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

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commit f60ec4c7df upstream.

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

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michel Dänzer
2012-07-17 19:02:09 +02:00
committed by Greg Kroah-Hartman
parent 4ffd3692dd
commit 4826f249d0
1 changed files with 7 additions and 1 deletions
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8
drivers/gpu/drm/radeon/radeon_cursor.c
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@@ -257,8 +257,14 @@ 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);
}
}
}
}