/* * (C) Copyright 2012 CompuLab, Ltd. * * Authors: Nikita Kiryanov * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc. */ #include #include #include #include #include #include #include DECLARE_GLOBAL_DATA_PTR; enum display_type { NONE, DVI, }; #define CMAP_ADDR 0x80100000 /* * The frame buffer is allocated before we have the chance to parse user input. * To make sure enough memory is allocated for all resolutions, we define * vl_{col | row} to the maximal resolution supported by OMAP3. */ vidinfo_t panel_info = { .vl_col = 1400, .vl_row = 1050, .vl_bpix = LCD_BPP, .cmap = (ushort *)CMAP_ADDR, }; static struct panel_config panel_cfg; static enum display_type lcd_def; /* * A note on DVI presets; * U-Boot can convert 8 bit BMP data to 16 bit BMP data, and OMAP DSS can * convert 16 bit data into 24 bit data. Thus, GFXFORMAT_RGB16 allows us to * support two BMP types with one setting. */ static const struct panel_config preset_dvi_640X480 = { .lcd_size = PANEL_LCD_SIZE(640, 480), .timing_h = DSS_HBP(48) | DSS_HFP(16) | DSS_HSW(96), .timing_v = DSS_VBP(33) | DSS_VFP(10) | DSS_VSW(2), .divisor = 12 | (1 << 16), .data_lines = LCD_INTERFACE_24_BIT, .panel_type = ACTIVE_DISPLAY, .load_mode = 2, .gfx_format = GFXFORMAT_RGB16, }; static const struct panel_config preset_dvi_800X600 = { .lcd_size = PANEL_LCD_SIZE(800, 600), .timing_h = DSS_HBP(88) | DSS_HFP(40) | DSS_HSW(128), .timing_v = DSS_VBP(23) | DSS_VFP(1) | DSS_VSW(4), .divisor = 8 | (1 << 16), .data_lines = LCD_INTERFACE_24_BIT, .panel_type = ACTIVE_DISPLAY, .load_mode = 2, .gfx_format = GFXFORMAT_RGB16, }; static const struct panel_config preset_dvi_1024X768 = { .lcd_size = PANEL_LCD_SIZE(1024, 768), .timing_h = DSS_HBP(160) | DSS_HFP(24) | DSS_HSW(136), .timing_v = DSS_VBP(29) | DSS_VFP(3) | DSS_VSW(6), .divisor = 5 | (1 << 16), .data_lines = LCD_INTERFACE_24_BIT, .panel_type = ACTIVE_DISPLAY, .load_mode = 2, .gfx_format = GFXFORMAT_RGB16, }; static const struct panel_config preset_dvi_1152X864 = { .lcd_size = PANEL_LCD_SIZE(1152, 864), .timing_h = DSS_HBP(256) | DSS_HFP(64) | DSS_HSW(128), .timing_v = DSS_VBP(32) | DSS_VFP(1) | DSS_VSW(3), .divisor = 3 | (1 << 16), .data_lines = LCD_INTERFACE_24_BIT, .panel_type = ACTIVE_DISPLAY, .load_mode = 2, .gfx_format = GFXFORMAT_RGB16, }; static const struct panel_config preset_dvi_1280X960 = { .lcd_size = PANEL_LCD_SIZE(1280, 960), .timing_h = DSS_HBP(312) | DSS_HFP(96) | DSS_HSW(112), .timing_v = DSS_VBP(36) | DSS_VFP(1) | DSS_VSW(3), .divisor = 3 | (1 << 16), .data_lines = LCD_INTERFACE_24_BIT, .panel_type = ACTIVE_DISPLAY, .load_mode = 2, .gfx_format = GFXFORMAT_RGB16, }; static const struct panel_config preset_dvi_1280X1024 = { .lcd_size = PANEL_LCD_SIZE(1280, 1024), .timing_h = DSS_HBP(248) | DSS_HFP(48) | DSS_HSW(112), .timing_v = DSS_VBP(38) | DSS_VFP(1) | DSS_VSW(3), .divisor = 3 | (1 << 16), .data_lines = LCD_INTERFACE_24_BIT, .panel_type = ACTIVE_DISPLAY, .load_mode = 2, .gfx_format = GFXFORMAT_RGB16, }; /* * set_resolution_params() * * Due to usage of multiple display related APIs resolution data is located in * more than one place. This function updates them all. */ static void set_resolution_params(int x, int y) { panel_cfg.lcd_size = PANEL_LCD_SIZE(x, y); panel_info.vl_col = x; panel_info.vl_row = y; lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8; } static void set_preset(const struct panel_config preset, int x_res, int y_res) { panel_cfg = preset; set_resolution_params(x_res, y_res); } static enum display_type set_dvi_preset(const struct panel_config preset, int x_res, int y_res) { set_preset(preset, x_res, y_res); return DVI; } /* * env_parse_displaytype() - parse display type. * * Parses the environment variable "displaytype", which contains the * name of the display type or preset, in which case it applies its * configurations. * * Returns the type of display that was specified. */ static enum display_type env_parse_displaytype(char *displaytype) { if (!strncmp(displaytype, "dvi640x480", 10)) return set_dvi_preset(preset_dvi_640X480, 640, 480); else if (!strncmp(displaytype, "dvi800x600", 10)) return set_dvi_preset(preset_dvi_800X600, 800, 600); else if (!strncmp(displaytype, "dvi1024x768", 11)) return set_dvi_preset(preset_dvi_1024X768, 1024, 768); else if (!strncmp(displaytype, "dvi1152x864", 11)) return set_dvi_preset(preset_dvi_1152X864, 1152, 864); else if (!strncmp(displaytype, "dvi1280x960", 11)) return set_dvi_preset(preset_dvi_1280X960, 1280, 960); else if (!strncmp(displaytype, "dvi1280x1024", 12)) return set_dvi_preset(preset_dvi_1280X1024, 1280, 1024); return NONE; } int lcd_line_length; int lcd_color_fg; int lcd_color_bg; void *lcd_base; short console_col; short console_row; void *lcd_console_address; void lcd_ctrl_init(void *lcdbase) { struct prcm *prcm = (struct prcm *)PRCM_BASE; char *displaytype = getenv("displaytype"); if (displaytype == NULL) return; lcd_def = env_parse_displaytype(displaytype); if (lcd_def == NONE) return; panel_cfg.frame_buffer = lcdbase; omap3_dss_panel_config(&panel_cfg); /* * Pixel clock is defined with many divisions and only few * multiplications of the system clock. Since DSS FCLK divisor is set * to 16 by default, we need to set it to a smaller value, like 3 * (chosen via trial and error). */ clrsetbits_le32(&prcm->clksel_dss, 0xF, 3); } void lcd_enable(void) { if (lcd_def == DVI) { gpio_direction_output(54, 0); /* Turn on DVI */ omap3_dss_enable(); } } void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue) {}