2 * Copyright (C) 2012 Samsung Electronics
4 * Author: InKi Dae <inki.dae@samsung.com>
5 * Author: Donghwa Lee <dh09.lee@samsung.com>
7 * SPDX-License-Identifier: GPL-2.0+
16 #include <asm/arch/cpu.h>
17 #include <asm/arch/clock.h>
18 #include <asm/arch/clk.h>
19 #include <asm/arch/mipi_dsim.h>
20 #include <asm/arch/dp_info.h>
21 #include <asm/arch/system.h>
22 #include <asm-generic/errno.h>
24 #include "exynos_fb.h"
26 DECLARE_GLOBAL_DATA_PTR;
28 static unsigned int panel_width, panel_height;
31 * board_init_f(arch/arm/lib/board.c) calls lcd_setmem() which needs
32 * panel_info.vl_col, panel_info.vl_row and panel_info.vl_bpix to reserve
33 * FB memory at a very early stage, i.e even before exynos_fimd_parse_dt()
34 * is called. So, we are forced to statically assign it.
36 #ifdef CONFIG_OF_CONTROL
37 vidinfo_t panel_info = {
40 .vl_bpix = LCD_COLOR16,
44 static void exynos_lcd_init_mem(void *lcdbase, vidinfo_t *vid)
46 unsigned long palette_size;
49 fb_size = vid->vl_row * vid->vl_col * (NBITS(vid->vl_bpix) >> 3);
51 palette_size = NBITS(vid->vl_bpix) == 8 ? 256 : 16;
53 exynos_fimd_lcd_init_mem((unsigned long)lcdbase,
54 (unsigned long)fb_size, palette_size);
57 static void exynos_lcd_init(vidinfo_t *vid)
59 exynos_fimd_lcd_init(vid);
61 /* Enable flushing after LCD writes if requested */
62 lcd_set_flush_dcache(1);
65 void __exynos_cfg_lcd_gpio(void)
68 void exynos_cfg_lcd_gpio(void)
69 __attribute__((weak, alias("__exynos_cfg_lcd_gpio")));
71 void __exynos_backlight_on(unsigned int onoff)
74 void exynos_backlight_on(unsigned int onoff)
75 __attribute__((weak, alias("__exynos_cfg_lcd_gpio")));
77 void __exynos_reset_lcd(void)
80 void exynos_reset_lcd(void)
81 __attribute__((weak, alias("__exynos_reset_lcd")));
83 void __exynos_lcd_power_on(void)
86 void exynos_lcd_power_on(void)
87 __attribute__((weak, alias("__exynos_lcd_power_on")));
89 void __exynos_cfg_ldo(void)
92 void exynos_cfg_ldo(void)
93 __attribute__((weak, alias("__exynos_cfg_ldo")));
95 void __exynos_enable_ldo(unsigned int onoff)
98 void exynos_enable_ldo(unsigned int onoff)
99 __attribute__((weak, alias("__exynos_enable_ldo")));
101 void __exynos_backlight_reset(void)
104 void exynos_backlight_reset(void)
105 __attribute__((weak, alias("__exynos_backlight_reset")));
107 static void lcd_panel_on(vidinfo_t *vid)
109 udelay(vid->init_delay);
111 exynos_backlight_reset();
113 exynos_cfg_lcd_gpio();
115 exynos_lcd_power_on();
117 udelay(vid->power_on_delay);
124 udelay(vid->reset_delay);
126 exynos_backlight_on(1);
130 exynos_enable_ldo(1);
132 if (vid->mipi_enabled)
133 exynos_mipi_dsi_init();
136 #ifdef CONFIG_OF_CONTROL
137 int exynos_fimd_parse_dt(const void *blob)
140 node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS_FIMD);
142 debug("exynos_fb: Can't get device node for fimd\n");
146 panel_info.vl_col = fdtdec_get_int(blob, node, "samsung,vl-col", 0);
147 if (panel_info.vl_col == 0) {
148 debug("Can't get XRES\n");
152 panel_info.vl_row = fdtdec_get_int(blob, node, "samsung,vl-row", 0);
153 if (panel_info.vl_row == 0) {
154 debug("Can't get YRES\n");
158 panel_info.vl_width = fdtdec_get_int(blob, node,
159 "samsung,vl-width", 0);
161 panel_info.vl_height = fdtdec_get_int(blob, node,
162 "samsung,vl-height", 0);
164 panel_info.vl_freq = fdtdec_get_int(blob, node, "samsung,vl-freq", 0);
165 if (panel_info.vl_freq == 0) {
166 debug("Can't get refresh rate\n");
170 if (fdtdec_get_bool(blob, node, "samsung,vl-clkp"))
171 panel_info.vl_clkp = CONFIG_SYS_LOW;
173 if (fdtdec_get_bool(blob, node, "samsung,vl-oep"))
174 panel_info.vl_oep = CONFIG_SYS_LOW;
176 if (fdtdec_get_bool(blob, node, "samsung,vl-hsp"))
177 panel_info.vl_hsp = CONFIG_SYS_LOW;
