From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= Subject: Re: KMS question Date: Thu, 13 Apr 2017 19:20:31 +0300 Message-ID: <20170413162031.GW30290@intel.com> References: <2a39d6ca-afdd-bccf-264f-132736313d2b@pr.hu> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id BF9D26E8CF for ; Thu, 13 Apr 2017 16:20:56 +0000 (UTC) Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Ilia Mirkin Cc: lkml , Maling list - DRI developers List-Id: dri-devel@lists.freedesktop.org T24gVGh1LCBBcHIgMTMsIDIwMTcgYXQgMTE6Mzc6NDVBTSAtMDQwMCwgSWxpYSBNaXJraW4gd3Jv dGU6Cj4gT24gVGh1LCBBcHIgMTMsIDIwMTcgYXQgMTE6MzYgQU0sIEFsZXggRGV1Y2hlciA8YWxl eGRldWNoZXJAZ21haWwuY29tPiB3cm90ZToKPiA+IE9uIFRodSwgQXByIDEzLCAyMDE3IGF0IDEx OjAzIEFNLCBCb3N6b3JtZW55aSBab2x0YW4gPHpib3N6b3JAcHIuaHU+IHdyb3RlOgo+ID4+IDIw MTctMDQtMTMgMTY6MDUga2VsdGV6w6lzc2VsLCBBbGV4IERldWNoZXIgw61ydGE6Cj4gPj4+Cj4g Pj4+IE9uIFRodSwgQXByIDEzLCAyMDE3IGF0IDk6MDMgQU0sIEJvc3pvcm1lbnlpIFpvbHRhbiA8 emJvc3pvckBwci5odT4gd3JvdGU6Cj4gPj4+Pgo+ID4+Pj4gSGksCj4gPj4+Pgo+ID4+Pj4gaG93 IGNhbiBJIGRpc2FibGUgdGhlIGJlaGF2aW91ciBpbiB0aGUgS01TIGRyaXZlcnMKPiA+Pj4+IHRo YXQgZW5hYmxlcyBhbGwgb3V0cHV0cyBhdCBvbmNlPwo+ID4+Pj4KPiA+Pj4+IEl0IGlzIHZlcnkg YW5ub3lpbmcgdGhhdCBvbiBhIFBPUyBtYWNoaW5lIHdpdGggYW4KPiA+Pj4+IDEwMjR4NzY4IExW RFMgYW5kIGEgODAweDQ4MCBzZWNvbmRhcnkgbW9uaXRvciAoYm90aCBidWlsdC1pbikKPiA+Pj4+ IHRoZSBLTVMgZHJpdmVyIHdha2VzIHVwIGJvdGguIFRoZW4gdGhlIGZyYW1lYnVmZmVyIGNvbnNv bGUKPiA+Pj4+IGFuZCBwbHltb3V0aCB1c2UgYm90aCBzY3JlZW5zLCBtYWtpbmcgdGhlIHByaW1h cnkgb3V0cHV0Cj4gPj4+PiB2ZXJ5IG9kZCB3aXRoIG9ubHkgdGhlIHRvcC1sZWZ0IHBhcnQgdXNl ZCBieSB0aGUgYm9vdCBzcGxhc2guCj4gPj4+Pgo+ID4+Pj4gSSB3b3VsZCBsaWtlIHRoZSBib290 IHNwbGFzaCB0byBiZSBzaG93biBvbmx5IG9uIHRoZSBwcmltYXJ5Cj4gPj4+PiBvdXRwdXQgYXQg aXRzIGZ1bGwgcmVzb2x1dGlvbiBpbnN0ZWFkIG9mIG9uIGFsbCBvdXRwdXRzIHVzaW5nCj4gPj4+ PiB0aGUgc21hbGxlc3QgY29tbW9uIHJlY3RhbmdsZS4KPiA+Pj4+Cj4gPj4+PiBJcyB0aGVyZSBh IGtlcm5lbCBjb21tYW5kIGxpbmUgY29uZmlndXJhdGlvbiB0aGF0IGFjaGlldmVzIHRoaXM/Cj4g Pj4+Pgo+ID4+Pj4gVGhlIGRldmljZSBpbiBxdWVzdGlvbiB1c2VzIHRoZSBnbWE1MDAga2VybmVs IGRyaXZlciBidXQgdGhlIHNhbWUKPiA+Pj4+IGJlaGF2aW91ciBpcyBvYnNlcnZlZCB3aXRoIHRo ZSBpOTE1IGFuZCByYWRlb24gZHJpdmVycy4KPiA+Pj4+Cj4gPj4+Cj4gPj4+IFRoZSBwcm9ibGVt IGlzIGZiZGV2IGlzIG5vdCBtdWx0aS1oZWFkIGF3YXJlLiAgVGhlIGZiZGV2IGVtdWxhdGlvbiBp bgo+ID4+PiB0aGUgS01TIGRyaXZlcnMgYXR0ZW1wdHMgdG8gbGlnaHQgdXAgYWxsIG1vbml0b3Jz IHNvIHRoYXQgc29tZXRoaW5nCj4gPj4+IHNob3dzIHVwIG9uIGFsbCBoZWFkcy4gIElmIHlvdSBy ZWFsbHkgd2FudCBkaWZmZXJlbnQgcGVyIGhlYWQKPiA+Pj4gY29uZmlndXJhdGlvbnMsIHlvdSBu