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全志 mipi屏幕和触摸驱动调试记录_sunxi_lcd_dsi_dcs_read

作者：花生_TL007 | 2024-03-28 17:40:22

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sunxi_lcd_dsi_dcs_read

第一步 查看原理图、全志硬件手册、屏幕手册

这个就不全部贴出来了

第二步 配置屏

路径：/root/workspace/allwinner/lichee/tools/pack/chips/sun8iw11p1/configs/a40-OKA40i_C/sys_config1024x600mipi.fex

  1. ;disp init configuration
  2. fb0_width                = 800
  3. fb0_height               = 1280
  1. ;lcd0 configuration
  2. lcd_used            = 1
  3. lcd_driver_name     = "tft720x1280"  ;与驱动名称一致,我没有新增，直接用已支持的驱动改的
  4. lcd_backlight       = 255
  5. lcd_if              = 4
  6. lcd_x               = 800                          ;根据屏幕厂家提供的填写，有些屏幕x与y是反过来的
  7. lcd_y               = 1280                        ;根据屏幕厂家提供的填写，有些屏幕x与y是反过来的
  8. ctp_touch_panel_max_x  = 800
  9. ctp_touch_panel_max_y  = 480
  10. lcd_width           =
  11. lcd_height          =
  12. lcd_dclk_freq       = 72                        ;传输像素传送频率。单位为MHz。lcd_dclk_freq=lcd_htlcd_vt，算出来的值再稍微大一些，我这边算出来是69左右，我用了72
  13. lcd_pwm_used        = 1                      ;此参数标识是否使用pwm 用以背光亮度的控制。我这边使用pwm进行控制背光，也定义了对应的lcd_bl_en来控制背光
  14. lcd_pwm_ch          = 1                        ; 此参数标识使用的Pwm 通道，这里是指使用SoC 哪个pwm 通道，通过查看原理图连接可知。我这边使用了1通道
  15. lcd_pwm_freq        = 50000
  16. lcd_pwm_pol         = 0
  17. lcd_pwm_max_limit   = 255
  18.  
  19. lcd_hbp             = 56                          ;根据如上图屏幕手册Input Timing定义对应值计算：THS+THB得出
  20. lcd_ht              = 908                          ;lcd_x+HS+HBP+HFP，如果屏幕手册已经有HT则直接填就行
  21. lcd_hspw            = 8                           ;根据如上图屏幕手册Input Timing定义填写
  22. lcd_vbp             = 22                          ;根据如上图屏幕手册Input Timing定义对应值计算：TVS+TVB得出
  23. lcd_vt              = 1317                         ;lcd_y+VS+VBP+VFP，如果屏幕手册已经有VT则直接填就行
  24. lcd_vspw            = 6                           ;根据如上图屏幕手册Input Timing定义填写
  25. lcd_lvds_if         = 0
  26. lcd_lvds_colordepth = 1
  27. lcd_lvds_mode       = 0
  28. lcd_frm             = 0
  29. lcd_hv_clk_phase    = 0
  30. lcd_hv_sync_polarity= 0
  31. lcd_gamma_en        = 0
  32. lcd_bright_curve_en = 0
  33. lcd_cmap_en         = 0
  34. lcd_dsi_if          = 0                             ;0：Video mode     1：Command mode      2：video burst mode ，我当时没有在意这个参数，我设置了1，然后一直背光亮，屏幕黑，后面改成0后，屏幕正常点亮
  35. lcd_dsi_lane        = 4                          ;屏幕支持的通道数，从1开始，1：1 data lane     2：2 data lane      3：3 data lane       4：4 data lane
  36. lcd_dsi_format      = 0                        ;0：Package Pixel Stream, 24bit RGB   1：Loosely Package Pixel Stream, 18bit RGB    2：Package Pixel Stream, 18bit RGB        3：Package Pixel Stream, 16bit RGB
  37. lcd_dsi_te          = 1                            ;0：frame trigged automatically     1：frame trigged by te rising edge    2：frame trigged by te falling edge
  38.  
  39. deu_mode            = 0
  40. lcdgamma4iep        = 22
  41. smart_color         = 90
  42.  
  43. lcd_bl_en           = port:PB3<1><0><default><1>           ;根据原理图和全志硬件手册填写背光引脚
  44. lcd_gpio_0           = port:PH11<1><0><default><1>      ;根据原理图和全志硬件手册填写电源使能（复位）引脚
  45. lcd_power           = "vcc-lcd"                                              ;3.3v屏幕供电
  46. lcd_power1           = "vcc-lcd"

第三步  增加屏幕驱动

注意：如果是新增文件则需要在panel、makefile等文件中按要求新增

1.关注是否需要初始化屏幕的指令序列，我这边是需要的，问屏幕厂家要即可

2.关注屏幕的打开电源与关闭电源的时序，从屏幕手册可以查到，如第一步的图2

3.关注屏幕背光打开与关闭

4.如果需要在boot启动过程中就要显示，需要在u-boot源码中修改对应驱动，和内核保持一致。

驱动源码如下：

u-boot路径:/root/workspace/allwinner/lichee/brandy/u-boot-2014.07/drivers/video/sunxi/disp2/disp/lcd/tft720x1280.c

内核路径：/root/workspace/allwinner/lichee/linux-3.10/drivers/video/sunxi/disp2/disp/lcd/tft720x1280.c

  1. #include "tft720x1280.h"
  2.  
  3. extern s32 bsp_disp_get_panel_info(u32 screen_id, disp_panel_para *info);
  4. static void LCD_power_on(u32 sel);
  5. static void LCD_power_off(u32 sel);
  6. static void LCD_bl_open(u32 sel);
  7. static void LCD_bl_close(u32 sel);
  8.  
  9. static void LCD_panel_init(u32 sel);
  10. static void LCD_panel_exit(u32 sel);
  11.  
  12. #define dsi_dcs_wr_0para sunxi_lcd_dsi_dcs_write_0para
  13. #define dsi_dcs_wr_1para sunxi_lcd_dsi_dcs_write_1para
  14. #define dsi_dcs_wr_2para sunxi_lcd_dsi_dcs_write_2para
  15. #define dsi_dcs_wr_3para sunxi_lcd_dsi_dcs_write_3para
  16. #define dsi_dcs_wr_4para sunxi_lcd_dsi_dcs_write_4para
  17. #define dsi_dcs_wr_5para sunxi_lcd_dsi_dcs_write_5para
  18. #define delayms sunxi_lcd_delay_ms
  19.  
  20. #define panel_reset(val)     sunxi_lcd_gpio_set_value(sel, 0, val)
  21. #define power_en(val)        sunxi_lcd_gpio_set_value(sel, 1, val)
  22.  
  23. #define REGFLAG_DELAY             						0xFE
  24. #define REGFLAG_END_OF_TABLE      						0xFD   // END OF REGISTERS MARKER
  25.  
  26. struct LCM_setting_table {
  27.     unsigned cmd;
  28.     unsigned char count;
  29.     unsigned char para_list[64];
  30. };
  31.  
  32. static struct LCM_setting_table lcm_initialization_setting[] = {
  33.  
  34.  //Page0
  35. 	{0xFF, 3, {0x98, 0x81, 0x03} },
  36. 	{0x01, 1, {0x00}},
  37. 	{0x02, 1, {0x00}},
  38. 	{0x03, 1, {0x53}},
  39. 	{0x04, 1, {0x53}},
  40. 	{0x05, 1, {0x13}},
  41. 	{0x06, 1, {0x04}},
  42. 	{0x07, 1, {0x02}},
  43. 	{0x08, 1, {0x02}},
  44. 	{0x09, 1,{0x00}},
  45. 	{0x0A, 1,{0x00}},
  46. 	{0x0B, 1,{0x00}},
  47. 	{0x0C, 1,{0x00}},
  48. 	{0x0D, 1,{0x00}},
  49. 	{0x0E, 1,{0x00}},
  50. 	{0x0F, 1,{0x00}},
  51. 	{0x10, 1,{0x00}},
  52. 	{0x11, 1,{0x00}},
  53. 	{0x12, 1,{0x00}},
  54. 	{0x13, 1,{0x00}},
  55. 	{0x14, 1,{0x00}},
  56. 	{0x15, 1,{0x00}},
  57. 	{0x16, 1,{0x00}},
  58. 	{0x17, 1,{0x00}},
  59. 	{0x18, 1,{0x00}},
  60. 	{0x19, 1,{0x00}},
  61. 	{0x1A, 1,{0x00}},
  62. 	{0x1B, 1,{0x00}},
  63. 	{0x1C, 1,{0x00}},
  64. 	{0x1D, 1,{0x00}},
  65. 	{0x1E, 1,{0xc0}},
  66. 	{0x1F, 1,{0x00}},
  67. 	{0x20, 1,{0x02}},
  68. 	{0x21, 1,{0x09}},
  69. 	{0x22, 1,{0x00}},
  70. 	{0x23, 1,{0x00}},
  71. 	{0x24, 1,{0x00}},
  72. 	{0x25, 1,{0x00}},
  73. 	{0x26, 1,{0x00}},
  74. 	{0x27, 1,{0x00}},
  75. 	{0x28, 1,{0x55}},
  76. 	{0x29, 1,{0x03}},
  77. 	{0x2A, 1,{0x00}},
  78. 	{0x2B, 1,{0x00}},
  79. 	{0x2C, 1,{0x00}},
  80. 	{0x2D, 1,{0x00}},
  81. 	{0x2E, 1,{0x00}},
  82. 	{0x2F, 1,{0x00}},
  83. 	{0x30, 1,{0x00}},
  84. 	{0x31, 1,{0x00}},
  85. 	{0x32, 1,{0x00}},
  86. 	{0x33, 1,{0x00}},
  87. 	{0x34, 1,{0x00}},  // GPWR1/2 non overlap time 2.62us
  88. 	{0x35, 1,{0x00}},
  89. 	{0x36, 1,{0x00}},
  90. 	{0x37, 1,{0x00}},
  91. 	{0x38, 1,{0x3c}},
  92. 	{0x39, 1,{0x00}},
  93. 	{0x3A, 1,{0x00}},
  94. 	{0x3B, 1,{0x00}},
  95. 	{0x3C, 1,{0x00}},
  96. 	{0x3D, 1,{0x00}},
  97. 	{0x3E, 1,{0x00}},
  98. 	{0x3F, 1,{0x00}},
  99. 	{0x40, 1,{0x00}},
  100. 	{0x41, 1,{0x00}},
  101. 	{0x42, 1,{0x00}},
  102. 	{0x43, 1,{0x00}},
  103. 	{0x44, 1,{0x00}},
  104. //{0x45, 1,{0x00}},
  105. 	
  106. 	{0x50, 1, {0x01} },
  107. 	{0x51, 1, {0x23} },
  108. 	{0x52, 1, {0x45} },
  109. 	{0x53, 1, {0x67} },
  110. 	{0x54, 1, {0x89} },
  111. 	{0x55, 1, {0xAB} },
  112. 	{0x56, 1, {0x01} },
  113. 	{0x57, 1, {0x23} },
  114. 	{0x58, 1, {0x45} },
  115. 	{0x59, 1, {0x67} },
  116. 	{0x5A, 1, {0x89} },
  117. 	{0x5B, 1, {0xAB} },
  118. 	{0x5C, 1, {0xCD} },
  119. 	{0x5D, 1, {0xEF} },
  120.  
  121. 	{0x5E, 1, {0x01} },
  122. 	{0x5F, 1, {0x0A} },
  123. 	{0x60, 1, {0x02} },
  124. 	{0x61, 1, {0x02} },
  125. 	{0x62, 1, {0x08} },
  126. 	{0x63, 1, {0x15} },
  127. 	{0x64, 1, {0x14} },
  128. 	{0x65, 1, {0x02} },
  129. 	{0x66, 1, {0x11} },
  130. 	{0x67, 1, {0x10} },
  131. 	{0x68, 1, {0x02} },
  132. 	{0x69, 1, {0x0F} },
  133. 	{0x6A, 1, {0x0E} },
  134. 	{0x6B, 1, {0x02} },
  135. 	{0x6C, 1, {0x0D} },
  136. 	{0x6D, 1, {0x0C} },
  137. 	{0x6E, 1, {0x06} },
  138. 	{0x6F, 1, {0x02} },
  139. 	{0x70, 1, {0x02} },
  140. 	{0x71, 1, {0x02} },
  141. 	{0x72, 1, {0x02} },
  142. 	{0x73, 1, {0x02} },
  143. 	{0x74, 1, {0x02} },
  144. 	{0x75, 1, {0x0A} },
  145. 	{0x76, 1, {0x02} },
  146. 	{0x77, 1, {0x02} },
  147. 	{0x78, 1, {0x06} },
  148. 	{0x79, 1, {0x15} },
  149. 	{0x7A, 1, {0x14} },
