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From c5666fb07de9499337e69ebde032d9cbcad7e418 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michel=20D=C3=A4nzer?= <michel.daenzer@amd.com>
Date: Tue, 17 Jul 2012 19:02:09 +0200
Subject: [PATCH 50/73] drm/radeon: Try harder to avoid HW cursor ending on a
multiple of 128 columns.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
commit f60ec4c7df043df81e62891ac45383d012afe0da 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: Ben Hutchings <ben@decadent.org.uk>
---
drivers/gpu/drm/radeon/radeon_cursor.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_cursor.c b/drivers/gpu/drm/radeon/radeon_cursor.c
index 986d608..2132109 100644
--- a/drivers/gpu/drm/radeon/radeon_cursor.c
+++ b/drivers/gpu/drm/radeon/radeon_cursor.c
@@ -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);
+ }
+ }
}
}
--
1.7.7.6
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