From patchwork Tue Mar 16 14:38:05 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gerd Hoffmann X-Patchwork-Id: 12142297 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B0C7DC433E6 for ; Tue, 16 Mar 2021 14:40:08 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 676BD65076 for ; Tue, 16 Mar 2021 14:40:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 676BD65076 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:59208 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lMArf-0005Nq-I8 for qemu-devel@archiver.kernel.org; Tue, 16 Mar 2021 10:40:07 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44364) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lMApz-0003eD-8Y for qemu-devel@nongnu.org; Tue, 16 Mar 2021 10:38:23 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:56733) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1lMApx-0002B3-6C for qemu-devel@nongnu.org; Tue, 16 Mar 2021 10:38:23 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1615905500; 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=C+u63sTPzR7LblPkkRfEgX7Zhaq6BoG8nUhQdSKoMXo=; b=IV2B9ZhwF1C/cx80+yodH2PozCG0pBoWHvKgOQxfWCcgAEDKD+yaV6KjH+YxQ2/j5/KIfo d9knVyQmQX4I68bqfwFhJzBKtxPgJBuIJnTX6tsTwWL+f70Ma+ijq6GmWNu2LRxpD2wn7B f3MjymIN1nKFNx/gv50Iv5x4YM0YKt8= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-582-I_XcUJdnMJGot2dHpTqRgw-1; Tue, 16 Mar 2021 10:38:18 -0400 X-MC-Unique: I_XcUJdnMJGot2dHpTqRgw-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 869B6A0C02 for ; Tue, 16 Mar 2021 14:38:17 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-112-141.ams2.redhat.com [10.36.112.141]) by smtp.corp.redhat.com (Postfix) with ESMTPS id CAB18104C517; Tue, 16 Mar 2021 14:38:13 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 4CFFA1800628; Tue, 16 Mar 2021 15:38:12 +0100 (CET) From: Gerd Hoffmann To: qemu-devel@nongnu.org Subject: [PATCH 2/9] edid: edid_desc_next Date: Tue, 16 Mar 2021 15:38:05 +0100 Message-Id: <20210316143812.2363588-3-kraxel@redhat.com> In-Reply-To: <20210316143812.2363588-1-kraxel@redhat.com> References: <20210316143812.2363588-1-kraxel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kraxel@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=kraxel@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.25, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Gerd Hoffmann Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Add helper function to find the next free desc block. Needed when we start to use the dta descriptor entries. Signed-off-by: Gerd Hoffmann --- hw/display/edid-generate.c | 41 ++++++++++++++++++++++++-------------- 1 file changed, 26 insertions(+), 15 deletions(-) diff --git a/hw/display/edid-generate.c b/hw/display/edid-generate.c index 1665b7cbb29a..ef7a70fc9654 100644 --- a/hw/display/edid-generate.c +++ b/hw/display/edid-generate.c @@ -143,6 +143,17 @@ static void edid_checksum(uint8_t *edid) } } +static uint8_t *edid_desc_next(uint8_t *edid, uint8_t *dta, uint8_t *desc) +{ + if (desc == NULL) { + return NULL; + } + if (desc + 18 + 18 < edid + 127) { + return desc + 18; + } + return NULL; +} + static void edid_desc_type(uint8_t *desc, uint8_t type) { desc[0] = 0; @@ -299,7 +310,7 @@ uint32_t qemu_edid_dpi_to_mm(uint32_t dpi, uint32_t res) void qemu_edid_generate(uint8_t *edid, size_t size, qemu_edid_info *info) { - uint32_t desc = 54; + uint8_t *desc = edid + 54; uint8_t *xtra3 = NULL; uint8_t *dta = NULL; uint32_t width_mm, height_mm; @@ -400,32 +411,32 @@ void qemu_edid_generate(uint8_t *edid, size_t size, /* =============== descriptor blocks =============== */ - edid_desc_timing(edid + desc, info->prefx, info->prefy, + edid_desc_timing(desc, info->prefx, info->prefy, width_mm, height_mm); - desc += 18; + desc = edid_desc_next(edid, dta, desc); - edid_desc_ranges(edid + desc); - desc += 18; + edid_desc_ranges(desc); + desc = edid_desc_next(edid, dta, desc); if (info->name) { - edid_desc_text(edid + desc, 0xfc, info->name); - desc += 18; + edid_desc_text(desc, 0xfc, info->name); + desc = edid_desc_next(edid, dta, desc); } if (info->serial) { - edid_desc_text(edid + desc, 0xff, info->serial); - desc += 18; + edid_desc_text(desc, 0xff, info->serial); + desc = edid_desc_next(edid, dta, desc); } - if (desc < 126) { - xtra3 = edid + desc; + if (desc) { + xtra3 = desc; edid_desc_xtra3_std(xtra3); - desc += 18; + desc = edid_desc_next(edid, dta, desc); } - while (desc < 126) { - edid_desc_dummy(edid + desc); - desc += 18; + while (desc) { + edid_desc_dummy(desc); + desc = edid_desc_next(edid, dta, desc); } /* =============== finish up =============== */