  150. 	{0x7B, 1, {0x02} },
  151. 	{0x7C, 1, {0x10} },
  152. 	{0x7D, 1, {0x11} },
  153. 	{0x7E, 1, {0x02} },
  154. 	{0x7F, 1, {0x0C} },
  155. 	{0x80, 1, {0x0D} },
  156. 	{0x81, 1, {0x02} },
  157. 	{0x82, 1, {0x0E} },
  158. 	{0x83, 1, {0x0F} },
  159. 	{0x84, 1, {0x08} },
  160. 	{0x85, 1, {0x02} },
  161. 	{0x86, 1, {0x02} },
  162. 	{0x87, 1, {0x02} },
  163. 	{0x88, 1, {0x02} },
  164. 	{0x89, 1, {0x02} },
  165. 	{0x8A, 1, {0x02} },
  166.  
  167. 	//Page 4 command;
  168. 	{0xFF, 3,{0x98,0x81,0x04}},
  169. //	{0x00, 1,{0x00}},//3L 
  170. 	{0x3B, 1,{0xC0}},	 // ILI4003D sel
  171. 	{0x6C, 1,{0x15}},		//Set VCORE voltage =1.5V
  172. 	{0x6E, 1,{0x30}},		//2A  di_pwr_reg=0 for power mode 2A //VGH clamp 18V
  173. 	{0x6F, 1,{0x55}},	//45 //pumping ratio VGH=5x VGL=-3x 	   
  174. 	{0x3A, 1,{0x24}},
  175. 	{0x8D, 1, {0x1F} },
  176. 	{0x87, 1, {0xBA} },
  177. 	//{0x3A, 1, {0x24} },
  178. 	{0x26, 1,{0x76}},
  179. 	{0xB2, 1,{0xD1}},
  180. 	{0xB5, 1,{0x07}},
  181. 	{0x35, 1,{0x1F}},
  182. 	{0x88, 1,{0x0B}},
  183. 	{0x21, 1,{0x30}},
  184. 	//TEST
  185. //	{0x2D, 1,{0xFF}},
  186. //	{0x2F, 1,{0x01}},
  187. 	
  188. 	 // Page 1 command 
  189. 	{0xFF, 3,{0x98,0x81,0x01}},
  190. 	{0x22, 1,{0x0A}},		//BGR, SS
  191. //	{0x53, 1,{0x40}},
  192. //	{0x55, 1,{0x40}},
  193. 	{0x31, 1,{0x09}},		//Zigzag type3 inversion
  194. 	{0x40, 1,{0x33}},		// ILI4003D sel 		 
  195. //	{0x43, 1,{0x66}},	  
  196. 	
  197. 	{0x53, 1,{0x37}},//4C		
  198. 	{0x55, 1, {0x38} },
  199. 	{0x50, 1, {0x95} },
  200. 	{0x51, 1, {0x95} },
  201. 	{0x60, 1, {0x30} },
  202. //	{0x61, 1, {0x01} },
  203. //	{0x62, 1, {0x0C} },
  204. //	{0x63, 1, {0x00} },
  205. 	{0xA0, 1, {0x0f} },
  206. 	{0xA1, 1, {0x17} },
  207. 	{0xA2, 1, {0x22} },
  208. 	{0xA3, 1, {0x19} },
  209. 	{0xA4, 1, {0x15} },
  210. 	{0xA5, 1, {0x28} },
  211. 	{0xA6, 1, {0x1c} },
  212. 	{0xA7, 1, {0x1c} },
  213. 	{0xA8, 1, {0x78} },
  214. 	{0xA9, 1, {0x1c} },
  215. 	{0xAA, 1, {0x28} },
  216. 	{0xAB, 1, {0x69} },
  217. 	{0xAC, 1, {0x1a} },
  218. 	{0xAD, 1, {0x19}},		//VP36			
  219. 	{0xAE, 1, {0x4B}},		//VP24			
  220. 	{0xAF, 1, {0x22} },
  221. 	{0xB0, 1, {0x2a} },
  222. 	{0xB1, 1, {0x4b} },
  223. 	{0xB2, 1, {0x6b} },
  224. 	{0xB3, 1, {0x3F} },
  225.  
  226. 	{0xC0, 1, {0x01} },
  227. 	{0xC1, 1, {0x17} },
  228. 	{0xC2, 1, {0x22} },
  229. 	{0xC3, 1, {0x19} },
  230. 	{0xC4, 1, {0x15} },
