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| author | Mario Kleiner <mario.kleiner@tuebingen.mpg.de> | 2010-10-05 19:57:36 -0400 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2010-10-06 11:46:27 +1000 |
| commit | 6383cf7d7839bf52aa4efa20cc921773126797f4 (patch) | |
| tree | 963fa5cff40af73656442ccc1b7fdaf2097332ea /drivers/gpu/drm/radeon/radeon_pm.c | |
| parent | ba032a58d1f320039e7850fb6e8651695c1aa571 (diff) | |
| download | blackbird-op-linux-6383cf7d7839bf52aa4efa20cc921773126797f4.tar.gz blackbird-op-linux-6383cf7d7839bf52aa4efa20cc921773126797f4.zip | |
drm/radeon: Add function for display scanout position query.
radeon_get_crtc_scanoutpos() returns the current horizontal
and vertical scanout position of a crtc. It also reports if
the display scanout is currently inside the vblank area.
hpos reports current horizontal pixel scanout position.
vpos reports the current scanned out line as a value >= 0
in active scanout. If the scanout is inside vblank area, it
reports a negative value, the number of scanlines until
end of vblank aka start of active scanout, e.g., -3 ==
"At most 3 scanlines until end of vblank".
This code is derived from radeon_pm_in_vbl(), tested on
R500 and R600.
Signed-off-by: Mario Kleiner <mario.kleiner@tuebingen.mpg.de>
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_pm.c')
0 files changed, 0 insertions, 0 deletions
