Re: [Nouveau] [PATCH 5/6] drm: Delete "mandatory" stereographic modes

[Ilia Mirkin <imirkin@alum.mit.edu>]

On Wed, Jan 18, 2017 at 11:57 AM, Ilia Mirkin <imirkin@alum.mit.edu> wrote:
> On Wed, Jan 18, 2017 at 11:41 AM, Damien Lespiau
> <damien.lespiau@intel.com> wrote:
>> On Wed, Jan 18, 2017 at 04:33:43PM +0000, Damien Lespiau wrote:
>>> On Wed, Jan 18, 2017 at 11:27:16AM -0500, Ilia Mirkin wrote:
>>> > Damien - did you ever test these mandatory modes on an actual
>>> > commercial 3D TV or similar device?
>>>
>>> My main testing device was a Samsung TV with this 3D_present bit set and
>>> all the advertised modes were working. Can't quite remember if that
>>> included the interleaved mode.
>>
>> I even pushed the EDID of that TV to edid-decode [1] if someone needs to
>> check that the EDID parsing is correct. It'd be interesting to see what
>> the tool has to say about the edid of the sink causing problems, in
>> particular compare the mandatory modes to the other modes advertised by
>> that TV. Maybe we could see some kind of pattern emerge, like the 3D
>> modes supported being the ones with the timings in table 8-15.
>
> This is Alastair's display (one of them): http://paste.lisp.org/display/335893
>
> I believe this is the interesting part:
>
>   Video data block
>     VIC  16 1920x1080@60Hz
>     VIC  31 1920x1080@50Hz
>     VIC   5 1920x1080i@60Hz
>     VIC  20 1920x1080i@50Hz
>     VIC   4 1280x720@60Hz
>     VIC  19 1280x720@50Hz
>     VIC   3 720x480@60Hz
>     VIC   2 720x480@60Hz
>     VIC  18 720x576@50Hz
>     VIC  17 720x576@50Hz
>     VIC   7 1440x480i@60Hz
>     VIC   6 1440x480i@60Hz
>     VIC  22 1440x576i@50Hz
>     VIC  21 1440x576i@50Hz
>     VIC  32 1920x1080@24Hz
>     VIC   1 640x480@60Hz
> ...
>     Extended HDMI video details:
>       3D present
>       Base EDID image size is in units of 1cm
>       VIC index 2 supports side-by-side (half, horizontal)
>       VIC index 3 supports side-by-side (half, horizontal)
>       VIC index 4 supports side-by-side (half, horizontal)
>       VIC index 5 supports side-by-side (half, horizontal)
>       VIC index 14 supports side-by-side (half, horizontal)
>       VIC index 0 supports top-and-bottom
>       VIC index 1 supports top-and-bottom

And for the record, this is his other TV (available at the same paste
url as above):

  Video data block
    VIC  16 1920x1080@60Hz (native)
    VIC  34 1920x1080@30Hz
    VIC  32 1920x1080@24Hz
    VIC   5 1920x1080i@60Hz
    VIC   4 1280x720@60Hz
    VIC   3 720x480@60Hz
    VIC   2 720x480@60Hz
    VIC   1 640x480@60Hz
    Extended HDMI video details:
      3D present
      3D-capable-VIC mask present
      3D: Side-by-side (half, horizontal)
      3D: Top-and-bottom
      3D VIC indices: 2 4
      VIC index 0 supports side-by-side (half, horizontal)
      VIC index 1 supports side-by-side (half, horizontal)
      VIC index 2 supports side-by-side (half, horizontal)
      VIC index 3 supports side-by-side (half, horizontal)
      VIC index 4 supports side-by-side (half, horizontal)

After some more conversations with Alastair, it sounds like what's
actually going on is that it's just the frame-packing modes that
aren't working, but all the side-by-side and top-and-bottom modes from
the "mandatory" list work. At this point, I'm more inclined to believe
that there's an issue in the nouveau implementation for frame-packed
modes. But it could still be the TVs themselves that don't support
that at all.

Cheers,

  -ilia
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