[Bug 27452] Evergreen KMS DRM sets bizarre 1922x1200 resolution

[bugzilla-daemon@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=27452

--- Comment #1 from Dave Witbrodt <dawitbro@sbcglobal.net> 2010-04-10 10:03:39 PDT ---
Seeing the recent set of commits touch on Evergreen support, I tested a new
kernel using "drm-radeon-testing" up to commit 98e5963 of Apr. 9, 2010.  I'm
not interested in UMS, so I configured to default to KMS.  My monitor only has
VGA and HDMI inputs, and I'm only interested in seeing the problem with HDMI
support for Evergreen solved in this bug report, so I only tested with the HDMI
cable.

Results:

- still have pink line along left side of screen (2 pixels wide)

- monitor OSD still reports crazy 1922x1200 mode (instead of 1920x1200)

- it is known that the hardware (both video card and monitor) are fine: 
Windows uses HDMI-to-HDMI cable (and DVI-to-HDMI cable) without problems

- as before, X runs fine; I will include Xorg.0.log for completion (problem is
in KMS/radeondrmfb, not X, though) in case any helpful info is present there


Brainstorming:

- looked at some of the DRM code, but couldn't understand HDMI connection
  code; apparently something in the ATOMBIOS functionality between HD 4XXX
  and HD 5XXX is subtly different

- possibly the problem arises with the KMS equivalent of what would be called 
modelines in X:  the Xorg.0.log shows that the preferred mode for the monitor
(1920x1200) is set using detailed timings reported by the monitor; this is fine
with UMS (and KMS on HD 4850), but fails with KMS on HD 5750 ...

    (II) RADEON(0): Supported detailed timing:
    (II) RADEON(0): clock: 154.0 MHz   Image Size:  593 x 371 mm
    (II) RADEON(0): h_active: 1920  h_sync: 1968  h_sync_end 2000 
         h_blank_end 2080 h_border: 0
    (II) RADEON(0): v_active: 1200  v_sync: 1203  v_sync_end 1209 
         v_blanking: 1235 v_border: 0

[FYI: the "drm-radeon-testing" commits now require JUNIPER*.bin firmware blobs,
but I did download them and add them to my kernel with a built-in initramfs --
see attached 'dmesg' output.]

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