From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jani Nikula Subject: Re: [PATCH] drm/i915: use udelay for very short delays Date: Thu, 15 Dec 2016 11:52:34 +0200 Message-ID: <87mvfxpli5.fsf@intel.com> References: <1481776147-23041-1-git-send-email-hofrat@osadl.org> <87wpf1pnj2.fsf@intel.com> <20161215092830.GA25458@osadl.at> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <20161215092830.GA25458@osadl.at> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Nicholas Mc Guire Cc: David Airlie , intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Nicholas Mc Guire , Daniel Vetter List-Id: intel-gfx@lists.freedesktop.org T24gVGh1LCAxNSBEZWMgMjAxNiwgTmljaG9sYXMgTWMgR3VpcmUgPGRlci5oZXJyQGhvZnIuYXQ+ IHdyb3RlOgo+IE9uIFRodSwgRGVjIDE1LCAyMDE2IGF0IDExOjA4OjQ5QU0gKzAyMDAsIEphbmkg TmlrdWxhIHdyb3RlOgo+PiBPbiBUaHUsIDE1IERlYyAyMDE2LCBOaWNob2xhcyBNYyBHdWlyZSA8 aG9mcmF0QG9zYWRsLm9yZz4gd3JvdGU6Cj4+ID4gRXZlbiBvbiBmYXN0IHN5c3RlbXMgYSAyIG1p Y3Jvc2Vjb25kIGRlbGF5IGlzIG1vc3QgbGlrZWx5IG1vcmUgZWZmaWNpZW50Cj4+ID4gYXMgYSBi dXN5LXdhaXQgbG9vcC4gVGhlIG92ZXJoZWFkIG9mIGEgaHJ0aW1lciBkb2VzIG5vdCBzZWVtIHdh cnJhbnRlZCAtCj4+ID4gY2hhbmdlIHRoaXMgdG8gYSB1ZGVsYXkoMikuCj4+IAo+PiBTaW1pbGFy IGNvbmNlcm5zIGFzIGluIFsxXS4gV2UgZG9uJ3QgbmVlZCB0aGUgYWNjdXJhY3kgb2YgdWRlbGF5 KCkgaGVyZSwKPj4gc28gdGhpcyBib2lscyBkb3duIHRvIHdoaWNoIGlzIHRoZSBiZXR0ZXIgdXNl IG9mIENQVS4gV2UgY291bGQgcHJvYmFibHkKPj4gcmVsYXggdGhlIG1heCBkZWxheSBtb3JlIGlm IHRoYXQgd2FzIGhlbHBmdWwuIEJ1dCBJJ20gbm90IGltbWVkaWF0ZWx5Cj4+IHNvbGQgb24gImlz IG1vc3QgbGlrZWx5IG1vcmUgZWZmaWNpZW50IiB3aGljaCBzb3VuZHMgbGlrZSBhIGd1dCBmZWVs aW5nLgo+PiAKPj4gSSdtIHNvcnJ5IGl0J3Mgbm90IGNsZWFyIGluIG15IG90aGVyIHJlcGx5IHRo YXQgSSBkbyBhcHByZWNpYXRlCj4+IGFkZHJlc3NpbmcgaW5jb3JyZWN0L3NpbGx5IHVzZSBvZiB1 c2xlZXBfcmFuZ2UoKTsgSSdtIGp1c3Qgbm90ICh5ZXQpCj4+IGNvbnZpbmNlZCB1ZGVsYXkoKSBp cyB0aGUgYW5zd2VyLgo+Cj4gaWYgdGhlIGRlbGF5IGlzIG5vdCBjcml0aWNhbCBhbmQgYWxsIHRo YXQgaXMgbmVlZGVkIAo+IGlzIGFuIGFzc3VyYW5jZSB0aGF0IGl0IGlzIGdyZWF0ZXIgdGhhbiBY IHVzIHRoZW4gCj4gdXNsZWVwX3JhbmdlIGlzIGZpbmUgd2l0aCBhIHJlbGF4ZWQgbGltaXQuIAo+ IFNvIGZyb20gd2hhdCB5b3Ugd3JvdGUgbXkgcGF0Y2ggcHJvcG9zYWwgaXMgd3JvbmcgLSB0aGUK PiB1ZGVsYXkoKSBpcyBub3QgdGhlIHdheSB0byBnb3QuCj4gTXkgaW50ZW50IGlzIHRvIGdldCBy aWQgb2YgdmVyeSBzbWFsbCB1c2xlZXBfcmFuZ2UoKSBjYXNlcwo+IHNvIGlmIHVzbGVlcF9yYW5n ZSgyMCw1MCkgY2F1c2VzIG5vIGlzc3VlcyB3aXRoIHRoaXMgZHJpdmVyCj4gYW5kIGRvZXMgbm90 IGluZHVjZSBhbnkgcGVyZm9ybWFuY2UgcGVuYWx0eSB0aGVuIHRoYXQgd291bGQgCj4gYmUgdGhl IHdheSB0byBnbyBJIHRoaW5rLgoKT2theSwgc28gSSBsb29rZWQgYXQgdGhlIGNvZGUsIGFuZCBJ IGxvb2tlZCBhdCBvdXIgc3BlYywgYW5kIEkgbG9va2VkIGF0CnRoZSBNSVBJIEQtUEhZIHNwZWMs IGFuZCBJIGNyaWVkIGEgbGl0dGxlLgoKTG9uZyBzdG9yeSBzaG9ydCwgSSB0aGluayB1c2xlZXBf cmFuZ2UoMTAsIDUwKSB3aWxsIGJlIGZpbmUuCgoKQlIsCkphbmkuCgoKLS0gCkphbmkgTmlrdWxh LCBJbnRlbCBPcGVuIFNvdXJjZSBUZWNobm9sb2d5IENlbnRlcgpfX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fXwpJbnRlbC1nZnggbWFpbGluZyBsaXN0CkludGVs LWdmeEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcv bWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngK