drm/i915: Set framebuffer alignment based upon the fence constraints.

Set the request alignment to 0, and leave it up to i915_gem_object_pin()
to set the appropriate alignment to match the fence covering the object.

Eric Anholt mentioned that the pinning code is meant to choose the
maximum of the request alignment and that of the fence covering the
object... However currently, the pinning code will only apply the fence
constraints if the supplied alignment is 0.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index bbdd72909a113db3cf70411de682121d57ebba0a..a440d0db5ccce14d0fb1317d7900dc3b28fb5930 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -377,10 +377,8 @@ intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
                alignment = 64 * 1024;
                break;
        case I915_TILING_X:
-               if (IS_I9XX(dev))
-                       alignment = 1024 * 1024;
-               else
-                       alignment = 512 * 1024;
+               /* pin() will align the object as required by fence */
+               alignment = 0;
                break;
        case I915_TILING_Y:
                /* FIXME: Is this true? */