I have a RAW-enabled camera phone, LG G4 (H-815), which outputs DNG files, but RT has some problems with these.
First, it crops the very edges of the DNG as compared to the JPEG, exactly the opposite of what normally happens (however, in this case the JPEG might contain the whole frame without cropping, I'm not sure). I was unable to solve it through camconst.json.
The second problem is the images having abnormal white balance, resulting in the erroneous request of WB range extension (as a DNG from this phone happened to be my first shot of a fully HPS-illuminated scene I deemed worth processing, I thought it's a general problem ).
And the HPS-illuminated scene showing the WB problem (already posted in the WB range topic):