Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753994Ab2JUOnM (ORCPT ); Sun, 21 Oct 2012 10:43:12 -0400 Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120]:7442 "EHLO cdptpa-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753667Ab2JUOnK convert rfc822-to-8bit (ORCPT ); Sun, 21 Oct 2012 10:43:10 -0400 X-Authority-Analysis: v=2.0 cv=GZOVbHrL c=1 sm=0 a=YPDeGStqRoQnMAluW+pq4Q==:17 a=65KWcu232dMA:10 a=0N38pj-gRz4A:10 a=05ChyHeVI94A:10 a=IkcTkHD0fZMA:10 a=ayC55rCoAAAA:8 a=tCn2Fh6cjnEA:10 a=knlGOIr7Csoc-LFcfiIA:9 a=QEXdDO2ut3YA:10 a=2xqgG0JYw_UWkOhK:21 a=xwDa3HCh1wnhg57D:21 a=YPDeGStqRoQnMAluW+pq4Q==:117 X-Cloudmark-Score: 0 X-Originating-IP: 50.89.247.146 Message-ID: <508409FC.6080805@cfl.rr.com> Date: Sun, 21 Oct 2012 10:43:08 -0400 From: Mark Hounschell Reply-To: dmarkh@cfl.rr.com User-Agent: Mozilla/5.0 (X11; Linux i686; rv:16.0) Gecko/20121010 Thunderbird/16.0.1 MIME-Version: 1.0 To: linux-kernel@vger.kernel.org CC: Intel Graphics Development , "markh@compro.net >> Mark Hounschell" Subject: drm_kms_helper problems Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4175 Lines: 99 I have a TV that appears to not provide proper EDID info to the HDMI or DVI ports of my Intel DH77DF motherboard. I received some pointers from this list that pointed me in the direction of creating my own EDID file and I now have a binary blob that matches what the service manual says is the proper EDID info. But I am unable to get the drm_kms_helper module to load and use this file. My relevant kernel config options are. CONFIG_DRM_KMS_HELPER=m CONFIG_DRM_LOAD_EDID_FIRMWARE=y my relevant kernel command line contains: video=card0-HDMI-A-1:e drm_kms_helper.edid_firmware=card0-HDMI-A-1:edid/lg42lb9df_hdmi1.edid The edid file: # ls -al /lib/firmware/edid/lg42lb9df_hdmi1.edid -rw-r--r-- 1 root root 256 Oct 16 05:46 /lib/firmware/edid/lg42lb9df_hdmi1.edid connector info from /sys/class/drm/ card0 card0-DP-1 card0-DP-2 card0-DP-3 card0-HDMI-A-1 card0-HDMI-A-2 card0-HDMI-A-3 card0-VGA-1 controlD64 version And I don't really understand why I have 3 entries for the one hdmi port? Nor do I really understand _exactly_ how to define the connector in my kernel command line or which of the 3 connectors from /sys I should be using. I've tried different variants. Ie. card0-HDMI-A-1and HDMI-A-1. The results in the kernel log file remain: [ 1.879654] drm_kms_helper: Unknown parameter `edid' I assume I am doing something wrong but I have put some debug printks in kernel/params.c that shows me every call made to it and it's params. It is entered many times and I see a sequence to in the log file. As an example, the last one to call with params before drm_kms_helper is "late" and here are my debug prints for it: [ 0.840206] parse_args: Entered for late [ 0.840207] parse_args: doing = late [ 0.840208] parse_args: args = root=/dev/disk/by-id/ata-INTEL_SSDSC2CW060A3_CVCV205106EB060AGN-part4 video=1024x768 resume=/dev/disk/by-id/ata-INTEL_SSDSC2CW060A3_CVCV205106EB060AGN-part3 splash=silent quiet vga=0x37e irqpoll video=card0-HDMI-A-1:e drm_kms_helper.edid_firmware=card0-HDMI-A-1:edid/lg42lb9df_hdmi1.edid [ 0.840209] parse_args: params = [ 0.840210] parse_args: num = 174 [ 0.840210] parse_args: min_level = 7 [ 0.840211] parse_args: max_level = 7 Now when it gets to drm_kms_helper this is what I get and this is certainly screwed up, I just don't know why. [ 1.879648] parse_args: Entered for drm_kms_helper [ 1.879648] parse_args: doing = drm_kms_helper [ 1.879649] parse_args: args = edid \xffffff86\xffffffe2\xfffffff8h\xffffff89\xffffff86\xffffffc0\xffffff80\xffffffff\xffffffffԒ\xffffffe2\xfffffff8T\xffffff86\xffffffe2\xfffffff88\xffffff89\xffffff86\xffffffc0\xffffffa4\xffffffff\xffffffffd\xffffff86\xffffffe2\xfffffff8 [ 1.879650] parse_args: num = 2 [ 1.879651] parse_args: min_level = -32768 [ 1.879651] parse_args: max_level = 32767 [ 1.879653] \xffffff86\xffffffe2\xfffffff8h\xffffff89\xffffff86\xffffffc0\xffffff80\xffffffff\xffffffffԒ\xffffffe2\xfffffff8T\xffffff86\xffffffe2\xfffffff88\xffffff89\xffffff86\xffffffc0\xffffffa4\xffffffff\xffffffffd\xffffff86\xffffffe2\xfffffff8, num=2, min_level=-32768, max_level=32767 Then finally: [ 1.879654] drm_kms_helper: Unknown parameter `edid' The additional printks I inserted into kernel/params.c: if (*args) pr_debug("doing %s, parsing ARGS: '%s'\n", doing, args); + if (*args) { + printk("\nparse_args: Entered for %s\n", doing); + printk("parse_args: doing = %s\n", doing); + printk("parse_args: args = %s\n", args); + printk("parse_args: params = %s\n", params); + printk("parse_args: num = %d\n", num); + printk("parse_args: min_level = %d\n",min_level); + printk("parse_args: max_level = %d\n", max_level); + } while (*args) { This is using a vanilla 3.6.2 kernel. Any help would be appreciated. Regards Mark -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/