drm/i915/bdw: Change dp aux timeout to 600us on DDIA
Cc: Art Runyan <arthur.j.runyan@intel.com> Signed-off-by: Ben Widawsky <ben@bwidawsk.net> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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@ -405,6 +405,7 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
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uint32_t status;
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int try, precharge, clock = 0;
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bool has_aux_irq = INTEL_INFO(dev)->gen >= 5 && !IS_VALLEYVIEW(dev);
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uint32_t timeout;
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/* dp aux is extremely sensitive to irq latency, hence request the
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* lowest possible wakeup latency and so prevent the cpu from going into
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@ -419,6 +420,11 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
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else
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precharge = 5;
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if (IS_BROADWELL(dev) && ch_ctl == DPA_AUX_CH_CTL)
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timeout = DP_AUX_CH_CTL_TIME_OUT_600us;
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else
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timeout = DP_AUX_CH_CTL_TIME_OUT_400us;
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intel_aux_display_runtime_get(dev_priv);
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/* Try to wait for any previous AUX channel activity */
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@ -454,7 +460,7 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
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I915_WRITE(ch_ctl,
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DP_AUX_CH_CTL_SEND_BUSY |
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(has_aux_irq ? DP_AUX_CH_CTL_INTERRUPT : 0) |
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DP_AUX_CH_CTL_TIME_OUT_400us |
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timeout |
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(send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
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(precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) |
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(aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) |
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