1 // SPDX-License-Identifier: GPL-2.0+
3 * FB driver for the HX8353D LCD Controller
5 * Copyright (c) 2014 Petr Olivka
6 * Copyright (c) 2013 Noralf Tronnes
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>
17 #define DRVNAME "fb_hx8353d"
18 #define DEFAULT_GAMMA "50 77 40 08 BF 00 03 0F 00 01 73 00 72 03 B0 0F 08 00 0F"
20 static int init_display(struct fbtft_par *par)
22 par->fbtftops.reset(par);
26 write_reg(par, 0xB9, 0xFF, 0x83, 0x53);
29 write_reg(par, 0xB0, 0x3C, 0x01);
32 write_reg(par, 0xB6, 0x94, 0x6C, 0x50);
35 write_reg(par, 0xB1, 0x00, 0x01, 0x1B, 0x03, 0x01, 0x08, 0x77, 0x89);
38 write_reg(par, 0x3A, 0x05);
41 write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0xC0);
43 /* SLPOUT - Sleep out & booster on */
44 write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE);
47 /* DISPON - Display On */
48 write_reg(par, MIPI_DCS_SET_DISPLAY_ON);
51 write_reg(par, MIPI_DCS_WRITE_LUT,
52 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30,
53 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62,
54 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
55 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
56 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
57 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
58 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30,
59 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62);
64 static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
67 write_reg(par, 0x2a, xs >> 8, xs & 0xff, xe >> 8, xe & 0xff);
70 write_reg(par, 0x2b, ys >> 8, ys & 0xff, ye >> 8, ye & 0xff);
79 static int set_var(struct fbtft_par *par)
82 * madctl - memory data access control
84 * 1. mode selection pin srgb
85 * rgb h/w pin for color filter setting: 0=rgb, 1=bgr
87 * rgb-bgr order color filter panel: 0=rgb, 1=bgr
89 switch (par->info->var.rotate) {
91 write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
92 mx | my | (par->bgr << 3));
95 write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
96 my | mv | (par->bgr << 3));
99 write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
103 write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
104 mx | mv | (par->bgr << 3));
111 /* gamma string format: */
112 static int set_gamma(struct fbtft_par *par, u32 *curves)
115 curves[0], curves[1], curves[2], curves[3],
116 curves[4], curves[5], curves[6], curves[7],
117 curves[8], curves[9], curves[10], curves[11],
118 curves[12], curves[13], curves[14], curves[15],
119 curves[16], curves[17], curves[18]);
124 static struct fbtft_display display = {
130 .gamma = DEFAULT_GAMMA,
132 .init_display = init_display,
133 .set_addr_win = set_addr_win,
135 .set_gamma = set_gamma,
139 FBTFT_REGISTER_DRIVER(DRVNAME, "himax,hx8353d", &display);
141 MODULE_ALIAS("spi:" DRVNAME);
142 MODULE_ALIAS("platform:" DRVNAME);
143 MODULE_ALIAS("spi:hx8353d");
144 MODULE_ALIAS("platform:hx8353d");
146 MODULE_DESCRIPTION("FB driver for the HX8353D LCD Controller");
147 MODULE_AUTHOR("Petr Olivka");
148 MODULE_LICENSE("GPL");