summaryrefslogtreecommitdiffstats
path: root/firmware/target/arm/imx233/creative-zenxfi3/lcd-zenxfi3.c
blob: 17fab032bfcd3396445b9a7f98fb22b500ff5542 (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
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (c) 2012 by Amaury Pouly
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
#include <sys/types.h> /* off_t */
#include <string.h>
#include "cpu.h"
#include "system.h"
#include "backlight-target.h"
#include "lcd.h"
#include "lcdif-imx233.h"
#include "clkctrl-imx233.h"
#include "pinctrl-imx233.h"
#include "logf.h"

#ifdef HAVE_LCD_ENABLE
static bool lcd_on;
#endif
static unsigned lcd_yuv_options = 0;

static void setup_parameters(void)
{
    imx233_lcdif_reset();
    imx233_lcdif_set_lcd_databus_width(HW_LCDIF_CTRL__LCD_DATABUS_WIDTH_16_BIT);
    imx233_lcdif_set_word_length(HW_LCDIF_CTRL__WORD_LENGTH_16_BIT);
    imx233_lcdif_set_timings(2, 2, 3, 3);
    imx233_lcdif_enable_underflow_recover(true);
}

static void setup_lcd_pins(bool use_lcdif)
{
    /* WARNING
     * the B1P22 pins is used to gate the speaker! Do NOT drive
     * them as lcd_dotclk and lcd_hsync or it will break audio */
    imx233_pinctrl_acquire_pin(1, 18, "lcd reset");
    imx233_pinctrl_acquire_pin(1, 19, "lcd rs");
    imx233_pinctrl_acquire_pin(1, 20, "lcd wr");
    imx233_pinctrl_acquire_pin(1, 21, "lcd cs");
    imx233_pinctrl_acquire_pin(1, 23, "lcd enable");
    imx233_pinctrl_acquire_pin(1, 25, "lcd vsync");
    imx233_pinctrl_acquire_pin_mask(1, 0x3ffff, "lcd data");
    if(use_lcdif)
    {
        imx233_set_pin_function(1, 25, PINCTRL_FUNCTION_MAIN); /* lcd_vsync */
        imx233_set_pin_function(1, 21, PINCTRL_FUNCTION_MAIN); /* lcd_cs */
        imx233_set_pin_function(1, 23, PINCTRL_FUNCTION_MAIN); /* lcd_enable */
        imx233_set_pin_function(1, 18, PINCTRL_FUNCTION_MAIN); /* lcd_reset */
        imx233_set_pin_function(1, 19, PINCTRL_FUNCTION_MAIN); /* lcd_rs */
        imx233_set_pin_function(1, 16, PINCTRL_FUNCTION_MAIN); /* lcd_d16 */
        imx233_set_pin_function(1, 17, PINCTRL_FUNCTION_MAIN); /* lcd_d17 */
        imx233_set_pin_function(1, 20, PINCTRL_FUNCTION_MAIN); /* lcd_wr */
        __REG_CLR(HW_PINCTRL_MUXSEL(2)) = 0xffffffff; /* lcd_d{0-15} */
    }
    else
    {
        __REG_SET(HW_PINCTRL_MUXSEL(2)) = 0xffffffff; /* lcd_d{0-15} */
        imx233_enable_gpio_output_mask(1, 0x2bfffff, false); /* lcd_{d{0-17},reset,rs,wr,cs,enable,vsync} */
        imx233_set_pin_function(1, 16, PINCTRL_FUNCTION_GPIO); /* lcd_d16 */
        imx233_set_pin_function(1, 17, PINCTRL_FUNCTION_GPIO); /* lcd_d17 */
        imx233_set_pin_function(1, 19, PINCTRL_FUNCTION_GPIO); /* lcd_rs */
        imx233_set_pin_function(1, 20, PINCTRL_FUNCTION_GPIO); /* lcd_wr */
        imx233_set_pin_function(1, 21, PINCTRL_FUNCTION_GPIO); /* lcd_cs */
        imx233_set_pin_function(1, 23, PINCTRL_FUNCTION_GPIO); /* lcd_enable */
        imx233_set_pin_function(1, 25, PINCTRL_FUNCTION_GPIO); /* lcd_vsync */
    }
}

static void common_lcd_enable(bool enable)
{
    imx233_lcdif_enable(enable);
    setup_lcd_pins(enable); /* use GPIO pins when disable */
}

