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| author | David S. Miller <davem@davemloft.net> | 2016-09-23 10:46:57 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-09-23 10:46:57 (GMT) |
| commit | d6989d4bbe6c4d1c2a76696833a07f044e85694d (patch) | |
| tree | 2d9a70d0feee4d4a20568be1b39a961fa0d27d81 /drivers/gpu/drm/i915/intel_psr.c | |
| parent | 0364a8824c020f12e2d5e9fad963685b58f7574e (diff) | |
| parent | b1f2beb87bb034bb209773807994279f90cace78 (diff) | |
| download | linux-d6989d4bbe6c4d1c2a76696833a07f044e85694d.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'drivers/gpu/drm/i915/intel_psr.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_psr.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c index 2b0d1ba..cf171b4 100644 --- a/drivers/gpu/drm/i915/intel_psr.c +++ b/drivers/gpu/drm/i915/intel_psr.c @@ -255,14 +255,14 @@ static void hsw_psr_enable_source(struct intel_dp *intel_dp) struct drm_i915_private *dev_priv = to_i915(dev); 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 + 1; + uint32_t idle_frames = max(6, dev_priv->vbt.psr.idle_frames); uint32_t val = EDP_PSR_ENABLE; val |= max_sleep_time << EDP_PSR_MAX_SLEEP_TIME_SHIFT; |