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