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drm/i915: Extract icl_combo_phy_loadgen_select()
Pull the convoluted loadgen calculation into a small helper. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211006204937.30774-7-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula <jani.nikula@intel.com>
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1 changed files with 14 additions and 9 deletions
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@ -1023,6 +1023,18 @@ static u8 intel_ddi_dp_preemph_max(struct intel_dp *intel_dp)
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return DP_TRAIN_PRE_EMPH_LEVEL_3;
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}
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static u32 icl_combo_phy_loadgen_select(const struct intel_crtc_state *crtc_state,
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int lane)
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{
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if (crtc_state->port_clock > 600000)
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return 0;
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if (crtc_state->lane_count == 4)
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return lane >= 1 ? LOADGEN_SELECT : 0;
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else
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return lane == 1 || lane == 2 ? LOADGEN_SELECT : 0;
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}
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static void icl_ddi_combo_vswing_program(struct intel_encoder *encoder,
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const struct intel_crtc_state *crtc_state)
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{
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@ -1089,11 +1101,8 @@ static void icl_combo_phy_set_signal_levels(struct intel_encoder *encoder,
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{
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struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
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enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
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int width, rate, ln;
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u32 val;
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width = crtc_state->lane_count;
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rate = crtc_state->port_clock;
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int ln;
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/*
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* 1. If port type is eDP or DP,
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@ -1117,11 +1126,7 @@ static void icl_combo_phy_set_signal_levels(struct intel_encoder *encoder,
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for (ln = 0; ln < 4; ln++) {
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val = intel_de_read(dev_priv, ICL_PORT_TX_DW4_LN(ln, phy));
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val &= ~LOADGEN_SELECT;
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if ((rate <= 600000 && width == 4 && ln >= 1) ||
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(rate <= 600000 && width < 4 && (ln == 1 || ln == 2))) {
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val |= LOADGEN_SELECT;
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}
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val |= icl_combo_phy_loadgen_select(crtc_state, ln);
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intel_de_write(dev_priv, ICL_PORT_TX_DW4_LN(ln, phy), val);
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}
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