summaryrefslogtreecommitdiff
path: root/drivers/media/platform/vivid/vivid-osd.c
blob: bdc380b14e0c47e73461ded4b16d01cbf484ed2d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
/*
 * vivid-osd.c - osd support for testing overlays.
 *
 * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
 *
 * This program is free software; you may redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/font.h>
#include <linux/mutex.h>
#include <linux/videodev2.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/fb.h>
#include <media/videobuf2-vmalloc.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>
#include <media/v4l2-common.h>

#include "vivid-core.h"
#include "vivid-osd.h"

#define MAX_OSD_WIDTH  720
#define MAX_OSD_HEIGHT 576

/*
 * Order: white, yellow, cyan, green, magenta, red, blue, black,
 * and same again with the alpha bit set (if any)
 */
static const u16 rgb555[16] = {
	0x7fff, 0x7fe0, 0x03ff, 0x03e0, 0x7c1f, 0x7c00, 0x001f, 0x0000,
	0xffff, 0xffe0, 0x83ff, 0x83e0, 0xfc1f, 0xfc00, 0x801f, 0x8000
};

static const u16 rgb565[16] = {
	0xffff, 0xffe0, 0x07ff, 0x07e0, 0xf81f, 0xf800, 0x001f, 0x0000,
	0xffff, 0xffe0, 0x07ff, 0x07e0, 0xf81f, 0xf800, 0x001f, 0x0000
};

void vivid_clear_fb(struct vivid_dev *dev)
{
	void *p = dev->video_vbase;
	const u16 *rgb = rgb555;
	unsigned x, y;

	if (dev->fb_defined.green.length == 6)
		rgb = rgb565;

	for (y = 0; y < dev->display_height; y++) {
		u16 *d = p;

		for (x = 0; x < dev->display_width; x++)
			d[x] = rgb[(y / 16 + x / 16) % 16];
		p += dev->display_byte_stride;
	}
}

/* --------------------------------------------------------------------- */

static int vivid_fb_ioctl(struct fb_info *info, unsigned cmd, unsigned long arg)
{
	struct vivid_dev *dev = (struct vivid_dev *)info->par;

	switch (cmd) {
	case FBIOGET_VBLANK: {
		struct fb_vblank vblank;

		memset(&vblank, 0, sizeof(vblank));
		vblank.flags = FB_VBLANK_HAVE_COUNT | FB_VBLANK_HAVE_VCOUNT |
			FB_VBLANK_HAVE_VSYNC;
		vblank.count = 0;
		vblank.vcount = 0;
		vblank.hcount = 0;
		if (copy_to_user((void __user *)arg, &vblank, sizeof(vblank)))
			return -EFAULT;
		return 0;
	}

	default:
		dprintk(dev, 1, "Unknown ioctl %08x\n", cmd);
		return -EINVAL;
	}
	return 0;
}

/* Framebuffer device handling */

static int vivid_fb_set_var(struct vivid_dev *dev, struct fb_var_screeninfo *var)
{
	dprintk(dev, 1, "vivid_fb_set_var\n");

	if (var->bits_per_pixel != 16) {
		dprintk(dev, 1, "vivid_fb_set_var - Invalid bpp\n");
		return -EINVAL;
	}
	dev->display_byte_stride = var->xres * dev->bytes_per_pixel;

	return 0;
}

static int vivid_fb_get_fix(struct vivid_dev *dev, struct fb_fix_screeninfo *fix)
{
	dprintk(dev, 1, "vivid_fb_get_fix\n");
	memset(fix, 0, sizeof(struct fb_fix_screeninfo));
	strlcpy(fix->id, "vioverlay fb", sizeof(fix->id));
	fix->smem_start = dev->video_pbase;
	fix->smem_len = dev->video_buffer_size;
	fix->type = FB_TYPE_PACKED_PIXELS;
	fix->visual = FB_VISUAL_TRUECOLOR;
	fix->xpanstep = 1;
	fix->ypanstep = 1;
	fix->ywrapstep = 0;
	fix->line_length = dev->display_byte_stride;
	fix->accel = FB_ACCEL_NONE;
	return 0;
}

