diff options
| author | Paulo Zanoni <paulo.r.zanoni@intel.com> | 2013-11-02 21:07:43 -0700 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-11-08 18:09:57 +0100 |
| commit | 8f93f4f1e8612e8d13fa4a5b3373aa7a87f93b31 (patch) | |
| tree | 709fe432aa3c089793d8a2f94cff88009ef2dfc1 /drivers/gpu/drm/i915/intel_dp.c | |
| parent | 300644c7dc4699fe9afb61b280aa5ed7109a4d93 (diff) | |
drm/i915/bdw: add support for BDW DP voltage swings and pre-emphasis
They're not the same as the Haswell ones.
Reviewed-by: Art Runyan <arthur.j.runyan@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Todd Previte <tprevite@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 55 |
1 files changed, 52 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 7619eae35b2..f39856e1209 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1958,7 +1958,7 @@ intel_dp_voltage_max(struct intel_dp *intel_dp) struct drm_device *dev = intel_dp_to_dev(intel_dp); enum port port = dp_to_dig_port(intel_dp)->port; - if (IS_VALLEYVIEW(dev)) + if (IS_VALLEYVIEW(dev) || IS_BROADWELL(dev)) return DP_TRAIN_VOLTAGE_SWING_1200; else if (IS_GEN7(dev) && port == PORT_A) return DP_TRAIN_VOLTAGE_SWING_800; @@ -1974,7 +1974,18 @@ intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, uint8_t voltage_swing) struct drm_device *dev = intel_dp_to_dev(intel_dp); enum port port = dp_to_dig_port(intel_dp)->port; - if (HAS_DDI(dev)) { + if (IS_BROADWELL(dev)) { + switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { + case DP_TRAIN_VOLTAGE_SWING_400: + case DP_TRAIN_VOLTAGE_SWING_600: + return DP_TRAIN_PRE_EMPHASIS_6; + case DP_TRAIN_VOLTAGE_SWING_800: + return DP_TRAIN_PRE_EMPHASIS_3_5; + case DP_TRAIN_VOLTAGE_SWING_1200: + default: + return DP_TRAIN_PRE_EMPHASIS_0; + } + } else if (IS_HASWELL(dev)) { switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { case DP_TRAIN_VOLTAGE_SWING_400: return DP_TRAIN_PRE_EMPHASIS_9_5; @@ -2286,6 +2297,41 @@ intel_hsw_signal_levels(uint8_t train_set) } } +static uint32_t +intel_bdw_signal_levels(uint8_t train_set) +{ + int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | + DP_TRAIN_PRE_EMPHASIS_MASK); + switch (signal_levels) { + case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: + return DDI_BUF_EMP_400MV_0DB_BDW; /* Sel0 */ + case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: + return DDI_BUF_EMP_400MV_3_5DB_BDW; /* Sel1 */ + case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: + return DDI_BUF_EMP_400MV_6DB_BDW; /* Sel2 */ + + case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: + return DDI_BUF_EMP_600MV_0DB_BDW; /* Sel3 */ + case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: + return DDI_BUF_EMP_600MV_3_5DB_BDW; /* Sel4 */ + case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_6: + return DDI_BUF_EMP_600MV_6DB_BDW; /* Sel5 */ + + case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: + return DDI_BUF_EMP_800MV_0DB_BDW; /* Sel6 */ + case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: + return DDI_BUF_EMP_800MV_3_5DB_BDW; /* Sel7 */ + + case DP_TRAIN_VOLTAGE_SWING_1200 | DP_TRAIN_PRE_EMPHASIS_0: + return DDI_BUF_EMP_1200MV_0DB_BDW; /* Sel8 */ + + default: + DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" + "0x%x\n", signal_levels); + return DDI_BUF_EMP_400MV_0DB_BDW; /* Sel0 */ + } +} + /* Properly updates "DP" with the correct signal levels. */ static void intel_dp_set_signal_levels(struct intel_dp *intel_dp, uint32_t *DP) @@ -2296,7 +2342,10 @@ intel_dp_set_signal_levels(struct intel_dp *intel_dp, uint32_t *DP) uint32_t signal_levels, mask; uint8_t train_set = intel_dp->train_set[0]; - if (HAS_DDI(dev)) { + if (IS_BROADWELL(dev)) { + signal_levels = intel_bdw_signal_levels(train_set); + mask = DDI_BUF_EMP_MASK; + } else if (IS_HASWELL(dev)) { signal_levels = intel_hsw_signal_levels(train_set); mask = DDI_BUF_EMP_MASK; } else if (IS_VALLEYVIEW(dev)) { |