MGA1064_PIX_CLK_CTL_CLK_POW_DOWN
tmp |= MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
tmp &= ~MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
tmp |= MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
tmp |= MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
tmp &= ~MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
tmp |= MGA1064_PIX_CLK_CTL_CLK_POW_DOWN | 0x80;