[patch 30/55] drm/i915: handle 3rd pipe

[Greg KH]

3.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Eugeni Dodonov <eugeni.dodonov@xxxxxxxxx>

commit 07c1e8c1462fa7324de4c36ae9e55da2abd79cee upstream.

We don't need to check 3rd pipe specifically, as it shares PLL with some
other one.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=41977
Signed-off-by: Eugeni Dodonov <eugeni.dodonov@xxxxxxxxx>
Reviewed-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
Signed-off-by: Keith Packard <keithp@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/gpu/drm/i915/i915_suspend.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -34,6 +34,10 @@ static bool i915_pipe_enabled(struct drm
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	u32	dpll_reg;
 
+	/* On IVB, 3rd pipe shares PLL with another one */
+	if (pipe > 1)
+		return false;
+
 	if (HAS_PCH_SPLIT(dev))
 		dpll_reg = (pipe == PIPE_A) ? _PCH_DPLL_A : _PCH_DPLL_B;
 	else


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