179 if (fdtdec_get_bool(blob, node, "samsung,vl-vsp"))
180 panel_info.vl_vsp = CONFIG_SYS_LOW;
182 if (fdtdec_get_bool(blob, node, "samsung,vl-dp"))
183 panel_info.vl_dp = CONFIG_SYS_LOW;
185 panel_info.vl_bpix = fdtdec_get_int(blob, node, "samsung,vl-bpix", 0);
186 if (panel_info.vl_bpix == 0) {
187 debug("Can't get bits per pixel\n");
191 panel_info.vl_hspw = fdtdec_get_int(blob, node, "samsung,vl-hspw", 0);
192 if (panel_info.vl_hspw == 0) {
193 debug("Can't get hsync width\n");
197 panel_info.vl_hfpd = fdtdec_get_int(blob, node, "samsung,vl-hfpd", 0);
198 if (panel_info.vl_hfpd == 0) {
199 debug("Can't get right margin\n");
203 panel_info.vl_hbpd = (u_char)fdtdec_get_int(blob, node,
204 "samsung,vl-hbpd", 0);
205 if (panel_info.vl_hbpd == 0) {
206 debug("Can't get left margin\n");
210 panel_info.vl_vspw = (u_char)fdtdec_get_int(blob, node,
211 "samsung,vl-vspw", 0);
212 if (panel_info.vl_vspw == 0) {
213 debug("Can't get vsync width\n");
217 panel_info.vl_vfpd = fdtdec_get_int(blob, node,
218 "samsung,vl-vfpd", 0);
219 if (panel_info.vl_vfpd == 0) {
220 debug("Can't get lower margin\n");
224 panel_info.vl_vbpd = fdtdec_get_int(blob, node, "samsung,vl-vbpd", 0);
225 if (panel_info.vl_vbpd == 0) {
226 debug("Can't get upper margin\n");
230 panel_info.vl_cmd_allow_len = fdtdec_get_int(blob, node,
231 "samsung,vl-cmd-allow-len", 0);
233 panel_info.win_id = fdtdec_get_int(blob, node, "samsung,winid", 0);
234 panel_info.init_delay = fdtdec_get_int(blob, node,
235 "samsung,init-delay", 0);
236 panel_info.power_on_delay = fdtdec_get_int(blob, node,
237 "samsung,power-on-delay", 0);
238 panel_info.reset_delay = fdtdec_get_int(blob, node,
239 "samsung,reset-delay", 0);
240 panel_info.interface_mode = fdtdec_get_int(blob, node,
241 "samsung,interface-mode", 0);
242 panel_info.mipi_enabled = fdtdec_get_int(blob, node,
243 "samsung,mipi-enabled", 0);
244 panel_info.dp_enabled = fdtdec_get_int(blob, node,
245 "samsung,dp-enabled", 0);
246 panel_info.cs_setup = fdtdec_get_int(blob, node,
247 "samsung,cs-setup", 0);
248 panel_info.wr_setup = fdtdec_get_int(blob, node,
249 "samsung,wr-setup", 0);
250 panel_info.wr_act = fdtdec_get_int(blob, node, "samsung,wr-act", 0);
251 panel_info.wr_hold = fdtdec_get_int(blob, node, "samsung,wr-hold", 0);
253 panel_info.logo_on = fdtdec_get_int(blob, node, "samsung,logo-on", 0);
254 if (panel_info.logo_on) {
255 panel_info.logo_width = fdtdec_get_int(blob, node,
256 "samsung,logo-width", 0);
257 panel_info.logo_height = fdtdec_get_int(blob, node,
258 "samsung,logo-height", 0);
259 panel_info.logo_addr = fdtdec_get_int(blob, node,
260 "samsung,logo-addr", 0);
263 panel_info.rgb_mode = fdtdec_get_int(blob, node,
264 "samsung,rgb-mode", 0);
265 panel_info.pclk_name = fdtdec_get_int(blob, node,
266 "samsung,pclk-name", 0);
267 panel_info.sclk_div = fdtdec_get_int(blob, node,
268 "samsung,sclk-div", 0);
269 panel_info.dual_lcd_enabled = fdtdec_get_int(blob, node,
270 "samsung,dual-lcd-enabled", 0);
276 void lcd_ctrl_init(void *lcdbase)
278 set_system_display_ctrl();
281 #ifdef CONFIG_OF_CONTROL
282 if (exynos_fimd_parse_dt(gd->fdt_blob))
283 debug("Can't get proper panel info\n");
285 /* initialize parameters which is specific to panel. */
286 init_panel_info(&panel_info);
288 panel_width = panel_info.vl_width;
289 panel_height = panel_info.vl_height;
291 exynos_lcd_init_mem(lcdbase, &panel_info);
293 exynos_lcd_init(&panel_info);
296 void lcd_enable(void)
298 if (panel_info.logo_on) {
299 memset((void *) gd->fb_base, 0, panel_width * panel_height *
300 (NBITS(panel_info.vl_bpix) >> 3));
303 lcd_panel_on(&panel_info);
307 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)