From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753428AbdDJORa convert rfc822-to-8bit (ORCPT ); Mon, 10 Apr 2017 10:17:30 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36894 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752963AbdDJOR3 (ORCPT ); Mon, 10 Apr 2017 10:17:29 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 37BD019CBD1 Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=kraxel@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 37BD019CBD1 Message-ID: <1491833847.30990.77.camel@redhat.com> Subject: Re: [RfC PATCH] drm: fourcc byteorder: brings header file comments in line with reality. From: Gerd Hoffmann To: Pekka Paalanen Cc: dri-devel@lists.freedesktop.org, open list , amd-gfx@lists.freedesktop.org, Daniel Vetter Date: Mon, 10 Apr 2017 16:17:27 +0200 In-Reply-To: <20170410161214.305f5daf@eldfell> References: <20170410101202.19229-1-kraxel@redhat.com> <20170410161214.305f5daf@eldfell> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Mime-Version: 1.0 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Mon, 10 Apr 2017 14:17:29 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, > which software have you used as representative of "reality"? ppc64 (big endian) virtual machine, running with qemu stdvga & bochs-drm driver. Xorg with modesetting driver uses DRM_FORMAT_XRGB8888 (one and only format supported by bochs-drm), and we have to interpret that in bigendian byte order on the host side to get a correct display. Didn't try wayland. Can do, but will take a while. Don't have a wayland-capable guest install at hand, and installing one takes a while because I don't have a physical pseries and emulation is slooooww. > To solve that problem, we would like to know if anything existing would > break for each possible solution, but no developers using BE have really > turned up. That is part of the problem. And even ppc is moving to little endian these days ... cheers, Gerd From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerd Hoffmann Subject: Re: [RfC PATCH] drm: fourcc byteorder: brings header file comments in line with reality. Date: Mon, 10 Apr 2017 16:17:27 +0200 Message-ID: <1491833847.30990.77.camel@redhat.com> References: <20170410101202.19229-1-kraxel@redhat.com> <20170410161214.305f5daf@eldfell> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <20170410161214.305f5daf@eldfell> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Sender: "amd-gfx" To: Pekka Paalanen Cc: Daniel Vetter , amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, open list , dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org List-Id: dri-devel@lists.freedesktop.org ICBIaSwKCj4gd2hpY2ggc29mdHdhcmUgaGF2ZSB5b3UgdXNlZCBhcyByZXByZXNlbnRhdGl2ZSBv ZiAicmVhbGl0eSI/CgpwcGM2NCAoYmlnIGVuZGlhbikgdmlydHVhbCBtYWNoaW5lLCBydW5uaW5n IHdpdGggcWVtdSBzdGR2Z2EgJiBib2Nocy1kcm0KZHJpdmVyLiAgWG9yZyB3aXRoIG1vZGVzZXR0 aW5nIGRyaXZlciB1c2VzIERSTV9GT1JNQVRfWFJHQjg4ODggKG9uZSBhbmQKb25seSBmb3JtYXQg c3VwcG9ydGVkIGJ5IGJvY2hzLWRybSksIGFuZCB3ZSBoYXZlIHRvIGludGVycHJldCB0aGF0IGlu CmJpZ2VuZGlhbiBieXRlIG9yZGVyIG9uIHRoZSBob3N0IHNpZGUgdG8gZ2V0IGEgY29ycmVjdCBk aXNwbGF5LgoKRGlkbid0IHRyeSB3YXlsYW5kLiAgQ2FuIGRvLCBidXQgd2lsbCB0YWtlIGEgd2hp bGUuICBEb24ndCBoYXZlIGEKd2F5bGFuZC1jYXBhYmxlIGd1ZXN0IGluc3RhbGwgYXQgaGFuZCwg YW5kIGluc3RhbGxpbmcgb25lIHRha2VzIGEgd2hpbGUKYmVjYXVzZSBJIGRvbid0IGhhdmUgYSBw aHlzaWNhbCBwc2VyaWVzIGFuZCBlbXVsYXRpb24gaXMgc2xvb29vd3cuCgo+IFRvIHNvbHZlIHRo YXQgcHJvYmxlbSwgd2Ugd291bGQgbGlrZSB0byBrbm93IGlmIGFueXRoaW5nIGV4aXN0aW5nIHdv dWxkCj4gYnJlYWsgZm9yIGVhY2ggcG9zc2libGUgc29sdXRpb24sIGJ1dCBubyBkZXZlbG9wZXJz IHVzaW5nIEJFIGhhdmUgcmVhbGx5Cj4gdHVybmVkIHVwLgoKVGhhdCBpcyBwYXJ0IG9mIHRoZSBw cm9ibGVtLgpBbmQgZXZlbiBwcGMgaXMgbW92aW5nIHRvIGxpdHRsZSBlbmRpYW4gdGhlc2UgZGF5 cyAuLi4KCmNoZWVycywKICBHZXJkCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fXwphbWQtZ2Z4IG1haWxpbmcgbGlzdAphbWQtZ2Z4QGxpc3RzLmZyZWVkZXNr dG9wLm9yZwpodHRwczovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2Ft ZC1nZngK