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 825AEC433EF for ; Mon, 2 May 2022 18:36:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244799AbiEBSkW (ORCPT ); Mon, 2 May 2022 14:40:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52032 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231752AbiEBSkV (ORCPT ); Mon, 2 May 2022 14:40:21 -0400 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C7C5F65F8 for ; Mon, 2 May 2022 11:36:51 -0700 (PDT) Received: from pendragon.ideasonboard.com (62-78-145-57.bb.dnainternet.fi [62.78.145.57]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 169A5484; Mon, 2 May 2022 20:36:50 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1651516610; bh=yaoaNhOAhbbsbhLLMHBGWoGvporF5ND1Yq8X+9irqbw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=uY4m9h5inCrZ1g09AnkLj5YrOdPggXhfWf6LuWwcQk8AGinR5Uhfe1vHnUYY+i2QJ ftm1w2Dugb49XtnuH9+62iewsyI/iXtGXZ0wRhKnq6Zm9lQxeUq99el/FEdH2rvuUZ 4hX/7H0ZU9x2SoQFz2VJNwjQxp0r7vwwcMAhgMIY= Date: Mon, 2 May 2022 21:36:49 +0300 From: Laurent Pinchart To: Javier Martinez Canillas Cc: linux-kernel@vger.kernel.org, Thomas Zimmermann , Daniel Vetter , dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Subject: Re: [PATCH v2 1/3] drm: Remove superfluous arg when calling to drm_fbdev_generic_setup() Message-ID: References: <20220502153900.408522-1-javierm@redhat.com> <20220502153900.408522-2-javierm@redhat.com> <5dd80287-1b09-d02c-9f67-5a0bb0a4566c@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, May 02, 2022 at 07:15:16PM +0200, Javier Martinez Canillas wrote: > On 5/2/22 18:55, Javier Martinez Canillas wrote: > > [snip] > > >> drop the depth option to drm_fbdev_generic_setup() ? There's a FIXME > >> comment in drm_fbdev_generic_setup() that could be related. > > > > A FIXME makes sense, I'll add that to when posting a v3. > > There's actually a FIXME already in drm_fbdev_generic_setup(), so it's > a documented issue [0]: That's what I meant by "there's a FIXME" :-) It doesn't have to be addressed by this series, but it would be good to fix it. > void drm_fbdev_generic_setup(struct drm_device *dev, > unsigned int preferred_bpp) > { > ... > /* > * FIXME: This mixes up depth with bpp, which results in a glorious > * mess, resulting in some drivers picking wrong fbdev defaults and > * others wrong preferred_depth defaults. > */ > if (!preferred_bpp) > preferred_bpp = dev->mode_config.preferred_depth; > if (!preferred_bpp) > preferred_bpp = 32; > fb_helper->preferred_bpp = preferred_bpp; > ... > } > > [0]: https://elixir.bootlin.com/linux/v5.18-rc5/source/drivers/gpu/drm/drm_fb_helper.c#L2553 -- Regards, Laurent Pinchart