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drm/i915: assert panel is unlocked before writing transcoder timing regs

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Otherwise our writes will be silently ignored.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Jesse Barnes 2011-01-04 15:09:35 -08:00 committed by Chris Wilson
parent 92f2584a08
commit d9b6cb568b
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/intel_display.c
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@ -2444,7 +2444,8 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc)
I915_WRITE(PCH_DPLL_SEL, temp);
}
/* set transcoder timing */
/* set transcoder timing, panel must allow it */
assert_panel_unlocked(dev_priv, pipe);
I915_WRITE(TRANS_HTOTAL(pipe), I915_READ(HTOTAL(pipe)));
I915_WRITE(TRANS_HBLANK(pipe), I915_READ(HBLANK(pipe)));
I915_WRITE(TRANS_HSYNC(pipe), I915_READ(HSYNC(pipe)));