From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jani Nikula Subject: Re: [PATCH] drm/i915: use udelay for very small delays Date: Thu, 15 Dec 2016 10:47:57 +0200 Message-ID: <8737hpr32a.fsf@intel.com> References: <1481774609-20998-1-git-send-email-hofrat@osadl.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1481774609-20998-1-git-send-email-hofrat@osadl.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Daniel Vetter Cc: David Airlie , intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Nicholas Mc Guire List-Id: intel-gfx@lists.freedesktop.org T24gVGh1LCAxNSBEZWMgMjAxNiwgTmljaG9sYXMgTWMgR3VpcmUgPGhvZnJhdEBvc2FkbC5vcmc+ IHdyb3RlOgo+IHVzbGVlcF9yYW5nZSgpIGlzIGludGVuZGVkIGZvciBkZWxheXMgaW4gdGhlIDEw dXMgdG8gMTBtcyByYW5nZSB0aGF0IG5lZWQKPiBnb29kIHByZWNpc2lvbi4gYSB1c2VsZWVwX3Jh bmdlKDEsIHdpbGwgZWZmZWN0aXZlbHkgYmUgbm8gbW9yZSB0aGFuIGFuCj4gaW1wcmVjaXNlIHVk ZWxheSB3aXRoIHNvbWUgYWRkZWQgY2FjaGUgZGlzcnVwdGlvbiBhcyBpdCB3aWxsIGZpcmUgbW9y ZSBvcgo+IGxlc3MgaW1tZWRpYXRlbHkgLSB1c2UgdWRlbGF5KCkgaGVyZS4KPgo+IEZpeGVzOiBj b21taXQgYmU0ZmMwNDZiZWQzICgiZHJtL2k5MTU6IGFkZCBWTFYgRFNJIFBMTCBDYWxjdWxhdGlv bnMiKQo+IFNpZ25lZC1vZmYtYnk6IE5pY2hvbGFzIE1jIEd1aXJlIDxob2ZyYXRAb3NhZGwub3Jn Pgo+IC0tLQo+Cj4gUHJvYmxlbSBsb2NhdGVkIGJ5IGNvY2NpbmVsbGUKPgo+IFRoZSByZXF1aXJl bWVudCBvZiB3YWl0aW5nIGF0IGxlYXN0IDAuNSB1cyBpcyBhc3N1cmVkIHdpdGggdGhlIHVkZWxh eSgxKQo+IGhlcmUgd2hpY2ggc2hvdWxkIGJlIG1vcmUgZWZmZWN0aXZlIHRoYW4gYSB1c2xlZXBf cmFuZ2UoKSAtIHdvdWxkIAo+IG5kZWxheSg1MDApIG1ha2Ugc2Vuc2UgaGVyZSA/CgpUaGlzIGlz IGluIHRoZSBtb2Rlc2V0IHBhdGgsIGkuZS4gcHJldHR5IHNsb3cgYW55d2F5LiBJbiB0aGlzIGNh c2UsIHRoZQpwb2ludCBpcyBub3QgdG8gdHJ5IGhhcmQgdG8gbWluaW1pemUgdGhlIHdhaXQsIHRo ZSBwb2ludCBpcyB0byBndWFyYW50ZWUKImF0IGxlYXN0IDAuNSB1cyIgaGFzIHBhc3NlZC4gSWYg dGhlIENQVSBjYW4gZG8gc29tZXRoaW5nIGVsc2UsCmluY2x1ZGluZyBkb3ppbmcgb2ZmLCBpbiB0 aGUgbWVhbiB0aW1lLCBncmVhdC4gSSB0aGluayB3ZSBzaG91bGQgc3RpY2sKd2l0aCB1c2xlZXBf cmFuZ2UoKS4KCkkgdGhpbmsgdGhlIHF1ZXN0aW9uIGlzLCBob3cgZG8gd2UgZXhwcmVzcyB0aGlz IGluIGNvZGU/IElNTyB1ZGVsYXkoKSBpcwpub3QgdGhlIGFuc3dlci4KCkFuZCB3aHkgZG9lc24n dCB1c2xlZXBfcmFuZ2UoKSBrZXJuZWwtZG9jIG1lbnRpb24gYW55dGhpbmcgYWJvdXQgdGhlCnJh bmdlcz8KCgpCUiwKSmFuaS4KCgo+Cj4gUGF0Y2ggd2FzIGNvbXBpbGUgdGVzdGVkIHdpdGg6IHg4 Nl82NF9kZWZjb25maWcgKGltcGxpZXMgQ09ORklHX0RSTV9JOTE1KQo+Cj4gUGF0Y2ggaXMgYWdh aW5zdCA0LjkuMCAobG9jYWx2cnNpb24tbmV4dCBpcyBuZXh0LTIwMTYxMjE0KQo+Cj4gIGRyaXZl cnMvZ3B1L2RybS9pOTE1L2ludGVsX2RzaV9wbGwuYyB8IDIgKy0KPiAgMSBmaWxlIGNoYW5nZWQs IDEgaW5zZXJ0aW9uKCspLCAxIGRlbGV0aW9uKC0pCj4KPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9n cHUvZHJtL2k5MTUvaW50ZWxfZHNpX3BsbC5jIGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxf ZHNpX3BsbC5jCj4gaW5kZXggNTZlZmY2MC4uMGVjMDQwZSAxMDA2NDQKPiAtLS0gYS9kcml2ZXJz L2dwdS9kcm0vaTkxNS9pbnRlbF9kc2lfcGxsLmMKPiArKysgYi9kcml2ZXJzL2dwdS9kcm0vaTkx NS9pbnRlbF9kc2lfcGxsLmMKPiBAQCAtMTU3LDcgKzE1Nyw3IEBAIHN0YXRpYyB2b2lkIHZsdl9l bmFibGVfZHNpX3BsbChzdHJ1Y3QgaW50ZWxfZW5jb2RlciAqZW5jb2RlciwKPiAgCQkgICAgICBj b25maWctPmRzaV9wbGwuY3RybCAmIH5EU0lfUExMX1ZDT19FTik7Cj4gIAo+ICAJLyogd2FpdCBh dCBsZWFzdCAwLjUgdXMgYWZ0ZXIgdW5nYXRpbmcgYmVmb3JlIGVuYWJsaW5nIFZDTyAqLwo+IC0J dXNsZWVwX3JhbmdlKDEsIDEwKTsKPiArCXVkZWxheSgxKTsKPiAgCj4gIAl2bHZfY2NrX3dyaXRl KGRldl9wcml2LCBDQ0tfUkVHX0RTSV9QTExfQ09OVFJPTCwgY29uZmlnLT5kc2lfcGxsLmN0cmwp OwoKLS0gCkphbmkgTmlrdWxhLCBJbnRlbCBPcGVuIFNvdXJjZSBUZWNobm9sb2d5IENlbnRlcgpf X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpJbnRlbC1nZngg bWFpbGluZyBsaXN0CkludGVsLWdmeEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0 cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngK