From: Ander Conselvan de Oliveira Date: Fri, 23 Oct 2015 10:01:47 +0000 (+0300) Subject: drm/i915: Move register write into intel_dp_set_signal_levels() X-Git-Tag: v4.5-rc1~74^2~37^2~146 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b905a9155db6fd51bfdb7625b7d0c5c3047d49f2;p=karo-tx-linux.git drm/i915: Move register write into intel_dp_set_signal_levels() Move register write from intel_dp_update_link_train() into intel_dp_set_signal_levels(). This creates a better split between the i915 specific code and the generic link training part. Note that this causes an extra register write in intel_dp_reset_link_train(), since both intel_dp_set_signal_levels() and intel_dp_set_link_train() write to the DP register. Signed-off-by: Ander Conselvan de Oliveira Reviewed-by: Sivakumar Thulasimani Link: http://patchwork.freedesktop.org/patch/msgid/1445594525-7174-5-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 37d51d3ab26a..cf9255efa8b1 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -3550,13 +3550,13 @@ gen7_edp_signal_levels(uint8_t train_set) } } -/* Properly updates "DP" with the correct signal levels. */ static void intel_dp_set_signal_levels(struct intel_dp *intel_dp) { struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); enum port port = intel_dig_port->port; struct drm_device *dev = intel_dig_port->base.base.dev; + struct drm_i915_private *dev_priv = to_i915(dev); uint32_t signal_levels, mask = 0; uint8_t train_set = intel_dp->train_set[0]; @@ -3592,6 +3592,9 @@ intel_dp_set_signal_levels(struct intel_dp *intel_dp) DP_TRAIN_PRE_EMPHASIS_SHIFT); intel_dp->DP = (intel_dp->DP & ~mask) | signal_levels; + + I915_WRITE(intel_dp->output_reg, intel_dp->DP); + POSTING_READ(intel_dp->output_reg); } static void @@ -3647,16 +3650,10 @@ intel_dp_reset_link_train(struct intel_dp *intel_dp, static bool intel_dp_update_link_train(struct intel_dp *intel_dp) { - 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); int ret; intel_dp_set_signal_levels(intel_dp); - I915_WRITE(intel_dp->output_reg, intel_dp->DP); - POSTING_READ(intel_dp->output_reg); - ret = drm_dp_dpcd_write(&intel_dp->aux, DP_TRAINING_LANE0_SET, intel_dp->train_set, intel_dp->lane_count);