4 * Copyright (C) 2010 Texas Instruments.
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.
12 #include <linux/sched.h>
13 #include <linux/platform_device.h>
14 #include <linux/videodev2.h>
16 #include <media/videobuf-dma-contig.h>
17 #include <media/v4l2-device.h>
19 #include <linux/omap-dma.h>
20 #include <video/omapvrfb.h>
22 #include "omap_voutdef.h"
23 #include "omap_voutlib.h"
25 #define OMAP_DMA_NO_DEVICE 0
28 * Function for allocating video buffers
30 static int omap_vout_allocate_vrfb_buffers(struct omap_vout_device
*vout
,
31 unsigned int *count
, int startindex
)
35 for (i
= 0; i
< *count
; i
++) {
36 if (!vout
->smsshado_virt_addr
[i
]) {
37 vout
->smsshado_virt_addr
[i
] =
38 omap_vout_alloc_buffer(vout
->smsshado_size
,
39 &vout
->smsshado_phy_addr
[i
]);
41 if (!vout
->smsshado_virt_addr
[i
] && startindex
!= -1) {
42 if (V4L2_MEMORY_MMAP
== vout
->memory
&& i
>= startindex
)
45 if (!vout
->smsshado_virt_addr
[i
]) {
46 for (j
= 0; j
< i
; j
++) {
47 omap_vout_free_buffer(
48 vout
->smsshado_virt_addr
[j
],
50 vout
->smsshado_virt_addr
[j
] = 0;
51 vout
->smsshado_phy_addr
[j
] = 0;
56 memset((void *) vout
->smsshado_virt_addr
[i
], 0,
63 * Wakes up the application once the DMA transfer to VRFB space is completed.
65 static void omap_vout_vrfb_dma_tx_callback(int lch
, u16 ch_status
, void *data
)
67 struct vid_vrfb_dma
*t
= (struct vid_vrfb_dma
*) data
;
70 wake_up_interruptible(&t
->wait
);
76 void omap_vout_free_vrfb_buffers(struct omap_vout_device
*vout
)
80 for (j
= 0; j
< VRFB_NUM_BUFS
; j
++) {
81 omap_vout_free_buffer(vout
->smsshado_virt_addr
[j
],
83 vout
->smsshado_virt_addr
[j
] = 0;
84 vout
->smsshado_phy_addr
[j
] = 0;
88 int omap_vout_setup_vrfb_bufs(struct platform_device
*pdev
, int vid_num
,
89 bool static_vrfb_allocation
)
92 struct omap_vout_device
*vout
;
93 struct video_device
*vfd
;
94 int image_width
, image_height
;
95 int vrfb_num_bufs
= VRFB_NUM_BUFS
;
96 struct v4l2_device
*v4l2_dev
= platform_get_drvdata(pdev
);
97 struct omap2video_device
*vid_dev
=
98 container_of(v4l2_dev
, struct omap2video_device
, v4l2_dev
);
100 vout
= vid_dev
->vouts
[vid_num
];
103 for (i
= 0; i
< VRFB_NUM_BUFS
; i
++) {
104 if (omap_vrfb_request_ctx(&vout
->vrfb_context
[i
])) {
105 dev_info(&pdev
->dev
, ": VRFB allocation failed\n");
106 for (j
= 0; j
< i
; j
++)
107 omap_vrfb_release_ctx(&vout
->vrfb_context
[j
]);
113 /* Calculate VRFB memory size */
114 /* allocate for worst case size */
115 image_width
= VID_MAX_WIDTH
/ TILE_SIZE
;
116 if (VID_MAX_WIDTH
% TILE_SIZE
)
119 image_width
= image_width
* TILE_SIZE
;
120 image_height
= VID_MAX_HEIGHT
/ TILE_SIZE
;
122 if (VID_MAX_HEIGHT
% TILE_SIZE
)
125 image_height
= image_height
* TILE_SIZE
;
126 vout
->smsshado_size
= PAGE_ALIGN(image_width
* image_height
* 2 * 2);
129 * Request and Initialize DMA, for DMA based VRFB transfer
131 vout
->vrfb_dma_tx
.dev_id
= OMAP_DMA_NO_DEVICE
;
132 vout
->vrfb_dma_tx
.dma_ch
= -1;
133 vout
->vrfb_dma_tx
.req_status
= DMA_CHAN_ALLOTED
;
134 ret
= omap_request_dma(vout
->vrfb_dma_tx
.dev_id
, "VRFB DMA TX",
135 omap_vout_vrfb_dma_tx_callback
,
136 (void *) &vout
->vrfb_dma_tx
, &vout
->vrfb_dma_tx
.dma_ch
);
138 vout
->vrfb_dma_tx
.req_status
= DMA_CHAN_NOT_ALLOTED
;
139 dev_info(&pdev
->dev
, ": failed to allocate DMA Channel for"
140 " video%d\n", vfd
->minor
);
142 init_waitqueue_head(&vout
->vrfb_dma_tx
.wait
);
144 /* statically allocated the VRFB buffer is done through
145 commands line aruments */
146 if (static_vrfb_allocation
) {
147 if (omap_vout_allocate_vrfb_buffers(vout
, &vrfb_num_bufs
, -1)) {
149 goto release_vrfb_ctx
;
151 vout
->vrfb_static_allocation
= true;
156 for (j
= 0; j
< VRFB_NUM_BUFS
; j
++)
157 omap_vrfb_release_ctx(&vout
->vrfb_context
[j
]);
159 omap_vout_free_buffers(vout
);
165 * Release the VRFB context once the module exits
167 void omap_vout_release_vrfb(struct omap_vout_device
*vout
)
171 for (i
= 0; i
< VRFB_NUM_BUFS
; i
++)
172 omap_vrfb_release_ctx(&vout
->vrfb_context
[i
]);
174 if (vout
->vrfb_dma_tx
.req_status
== DMA_CHAN_ALLOTED
) {
175 vout
->vrfb_dma_tx
.req_status
= DMA_CHAN_NOT_ALLOTED
;
176 omap_free_dma(vout
->vrfb_dma_tx
.dma_ch
);
181 * Allocate the buffers for the VRFB space. Data is copied from V4L2
182 * buffers to the VRFB buffers using the DMA engine.
