Question: Densityplot with a log scaled grid

Hello, 
I have tried to make a densityplot with a logarithmic scale on one axis using : 

So the plot is displayed with a log scale but the grid used to generate the plot is still linear, with a regular spacing.
I don't know how to make it logarithmic too. 
Maybe it's not very clear. For example I would like  a spacing of 0.1 from 0.1 to 1 then a spacing of 1 from 1 to 10.
How can I do that ? 
I have not find any clue in the help ...

EDIT : The option "axis[1]=[mode=log]" only change how the plot is displayed.
I would like to change the grid, that is to say how the plot is calculated.

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