/* Check the requested display mode, returning -EINVAL if we can't
   handle it. */

static int _vivid_fb_check_var(struct fb_var_screeninfo *var, struct vivid_dev *dev)
{
	dprintk(dev, 1, "vivid_fb_check_var\n");

	var->bits_per_pixel = 16;
	if (var->green.length == 5) {
		var->red.offset = 10;
		var->red.length = 5;
		var->green.offset = 5;
		var->green.length = 5;
		var->blue.offset = 0;
		var->blue.length = 5;
		var->transp.offset = 15;
		var->transp.length = 1;
	} else {
		var->red.offset = 11;
		var->red.length = 5;
		var->green.offset = 5;
		var->green.length = 6;
		var->blue.offset = 0;
		var->blue.length = 5;
		var->transp.offset = 0;
		var->transp.length = 0;
	}
	var->xoffset = var->yoffset = 0;
	var->left_margin = var->upper_margin = 0;
	var->nonstd = 0;

	var->vmode &= ~FB_VMODE_MASK;
	var->vmode = FB_VMODE_NONINTERLACED;

	/* Dummy values */
	var->hsync_len = 24;
	var->vsync_len = 2;
	var->pixclock = 84316;
	var->right_margin = 776;
	var->lower_margin = 591;
	return 0;
}

static int vivid_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
	struct vivid_dev *dev = (struct vivid_dev *) info->par;

	dprintk(dev, 1, "vivid_fb_check_var\n");
	return _vivid_fb_check_var(var, dev);
}

static int vivid_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{
	return 0;
}

static int vivid_fb_set_par(struct fb_info *info)
{
	int rc = 0;
	struct vivid_dev *dev = (struct vivid_dev *) info->par;

	dprintk(dev, 1, "vivid_fb_set_par\n");

	rc = vivid_fb_set_var(dev, &info->var);
	vivid_fb_get_fix(dev, &info->fix);
	return rc;
}

static int vivid_fb_setcolreg(unsigned regno, unsigned red, unsigned green,
				unsigned blue, unsigned transp,
				struct fb_info *info)
{
	u32 color, *palette;

	if (regno >= info->cmap.len)
		return -EINVAL;

	color = ((transp & 0xFF00) << 16) | ((red & 0xFF00) << 8) |
		 (green & 0xFF00) | ((blue & 0xFF00) >> 8);
	if (regno >= 16)
		return -EINVAL;

	palette = info->pseudo_palette;
	if (info->var.bits_per_pixel == 16) {
		switch (info->var.green.length) {
		case 6:
			color = (red & 0xf800) |
				((green & 0xfc00) >> 5) |
				((blue & 0xf800) >> 11);
			break;
		case 5:
			color = ((red & 0xf800) >> 1) |
				((green & 0xf800) >> 6) |
				((blue & 0xf800) >> 11) |
				(transp ? 0x8000 : 0);
			break;
		}
	}
	palette[regno] = color;
	return 0;
}

/* We don't really support blanking. All this does is enable or
   disable the OSD. */
static int vivid_fb_blank(int blank_mode, struct fb_info *info)
{
	struct vivid_dev *dev = (struct vivid_dev *)info->par;

	dprintk(dev, 1, "Set blanking mode : %d\n", blank_mode);
	switch (blank_mode) {
	case FB_BLANK_UNBLANK:
		break;
	case FB_BLANK_NORMAL:
	case FB_BLANK_HSYNC_SUSPEND:
	case FB_BLANK_VSYNC_SUSPEND:
	case FB_BLANK_POWERDOWN:
		break;
	}
	return 0;
}

static struct fb_ops vivid_fb_ops = {
	.owner = THIS_MODULE,
	.fb_check_var   = vivid_fb_check_var,
	.fb_set_par     = vivid_fb_set_par,
	.fb_setcolreg   = vivid_fb_setcolreg,
	.fb_fillrect    = cfb_fillrect,
	.fb_copyarea    = cfb_copyarea,
	.fb_imageblit   = cfb_imageblit,
	.fb_cursor      = NULL,
	.fb_ioctl       = vivid_fb_ioctl,
	.fb_pan_display = vivid_fb_pan_display,
	.fb_blank       = vivid_fb_blank,
};

/* Initialization */


/* Setup our initial video mode */
static int vivid_fb_init_vidmode(struct vivid_dev *dev)
{
	struct v4l2_rect start_window;

