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 <LW@xxxxxxxxxxxxxxxxxxx> --- drivers/video/mxsfb.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c index d837d63..03cb95a 100644 --- a/drivers/video/mxsfb.c +++ b/drivers/video/mxsfb.c @@ -366,7 +366,8 @@ static void mxsfb_disable_controller(struct fb_info *fb_info) 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); -- 1.5.6.5 -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
