drm/i915/chv: Add phy supports for Cherryview

Added programming phy layer for CHV based on "Application note for 1273
CHV Display phy".

v2: Rebase the code and do some cleanup.
v3: Rework based on Ville review.
    -Fix the macro where the ch info need to swap, and add parens to ?
	 operator.
	-Fix wrong bit define for DPIO_PCS_SWING_CALC_0 and
	 DPIO_PCS_SWING_CALC_1 and rename for meaningful.
    -Add some comments for CHV specific DPIO registers.
    -Change the dp margin registery value to decimal to align with the
	 doc.
	-Fix the not clearing some value in vlv_dpio_read before write again.
    -Create new hdmi/dp encoder function for chv instead of share with
	valleyview.
v4: Rebase the code after rename the DPIO registers define and upstream
	change.
    Based on Ville review.
    -For unique transition scale selection, after Ville point out, look
	 like the doc might wrong for the bit 26.  Use bit 27 for ch0 and
	 ch1.
	-Break up some dpio write value into two/three steps for readability.
	-Remove unrelated change.
    -Add some shift define for some registers instead just give the hex
	value.
    -Fix a bug where write to wrong VLV_TX_DW3.
v5: Based on Ville review.
	- Move tx lane latency optimal setting from chv_dp_pre_pll_enable to
	  chv_pre_enable_dp, and chv_hdmi_pre_pll_enable to
	  chv_hdmi_pre_enable respectively.
 	- Fix typo in one margin_reg_value for DP_TRAIN_VOLTAGE_SWING_400.
	- Clear DPIO_TX_UNIQ_TRANS_SCALE_EN for DP and HDMI.
	- Mask the old deemph and swing bits for hdmi.
v6: Remove stub for pre_pll_enable for dp and hdmi.

Signed-off-by: Chon Ming Lee <chon.ming.lee@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[vsyrjala: Don't touch panel power sequencing on DP]
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
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 12a1003..a7924d9 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1968,6 +1968,50 @@ static void vlv_dp_pre_pll_enable(struct intel_encoder *encoder)
        mutex_unlock(&dev_priv->dpio_lock);
 }
 
+static void chv_pre_enable_dp(struct intel_encoder *encoder)
+{
+       struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
+       struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
+       struct drm_device *dev = encoder->base.dev;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       struct edp_power_seq power_seq;
+       struct intel_crtc *intel_crtc =
+               to_intel_crtc(encoder->base.crtc);
+       enum dpio_channel ch = vlv_dport_to_channel(dport);
+       int pipe = intel_crtc->pipe;
+       int data, i;
+
+       /* Program Tx lane latency optimal setting*/
+       mutex_lock(&dev_priv->dpio_lock);
+       for (i = 0; i < 4; i++) {
+               /* Set the latency optimal bit */
+               data = (i == 1) ? 0x0 : 0x6;
+               vlv_dpio_write(dev_priv, pipe, CHV_TX_DW11(ch, i),
+                               data << DPIO_FRC_LATENCY_SHFIT);
+
+               /* Set the upar bit */
+               data = (i == 1) ? 0x0 : 0x1;
+               vlv_dpio_write(dev_priv, pipe, CHV_TX_DW14(ch, i),
+                               data << DPIO_UPAR_SHIFT);
+       }
+
+       /* Data lane stagger programming */
+       /* FIXME: Fix up value only after power analysis */
+
+       mutex_unlock(&dev_priv->dpio_lock);
+
+       if (is_edp(intel_dp)) {
+               /* init power sequencer on this pipe and port */
+               intel_dp_init_panel_power_sequencer(dev, intel_dp, &power_seq);
+               intel_dp_init_panel_power_sequencer_registers(dev, intel_dp,
+                                                             &power_seq);
+       }
+
+       intel_enable_dp(encoder);
+
+       vlv_wait_port_ready(dev_priv, dport);
+}
+
 /*
  * Native read with retry for link status and receiver capability reads for
  * cases where the sink may still be asleep.
@@ -2192,6 +2236,142 @@ static uint32_t intel_vlv_signal_levels(struct intel_dp *intel_dp)
        return 0;
 }
 