  231. 	{0xC5, 1, {0x28} },
  232. 	{0xC6, 1, {0x1c} },
  233. 	{0xC7, 1, {0x1D} },
  234. 	{0xC8, 1, {0x78} },
  235. 	{0xC9, 1, {0x1c} },
  236. 	{0xCA, 1, {0x28} },
  237. 	{0xCB, 1, {0x69} },
  238. 	{0xCC, 1, {0x1a} },
  239. 	{0xCD, 1, {0x19}},		//VN36			
  240. 	{0xCE, 1, {0x4B}},		//VN24			
  241. 	{0xCF, 1, {0x22}},		//VN16			
  242. 	{0xD0, 1, {0x2a}},		//VN12			
  243. 	{0xD1, 1, {0x4b}},		//VN8
  244. 	{0xD2, 1, {0x6b}},		//VN4
  245. 	{0xD3, 1, {0x3F}},		//VN0
  246. 	
  247. 	// Page 0 command
  248. 	{0xFF,3,{0x98,0x81,0x00}},
  249. 	//{0x35,1,{0x00}},  // TE On
  250. 	//{0x36,1,{0x03}}, 
  251. 	{0x11,0,{0x00}},  // Sleep Out			
  252. 	{REGFLAG_DELAY, 130, {}},
  253. 	
  254. 	{0x29,0,{0x00}},  //  Display On 
  255. 	{REGFLAG_DELAY, 30, {}},
  256.  
  257.     {REGFLAG_END_OF_TABLE, 0x00, {}}   
  258. };
  259.  
  260.  
  261.  
  262.  
  263.  
  264.  
  265. static void LCD_cfg_panel_info(panel_extend_para * info)
  266. {
  267. 	u32 i = 0, j=0;
  268. 	u32 items;
  269. 	u8 lcd_gamma_tbl[][2] =
  270. 	{
  271. 		//{input value, corrected value}
  272. 		{0, 0},
  273. 		{15, 15},
  274. 		{30, 30},
  275. 		{45, 45},
  276. 		{60, 60},
  277. 		{75, 75},
  278. 		{90, 90},
  279. 		{105, 105},
  280. 		{120, 120},
  281. 		{135, 135},
  282. 		{150, 150},
  283. 		{165, 165},
  284. 		{180, 180},
  285. 		{195, 195},
  286. 		{210, 210},
  287. 		{225, 225},
  288. 		{240, 240},
  289. 		{255, 255},
  290. 	};
  291.  
  292. 	u32 lcd_cmap_tbl[2][3][4] = {
  293. 	{
  294. 		{LCD_CMAP_G0,LCD_CMAP_B1,LCD_CMAP_G2,LCD_CMAP_B3},
  295. 		{LCD_CMAP_B0,LCD_CMAP_R1,LCD_CMAP_B2,LCD_CMAP_R3},
  296. 		{LCD_CMAP_R0,LCD_CMAP_G1,LCD_CMAP_R2,LCD_CMAP_G3},
  297. 		},
  298. 		{
  299. 		{LCD_CMAP_B3,LCD_CMAP_G2,LCD_CMAP_B1,LCD_CMAP_G0},
  300. 		{LCD_CMAP_R3,LCD_CMAP_B2,LCD_CMAP_R1,LCD_CMAP_B0},
  301. 		{LCD_CMAP_G3,LCD_CMAP_R2,LCD_CMAP_G1,LCD_CMAP_R0},
  302. 		},
  303. 	};
  304.  
  305. 	items = sizeof(lcd_gamma_tbl)/2;
  306. 	for (i=0; i<items-1; i++) {
  307. 		u32 num = lcd_gamma_tbl[i+1][0] - lcd_gamma_tbl[i][0];
  308.  
  309. 		for (j=0; j<num; j++) {
  310. 			u32 value = 0;
  311.  
  312. 			value = lcd_gamma_tbl[i][1] + ((lcd_gamma_tbl[i+1][1] - lcd_gamma_tbl[i][1]) * j)/num;
  313. 			info->lcd_gamma_tbl[lcd_gamma_tbl[i][0] + j] = (value<<16) + (value<<8) + value;
  314. 		}
  315. 	}
