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drm/i915: Only enable the plane after setting the fb base (pre-ILK) 

When enabling the plane, it is helpful to have already pointed that
plane to valid memory or else we may incur the wrath of a PGTBL_ER.
This code preserved the behaviour from the bad old days for unknown
reasons...

Found by assert_fb_bound_for_plane().

References: https://bugs.freedesktop.org/show_bug.cgi?id=36246
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Chris Wilson 2011-04-19 21:14:14 +01:00 committed by Keith Packard
parent 31acbcc408
commit 49183b2818
1 changed files with 0 additions and 2 deletions
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2
drivers/gpu/drm/i915/intel_display.c
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@ -5154,8 +5154,6 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc,
I915_WRITE(DSPCNTR(plane), dspcntr); I915_WRITE(DSPCNTR(plane), dspcntr);
POSTING_READ(DSPCNTR(plane)); POSTING_READ(DSPCNTR(plane));
if (!HAS_PCH_SPLIT(dev))
intel_enable_plane(dev_priv, plane, pipe);
ret = intel_pipe_set_base(crtc, x, y, old_fb); ret = intel_pipe_set_base(crtc, x, y, old_fb);