From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E22DCC77B78 for ; Mon, 24 Apr 2023 13:21:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231963AbjDXNVJ (ORCPT ); Mon, 24 Apr 2023 09:21:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44788 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231992AbjDXNVC (ORCPT ); Mon, 24 Apr 2023 09:21:02 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 28DFA55BF for ; Mon, 24 Apr 2023 06:20:48 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id B875D621D9 for ; Mon, 24 Apr 2023 13:20:47 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C997BC433D2; Mon, 24 Apr 2023 13:20:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1682342447; bh=CAY6dvryIBjk490gspnEFhpKuyrOitYWKoW4xe/B08k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SZ+C8bjqZuWeWBGl1X/5I7itc1RQZO+sF4tLbQcAR8kg+Dnxx3IBtumljroxxmAw2 IA0r6xzU6kt34UjuCa64oJdUetzg6Qg/miAOUN+cKT34acdCPhWcwXIeOxrUbS3U2R VrMmuThecpSuC2RjMNmMqPdUN8JIYlaUtq9kavPU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, =?UTF-8?q?Jouni=20H=C3=B6gander?= , =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= , Jani Nikula Subject: [PATCH 5.15 42/73] drm/i915: Fix fast wake AUX sync len Date: Mon, 24 Apr 2023 15:16:56 +0200 Message-Id: <20230424131130.518891922@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230424131129.040707961@linuxfoundation.org> References: <20230424131129.040707961@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Ville Syrjälä 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 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 --- drivers/gpu/drm/i915/display/intel_dp_aux.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/i915/display/intel_dp_aux.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux.c @@ -167,7 +167,7 @@ static u32 skl_get_aux_send_ctl(struct i 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_phy_is_tc(i915, phy) &&