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>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 46837a0f6f6f..3fec49b91d25 100644
--- 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) |