drm/i915: Fix cursor visibility check with negative coordinates

When the cursor x coordinate is exactly -cursor_width, the cursor is
invisible. And obviously the same holds for the y coordinate and
cursor_height.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index b8d7ad6..f5e80b1 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6937,7 +6937,7 @@ static void intel_crtc_update_cursor(struct drm_crtc *crtc,
                base = 0;
 
        if (x < 0) {
-               if (x + intel_crtc->cursor_width < 0)
+               if (x + intel_crtc->cursor_width <= 0)
                        base = 0;
 
                pos |= CURSOR_POS_SIGN << CURSOR_X_SHIFT;
@@ -6946,7 +6946,7 @@ static void intel_crtc_update_cursor(struct drm_crtc *crtc,
        pos |= x << CURSOR_X_SHIFT;
 
        if (y < 0) {
-               if (y + intel_crtc->cursor_height < 0)
+               if (y + intel_crtc->cursor_height <= 0)
                        base = 0;
 
                pos |= CURSOR_POS_SIGN << CURSOR_Y_SHIFT;