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 8A565C6FA9D for ; Wed, 1 Mar 2023 14:15:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229909AbjCAOP5 (ORCPT ); Wed, 1 Mar 2023 09:15:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36214 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229501AbjCAOP4 (ORCPT ); Wed, 1 Mar 2023 09:15:56 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 035482CC47; Wed, 1 Mar 2023 06:15:56 -0800 (PST) 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 9D158612D8; Wed, 1 Mar 2023 14:15:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B6BDCC433D2; Wed, 1 Mar 2023 14:15:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1677680155; bh=67yGKOOelLpeOlZKR/e1mlM7y1TTA9eOt92/JiaBs8g=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=QiiYn58qB3G8xGjuvfAilzxQMkLAq9gcG8f3uZ1/YEfZhCe66xYzB7SOhLATl8PAn RqdpSp5nfLMghhz+gDvEDj+5TXJJfxSQrQMVjyKWOTMBMUci5p4acb6NK07/m0NKhJ xo6rISBtTeUm2tLzrGxi9A8yGgfSkCn/AtUIRrGm3dZ7YAFzDPeVK1feOjAJh+69i1 OjBzxpWuMb9MYIbUYnXW4xPemQCQpbgOpKttOY8M+eHAKdy1Qwo2gTeNPm8Wzsviqx P2vlitqOYsj37CBqm7WMVJkX/aXrU6xXTwM3rWYHabOce3Lz2edEsX7Bg/LjWUgnkQ NIGDDiIu/m5Rg== Date: Wed, 1 Mar 2023 09:15:53 -0500 From: Sasha Levin To: Johan Hovold Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, Bjorn Andersson , Kuogee Hsieh , Dmitry Baryshkov , robdclark@gmail.com, quic_abhinavk@quicinc.com, airlied@gmail.com, daniel@ffwll.ch, swboyd@chromium.org, johan+linaro@kernel.org, quic_sbillaka@quicinc.com, linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org Subject: Re: [PATCH AUTOSEL 6.2 18/60] drm/msm/dp: Remove INIT_SETUP delay Message-ID: References: <20230227020045.1045105-1-sashal@kernel.org> <20230227020045.1045105-18-sashal@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On Mon, Feb 27, 2023 at 10:12:20AM +0100, Johan Hovold wrote: >On Sun, Feb 26, 2023 at 09:00:03PM -0500, Sasha Levin wrote: >> From: Bjorn Andersson >> >> [ Upstream commit e17af1c9d861dc177e5b56009bd4f71ace688d97 ] >> >> During initalization of the DisplayPort controller an EV_HPD_INIT_SETUP >> event is generated, but with a delay of 100 units. This delay existed to >> circumvent bug in the QMP combo PHY driver, where if the DP part was >> powered up before USB, the common properties would not be properly >> initialized - and USB wouldn't work. >> >> This issue was resolved in the recent refactoring of the QMP driver, >> so it's now possible to remove this delay. >> >> While there is still a timing dependency in the current implementation, >> test indicates that it's now possible to boot with an external display >> on USB Type-C and have the display power up, without disconnecting and >> reconnecting the cable. >> >> Signed-off-by: Bjorn Andersson >> Reviewed-by: Kuogee Hsieh >> Patchwork: https://patchwork.freedesktop.org/patch/518729/ >> Link: https://lore.kernel.org/r/20230117172951.2748456-1-quic_bjorande@quicinc.com >> Signed-off-by: Dmitry Baryshkov >> Signed-off-by: Sasha Levin > >This is not a bug fix and should not be backported. Ack, I'll drop all the INIT_SETUP patches. Thanks! -- Thanks, Sasha