3 * Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
5 * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/platform_device.h>
15 #include <linux/sched.h>
16 #include <linux/errno.h>
17 #include <linux/string.h>
18 #include <linux/interrupt.h>
19 #include <linux/slab.h>
21 #include <linux/delay.h>
22 #include <linux/init.h>
23 #include <linux/ioport.h>
24 #include <linux/dma-mapping.h>
25 #include <linux/dmaengine.h>
26 #include <linux/console.h>
27 #include <linux/clk.h>
28 #include <linux/mutex.h>
29 #include <linux/dma/ipu-dma.h>
30 #include <linux/backlight.h>
32 #include <linux/platform_data/dma-imx.h>
33 #include <linux/platform_data/video-mx3fb.h>
36 #include <asm/uaccess.h>
38 #define MX3FB_NAME "mx3_sdc_fb"
40 #define MX3FB_REG_OFFSET 0xB4
43 #define SDC_COM_CONF (0xB4 - MX3FB_REG_OFFSET)
44 #define SDC_GW_CTRL (0xB8 - MX3FB_REG_OFFSET)
45 #define SDC_FG_POS (0xBC - MX3FB_REG_OFFSET)
46 #define SDC_BG_POS (0xC0 - MX3FB_REG_OFFSET)
47 #define SDC_CUR_POS (0xC4 - MX3FB_REG_OFFSET)
48 #define SDC_PWM_CTRL (0xC8 - MX3FB_REG_OFFSET)
49 #define SDC_CUR_MAP (0xCC - MX3FB_REG_OFFSET)
50 #define SDC_HOR_CONF (0xD0 - MX3FB_REG_OFFSET)
51 #define SDC_VER_CONF (0xD4 - MX3FB_REG_OFFSET)
52 #define SDC_SHARP_CONF_1 (0xD8 - MX3FB_REG_OFFSET)
53 #define SDC_SHARP_CONF_2 (0xDC - MX3FB_REG_OFFSET)
56 #define SDC_COM_TFT_COLOR 0x00000001UL
57 #define SDC_COM_FG_EN 0x00000010UL
58 #define SDC_COM_GWSEL 0x00000020UL
59 #define SDC_COM_GLB_A 0x00000040UL
60 #define SDC_COM_KEY_COLOR_G 0x00000080UL
61 #define SDC_COM_BG_EN 0x00000200UL
62 #define SDC_COM_SHARP 0x00001000UL
64 #define SDC_V_SYNC_WIDTH_L 0x00000001UL
66 /* Display Interface registers */
67 #define DI_DISP_IF_CONF (0x0124 - MX3FB_REG_OFFSET)
68 #define DI_DISP_SIG_POL (0x0128 - MX3FB_REG_OFFSET)
69 #define DI_SER_DISP1_CONF (0x012C - MX3FB_REG_OFFSET)
70 #define DI_SER_DISP2_CONF (0x0130 - MX3FB_REG_OFFSET)
71 #define DI_HSP_CLK_PER (0x0134 - MX3FB_REG_OFFSET)
72 #define DI_DISP0_TIME_CONF_1 (0x0138 - MX3FB_REG_OFFSET)
73 #define DI_DISP0_TIME_CONF_2 (0x013C - MX3FB_REG_OFFSET)
74 #define DI_DISP0_TIME_CONF_3 (0x0140 - MX3FB_REG_OFFSET)
75 #define DI_DISP1_TIME_CONF_1 (0x0144 - MX3FB_REG_OFFSET)
76 #define DI_DISP1_TIME_CONF_2 (0x0148 - MX3FB_REG_OFFSET)
77 #define DI_DISP1_TIME_CONF_3 (0x014C - MX3FB_REG_OFFSET)
78 #define DI_DISP2_TIME_CONF_1 (0x0150 - MX3FB_REG_OFFSET)
79 #define DI_DISP2_TIME_CONF_2 (0x0154 - MX3FB_REG_OFFSET)
80 #define DI_DISP2_TIME_CONF_3 (0x0158 - MX3FB_REG_OFFSET)
81 #define DI_DISP3_TIME_CONF (0x015C - MX3FB_REG_OFFSET)
82 #define DI_DISP0_DB0_MAP (0x0160 - MX3FB_REG_OFFSET)
83 #define DI_DISP0_DB1_MAP (0x0164 - MX3FB_REG_OFFSET)
84 #define DI_DISP0_DB2_MAP (0x0168 - MX3FB_REG_OFFSET)
85 #define DI_DISP0_CB0_MAP (0x016C - MX3FB_REG_OFFSET)
86 #define DI_DISP0_CB1_MAP (0x0170 - MX3FB_REG_OFFSET)
87 #define DI_DISP0_CB2_MAP (0x0174 - MX3FB_REG_OFFSET)
88 #define DI_DISP1_DB0_MAP (0x0178 - MX3FB_REG_OFFSET)
89 #define DI_DISP1_DB1_MAP (0x017C - MX3FB_REG_OFFSET)
90 #define DI_DISP1_DB2_MAP (0x0180 - MX3FB_REG_OFFSET)
91 #define DI_DISP1_CB0_MAP (0x0184 - MX3FB_REG_OFFSET)
92 #define DI_DISP1_CB1_MAP (0x0188 - MX3FB_REG_OFFSET)
93 #define DI_DISP1_CB2_MAP (0x018C - MX3FB_REG_OFFSET)
94 #define DI_DISP2_DB0_MAP (0x0190 - MX3FB_REG_OFFSET)
95 #define DI_DISP2_DB1_MAP (0x0194 - MX3FB_REG_OFFSET)
96 #define DI_DISP2_DB2_MAP (0x0198 - MX3FB_REG_OFFSET)
97 #define DI_DISP2_CB0_MAP (0x019C - MX3FB_REG_OFFSET)
98 #define DI_DISP2_CB1_MAP (0x01A0 - MX3FB_REG_OFFSET)
99 #define DI_DISP2_CB2_MAP (0x01A4 - MX3FB_REG_OFFSET)
100 #define DI_DISP3_B0_MAP (0x01A8 - MX3FB_REG_OFFSET)
101 #define DI_DISP3_B1_MAP (0x01AC - MX3FB_REG_OFFSET)
102 #define DI_DISP3_B2_MAP (0x01B0 - MX3FB_REG_OFFSET)
103 #define DI_DISP_ACC_CC (0x01B4 - MX3FB_REG_OFFSET)
104 #define DI_DISP_LLA_CONF (0x01B8 - MX3FB_REG_OFFSET)
105 #define DI_DISP_LLA_DATA (0x01BC - MX3FB_REG_OFFSET)
107 /* DI_DISP_SIG_POL bits */
108 #define DI_D3_VSYNC_POL_SHIFT 28
109 #define DI_D3_HSYNC_POL_SHIFT 27
110 #define DI_D3_DRDY_SHARP_POL_SHIFT 26
111 #define DI_D3_CLK_POL_SHIFT 25
112 #define DI_D3_DATA_POL_SHIFT 24
114 /* DI_DISP_IF_CONF bits */
115 #define DI_D3_CLK_IDLE_SHIFT 26
116 #define DI_D3_CLK_SEL_SHIFT 25
117 #define DI_D3_DATAMSK_SHIFT 24
124 struct ipu_di_signal_cfg {
125 unsigned datamask_en:1;
126 unsigned clksel_en:1;
127 unsigned clkidle_en:1;
128 unsigned data_pol:1; /* true = inverted */
129 unsigned clk_pol:1; /* true = rising edge */
130 unsigned enable_pol:1;
131 unsigned Hsync_pol:1; /* true = active high */
132 unsigned Vsync_pol:1;
135 static const struct fb_videomode mx3fb_modedb[] = {
137 /* 240x320 @ 60 Hz */
138 .name = "Sharp-QVGA",
149 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_SHARP_MODE |
150 FB_SYNC_CLK_INVERT | FB_SYNC_DATA_INVERT |
152 .vmode = FB_VMODE_NONINTERLACED,
164 .lower_margin = 9 + 287,
167 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_SHARP_MODE |
168 FB_SYNC_CLK_INVERT | FB_SYNC_DATA_INVERT |
170 .vmode = FB_VMODE_NONINTERLACED,
173 /* 640x480 @ 60 Hz */
185 .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_OE_ACT_HIGH,
186 .vmode = FB_VMODE_NONINTERLACED,
196 .right_margin = 858 - 640 - 38 - 3,
198 .lower_margin = 518 - 480 - 36 - 1,
202 .vmode = FB_VMODE_NONINTERLACED,
