From fea91b573ab9efe98961324279afa332aeb8ee50 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Wed, 29 Mar 2023 20:24:33 +0300 Subject: [PATCH] UPSTREAM: drm/i915: Fix fast wake AUX sync len MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit commit e1c71f8f918047ce822dc19b42ab1261ed259fd1 upstream. Fast wake should use 8 SYNC pulses for the preamble and 10-16 SYNC pulses for the precharge. Reduce our fast wake SYNC count to match the maximum value. We also use the maximum precharge length for normal AUX transactions. Cc: stable@vger.kernel.org Cc: Jouni Högander Change-Id: Iaa1ca424e1758a938aa960891141715c3ec46e14 Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20230329172434.18744-1-ville.syrjala@linux.intel.com Reviewed-by: Jouni Högander (cherry picked from commit 605f7c73133341d4b762cbd9a22174cc22d4c38b) Signed-off-by: Jani Nikula Signed-off-by: Greg Kroah-Hartman (cherry picked from commit 66eb772be27e228716bb81feee0400d995cbe605) Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/display/intel_dp_aux.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux.c b/drivers/gpu/drm/i915/display/intel_dp_aux.c index 48c375c65a41..7f3f2d50e6cd 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux.c @@ -165,7 +165,7 @@ static u32 skl_get_aux_send_ctl(struct intel_dp *intel_dp, DP_AUX_CH_CTL_TIME_OUT_MAX | DP_AUX_CH_CTL_RECEIVE_ERROR | (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | - DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(32) | + DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(24) | DP_AUX_CH_CTL_SYNC_PULSE_SKL(32); if (intel_tc_port_in_tbt_alt_mode(dig_port))