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drm/i915/dp: make eDP PLL functions work as advertised

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Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Jesse Barnes
2010-10-07 16:01:24 -07:00
committed by Chris Wilson
parent 895692befa
commit 298b0b392c
1 changed files with 4 additions and 2 deletions
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6
drivers/gpu/drm/i915/intel_dp.c
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@ -891,8 +891,10 @@ static void ironlake_edp_pll_on(struct drm_encoder *encoder)
DRM_DEBUG_KMS("\n"); DRM_DEBUG_KMS("\n");
dpa_ctl = I915_READ(DP_A); dpa_ctl = I915_READ(DP_A);
dpa_ctl &= ~DP_PLL_ENABLE; dpa_ctl |= DP_PLL_ENABLE;
I915_WRITE(DP_A, dpa_ctl); I915_WRITE(DP_A, dpa_ctl);
POSTING_READ(DP_A);
udelay(200);
} }
static void ironlake_edp_pll_off(struct drm_encoder *encoder) static void ironlake_edp_pll_off(struct drm_encoder *encoder)
@ -902,7 +904,7 @@ static void ironlake_edp_pll_off(struct drm_encoder *encoder)
u32 dpa_ctl; u32 dpa_ctl;
dpa_ctl = I915_READ(DP_A); dpa_ctl = I915_READ(DP_A);
dpa_ctl |= DP_PLL_ENABLE; dpa_ctl &= ~DP_PLL_ENABLE;
I915_WRITE(DP_A, dpa_ctl); I915_WRITE(DP_A, dpa_ctl);
POSTING_READ(DP_A); POSTING_READ(DP_A);
udelay(200); udelay(200);