212 .right_margin = 960 - 640 - 38 - 32,
214 .lower_margin = 555 - 480 - 32 - 3,
218 .vmode = FB_VMODE_NONINTERLACED,
221 /* TV output VGA mode, 640x480 @ 65 Hz */
234 .vmode = FB_VMODE_NONINTERLACED,
242 void __iomem *reg_base;
245 struct backlight_device *bl;
247 uint32_t h_start_width;
248 uint32_t v_start_width;
249 enum disp_data_mapping disp_data_fmt;
252 struct dma_chan_request {
253 struct mx3fb_data *mx3fb;
257 /* MX3 specific framebuffer information. */
260 enum ipu_channel ipu_ch;
261 uint32_t cur_ipu_buf;
263 u32 pseudo_palette[16];
265 struct completion flip_cmpl;
266 struct mutex mutex; /* Protects fb-ops */
267 struct mx3fb_data *mx3fb;
268 struct idmac_channel *idmac_channel;
269 struct dma_async_tx_descriptor *txd;
271 struct scatterlist sg[2];
273 struct fb_var_screeninfo cur_var; /* current var info */
276 static void sdc_set_brightness(struct mx3fb_data *mx3fb, uint8_t value);
277 static u32 sdc_get_brightness(struct mx3fb_data *mx3fb);
279 static int mx3fb_bl_get_brightness(struct backlight_device *bl)
281 struct mx3fb_data *fbd = bl_get_data(bl);
283 return sdc_get_brightness(fbd);
286 static int mx3fb_bl_update_status(struct backlight_device *bl)
288 struct mx3fb_data *fbd = bl_get_data(bl);
289 int brightness = bl->props.brightness;
291 if (bl->props.power != FB_BLANK_UNBLANK)
293 if (bl->props.fb_blank != FB_BLANK_UNBLANK)
296 fbd->backlight_level = (fbd->backlight_level & ~0xFF) | brightness;
298 sdc_set_brightness(fbd, fbd->backlight_level);
303 static const struct backlight_ops mx3fb_lcdc_bl_ops = {
304 .update_status = mx3fb_bl_update_status,
305 .get_brightness = mx3fb_bl_get_brightness,
308 static void mx3fb_init_backlight(struct mx3fb_data *fbd)
310 struct backlight_properties props;
311 struct backlight_device *bl;
316 memset(&props, 0, sizeof(struct backlight_properties));
317 props.max_brightness = 0xff;
318 props.type = BACKLIGHT_RAW;
319 sdc_set_brightness(fbd, fbd->backlight_level);
321 bl = backlight_device_register("mx3fb-bl", fbd->dev, fbd,
322 &mx3fb_lcdc_bl_ops, &props);
324 dev_err(fbd->dev, "error %ld on backlight register\n",
330 bl->props.power = FB_BLANK_UNBLANK;
331 bl->props.fb_blank = FB_BLANK_UNBLANK;
332 bl->props.brightness = mx3fb_bl_get_brightness(bl);
335 static void mx3fb_exit_backlight(struct mx3fb_data *fbd)
338 backlight_device_unregister(fbd->bl);
341 static void mx3fb_dma_done(void *);
343 /* Used fb-mode and bpp. Can be set on kernel command line, therefore file-static. */
344 static const char *fb_mode;
345 static unsigned long default_bpp = 16;
347 static u32 mx3fb_read_reg(struct mx3fb_data *mx3fb, unsigned long reg)
349 return __raw_readl(mx3fb->reg_base + reg);
352 static void mx3fb_write_reg(struct mx3fb_data *mx3fb, u32 value, unsigned long reg)
354 __raw_writel(value, mx3fb->reg_base + reg);
361 static const struct di_mapping di_mappings[] = {
362 [IPU_DISP_DATA_MAPPING_RGB666] = { 0x0005000f, 0x000b000f, 0x0011000f },
363 [IPU_DISP_DATA_MAPPING_RGB565] = { 0x0004003f, 0x000a000f, 0x000f003f },
364 [IPU_DISP_DATA_MAPPING_RGB888] = { 0x00070000, 0x000f0000, 0x00170000 },
367 static void sdc_fb_init(struct mx3fb_info *fbi)
369 struct mx3fb_data *mx3fb = fbi->mx3fb;
372 reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
374 mx3fb_write_reg(mx3fb, reg | SDC_COM_BG_EN, SDC_COM_CONF);
377 /* Returns enabled flag before uninit */
378 static uint32_t sdc_fb_uninit(struct mx3fb_info *fbi)
380 struct mx3fb_data *mx3fb = fbi->mx3fb;
383 reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
385 mx3fb_write_reg(mx3fb, reg & ~SDC_COM_BG_EN, SDC_COM_CONF);
387 return reg & SDC_COM_BG_EN;
390 static void sdc_enable_channel(struct mx3fb_info *mx3_fbi)
392 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
393 struct idmac_channel *ichan = mx3_fbi->idmac_channel;
394 struct dma_chan *dma_chan = &ichan->dma_chan;
399 dev_dbg(mx3fb->dev, "mx3fbi %p, desc %p, sg %p\n", mx3_fbi,
400 to_tx_desc(mx3_fbi->txd), to_tx_desc(mx3_fbi->txd)->sg);
402 dev_dbg(mx3fb->dev, "mx3fbi %p, txd = NULL\n", mx3_fbi);
404 /* This enables the channel */
405 if (mx3_fbi->cookie < 0) {
406 mx3_fbi->txd = dmaengine_prep_slave_sg(dma_chan,
407 &mx3_fbi->sg[0], 1, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT);
409 dev_err(mx3fb->dev, "Cannot allocate descriptor on %d\n",
414 mx3_fbi->txd->callback_param = mx3_fbi->txd;
415 mx3_fbi->txd->callback = mx3fb_dma_done;
417 cookie = mx3_fbi->txd->tx_submit(mx3_fbi->txd);
418 dev_dbg(mx3fb->dev, "%d: Submit %p #%d [%c]\n", __LINE__,
419 mx3_fbi->txd, cookie, list_empty(&ichan->queue) ? '-' : '+');
421 if (!mx3_fbi->txd || !mx3_fbi->txd->tx_submit) {
422 dev_err(mx3fb->dev, "Cannot enable channel %d\n",
427 /* Just re-activate the same buffer */
428 dma_async_issue_pending(dma_chan);
429 cookie = mx3_fbi->cookie;
430 dev_dbg(mx3fb->dev, "%d: Re-submit %p #%d [%c]\n", __LINE__,
431 mx3_fbi->txd, cookie, list_empty(&ichan->queue) ? '-' : '+');
435 spin_lock_irqsave(&mx3fb->lock, flags);
436 sdc_fb_init(mx3_fbi);
437 mx3_fbi->cookie = cookie;
438 spin_unlock_irqrestore(&mx3fb->lock, flags);
442 * Attention! Without this msleep the channel keeps generating
443 * interrupts. Next sdc_set_brightness() is going to be called
444 * from mx3fb_blank().
