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 C1CA3C433EF for ; Tue, 8 Feb 2022 15:40:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1381384AbiBHPk0 (ORCPT ); Tue, 8 Feb 2022 10:40:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51754 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1381201AbiBHPkU (ORCPT ); Tue, 8 Feb 2022 10:40:20 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id A56FCC061578 for ; Tue, 8 Feb 2022 07:40:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1644334818; 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=R3+ygx7WT3LgjARaNLFe1zhALwKjcISILkzjd4t3g78=; b=PJPCIyjCr7oQuV7Ckv0+Lx4GaA+VdczlDgrrZqgo8B+BUyaPkE3F36t4evjS5zrYgDZyyL Om0EctAkiL/w/3k/S807Rdtnd57Q1ZAMrMalSGTCDfsZ8i8oeGsL/34a6lYAeODDcJxLTl 4EuLDsmPAZAhBsIZ7+JMef/KUj8aE80= Received: from mail-wm1-f69.google.com (mail-wm1-f69.google.com [209.85.128.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-557-12iaTEKxNLGeErdsFaiqSw-1; Tue, 08 Feb 2022 10:40:15 -0500 X-MC-Unique: 12iaTEKxNLGeErdsFaiqSw-1 Received: by mail-wm1-f69.google.com with SMTP id a17-20020a05600c069100b0037bb7eb6944so554621wmn.2 for ; Tue, 08 Feb 2022 07:40:15 -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=R3+ygx7WT3LgjARaNLFe1zhALwKjcISILkzjd4t3g78=; b=2x9qgLvTNrsvGIgOh+q89M2vd7ZnD39CcKhB3+Cq7mNCYk3sRrtxgUyJs4YH7H0NS9 PoGRyMdBFll+nvRTrZXARGoZqI7su9cJX1dvJg2UqCghhG1SMk/ZAH6tZpZKNSMM8XDx LOGqWExs6IWsOeNumZ2xqunDsvc++BFE5r/uJZ8mPleUs4RDkVfCSTG8WK2l58/19qZ4 zEyHr8iZ20CMgCpThLIP8qP2GcQrS1o4FJ5EMtvW6dF4ajI7EgtxT8Bfrp+HhOjxk5xM 9g12ByNGHT+soZ1oVtx6I3tH4bdTBDeL9W8Yjdp5gLfFnk9xkW14jeV6tjIAau/svGuf LI4g== X-Gm-Message-State: AOAM532nkVALsuo0ncZzJByn7QVMmM62MZuG/pvu77+svGRjvxBPRAVx PSmmxX0jnIcx7d2LW4A7GRm5fA0gI5K+zVcNdANSL4jJDdDBxHT/ayfmniVbTZBrcGl4i+AhknR ujfxdlJgCwPwqUtUH9G1oKin+ X-Received: by 2002:a5d:588e:: with SMTP id n14mr4244922wrf.45.1644334814512; Tue, 08 Feb 2022 07:40:14 -0800 (PST) X-Google-Smtp-Source: ABdhPJwgsRW+lrC/D9yn6NeNRRQqunCaYEb9CMC26g+Mn3KPfiRrXRhLKFGC8C3j1dq2BkDZsEKSLg== X-Received: by 2002:a5d:588e:: with SMTP id n14mr4244901wrf.45.1644334814281; Tue, 08 Feb 2022 07:40:14 -0800 (PST) Received: from [192.168.1.102] ([92.176.231.205]) by smtp.gmail.com with ESMTPSA id v18sm9972089wrm.105.2022.02.08.07.40.12 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 08 Feb 2022 07:40:14 -0800 (PST) Message-ID: <02d5b225-e1a8-77f6-7e4e-18d6a1df5e48@redhat.com> Date: Tue, 8 Feb 2022 16:40:12 +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 v2 0/4] drm/tiny: Add driver for Solomon SSD1307 OLED displays Content-Language: en-US To: Geert Uytterhoeven Cc: "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , Linux Fbdev development list , Linux PWM List , David Airlie , Daniel Vetter , Mark Brown , Linux Kernel Mailing List , DRI Development , Liam Girdwood , Rob Herring , =?UTF-8?Q?Noralf_Tr=c3=b8nnes?= , Thierry Reding , Maxime Ripard , Thomas Zimmermann , =?UTF-8?Q?Uwe_Kleine-K=c3=b6nig?= , Lee Jones , Andy Shevchenko , Sam Ravnborg References: <20220204134347.1187749-1-javierm@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-kernel@vger.kernel.org On 2/8/22 16:23, Geert Uytterhoeven wrote: [snip] >>> - The logo (I have a custom monochrome logo enabled) is no longer shown. >> >> I was able to display your tux monochrome with ./fbtest -f /dev/fb1 test004 > > I meant the kernel's logo (FB_LOGO_*),. Obviously you need to enable > a smaller one, as the default 80x80 logo is too large, and thus can't > be drawn on your 128x64 or my 128x32 display. > That makes sense. >>> - The screen is empty, with a (very very slow) flashing cursor in the >>> middle of the screen, with a bogus long line next to it, which I can >>> see being redrawn. >>> - Writing text (e.g. hello) to /dev/tty0, I first see the text, >>> followed by an enlargement of some of the characters. >> >> So far I was mostly testing using your fbtest repo tests and all of them >> (modulo test009 that says "Screen size too small for this test"). >> >> But I've tried now using as a VT and I see the same visual artifacts. I >> wonder what's the difference between fbcon and the way your tests use >> the fbdev API. > > Fbcon does small writes to the shadow frame buffer, while fbtest > writes to the mmap()ed /dev/fbX, causing a full page to be updated. > I see. Thanks for the information. Best regards, -- Javier Martinez Canillas Linux Engineering Red Hat