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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 | ||
45c3eb7d | 19 | #include <linux/omap-dma.h> |
6a1c9f6d | 20 | #include <video/omapvrfb.h> |
445e258f AT |
21 | |
22 | #include "omap_voutdef.h" | |
23 | #include "omap_voutlib.h" | |
ac0b2b30 | 24 | #include "omap_vout_vrfb.h" |
445e258f | 25 | |
8c4cc005 LV |
26 | #define OMAP_DMA_NO_DEVICE 0 |
27 | ||
445e258f AT |
28 | /* |
29 | * Function for allocating video buffers | |
30 | */ | |
31 | static int omap_vout_allocate_vrfb_buffers(struct omap_vout_device *vout, | |
32 | unsigned int *count, int startindex) | |
33 | { | |
34 | int i, j; | |
35 | ||
36 | for (i = 0; i < *count; i++) { | |
37 | if (!vout->smsshado_virt_addr[i]) { | |
38 | vout->smsshado_virt_addr[i] = | |
39 | omap_vout_alloc_buffer(vout->smsshado_size, | |
40 | &vout->smsshado_phy_addr[i]); | |
41 | } | |
42 | if (!vout->smsshado_virt_addr[i] && startindex != -1) { | |
43 | if (V4L2_MEMORY_MMAP == vout->memory && i >= startindex) | |
44 | break; | |
45 | } | |
46 | if (!vout->smsshado_virt_addr[i]) { | |
47 | for (j = 0; j < i; j++) { | |
48 | omap_vout_free_buffer( | |
49 | vout->smsshado_virt_addr[j], | |
50 | vout->smsshado_size); | |
51 | vout->smsshado_virt_addr[j] = 0; | |
52 | vout->smsshado_phy_addr[j] = 0; | |
53 | } | |
54 | *count = 0; | |
55 | return -ENOMEM; | |
56 | } | |
57 | memset((void *) vout->smsshado_virt_addr[i], 0, | |
58 | vout->smsshado_size); | |
59 | } | |
60 | return 0; | |
61 | } | |
62 | ||
63 | /* | |
64 | * Wakes up the application once the DMA transfer to VRFB space is completed. | |
65 | */ | |
66 | static void omap_vout_vrfb_dma_tx_callback(int lch, u16 ch_status, void *data) | |
67 | { | |
68 | struct vid_vrfb_dma *t = (struct vid_vrfb_dma *) data; | |
69 | ||
70 | t->tx_status = 1; | |
71 | wake_up_interruptible(&t->wait); | |
72 | } | |
73 | ||
74 | /* | |
75 | * Free VRFB buffers | |
76 | */ | |
77 | void omap_vout_free_vrfb_buffers(struct omap_vout_device *vout) | |
78 | { | |
79 | int j; | |
80 | ||
81 | for (j = 0; j < VRFB_NUM_BUFS; j++) { | |
b446631c LP |
82 | if (vout->smsshado_virt_addr[j]) { |
83 | omap_vout_free_buffer(vout->smsshado_virt_addr[j], | |
84 | vout->smsshado_size); | |
85 | vout->smsshado_virt_addr[j] = 0; | |
86 | vout->smsshado_phy_addr[j] = 0; | |
87 | } | |
445e258f AT |
88 | } |
89 | } | |
90 | ||
91 | int omap_vout_setup_vrfb_bufs(struct platform_device *pdev, int vid_num, | |
90ab5ee9 | 92 | bool static_vrfb_allocation) |
445e258f AT |
93 | { |
94 | int ret = 0, i, j; | |
95 | struct omap_vout_device *vout; | |
96 | struct video_device *vfd; | |
97 | int image_width, image_height; | |
98 | int vrfb_num_bufs = VRFB_NUM_BUFS; | |
99 | struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev); | |
100 | struct omap2video_device *vid_dev = | |
101 | container_of(v4l2_dev, struct omap2video_device, v4l2_dev); | |
102 | ||
103 | vout = vid_dev->vouts[vid_num]; | |
104 | vfd = vout->vfd; | |
105 | ||
106 | for (i = 0; i < VRFB_NUM_BUFS; i++) { | |
107 | if (omap_vrfb_request_ctx(&vout->vrfb_context[i])) { | |
108 | dev_info(&pdev->dev, ": VRFB allocation failed\n"); | |
109 | for (j = 0; j < i; j++) | |
110 | omap_vrfb_release_ctx(&vout->vrfb_context[j]); | |
111 | ret = -ENOMEM; | |
112 | goto free_buffers; | |
113 | } | |
114 | } | |
115 | ||
116 | /* Calculate VRFB memory size */ | |
117 | /* allocate for worst case size */ | |
118 | image_width = VID_MAX_WIDTH / TILE_SIZE; | |
