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Date: Mon, 16 Aug 2010 22:09:54 +0200 From: Ondrej Zary <linux@...nbow-software.org> To: "Russell King - ARM Linux" <linux@....linux.org.uk> Cc: linux-fbdev@...r.kernel.org, Kernel development list <linux-kernel@...r.kernel.org> Subject: [PATCH] [RFC] cyber2000fb: avoid palette corruption at higher clocks When 1280x1024@...z mode is set, console palette is not set properly - sometimes the background is white, sometimes yellow and text colors are also messed up. This does not happen at 1280x1024@...z and below. It seems that the HW needs some time before setting the palette - maybe the PLL needs more time to lock at higher speeds. This patch fixes the problem but without knowing what register to check for PLL lock(?), the delay might be excessive. Signed-off-by: Ondrej Zary <linux@...nbow-software.org> --- linux-2.6.35-rc3-/drivers/video/cyber2000fb.c 2010-08-15 21:13:39.000000000 +0200 +++ linux-2.6.35-rc3/drivers/video/cyber2000fb.c 2010-08-15 21:25:20.000000000 +0200 @@ -506,6 +506,9 @@ static void cyber2000fb_set_timing(struc cyber2000_grphw(0xb9, 0x80, cfb); cyber2000_grphw(0xb9, 0x00, cfb); + /* wait (for the PLL?) to avoid palette corruption at higher clocks */ + msleep(1000); + cfb->ramdac_ctrl = hw->ramdac; cyber2000fb_write_ramdac_ctrl(cfb); -- Ondrej Zary -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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