+static uint32_t intel_chv_signal_levels(struct intel_dp *intel_dp)
+{
+       struct drm_device *dev = intel_dp_to_dev(intel_dp);
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
+       struct intel_crtc *intel_crtc = to_intel_crtc(dport->base.base.crtc);
+       u32 deemph_reg_value, margin_reg_value, val, tx_dw2;
+       uint8_t train_set = intel_dp->train_set[0];
+       enum dpio_channel ch = vlv_dport_to_channel(dport);
+       int pipe = intel_crtc->pipe;
+
+       switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
+       case DP_TRAIN_PRE_EMPHASIS_0:
+               switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
+               case DP_TRAIN_VOLTAGE_SWING_400:
+                       deemph_reg_value = 128;
+                       margin_reg_value = 52;
+                       break;
+               case DP_TRAIN_VOLTAGE_SWING_600:
+                       deemph_reg_value = 128;
+                       margin_reg_value = 77;
+                       break;
+               case DP_TRAIN_VOLTAGE_SWING_800:
+                       deemph_reg_value = 128;
+                       margin_reg_value = 102;
+                       break;
+               case DP_TRAIN_VOLTAGE_SWING_1200:
+                       deemph_reg_value = 128;
+                       margin_reg_value = 154;
+                       /* FIXME extra to set for 1200 */
+                       break;
+               default:
+                       return 0;
+               }
+               break;
+       case DP_TRAIN_PRE_EMPHASIS_3_5:
+               switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
+               case DP_TRAIN_VOLTAGE_SWING_400:
+                       deemph_reg_value = 85;
+                       margin_reg_value = 78;
+                       break;
+               case DP_TRAIN_VOLTAGE_SWING_600:
+                       deemph_reg_value = 85;
+                       margin_reg_value = 116;
+                       break;
+               case DP_TRAIN_VOLTAGE_SWING_800:
+                       deemph_reg_value = 85;
+                       margin_reg_value = 154;
+                       break;
+               default:
+                       return 0;
+               }
+               break;
+       case DP_TRAIN_PRE_EMPHASIS_6:
+               switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
+               case DP_TRAIN_VOLTAGE_SWING_400:
+                       deemph_reg_value = 64;
+                       margin_reg_value = 104;
+                       break;
+               case DP_TRAIN_VOLTAGE_SWING_600:
+                       deemph_reg_value = 64;
+                       margin_reg_value = 154;
+                       break;
+               default:
+                       return 0;
+               }
+               break;
+       case DP_TRAIN_PRE_EMPHASIS_9_5:
+               switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
+               case DP_TRAIN_VOLTAGE_SWING_400:
+                       deemph_reg_value = 43;
+                       margin_reg_value = 154;
+                       break;
+               default:
+                       return 0;
+               }
+               break;
+       default:
+               return 0;
+       }
+
+       mutex_lock(&dev_priv->dpio_lock);
+
+       /* Clear calc init */
+       vlv_dpio_write(dev_priv, pipe, CHV_PCS_DW10(ch), 0);
