v2: Use VBT + 1 as suggested by Arthur. So this patch depends on PSR VBT block parsing. Reference: hsdhsw/4394433 Cc: Arthur Runyan <arthur.j.runyan@xxxxxxxxx> Cc: Jani Nikula <jani.nikula@xxxxxxxxx> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> --- drivers/gpu/drm/i915/intel_dp.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index ceb528f..9f2000b 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -2174,7 +2174,12 @@ static void intel_edp_psr_enable_source(struct intel_dp *intel_dp) struct drm_device *dev = dig_port->base.base.dev; struct drm_i915_private *dev_priv = dev->dev_private; uint32_t max_sleep_time = 0x1f; - uint32_t idle_frames = 1; + /* 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 and at minimum 2 to be on the safe side. + */ + uint32_t idle_frames = dev_priv->vbt.psr.idle_frames ? + dev_priv->vbt.psr.idle_frames + 1 : 2; uint32_t val = 0x0; const uint32_t link_entry_time = EDP_PSR_MIN_LINK_ENTRY_TIME_8_LINES; bool only_standby = false; -- 1.9.3 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
