[PATCH] Allow/Fix use of multiple ZaphodHead outputs per x-screen. (v2)

[Michel Dänzer]

On 11.06.2015 03:55, Mario Kleiner wrote:
> Defining multiple ZaphodHead outputs per x-screen in a
> multiple x-screen's per gpu configuration caused all
> outputs except one per x-screen to go dark, because
> there was a fixed mapping x-screen number -> crtc number,
> limiting the number of crtc's per x-screen to one.
> 
> On a ZaphodHead's setup, be more clever and assign
> as many crtc's to a given x-screen as there are
> ZaphodHeads defined for that screen, assuming
> there are enough unused crtc's available.
> 
> Tested on a triple display setup with different combos
> of one, two or three ZaphodHeads per one, two or three
> x-screens.
> 
> This is a port of almost identical code from
> nouveau-ddx.
> 
> v2: Implement suggestions by Michel Daenzer: Less verbose
>     debug output, more clear warning message on crtc allocation
>     failure. Move clearing of per gpu assigned_crtc mask to
>     CloseScreen, indeed testing shows no need for the more
>     complex new server generation check from v1.
> 
> Signed-off-by: Mario Kleiner <mario.kleiner.de at gmail.com>
> (v1) Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

Reviewed and pushed with a slightly modified commit log, thanks!


-- 
Earthling Michel Dänzer               |               http://www.amd.com
Libre software enthusiast             |             Mesa and X developer