is_rotation_enabled(vout)) { | |
304 | /* | |
305 | * ps - Actual pixel size for YUYV/UYVY for | |
306 | * VRFB/Mirroring is 4 bytes | |
307 | * vr_ps - Virtually pixel size for YUYV/UYVY is | |
308 | * 2 bytes | |
309 | */ | |
310 | ps = 4; | |
311 | vr_ps = 2; | |
312 | } else { | |
313 | ps = 2; /* otherwise the pixel size is 2 byte */ | |
314 | } | |
315 | } else if (V4L2_PIX_FMT_RGB32 == pix->pixelformat) { | |
316 | ps = 4; | |
317 | } else if (V4L2_PIX_FMT_RGB24 == pix->pixelformat) { | |
318 | ps = 3; | |
319 | } | |
320 | vout->ps = ps; | |
321 | vout->vr_ps = vr_ps; | |
322 | ||
323 | if (is_rotation_enabled(vout)) { | |
324 | line_length = MAX_PIXELS_PER_LINE; | |
325 | ctop = (pix->height - crop->height) - crop->top; | |
326 | cleft = (pix->width - crop->width) - crop->left; | |
327 | } else { | |
328 | line_length = pix->width; | |
329 | } | |
330 | vout->line_length = line_length; | |
331 | switch (rotation) { | |
332 | case dss_rotation_90_degree: | |
333 | offset = vout->vrfb_context[0].yoffset * | |
334 | vout->vrfb_context[0].bytespp; | |
335 | temp_ps = ps / vr_ps; | |
336 | if (mirroring == 0) { | |
337 | *cropped_offset = offset + line_length * | |
338 | temp_ps * cleft + crop->top * temp_ps; | |
339 | } else { | |
340 | *cropped_offset = offset + line_length * temp_ps * | |
341 | cleft + crop->top * temp_ps + (line_length * | |
342 | ((crop->width / (vr_ps)) - 1) * ps); | |
343 | } | |
344 | break; | |
345 | case dss_rotation_180_degree: | |
346 | offset = ((MAX_PIXELS_PER_LINE * vout->vrfb_context[0].yoffset * | |
347 | vout->vrfb_context[0].bytespp) + | |
348 | (vout->vrfb_context[0].xoffset * | |
349 | vout->vrfb_context[0].bytespp)); | |
350 | if (mirroring == 0) { | |
351 | *cropped_offset = offset + (line_length * ps * ctop) + | |
352 | (cleft / vr_ps) * ps; | |
353 | ||
354 | } else { | |
355 | *cropped_offset = offset + (line_length * ps * ctop) + | |
356 | (cleft / vr_ps) * ps + (line_length * | |
357 | (crop->height - 1) * ps); | |
358 | } | |
359 | break; | |
360 | case dss_rotation_270_degree: | |
361 | offset = MAX_PIXELS_PER_LINE * vout->vrfb_context[0].xoffset * | |
362 | vout->vrfb_context[0].bytespp; | |
363 | temp_ps = ps / vr_ps; | |
364 | if (mirroring == 0) { | |
365 | *cropped_offset = offset + line_length * | |
366 | temp_ps * crop->left + ctop * ps; | |
367 | } else { | |
368 | *cropped_offset = offset + line_length * | |
369 | temp_ps * crop->left + ctop * ps + | |
370 | (line_length * ((crop->width / vr_ps) - 1) * | |
371 | ps); | |
372 | } | |
373 | break; | |
374 | case dss_rotation_0_degree: | |
375 | if (mirroring == 0) { | |
376 | *cropped_offset = (line_length * ps) * | |
377 | crop->top + (crop->left / vr_ps) * ps; | |
378 | } else { | |
379 | *cropped_offset = (line_length * ps) * | |
380 | crop->top + (crop->left / vr_ps) * ps + | |
381 | (line_length * (crop->height - 1) * ps); | |
382 | } | |
383 | break; | |
384 | default: | |
385 | *cropped_offset = (line_length * ps * crop->top) / | |
386 | vr_ps + (crop->left * ps) / vr_ps + | |
387 | ((crop->width / vr_ps) - 1) * ps; | |
388 | break; | |
389 | } | |
390 | } |