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>

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 46837a0f6f6ffc220100261e25452339146599ff..3fec49b91d25eccb93e5d37711a4c2ba13f62011 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -405,6 +405,7 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
        uint32_t status;
        int try, precharge, clock = 0;
        bool has_aux_irq = INTEL_INFO(dev)->gen >= 5 && !IS_VALLEYVIEW(dev);
+       uint32_t timeout;
 
        /* dp aux is extremely sensitive to irq latency, hence request the
         * lowest possible wakeup latency and so prevent the cpu from going into
@@ -419,6 +420,11 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
        else
                precharge = 5;
 
+       if (IS_BROADWELL(dev) && ch_ctl == DPA_AUX_CH_CTL)
+               timeout = DP_AUX_CH_CTL_TIME_OUT_600us;
+       else
+               timeout = DP_AUX_CH_CTL_TIME_OUT_400us;
+
        intel_aux_display_runtime_get(dev_priv);
 
        /* Try to wait for any previous AUX channel activity */
@@ -454,7 +460,7 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
                        I915_WRITE(ch_ctl,
                                   DP_AUX_CH_CTL_SEND_BUSY |
                                   (has_aux_irq ? DP_AUX_CH_CTL_INTERRUPT : 0) |
-                                  DP_AUX_CH_CTL_TIME_OUT_400us |
+                                  timeout |
                                   (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
                                   (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) |
                                   (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) |