+
+       /* Program swing deemph */
+       val = vlv_dpio_read(dev_priv, pipe, VLV_TX_DW4(ch));
+       val &= ~DPIO_SWING_DEEMPH9P5_MASK;
+       val |= deemph_reg_value << DPIO_SWING_DEEMPH9P5_SHIFT;
+       vlv_dpio_write(dev_priv, pipe, VLV_TX_DW4(ch), val);
+
+       /* Program swing margin */
+       tx_dw2 = vlv_dpio_read(dev_priv, pipe, VLV_TX_DW2(ch));
+       tx_dw2 &= ~DPIO_SWING_MARGIN_MASK;
+       tx_dw2 |= margin_reg_value << DPIO_SWING_MARGIN_SHIFT;
+       vlv_dpio_write(dev_priv, pipe, VLV_TX_DW2(ch), tx_dw2);
+
+       /* Disable unique transition scale */
+       val = vlv_dpio_read(dev_priv, pipe, VLV_TX_DW3(ch));
+       val &= ~DPIO_TX_UNIQ_TRANS_SCALE_EN;
+       vlv_dpio_write(dev_priv, pipe, VLV_TX_DW3(ch), val);
+
+       if (((train_set & DP_TRAIN_PRE_EMPHASIS_MASK)
+                       == DP_TRAIN_PRE_EMPHASIS_0) &&
+               ((train_set & DP_TRAIN_VOLTAGE_SWING_MASK)
+                       == DP_TRAIN_VOLTAGE_SWING_1200)) {
+
+               /*
+                * The document said it needs to set bit 27 for ch0 and bit 26
+                * for ch1. Might be a typo in the doc.
+                * For now, for this unique transition scale selection, set bit
+                * 27 for ch0 and ch1.
+                */
+               val = vlv_dpio_read(dev_priv, pipe, VLV_TX_DW3(ch));
+               val |= DPIO_TX_UNIQ_TRANS_SCALE_EN;
+               vlv_dpio_write(dev_priv, pipe, VLV_TX_DW3(ch), val);
+
+               tx_dw2 |= (0x9a << DPIO_UNIQ_TRANS_SCALE_SHIFT);
+               vlv_dpio_write(dev_priv, pipe, VLV_TX_DW2(ch), tx_dw2);
+       }
+
+       /* Start swing calculation */
+       vlv_dpio_write(dev_priv, pipe, CHV_PCS_DW10(ch),
+               (DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3));
+
+       /* LRC Bypass */
+       val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW30);
+       val |= DPIO_LRC_BYPASS;
+       vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW30, val);
+
+       mutex_unlock(&dev_priv->dpio_lock);
+
+       return 0;
+}
+
 static void
 intel_get_adjust_train(struct intel_dp *intel_dp,
                       const uint8_t link_status[DP_LINK_STATUS_SIZE])
@@ -2406,6 +2586,9 @@ intel_dp_set_signal_levels(struct intel_dp *intel_dp, uint32_t *DP)
        } else if (IS_HASWELL(dev)) {
                signal_levels = intel_hsw_signal_levels(train_set);
                mask = DDI_BUF_EMP_MASK;
+       } else if (IS_CHERRYVIEW(dev)) {
+               signal_levels = intel_chv_signal_levels(intel_dp);
+               mask = 0;
        } else if (IS_VALLEYVIEW(dev)) {
                signal_levels = intel_vlv_signal_levels(intel_dp);
                mask = 0;
@@ -4037,7 +4220,10 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
        intel_encoder->disable = intel_disable_dp;
        intel_encoder->get_hw_state = intel_dp_get_hw_state;
        intel_encoder->get_config = intel_dp_get_config;
-       if (IS_VALLEYVIEW(dev)) {
+       if (IS_CHERRYVIEW(dev)) {
+               intel_encoder->pre_enable = chv_pre_enable_dp;
+               intel_encoder->enable = vlv_enable_dp;
+       } else if (IS_VALLEYVIEW(dev)) {
                intel_encoder->pre_pll_enable = vlv_dp_pre_pll_enable;
                intel_encoder->pre_enable = vlv_pre_enable_dp;
                intel_encoder->enable = vlv_enable_dp;

