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sunxi: video: Add support for VGA via external DACs connected to the LCD pins

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Add support for external DACs connected to the parallel LCD interface driving
a VGA connector, such as found on the Olimex A13 boards.

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 2014-12-24 12:17:07 +01:00
parent 2fbf091a54
commit e2bbdfb1e3
2 changed files with 23 additions and 0 deletions
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9
board/sunxi/Kconfig
View File

@ -294,6 +294,15 @@ config VIDEO_HDMI
---help---
Say Y here to add support for outputting video over HDMI.
config VIDEO_VGA_VIA_LCD
boolean "VGA via LCD controller support"
depends on VIDEO
default n
---help---
Say Y here to add support for external DACs connected to the parallel
LCD interface driving a VGA connector, such as found on the
Olimex A13 boards.
config VIDEO_LCD_MODE
string "LCD panel timing details"
depends on VIDEO

14
drivers/video/sunxi_display.c
View File

@ -767,6 +767,12 @@ static void sunxi_mode_set(const struct ctfb_res_modes *mode,
sunxi_lcdc_backlight_enable();
break;
case sunxi_monitor_vga:
#ifdef CONFIG_VIDEO_VGA_VIA_LCD
sunxi_composer_mode_set(mode, address);
sunxi_lcdc_tcon0_mode_set(mode);
sunxi_composer_enable();
sunxi_lcdc_enable();
#endif
break;
}
}
@ -808,6 +814,8 @@ void *video_hw_init(void)
hpd = video_get_option_int(options, "hpd", 1);
edid = video_get_option_int(options, "edid", 1);
sunxi_display.monitor = sunxi_monitor_dvi;
#elif defined CONFIG_VIDEO_VGA_VIA_LCD
sunxi_display.monitor = sunxi_monitor_vga;
#else
sunxi_display.monitor = sunxi_monitor_lcd;
#endif
@ -860,8 +868,13 @@ void *video_hw_init(void)
printf("LCD not supported on this board\n");
return NULL;
case sunxi_monitor_vga:
#ifdef CONFIG_VIDEO_VGA_VIA_LCD
sunxi_display.depth = 18;
break;
#else
printf("VGA not supported on this board\n");
return NULL;
#endif
}
if (mode->vmode != FB_VMODE_NONINTERLACED) {
@ -914,6 +927,7 @@ int sunxi_simplefb_setup(void *blob)
pipeline = "de_be0-lcd0";
break;
case sunxi_monitor_vga:
pipeline = "de_be0-lcd0";
break;
}