184 int omap_vout_vrfb_buffer_setup(struct omap_vout_device
*vout
,
185 unsigned int *count
, unsigned int startindex
)
190 if (!is_rotation_enabled(vout
))
193 /* If rotation is enabled, allocate memory for VRFB space also */
194 *count
= *count
> VRFB_NUM_BUFS
? VRFB_NUM_BUFS
: *count
;
196 /* Allocate the VRFB buffers only if the buffers are not
197 * allocated during init time.
199 if (!vout
->vrfb_static_allocation
)
200 if (omap_vout_allocate_vrfb_buffers(vout
, count
, startindex
))
203 if (vout
->dss_mode
== OMAP_DSS_COLOR_YUV2
||
204 vout
->dss_mode
== OMAP_DSS_COLOR_UYVY
)
209 for (i
= 0; i
< *count
; i
++)
210 omap_vrfb_setup(&vout
->vrfb_context
[i
],
211 vout
->smsshado_phy_addr
[i
], vout
->pix
.width
,
212 vout
->pix
.height
, vout
->bpp
, yuv_mode
);
217 int omap_vout_prepare_vrfb(struct omap_vout_device
*vout
,
218 struct videobuf_buffer
*vb
)
221 struct vid_vrfb_dma
*tx
;
222 enum dss_rotation rotation
;
223 u32 dest_frame_index
= 0, src_element_index
= 0;
224 u32 dest_element_index
= 0, src_frame_index
= 0;
225 u32 elem_count
= 0, frame_count
= 0, pixsize
= 2;
227 if (!is_rotation_enabled(vout
))
230 dmabuf
= vout
->buf_phy_addr
[vb
->i
];
231 /* If rotation is enabled, copy input buffer into VRFB
232 * memory space using DMA. We are copying input buffer
233 * into VRFB memory space of desired angle and DSS will
234 * read image VRFB memory for 0 degree angle
236 pixsize
= vout
->bpp
* vout
->vrfb_bpp
;
238 * DMA transfer in double index mode
242 dest_frame_index
= ((MAX_PIXELS_PER_LINE
* pixsize
) -
243 (vout
->pix
.width
* vout
->bpp
)) + 1;
245 /* Source and destination parameters */
246 src_element_index
= 0;
248 dest_element_index
= 1;
249 /* Number of elements per frame */
250 elem_count
= vout
->pix
.width
* vout
->bpp
;
251 frame_count
= vout
->pix
.height
;
252 tx
= &vout
->vrfb_dma_tx
;
254 omap_set_dma_transfer_params(tx
->dma_ch
, OMAP_DMA_DATA_TYPE_S32
,
255 (elem_count
/ 4), frame_count
, OMAP_DMA_SYNC_ELEMENT
,
257 /* src_port required only for OMAP1 */
258 omap_set_dma_src_params(tx
->dma_ch
, 0, OMAP_DMA_AMODE_POST_INC
,
259 dmabuf
, src_element_index
, src_frame_index
);
260 /*set dma source burst mode for VRFB */
261 omap_set_dma_src_burst_mode(tx
->dma_ch
, OMAP_DMA_DATA_BURST_16
);
262 rotation
= calc_rotation(vout
);
264 /* dest_port required only for OMAP1 */
265 omap_set_dma_dest_params(tx
->dma_ch
, 0, OMAP_DMA_AMODE_DOUBLE_IDX
,
266 vout
->vrfb_context
[vb
->i
].paddr
[0], dest_element_index
,
268 /*set dma dest burst mode for VRFB */
269 omap_set_dma_dest_burst_mode(tx
->dma_ch
, OMAP_DMA_DATA_BURST_16
);
270 omap_dma_set_global_params(DMA_DEFAULT_ARB_RATE
, 0x20, 0);
272 omap_start_dma(tx
->dma_ch
);
273 wait_event_interruptible_timeout(tx
->wait
, tx
->tx_status
== 1,
276 if (tx
->tx_status
== 0) {
277 omap_stop_dma(tx
->dma_ch
);
280 /* Store buffers physical address into an array. Addresses
281 * from this array will be used to configure DSS */
282 vout
->queued_buf_addr
[vb
->i
] = (u8
*)
283 vout
->vrfb_context
[vb
->i
].paddr
[rotation
];
288 * Calculate the buffer offsets from which the streaming should
289 * start. This offset calculation is mainly required because of
290 * the VRFB 32 pixels alignment with rotation.