	/* Color mode */

	dev->bits_per_pixel = 16;
	dev->bytes_per_pixel = dev->bits_per_pixel / 8;

	start_window.width = MAX_OSD_WIDTH;
	start_window.left = 0;

	dev->display_byte_stride = start_window.width * dev->bytes_per_pixel;

	/* Vertical size & position */

	start_window.height = MAX_OSD_HEIGHT;
	start_window.top = 0;

	dev->display_width = start_window.width;
	dev->display_height = start_window.height;

	/* Generate a valid fb_var_screeninfo */

	dev->fb_defined.xres = dev->display_width;
	dev->fb_defined.yres = dev->display_height;
	dev->fb_defined.xres_virtual = dev->display_width;
	dev->fb_defined.yres_virtual = dev->display_height;
	dev->fb_defined.bits_per_pixel = dev->bits_per_pixel;
	dev->fb_defined.vmode = FB_VMODE_NONINTERLACED;
	dev->fb_defined.left_margin = start_window.left + 1;
	dev->fb_defined.upper_margin = start_window.top + 1;
	dev->fb_defined.accel_flags = FB_ACCEL_NONE;
	dev->fb_defined.nonstd = 0;
	/* set default to 1:5:5:5 */
	dev->fb_defined.green.length = 5;

	/* We've filled in the most data, let the usual mode check
	   routine fill in the rest. */
	_vivid_fb_check_var(&dev->fb_defined, dev);

	/* Generate valid fb_fix_screeninfo */

	vivid_fb_get_fix(dev, &dev->fb_fix);

	/* Generate valid fb_info */

	dev->fb_info.node = -1;
	dev->fb_info.flags = FBINFO_FLAG_DEFAULT;
	dev->fb_info.fbops = &vivid_fb_ops;
	dev->fb_info.par = dev;
	dev->fb_info.var = dev->fb_defined;
	dev->fb_info.fix = dev->fb_fix;
	dev->fb_info.screen_base = (u8 __iomem *)dev->video_vbase;
	dev->fb_info.fbops = &vivid_fb_ops;

	/* Supply some monitor specs. Bogus values will do for now */
	dev->fb_info.monspecs.hfmin = 8000;
	dev->fb_info.monspecs.hfmax = 70000;
	dev->fb_info.monspecs.vfmin = 10;
	dev->fb_info.monspecs.vfmax = 100;

	/* Allocate color map */
	if (fb_alloc_cmap(&dev->fb_info.cmap, 256, 1)) {
		pr_err("abort, unable to alloc cmap\n");
		return -ENOMEM;
	}

	/* Allocate the pseudo palette */
	dev->fb_info.pseudo_palette = kmalloc_array(16, sizeof(u32), GFP_KERNEL);

	return dev->fb_info.pseudo_palette ? 0 : -ENOMEM;
}

/* Release any memory we've grabbed */
void vivid_fb_release_buffers(struct vivid_dev *dev)
{
	if (dev->video_vbase == NULL)
		return;

	/* Release cmap */
	if (dev->fb_info.cmap.len)
		fb_dealloc_cmap(&dev->fb_info.cmap);

	/* Release pseudo palette */
	kfree(dev->fb_info.pseudo_palette);
	kfree(dev->video_vbase);
}

/* Initialize the specified card */

int vivid_fb_init(struct vivid_dev *dev)
{
	int ret;

	dev->video_buffer_size = MAX_OSD_HEIGHT * MAX_OSD_WIDTH * 2;
	dev->video_vbase = kzalloc(dev->video_buffer_size, GFP_KERNEL | GFP_DMA32);
	if (dev->video_vbase == NULL)
		return -ENOMEM;
	dev->video_pbase = virt_to_phys(dev->video_vbase);

	pr_info("Framebuffer at 0x%lx, mapped to 0x%p, size %dk\n",
			dev->video_pbase, dev->video_vbase,
			dev->video_buffer_size / 1024);

	/* Set the startup video mode information */
	ret = vivid_fb_init_vidmode(dev);
	if (ret) {
		vivid_fb_release_buffers(dev);
		return ret;
	}

	vivid_clear_fb(dev);

	/* Register the framebuffer */
	if (register_framebuffer(&dev->fb_info) < 0) {
		vivid_fb_release_buffers(dev);
		return -EINVAL;
	}

	/* Set the card to the requested mode */
	vivid_fb_set_par(&dev->fb_info);
	return 0;

}