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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A0CEFC44501 for ; Tue, 14 Jul 2026 15:55:09 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0B4AE10EDFE; Tue, 14 Jul 2026 15:55:09 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kemnade.info header.i=@kemnade.info header.b="0PmzAdpN"; dkim-atps=neutral Received: from mail.andi.de1.cc (mail.andi.de1.cc [178.238.236.174]) by gabe.freedesktop.org (Postfix) with ESMTPS id E3B5910EDFE for ; Tue, 14 Jul 2026 15:55:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kemnade.info; s=20220719; h=References:In-Reply-To:Subject:Cc:To:From: Reply-To:Content-ID:Content-Description; bh=zLaxl7OxlxMFCnSPhkyE01FY6akqGQYk1tPfRA+r0DA=; t=1784044506; x=1785254106; b=0PmzAdpNH+22fn+aS8PP2y0877DBe1KFaTy+rJBDTqdypFMyIbsaCIru4vq6i8ajcBiCInr10wI wzM2mI9uTgoBc2c9KjUlNsvnoveWF3ZocdkNlDKt/KjyToFtoXvzppUdAg9xD4qEbcKQnetLBvIPE Tav5W6bDnJES/aBkZUiegCV6PjRL+7X9l3yfc5pjf1t110wYLHXrlZPsDVtIRDFs8FYkRpdfLZGgy aeUET0lvnlqBc1ynA9ffYRqB78lGbLNT5Z9lvrLqzIH5FtuqdGYGLgvLugseYqxk9jqRVNA8X/OXw 9ih5SaWIUPZ+bBxhSziGoFF+cdBIX5kQ2RgQ==; Date: Tue, 14 Jul 2026 17:53:37 +0200 From: Andreas Kemnade To: Ivaylo Dimitrov Cc: Tomi Valkeinen , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Sebastian Reichel , Laurent Pinchart , Tony Lindgren , Linux-OMAP , Marek Vasut , "H. Nikolaus Schaller" , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Tomi Valkeinen Subject: Re: [PATCH v4] drm/omap: dsi: avoid sending bta sync all the time in writes Message-ID: <20260714175337.4ad430fc@akphone> In-Reply-To: <24368e1c-171f-4f6b-80f8-58accab1d3be@gmail.com> References: <20260629-vm-upstr-v4-1-9f0c62d8808e@kemnade.info> <4cb964d9-524d-40ec-8cd2-d936fff8eb85@gmail.com> <20260707122203.0bbc973e@kemnade.info> <24368e1c-171f-4f6b-80f8-58accab1d3be@gmail.com> X-Mailer: Claws Mail 4.4.0 (GTK 3.24.52; aarch64-alpine-linux-musl) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Sun, 12 Jul 2026 22:07:53 +0300 Ivaylo Dimitrov wrote: > > > > diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c > > b/drivers/gpu/drm/omapdrm/dss/dsi.c index > > 3f22929c36e2..eb3cd0d23cae 100644 --- > > a/drivers/gpu/drm/omapdrm/dss/dsi.c +++ > > b/drivers/gpu/drm/omapdrm/dss/dsi.c @@ -3267,7 +3267,7 @@ static > > int dsi_update_channel(struct omap_dss_device *dssdev, int vc) > > * updates stop working. This is probably related to DSI > > spec stating > > * that the DSI host should transition to LP at least > > once per frame. */ > > - r = dsi_vc_send_bta_sync(dssdev, vc); > > + r = dsi_vc_send_bta_sync(dssdev, VC_CMD); > > if (r < 0) { > > DSSWARN("failed to send bta sync between frames: > > %d\n", r); goto err; > > > > > > > > Then the call is equal to the original one done via send_nnop. > > > > With that change it seems to work properly, will keep that version of > the driver for the time being. will send a v5 with this change included Regards, Andreas