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sunxi: video: Add lcd output support

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Add lcd output support, see the new Kconfig entries and doc/README.video for
how to enable / configure this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
This commit is contained in:
Hans de Goede
2014-12-21 16:28:32 +01:00
parent e84007933a
commit 2dae800f1e
5 changed files with 278 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

180
drivers/video/sunxi_display.c
View File

@@ -11,7 +11,9 @@
#include <asm/arch/clock.h>
#include <asm/arch/display.h>
#include <asm/arch/gpio.h>
#include <asm/global_data.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <errno.h>
#include <fdtdec.h>
@@ -34,6 +36,7 @@ struct sunxi_display {
GraphicDevice graphic_device;
bool enabled;
enum sunxi_monitor monitor;
unsigned int depth;
} sunxi_display;
/*
@@ -435,6 +438,134 @@ static void sunxi_lcdc_enable(void)
setbits_le32(&lcdc->ctrl, SUNXI_LCDC_CTRL_TCON_ENABLE);
}
static void sunxi_lcdc_panel_enable(void)
{
int pin;
/*
* Start with backlight disabled to avoid the screen flashing to
* white while the lcd inits.
*/
pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_BL_EN);
if (pin != -1) {
gpio_request(pin, "lcd_backlight_enable");
gpio_direction_output(pin, 0);
}
pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_BL_PWM);
if (pin != -1) {
gpio_request(pin, "lcd_backlight_pwm");
/* backlight pwm is inverted, set to 1 to disable backlight */
gpio_direction_output(pin, 1);
}
/* Give the backlight some time to turn off and power up the panel. */
mdelay(40);
pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_POWER);
if (pin != -1) {
gpio_request(pin, "lcd_power");
gpio_direction_output(pin, 1);
}
}
static void sunxi_lcdc_backlight_enable(void)
{
int pin;
/*
* We want to have scanned out at least one frame before enabling the
* backlight to avoid the screen flashing to white when we enable it.
*/
mdelay(40);
pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_BL_EN);
if (pin != -1)
gpio_direction_output(pin, 1);
pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_BL_PWM);
if (pin != -1) {
/* backlight pwm is inverted, set to 0 to enable backlight */
gpio_direction_output(pin, 0);
}
}
static int sunxi_lcdc_get_clk_delay(const struct ctfb_res_modes *mode)
{
int delay;
delay = mode->lower_margin + mode->vsync_len + mode->upper_margin - 2;
return (delay > 30) ? 30 : delay;
}
static void sunxi_lcdc_tcon0_mode_set(const struct ctfb_res_modes *mode)
{
struct sunxi_lcdc_reg * const lcdc =
(struct sunxi_lcdc_reg *)SUNXI_LCD0_BASE;
int bp, clk_delay, clk_div, clk_double, pin, total, val;
for (pin = SUNXI_GPD(0); pin <= SUNXI_GPD(27); pin++)
sunxi_gpio_set_cfgpin(pin, SUNXI_GPD0_LCD0);
sunxi_lcdc_pll_set(0, mode->pixclock_khz, &clk_div, &clk_double);
/* Use tcon0 */
clrsetbits_le32(&lcdc->ctrl, SUNXI_LCDC_CTRL_IO_MAP_MASK,
SUNXI_LCDC_CTRL_IO_MAP_TCON0);
clk_delay = sunxi_lcdc_get_clk_delay(mode);
writel(SUNXI_LCDC_TCON0_CTRL_ENABLE |
SUNXI_LCDC_TCON0_CTRL_CLK_DELAY(clk_delay), &lcdc->tcon0_ctrl);
writel(SUNXI_LCDC_TCON0_DCLK_ENABLE |
SUNXI_LCDC_TCON0_DCLK_DIV(clk_div), &lcdc->tcon0_dclk);
writel(SUNXI_LCDC_X(mode->xres) | SUNXI_LCDC_Y(mode->yres),
&lcdc->tcon0_timing_active);
bp = mode->hsync_len + mode->left_margin;
total = mode->xres + mode->right_margin + bp;
writel(SUNXI_LCDC_TCON0_TIMING_H_TOTAL(total) |
SUNXI_LCDC_TCON0_TIMING_H_BP(bp), &lcdc->tcon0_timing_h);
bp = mode->vsync_len + mode->upper_margin;
total = mode->yres + mode->lower_margin + bp;
writel(SUNXI_LCDC_TCON0_TIMING_V_TOTAL(total) |
SUNXI_LCDC_TCON0_TIMING_V_BP(bp), &lcdc->tcon0_timing_v);
writel(SUNXI_LCDC_X(mode->hsync_len) | SUNXI_LCDC_Y(mode->vsync_len),
&lcdc->tcon0_timing_sync);
/* We only support hv-sync parallel lcd-s for now */
writel(0, &lcdc->tcon0_hv_intf);
writel(0, &lcdc->tcon0_cpu_intf);
