3.0-stable review patch. If anyone has any objections, please let me know.
------------------
From: Lothar Waßmann <l...@karo-electronics.de>
commit 6c1ecba8d84841277d68140ef485335d5be28485 upstream.
The VDCTRL4 register does not provide the MXS SET/CLR/TOGGLE feature.
The write in mxsfb_disable_controller() sets the data_cnt for the LCD
DMA to 0 which obviously means the max. count for the LCD DMA and
leads to overwriting arbitrary memory when the display is unblanked.
Signed-off-by: Lothar Waßmann <l...@karo-electronics.de>
Acked-by: Juergen Beisert <j...@pengutronix.de>
Tested-by: Lauri Hintsala <lauri.hints...@bluegiga.net>
Signed-off-by: Shawn Guo <shawn....@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/video/mxsfb.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/video/mxsfb.c
+++ b/drivers/video/mxsfb.c
@@ -365,7 +365,8 @@ static void mxsfb_disable_controller(str
loop--;
}
- writel(VDCTRL4_SYNC_SIGNALS_ON, host->base + LCDC_VDCTRL4 + REG_CLR);
+ reg = readl(host->base + LCDC_VDCTRL4);
+ writel(reg & ~VDCTRL4_SYNC_SIGNALS_ON, host->base + LCDC_VDCTRL4);
clk_disable(host->clk);
--
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