From owner-freebsd-hackers@freebsd.org Fri Aug 23 19:05:20 2019 Return-Path: Delivered-To: freebsd-hackers@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 33244CC177 for ; Fri, 23 Aug 2019 19:05:20 +0000 (UTC) (envelope-from ray@ddteam.net) Received: from mail-vs1-xe2d.google.com (mail-vs1-xe2d.google.com [IPv6:2607:f8b0:4864:20::e2d]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 46FW7L2bD9z45Vf for ; Fri, 23 Aug 2019 19:05:18 +0000 (UTC) (envelope-from ray@ddteam.net) Received: by mail-vs1-xe2d.google.com with SMTP id m62so6872709vsc.8 for ; Fri, 23 Aug 2019 12:05:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ddteam-net.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=LsUymhlCrc+ylpcNhJUP+umZpkHtmG1zq53y9yjz/NA=; b=FcduBqfQUxPq/loEPBmgD/4mbBI/KG82HoL4b9viZtydi74P0Bp1jU7RpHJfE1dW3M pJT1i+v9dbF6k7QViU3nVErqqhG7NS9Slyz8RUzSdyvw8ihZx0nG+Z6VqIk4SD2vVafU d1yV5Tx8qk82FZlXSZyIiCRgx+smbo/WFIhZV9d+AiJV5igFX2bpEegnqeLHJLQFXovD mPnowNF46b+olOShYeVTbQ85Y3c8v6hmKBZ5Lq30KT1kdDoO8rQ7jvo0KgVjlxe4By+S kkiDQvIwBIZKnjO4fAG9R7///usYtdQm1UiP5wZGhz0ojfD96OuU4VahXQH/QfTPRxDG IbkQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=LsUymhlCrc+ylpcNhJUP+umZpkHtmG1zq53y9yjz/NA=; b=B57oNrZRyprtjMJ4n/n8VFvOsr9UEiLXkmQD/K+VaoNcNpXBtiJznhw0R2X2kKdaA0 tD19WLPBkHzCy8vlzdxVoGehR50CxO8FE3Hq1Jzh6nEuCUvI7xWZMX0YYeZit1MsiRTe Pa4NAGkUOR08et/JOjV1F4wch0mdcMVZ2EESeOJ6zjNodL9N0a5HHLd55WP2ZTfBGV2q LHIQB/mT1eSoT4+7AA9iIf4YmEuWM6EKe8yO6vgBcQugu0ONl/rZd3TPiGglVp9P2hiR 3ELp8K5jErmyaPAdm+dS2Ih3aaBF9EE6qSw8Svx/2N2i+Oeg79B06zCCJiUd2vkCLjUs fu/A== X-Gm-Message-State: APjAAAUqAq2Zba5gmU3GUeGdaJD/MhYgFqfIkfDwh+cOA71z/0sP+j45 afl/kjacGdYfVno7hN30Efgs96aZdEZtpNQ3a+SGkw== X-Google-Smtp-Source: APXvYqwthCOFl4I4G6CZ/NRhYgSt6SWQKrM01BsYH0u1App0ChYmBn5yrrBbj/+swTSf9HorijnSIrj7bKV/Zmvlwvo= X-Received: by 2002:a05:6102:db:: with SMTP id u27mr3872103vsp.144.1566587116930; Fri, 23 Aug 2019 12:05:16 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Aleksandr Rybalko Date: Fri, 23 Aug 2019 22:05:04 +0300 Message-ID: Subject: Re: Question regarding framebuffer driver. To: Vijay Kumar Banerjee Cc: freebsd-hackers@freebsd.org X-Rspamd-Queue-Id: 46FW7L2bD9z45Vf X-Spamd-Bar: ----- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=ddteam-net.20150623.gappssmtp.com header.s=20150623 header.b=FcduBqfQ; dmarc=none; spf=softfail (mx1.freebsd.org: 2607:f8b0:4864:20::e2d is neither permitted nor denied by domain of ray@ddteam.net) smtp.mailfrom=ray@ddteam.net X-Spamd-Result: default: False [-5.29 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; R_DKIM_ALLOW(-0.20)[ddteam-net.20150623.gappssmtp.com:s=20150623]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; DMARC_NA(0.00)[ddteam.net]; R_SPF_SOFTFAIL(0.00)[~all]; URI_COUNT_ODD(1.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[ddteam-net.20150623.gappssmtp.com:+]; RCPT_COUNT_TWO(0.00)[2]; RCVD_IN_DNSWL_NONE(0.00)[d.2.e.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; NEURAL_HAM_SHORT(-0.99)[-0.992,0]; FREEMAIL_TO(0.00)[gmail.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; IP_SCORE(-2.99)[ip: (-9.70), ipnet: 2607:f8b0::/32(-2.87), asn: 15169(-2.34), country: US(-0.05)]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[] Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.29 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Aug 2019 19:05:20 -0000 Hi Vijay! vt_fb driver is a simple consumer, it just use passed info about location of FrameBuffer in memory and its properties, like width/height/colors/etc. So if display keeps blank, you have to check correctness of passed data. Or maybe even writing driver that prepare graphic subsystem to work with FB. Thanks. =D0=B2=D1=82, 16 =D0=BB=D0=B8=D0=BF. 2019 =D0=BE 15:22 Vijay Kumar Banerjee= =D0=BF=D0=B8=D1=88=D0=B5: > Hello everyone, > > I'm working on porting the framebuffer driver to RTEMS with Beaglebone > Black as the target device. I have have already ported the am335x_lcd, > tda19988, fbd and VT drivers, but the screen doesn't seem to "power up". > From the FreeBSD bootlog (12-RELEASE), I see that the screen is > turning on after the VT initialization message, so I guess it's something > that happens after the vt initialization that turns the screen on. > > So far I have ported the vt_fb and vt_core and it boots up well with the > message : > VT: initialize with new VT driver "fb". > > But the screen doesn't seem to turn on. Can someone please tell me > or point me to the right place in code that is responsible for turning th= e > screen on after VT initialization? > > Thank you, > Vijay > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org= " > --=20 WBW ------- Rybalko Aleksandr