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| author | Jesse Barnes <jbarnes@virtuousgeek.org> | 2011-11-15 10:28:53 -0800 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2012-01-03 14:55:47 -0800 |
| commit | 7a4198664d46b87025a64530f1530ab2bea54c19 (patch) | |
| tree | c6388ac83d02d5f4cdc396308339a3cbe3363a85 /drivers/gpu | |
| parent | e6bfaf854272ec4641a9ef7b1cb1ca963031ba95 (diff) | |
| download | linux-7a4198664d46b87025a64530f1530ab2bea54c19.tar.gz linux-7a4198664d46b87025a64530f1530ab2bea54c19.tar.bz2 linux-7a4198664d46b87025a64530f1530ab2bea54c19.zip | |
drm/i915: don't disable a PCH DPLL that's in use
If a PCH pipe PLL is being used by transcoder C, don't disable it.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 2e00c8ae361c..bdab82b999e0 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1204,7 +1204,8 @@ static void intel_disable_pch_pll(struct drm_i915_private *dev_priv, enum pipe pipe) { int reg; - u32 val; + u32 val, pll_mask = TRANSC_DPLL_ENABLE | TRANSC_DPLLB_SEL, + pll_sel = TRANSC_DPLL_ENABLE; if (pipe > 1) return; @@ -1215,6 +1216,15 @@ static void intel_disable_pch_pll(struct drm_i915_private *dev_priv, /* Make sure transcoder isn't still depending on us */ assert_transcoder_disabled(dev_priv, pipe); + if (pipe == 0) + pll_sel |= TRANSC_DPLLA_SEL; + else if (pipe == 1) + pll_sel |= TRANSC_DPLLB_SEL; + + + if ((I915_READ(PCH_DPLL_SEL) & pll_mask) == pll_sel) + return; + reg = PCH_DPLL(pipe); val = I915_READ(reg); val &= ~DPLL_VCO_ENABLE; |