drm/i915/chv: Don't use PCS group access reads
All PCS groups access reads return 0xffffffff, so we can't use group
access for RMW cycles. Instead target each spline separately.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
[danvet: Fight conflict with misplaced ; .... ARGH!]
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 37638f8..d98de3c 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1882,13 +1882,21 @@
mutex_lock(&dev_priv->dpio_lock);
/* Propagate soft reset to data lane reset */
- val = vlv_dpio_read(dev_priv, pipe, VLV_PCS_DW1(ch));
+ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch));
val |= CHV_PCS_REQ_SOFTRESET_EN;
- vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(ch), val);
+ vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW1(ch), val);
- val = vlv_dpio_read(dev_priv, pipe, VLV_PCS_DW0(ch));
+ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW1(ch));
+ val |= CHV_PCS_REQ_SOFTRESET_EN;
+ vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW1(ch), val);
+
+ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW0(ch));
val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
- vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(ch), val);
+ vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW0(ch), val);
+
+ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW0(ch));
+ val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
+ vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW0(ch), val);
mutex_unlock(&dev_priv->dpio_lock);
}
@@ -2027,13 +2035,21 @@
mutex_lock(&dev_priv->dpio_lock);
/* Deassert soft data lane reset*/
- val = vlv_dpio_read(dev_priv, pipe, VLV_PCS_DW1(ch));
+ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch));
val |= CHV_PCS_REQ_SOFTRESET_EN;
- vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(ch), val);
+ vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW1(ch), val);
- val = vlv_dpio_read(dev_priv, pipe, VLV_PCS_DW0(ch));
+ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW1(ch));
+ val |= CHV_PCS_REQ_SOFTRESET_EN;
+ vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW1(ch), val);
+
+ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW0(ch));
val |= (DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
- vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(ch), val);
+ vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW0(ch), val);
+
+ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW0(ch));
+ val |= (DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
+ vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW0(ch), val);
/* Program Tx lane latency optimal setting*/
for (i = 0; i < 4; i++) {