119 | if (VID_MAX_WIDTH % TILE_SIZE) | |
120 | image_width++; | |
121 | ||
122 | image_width = image_width * TILE_SIZE; | |
123 | image_height = VID_MAX_HEIGHT / TILE_SIZE; | |
124 | ||
125 | if (VID_MAX_HEIGHT % TILE_SIZE) | |
126 | image_height++; | |
127 | ||
128 | image_height = image_height * TILE_SIZE; | |
129 | vout->smsshado_size = PAGE_ALIGN(image_width * image_height * 2 * 2); | |
130 | ||
131 | /* | |
132 | * Request and Initialize DMA, for DMA based VRFB transfer | |
133 | */ | |
134 | vout->vrfb_dma_tx.dev_id = OMAP_DMA_NO_DEVICE; | |
135 | vout->vrfb_dma_tx.dma_ch = -1; | |
136 | vout->vrfb_dma_tx.req_status = DMA_CHAN_ALLOTED; | |
137 | ret = omap_request_dma(vout->vrfb_dma_tx.dev_id, "VRFB DMA TX", | |
138 | omap_vout_vrfb_dma_tx_callback, | |
139 | (void *) &vout->vrfb_dma_tx, &vout->vrfb_dma_tx.dma_ch); | |
140 | if (ret < 0) { | |
141 | vout->vrfb_dma_tx.req_status = DMA_CHAN_NOT_ALLOTED; | |
bc39030b MCC |
142 | dev_info(&pdev->dev, |
143 | ": failed to allocate DMA Channel for video%d\n", | |
144 | vfd->minor); | |
445e258f AT |
145 | } |
146 | init_waitqueue_head(&vout->vrfb_dma_tx.wait); | |
147 | ||
148 | /* statically allocated the VRFB buffer is done through | |
149 | commands line aruments */ | |
150 | if (static_vrfb_allocation) { | |
151 | if (omap_vout_allocate_vrfb_buffers(vout, &vrfb_num_bufs, -1)) { | |
152 | ret = -ENOMEM; | |
153 | goto release_vrfb_ctx; | |
154 | } | |
160ac0ba | 155 | vout->vrfb_static_allocation = true; |
445e258f AT |
156 | } |
157 | return 0; | |
158 | ||
159 | release_vrfb_ctx: | |
160 | for (j = 0; j < VRFB_NUM_BUFS; j++) | |
161 | omap_vrfb_release_ctx(&vout->vrfb_context[j]); | |
162 | free_buffers: | |
163 | omap_vout_free_buffers(vout); | |
164 | ||
165 | return ret; | |
166 | } | |
167 | ||
168 | /* | |
169 | * Release the VRFB context once the module exits | |
170 | */ | |
171 | void omap_vout_release_vrfb(struct omap_vout_device *vout) | |
172 | { | |
173 | int i; | |
174 | ||
175 | for (i = 0; i < VRFB_NUM_BUFS; i++) | |
176 | omap_vrfb_release_ctx(&vout->vrfb_context[i]); | |
177 | ||
178 | if (vout->vrfb_dma_tx.req_status == DMA_CHAN_ALLOTED) { | |
179 | vout->vrfb_dma_tx.req_status = DMA_CHAN_NOT_ALLOTED; | |
180 | omap_free_dma(vout->vrfb_dma_tx.dma_ch); | |
181 | } | |
182 | } | |
183 | ||
184 | /* | |
185 | * Allocate the buffers for the VRFB space. Data is copied from V4L2 | |
186 | * buffers to the VRFB buffers using the DMA engine. | |
187 | */ | |
188 | int omap_vout_vrfb_buffer_setup(struct omap_vout_device *vout, | |
189 | unsigned int *count, unsigned int startindex) | |
190 | { | |
191 | int i; | |
192 | bool yuv_mode; | |
193 | ||
194 | if (!is_rotation_enabled(vout)) | |
195 | return 0; | |
196 | ||
197 | /* If rotation is enabled, allocate memory for VRFB space also */ | |
198 | *count = *count > VRFB_NUM_BUFS ? VRFB_NUM_BUFS : *count; | |
199 | ||
200 | /* Allocate the VRFB buffers only if the buffers are not | |
201 | * allocated during init time. | |
202 | */ | |
203 | if (!vout->vrfb_static_allocation) | |
204 | if (omap_vout_allocate_vrfb_buffers(vout, count, startindex)) | |
205 | return -ENOMEM; | |
206 | ||
207 | if (vout->dss_mode == OMAP_DSS_COLOR_YUV2 || | |
208 | vout->dss_mode == OMAP_DSS_COLOR_UYVY) | |
209 | yuv_mode = true; | |
210 | else | |
211 | yuv_mode = false; | |
212 | ||
213 | for (i = 0; i < *count; i++) | |
214 | omap_vrfb_setup(&vout->vrfb_context[i], | |
215 | vout->smsshado_phy_addr[i], vout->pix.width, | |
