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drm/i915: fix Haswell FDI link disable path

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This covers the "Disable FDI" section from the CRT mode set sequence.
This disables the FDI receiver and also the FDI pll.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Paulo Zanoni
2012-11-01 21:05:05 -02:00
committed by Daniel Vetter
父節點 049456416f
當前提交 1ad960f25c
共有 3 個文件被更改，包括 30 次插入 和 3 次删除
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26
drivers/gpu/drm/i915/intel_ddi.c
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@@ -1365,6 +1365,32 @@ void intel_ddi_prepare_link_retrain(struct drm_encoder *encoder)
udelay(600);
}
void intel_ddi_fdi_disable(struct drm_crtc *crtc)
{
struct drm_i915_private *dev_priv = crtc->dev->dev_private;
struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
uint32_t val;
intel_ddi_post_disable(intel_encoder);
val = I915_READ(_FDI_RXA_CTL);
val &= ~FDI_RX_ENABLE;
I915_WRITE(_FDI_RXA_CTL, val);
val = I915_READ(_FDI_RXA_MISC);
val &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
val |= FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2);
I915_WRITE(_FDI_RXA_MISC, val);
val = I915_READ(_FDI_RXA_CTL);
val &= ~FDI_PCDCLK;
I915_WRITE(_FDI_RXA_CTL, val);
val = I915_READ(_FDI_RXA_CTL);
val &= ~FDI_RX_PLL_ENABLE;
I915_WRITE(_FDI_RXA_CTL, val);
}
static void intel_ddi_hot_plug(struct intel_encoder *intel_encoder)
{
struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base);