On 10/25/2012 12:32 AM, Mark Zhang wrote: > On 10/23/2012 01:14 AM, Stephen Warren wrote: ... >> I don't recall why pta was defined to be HDMI. The issue isn't that this >> patch changes the pinmux selection for the pta pingroup, but simply that >> both the pinctrl node's state definition, and the new I2C mux node's >> state definition both attempt to configure pingroup pta. The solution is >> most likely to simply remove the pta configuration from the main pinctrl >> node. > > Understood. I tried to remove the hdmi function definition of pta > pingroup yesterday then found HDMI can't work anymore. The EDID of HDMI > monitor can't be fetched. After some debugging, I have found that it's > caused by "i2c-mux-pinctrl" driver is loaded after drm driver. That > makes drm driver can't get EDID data via this i2c mux adapter because it > doesn't exist at that time. So I think we need to promote the load level > of "i2c-mux-pinctrl" driver. Any other ideas? (BTW, your message that I'm replying to wasn't word-wrapped correctly) No, i2c-mux-pinctrl shouldn't need to change. It sounds like tegra-drm isn't supporting deferred probe correctly; when it needs access to an I2C adapter that doesn't exist, it should defer its own probe until the I2C adapter does exist. -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html