449 static void sdc_disable_channel(struct mx3fb_info *mx3_fbi)
451 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
455 if (mx3_fbi->txd == NULL)
458 spin_lock_irqsave(&mx3fb->lock, flags);
460 enabled = sdc_fb_uninit(mx3_fbi);
462 spin_unlock_irqrestore(&mx3fb->lock, flags);
464 dmaengine_terminate_all(mx3_fbi->txd->chan);
466 mx3_fbi->cookie = -EINVAL;
470 * sdc_set_window_pos() - set window position of the respective plane.
471 * @mx3fb: mx3fb context.
472 * @channel: IPU DMAC channel ID.
473 * @x_pos: X coordinate relative to the top left corner to place window at.
474 * @y_pos: Y coordinate relative to the top left corner to place window at.
475 * @return: 0 on success or negative error code on failure.
477 static int sdc_set_window_pos(struct mx3fb_data *mx3fb, enum ipu_channel channel,
478 int16_t x_pos, int16_t y_pos)
480 if (channel != IDMAC_SDC_0)
483 x_pos += mx3fb->h_start_width;
484 y_pos += mx3fb->v_start_width;
486 mx3fb_write_reg(mx3fb, (x_pos << 16) | y_pos, SDC_BG_POS);
491 * sdc_init_panel() - initialize a synchronous LCD panel.
492 * @mx3fb: mx3fb context.
493 * @panel: panel type.
494 * @pixel_clk: desired pixel clock frequency in Hz.
495 * @width: width of panel in pixels.
496 * @height: height of panel in pixels.
497 * @h_start_width: number of pixel clocks between the HSYNC signal pulse
498 * and the start of valid data.
499 * @h_sync_width: width of the HSYNC signal in units of pixel clocks.
500 * @h_end_width: number of pixel clocks between the end of valid data
501 * and the HSYNC signal for next line.
502 * @v_start_width: number of lines between the VSYNC signal pulse and the
503 * start of valid data.
504 * @v_sync_width: width of the VSYNC signal in units of lines
505 * @v_end_width: number of lines between the end of valid data and the
506 * VSYNC signal for next frame.
507 * @sig: bitfield of signal polarities for LCD interface.
508 * @return: 0 on success or negative error code on failure.
510 static int sdc_init_panel(struct mx3fb_data *mx3fb, enum ipu_panel panel,
512 uint16_t width, uint16_t height,
513 uint16_t h_start_width, uint16_t h_sync_width,
514 uint16_t h_end_width, uint16_t v_start_width,
515 uint16_t v_sync_width, uint16_t v_end_width,
516 struct ipu_di_signal_cfg sig)
518 unsigned long lock_flags;
523 const struct di_mapping *map;
525 dev_dbg(mx3fb->dev, "panel size = %d x %d", width, height);
527 if (v_sync_width == 0 || h_sync_width == 0)
530 /* Init panel size and blanking periods */
531 reg = ((uint32_t) (h_sync_width - 1) << 26) |
532 ((uint32_t) (width + h_start_width + h_end_width - 1) << 16);
533 mx3fb_write_reg(mx3fb, reg, SDC_HOR_CONF);
536 printk(KERN_CONT " hor_conf %x,", reg);
539 reg = ((uint32_t) (v_sync_width - 1) << 26) | SDC_V_SYNC_WIDTH_L |
540 ((uint32_t) (height + v_start_width + v_end_width - 1) << 16);
541 mx3fb_write_reg(mx3fb, reg, SDC_VER_CONF);
544 printk(KERN_CONT " ver_conf %x\n", reg);
547 mx3fb->h_start_width = h_start_width;
548 mx3fb->v_start_width = v_start_width;
551 case IPU_PANEL_SHARP_TFT:
552 mx3fb_write_reg(mx3fb, 0x00FD0102L, SDC_SHARP_CONF_1);
553 mx3fb_write_reg(mx3fb, 0x00F500F4L, SDC_SHARP_CONF_2);
554 mx3fb_write_reg(mx3fb, SDC_COM_SHARP | SDC_COM_TFT_COLOR, SDC_COM_CONF);
557 mx3fb_write_reg(mx3fb, SDC_COM_TFT_COLOR, SDC_COM_CONF);
566 * Calculate divider: fractional part is 4 bits so simply multiple by
567 * 2^4 to get fractional part, as long as we stay under ~250MHz and on
568 * i.MX31 it (HSP_CLK) is <= 178MHz. Currently 128.267MHz
570 ipu_clk = clk_get(mx3fb->dev, NULL);
571 if (!IS_ERR(ipu_clk)) {
572 div = clk_get_rate(ipu_clk) * 16 / pixel_clk;
578 if (div < 0x40) { /* Divider less than 4 */
580 "InitPanel() - Pixel clock divider less than 4\n");
584 dev_dbg(mx3fb->dev, "pixel clk = %u, divider %u.%u\n",
585 pixel_clk, div >> 4, (div & 7) * 125);
587 spin_lock_irqsave(&mx3fb->lock, lock_flags);
590 * DISP3_IF_CLK_DOWN_WR is half the divider value and 2 fraction bits
591 * fewer. Subtract 1 extra from DISP3_IF_CLK_DOWN_WR based on timing
592 * debug. DISP3_IF_CLK_UP_WR is 0
594 mx3fb_write_reg(mx3fb, (((div / 8) - 1) << 22) | div, DI_DISP3_TIME_CONF);
597 old_conf = mx3fb_read_reg(mx3fb, DI_DISP_IF_CONF) & 0x78FFFFFF;
598 old_conf |= sig.datamask_en << DI_D3_DATAMSK_SHIFT |
599 sig.clksel_en << DI_D3_CLK_SEL_SHIFT |
600 sig.clkidle_en << DI_D3_CLK_IDLE_SHIFT;
601 mx3fb_write_reg(mx3fb, old_conf, DI_DISP_IF_CONF);
603 old_conf = mx3fb_read_reg(mx3fb, DI_DISP_SIG_POL) & 0xE0FFFFFF;
604 old_conf |= sig.data_pol << DI_D3_DATA_POL_SHIFT |
605 sig.clk_pol << DI_D3_CLK_POL_SHIFT |
606 sig.enable_pol << DI_D3_DRDY_SHARP_POL_SHIFT |
607 sig.Hsync_pol << DI_D3_HSYNC_POL_SHIFT |
608 sig.Vsync_pol << DI_D3_VSYNC_POL_SHIFT;
609 mx3fb_write_reg(mx3fb, old_conf, DI_DISP_SIG_POL);
