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 D4AF1C433F5 for ; Wed, 2 Feb 2022 11:39:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238973AbiBBLjg (ORCPT ); Wed, 2 Feb 2022 06:39:36 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:25774 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230155AbiBBLje (ORCPT ); Wed, 2 Feb 2022 06:39:34 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1643801974; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=udGfbFsD3WjS9bv8IIFrQcIv1RwbGFk7ab6Qa1eMKEE=; b=Bg6r97C51QpJwbqu7TlwIIR815gx4ev2ec39cX9RhT7lTnH2QbPUklB9gCpDszLU/c3tl8 Q+AFwMrDmzM525W9buVa3TXUMB+7g6pt9ab2ZexshMwH1c7Q/C/PGkUEoIwHH3qflU51dx oLgLTrWwFaWkl/Yb93+EqdCGKbpLAnM= Received: from mail-wr1-f71.google.com (mail-wr1-f71.google.com [209.85.221.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-363--DGxKmobOuKlpYOyjY9QMg-1; Wed, 02 Feb 2022 06:39:33 -0500 X-MC-Unique: -DGxKmobOuKlpYOyjY9QMg-1 Received: by mail-wr1-f71.google.com with SMTP id e15-20020adf9bcf000000b001de055937d4so6719175wrc.13 for ; Wed, 02 Feb 2022 03:39:33 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=udGfbFsD3WjS9bv8IIFrQcIv1RwbGFk7ab6Qa1eMKEE=; b=K3+pqAy1PhgqF4DZ535fIK1krFoC8hbLJ1dVDL6K5UEcyIvRww/C8bhnPOq7XT7+dT l1uwqyaYR1Qe5U1p599opNA2b39jq83uyTBkqhEcFjHF7jIm3RRKomtId9yFho8v3O8X NVnwZc+HiscPCVbUS138d0hDL0CoUdTCMCg9udRh2yoA2noJ3M+FZlOlKh8J0UdD/MUl FriqDDsbJRv3XfhKhw9KjEk4rith5y8/LOUrmFxx1ZRpRGRMNERScZL3vLCJQPeNIXmf QlxouCKxB46gzLeHxgiCZy3ApMXBgK4WigNxI3+75s3/0xMPhrsVivMYZ4ny55p7uOr3 OHCA== X-Gm-Message-State: AOAM533zi1pDmNB2i8bSXUiToupYrizkoiUvARAFf6ftDvYnwJ0zZS5F O71NcohM3WDHw0/lXeC1eaxdPkYWw7KKmaDnP7rzxmTuAdoXBCaeMh70YtpU2QFswU29878j8cy 397xJH13If9VW39sA2pKx X-Received: by 2002:a05:6000:1707:: with SMTP id n7mr25289513wrc.234.1643801972289; Wed, 02 Feb 2022 03:39:32 -0800 (PST) X-Google-Smtp-Source: ABdhPJzIYnUCCInjr37c9/22HdQPcKzX7C106buTPKlsAaiTOOtU5+XcopMUfetRz5oizfbknnWbWw== X-Received: by 2002:a05:6000:1707:: with SMTP id n7mr25289493wrc.234.1643801972038; Wed, 02 Feb 2022 03:39:32 -0800 (PST) Received: from [192.168.1.102] ([92.176.231.205]) by smtp.gmail.com with ESMTPSA id m11sm4097810wmi.16.2022.02.02.03.39.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 02 Feb 2022 03:39:31 -0800 (PST) Message-ID: <2f149fef-b991-9e34-98cb-426e561192ff@redhat.com> Date: Wed, 2 Feb 2022 12:39:29 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: [PATCH 0/4] drm/tiny: Add driver for Solomon SSD1307 OLED displays Content-Language: en-US To: Andy Shevchenko Cc: Sam Ravnborg , Geert Uytterhoeven , Linux Kernel Mailing List , Linux PWM List , Linux Fbdev development list , Thomas Zimmermann , David Airlie , Daniel Vetter , Mark Brown , DRI Development , Liam Girdwood , =?UTF-8?Q?Noralf_Tr=c3=b8nnes?= , Maxime Ripard , =?UTF-8?Q?Uwe_Kleine-K=c3=b6nig?= , Thierry Reding , Lee Jones , Peter Robinson References: <20220131201225.2324984-1-javierm@redhat.com> <51f54519-bb8b-f108-1c1e-4fed101ca5ef@redhat.com> From: Javier Martinez Canillas In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-pwm@vger.kernel.org Hello Andy, On 2/2/22 12:06, Andy Shevchenko wrote: > On Wed, Feb 02, 2022 at 09:38:51AM +0100, Javier Martinez Canillas wrote: >> On 2/1/22 21:40, Sam Ravnborg wrote: > > ... > >> Peter Robinson suggested to >> make the driver mutually exclusive and add !FB_SSD1307 in the config symbol. > > And how will distros choose "the right" option in this case? It depends on the distro. In Fedora we are disabling *all* the fbdev drivers. > What to do when I wan to see a regression and I want to change drivers w/o > recompilation? > If you want to have the two drivers without recompilation (and same compatible to match) then how would kmod / udev choose which one to load ? It becomes a race condition between the two drivers which one probes first. > NAK from me to that proposal. > What's your suggestion then to solve the issue mentioned above ? With my distro maintainer hat I don't care that much, since the fbdev drivers will be disabled. Best regards, -- Javier Martinez Canillas Linux Engineering Red Hat