From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Try to force the PHY clock buffer enables to make the clock routing
work.
v2: Fix the pipe B case to actually enable CH0 clock buffers
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_reg.h | 18 ++++++++++++++++++
drivers/gpu/drm/i915/intel_dp.c | 19 +++++++++++++++++++
drivers/gpu/drm/i915/intel_hdmi.c | 19 +++++++++++++++++++
3 files changed, 56 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index c8aa70f..d97f68e 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -798,6 +798,16 @@ enum punit_power_well {
#define DPIO_CHV_PROP_COEFF_SHIFT 0
#define CHV_PLL_DW6(ch) _PIPE(ch, _CHV_PLL_DW6_CH0, _CHV_PLL_DW6_CH1)
+#define _CHV_CMN_DW5_CH0 0x8114
+#define CHV_BUFRIGHTENA1_DISABLE (0 << 20)
+#define CHV_BUFRIGHTENA1_NORMAL (1 << 20)
+#define CHV_BUFRIGHTENA1_FORCE (3 << 20)
+#define CHV_BUFRIGHTENA1_MASK (3 << 20)
+#define CHV_BUFLEFTENA1_DISABLE (0 << 22)
+#define CHV_BUFLEFTENA1_NORMAL (1 << 22)
+#define CHV_BUFLEFTENA1_FORCE (3 << 22)
+#define CHV_BUFLEFTENA1_MASK (3 << 22)
+
#define _CHV_CMN_DW13_CH0 0x8134
#define _CHV_CMN_DW0_CH1 0x8080
#define DPIO_CHV_S1_DIV_SHIFT 21
@@ -812,6 +822,14 @@ enum punit_power_well {
#define _CHV_CMN_DW1_CH1 0x8084
#define DPIO_AFC_RECAL (1 << 14)
#define DPIO_DCLKP_EN (1 << 13)
+#define CHV_BUFLEFTENA2_DISABLE (0 << 17) /* CL2 DW1 only */
+#define CHV_BUFLEFTENA2_NORMAL (1 << 17) /* CL2 DW1 only */
+#define CHV_BUFLEFTENA2_FORCE (3 << 17) /* CL2 DW1 only */
+#define CHV_BUFLEFTENA2_MASK (3 << 17) /* CL2 DW1 only */
+#define CHV_BUFRIGHTENA2_DISABLE (0 << 19) /* CL2 DW1 only */
+#define CHV_BUFRIGHTENA2_NORMAL (1 << 19) /* CL2 DW1 only */
+#define CHV_BUFRIGHTENA2_FORCE (3 << 19) /* CL2 DW1 only */
+#define CHV_BUFRIGHTENA2_MASK (3 << 19) /* CL2 DW1 only */
#define CHV_CMN_DW14(ch) _PIPE(ch, _CHV_CMN_DW14_CH0, _CHV_CMN_DW1_CH1)
#define _CHV_CMN_DW19_CH0 0x814c
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 78fa387..dc823e1 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2059,6 +2059,25 @@ static void chv_dp_pre_pll_enable(struct intel_encoder *encoder)
mutex_lock(&dev_priv->dpio_lock);
+ /* program left/right clock distribution */
+ if (pipe != PIPE_B) {
+ val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW5_CH0);
+ val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK);
+ if (ch == DPIO_CH0)
+ val |= CHV_BUFLEFTENA1_FORCE;
+ if (ch == DPIO_CH1)
+ val |= CHV_BUFRIGHTENA1_FORCE;
+ vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW5_CH0, val);
+ } else {
+ val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW1_CH1);
+ val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK);
+ if (ch == DPIO_CH0)
+ val |= CHV_BUFLEFTENA2_FORCE;
+ if (ch == DPIO_CH1)
+ val |= CHV_BUFRIGHTENA2_FORCE;
+ vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val);
+ }
+
/* program clock channel usage */
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(ch));
val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 0173250..debb2ee 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1224,6 +1224,25 @@ static void chv_hdmi_pre_pll_enable(struct intel_encoder *encoder)
mutex_lock(&dev_priv->dpio_lock);
+ /* program left/right clock distribution */
+ if (pipe != PIPE_B) {
+ val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW5_CH0);
+ val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK);
+ if (ch == DPIO_CH0)
+ val |= CHV_BUFLEFTENA1_FORCE;
+ if (ch == DPIO_CH1)
+ val |= CHV_BUFRIGHTENA1_FORCE;
+ vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW5_CH0, val);
+ } else {
+ val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW1_CH1);
+ val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK);
+ if (ch == DPIO_CH0)
+ val |= CHV_BUFLEFTENA2_FORCE;
+ if (ch == DPIO_CH1)
+ val |= CHV_BUFRIGHTENA2_FORCE;
+ vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val);
+ }
+
/* program clock channel usage */
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(ch));
val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
--
1.8.5.5
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