From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frediano Ziglio Subject: [PATCH 6/7] vgabios: Check if mode is currently supported as vesa specifications Date: Tue, 1 May 2012 14:52:45 +0100 Message-ID: <1335880366-9873-7-git-send-email-frediano.ziglio@citrix.com> References: <1335880366-9873-1-git-send-email-frediano.ziglio@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1335880366-9873-1-git-send-email-frediano.ziglio@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Frediano Ziglio , xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org Signed-off-by: Frediano Ziglio --- tools/firmware/vgabios/vbe.c | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/tools/firmware/vgabios/vbe.c b/tools/firmware/vgabios/vbe.c index 0b8b736..a7b06b9 100644 --- a/tools/firmware/vgabios/vbe.c +++ b/tools/firmware/vgabios/vbe.c @@ -930,10 +930,22 @@ Bit16u *AX;Bit16u CX; Bit16u ES;Bit16u DI; if (cur_info != 0) { + Bit16u max_bpp = dispi_get_max_bpp(); + Bit16u size_64k; + Bit16u totalMemory; + + outw(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_VIDEO_MEMORY_64K); + totalMemory = inw(VBE_DISPI_IOPORT_DATA); #ifdef DEBUG printf("VBE found mode %x\n",CX); #endif memcpyb(ss, &info, 0xc000, &(cur_info->info), sizeof(ModeInfoBlockCompact)); + size_64k = size64(info.XResolution, info.YResolution, info.BitsPerPixel); + if ((info.XResolution > dispi_get_max_xres()) || + (info.BitsPerPixel > max_bpp) || + (size_64k > totalMemory)) + info.ModeAttributes &= ~VBE_MODE_ATTRIBUTE_SUPPORTED; + if (using_lfb) { info.NumberOfBanks = 1; } -- 1.7.5.4