TC358749XBG调试mipi_csi2寄存器全为0

[857849964]

当我加载TC358749XBG驱动时mipi_csi2寄存器发生如下变化，在调用mipi_csi2_disable中的clk_disable_unprepare(info->dphy_clk);后mipi_csi2的寄存器全变为0，想知道是什么原因会导致这种情况呢？

MIPI_CSI2_VERSION =  0x3130302A
MIPI_CSI2_N_LANES =  0x00000001
MIPI_CSI2_PHY_SHUTDOWNZ =  0x00000001
MIPI_CSI2_DPHY_RSTZ =  0x00000001
MIPI_CSI2_CSI2_RESETN =  0x00000001
MIPI_CSI2_PHY_STATE =  0x00000300
MIPI_CSI2_DATA_IDS_1 =  0x00000000
MIPI_CSI2_DATA_IDS_2 =  0x00000000
MIPI_CSI2_ERR1 =  0x00000000
MIPI_CSI2_ERR2 =  0x00000000
MIPI_CSI2_MASK1 =  0x00000000
MIPI_CSI2_MASK2 =  0x00000000
MIPI_CSI2_PHY_TST_CTRL0 =  0x00000000
MIPI_CSI2_PHY_TST_CTRL1 =  0x00001414
MIPI_CSI2_SFT_RESET =  0x00000000

mipi_csi2_disable:130

MIPI_CSI2_VERSION =  0x00000000
MIPI_CSI2_N_LANES =  0x00000000
MIPI_CSI2_PHY_SHUTDOWNZ =  0x00000000
MIPI_CSI2_DPHY_RSTZ =  0x00000000
MIPI_CSI2_CSI2_RESETN =  0x00000000
MIPI_CSI2_PHY_STATE =  0x00000000
MIPI_CSI2_DATA_IDS_1 =  0x00000000
MIPI_CSI2_DATA_IDS_2 =  0x00000000
MIPI_CSI2_ERR1 =  0x00000000
MIPI_CSI2_ERR2 =  0x00000000
MIPI_CSI2_MASK1 =  0x00000000
MIPI_CSI2_MASK2 =  0x00000000
MIPI_CSI2_PHY_TST_CTRL0 =  0x00000000
MIPI_CSI2_PHY_TST_CTRL1 =  0x00000000
MIPI_CSI2_SFT_RESET =  0x00000000

[jimmychan]

So you disable the clk? then read the value of register is zero ?

[857849964]

官方代码都是disable的，而且在我们其他项目里面也是有disable clk的操作，但是他们操作完了之后还是能正常读取寄存器的值

[jimmychan]

I think you should not disable the clock if you want to read the value from the register.

[857849964]

我在官方代码上在dts中把fb1的hdmi输出disable后就会出现这种情况，当我把他okay后，就能正常读取寄存器，不知道这两者有没有实际联系，我在代码上是没有看到任何联系的，可以的话，麻烦指点一下！谢谢！