root/drivers/staging/fbtft/fb_ili9481.c

DEFINITIONS

1. set_addr_win
2. set_var

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * FB driver for the ILI9481 LCD Controller
   4  *
   5  * Copyright (c) 2014 Petr Olivka
   6  * Copyright (c) 2013 Noralf Tronnes
   7  */
   8 
   9 #include <linux/module.h>
  10 #include <linux/kernel.h>
  11 #include <linux/init.h>
  12 #include <linux/delay.h>
  13 #include <video/mipi_display.h>
  14 
  15 #include "fbtft.h"
  16 
  17 #define DRVNAME "fb_ili9481"
  18 #define WIDTH           320
  19 #define HEIGHT          480
  20 
  21 static const s16 default_init_sequence[] = {
  22         /* SLP_OUT - Sleep out */
  23         -1, MIPI_DCS_EXIT_SLEEP_MODE,
  24         -2, 50,
  25         /* Power setting */
  26         -1, 0xD0, 0x07, 0x42, 0x18,
  27         /* VCOM */
  28         -1, 0xD1, 0x00, 0x07, 0x10,
  29         /* Power setting for norm. mode */
  30         -1, 0xD2, 0x01, 0x02,
  31         /* Panel driving setting */
  32         -1, 0xC0, 0x10, 0x3B, 0x00, 0x02, 0x11,
  33         /* Frame rate & inv. */
  34         -1, 0xC5, 0x03,
  35         /* Pixel format */
  36         -1, MIPI_DCS_SET_PIXEL_FORMAT, 0x55,
  37         /* Gamma */
  38         -1, 0xC8, 0x00, 0x32, 0x36, 0x45, 0x06, 0x16,
  39                   0x37, 0x75, 0x77, 0x54, 0x0C, 0x00,
  40         /* DISP_ON */
  41         -1, MIPI_DCS_SET_DISPLAY_ON,
  42         -3
  43 };
  44 
  45 static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
  46 {
  47         write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
  48                   xs >> 8, xs & 0xff, xe >> 8, xe & 0xff);
  49 
  50         write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
  51                   ys >> 8, ys & 0xff, ye >> 8, ye & 0xff);
  52 
  53         write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
  54 }
  55 
  56 #define HFLIP 0x01
  57 #define VFLIP 0x02
  58 #define ROW_X_COL 0x20
  59 static int set_var(struct fbtft_par *par)
  60 {
  61         switch (par->info->var.rotate) {
  62         case 270:
  63                 write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
  64                           ROW_X_COL | HFLIP | VFLIP | (par->bgr << 3));
  65                 break;
  66         case 180:
  67                 write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
  68                           VFLIP | (par->bgr << 3));
  69                 break;
  70         case 90:
  71                 write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
  72                           ROW_X_COL | (par->bgr << 3));
  73                 break;
  74         default:
  75                 write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
  76                           HFLIP | (par->bgr << 3));
  77                 break;
  78         }
  79 
  80         return 0;
  81 }
  82 
  83 static struct fbtft_display display = {
  84         .regwidth = 8,
  85         .width = WIDTH,
  86         .height = HEIGHT,
  87         .init_sequence = default_init_sequence,
  88         .fbtftops = {
  89                 .set_addr_win = set_addr_win,
  90                 .set_var = set_var,
  91         },
  92 };
  93 
  94 FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9481", &display);
  95 
  96 MODULE_ALIAS("spi:" DRVNAME);
  97 MODULE_ALIAS("platform:" DRVNAME);
  98 MODULE_ALIAS("spi:ili9481");
  99 MODULE_ALIAS("platform:ili9481");
 100 
 101 MODULE_DESCRIPTION("FB driver for the ILI9481 LCD Controller");
 102 MODULE_AUTHOR("Petr Olivka");
 103 MODULE_LICENSE("GPL");