static void setup_lcdif(void)
{
    setup_parameters();
    common_lcd_enable(true);
    imx233_lcdif_enable_bus_master(true);
}

static void setup_lcdif_clock(void)
{
    /* the LCD seems to work at 24Mhz, so use the xtal clock with no divider */
    imx233_clkctrl_enable_clock(CLK_PIX, false);
    imx233_clkctrl_set_clock_divisor(CLK_PIX, 1);
    imx233_clkctrl_set_bypass_pll(CLK_PIX, true); /* use XTAL */
    imx233_clkctrl_enable_clock(CLK_PIX, true);
}

static void lcd_write_reg(uint32_t reg, uint32_t data)
{
    imx233_lcdif_pio_send(false, 2, &reg);
    if(reg != 0x22)
        imx233_lcdif_pio_send(true, 2, &data);
}

#define REG_UDELAY  0xffffffff
struct lcd_sequence_entry_t
{
    uint32_t reg, data;
};

static void lcd_send_sequence(struct lcd_sequence_entry_t *seq, unsigned count)
{
    for(;count-- > 0; seq++)
    {
        if(seq->reg == REG_UDELAY)
            udelay(seq->data);
        else
            lcd_write_reg(seq->reg, seq->data);
    }
}

#define _begin_seq() static struct lcd_sequence_entry_t __seq[] = {
#define _udelay(a) {REG_UDELAY, a},
#define _lcd_write_reg(a, b) {a, b},
#define _end_seq() }; lcd_send_sequence(__seq, sizeof(__seq) / sizeof(__seq[0]));

static void lcd_init_seq(void)
{
    _begin_seq()
    _lcd_write_reg(1, 0x11c)
    _lcd_write_reg(2, 0x100)
    _lcd_write_reg(3, 0x1030)
    _lcd_write_reg(8, 0x808)
    _lcd_write_reg(0xc, 0)
    _lcd_write_reg(0xf, 0xc01)
    _lcd_write_reg(0x20, 0)
    _lcd_write_reg(0x21, 0)
    _udelay(30)
    _lcd_write_reg(0x10, 0xa00)
    _lcd_write_reg(0x11, 0x1038)
    _udelay(30)
    _lcd_write_reg(0x12, 0x1010)
    _lcd_write_reg(0x13, 0x50)
    _lcd_write_reg(0x14, 0x4f58)
    _lcd_write_reg(0x30, 0)
    _lcd_write_reg(0x31, 0xdb)
    _lcd_write_reg(0x32, 0)
    _lcd_write_reg(0x33, 0)
    _lcd_write_reg(0x34, 0xdb)
    _lcd_write_reg(0x35, 0)
    _lcd_write_reg(0x36, 0xaf)
    _lcd_write_reg(0x37, 0)
    _lcd_write_reg(0x38, 0xdb)
    _lcd_write_reg(0x39, 0)
    _lcd_write_reg(0x50, 0)
    _lcd_write_reg(0x51, 0x705)
    _lcd_write_reg(0x52, 0xe0a)
    _lcd_write_reg(0x53, 0x300)
    _lcd_write_reg(0x54, 0xa0e)
    _lcd_write_reg(0x55, 0x507)
    _lcd_write_reg(0x56, 0)
    _lcd_write_reg(0x57, 3)
    _lcd_write_reg(0x58, 0x90a)
    _lcd_write_reg(0x59, 0xa09)
    _udelay(30)
    _lcd_write_reg(7, 0x1017)
    _udelay(40)
    _end_seq()
}

void lcd_init_device(void)
{
    setup_lcdif();
    setup_lcdif_clock();

    // reset device
    __REG_SET(HW_LCDIF_CTRL1) = HW_LCDIF_CTRL1__RESET;
    mdelay(50);
    __REG_CLR(HW_LCDIF_CTRL1) = HW_LCDIF_CTRL1__RESET;
    mdelay(10);
    __REG_SET(HW_LCDIF_CTRL1) = HW_LCDIF_CTRL1__RESET;

    lcd_init_seq();
#ifdef HAVE_LCD_ENABLE
    lcd_on = true;
#endif
}

#ifdef HAVE_LCD_ENABLE
bool lcd_active(void)
{
    return lcd_on;
}

static void lcd_enable_seq(bool enable)
{
    if(!enable)
    {
        _begin_seq()
        _end_seq()
    }
    else
    {
        _begin_seq()
        _end_seq()
    }
}

void lcd_enable(bool enable)
{
    if(lcd_on == enable)
        return;

