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drm/i915: fix DDI PLLs HW state readout code

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commit 0882dae983707455e97479e5e904e37673517ebc upstream.

Properly zero the refcounts and crtc->ddi_pll_set so the previous HW
state doesn't affect the result of reading the current HW state.

This fixes WARNs about WRPLL refcount if we have an HDMI monitor on
HSW and then suspend/resume.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=64379
Tested-by: Qingshuai Tian <qingshuai.tian@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Paulo Zanoni
2014-01-08 11:12:27 -02:00
committed by Greg Kroah-Hartman
parent 4cb1e59ffc
commit ba8ee59850
1 changed files with 7 additions and 1 deletions
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drivers/gpu/drm/i915/intel_ddi.c
+7 -1
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@@ -1193,12 +1193,18 @@ void intel_ddi_setup_hw_pll_state(struct drm_device *dev)
enum pipe pipe;
struct intel_crtc *intel_crtc;
dev_priv->ddi_plls.spll_refcount = 0;
dev_priv->ddi_plls.wrpll1_refcount = 0;
dev_priv->ddi_plls.wrpll2_refcount = 0;
for_each_pipe(pipe) {
intel_crtc =
to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
if (!intel_crtc->active)
if (!intel_crtc->active) {
intel_crtc->ddi_pll_sel = PORT_CLK_SEL_NONE;
continue;
}
intel_crtc->ddi_pll_sel = intel_ddi_get_crtc_pll(dev_priv,
pipe);