  316. 	info->lcd_gamma_tbl[255] = (lcd_gamma_tbl[items-1][1]<<16) + (lcd_gamma_tbl[items-1][1]<<8) + lcd_gamma_tbl[items-1][1];
  317.  
  318. 	memcpy(info->lcd_cmap_tbl, lcd_cmap_tbl, sizeof(lcd_cmap_tbl));
  319. 	printf("[disp]lcd720:%s\r\n",__func__);
  320.  
  321. }
  322.  
  323. static s32 LCD_open_flow(u32 sel)
  324. {
  325. 	printf("[disp]lcd720:%s\r\n",__func__);
  326. 	LCD_OPEN_FUNC(sel, LCD_power_on, 120);   //open lcd power, and delay 50ms
  327. 	LCD_OPEN_FUNC(sel, LCD_panel_init, 1);   //open lcd power, than delay 200ms
  328. 	LCD_OPEN_FUNC(sel, sunxi_lcd_tcon_enable, 5);     //open lcd controller, and delay 100ms
  329. 	LCD_OPEN_FUNC(sel, LCD_bl_open, 0);     //open lcd backlight, and delay 0ms
  330.  
  331. 	return 0;
  332. }
  333.  
  334. static s32 LCD_close_flow(u32 sel)
  335. {
  336. 	printf("[disp]lcd720:%s\r\n",__func__);
  337. 	LCD_CLOSE_FUNC(sel, LCD_bl_close, 0);       //close lcd backlight, and delay 0ms
  338. 	LCD_CLOSE_FUNC(sel, sunxi_lcd_tcon_disable, 1);         //close lcd controller, and delay 0ms
  339. 	LCD_CLOSE_FUNC(sel, LCD_panel_exit,	10);   //open lcd power, than delay 200ms
  340. 	LCD_CLOSE_FUNC(sel, LCD_power_off, 0);   //close lcd power, and delay 500ms
  341.  
  342. 	return 0;
  343. }
  344.  
  345. static void LCD_power_on(u32 sel)
  346. {
  347. 	/* set lcd-rst to 0 */
  348. 	panel_reset(0);
  349. 	/* vcc18-lcd */
  350. 	sunxi_lcd_power_enable(sel, 0);
  351. 	sunxi_lcd_delay_ms(50);
  352.  
  353. 	/* vcc33-lcd */
  354. 	sunxi_lcd_power_enable(sel, 1);
  355. 	sunxi_lcd_delay_ms(100);
  356.  
  357. 	sunxi_lcd_pin_cfg(sel, 1);
  358. 	sunxi_lcd_delay_ms(20);
  359.  
  360. 	panel_reset(1);
  361. 	sunxi_lcd_delay_ms(50);
  362. 	panel_reset(0);
  363. 	sunxi_lcd_delay_ms(35);
  364. 	panel_reset(1);
  365. 	sunxi_lcd_delay_ms(50);
  366. }
  367.  
  368. static void LCD_power_off(u32 sel)
  369. {
  370. 	printf("[disp]lcd720:%s\r\n",__func__);
  371. 	sunxi_lcd_delay_ms(20);
  372. 	panel_reset(0);
  373. 	sunxi_lcd_delay_ms(5);
  374. 	power_en(0);
  375. 	sunxi_lcd_delay_ms(10);
  376.  
  377. 	sunxi_lcd_power_disable(sel, 1);
  378. 	sunxi_lcd_delay_ms(5);
  379. 	sunxi_lcd_power_disable(sel, 0);
  380. 	sunxi_lcd_pin_cfg(sel, 0);
  381. }
  382.  
  383. static void LCD_bl_open(u32 sel)
  384. {
  385. 	printf("[disp]lcd720:%s\r\n",__func__);
