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https://github.com/brain-hackers/u-boot-brain
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fb75d972ea
On both my A13-OLinuxIno and my A13-OLinuxIno-Micro, the vga output gives an unstable image when active low v or hsync is used. The problem seems to be specific to the OLinuxIno A13 (normal & micro) boards. I've just looked up the schematics and they use an opendrain driver for the vga sync lines, and with sync pulses it is the logical high->low edge of the pulse which counts for the timing, which with an active low sync is being driven by the pull-up, and that simply seems to not drive it hard enough to get a stable image. So force v and hsync active high on these boards. independent of what the modeline says. This fixes the unstable image. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
19 lines
689 B
Plaintext
19 lines
689 B
Plaintext
CONFIG_SPL=y
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CONFIG_SYS_EXTRA_OPTIONS="CONS_INDEX=2,AXP209_POWER,USB_EHCI"
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CONFIG_FDTFILE="sun5i-a13-olinuxino.dtb"
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CONFIG_USB1_VBUS_PIN="PG11"
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CONFIG_VIDEO_HDMI=n
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CONFIG_VIDEO_VGA_VIA_LCD=y
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CONFIG_VIDEO_VGA_VIA_LCD_FORCE_SYNC_ACTIVE_HIGH=y
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# For use with the Olimex 7" LCD module, adjust timings for other displays
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# Set video-mode=sunxi:800x600-24@60,monitor=lcd in the env. to enable
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CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:16,ri:209,up:22,lo:22,hs:30,vs:1,sync:3,vmode:0"
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CONFIG_VIDEO_LCD_POWER="AXP0-0"
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CONFIG_VIDEO_LCD_BL_PWM="PB2"
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+S:CONFIG_ARM=y
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+S:CONFIG_ARCH_SUNXI=y
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+S:CONFIG_MACH_SUN5I=y
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+S:CONFIG_DRAM_CLK=408
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+S:CONFIG_DRAM_ZQ=123
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+S:CONFIG_DRAM_EMR1=0
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