    lcd_on = enable;
    
    if(enable)
        common_lcd_enable(true);
    lcd_enable_seq(enable);
    if(!enable)
        common_lcd_enable(false);
    else
        send_event(LCD_EVENT_ACTIVATION, NULL);
}
#endif

void lcd_update(void)
{
    lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
}

void lcd_update_rect(int x, int y, int w, int h)
{
#ifdef HAVE_LCD_ENABLE
    if(!lcd_on)
        return;
#endif
    /* make sure the rectangle is included in the screen */
    x = MIN(x, LCD_WIDTH);
    y = MIN(y, LCD_HEIGHT);
    w = MIN(w, LCD_WIDTH - x);
    h = MIN(h, LCD_HEIGHT - y);
    
    imx233_lcdif_wait_ready();
    lcd_write_reg(0x37, x);
    lcd_write_reg(0x36, x + w - 1);
    lcd_write_reg(0x39, y);
    lcd_write_reg(0x38, y + h - 1);
    lcd_write_reg(0x20, x);
    lcd_write_reg(0x21, y);
    lcd_write_reg(0x22, 0);
    
    imx233_lcdif_wait_ready();
    imx233_lcdif_set_word_length(HW_LCDIF_CTRL__WORD_LENGTH_16_BIT);
    imx233_lcdif_set_byte_packing_format(0xf); /* two pixels per 32-bit word */
    imx233_lcdif_set_data_format(false, false, false); /* RGB565, don't care, don't care */

    /* there are two cases here:
     * - either width = LCD_WIDTH and we can directly memcopy a part of lcd_framebuffer to FRAME
     *   and send it
     * - either width != LCD_WIDTH and we have to build a contiguous copy of the rectangular area
     *   into FRAME before sending it (which is slower and doesn't use the hardware)
     * In all cases, FRAME just acts as a temporary buffer.
     * NOTE It's more interesting to do a copy to FRAME in all cases since in system mode
     * the clock runs at 24MHz which provides barely 10MB/s bandwidth compared to >100MB/s
     * for memcopy operations
     */
    if(w == LCD_WIDTH)
    {
        memcpy((void *)FRAME, FBADDR(x,y), w * h * sizeof(fb_data));
    }
    else
    {
        for(int i = 0; i < h; i++)
            memcpy((fb_data *)FRAME + i * w, FBADDR(x,y + i), w * sizeof(fb_data));
    }
    /* WARNING The LCDIF has a limitation on the vertical count ! In 16-bit packed mode
     * (which we used, ie 16-bit per pixel, 2 pixels per 32-bit words), the v_count
     * field must be a multiple of 2. Furthermore, it seems the lcd controller doesn't
     * really like when both w and h are even, probably because the writes to the GRAM
     * are done on several words and the controller requires dummy writes.
     * The workaround is to always make sure that we send a number of pixels which is
     * a multiple of 4 so that both the lcdif and the controller are happy. If any
     * of w or h is odd, we will send a copy of the first pixels as dummy writes. We will
     * send at most 3 bytes. We then send (w * h + 3) / 4 x 4 bytes.
     */
    if(w % 2 == 1 || h % 2 == 1)
    {
        /* copy three pixel after the last one */
        for(int i = 0; i < 3; i++)
            *((fb_data *)FRAME + w * h + i) = *((fb_data *)FRAME + i);
        /* WARNING we need to update w and h to reflect the pixel count BUT it
         * has no relation to w * h (it can even be 2 * prime). Hopefully, w <= 240 and
         * h <= 320 so w * h <= 76800 and (w * h + 3) / 4 <= 38400 which fits into
         * a 16-bit integer (horizontal count). */
        h = (w * h + 3) / 4;
        w = 4;
    }
    imx233_lcdif_dma_send((void *)FRAME_PHYS_ADDR, w, h);
}

void lcd_yuv_set_options(unsigned options)
{
    lcd_yuv_options = options;
}

#define YFAC    (74)
#define RVFAC   (101)
#define GUFAC   (-24)
#define GVFAC   (-51)
#define BUFAC   (128)

static inline int clamp(int val, int min, int max)
{
    if (val < min)
        val = min;
    else if (val > max)
        val = max;
    return val;
}

void lcd_blit_yuv(unsigned char * const src[3],
                  int src_x, int src_y, int stride,
                  int x, int y, int width, int height)
{
    const unsigned char *ysrc, *usrc, *vsrc;
    int linecounter;
    fb_data *dst, *row_end;
    long z;