216 | vout->pix.height, vout->bpp, yuv_mode); | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
221 | int omap_vout_prepare_vrfb(struct omap_vout_device *vout, | |
222 | struct videobuf_buffer *vb) | |
223 | { | |
224 | dma_addr_t dmabuf; | |
225 | struct vid_vrfb_dma *tx; | |
226 | enum dss_rotation rotation; | |
227 | u32 dest_frame_index = 0, src_element_index = 0; | |
228 | u32 dest_element_index = 0, src_frame_index = 0; | |
229 | u32 elem_count = 0, frame_count = 0, pixsize = 2; | |
230 | ||
231 | if (!is_rotation_enabled(vout)) | |
232 | return 0; | |
233 | ||
234 | dmabuf = vout->buf_phy_addr[vb->i]; | |
235 | /* If rotation is enabled, copy input buffer into VRFB | |
236 | * memory space using DMA. We are copying input buffer | |
237 | * into VRFB memory space of desired angle and DSS will | |
238 | * read image VRFB memory for 0 degree angle | |
239 | */ | |
240 | pixsize = vout->bpp * vout->vrfb_bpp; | |
241 | /* | |
242 | * DMA transfer in double index mode | |
243 | */ | |
244 | ||
245 | /* Frame index */ | |
246 | dest_frame_index = ((MAX_PIXELS_PER_LINE * pixsize) - | |
247 | (vout->pix.width * vout->bpp)) + 1; | |
248 | ||
249 | /* Source and destination parameters */ | |
250 | src_element_index = 0; | |
251 | src_frame_index = 0; | |
252 | dest_element_index = 1; | |
253 | /* Number of elements per frame */ | |
254 | elem_count = vout->pix.width * vout->bpp; | |
255 | frame_count = vout->pix.height; | |
256 | tx = &vout->vrfb_dma_tx; | |
257 | tx->tx_status = 0; | |
258 | omap_set_dma_transfer_params(tx->dma_ch, OMAP_DMA_DATA_TYPE_S32, | |
259 | (elem_count / 4), frame_count, OMAP_DMA_SYNC_ELEMENT, | |
260 | tx->dev_id, 0x0); | |
261 | /* src_port required only for OMAP1 */ | |
262 | omap_set_dma_src_params(tx->dma_ch, 0, OMAP_DMA_AMODE_POST_INC, | |
263 | dmabuf, src_element_index, src_frame_index); | |
264 | /*set dma source burst mode for VRFB */ | |
265 | omap_set_dma_src_burst_mode(tx->dma_ch, OMAP_DMA_DATA_BURST_16); | |
266 | rotation = calc_rotation(vout); | |
267 | ||
268 | /* dest_port required only for OMAP1 */ | |
269 | omap_set_dma_dest_params(tx->dma_ch, 0, OMAP_DMA_AMODE_DOUBLE_IDX, | |
270 | vout->vrfb_context[vb->i].paddr[0], dest_element_index, | |
271 | dest_frame_index); | |
272 | /*set dma dest burst mode for VRFB */ | |
273 | omap_set_dma_dest_burst_mode(tx->dma_ch, OMAP_DMA_DATA_BURST_16); | |
274 | omap_dma_set_global_params(DMA_DEFAULT_ARB_RATE, 0x20, 0); | |
275 | ||
276 | omap_start_dma(tx->dma_ch); | |
6a859e09 AB |
277 | wait_event_interruptible_timeout(tx->wait, tx->tx_status == 1, |
278 | VRFB_TX_TIMEOUT); | |
445e258f AT |
279 | |
280 | if (tx->tx_status == 0) { | |
281 | omap_stop_dma(tx->dma_ch); | |
282 | return -EINVAL; | |
283 | } | |
284 | /* Store buffers physical address into an array. Addresses | |
285 | * from this array will be used to configure DSS */ | |
286 | vout->queued_buf_addr[vb->i] = (u8 *) | |
287 | vout->vrfb_context[vb->i].paddr[rotation]; | |
288 | return 0; | |
289 | } | |
290 | ||
291 | /* | |
292 | * Calculate the buffer offsets from which the streaming should | |
293 | * start. This offset calculation is mainly required because of | |
294 | * the VRFB 32 pixels alignment with rotation. | |
295 | */ | |
296 | void omap_vout_calculate_vrfb_offset(struct omap_vout_device *vout) | |
297 | { | |
298 | enum dss_rotation rotation; | |
299 | bool mirroring = vout->mirror; | |
300 | struct v4l2_rect *crop = &vout->crop; | |
301 | struct v4l2_pix_format *pix = &vout->pix; | |
302 | int *cropped_offset = &vout->cropped_offset; | |
