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Diffstat (limited to 'board/cm_t35/display.c')
| -rw-r--r-- | board/cm_t35/display.c | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/board/cm_t35/display.c b/board/cm_t35/display.c new file mode 100644 index 000000000..43f06282d --- /dev/null +++ b/board/cm_t35/display.c @@ -0,0 +1,220 @@ +/* + * (C) Copyright 2012 CompuLab, Ltd. <www.compulab.co.il> + * + * Authors: Nikita Kiryanov <nikita@compulab.co.il> + * + * 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 <common.h> +#include <asm/gpio.h> +#include <asm/io.h> +#include <stdio_dev.h> +#include <asm/arch/dss.h> +#include <lcd.h> +#include <asm/arch-omap3/dss.h> + +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) {} |