    /* width and height must be >= 2 and an even number */
    width &= ~1;
    linecounter = height >> 1;

    #if LCD_WIDTH >= LCD_HEIGHT
    dst     = FBADDR(x,y);
    row_end = dst + width;
    #else
    dst     = FBADDR(LCD_WIDTH - y - 1,x);
    row_end = dst + LCD_WIDTH * width;
    #endif

    z    = stride * src_y;
    ysrc = src[0] + z + src_x;
    usrc = src[1] + (z >> 2) + (src_x >> 1);
    vsrc = src[2] + (usrc - src[1]);

    /* stride => amount to jump from end of last row to start of next */
    stride -= width;

    /* upsampling, YUV->RGB conversion and reduction to RGB565 in one go */

    do
    {
        do
        {
            int y, cb, cr, rv, guv, bu, r, g, b;

            y  = YFAC*(*ysrc++ - 16);
            cb = *usrc++ - 128;
            cr = *vsrc++ - 128;

            rv  =            RVFAC*cr;
            guv = GUFAC*cb + GVFAC*cr;
            bu  = BUFAC*cb;

            r = y + rv;
            g = y + guv;
            b = y + bu;

            if ((unsigned)(r | g | b) > 64*256-1)
            {
                r = clamp(r, 0, 64*256-1);
                g = clamp(g, 0, 64*256-1);
                b = clamp(b, 0, 64*256-1);
            }

            *dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);

            #if LCD_WIDTH >= LCD_HEIGHT
            dst++;
            #else
            dst += LCD_WIDTH;
            #endif

            y = YFAC*(*ysrc++ - 16);
            r = y + rv;
            g = y + guv;
            b = y + bu;

            if ((unsigned)(r | g | b) > 64*256-1)
            {
                r = clamp(r, 0, 64*256-1);
                g = clamp(g, 0, 64*256-1);
                b = clamp(b, 0, 64*256-1);
            }

            *dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);

            #if LCD_WIDTH >= LCD_HEIGHT
            dst++;
            #else
            dst += LCD_WIDTH;
            #endif
        }
        while (dst < row_end);

        ysrc    += stride;
        usrc    -= width >> 1;
        vsrc    -= width >> 1;

        #if LCD_WIDTH >= LCD_HEIGHT
        row_end += LCD_WIDTH;
        dst     += LCD_WIDTH - width;
        #else
        row_end -= 1;
        dst     -= LCD_WIDTH*width + 1;
        #endif

        do
        {
            int y, cb, cr, rv, guv, bu, r, g, b;

            y  = YFAC*(*ysrc++ - 16);
            cb = *usrc++ - 128;
            cr = *vsrc++ - 128;

            rv  =            RVFAC*cr;
            guv = GUFAC*cb + GVFAC*cr;
            bu  = BUFAC*cb;

            r = y + rv;
            g = y + guv;
            b = y + bu;

            if ((unsigned)(r | g | b) > 64*256-1)
            {
                r = clamp(r, 0, 64*256-1);
                g = clamp(g, 0, 64*256-1);
                b = clamp(b, 0, 64*256-1);
            }

            *dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);

            #if LCD_WIDTH >= LCD_HEIGHT
            dst++;
            #else
            dst += LCD_WIDTH;
            #endif

            y = YFAC*(*ysrc++ - 16);
            r = y + rv;
            g = y + guv;
            b = y + bu;

            if ((unsigned)(r | g | b) > 64*256-1)
            {
                r = clamp(r, 0, 64*256-1);
                g = clamp(g, 0, 64*256-1);
                b = clamp(b, 0, 64*256-1);
            }

            *dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);

            #if LCD_WIDTH >= LCD_HEIGHT
            dst++;
            #else
            dst += LCD_WIDTH;
            #endif
        }
        while (dst < row_end);

        ysrc    += stride;
        usrc    += stride >> 1;
        vsrc    += stride >> 1;

        #if LCD_WIDTH >= LCD_HEIGHT
        row_end += LCD_WIDTH;
        dst     += LCD_WIDTH - width;
        #else
        row_end -= 1;
        dst     -= LCD_WIDTH*width + 1;
        #endif
    }
    while (--linecounter > 0);

    #if LCD_WIDTH >= LCD_HEIGHT
    lcd_update_rect(x, y, width, height);
    #else
    lcd_update_rect(LCD_WIDTH - y - height, x, height, width);
    #endif
}