diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_psr.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_psr.c | 29 |
1 files changed, 12 insertions, 17 deletions
diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c index b6609e648f75..9ccff3011523 100644 --- a/drivers/gpu/drm/i915/intel_psr.c +++ b/drivers/gpu/drm/i915/intel_psr.c @@ -267,25 +267,20 @@ static void hsw_psr_enable_source(struct intel_dp *intel_dp) struct drm_i915_private *dev_priv = dev->dev_private; uint32_t max_sleep_time = 0x1f; - /* Lately it was identified that depending on panel idle frame count - * calculated at HW can be off by 1. So let's use what came - * from VBT + 1. - * There are also other cases where panel demands at least 4 - * but VBT is not being set. To cover these 2 cases lets use - * at least 5 when VBT isn't set to be on the safest side. + /* + * Let's respect VBT in case VBT asks a higher idle_frame value. + * Let's use 6 as the minimum to cover all known cases including + * the off-by-one issue that HW has in some cases. Also there are + * cases where sink should be able to train + * with the 5 or 6 idle patterns. */ - uint32_t idle_frames = dev_priv->vbt.psr.idle_frames ? - dev_priv->vbt.psr.idle_frames + 1 : 5; + uint32_t idle_frames = max(6, dev_priv->vbt.psr.idle_frames); uint32_t val = 0x0; - const uint32_t link_entry_time = EDP_PSR_MIN_LINK_ENTRY_TIME_8_LINES; - if (intel_dp->psr_dpcd[1] & DP_PSR_NO_TRAIN_ON_EXIT) { - /* Sink should be able to train with the 5 or 6 idle patterns */ - idle_frames += 4; - } + if (IS_HASWELL(dev)) + val |= EDP_PSR_MIN_LINK_ENTRY_TIME_8_LINES; I915_WRITE(EDP_PSR_CTL, val | - (IS_BROADWELL(dev) ? 0 : link_entry_time) | max_sleep_time << EDP_PSR_MAX_SLEEP_TIME_SHIFT | idle_frames << EDP_PSR_IDLE_FRAME_SHIFT | EDP_PSR_ENABLE); @@ -332,8 +327,8 @@ static bool intel_psr_match_conditions(struct intel_dp *intel_dp) return false; } - if (!IS_VALLEYVIEW(dev) && ((dev_priv->vbt.psr.full_link) || - (dig_port->port != PORT_A))) { + if (!IS_VALLEYVIEW(dev) && !IS_CHERRYVIEW(dev) && + ((dev_priv->vbt.psr.full_link) || (dig_port->port != PORT_A))) { DRM_DEBUG_KMS("PSR condition failed: Link Standby requested/needed but not supported on this platform\n"); return false; } @@ -650,7 +645,7 @@ void intel_psr_single_frame_update(struct drm_device *dev, * Single frame update is already supported on BDW+ but it requires * many W/A and it isn't really needed. */ - if (!IS_VALLEYVIEW(dev)) + if (!IS_VALLEYVIEW(dev) && !IS_CHERRYVIEW(dev)) return; mutex_lock(&dev_priv->psr.lock); |