u-boot/board/compulab/common/omap3_display.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

451 lines
12 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2012 - 2013 CompuLab, Ltd. <www.compulab.co.il>
*
* Authors: Nikita Kiryanov <nikita@compulab.co.il>
*
* Parsing code based on linux/drivers/video/pxafb.c
*/
#include <common.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <stdio_dev.h>
#include <asm/arch/dss.h>
#include <lcd.h>
#include <scf0403_lcd.h>
#include <asm/arch-omap3/dss.h>
enum display_type {
NONE,
DVI,
DVI_CUSTOM,
DATA_IMAGE, /* #define CONFIG_SCF0403_LCD to use */
};
#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),
.pol_freq = DSS_IHS | DSS_IVS | DSS_IPC,
.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),
.pol_freq = DSS_IHS | DSS_IVS | DSS_IPC,
.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),
.pol_freq = DSS_IHS | DSS_IVS | DSS_IPC,
.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),
.pol_freq = DSS_IHS | DSS_IVS | DSS_IPC,
.divisor = 4 | (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),
.pol_freq = DSS_IHS | DSS_IVS | DSS_IPC,
.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),
.pol_freq = DSS_IHS | DSS_IVS | DSS_IPC,
.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_dataimage_480X800 = {
.lcd_size = PANEL_LCD_SIZE(480, 800),
.timing_h = DSS_HBP(2) | DSS_HFP(2) | DSS_HSW(2),
.timing_v = DSS_VBP(17) | DSS_VFP(20) | DSS_VSW(3),
.pol_freq = DSS_IVS | DSS_IHS | DSS_IPC | DSS_ONOFF,
.divisor = 10 | (1 << 10),
.data_lines = LCD_INTERFACE_18_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;
}
static enum display_type set_dataimage_preset(const struct panel_config preset,
int x_res, int y_res)
{
set_preset(preset, x_res, y_res);
return DATA_IMAGE;
}
/*
* parse_mode() - parse the mode parameter of custom lcd settings
*
* @mode: <res_x>x<res_y>
*
* Returns -1 on error, 0 on success.
*/
static int parse_mode(const char *mode)
{
unsigned int modelen = strlen(mode);
int res_specified = 0;
unsigned int xres = 0, yres = 0;
int yres_specified = 0;
int i;
for (i = modelen - 1; i >= 0; i--) {
switch (mode[i]) {
case 'x':
if (!yres_specified) {
yres = simple_strtoul(&mode[i + 1], NULL, 0);
yres_specified = 1;
} else {
goto done_parsing;
}
break;
case '0' ... '9':
break;
default:
goto done_parsing;
}
}
if (i < 0 && yres_specified) {
xres = simple_strtoul(mode, NULL, 0);
res_specified = 1;
}
done_parsing:
if (res_specified) {
set_resolution_params(xres, yres);
} else {
printf("LCD: invalid mode: %s\n", mode);
return -1;
}
return 0;
}
#define PIXEL_CLK_NUMERATOR (26 * 432 / 39)
/*
* parse_pixclock() - Parse the pixclock parameter of custom lcd settings
*
* @pixclock: the desired pixel clock
*
* Returns -1 on error, 0 on success.
*
* Handling the pixel_clock:
*
* Pixel clock is defined in the OMAP35x TRM as follows:
* pixel_clock =
* (SYS_CLK * 2 * PRCM.CM_CLKSEL2_PLL[18:8]) /
* (DSS.DISPC_DIVISOR[23:16] * DSS.DISPC_DIVISOR[6:0] *
* PRCM.CM_CLKSEL_DSS[4:0] * (PRCM.CM_CLKSEL2_PLL[6:0] + 1))
*
* In practice, this means that in order to set the
* divisor for the desired pixel clock one needs to
* solve the following equation:
*
* 26 * 432 / (39 * <pixel_clock>) = DSS.DISPC_DIVISOR[6:0]
*
* NOTE: the explicit equation above is reduced. Do not
* try to infer anything from these numbers.
*/
static int parse_pixclock(char *pixclock)
{
int divisor, pixclock_val;
char *pixclk_start = pixclock;
pixclock_val = simple_strtoul(pixclock, &pixclock, 10);
divisor = DIV_ROUND_UP(PIXEL_CLK_NUMERATOR, pixclock_val);
/* 0 and 1 are illegal values for PCD */
if (divisor <= 1)
divisor = 2;
panel_cfg.divisor = divisor | (1 << 16);
if (pixclock[0] != '\0') {
printf("LCD: invalid value for pixclock:%s\n", pixclk_start);
return -1;
}
return 0;
}
/*
* parse_setting() - parse a single setting of custom lcd parameters
*
* @setting: The custom lcd setting <name>:<value>
*
* Returns -1 on failure, 0 on success.
