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drm/i915: assert panel is unlocked before writing transcoder timing regs
author
Jesse Barnes
<jbarnes@virtuousgeek.org>
Tue, 4 Jan 2011 23:09:35 +0000
(15:09 -0800)
committer
Chris Wilson
<chris@chris-wilson.co.uk>
Wed, 19 Jan 2011 12:37:03 +0000
(12:37 +0000)
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>
drivers/gpu/drm/i915/intel_display.c
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diff --git
a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index
515e0b9
..
f274d5b
100644
(file)
--- a/
drivers/gpu/drm/i915/intel_display.c
+++ b/
drivers/gpu/drm/i915/intel_display.c
@@
-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)));