611 map = &di_mappings[mx3fb->disp_data_fmt];
612 mx3fb_write_reg(mx3fb, map->b0, DI_DISP3_B0_MAP);
613 mx3fb_write_reg(mx3fb, map->b1, DI_DISP3_B1_MAP);
614 mx3fb_write_reg(mx3fb, map->b2, DI_DISP3_B2_MAP);
616 spin_unlock_irqrestore(&mx3fb->lock, lock_flags);
618 dev_dbg(mx3fb->dev, "DI_DISP_IF_CONF = 0x%08X\n",
619 mx3fb_read_reg(mx3fb, DI_DISP_IF_CONF));
620 dev_dbg(mx3fb->dev, "DI_DISP_SIG_POL = 0x%08X\n",
621 mx3fb_read_reg(mx3fb, DI_DISP_SIG_POL));
622 dev_dbg(mx3fb->dev, "DI_DISP3_TIME_CONF = 0x%08X\n",
623 mx3fb_read_reg(mx3fb, DI_DISP3_TIME_CONF));
629 * sdc_set_color_key() - set the transparent color key for SDC graphic plane.
630 * @mx3fb: mx3fb context.
631 * @channel: IPU DMAC channel ID.
632 * @enable: boolean to enable or disable color keyl.
633 * @color_key: 24-bit RGB color to use as transparent color key.
634 * @return: 0 on success or negative error code on failure.
636 static int sdc_set_color_key(struct mx3fb_data *mx3fb, enum ipu_channel channel,
637 bool enable, uint32_t color_key)
639 uint32_t reg, sdc_conf;
640 unsigned long lock_flags;
642 spin_lock_irqsave(&mx3fb->lock, lock_flags);
644 sdc_conf = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
645 if (channel == IDMAC_SDC_0)
646 sdc_conf &= ~SDC_COM_GWSEL;
648 sdc_conf |= SDC_COM_GWSEL;
651 reg = mx3fb_read_reg(mx3fb, SDC_GW_CTRL) & 0xFF000000L;
652 mx3fb_write_reg(mx3fb, reg | (color_key & 0x00FFFFFFL),
655 sdc_conf |= SDC_COM_KEY_COLOR_G;
657 sdc_conf &= ~SDC_COM_KEY_COLOR_G;
659 mx3fb_write_reg(mx3fb, sdc_conf, SDC_COM_CONF);
661 spin_unlock_irqrestore(&mx3fb->lock, lock_flags);
667 * sdc_set_global_alpha() - set global alpha blending modes.
668 * @mx3fb: mx3fb context.
669 * @enable: boolean to enable or disable global alpha blending. If disabled,
670 * per pixel blending is used.
671 * @alpha: global alpha value.
672 * @return: 0 on success or negative error code on failure.
674 static int sdc_set_global_alpha(struct mx3fb_data *mx3fb, bool enable, uint8_t alpha)
677 unsigned long lock_flags;
679 spin_lock_irqsave(&mx3fb->lock, lock_flags);
682 reg = mx3fb_read_reg(mx3fb, SDC_GW_CTRL) & 0x00FFFFFFL;
683 mx3fb_write_reg(mx3fb, reg | ((uint32_t) alpha << 24), SDC_GW_CTRL);
685 reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
686 mx3fb_write_reg(mx3fb, reg | SDC_COM_GLB_A, SDC_COM_CONF);
688 reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
689 mx3fb_write_reg(mx3fb, reg & ~SDC_COM_GLB_A, SDC_COM_CONF);
692 spin_unlock_irqrestore(&mx3fb->lock, lock_flags);
697 static u32 sdc_get_brightness(struct mx3fb_data *mx3fb)
701 brightness = mx3fb_read_reg(mx3fb, SDC_PWM_CTRL);
702 brightness = (brightness >> 16) & 0xFF;
707 static void sdc_set_brightness(struct mx3fb_data *mx3fb, uint8_t value)
709 dev_dbg(mx3fb->dev, "%s: value = %d\n", __func__, value);
710 /* This might be board-specific */
711 mx3fb_write_reg(mx3fb, 0x03000000UL | value << 16, SDC_PWM_CTRL);
715 static uint32_t bpp_to_pixfmt(int bpp)
720 pixfmt = IPU_PIX_FMT_BGR24;
723 pixfmt = IPU_PIX_FMT_BGR32;
726 pixfmt = IPU_PIX_FMT_RGB565;
732 static int mx3fb_blank(int blank, struct fb_info *fbi);
733 static int mx3fb_map_video_memory(struct fb_info *fbi, unsigned int mem_len,
735 static int mx3fb_unmap_video_memory(struct fb_info *fbi);
738 * mx3fb_set_fix() - set fixed framebuffer parameters from variable settings.
739 * @info: framebuffer information pointer
740 * @return: 0 on success or negative error code on failure.
742 static int mx3fb_set_fix(struct fb_info *fbi)
744 struct fb_fix_screeninfo *fix = &fbi->fix;
745 struct fb_var_screeninfo *var = &fbi->var;
747 strncpy(fix->id, "DISP3 BG", 8);
749 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
751 fix->type = FB_TYPE_PACKED_PIXELS;
752 fix->accel = FB_ACCEL_NONE;
753 fix->visual = FB_VISUAL_TRUECOLOR;
760 static void mx3fb_dma_done(void *arg)
762 struct idmac_tx_desc *tx_desc = to_tx_desc(arg);
763 struct dma_chan *chan = tx_desc->txd.chan;
764 struct idmac_channel *ichannel = to_idmac_chan(chan);
765 struct mx3fb_data *mx3fb = ichannel->client;
766 struct mx3fb_info *mx3_fbi = mx3fb->fbi->par;
768 dev_dbg(mx3fb->dev, "irq %d callback\n", ichannel->eof_irq);
770 /* We only need one interrupt, it will be re-enabled as needed */
771 disable_irq_nosync(ichannel->eof_irq);
773 complete(&mx3_fbi->flip_cmpl);
776 static bool mx3fb_must_set_par(struct fb_info *fbi)
778 struct mx3fb_info *mx3_fbi = fbi->par;
779 struct fb_var_screeninfo old_var = mx3_fbi->cur_var;
780 struct fb_var_screeninfo new_var = fbi->var;
782 if ((fbi->var.activate & FB_ACTIVATE_FORCE) &&
783 (fbi->var.activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW)
787 * Ignore xoffset and yoffset update,
788 * because pan display handles this case.
