1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2012 Freescale Semiconductor, Inc.
4  * Fabio Estevam <fabio.estevam@freescale.com>
5  */
6 
7 #include <common.h>
8 #include <linux/list.h>
9 #include <asm/gpio.h>
10 #include <asm/arch/iomux-mx51.h>
11 #include <linux/fb.h>
12 #include <ipu_pixfmt.h>
13 
14 #define MX51EVK_LCD_3V3		IMX_GPIO_NR(4, 9)
15 #define MX51EVK_LCD_5V		IMX_GPIO_NR(4, 10)
16 #define MX51EVK_LCD_BACKLIGHT	IMX_GPIO_NR(3, 4)
17 
18 static struct fb_videomode const claa_wvga = {
19 	.name		= "CLAA07LC0ACW",
20 	.refresh	= 57,
21 	.xres		= 800,
22 	.yres		= 480,
23 	.pixclock	= 37037,
24 	.left_margin	= 40,
25 	.right_margin	= 60,
26 	.upper_margin	= 10,
27 	.lower_margin	= 10,
28 	.hsync_len	= 20,
29 	.vsync_len	= 10,
30 	.sync		= 0,
31 	.vmode		= FB_VMODE_NONINTERLACED
32 };
33 
34 static struct fb_videomode const dvi = {
35 	.name		= "DVI panel",
36 	.refresh	= 60,
37 	.xres		= 1024,
38 	.yres		= 768,
39 	.pixclock	= 15385,
40 	.left_margin	= 220,
41 	.right_margin	= 40,
42 	.upper_margin	= 21,
43 	.lower_margin	= 7,
44 	.hsync_len	= 60,
45 	.vsync_len	= 10,
46 	.sync		= 0,
47 	.vmode		= FB_VMODE_NONINTERLACED
48 };
49 
50 void setup_iomux_lcd(void)
51 {
52 	/* DI2_PIN15 */
53 	imx_iomux_v3_setup_pad(MX51_PAD_DI_GP4__DI2_PIN15);
54 
55 	/* Pad settings for DI2_DISP_CLK */
56 	imx_iomux_v3_setup_pad(NEW_PAD_CTRL(MX51_PAD_DI2_DISP_CLK__DI2_DISP_CLK,
57 			    PAD_CTL_PKE | PAD_CTL_DSE_MAX | PAD_CTL_SRE_SLOW));
58 
59 	/* Turn on 3.3V voltage for LCD */
60 	imx_iomux_v3_setup_pad(NEW_PAD_CTRL(MX51_PAD_CSI2_D12__GPIO4_9,
61 						NO_PAD_CTRL));
62 	gpio_direction_output(MX51EVK_LCD_3V3, 1);
63 
64 	/* Turn on 5V voltage for LCD */
65 	imx_iomux_v3_setup_pad(NEW_PAD_CTRL(MX51_PAD_CSI2_D13__GPIO4_10,
66 						NO_PAD_CTRL));
67 	gpio_direction_output(MX51EVK_LCD_5V, 1);
68 
69 	/* Turn on GPIO backlight */
70 	imx_iomux_v3_setup_pad(NEW_PAD_CTRL(MX51_PAD_DI1_D1_CS__GPIO3_4,
71 						NO_PAD_CTRL));
72 	gpio_direction_output(MX51EVK_LCD_BACKLIGHT, 1);
73 }
74 
75 int board_video_skip(void)
76 {
77 	int ret;
78 	char const *e = env_get("panel");
79 
80 	if (e) {
81 		if (strcmp(e, "claa") == 0) {
82 			ret = ipuv3_fb_init(&claa_wvga, 1, IPU_PIX_FMT_RGB565);
83 			if (ret)
84 				printf("claa cannot be configured: %d\n", ret);
85 			return ret;
86 		}
87 	}
88 
89 	/*
90 	 * 'panel' env variable not found or has different value than 'claa'
91 	 *  Defaulting to dvi output.
92 	 */
93 	ret = ipuv3_fb_init(&dvi, 0, IPU_PIX_FMT_RGB24);
94 	if (ret)
95 		printf("dvi cannot be configured: %d\n", ret);
96 	return ret;
97 }
98