Linux lcd识别代码跟踪自己的lcd

朱雀 2022-02-01 08:51 241阅读 0赞

1，lcd参数设置：

static struct {
    	int id;
    	char *name;
    	struct nxp_lcd *lcd;
    	int dpi;
    	int ctp;
    	enum lcd_format fmt;
    } bd_lcd_config[] = {
    	{  25, "HD101",	&wxga_hd101,   0, 1, LCD_RGB  },
    	{  32, "HD101B",&wxga_hd101,   0, 1, LCD_RGB  },
    	{  18, "HD700",	&wxga_hd700, 213, 1, LCD_RGB  },
    	{  30, "HD702",	&wxga_hd700, 213, 1, LCD_RGB  },
        {  111, "AT080TN64", &wxga_at080tn64, 213, 1, LCD_RGB},
    	{  33, "H70",	&wxga_hd700, 213, 0, LCD_VESA },
    	{   3, "S70",	&wvga_s70,   128, 1, LCD_RGB  },
    	{  36, "S701",	&wvga_s70,   128, 1, LCD_RGB  },
    	{  24, "S702",	&wvga_s702,  128, 3, LCD_RGB  },
    	{  26, "S70D",	&wvga_s70d,  128, 0, LCD_RGB  },
    	{  14, "H43",	&hvga_h43,     0, 0, LCD_RGB  },
    	{  19, "P43",	&hvga_p43,     0, 0, LCD_RGB  },
    	{   8, "W35",	&qvga_w35,     0, 0, LCD_RGB  },
    	{  28, "X710",	&wsvga_x710,   0, 1, LCD_RGB  },
    	{  31, "S430",	&wvga_s430,  180, 1, LCD_RGB  },
    	{   4, "W50",	&wvga_w50,     0, 0, LCD_RGB  },
    
    	/* TODO: Testing */
    	{  15, "W101",	&wsvga_w101,   0, 1, LCD_RGB  },
    	{   5, "L80",	&vga_l80,      0, 1, LCD_RGB  },
    	{  -1, "A97",	&xga_a97,      0, 0, LCD_RGB  },
    	{  -1, "LQ150",	&xga_lq150,    0, 1, LCD_RGB  },
    	{  -1, "BP101",	&wxga_bp101,   0, 1, LCD_RGB  },
    	{ 128, "HDMI",	&hdmi_def,     0, 0, LCD_HDMI },	/* Pls keep it at last */
    };

2，bd\_lcd\_init

static void bd_lcd_init(void)
    {
    	struct nxp_lcd *cfg;
    	int id;
    	int ret;
    
    	id = onewire_get_lcd_id();
    	/* -1: onwire probe failed
    	 *  0: bad
    	 * >0: identified */
    
    	ret = bd_setup_lcd_by_id(id);
    	if (id <= 0 || ret != id) {
    		printf("Panel: N/A (%d)\n", id);
    		bd_setup_lcd_by_name("HDMI720P60");
    
    	} else {
    		printf("Panel: %s\n", bd_get_lcd_name());
    
    		cfg = bd_get_lcd();
    		if (cfg->gpio_init)
    			cfg->gpio_init();
    	}
    }

3，onewire\_get\_lcd\_id（获取lcd的id号）

int onewire_get_lcd_id(void)
    {
    	//return lcd_id;
            return 111;
    }

4 通过id号找到lcd（确定id号）

int bd_setup_lcd_by_id(int id)
    {
    	int i;
    
    	for (i = 0; i < ARRAY_SIZE(bd_lcd_config); i++) {
    		if (bd_lcd_config[i].id == id) {
    			lcd_idx = i;
    			break;
    		}
    	}
    
    	if (i >= ARRAY_SIZE(bd_lcd_config)) {
    		/* NOT found */
    		return -19;
    	}
    
    	return bd_lcd_config[i].id;
    }

5,通过id号找到相应的lcd名字

const char *bd_get_lcd_name(void)
    {
    	return bd_lcd_config[lcd_idx].name;
    }

6获取lcd的全部信息，包括一些lcd的物理参数（尺寸），极性等等，例如wxga\_at080tn64。

struct nxp_lcd *bd_get_lcd(void)
    {
    	return bd_lcd_config[lcd_idx].lcd;
    }

7,bd\_lcd\_config结构体中的struct nxp\_lcd \*lcd定义有一系列的lcd,我们需要选择我们用的lcd进行设置。

static struct nxp_lcd wxga_at080tn64 = {
    	.width = 800,
            .height = 480,
            .p_width = 155,
            .p_height = 93,
            .bpp = 24,
            .freq = 63,
    
            .timing = {
                    .h_fp = 210,
                    .h_bp = 46,
                    .h_sw = 20,
                    .v_fp = 22,
                    .v_fpe = 1,
                    .v_bp = 23,
                    .v_bpe = 1,
                    .v_sw = 10,
            },
            .polarity = {
                    .rise_vclk = 0,
                    .inv_hsync = 1,
                    .inv_vsync = 1,
                    .inv_vden = 0,
            },
            .gpio_init = s70_gpio_init,
    };

8,s70\_ gpio\_init,rgb三色设置，以及pclk设置。

static void s70_gpio_init(void)
    {
    	int i;
    
    	/* PVCLK */
    	nx_gpio_set_drive_strength(PAD_GPIO_A, 0, 3);
    
    	/* RGB24 */
    	for (i = 1; i < 25; i++)
    		nx_gpio_set_drive_strength(PAD_GPIO_A, i, 3);
    
    	/* HS/VS/DE */
    	for (; i < 28; i++)
    		nx_gpio_set_drive_strength(PAD_GPIO_A, i, 3);
    }