303 | int vr_ps = 1, ps = 2, temp_ps = 2; | |
304 | int offset = 0, ctop = 0, cleft = 0, line_length = 0; | |
305 | ||
306 | rotation = calc_rotation(vout); | |
307 | ||
308 | if (V4L2_PIX_FMT_YUYV == pix->pixelformat || | |
309 | V4L2_PIX_FMT_UYVY == pix->pixelformat) { | |
310 | if (is_rotation_enabled(vout)) { | |
311 | /* | |
312 | * ps - Actual pixel size for YUYV/UYVY for | |
313 | * VRFB/Mirroring is 4 bytes | |
314 | * vr_ps - Virtually pixel size for YUYV/UYVY is | |
315 | * 2 bytes | |
316 | */ | |
317 | ps = 4; | |
318 | vr_ps = 2; | |
319 | } else { | |
320 | ps = 2; /* otherwise the pixel size is 2 byte */ | |
321 | } | |
322 | } else if (V4L2_PIX_FMT_RGB32 == pix->pixelformat) { | |
323 | ps = 4; | |
324 | } else if (V4L2_PIX_FMT_RGB24 == pix->pixelformat) { | |
325 | ps = 3; | |
326 | } | |
327 | vout->ps = ps; | |
328 | vout->vr_ps = vr_ps; | |
329 | ||
330 | if (is_rotation_enabled(vout)) { | |
331 | line_length = MAX_PIXELS_PER_LINE; | |
332 | ctop = (pix->height - crop->height) - crop->top; | |
333 | cleft = (pix->width - crop->width) - crop->left; | |
334 | } else { | |
335 | line_length = pix->width; | |
336 | } | |
337 | vout->line_length = line_length; | |
338 | switch (rotation) { | |
339 | case dss_rotation_90_degree: | |
340 | offset = vout->vrfb_context[0].yoffset * | |
341 | vout->vrfb_context[0].bytespp; | |
342 | temp_ps = ps / vr_ps; | |
160ac0ba | 343 | if (!mirroring) { |
445e258f AT |
344 | *cropped_offset = offset + line_length * |
345 | temp_ps * cleft + crop->top * temp_ps; | |
346 | } else { | |
347 | *cropped_offset = offset + line_length * temp_ps * | |
348 | cleft + crop->top * temp_ps + (line_length * | |
349 | ((crop->width / (vr_ps)) - 1) * ps); | |
350 | } | |
351 | break; | |
352 | case dss_rotation_180_degree: | |
353 | offset = ((MAX_PIXELS_PER_LINE * vout->vrfb_context[0].yoffset * | |
354 | vout->vrfb_context[0].bytespp) + | |
355 | (vout->vrfb_context[0].xoffset * | |
356 | vout->vrfb_context[0].bytespp)); | |
160ac0ba | 357 | if (!mirroring) { |
445e258f AT |
358 | *cropped_offset = offset + (line_length * ps * ctop) + |
359 | (cleft / vr_ps) * ps; | |
360 | ||
361 | } else { | |
362 | *cropped_offset = offset + (line_length * ps * ctop) + | |
363 | (cleft / vr_ps) * ps + (line_length * | |
364 | (crop->height - 1) * ps); | |
365 | } | |
366 | break; | |
367 | case dss_rotation_270_degree: | |
368 | offset = MAX_PIXELS_PER_LINE * vout->vrfb_context[0].xoffset * | |
369 | vout->vrfb_context[0].bytespp; | |
370 | temp_ps = ps / vr_ps; | |
160ac0ba | 371 | if (!mirroring) { |
445e258f AT |
372 | *cropped_offset = offset + line_length * |
373 | temp_ps * crop->left + ctop * ps; | |
374 | } else { | |
375 | *cropped_offset = offset + line_length * | |
376 | temp_ps * crop->left + ctop * ps + | |
377 | (line_length * ((crop->width / vr_ps) - 1) * | |
378 | ps); | |
379 | } | |
380 | break; | |
381 | case dss_rotation_0_degree: | |
160ac0ba | 382 | if (!mirroring) { |
445e258f AT |
383 | *cropped_offset = (line_length * ps) * |
384 | crop->top + (crop->left / vr_ps) * ps; | |
385 | } else { | |
386 | *cropped_offset = (line_length * ps) * | |
387 | crop->top + (crop->left / vr_ps) * ps + | |
388 | (line_length * (crop->height - 1) * ps); | |
389 | } | |
390 | break; | |
391 | default: | |
392 | *cropped_offset = (line_length * ps * crop->top) / | |
393 | vr_ps + (crop->left * ps) / vr_ps + | |
394 | ((crop->width / vr_ps) - 1) * ps; | |
395 | break; | |
396 | } | |
397 | } |