292 void omap_vout_calculate_vrfb_offset(struct omap_vout_device
*vout
)
294 enum dss_rotation rotation
;
295 bool mirroring
= vout
->mirror
;
296 struct v4l2_rect
*crop
= &vout
->crop
;
297 struct v4l2_pix_format
*pix
= &vout
->pix
;
298 int *cropped_offset
= &vout
->cropped_offset
;
299 int vr_ps
= 1, ps
= 2, temp_ps
= 2;
300 int offset
= 0, ctop
= 0, cleft
= 0, line_length
= 0;
302 rotation
= calc_rotation(vout
);
304 if (V4L2_PIX_FMT_YUYV
== pix
->pixelformat
||
305 V4L2_PIX_FMT_UYVY
== pix
->pixelformat
) {
306 if (is_rotation_enabled(vout
)) {
308 * ps - Actual pixel size for YUYV/UYVY for
309 * VRFB/Mirroring is 4 bytes
310 * vr_ps - Virtually pixel size for YUYV/UYVY is
316 ps
= 2; /* otherwise the pixel size is 2 byte */
318 } else if (V4L2_PIX_FMT_RGB32
== pix
->pixelformat
) {
320 } else if (V4L2_PIX_FMT_RGB24
== pix
->pixelformat
) {
326 if (is_rotation_enabled(vout
)) {
327 line_length
= MAX_PIXELS_PER_LINE
;
328 ctop
= (pix
->height
- crop
->height
) - crop
->top
;
329 cleft
= (pix
->width
- crop
->width
) - crop
->left
;
331 line_length
= pix
->width
;
333 vout
->line_length
= line_length
;
335 case dss_rotation_90_degree
:
336 offset
= vout
->vrfb_context
[0].yoffset
*
337 vout
->vrfb_context
[0].bytespp
;
338 temp_ps
= ps
/ vr_ps
;
340 *cropped_offset
= offset
+ line_length
*
341 temp_ps
* cleft
+ crop
->top
* temp_ps
;
343 *cropped_offset
= offset
+ line_length
* temp_ps
*
344 cleft
+ crop
->top
* temp_ps
+ (line_length
*
345 ((crop
->width
/ (vr_ps
)) - 1) * ps
);
348 case dss_rotation_180_degree
:
349 offset
= ((MAX_PIXELS_PER_LINE
* vout
->vrfb_context
[0].yoffset
*
350 vout
->vrfb_context
[0].bytespp
) +
351 (vout
->vrfb_context
[0].xoffset
*
352 vout
->vrfb_context
[0].bytespp
));
354 *cropped_offset
= offset
+ (line_length
* ps
* ctop
) +
355 (cleft
/ vr_ps
) * ps
;
358 *cropped_offset
= offset
+ (line_length
* ps
* ctop
) +
359 (cleft
/ vr_ps
) * ps
+ (line_length
*
360 (crop
->height
- 1) * ps
);
363 case dss_rotation_270_degree
:
364 offset
= MAX_PIXELS_PER_LINE
* vout
->vrfb_context
[0].xoffset
*
365 vout
->vrfb_context
[0].bytespp
;
366 temp_ps
= ps
/ vr_ps
;
368 *cropped_offset
= offset
+ line_length
*
369 temp_ps
* crop
->left
+ ctop
* ps
;
371 *cropped_offset
= offset
+ line_length
*
372 temp_ps
* crop
->left
+ ctop
* ps
+
373 (line_length
* ((crop
->width
/ vr_ps
) - 1) *
377 case dss_rotation_0_degree
:
379 *cropped_offset
= (line_length
* ps
) *
380 crop
->top
+ (crop
->left
/ vr_ps
) * ps
;
382 *cropped_offset
= (line_length
* ps
) *
383 crop
->top
+ (crop
->left
/ vr_ps
) * ps
+
384 (line_length
* (crop
->height
- 1) * ps
);
388 *cropped_offset
= (line_length
* ps
* crop
->top
) /
389 vr_ps
+ (crop
->left
* ps
) / vr_ps
+
390 ((crop
->width
/ vr_ps
) - 1) * ps
;