  386. 	sunxi_lcd_backlight_enable(sel);//config lcd_bl_en pin to open lcd backlight
  387. 	sunxi_lcd_pwm_enable(sel);
  388. }
  389.  
  390. static void LCD_bl_close(u32 sel)
  391. {
  392. 	printf("[disp]lcd720:%s\r\n",__func__);
  393. 	sunxi_lcd_backlight_disable(sel);//config lcd_bl_en pin to close lcd backlight
  394. }
  395.  
  396. static void LCD_panel_init(u32 sel)
  397. {
  398. 	u32 i = 0;
  399. 	printf("[disp]lcd720:%s\r\n",__func__);
  400.  
  401. 	sunxi_lcd_dsi_clk_enable(sel);
  402. 	sunxi_lcd_delay_ms(10);
  403.  
  404.         //sunxi_lcd_pin_cfg(sel, 1);
  405.         //sunxi_lcd_delay_ms(20);
  406.  
  407.         //panel_reset(1);
  408.         //sunxi_lcd_delay_ms(50);
  409.         //panel_reset(0);
  410.         //sunxi_lcd_delay_ms(35);
  411.         //panel_reset(1);
  412.         //sunxi_lcd_delay_ms(50);
  413.  
  414.  
  415. 	for (i = 0;; i++) {
  416. 		if (lcm_initialization_setting[i].cmd == REGFLAG_END_OF_TABLE)
  417. 			break;
  418. 		else if (lcm_initialization_setting[i].cmd == REGFLAG_DELAY)
  419. 			sunxi_lcd_delay_ms(lcm_initialization_setting[i].count);
  420. 		else {
  421. 			dsi_dcs_wr(0, lcm_initialization_setting[i].cmd,
  422. 				   lcm_initialization_setting[i].para_list,
  423. 				   lcm_initialization_setting[i].count);
  424. 		}
  425. 	}
  426.         //sunxi_lcd_dsi_clk_enable(sel);
  427.         //sunxi_lcd_delay_ms(10);
  428.  
  429.  
  430. 	return;
  431. }
  432.  
  433. static void LCD_panel_exit(u32 sel)
  434. {
  435. 	printf("[disp]lcd720:%s\r\n",__func__);
  436. 	sunxi_lcd_dsi_dcs_write_0para(sel,DSI_DCS_SET_DISPLAY_OFF);
  437. 	sunxi_lcd_delay_ms(50);
  438. 	sunxi_lcd_dsi_dcs_write_0para(sel,DSI_DCS_ENTER_SLEEP_MODE);
  439. 	sunxi_lcd_delay_ms(20);
  440.  
  441. 	return ;
  442. }
  443.  
  444. //sel: 0:lcd0; 1:lcd1
  445. static s32 LCD_user_defined_func(u32 sel, u32 para1, u32 para2, u32 para3)
  446. {
  447. 	printf("[disp]lcd720:%s\r\n",__func__);
  448. 	return 0;
  449. }
  450.  
  451. __lcd_panel_t tft720x1280_panel = {
  452. 	/* panel driver name, must mach the name of lcd_drv_name in sys_config.fex */
  453. 	.name = "tft720x1280",
  454. 	.func = {
  455. 		.cfg_panel_info = LCD_cfg_panel_info,
  456. 		.cfg_open_flow = LCD_open_flow,
  457. 		.cfg_close_flow = LCD_close_flow,
  458. 		.lcd_user_defined_func = LCD_user_defined_func,
  459. 	},
  460. };

