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 X-Spam-Level: X-Spam-Status: No, score=-8.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_MUTT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A6F57C28CC6 for ; Wed, 5 Jun 2019 08:22:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8158F206BA for ; Wed, 5 Jun 2019 08:22:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726674AbfFEIW1 (ORCPT ); Wed, 5 Jun 2019 04:22:27 -0400 Received: from asavdk4.altibox.net ([109.247.116.15]:56330 "EHLO asavdk4.altibox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726561AbfFEIW0 (ORCPT ); Wed, 5 Jun 2019 04:22:26 -0400 Received: from ravnborg.org (unknown [158.248.194.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by asavdk4.altibox.net (Postfix) with ESMTPS id 2BD71804F9; Wed, 5 Jun 2019 10:22:23 +0200 (CEST) Date: Wed, 5 Jun 2019 10:22:21 +0200 From: Sam Ravnborg To: Vivek Gautam Cc: airlied@linux.ie, thierry.reding@gmail.com, daniel@ffwll.ch, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, bjorn.andersson@linaro.org Subject: Re: [PATCH 1/1] drm/panel: truly: Add additional delay after pulling down reset gpio Message-ID: <20190605082221.GB15169@ravnborg.org> References: <20190527102616.28315-1-vivek.gautam@codeaurora.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190527102616.28315-1-vivek.gautam@codeaurora.org> User-Agent: Mutt/1.10.1 (2018-07-13) X-CMAE-Score: 0 X-CMAE-Analysis: v=2.3 cv=VcLZwmh9 c=1 sm=1 tr=0 a=UWs3HLbX/2nnQ3s7vZ42gw==:117 a=UWs3HLbX/2nnQ3s7vZ42gw==:17 a=jpOVt7BSZ2e4Z31A5e1TngXxSK0=:19 a=kj9zAlcOel0A:10 a=LpQP-O61AAAA:8 a=e5mUnYsNAAAA:8 a=u_M7I5vmc8m8u026BJQA:9 a=CjuIK1q_8ugA:10 a=pioyyrs4ZptJ924tMmac:22 a=Vxmtnl_E_bksehYqCbjh:22 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Vivek, On Mon, May 27, 2019 at 03:56:16PM +0530, Vivek Gautam wrote: > MTP SDM845 panel seems to need additional delay to bring panel > to a workable state. Running modetest without this change displays > blurry artifacts. > > Signed-off-by: Vivek Gautam added to drm-misc-next Sam > --- > drivers/gpu/drm/panel/panel-truly-nt35597.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/gpu/drm/panel/panel-truly-nt35597.c b/drivers/gpu/drm/panel/panel-truly-nt35597.c > index fc2a66c53db4..aa7153fd3be4 100644 > --- a/drivers/gpu/drm/panel/panel-truly-nt35597.c > +++ b/drivers/gpu/drm/panel/panel-truly-nt35597.c > @@ -280,6 +280,7 @@ static int truly_35597_power_on(struct truly_nt35597 *ctx) > gpiod_set_value(ctx->reset_gpio, 1); > usleep_range(10000, 20000); > gpiod_set_value(ctx->reset_gpio, 0); > + usleep_range(10000, 20000); > > return 0; > } > -- > QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member > of Code Aurora Forum, hosted by The Linux Foundation > > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel