[mirror_ubuntu-artful-kernel.git] / drivers / media / video / omap / omap_vout_vrfb.c

/*
 * omap_vout_vrfb.c
 *
 * Copyright (C) 2010 Texas Instruments.
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2. This program is licensed "as is" without any warranty of any
 * kind, whether express or implied.
 *
 */

#include <linux/sched.h>
#include <linux/platform_device.h>
#include <linux/videodev2.h>

#include <media/videobuf-dma-contig.h>
#include <media/v4l2-device.h>

#include <plat/dma.h>
#include <plat/vrfb.h>

#include "omap_voutdef.h"
#include "omap_voutlib.h"

/*
 * Function for allocating video buffers
 */
static int omap_vout_allocate_vrfb_buffers(struct omap_vout_device *vout,
		unsigned int *count, int startindex)
{
	int i, j;

	for (i = 0; i < *count; i++) {
		if (!vout->smsshado_virt_addr[i]) {
			vout->smsshado_virt_addr[i] =
				omap_vout_alloc_buffer(vout->smsshado_size,
						&vout->smsshado_phy_addr[i]);
		}
		if (!vout->smsshado_virt_addr[i] && startindex != -1) {
			if (V4L2_MEMORY_MMAP == vout->memory && i >= startindex)
				break;
		}
		if (!vout->smsshado_virt_addr[i]) {
			for (j = 0; j < i; j++) {
				omap_vout_free_buffer(
						vout->smsshado_virt_addr[j],
						vout->smsshado_size);
				vout->smsshado_virt_addr[j] = 0;
				vout->smsshado_phy_addr[j] = 0;
			}
			*count = 0;
			return -ENOMEM;
		}
		memset((void *) vout->smsshado_virt_addr[i], 0,
				vout->smsshado_size);
	}
	return 0;
}

/*
 * Wakes up the application once the DMA transfer to VRFB space is completed.
 */
static void omap_vout_vrfb_dma_tx_callback(int lch, u16 ch_status, void *data)
{
	struct vid_vrfb_dma *t = (struct vid_vrfb_dma *) data;

	t->tx_status = 1;
	wake_up_interruptible(&t->wait);
}

/*
 * Free VRFB buffers
 */
void omap_vout_free_vrfb_buffers(struct omap_vout_device *vout)
{
	int j;

	for (j = 0; j < VRFB_NUM_BUFS; j++) {
		omap_vout_free_buffer(vout->smsshado_virt_addr[j],
				vout->smsshado_size);
		vout->smsshado_virt_addr[j] = 0;
		vout->smsshado_phy_addr[j] = 0;
	}
}

int omap_vout_setup_vrfb_bufs(struct platform_device *pdev, int vid_num,
			u32 static_vrfb_allocation)
{
	int ret = 0, i, j;
	struct omap_vout_device *vout;
	struct video_device *vfd;
	int image_width, image_height;
	int vrfb_num_bufs = VRFB_NUM_BUFS;
	struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
	struct omap2video_device *vid_dev =
		container_of(v4l2_dev, struct omap2video_device, v4l2_dev);

	vout = vid_dev->vouts[vid_num];
	vfd = vout->vfd;

	for (i = 0; i < VRFB_NUM_BUFS; i++) {
		if (omap_vrfb_request_ctx(&vout->vrfb_context[i])) {
			dev_info(&pdev->dev, ": VRFB allocation failed\n");
			for (j = 0; j < i; j++)
				omap_vrfb_release_ctx(&vout->vrfb_context[j]);
			ret = -ENOMEM;
			goto free_buffers;
		}
	}

	/* Calculate VRFB memory size */
	/* allocate for worst case size */
	image_width = VID_MAX_WIDTH / TILE_SIZE;
	if (VID_MAX_WIDTH % TILE_SIZE)
		image_width++;

	image_width = image_width * TILE_SIZE;
	image_height = VID_MAX_HEIGHT / TILE_SIZE;

	if (VID_MAX_HEIGHT % TILE_SIZE)
		image_height++;

	image_height = image_height * TILE_SIZE;
	vout->smsshado_size = PAGE_ALIGN(image_width * image_height * 2 * 2);

	/*
	 * Request and Initialize DMA, for DMA based VRFB transfer
	 */
	vout->vrfb_dma_tx.dev_id = OMAP_DMA_NO_DEVICE;
	vout->vrfb_dma_tx.dma_ch = -1;
	vout->vrfb_dma_tx.req_status = DMA_CHAN_ALLOTED;
	ret = omap_request_dma(vout->vrfb_dma_tx.dev_id, "VRFB DMA TX",
			omap_vout_vrfb_dma_tx_callback,
			(void *) &vout->vrfb_dma_tx, &vout->vrfb_dma_tx.dma_ch);
	if (ret < 0) {
		vout->vrfb_dma_tx.req_status = DMA_CHAN_NOT_ALLOTED;
		dev_info(&pdev->dev, ": failed to allocate DMA Channel for"
				" video%d\n", vfd->minor);
	}
	init_waitqueue_head(&vout->vrfb_dma_tx.wait);

	/* statically allocated the VRFB buffer is done through
	   commands line aruments */
	if (static_vrfb_allocation) {
		if (omap_vout_allocate_vrfb_buffers(vout, &vrfb_num_bufs, -1)) {
			ret =  -ENOMEM;
			goto release_vrfb_ctx;
		}
		vout->vrfb_static_allocation = 1;
	}
	return 0;

release_vrfb_ctx:
	for (j = 0; j < VRFB_NUM_BUFS; j++)
		omap_vrfb_release_ctx(&vout->vrfb_context[j]);
free_buffers:
	omap_vout_free_buffers(vout);

	return ret;
}

/*
 * Release the VRFB context once the module exits
 */
void omap_vout_release_vrfb(struct omap_vout_device *vout)
{
	int i;

	for (i = 0; i < VRFB_NUM_BUFS; i++)
		omap_vrfb_release_ctx(&vout->vrfb_context[i]);

	if (vout->vrfb_dma_tx.req_status == DMA_CHAN_ALLOTED) {
		vout->vrfb_dma_tx.req_status = DMA_CHAN_NOT_ALLOTED;
		omap_free_dma(vout->vrfb_dma_tx.dma_ch);
	}
}

/*
 * Allocate the buffers for the VRFB space.  Data is copied from V4L2
 * buffers to the VRFB buffers using the DMA engine.
 */
int omap_vout_vrfb_buffer_setup(struct omap_vout_device *vout,
			  unsigned int *count, unsigned int startindex)
{
	int i;
	bool yuv_mode;

	if (!is_rotation_enabled(vout))
		return 0;

	/* If rotation is enabled, allocate memory for VRFB space also */
	*count = *count > VRFB_NUM_BUFS ? VRFB_NUM_BUFS : *count;

	/* Allocate the VRFB buffers only if the buffers are not
	 * allocated during init time.
	 */
	if (!vout->vrfb_static_allocation)
		if (omap_vout_allocate_vrfb_buffers(vout, count, startindex))
			return -ENOMEM;

	if (vout->dss_mode == OMAP_DSS_COLOR_YUV2 ||
			vout->dss_mode == OMAP_DSS_COLOR_UYVY)
		yuv_mode = true;
	else
		yuv_mode = false;

	for (i = 0; i < *count; i++)
		omap_vrfb_setup(&vout->vrfb_context[i],
				vout->smsshado_phy_addr[i], vout->pix.width,
				vout->pix.height, vout->bpp, yuv_mode);

	return 0;
}

int omap_vout_prepare_vrfb(struct omap_vout_device *vout,
				struct videobuf_buffer *vb)
{
	dma_addr_t dmabuf;
	struct vid_vrfb_dma *tx;
	enum dss_rotation rotation;
	u32 dest_frame_index = 0, src_element_index = 0;
	u32 dest_element_index = 0, src_frame_index = 0;
	u32 elem_count = 0, frame_count = 0, pixsize = 2;

	if (!is_rotation_enabled(vout))
		return 0;

	dmabuf = vout->buf_phy_addr[vb->i];
	/* If rotation is enabled, copy input buffer into VRFB
	 * memory space using DMA. We are copying input buffer
	 * into VRFB memory space of desired angle and DSS will
	 * read image VRFB memory for 0 degree angle
	 */
	pixsize = vout->bpp * vout->vrfb_bpp;
	/*
	 * DMA transfer in double index mode
	 */

	/* Frame index */
	dest_frame_index = ((MAX_PIXELS_PER_LINE * pixsize) -
			(vout->pix.width * vout->bpp)) + 1;

	/* Source and destination parameters */
	src_element_index = 0;
	src_frame_index = 0;
	dest_element_index = 1;
	/* Number of elements per frame */
	elem_count = vout->pix.width * vout->bpp;
	frame_count = vout->pix.height;
	tx = &vout->vrfb_dma_tx;
	tx->tx_status = 0;
	omap_set_dma_transfer_params(tx->dma_ch, OMAP_DMA_DATA_TYPE_S32,
			(elem_count / 4), frame_count, OMAP_DMA_SYNC_ELEMENT,
			tx->dev_id, 0x0);
	/* src_port required only for OMAP1 */
	omap_set_dma_src_params(tx->dma_ch, 0, OMAP_DMA_AMODE_POST_INC,
			dmabuf, src_element_index, src_frame_index);
	/*set dma source burst mode for VRFB */
	omap_set_dma_src_burst_mode(tx->dma_ch, OMAP_DMA_DATA_BURST_16);
	rotation = calc_rotation(vout);