790 old_var.xoffset = new_var.xoffset;
791 old_var.yoffset = new_var.yoffset;
793 return !!memcmp(&old_var, &new_var, sizeof(struct fb_var_screeninfo));
796 static int __set_par(struct fb_info *fbi, bool lock)
798 u32 mem_len, cur_xoffset, cur_yoffset;
799 struct ipu_di_signal_cfg sig_cfg;
800 enum ipu_panel mode = IPU_PANEL_TFT;
801 struct mx3fb_info *mx3_fbi = fbi->par;
802 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
803 struct idmac_channel *ichan = mx3_fbi->idmac_channel;
804 struct idmac_video_param *video = &ichan->params.video;
805 struct scatterlist *sg = mx3_fbi->sg;
809 sdc_disable_channel(mx3_fbi);
813 mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
814 if (mem_len > fbi->fix.smem_len) {
815 if (fbi->fix.smem_start)
816 mx3fb_unmap_video_memory(fbi);
818 if (mx3fb_map_video_memory(fbi, mem_len, lock) < 0)
822 sg_init_table(&sg[0], 1);
823 sg_init_table(&sg[1], 1);
825 sg_dma_address(&sg[0]) = fbi->fix.smem_start;
826 sg_set_page(&sg[0], virt_to_page(fbi->screen_base),
828 offset_in_page(fbi->screen_base));
830 if (mx3_fbi->ipu_ch == IDMAC_SDC_0) {
831 memset(&sig_cfg, 0, sizeof(sig_cfg));
832 if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
833 sig_cfg.Hsync_pol = true;
834 if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
835 sig_cfg.Vsync_pol = true;
836 if (fbi->var.sync & FB_SYNC_CLK_INVERT)
837 sig_cfg.clk_pol = true;
838 if (fbi->var.sync & FB_SYNC_DATA_INVERT)
839 sig_cfg.data_pol = true;
840 if (fbi->var.sync & FB_SYNC_OE_ACT_HIGH)
841 sig_cfg.enable_pol = true;
842 if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
843 sig_cfg.clkidle_en = true;
844 if (fbi->var.sync & FB_SYNC_CLK_SEL_EN)
845 sig_cfg.clksel_en = true;
846 if (fbi->var.sync & FB_SYNC_SHARP_MODE)
847 mode = IPU_PANEL_SHARP_TFT;
849 dev_dbg(fbi->device, "pixclock = %ul Hz\n",
850 (u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL));
852 if (sdc_init_panel(mx3fb, mode,
853 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
854 fbi->var.xres, fbi->var.yres,
855 fbi->var.left_margin,
857 fbi->var.right_margin +
859 fbi->var.upper_margin,
861 fbi->var.lower_margin +
862 fbi->var.vsync_len, sig_cfg) != 0) {
864 "mx3fb: Error initializing panel.\n");
869 sdc_set_window_pos(mx3fb, mx3_fbi->ipu_ch, 0, 0);
871 mx3_fbi->cur_ipu_buf = 0;
873 video->out_pixel_fmt = bpp_to_pixfmt(fbi->var.bits_per_pixel);
874 video->out_width = fbi->var.xres;
875 video->out_height = fbi->var.yres;
876 video->out_stride = fbi->var.xres_virtual;
878 if (mx3_fbi->blank == FB_BLANK_UNBLANK) {
879 sdc_enable_channel(mx3_fbi);
881 * sg[0] points to fb smem_start address
882 * and is actually active in controller.
884 mx3_fbi->cur_var.xoffset = 0;
885 mx3_fbi->cur_var.yoffset = 0;
889 * Preserve xoffset and yoffest in case they are
890 * inactive in controller as fb is blanked.
892 cur_xoffset = mx3_fbi->cur_var.xoffset;
893 cur_yoffset = mx3_fbi->cur_var.yoffset;
894 mx3_fbi->cur_var = fbi->var;
895 mx3_fbi->cur_var.xoffset = cur_xoffset;
896 mx3_fbi->cur_var.yoffset = cur_yoffset;
902 * mx3fb_set_par() - set framebuffer parameters and change the operating mode.
903 * @fbi: framebuffer information pointer.
904 * @return: 0 on success or negative error code on failure.
906 static int mx3fb_set_par(struct fb_info *fbi)
908 struct mx3fb_info *mx3_fbi = fbi->par;
909 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
910 struct idmac_channel *ichan = mx3_fbi->idmac_channel;
913 dev_dbg(mx3fb->dev, "%s [%c]\n", __func__, list_empty(&ichan->queue) ? '-' : '+');
915 mutex_lock(&mx3_fbi->mutex);
917 ret = mx3fb_must_set_par(fbi) ? __set_par(fbi, true) : 0;
919 mutex_unlock(&mx3_fbi->mutex);
925 * mx3fb_check_var() - check and adjust framebuffer variable parameters.
926 * @var: framebuffer variable parameters
927 * @fbi: framebuffer information pointer
929 static int mx3fb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
931 struct mx3fb_info *mx3_fbi = fbi->par;
935 dev_dbg(fbi->device, "%s\n", __func__);
937 if (var->xres_virtual < var->xres)
938 var->xres_virtual = var->xres;
939 if (var->yres_virtual < var->yres)
940 var->yres_virtual = var->yres;
942 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
943 (var->bits_per_pixel != 16))
944 var->bits_per_pixel = default_bpp;
946 switch (var->bits_per_pixel) {
949 var->red.offset = 11;
950 var->red.msb_right = 0;
952 var->green.length = 6;
953 var->green.offset = 5;
954 var->green.msb_right = 0;
956 var->blue.length = 5;
957 var->blue.offset = 0;
958 var->blue.msb_right = 0;
960 var->transp.length = 0;
961 var->transp.offset = 0;
962 var->transp.msb_right = 0;
966 var->red.offset = 16;
967 var->red.msb_right = 0;
969 var->green.length = 8;
970 var->green.offset = 8;
971 var->green.msb_right = 0;
973 var->blue.length = 8;
974 var->blue.offset = 0;
975 var->blue.msb_right = 0;
977 var->transp.length = 0;
978 var->transp.offset = 0;
979 var->transp.msb_right = 0;
983 var->red.offset = 16;
984 var->red.msb_right = 0;
986 var->green.length = 8;
987 var->green.offset = 8;
988 var->green.msb_right = 0;
990 var->blue.length = 8;
991 var->blue.offset = 0;
992 var->blue.msb_right = 0;
994 var->transp.length = 8;
995 var->transp.offset = 24;
996 var->transp.msb_right = 0;
1000 if (var->pixclock < 1000) {
1001 htotal = var->xres + var->right_margin + var->hsync_len +
1003 vtotal = var->yres + var->lower_margin + var->vsync_len +
1005 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
1006 var->pixclock = KHZ2PICOS(var->pixclock);
1007 dev_dbg(fbi->device, "pixclock set for 60Hz refresh = %u ps\n",
1015 /* Preserve sync flags */
1016 var->sync |= mx3_fbi->cur_var.sync;
1017 mx3_fbi->cur_var.sync |= var->sync;
1022 static u32 chan_to_field(unsigned int chan, struct fb_bitfield *bf)
1025 chan >>= 16 - bf->length;
1026 return chan << bf->offset;
1029 static int mx3fb_setcolreg(unsigned int regno, unsigned int red,
1030 unsigned int green, unsigned int blue,
1031 unsigned int trans, struct fb_info *fbi)
1033 struct mx3fb_info *mx3_fbi = fbi->par;
1037 dev_dbg(fbi->device, "%s, regno = %u\n", __func__, regno);
1039 mutex_lock(&mx3_fbi->mutex);
1041 * If greyscale is true, then we convert the RGB value
1042 * to greyscale no matter what visual we are using.
1044 if (fbi->var.grayscale)
1045 red = green = blue = (19595 * red + 38470 * green +
1047 switch (fbi->fix.visual) {
1048 case FB_VISUAL_TRUECOLOR:
1050 * 16-bit True Colour. We encode the RGB value
1051 * according to the RGB bitfield information.
1054 u32 *pal = fbi->pseudo_palette;
1056 val = chan_to_field(red, &fbi->var.red);
1057 val |= chan_to_field(green, &fbi->var.green);
1058 val |= chan_to_field(blue, &fbi->var.blue);
1066 case FB_VISUAL_STATIC_PSEUDOCOLOR:
1067 case FB_VISUAL_PSEUDOCOLOR:
1070 mutex_unlock(&mx3_fbi->mutex);
1075 static void __blank(int blank, struct fb_info *fbi)
1077 struct mx3fb_info *mx3_fbi = fbi->par;
1078 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
1079 int was_blank = mx3_fbi->blank;
1081 mx3_fbi->blank = blank;
1084 * Do not call sdc_disable_channel() for a channel that is disabled
1085 * already! This will result in a kernel NULL pointer dereference
1086 * (mx3_fbi->txd is NULL). Hide the fact, that all blank modes are
1087 * handled equally by this driver.
1089 if (blank > FB_BLANK_UNBLANK && was_blank > FB_BLANK_UNBLANK)
1093 case FB_BLANK_POWERDOWN:
1094 case FB_BLANK_VSYNC_SUSPEND:
1095 case FB_BLANK_HSYNC_SUSPEND:
1096 case FB_BLANK_NORMAL:
1097 sdc_set_brightness(mx3fb, 0);
1098 memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
1099 /* Give LCD time to update - enough for 50 and 60 Hz */
1101 sdc_disable_channel(mx3_fbi);
1103 case FB_BLANK_UNBLANK:
1104 sdc_enable_channel(mx3_fbi);
1105 sdc_set_brightness(mx3fb, mx3fb->backlight_level);
1111 * mx3fb_blank() - blank the display.
1113 static int mx3fb_blank(int blank, struct fb_info *fbi)
1115 struct mx3fb_info *mx3_fbi = fbi->par;
1117 dev_dbg(fbi->device, "%s, blank = %d, base %p, len %u\n", __func__,
1118 blank, fbi->screen_base, fbi->fix.smem_len);
1120 if (mx3_fbi->blank == blank)
1123 mutex_lock(&mx3_fbi->mutex);
1124 __blank(blank, fbi);
1125 mutex_unlock(&mx3_fbi->mutex);
1131 * mx3fb_pan_display() - pan or wrap the display
1132 * @var: variable screen buffer information.
1133 * @info: framebuffer information pointer.
1135 * We look only at xoffset, yoffset and the FB_VMODE_YWRAP flag
1137 static int mx3fb_pan_display(struct fb_var_screeninfo *var,
1138 struct fb_info *fbi)
1140 struct mx3fb_info *mx3_fbi = fbi->par;
1144 dma_cookie_t cookie;
1145 struct scatterlist *sg = mx3_fbi->sg;
1146 struct dma_chan *dma_chan = &mx3_fbi->idmac_channel->dma_chan;
1147 struct dma_async_tx_descriptor *txd;
1150 dev_dbg(fbi->device, "%s [%c]\n", __func__,
1151 list_empty(&mx3_fbi->idmac_channel->queue) ? '-' : '+');
1153 if (var->xoffset > 0) {
1154 dev_dbg(fbi->device, "x panning not supported\n");
1158 if (mx3_fbi->cur_var.xoffset == var->xoffset &&
1159 mx3_fbi->cur_var.yoffset == var->yoffset)
1160 return 0; /* No change, do nothing */
1162 y_bottom = var->yoffset;
1164 if (!(var->vmode & FB_VMODE_YWRAP))
1165 y_bottom += fbi->var.yres;
1167 if (y_bottom > fbi->var.yres_virtual)
1170 mutex_lock(&mx3_fbi->mutex);
1172 offset = var->yoffset * fbi->fix.line_length
1173 + var->xoffset * (fbi->var.bits_per_pixel / 8);
1174 base = fbi->fix.smem_start + offset;
1176 dev_dbg(fbi->device, "Updating SDC BG buf %d address=0x%08lX\n",
1177 mx3_fbi->cur_ipu_buf, base);
1180 * We enable the End of Frame interrupt, which will free a tx-descriptor,
1181 * which we will need for the next dmaengine_prep_slave_sg(). The
1182 * IRQ-handler will disable the IRQ again.
1184 init_completion(&mx3_fbi->flip_cmpl);
1185 enable_irq(mx3_fbi->idmac_channel->eof_irq);
1187 ret = wait_for_completion_timeout(&mx3_fbi->flip_cmpl, HZ / 10);
1189 mutex_unlock(&mx3_fbi->mutex);
1190 dev_info(fbi->device, "Panning failed due to %s\n", ret < 0 ?
1191 "user interrupt" : "timeout");
1192 disable_irq(mx3_fbi->idmac_channel->eof_irq);
1193 return ret ? : -ETIMEDOUT;
1196 mx3_fbi->cur_ipu_buf = !mx3_fbi->cur_ipu_buf;
1198 sg_dma_address(&sg[mx3_fbi->cur_ipu_buf]) = base;
1199 sg_set_page(&sg[mx3_fbi->cur_ipu_buf],
1200 virt_to_page(fbi->screen_base + offset), fbi->fix.smem_len,
1201 offset_in_page(fbi->screen_base + offset));
1204 async_tx_ack(mx3_fbi->txd);
1206 txd = dmaengine_prep_slave_sg(dma_chan, sg +
1207 mx3_fbi->cur_ipu_buf, 1, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT);
1209 dev_err(fbi->device,
1210 "Error preparing a DMA transaction descriptor.\n");
1211 mutex_unlock(&mx3_fbi->mutex);
1215 txd->callback_param = txd;
1216 txd->callback = mx3fb_dma_done;
1219 * Emulate original mx3fb behaviour: each new call to idmac_tx_submit()
1220 * should switch to another buffer
1222 cookie = txd->tx_submit(txd);
1223 dev_dbg(fbi->device, "%d: Submit %p #%d\n", __LINE__, txd, cookie);
1225 dev_err(fbi->device,
1226 "Error updating SDC buf %d to address=0x%08lX\n",
1227 mx3_fbi->cur_ipu_buf, base);
1228 mutex_unlock(&mx3_fbi->mutex);
1234 fbi->var.xoffset = var->xoffset;
1235 fbi->var.yoffset = var->yoffset;
1237 if (var->vmode & FB_VMODE_YWRAP)
1238 fbi->var.vmode |= FB_VMODE_YWRAP;
1240 fbi->var.vmode &= ~FB_VMODE_YWRAP;
1242 mx3_fbi->cur_var = fbi->var;
1244 mutex_unlock(&mx3_fbi->mutex);
1246 dev_dbg(fbi->device, "Update complete\n");
1252 * This structure contains the pointers to the control functions that are
1253 * invoked by the core framebuffer driver to perform operations like
1254 * blitting, rectangle filling, copy regions and cursor definition.
1256 static struct fb_ops mx3fb_ops = {
1257 .owner = THIS_MODULE,
1258 .fb_set_par = mx3fb_set_par,
1259 .fb_check_var = mx3fb_check_var,
1260 .fb_setcolreg = mx3fb_setcolreg,
1261 .fb_pan_display = mx3fb_pan_display,
1262 .fb_fillrect = cfb_fillrect,
1263 .fb_copyarea = cfb_copyarea,
1264 .fb_imageblit = cfb_imageblit,
1265 .fb_blank = mx3fb_blank,
1270 * Power management hooks. Note that we won't be called from IRQ context,
1271 * unlike the blank functions above, so we may sleep.
1275 * Suspends the framebuffer and blanks the screen. Power management support
1277 static int mx3fb_suspend(struct platform_device *pdev, pm_message_t state)
1279 struct mx3fb_data *mx3fb = platform_get_drvdata(pdev);
1280 struct mx3fb_info *mx3_fbi = mx3fb->fbi->par;
1283 fb_set_suspend(mx3fb->fbi, 1);
1286 if (mx3_fbi->blank == FB_BLANK_UNBLANK) {
1287 sdc_disable_channel(mx3_fbi);
1288 sdc_set_brightness(mx3fb, 0);
1295 * Resumes the framebuffer and unblanks the screen. Power management support
1297 static int mx3fb_resume(struct platform_device *pdev)
1299 struct mx3fb_data *mx3fb = platform_get_drvdata(pdev);
1300 struct mx3fb_info *mx3_fbi = mx3fb->fbi->par;
1302 if (mx3_fbi->blank == FB_BLANK_UNBLANK) {
1303 sdc_enable_channel(mx3_fbi);
1304 sdc_set_brightness(mx3fb, mx3fb->backlight_level);
1308 fb_set_suspend(mx3fb->fbi, 0);
1314 #define mx3fb_suspend NULL
1315 #define mx3fb_resume NULL
1319 * Main framebuffer functions
1323 * mx3fb_map_video_memory() - allocates the DRAM memory for the frame buffer.
1324 * @fbi: framebuffer information pointer
1325 * @mem_len: length of mapped memory
1326 * @lock: do not lock during initialisation
1327 * @return: Error code indicating success or failure
1329 * This buffer is remapped into a non-cached, non-buffered, memory region to
1330 * allow palette and pixel writes to occur without flushing the cache. Once this
1331 * area is remapped, all virtual memory access to the video memory should occur
1332 * at the new region.
1334 static int mx3fb_map_video_memory(struct fb_info *fbi, unsigned int mem_len,
1340 fbi->screen_base = dma_alloc_writecombine(fbi->device,
1342 &addr, GFP_DMA | GFP_KERNEL);
1344 if (!fbi->screen_base) {
1345 dev_err(fbi->device, "Cannot allocate %u bytes framebuffer memory\n",
1352 mutex_lock(&fbi->mm_lock);
1353 fbi->fix.smem_start = addr;
1354 fbi->fix.smem_len = mem_len;
1356 mutex_unlock(&fbi->mm_lock);
1358 dev_dbg(fbi->device, "allocated fb @ p=0x%08x, v=0x%p, size=%d.\n",
1359 (uint32_t) fbi->fix.smem_start, fbi->screen_base, fbi->fix.smem_len);
1361 fbi->screen_size = fbi->fix.smem_len;
1363 /* Clear the screen */
1364 memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
1369 fbi->fix.smem_len = 0;
1370 fbi->fix.smem_start = 0;
1371 fbi->screen_base = NULL;
1376 * mx3fb_unmap_video_memory() - de-allocate frame buffer memory.
1377 * @fbi: framebuffer information pointer
1378 * @return: error code indicating success or failure
1380 static int mx3fb_unmap_video_memory(struct fb_info *fbi)
1382 dma_free_writecombine(fbi->device, fbi->fix.smem_len,
1383 fbi->screen_base, fbi->fix.smem_start);
1385 fbi->screen_base = NULL;
1386 mutex_lock(&fbi->mm_lock);
1387 fbi->fix.smem_start = 0;
1388 fbi->fix.smem_len = 0;
1389 mutex_unlock(&fbi->mm_lock);
1394 * mx3fb_init_fbinfo() - initialize framebuffer information object.
1395 * @return: initialized framebuffer structure.
