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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 67F71C433F5 for ; Mon, 4 Oct 2021 07:28:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4D5946126A for ; Mon, 4 Oct 2021 07:28:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230179AbhJDHaN (ORCPT ); Mon, 4 Oct 2021 03:30:13 -0400 Received: from honk.sigxcpu.org ([24.134.29.49]:34370 "EHLO honk.sigxcpu.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230195AbhJDHaG (ORCPT ); Mon, 4 Oct 2021 03:30:06 -0400 Received: from localhost (localhost [127.0.0.1]) by honk.sigxcpu.org (Postfix) with ESMTP id 50CCBFB02; Mon, 4 Oct 2021 09:28:16 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at honk.sigxcpu.org Received: from honk.sigxcpu.org ([127.0.0.1]) by localhost (honk.sigxcpu.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id sYVkJr4AioKx; Mon, 4 Oct 2021 09:28:14 +0200 (CEST) From: =?UTF-8?q?Guido=20G=C3=BCnther?= To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , David Airlie , Daniel Vetter , Marek Vasut , Stefan Agner , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Thierry Reding , Sam Ravnborg , Ondrej Jirman , Lucas Stach , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 5/5] drm: mxsfb: Set proper default bus format when using a bridge Date: Mon, 4 Oct 2021 09:27:38 +0200 Message-Id: <15afbcb04dea432867bb9f8b0e47205decd4bd6e.1633332399.git.agx@sigxcpu.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If a bridge doesn't do any bus format handling MEDIA_BUS_FMT_FIXED is returned. Fallback to a reasonable default (MEDIA_BUS_FMT_RGB888_1X24) in that case. This unbreaks e.g. using mxsfb with the nwl bridge and mipi panels. Fixes: b776b0f00f24 ("drm: mxsfb: Use bus_format from the nearest bridge if present") Reported-by: Martin Kepplinger Signed-off-by: Guido Günther --- drivers/gpu/drm/mxsfb/mxsfb_kms.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/mxsfb/mxsfb_kms.c b/drivers/gpu/drm/mxsfb/mxsfb_kms.c index d6abd2077114..e3fbb8b58d5d 100644 --- a/drivers/gpu/drm/mxsfb/mxsfb_kms.c +++ b/drivers/gpu/drm/mxsfb/mxsfb_kms.c @@ -369,6 +369,12 @@ static void mxsfb_crtc_atomic_enable(struct drm_crtc *crtc, drm_atomic_get_new_bridge_state(state, mxsfb->bridge); bus_format = bridge_state->input_bus_cfg.format; + if (bus_format == MEDIA_BUS_FMT_FIXED) { + dev_warn_once(drm->dev, + "Bridge does not provide bus format, assuming MEDIA_BUS_FMT_RGB888_1X24.\n" + "Please fix bridge driver by handling atomic_get_input_bus_fmts.\n"); + bus_format = MEDIA_BUS_FMT_RGB888_1X24; + } } /* If there is no bridge, use bus format from connector */ -- 2.33.0