	/* dest_port required only for OMAP1 */
	omap_set_dma_dest_params(tx->dma_ch, 0, OMAP_DMA_AMODE_DOUBLE_IDX,
			vout->vrfb_context[vb->i].paddr[0], dest_element_index,
			dest_frame_index);
	/*set dma dest burst mode for VRFB */
	omap_set_dma_dest_burst_mode(tx->dma_ch, OMAP_DMA_DATA_BURST_16);
	omap_dma_set_global_params(DMA_DEFAULT_ARB_RATE, 0x20, 0);

	omap_start_dma(tx->dma_ch);
	interruptible_sleep_on_timeout(&tx->wait, VRFB_TX_TIMEOUT);

	if (tx->tx_status == 0) {
		omap_stop_dma(tx->dma_ch);
		return -EINVAL;
	}
	/* Store buffers physical address into an array. Addresses
	 * from this array will be used to configure DSS */
	vout->queued_buf_addr[vb->i] = (u8 *)
		vout->vrfb_context[vb->i].paddr[rotation];
	return 0;
}

/*
 * Calculate the buffer offsets from which the streaming should
 * start. This offset calculation is mainly required because of
 * the VRFB 32 pixels alignment with rotation.
 */
void omap_vout_calculate_vrfb_offset(struct omap_vout_device *vout)
{
	enum dss_rotation rotation;
	bool mirroring = vout->mirror;
	struct v4l2_rect *crop = &vout->crop;
	struct v4l2_pix_format *pix = &vout->pix;
	int *cropped_offset = &vout->cropped_offset;
	int vr_ps = 1, ps = 2, temp_ps = 2;
	int offset = 0, ctop = 0, cleft = 0, line_length = 0;

	rotation = calc_rotation(vout);

	if (V4L2_PIX_FMT_YUYV == pix->pixelformat ||
			V4L2_PIX_FMT_UYVY == pix->pixelformat) {
		if (is_rotation_enabled(vout)) {
			/*
			 * ps    - Actual pixel size for YUYV/UYVY for
			 *         VRFB/Mirroring is 4 bytes
			 * vr_ps - Virtually pixel size for YUYV/UYVY is
			 *         2 bytes
			 */
			ps = 4;
			vr_ps = 2;
		} else {
			ps = 2;	/* otherwise the pixel size is 2 byte */
		}
	} else if (V4L2_PIX_FMT_RGB32 == pix->pixelformat) {
		ps = 4;
	} else if (V4L2_PIX_FMT_RGB24 == pix->pixelformat) {
		ps = 3;
	}
	vout->ps = ps;
	vout->vr_ps = vr_ps;

	if (is_rotation_enabled(vout)) {
		line_length = MAX_PIXELS_PER_LINE;
		ctop = (pix->height - crop->height) - crop->top;
		cleft = (pix->width - crop->width) - crop->left;
	} else {
		line_length = pix->width;
	}
	vout->line_length = line_length;
	switch (rotation) {
	case dss_rotation_90_degree:
		offset = vout->vrfb_context[0].yoffset *
			vout->vrfb_context[0].bytespp;
		temp_ps = ps / vr_ps;
		if (mirroring == 0) {
			*cropped_offset = offset + line_length *
				temp_ps * cleft + crop->top * temp_ps;
		} else {
			*cropped_offset = offset + line_length * temp_ps *
				cleft + crop->top * temp_ps + (line_length *
				((crop->width / (vr_ps)) - 1) * ps);
		}
		break;
	case dss_rotation_180_degree:
		offset = ((MAX_PIXELS_PER_LINE * vout->vrfb_context[0].yoffset *
			vout->vrfb_context[0].bytespp) +
			(vout->vrfb_context[0].xoffset *
			vout->vrfb_context[0].bytespp));
		if (mirroring == 0) {
			*cropped_offset = offset + (line_length * ps * ctop) +
				(cleft / vr_ps) * ps;

		} else {
			*cropped_offset = offset + (line_length * ps * ctop) +
				(cleft / vr_ps) * ps + (line_length *
				(crop->height - 1) * ps);
		}
		break;
	case dss_rotation_270_degree:
		offset = MAX_PIXELS_PER_LINE * vout->vrfb_context[0].xoffset *
			vout->vrfb_context[0].bytespp;
		temp_ps = ps / vr_ps;
		if (mirroring == 0) {
			*cropped_offset = offset + line_length *
			    temp_ps * crop->left + ctop * ps;
		} else {
			*cropped_offset = offset + line_length *
				temp_ps * crop->left + ctop * ps +
				(line_length * ((crop->width / vr_ps) - 1) *
				 ps);
		}
		break;
	case dss_rotation_0_degree:
		if (mirroring == 0) {
			*cropped_offset = (line_length * ps) *
				crop->top + (crop->left / vr_ps) * ps;
		} else {
			*cropped_offset = (line_length * ps) *
				crop->top + (crop->left / vr_ps) * ps +
				(line_length * (crop->height - 1) * ps);
		}
		break;
	default:
		*cropped_offset = (line_length * ps * crop->top) /
			vr_ps + (crop->left * ps) / vr_ps +
			((crop->width / vr_ps) - 1) * ps;
		break;
	}
}
Commit	Line	Data
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,
87	u32 static_vrfb_allocation)
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	}