if (sunxi_display.depth == 18 || sunxi_display.depth == 16) {
writel(SUNXI_LCDC_TCON0_FRM_SEED, &lcdc->tcon0_frm_seed[0]);
writel(SUNXI_LCDC_TCON0_FRM_SEED, &lcdc->tcon0_frm_seed[1]);
writel(SUNXI_LCDC_TCON0_FRM_SEED, &lcdc->tcon0_frm_seed[2]);
writel(SUNXI_LCDC_TCON0_FRM_SEED, &lcdc->tcon0_frm_seed[3]);
writel(SUNXI_LCDC_TCON0_FRM_SEED, &lcdc->tcon0_frm_seed[4]);
writel(SUNXI_LCDC_TCON0_FRM_SEED, &lcdc->tcon0_frm_seed[5]);
writel(SUNXI_LCDC_TCON0_FRM_TAB0, &lcdc->tcon0_frm_table[0]);
writel(SUNXI_LCDC_TCON0_FRM_TAB1, &lcdc->tcon0_frm_table[1]);
writel(SUNXI_LCDC_TCON0_FRM_TAB2, &lcdc->tcon0_frm_table[2]);
writel(SUNXI_LCDC_TCON0_FRM_TAB3, &lcdc->tcon0_frm_table[3]);
writel(((sunxi_display.depth == 18) ?
SUNXI_LCDC_TCON0_FRM_CTRL_RGB666 :
SUNXI_LCDC_TCON0_FRM_CTRL_RGB565),
&lcdc->tcon0_frm_ctrl);
}
val = 0;
if (!(mode->sync & FB_SYNC_HOR_HIGH_ACT))
val |= SUNXI_LCDC_TCON_HSYNC_MASK;
if (!(mode->sync & FB_SYNC_VERT_HIGH_ACT))
val |= SUNXI_LCDC_TCON_VSYNC_MASK;
writel(val, &lcdc->tcon0_io_polarity);
writel(0, &lcdc->tcon0_io_tristate);
}
static void sunxi_lcdc_tcon1_mode_set(const struct ctfb_res_modes *mode,
int *clk_div, int *clk_double)
{
@@ -618,7 +749,12 @@ static void sunxi_mode_set(const struct ctfb_res_modes *mode,
}
break;
case sunxi_monitor_lcd:
/* TODO */
sunxi_lcdc_panel_enable();
sunxi_composer_mode_set(mode, address);
sunxi_lcdc_tcon0_mode_set(mode);
sunxi_composer_enable();
sunxi_lcdc_enable();
sunxi_lcdc_backlight_enable();
break;
case sunxi_monitor_vga:
break;
@@ -641,11 +777,11 @@ void *video_hw_init(void)
{
static GraphicDevice *graphic_device = &sunxi_display.graphic_device;
const struct ctfb_res_modes *mode;
struct ctfb_res_modes edid_mode;
struct ctfb_res_modes custom;
const char *options;
unsigned int depth;
int i, ret, hpd, edid;
char mon[16];
char *lcd_mode = CONFIG_VIDEO_LCD_MODE;
memset(&sunxi_display, 0, sizeof(struct sunxi_display));
@@ -653,7 +789,8 @@ void *video_hw_init(void)
CONFIG_SUNXI_FB_SIZE >> 10);
gd->fb_base = gd->ram_top;
video_get_ctfb_res_modes(RES_MODE_1024x768, 24, &mode, &depth, &options);
video_get_ctfb_res_modes(RES_MODE_1024x768, 24, &mode,
&sunxi_display.depth, &options);
hpd = video_get_option_int(options, "hpd", 1);
edid = video_get_option_int(options, "edid", 1);
sunxi_display.monitor = sunxi_monitor_dvi;
@@ -678,16 +815,26 @@ void *video_hw_init(void)
ret = sunxi_hdmi_hpd_detect();
if (ret) {
printf("HDMI connected: ");
if (edid && sunxi_hdmi_edid_get_mode(&edid_mode) == 0)
mode = &edid_mode;
if (edid && sunxi_hdmi_edid_get_mode(&custom) == 0)
mode = &custom;
break;
}
if (!hpd)
break; /* User has requested to ignore hpd */
sunxi_hdmi_shutdown();
return NULL;
if (lcd_mode[0] == 0)
return NULL; /* No LCD, bail */
/* Fall back / through to LCD */
sunxi_display.monitor = sunxi_monitor_lcd;
case sunxi_monitor_lcd:
if (lcd_mode[0]) {
sunxi_display.depth = video_get_params(&custom, lcd_mode);
mode = &custom;
break;
}
printf("LCD not supported on this board\n");
return NULL;
case sunxi_monitor_vga:
@@ -729,16 +876,31 @@ int sunxi_simplefb_setup(void *blob)
{
static GraphicDevice *graphic_device = &sunxi_display.graphic_device;
int offset, ret;
const char *pipeline = NULL;
if (!sunxi_display.enabled)
return 0;
/* Find a framebuffer node, with pipeline == "de_be0-lcd0-hdmi" */
switch (sunxi_display.monitor) {
case sunxi_monitor_none:
return 0;
case sunxi_monitor_dvi:
case sunxi_monitor_hdmi:
pipeline = "de_be0-lcd0-hdmi";
break;
case sunxi_monitor_lcd:
pipeline = "de_be0-lcd0";
break;
case sunxi_monitor_vga:
break;
}
/* Find a prefilled simpefb node, matching out pipeline config */
offset = fdt_node_offset_by_compatible(blob, -1,
"allwinner,simple-framebuffer");
while (offset >= 0) {
ret = fdt_find_string(blob, offset, "allwinner,pipeline",
"de_be0-lcd0-hdmi");
pipeline);
if (ret == 0)
break;
offset = fdt_node_offset_by_compatible(blob, offset,