From owner-freebsd-hackers@freebsd.org Sun Aug 25 19:28:12 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 9D884E77E8 for ; Sun, 25 Aug 2019 19:28:12 +0000 (UTC) (envelope-from vijaykumar9597@gmail.com) Received: from mail-qt1-x82f.google.com (mail-qt1-x82f.google.com [IPv6:2607:f8b0:4864:20::82f]) (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 46GlXq5nxxz4LYt for ; Sun, 25 Aug 2019 19:28:11 +0000 (UTC) (envelope-from vijaykumar9597@gmail.com) Received: by mail-qt1-x82f.google.com with SMTP id y26so16032952qto.4 for ; Sun, 25 Aug 2019 12:28:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=PRjkR7OWmP08G0+NJjEg6d0s30VdPxi9O8eAjybPIwA=; b=RopaGo7kC02tP8yjJJHaM8w45Sy0P++QAmQ608kNCzdkPZ0gkgHp5p5fGeUg/CTBXO QmywzN7RY0XIIjE5Wq+vw3WMao1rhykYJU2LGGl/S5rUoCGiHU/Oy7CcHUhJb3TnVcXm QRVaHVADVz6wQO5PvkOEMLh/pBrLxzzOnda6P2F4WTqGRoZESJ16xwqArwBqnFmbd9Gp 1e1GT1O+51Vm27iA1cU0N1F0Zu/yU/fmszjKdED/HsjqzR/KST13FK9ZnDafFmOX5N6o 116OQ+q0sGE4nqX5SieNyNwAM8fE7zVPqTYDQ/jwn+2FRRBifspsCtMGWoWOvwTgnj0q GB3g== 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=PRjkR7OWmP08G0+NJjEg6d0s30VdPxi9O8eAjybPIwA=; b=DXK5FUBZ+Y+FND1melqHqDTsmh57xeC7bCayn6FX3lSf1wUIt1o5rAcfqLNXVRBufL ibHtJCsttWkvvXpbkp9POJ8WCq7EPFpEGSs2/Jp7zp/R+gP+YnVSOq3143kw2h8r7WTu aypWZC+p2GXdJ8cte10uPwzgajsHZtKCXCe7r6BVUY2Qf8npNE6LHlwMjQxx5iJASXtY vvGEWNEv4N/fgGyaGXHAbZqIKdVlh9y2A+dECq0L6iILjmReXVya9WoU9hoOBmotbL0h VaBWWQuxlya4uUWkr/lQlHr2AczuQmLMViuxdMO3uFAmtkZGL9mGFKawObivBceW9p/C 0Vig== X-Gm-Message-State: APjAAAWyDWP+5ITsPiiwuw4SbEDOkSFnp3uh988CpGL7qaTXQKMMRzsT fxWGo+PyBbayCqJJIJSUpf9z3Zm/wd3yZs3DnbWIEfwF X-Google-Smtp-Source: APXvYqxJ/o8kPjkQz6xn/tdRMDXgmVJDO2i4/KkQ+D2I7IGfFnssTiBGdeVOzX6aYH5jT8Atwu8U3bvF2UleFzooeN0= X-Received: by 2002:ac8:1419:: with SMTP id k25mr14368838qtj.339.1566761290867; Sun, 25 Aug 2019 12:28:10 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Vijay Kumar Banerjee Date: Mon, 26 Aug 2019 00:57:59 +0530 Message-ID: Subject: Re: Question regarding framebuffer driver. To: Aleksandr Rybalko Cc: freebsd-hackers@freebsd.org X-Rspamd-Queue-Id: 46GlXq5nxxz4LYt X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=RopaGo7k; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of vijaykumar9597@gmail.com designates 2607:f8b0:4864:20::82f as permitted sender) smtp.mailfrom=vijaykumar9597@gmail.com X-Spamd-Result: default: False [-3.00 / 15.00]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; FREEMAIL_FROM(0.00)[gmail.com]; URI_COUNT_ODD(1.00)[3]; DKIM_TRACE(0.00)[gmail.com:+]; RCPT_COUNT_TWO(0.00)[2]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; NEURAL_HAM_SHORT(-1.00)[-0.995,0]; FROM_EQ_ENVFROM(0.00)[]; IP_SCORE(0.00)[ip: (-9.37), ipnet: 2607:f8b0::/32(-2.87), asn: 15169(-2.33), country: US(-0.05)]; MIME_TRACE(0.00)[0:+,1:+,2:~]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; DWL_DNSWL_NONE(0.00)[gmail.com.dwl.dnswl.org : 127.0.5.0]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(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]; IP_SCORE_FREEMAIL(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[f.2.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; 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: Sun, 25 Aug 2019 19:28:12 -0000 On Sat, Aug 24, 2019 at 12:35 AM Aleksandr Rybalko wrote: > 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. > > Hi Aleksandr, Thanks for the reply, I checked the data and it was alright. The screen wasn't even turning on, I figured out that the problem was in pinmuxing. The problem is now solved when I ported the pinmux driver correctly. Thanks and regards, Vijay > =D0=B2=D1=82, 16 =D0=BB=D0=B8=D0=BF. 2019 =D0=BE 15:22 Vijay Kumar Banerj= ee > =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 somethin= g >> 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 t= he >> 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.or= g >> " >> > > > -- > WBW > ------- > Rybalko Aleksandr > >