drm/i915: Unduplicate CHV signal level code
The code for programming voltage swing and emphasis was duplicated
between DP and HDMI code. Move that to a new file, intel_dpio_phy.c.
v2: Keep the "Use 800mV-0dB" comment in the HDMI code. (Ville)
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Jim Bride <jim.bride@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1461761065-21195-3-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 6bb0b23..4fe92e0 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -3309,23 +3309,12 @@
return 0;
}
-static bool chv_need_uniq_trans_scale(uint8_t train_set)
-{
- return (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) == DP_TRAIN_PRE_EMPH_LEVEL_0 &&
- (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) == DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
-}
-
static uint32_t 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;
+ struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
+ u32 deemph_reg_value, margin_reg_value;
+ bool uniq_trans_scale = false;
uint8_t train_set = intel_dp->train_set[0];
- enum dpio_channel ch = vlv_dport_to_channel(dport);
- enum pipe pipe = intel_crtc->pipe;
- int i;
switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
case DP_TRAIN_PRE_EMPH_LEVEL_0:
@@ -3345,7 +3334,7 @@
case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
deemph_reg_value = 128;
margin_reg_value = 154;
- /* FIXME extra to set for 1200 */
+ uniq_trans_scale = true;
break;
default:
return 0;
@@ -3397,88 +3386,8 @@
return 0;
}
- mutex_lock(&dev_priv->sb_lock);
-
- /* Clear calc init */
- val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));
- val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);
- val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);
- val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;
- vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);
-
- if (intel_crtc->config->lane_count > 2) {
- val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));
- val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);
- val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);
- val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;
- vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);
- }
-
- val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW9(ch));
- val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);
- val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;
- vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW9(ch), val);
-
- if (intel_crtc->config->lane_count > 2) {
- val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW9(ch));
- val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);
- val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;
- vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW9(ch), val);
- }
-
- /* Program swing deemph */
- for (i = 0; i < intel_crtc->config->lane_count; i++) {
- val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW4(ch, i));
- val &= ~DPIO_SWING_DEEMPH9P5_MASK;
- val |= deemph_reg_value << DPIO_SWING_DEEMPH9P5_SHIFT;
- vlv_dpio_write(dev_priv, pipe, CHV_TX_DW4(ch, i), val);
- }
-
- /* Program swing margin */
- for (i = 0; i < intel_crtc->config->lane_count; i++) {
- val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW2(ch, i));
-
- val &= ~DPIO_SWING_MARGIN000_MASK;
- val |= margin_reg_value << DPIO_SWING_MARGIN000_SHIFT;
-
- /*
- * Supposedly this value shouldn't matter when unique transition
- * scale is disabled, but in fact it does matter. Let's just
- * always program the same value and hope it's OK.
- */
- val &= ~(0xff << DPIO_UNIQ_TRANS_SCALE_SHIFT);
- val |= 0x9a << DPIO_UNIQ_TRANS_SCALE_SHIFT;
-
- vlv_dpio_write(dev_priv, pipe, CHV_TX_DW2(ch, i), val);
- }
-
- /*
- * 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.
- */
- for (i = 0; i < intel_crtc->config->lane_count; i++) {
- val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW3(ch, i));
- if (chv_need_uniq_trans_scale(train_set))
- val |= DPIO_TX_UNIQ_TRANS_SCALE_EN;
- else
- val &= ~DPIO_TX_UNIQ_TRANS_SCALE_EN;
- vlv_dpio_write(dev_priv, pipe, CHV_TX_DW3(ch, i), val);
- }
-
- /* Start swing calculation */
- val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));
- val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;
- vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);
-
- if (intel_crtc->config->lane_count > 2) {
- val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));
- val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;
- vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);
- }
-
- mutex_unlock(&dev_priv->sb_lock);
+ chv_set_phy_signal_level(encoder, deemph_reg_value,
+ margin_reg_value, uniq_trans_scale);
return 0;
}