From patchwork Tue Mar 12 14:23:56 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexey Gladkov X-Patchwork-Id: 780171 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0F03678286; Tue, 12 Mar 2024 14:24:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710253452; cv=none; b=DcuJkG6SgXYI13YRmN4YKja8o1tHpKeplgp7WIkWLuw1vROADVYL9XeukdLlVvG0mgY6LAYvAFsUoYNJu/nhGQSLKtIxufI/vvW1Pr21dKwE8Z+Q9Esotj7ThFcNq3C4awQJcsy8+vWQp6yiCN8Wk8CCbheC8R2YorB+trDKBvk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710253452; c=relaxed/simple; bh=qpr3oDr5denGURn+3TLpW0eVsEAWpGD6RfS4albEsBY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ooAEr5gvcUhLnodgSc08Q9aN1pR+vXrLb4fTCq63iAJQw+tx4cjantRwgOp0cbHKcfiJFsF80XzVpTMvzk9V7oY4kNaybeTGfM+xZDgZm4fYWZjivKPe7/SbIp/sNo27mQR9RkS5cemMKkTHJ2i/iyjKU5pXNojLRthnj3RPM0I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gG4TwGYy; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="gG4TwGYy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B519EC433F1; Tue, 12 Mar 2024 14:24:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710253451; bh=qpr3oDr5denGURn+3TLpW0eVsEAWpGD6RfS4albEsBY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gG4TwGYyOAJNWY3JrsgJRCsHgbB4CJ7VnI46zq3sEoMoeXjtYfna6hEM67zCPXI4Z UZeaOaU2zyGISvFxdri98/FssO/Vu4v52BaYLlLf6oKttIeolEUDvNFxinvvkN1dAu Nqm3wgKMvEIiMVp1YIWaZk5k+kPFYOn2k7tG2EwCXSAXoPtC9EQD0onVSfKJNk/O4j gocIj5rJzoE0z/xXMA7PAYnfkpnY1JiNBAoirLlrjERtizhn93REUYYpcmf8mrvbfg tsVhkEkz/Ff05dQoKH4nokHVQabLDcyNdYaUUqtreFWAa/Naykn7e+zEgVvVtpX0+U uq2l1H0Z3ihUg== From: legion@kernel.org To: Greg Kroah-Hartman , Jiri Slaby Cc: Alexey Gladkov , LKML , kbd@lists.linux.dev, linux-api@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-serial@vger.kernel.org Subject: [PATCH v3 0/2] VT: Add ability to get font requirements Date: Tue, 12 Mar 2024 15:23:56 +0100 Message-ID: X-Mailer: git-send-email 2.44.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Alexey Gladkov We now have KD_FONT_OP_SET_TALL, but in fact such large fonts cannot be loaded. No console driver supports tall fonts. Unfortunately, userspace cannot distinguish the lack of support in the driver from errors in the font itself. In all cases, EINVAL will be returned. This patchset adds a separate ioctl to obtain the font parameters supported by the console driver. v3: * Added the use of the in_range macro. * Squashed the commits that add ioctl to console divers. v2: * Instead of the KDFONTOP extension, a new ioctl has been added to obtain font information. --- Alexey Gladkov (2): VT: Add KDFONTINFO ioctl VT: Allow to get max font width and height drivers/tty/vt/vt.c | 24 ++++++++++++++++++++++++ drivers/tty/vt/vt_ioctl.c | 13 +++++++++++++ drivers/video/console/newport_con.c | 21 +++++++++++++++++---- drivers/video/console/sticon.c | 25 +++++++++++++++++++++++-- drivers/video/console/vgacon.c | 21 ++++++++++++++++++++- drivers/video/fbdev/core/fbcon.c | 22 +++++++++++++++++++++- include/linux/console.h | 2 ++ include/linux/vt_kern.h | 1 + include/uapi/linux/kd.h | 13 ++++++++++++- 9 files changed, 133 insertions(+), 9 deletions(-)