DIRECT_CMD_STS_CTL
ctl = readl(dsi->regs + DIRECT_CMD_STS_CTL);
writel(ctl, dsi->regs + DIRECT_CMD_STS_CTL);
writel(wait, dsi->regs + DIRECT_CMD_STS_CTL);
writel(0, dsi->regs + DIRECT_CMD_STS_CTL);
writel(0, dsi->regs + DIRECT_CMD_STS_CTL);