drm/i915: fixup assert_pipe to take the pipe A quirk into account
This was completely spamming dmesg on my i855gm. This issue was just
shortly introduced with:
commit 931872fcea
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date: Mon Jan 16 23:01:13 2012 +0000
drm/i915: Check that plane/pipe is disabled before removing the fb
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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@ -936,6 +936,10 @@ void assert_pipe(struct drm_i915_private *dev_priv,
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u32 val;
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bool cur_state;
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/* if we need the pipe A quirk it must be always on */
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if (pipe == PIPE_A && dev_priv->quirks & QUIRK_PIPEA_FORCE)
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state = true;
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reg = PIPECONF(pipe);
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val = I915_READ(reg);
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cur_state = !!(val & PIPECONF_ENABLE);
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