*/
static int parse_setting(char *setting)
{
int num_val;
char *setting_start = setting;
if (!strncmp(setting, "mode:", 5)) {
return parse_mode(setting + 5);
} else if (!strncmp(setting, "pixclock:", 9)) {
return parse_pixclock(setting + 9);
} else if (!strncmp(setting, "left:", 5)) {
num_val = simple_strtoul(setting + 5, &setting, 0);
panel_cfg.timing_h |= DSS_HBP(num_val);
} else if (!strncmp(setting, "right:", 6)) {
num_val = simple_strtoul(setting + 6, &setting, 0);
panel_cfg.timing_h |= DSS_HFP(num_val);
} else if (!strncmp(setting, "upper:", 6)) {
num_val = simple_strtoul(setting + 6, &setting, 0);
panel_cfg.timing_v |= DSS_VBP(num_val);
} else if (!strncmp(setting, "lower:", 6)) {
num_val = simple_strtoul(setting + 6, &setting, 0);
panel_cfg.timing_v |= DSS_VFP(num_val);
} else if (!strncmp(setting, "hsynclen:", 9)) {
num_val = simple_strtoul(setting + 9, &setting, 0);
panel_cfg.timing_h |= DSS_HSW(num_val);
} else if (!strncmp(setting, "vsynclen:", 9)) {
num_val = simple_strtoul(setting + 9, &setting, 0);
panel_cfg.timing_v |= DSS_VSW(num_val);
} else if (!strncmp(setting, "hsync:", 6)) {
if (simple_strtoul(setting + 6, &setting, 0) == 0)
panel_cfg.pol_freq |= DSS_IHS;
else
panel_cfg.pol_freq &= ~DSS_IHS;
} else if (!strncmp(setting, "vsync:", 6)) {
if (simple_strtoul(setting + 6, &setting, 0) == 0)
panel_cfg.pol_freq |= DSS_IVS;
else
panel_cfg.pol_freq &= ~DSS_IVS;
} else if (!strncmp(setting, "outputen:", 9)) {
if (simple_strtoul(setting + 9, &setting, 0) == 0)
panel_cfg.pol_freq |= DSS_IEO;
else
panel_cfg.pol_freq &= ~DSS_IEO;
} else if (!strncmp(setting, "pixclockpol:", 12)) {
if (simple_strtoul(setting + 12, &setting, 0) == 0)
panel_cfg.pol_freq |= DSS_IPC;
else
panel_cfg.pol_freq &= ~DSS_IPC;
} else if (!strncmp(setting, "active", 6)) {
panel_cfg.panel_type = ACTIVE_DISPLAY;
return 0; /* Avoid sanity check below */
} else if (!strncmp(setting, "passive", 7)) {
panel_cfg.panel_type = PASSIVE_DISPLAY;
return 0; /* Avoid sanity check below */
} else if (!strncmp(setting, "display:", 8)) {
if (!strncmp(setting + 8, "dvi", 3)) {
lcd_def = DVI_CUSTOM;
return 0; /* Avoid sanity check below */
}
} else {
printf("LCD: unknown option %s\n", setting_start);
return -1;
}
if (setting[0] != '\0') {
printf("LCD: invalid value for %s\n", setting_start);
return -1;
}
return 0;
}
/*
* env_parse_customlcd() - parse custom lcd params from an environment variable.
*
* @custom_lcd_params: The environment variable containing the lcd params.
*
* Returns -1 on failure, 0 on success.
*/
static int parse_customlcd(char *custom_lcd_params)
{
char params_cpy[160];
char *setting;
strncpy(params_cpy, custom_lcd_params, 160);
setting = strtok(params_cpy, ",");
while (setting) {
if (parse_setting(setting) < 0)
return -1;
setting = strtok(NULL, ",");
}
/* Currently we don't support changing this via custom lcd params */
panel_cfg.data_lines = LCD_INTERFACE_24_BIT;
panel_cfg.gfx_format = GFXFORMAT_RGB16; /* See dvi predefines note */
return 0;
}
/*
* 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);
else if (!strncmp(displaytype, "dataimage480x800", 16))
return set_dataimage_preset(preset_dataimage_480X800, 480, 800);
return NONE;
}
void lcd_ctrl_init(void *lcdbase)
{
struct prcm *prcm = (struct prcm *)PRCM_BASE;
char *custom_lcd;
char *displaytype = env_get("displaytype");
if (displaytype == NULL)
return;
lcd_def = env_parse_displaytype(displaytype);
/* If we did not recognize the preset, check if it's an env variable */
if (lcd_def == NONE) {
custom_lcd = env_get(displaytype);
if (custom_lcd == NULL || parse_customlcd(custom_lcd) < 0)
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);
}
#ifdef CONFIG_SCF0403_LCD
static void scf0403_enable(void)
{
gpio_direction_output(58, 1);
scf0403_init(157);
}
#else
static inline void scf0403_enable(void) {}
#endif
void lcd_enable(void)
{
switch (lcd_def) {
case NONE:
return;
case DVI:
case DVI_CUSTOM:
gpio_direction_output(54, 0); /* Turn on DVI */
break;
case DATA_IMAGE:
scf0403_enable();
break;
}
omap3_dss_enable();
}
void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue) {}