ZWVkIHRvIHVzZSB0aGUgS01TIEFQSSBkaXJlY3RseS4gIEFzIGEKPiA+Pj4gd29ya2Fyb3VuZCwg eW91IGNhbiB1c2UgdGhlIGtlcm5lbCBjb21tYW5kIGxpbmUgdG8gZGlzYWJsZSB0aGUgb3V0cHV0 Cj4gPj4+IHlvdSBkb24ndCB3YW50IHRvIGJlIGxpdCB1cC4gIFNlZToKPiA+Pj4gaHR0cHM6Ly93 aWtpLmFyY2hsaW51eC5vcmcvaW5kZXgucGhwL2tlcm5lbF9tb2RlX3NldHRpbmcKPiA+Pj4gZm9y IG1vcmUgaW5mby4gIGJhc2ljYWxseSBhZGQgdmlkZW89VFYtMTpkIHRvIGRpc2FibGUgdGhlIG91 dHB1dCBpbgo+ID4+PiBxdWVzdGlvbi4gIFJlcGxhY2UgVFYtMSB3aXRoIHdoYXRldmVyIGNvbm5l Y3RvciB5b3Ugd2FudCB0byBkaXNhYmxlLgo+ID4+Cj4gPj4KPiA+PiBJIHRyaWVkIGFkZGluZyB2 aWRlbz1EVkktRC0xOmQgdG8gdGhlIGtlcm5lbCBjb21tYW5kIGxpbmUuCj4gPj4KPiA+PiBUaGUg ZWZmZWN0IGlzIHdoaWxlIHRoZSBzZWNvbmQgb3V0cHV0IGlzIGluZGVlZCBkaXNhYmxlZCwgdGhl Cj4gPj4gZnJhbWVidWZmZXIgY29uc29sZSBzdGlsbCB0YWtlcyB0aGUgc2Vjb25kIG91dHB1dCdz IHJlc29sdXRpb24KPiA+PiBpbnRvIGFjY291bnQgYW5kIHRoZSBib290IHNwbGFzaCBpcyBzdGls bCB1c2luZyBvbmx5IHRoZSB0b3AtbGVmdAo+ID4+IDgwMHg0ODAgcGFydCBvZiB0aGUgMTAyNHg3 NjggcHJpbWFyeSBzY3JlZW4uCj4gPj4KPiA+PiBBbHNvLCB0aGUgc2Vjb25kYXJ5IHNjcmVlbiBn b3QgZGlzYWJsZWQgYWxzbyBpbiBYIHdoaWNoIGlzIG5vdCBkZXNpcmVkLgo+ID4+IENhbiBJIHdh a2UgaXQgdXAgdW5kZXIgWCBzb21laG93PyBUaGlzIGRldmljZSBpcyB1c2luZyB0aGUgbW9kZXNl dHRpbmcKPiA+PiBERFggZHJpdmVyLgo+ID4KPiA+IENhbiB5b3UgZW5hYmxlIGl0IHZpYSByYW5k cj8KPiAKPiBJIHRoaW5rIHRoZSB2aWRlbz0gYmFzZWQgZGlzYWJsZSBmb3JjZXMgdGhlIGNvbm5l Y3RvciB0byBiZSBkaXNhYmxlZAo+IGlycmV2b2NhYmx5LgoKIyBlY2hvIGRldGVjdCA+IC9zeXMv Y2xhc3MvZHJtLzx3aGF0ZXZlcj4vc3RhdHVzCgotLSAKVmlsbGUgU3lyasOkbMOkCkludGVsIE9U QwpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpkcmktZGV2 ZWwgbWFpbGluZyBsaXN0CmRyaS1kZXZlbEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9s aXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9kcmktZGV2ZWwK From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753011AbdDMQU7 (ORCPT ); Thu, 13 Apr 2017 12:20:59 -0400 Received: from mga06.intel.com ([134.134.136.31]:5092 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751654AbdDMQU5 (ORCPT ); Thu, 13 Apr 2017 12:20:57 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.37,195,1488873600"; d="scan'208";a="73700374" Date: Thu, 13 Apr 2017 19:20:31 +0300 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= To: Ilia Mirkin Cc: Alex Deucher , lkml , Maling list - DRI developers Subject: Re: KMS question Message-ID: <20170413162031.GW30290@intel.com> References: <2a39d6ca-afdd-bccf-264f-132736313d2b@pr.