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drm/radeon: Try harder to avoid HW cursor ending on a multiple of 128 columns.

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This could previously fail if either of the enabled displays was using a
horizontal resolution that is a multiple of 128, and only the leftmost column
of the cursor was (supposed to be) visible at the right edge of that display.

The solution is to move the cursor one pixel to the left in that case.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=33183

Cc: stable@vger.kernel.org
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Michel Dänzer 2012-07-17 19:02:09 +02:00 committed by Dave Airlie
parent e811f5ae19
commit f60ec4c7df
1 changed files with 7 additions and 1 deletions
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8
drivers/gpu/drm/radeon/radeon_cursor.c
View file

@ -262,8 +262,14 @@ int radeon_crtc_cursor_move(struct drm_crtc *crtc,
if (!(cursor_end & 0x7f))
w--;
}
if (w <= 0)
if (w <= 0) {
w = 1;
cursor_end = x - xorigin + w;
if (!(cursor_end & 0x7f)) {
x--;
WARN_ON_ONCE(x < 0);
}
}
}
}