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 A1D48C433EF for ; Tue, 8 Feb 2022 15:40:20 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D2D0910E64E; Tue, 8 Feb 2022 15:40:19 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id 112E910E64E for ; Tue, 8 Feb 2022 15:40:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1644334816; 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=QrBnP80borMCiE9iMIYH0/RL+5dFSfYpD2wxs02qMZFaeCYJRgeAuHDrlEpf8YzRGS2Y0T +jgpSyp+MOifsvLvBjyA+TvQCSoSjXRkKHGPvFMUNEGDrGXTiVsONPs/yz7yChXnMvjEAS 9nF+157J6zhEEr8TrSh2SjNhn0OF0z0= Received: from mail-wr1-f70.google.com (mail-wr1-f70.google.com [209.85.221.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-48-gOc3cbvxN2e5qnZHyz6-Zg-1; Tue, 08 Feb 2022 10:40:15 -0500 X-MC-Unique: gOc3cbvxN2e5qnZHyz6-Zg-1 Received: by mail-wr1-f70.google.com with SMTP id p9-20020adf9589000000b001e333885ac1so1382988wrp.10 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=BiBvjxnUEufR+GctQqRTOolCg8huEvOHcCwva4YbnV90yme5uS5MJTlrXOc1z7ksn2 y1tkjCuhfNOzk6xI8/g5+0a7a4VOnlY3/yqDWeZsyfTBQuFnAY7GRbIuNp831tnCJ0hi U99Hx+y5anGIqnr864x8mU1Faq8FbokCYbCfmPOGZE7SR+fIU4/C4iqQe40+C4ZcLUxq hnZ5QshU5i4oQDmJIYjXHP1xlfhGyHBoeDM/9L9IG4bBbn8J482QkHnlRqQp1+cRqVBe 0TWdbEKVFtwcu4omvrL2XOAEF0K2ltaA6Blzav8d00jYt0qsbPzCjfKtlBhjuymUFYjE 1Y3w== X-Gm-Message-State: AOAM531wQoVrkRaR23Rnew1StwR1pm/09bczFWcRdr6Ky68R/IzV4uGH b1Md5OWByhqJFP3ULhLXOoQg2YCS6cyAyBhNfbIqQQHsIx6iqkjz3rmDcyQIWgyC5C7+NXChSbZ PYlk1viJcmq6LZA8D3eTVXJkLp2iY X-Received: by 2002:a5d:588e:: with SMTP id n14mr4244921wrf.45.1644334814511; 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 To: Geert Uytterhoeven References: <20220204134347.1187749-1-javierm@redhat.com> From: Javier Martinez Canillas In-Reply-To: Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=javierm@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 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: , Cc: "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , Linux Fbdev development list , =?UTF-8?Q?Noralf_Tr=c3=b8nnes?= , Sam Ravnborg , Linux PWM List , David Airlie , Daniel Vetter , Linux Kernel Mailing List , DRI Development , Liam Girdwood , Rob Herring , Mark Brown , Thierry Reding , Maxime Ripard , Thomas Zimmermann , =?UTF-8?Q?Uwe_Kleine-K=c3=b6nig?= , Andy Shevchenko , Lee Jones Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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