1397 static struct fb_info *mx3fb_init_fbinfo(struct device *dev, struct fb_ops *ops)
1399 struct fb_info *fbi;
1400 struct mx3fb_info *mx3fbi;
1403 /* Allocate sufficient memory for the fb structure */
1404 fbi = framebuffer_alloc(sizeof(struct mx3fb_info), dev);
1409 mx3fbi->cookie = -EINVAL;
1410 mx3fbi->cur_ipu_buf = 0;
1412 fbi->var.activate = FB_ACTIVATE_NOW;
1415 fbi->flags = FBINFO_FLAG_DEFAULT;
1416 fbi->pseudo_palette = mx3fbi->pseudo_palette;
1418 mutex_init(&mx3fbi->mutex);
1420 /* Allocate colormap */
1421 ret = fb_alloc_cmap(&fbi->cmap, 16, 0);
1423 framebuffer_release(fbi);
1430 static int init_fb_chan(struct mx3fb_data *mx3fb, struct idmac_channel *ichan)
1432 struct device *dev = mx3fb->dev;
1433 struct mx3fb_platform_data *mx3fb_pdata = dev_get_platdata(dev);
1434 const char *name = mx3fb_pdata->name;
1436 struct fb_info *fbi;
1437 struct mx3fb_info *mx3fbi;
1438 const struct fb_videomode *mode;
1441 if (mx3fb_pdata->disp_data_fmt >= ARRAY_SIZE(di_mappings)) {
1442 dev_err(dev, "Illegal display data format %d\n",
1443 mx3fb_pdata->disp_data_fmt);
1447 ichan->client = mx3fb;
1448 irq = ichan->eof_irq;
1450 if (ichan->dma_chan.chan_id != IDMAC_SDC_0)
1453 fbi = mx3fb_init_fbinfo(dev, &mx3fb_ops);
1465 if (mx3fb_pdata->mode && mx3fb_pdata->num_modes) {
1466 mode = mx3fb_pdata->mode;
1467 num_modes = mx3fb_pdata->num_modes;
1469 mode = mx3fb_modedb;
1470 num_modes = ARRAY_SIZE(mx3fb_modedb);
1473 if (!fb_find_mode(&fbi->var, fbi, fb_mode, mode,
1474 num_modes, NULL, default_bpp)) {
1479 fb_videomode_to_modelist(mode, num_modes, &fbi->modelist);
1481 /* Default Y virtual size is 2x panel size */
1482 fbi->var.yres_virtual = fbi->var.yres * 2;
1486 /* set Display Interface clock period */
1487 mx3fb_write_reg(mx3fb, 0x00100010L, DI_HSP_CLK_PER);
1488 /* Might need to trigger HSP clock change - see 44.3.3.8.5 */
1490 sdc_set_brightness(mx3fb, 255);
1491 sdc_set_global_alpha(mx3fb, true, 0xFF);
1492 sdc_set_color_key(mx3fb, IDMAC_SDC_0, false, 0);
1495 mx3fbi->idmac_channel = ichan;
1496 mx3fbi->ipu_ch = ichan->dma_chan.chan_id;
1497 mx3fbi->mx3fb = mx3fb;
1498 mx3fbi->blank = FB_BLANK_NORMAL;
1500 mx3fb->disp_data_fmt = mx3fb_pdata->disp_data_fmt;
1502 init_completion(&mx3fbi->flip_cmpl);
1503 disable_irq(ichan->eof_irq);
1504 dev_dbg(mx3fb->dev, "disabling irq %d\n", ichan->eof_irq);
1505 ret = __set_par(fbi, false);
1509 __blank(FB_BLANK_UNBLANK, fbi);
1511 dev_info(dev, "registered, using mode %s\n", fb_mode);
1513 ret = register_framebuffer(fbi);
1522 fb_dealloc_cmap(&fbi->cmap);
1523 framebuffer_release(fbi);
1528 static bool chan_filter(struct dma_chan *chan, void *arg)
1530 struct dma_chan_request *rq = arg;
1532 struct mx3fb_platform_data *mx3fb_pdata;
1534 if (!imx_dma_is_ipu(chan))
1540 dev = rq->mx3fb->dev;
1541 mx3fb_pdata = dev_get_platdata(dev);
1543 return rq->id == chan->chan_id &&
1544 mx3fb_pdata->dma_dev == chan->device->dev;
1547 static void release_fbi(struct fb_info *fbi)
1549 mx3fb_unmap_video_memory(fbi);
1551 fb_dealloc_cmap(&fbi->cmap);
1553 unregister_framebuffer(fbi);
1554 framebuffer_release(fbi);
1557 static int mx3fb_probe(struct platform_device *pdev)
1559 struct device *dev = &pdev->dev;
1561 struct resource *sdc_reg;
1562 struct mx3fb_data *mx3fb;
1563 dma_cap_mask_t mask;
1564 struct dma_chan *chan;
1565 struct dma_chan_request rq;
1568 * Display Interface (DI) and Synchronous Display Controller (SDC)
1571 sdc_reg = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1575 mx3fb = devm_kzalloc(&pdev->dev, sizeof(*mx3fb), GFP_KERNEL);
1579 spin_lock_init(&mx3fb->lock);
1581 mx3fb->reg_base = ioremap(sdc_reg->start, resource_size(sdc_reg));
1582 if (!mx3fb->reg_base) {
1587 pr_debug("Remapped %pR at %p\n", sdc_reg, mx3fb->reg_base);
1589 /* IDMAC interface */
1593 platform_set_drvdata(pdev, mx3fb);
1598 dma_cap_set(DMA_SLAVE, mask);
1599 dma_cap_set(DMA_PRIVATE, mask);
1600 rq.id = IDMAC_SDC_0;
1601 chan = dma_request_channel(mask, chan_filter, &rq);
1607 mx3fb->backlight_level = 255;
1609 ret = init_fb_chan(mx3fb, to_idmac_chan(chan));
1613 mx3fb_init_backlight(mx3fb);
1618 dma_release_channel(chan);
1621 iounmap(mx3fb->reg_base);
1623 dev_err(dev, "mx3fb: failed to register fb\n");
1627 static int mx3fb_remove(struct platform_device *dev)
1629 struct mx3fb_data *mx3fb = platform_get_drvdata(dev);
1630 struct fb_info *fbi = mx3fb->fbi;
1631 struct mx3fb_info *mx3_fbi = fbi->par;
1632 struct dma_chan *chan;
1634 chan = &mx3_fbi->idmac_channel->dma_chan;
1637 mx3fb_exit_backlight(mx3fb);
1639 dma_release_channel(chan);
1642 iounmap(mx3fb->reg_base);
1646 static struct platform_driver mx3fb_driver = {
1649 .owner = THIS_MODULE,
1651 .probe = mx3fb_probe,
1652 .remove = mx3fb_remove,
1653 .suspend = mx3fb_suspend,
1654 .resume = mx3fb_resume,
1658 * Parse user specified options (`video=mx3fb:')
1660 * video=mx3fb:bpp=16
1662 static int __init mx3fb_setup(void)
1665 char *opt, *options = NULL;
1667 if (fb_get_options("mx3fb", &options))
1670 if (!options || !*options)
1673 while ((opt = strsep(&options, ",")) != NULL) {
1676 if (!strncmp(opt, "bpp=", 4))
1677 default_bpp = simple_strtoul(opt + 4, NULL, 0);
1686 static int __init mx3fb_init(void)
1688 int ret = mx3fb_setup();
1693 ret = platform_driver_register(&mx3fb_driver);
1697 static void __exit mx3fb_exit(void)
1699 platform_driver_unregister(&mx3fb_driver);
1702 module_init(mx3fb_init);
1703 module_exit(mx3fb_exit);
1705 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
1706 MODULE_DESCRIPTION("MX3 framebuffer driver");
1707 MODULE_ALIAS("platform:" MX3FB_NAME);
1708 MODULE_LICENSE("GPL v2");