drm/radeon: add properties to configure the width of the underscan borders

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This allows for a more exact fitting on the physical
display. The new properties default to zero which corresponds to the
previous underscan border width[height] formula:
(display_width[display_width] >> 5) + 16.

Example to set a horizontal border width of 30 and a vertikal border
height of 22:

   xrandr --output HDMI-0 --set underscan on --set "underscan hborder" 30 --set "underscan vborder" 22

Signed-off-by: Marius Gröger <marius.groeger@googlemail.com>
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

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This commit is contained in:

Marius Gröger 2010-09-21 21:30:59 +02:00 • committed by Dave Airlie

parent d0f8a854c3

commit 5bccf5e32f

3 changed files with 82 additions and 5 deletions

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55

drivers/gpu/drm/radeon/radeon_connectors.c

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28

drivers/gpu/drm/radeon/radeon_display.c

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4

drivers/gpu/drm/radeon/radeon_mode.h

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