[Nouveau] [Bug 92274] nouveau black screen and errors with two monitors attached

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92274

--- Comment #10 from joseph-thommes at gmx.de ---
Ok I'm sorry to ask again, but I've got no idea what the methods nvkm_mask,
read, and wr32 are expecting, returning or doing, so I cannot
think by myself what to do...
(By the way in my sources they are just named nv_*.)
So where can I find documentation about it or where are they defined?
I'm familiar with (userspace) C, but not in these dimensions
and I don't know how to locate the definition of a function except for
looking in all included headers recursively...
Did I understand you correctly, that I should make the changes like this:
(again I've got no idea what these functions do, so it might be nonsense)

/* AVI InfoFrame */

        u32 foo = nvkm_rd32(device, 0x690000 + hdmi);
        nvkm_wr32(device, 0x690000 + hdmi, foo & ~1);
        nvkm_wr32(device, 0x69000c + hdmi, 0x0000006f);
        nvkm_wr32(device, 0x690010 + hdmi, 0x00000000);
        nvkm_wr32(device, 0x690014 + hdmi, 0x00000000);
        nvkm_wr32(device, 0x690018 + hdmi, 0x00000000);
        nvkm_wr32(device, 0x690000 + hdmi, foo | 1);

        /* ??? InfoFrame? */
        u32 foo = nvkm_rd32(device, 0x6900c0 + hdmi);        
        nvkm_wr32(device, 0x6900c0 + hdmi, foo & ~1);
        nvkm_wr32(device, 0x6900cc + hdmi, 0x00000010);
        nvkm_wr32(device, 0x6900c0 + hdmi, foo | 1);

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