drm/i915: Split write of pattern to DP reg from intel_dp_set_link_train

Split the register write with the new link training pattern out of
intel_dp_set_link_train(), so that the i915 specific code is in a
separate function.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1445594525-7174-3-git-send-email-ander.conselvan.de.oliveira@intel.com

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 6917dd1..3b695c1 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -3594,20 +3594,28 @@ intel_dp_set_signal_levels(struct intel_dp *intel_dp)
        intel_dp->DP = (intel_dp->DP & ~mask) | signal_levels;
 }
 
-static bool
-intel_dp_set_link_train(struct intel_dp *intel_dp,
-                       uint8_t dp_train_pat)
+static void
+intel_dp_program_link_training_pattern(struct intel_dp *intel_dp,
+                                      uint8_t dp_train_pat)
 {
        struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
        struct drm_i915_private *dev_priv =
                to_i915(intel_dig_port->base.base.dev);
-       uint8_t buf[sizeof(intel_dp->train_set) + 1];
-       int ret, len;
 
        _intel_dp_set_link_train(intel_dp, &intel_dp->DP, dp_train_pat);
 
        I915_WRITE(intel_dp->output_reg, intel_dp->DP);
        POSTING_READ(intel_dp->output_reg);
+}
+
+static bool
+intel_dp_set_link_train(struct intel_dp *intel_dp,
+                       uint8_t dp_train_pat)
+{
+       uint8_t buf[sizeof(intel_dp->train_set) + 1];
+       int ret, len;
+
+       intel_dp_program_link_training_pattern(intel_dp, dp_train_pat);
 
        buf[0] = dp_train_pat;
        if ((dp_train_pat & DP_TRAINING_PATTERN_MASK) ==