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Apr 13, 2017 at 11:37:45AM -0400, Ilia Mirkin wrote: > On Thu, Apr 13, 2017 at 11:36 AM, Alex Deucher wrote: > > On Thu, Apr 13, 2017 at 11:03 AM, Boszormenyi Zoltan wrote: > >> 2017-04-13 16:05 keltezéssel, Alex Deucher írta: > >>> > >>> On Thu, Apr 13, 2017 at 9:03 AM, Boszormenyi Zoltan wrote: > >>>> > >>>> Hi, > >>>> > >>>> how can I disable the behaviour in the KMS drivers > >>>> that enables all outputs at once? > >>>> > >>>> It is very annoying that on a POS machine with an > >>>> 1024x768 LVDS and a 800x480 secondary monitor (both built-in) > >>>> the KMS driver wakes up both. Then the framebuffer console > >>>> and plymouth use both screens, making the primary output > >>>> very odd with only the top-left part used by the boot splash. > >>>> > >>>> I would like the boot splash to be shown only on the primary > >>>> output at its full resolution instead of on all outputs using > >>>> the smallest common rectangle. > >>>> > >>>> Is there a kernel command line configuration that achieves this? > >>>> > >>>> The device in question uses the gma500 kernel driver but the same > >>>> behaviour is observed with the i915 and radeon drivers. > >>>> > >>> > >>> The problem is fbdev is not multi-head aware. The fbdev emulation in > >>> the KMS drivers attempts to light up all monitors so that something > >>> shows up on all heads. If you really want different per head > >>> configurations, you need to use the KMS API directly. As a > >>> workaround, you can use the kernel command line to disable the output > >>> you don't want to be lit up. See: > >>> https://wiki.archlinux.org/index.php/kernel_mode_setting > >>> for more info. basically add video=TV-1:d to disable the output in > >>> question. Replace TV-1 with whatever connector you want to disable. > >> > >> > >> I tried adding video=DVI-D-1:d to the kernel command line. > >> > >> The effect is while the second output is indeed disabled, the > >> framebuffer console still takes the second output's resolution > >> into account and the boot splash is still using only the top-left > >> 800x480 part of the 1024x768 primary screen. > >> > >> Also, the secondary screen got disabled also in X which is not desired. > >> Can I wake it up under X somehow? This device is using the modesetting > >> DDX driver. > > > > Can you enable it via randr? > > I think the video= based disable forces the connector to be disabled > irrevocably. # echo detect > /sys/class/drm//status -- Ville Syrjälä Intel OTC