[PATCH 22/71] drm/i915/chv: Add phy supports for Cherryview

ville.syrjala
2014-04-09T10:30:38Z

From: Chon Ming Lee <chon.ming.lee@intel.com>

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>
---
drivers/gpu/drm/i915/intel_dp.c | 188 +++++++++++++++++++++++++++++++++++++-
drivers/gpu/drm/i915/intel_hdmi.c | 84 ++++++++++++++++-
2 files changed, 270 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 6be7b35..71a4fa2 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1932,6 +1932,50 @@ 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.
@@ -2156,6 +2200,142 @@ 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])
@@ -2370,6 +2550,9 @@ 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;
@@ -3865,7 +4048,10 @@ 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 b0413e1..bbda011 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1198,6 +1198,85 @@ 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);
@@ -1332,7 +1411,10 @@ 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;
--
1.8.3.2