PHY_TST_CTRL1
writel(reg_write, base + PHY_TST_CTRL1);
writel(val, base + PHY_TST_CTRL1);
dsi_reg_up(ctx, PHY_TST_CTRL1, PHY_TESTEN, PHY_TESTEN);
dsi_reg_wr(ctx, PHY_TST_CTRL1, PHY_TESTDIN, 0, reg);
dsi_reg_up(ctx, PHY_TST_CTRL1, PHY_TESTEN, 0);
dsi_reg_wr(ctx, PHY_TST_CTRL1, PHY_TESTDIN, 0, val);
dsi_reg_up(ctx, PHY_TST_CTRL1, PHY_TESTEN, PHY_TESTEN);
dsi_reg_wr(ctx, PHY_TST_CTRL1, PHY_TESTDIN, 0, reg);
dsi_reg_up(ctx, PHY_TST_CTRL1, PHY_TESTEN, 0);
ret = dsi_reg_rd(ctx, PHY_TST_CTRL1, PHY_TESTDOUT, 8);