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index b606162..586cee0 100644 (file)
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1224,6 +1224,85 @@ static void vlv_hdmi_post_disable(struct intel_encoder *encoder)
        mutex_unlock(&dev_priv->dpio_lock);
 }
 
+static void chv_hdmi_pre_enable(struct intel_encoder *encoder)
+{
+       struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
+       struct drm_device *dev = encoder->base.dev;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       struct intel_crtc *intel_crtc =
+               to_intel_crtc(encoder->base.crtc);
+       enum dpio_channel ch = vlv_dport_to_channel(dport);
+       int pipe = intel_crtc->pipe;
+       int data, i;
+       u32 val;
+
+       /* Program Tx latency optimal setting */
+       mutex_lock(&dev_priv->dpio_lock);
+       for (i = 0; i < 4; i++) {
+               /* Set the latency optimal bit */
+               data = (i == 1) ? 0x0 : 0x6;
+               vlv_dpio_write(dev_priv, pipe, CHV_TX_DW11(ch, i),
+                               data << DPIO_FRC_LATENCY_SHFIT);
+
+               /* Set the upar bit */
+               data = (i == 1) ? 0x0 : 0x1;
+               vlv_dpio_write(dev_priv, pipe, CHV_TX_DW14(ch, i),
+                               data << DPIO_UPAR_SHIFT);
+       }
+
+       /* Data lane stagger programming */
+       /* FIXME: Fix up value only after power analysis */
+
+       /* Clear calc init */
+       vlv_dpio_write(dev_priv, pipe, CHV_PCS_DW10(ch), 0);
+
+       /* FIXME: Program the support xxx V-dB */
+       /* Use 800mV-0dB */
+       val = vlv_dpio_read(dev_priv, pipe, VLV_TX_DW4(ch));
+       val &= ~DPIO_SWING_DEEMPH9P5_MASK;
+       val |= 128 << DPIO_SWING_DEEMPH9P5_SHIFT;
+       vlv_dpio_write(dev_priv, pipe, VLV_TX_DW4(ch), val);
+
+       val = vlv_dpio_read(dev_priv, pipe, VLV_TX_DW2(ch));
+       val &= ~DPIO_SWING_MARGIN_MASK;
+       val |= 102 << DPIO_SWING_MARGIN_SHIFT;
+       vlv_dpio_write(dev_priv, pipe, VLV_TX_DW2(ch), val);
+
+       /* Disable unique transition scale */
+       val = vlv_dpio_read(dev_priv, pipe, VLV_TX_DW3(ch));
+       val &= ~DPIO_TX_UNIQ_TRANS_SCALE_EN;
+       vlv_dpio_write(dev_priv, pipe, VLV_TX_DW3(ch), val);
+
+       /* Additional steps for 1200mV-0dB */
+#if 0
+       val = vlv_dpio_read(dev_priv, pipe, VLV_TX_DW3(ch));
+       if (ch)
+               val |= DPIO_TX_UNIQ_TRANS_SCALE_CH1;
+       else
+               val |= DPIO_TX_UNIQ_TRANS_SCALE_CH0;
+       vlv_dpio_write(dev_priv, pipe, VLV_TX_DW3(ch), val);
+
+       vlv_dpio_write(dev_priv, pipe, VLV_TX_DW2(ch),
+                       vlv_dpio_read(dev_priv, pipe, VLV_TX_DW2(ch)) |
+                               (0x9a << DPIO_UNIQ_TRANS_SCALE_SHIFT));
+#endif
+       /* Start swing calculation */
+       vlv_dpio_write(dev_priv, pipe, CHV_PCS_DW10(ch),
+                       DPIO_PCS_SWING_CALC_TX0_TX2 |
+                       DPIO_PCS_SWING_CALC_TX1_TX3);
+
+       /* LRC Bypass */
+       val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW30);
+       val |= DPIO_LRC_BYPASS;
+       vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW30, val);
+
+       mutex_unlock(&dev_priv->dpio_lock);
+
+       intel_enable_hdmi(encoder);
+
+       vlv_wait_port_ready(dev_priv, dport);
+}
+
 static void intel_hdmi_destroy(struct drm_connector *connector)
 {
        drm_connector_cleanup(connector);
@@ -1358,7 +1437,10 @@ void intel_hdmi_init(struct drm_device *dev, int hdmi_reg, enum port port)
        intel_encoder->disable = intel_disable_hdmi;
        intel_encoder->get_hw_state = intel_hdmi_get_hw_state;
        intel_encoder->get_config = intel_hdmi_get_config;
-       if (IS_VALLEYVIEW(dev)) {
+       if (IS_CHERRYVIEW(dev)) {
+               intel_encoder->pre_enable = chv_hdmi_pre_enable;
+               intel_encoder->enable = vlv_enable_hdmi;
+       } else if (IS_VALLEYVIEW(dev)) {
                intel_encoder->pre_pll_enable = vlv_hdmi_pre_pll_enable;
                intel_encoder->pre_enable = vlv_hdmi_pre_enable;
                intel_encoder->enable = vlv_enable_hdmi;