第四步  配置触摸

  1. [ctp]
  2. compatible          = "allwinner,sun50i-ctp-para"
  3. ctp_used            = 1
  4. ctp_name         = "gt9xx_ts"            ;根据使用触摸芯片选择对应驱动，我这里用的是gt927
  5. ctp_twi_id          = 4                         ;根据原理图确认使用的那组twi，我这里用的twi4
  6. ctp_twi_addr        = 0x14                
  7. ctp_screen_max_x    = 800               ;根据屏幕手册填写
  8. ctp_screen_max_y    = 1280             ;根据屏幕手册填写
  9. ctp_touch_panel_max_x  = 800
  10. ctp_touch_panel_max_y  = 480
  11. ctp_revert_x_flag   = 0
  12. ctp_revert_y_flag   = 0
  13. ctp_exchange_x_y_flag = 0
  14. ctp_power_ldo       = "vcc-ctp"
  15. ctp_power_ldo_vol   = 3300
  16.  
  17. ctp_int_port        = port:PH09<6><default><default><default>       ;根据原理图和全志硬件手册进行填写
  18. ctp_wakeup          = port:PH10<1><default><default><0>               ;根据原理图和全志硬件手册进行填写
  19. [ctp_list]
  20. compatible          = "allwinner,sun50i-ctp-list"
  21. ctp_list_used        = 1                               ;使用ctp list
  22. ;ft5x_ts              = 1
  23. ;gt82x               = 1
  24. gt9xx_ts         = 1                                     ;对应驱动使能
  25.  
  26. ;根据原理图和全志硬件手册进行填写
  27. [twi4]
  28. twi4_used        = 1
  29. twi4_scl         = port:PI2<3><default><default><default>
  30. twi4_sda         = port:PI3<3><default><default><default>

第五步 其他说明或调试方法

1.查看显示信息

这是vsync 中断的次数，每加1 都代表刷新了一帧，正常来说是一秒60（期望的fps）次，重复cat sys，如果无变化，则异常。

这个里面的irq、vsync等信息，正常情况下是会一直变化的，如果一直不动，就要检查fex中的相关配置参数是否正确，我这边就是因为lcd_dsi_if参数配置错误，irq等信息都不会变化，现象就是一直黑屏，背光亮。

2.查看电源信息

可确认屏幕电源与触屏电源是否存在

3.设置默认横屏或者竖屏

方式一（可行）

vim device/softwinner/a40-OKA40i_C/a40_OKA40i_C.mk

PRODUCT_PROPERTY_OVERRIDES += \

    ro.sf.lcd_density=160 \

    ro.display.sdcard=1 \

    ro.part.sdcard=1 \

    ro.sf.rotation=90     //增加角度来旋转

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