California Deductible Mortgage Interest - out-of-state property

Hi, 

I have a rental & personal use combined property in MA, but after June 2019 I moved to CA, and the property became a rental property. I have mortgage interest for this property, total interest amount (including both rental & personal use) is $4,000. When comes to CA tax return, how much should I fill for California Deductible Mortgage Interest? the whole $4,000? or others?