From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= Subject: Re: [PATCH] drm/i915: use udelay for very short delays Date: Thu, 15 Dec 2016 12:10:36 +0200 Message-ID: <20161215101036.GW31595@intel.com> References: <1481776147-23041-1-git-send-email-hofrat@osadl.org> <87wpf1pnj2.fsf@intel.com> <20161215092830.GA25458@osadl.at> <87mvfxpli5.fsf@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: <87mvfxpli5.fsf@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Jani Nikula Cc: intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Nicholas Mc Guire , Nicholas Mc Guire , Daniel Vetter List-Id: intel-gfx@lists.freedesktop.org T24gVGh1LCBEZWMgMTUsIDIwMTYgYXQgMTE6NTI6MzRBTSArMDIwMCwgSmFuaSBOaWt1bGEgd3Jv dGU6Cj4gT24gVGh1LCAxNSBEZWMgMjAxNiwgTmljaG9sYXMgTWMgR3VpcmUgPGRlci5oZXJyQGhv ZnIuYXQ+IHdyb3RlOgo+ID4gT24gVGh1LCBEZWMgMTUsIDIwMTYgYXQgMTE6MDg6NDlBTSArMDIw MCwgSmFuaSBOaWt1bGEgd3JvdGU6Cj4gPj4gT24gVGh1LCAxNSBEZWMgMjAxNiwgTmljaG9sYXMg TWMgR3VpcmUgPGhvZnJhdEBvc2FkbC5vcmc+IHdyb3RlOgo+ID4+ID4gRXZlbiBvbiBmYXN0IHN5 c3RlbXMgYSAyIG1pY3Jvc2Vjb25kIGRlbGF5IGlzIG1vc3QgbGlrZWx5IG1vcmUgZWZmaWNpZW50 Cj4gPj4gPiBhcyBhIGJ1c3ktd2FpdCBsb29wLiBUaGUgb3ZlcmhlYWQgb2YgYSBocnRpbWVyIGRv ZXMgbm90IHNlZW0gd2FycmFudGVkIC0KPiA+PiA+IGNoYW5nZSB0aGlzIHRvIGEgdWRlbGF5KDIp Lgo+ID4+IAo+ID4+IFNpbWlsYXIgY29uY2VybnMgYXMgaW4gWzFdLiBXZSBkb24ndCBuZWVkIHRo ZSBhY2N1cmFjeSBvZiB1ZGVsYXkoKSBoZXJlLAo+ID4+IHNvIHRoaXMgYm9pbHMgZG93biB0byB3 aGljaCBpcyB0aGUgYmV0dGVyIHVzZSBvZiBDUFUuIFdlIGNvdWxkIHByb2JhYmx5Cj4gPj4gcmVs YXggdGhlIG1heCBkZWxheSBtb3JlIGlmIHRoYXQgd2FzIGhlbHBmdWwuIEJ1dCBJJ20gbm90IGlt bWVkaWF0ZWx5Cj4gPj4gc29sZCBvbiAiaXMgbW9zdCBsaWtlbHkgbW9yZSBlZmZpY2llbnQiIHdo aWNoIHNvdW5kcyBsaWtlIGEgZ3V0IGZlZWxpbmcuCj4gPj4gCj4gPj4gSSdtIHNvcnJ5IGl0J3Mg bm90IGNsZWFyIGluIG15IG90aGVyIHJlcGx5IHRoYXQgSSBkbyBhcHByZWNpYXRlCj4gPj4gYWRk cmVzc2luZyBpbmNvcnJlY3Qvc2lsbHkgdXNlIG9mIHVzbGVlcF9yYW5nZSgpOyBJJ20ganVzdCBu b3QgKHlldCkKPiA+PiBjb252aW5jZWQgdWRlbGF5KCkgaXMgdGhlIGFuc3dlci4KPiA+Cj4gPiBp ZiB0aGUgZGVsYXkgaXMgbm90IGNyaXRpY2FsIGFuZCBhbGwgdGhhdCBpcyBuZWVkZWQgCj4gPiBp cyBhbiBhc3N1cmFuY2UgdGhhdCBpdCBpcyBncmVhdGVyIHRoYW4gWCB1cyB0aGVuIAo+ID4gdXNs ZWVwX3JhbmdlIGlzIGZpbmUgd2l0aCBhIHJlbGF4ZWQgbGltaXQuIAo+ID4gU28gZnJvbSB3aGF0 IHlvdSB3cm90ZSBteSBwYXRjaCBwcm9wb3NhbCBpcyB3cm9uZyAtIHRoZQo+ID4gdWRlbGF5KCkg aXMgbm90IHRoZSB3YXkgdG8gZ290Lgo+ID4gTXkgaW50ZW50IGlzIHRvIGdldCByaWQgb2YgdmVy eSBzbWFsbCB1c2xlZXBfcmFuZ2UoKSBjYXNlcwo+ID4gc28gaWYgdXNsZWVwX3JhbmdlKDIwLDUw KSBjYXVzZXMgbm8gaXNzdWVzIHdpdGggdGhpcyBkcml2ZXIKPiA+IGFuZCBkb2VzIG5vdCBpbmR1 Y2UgYW55IHBlcmZvcm1hbmNlIHBlbmFsdHkgdGhlbiB0aGF0IHdvdWxkIAo+ID4gYmUgdGhlIHdh eSB0byBnbyBJIHRoaW5rLgo+IAo+IE9rYXksIHNvIEkgbG9va2VkIGF0IHRoZSBjb2RlLCBhbmQg SSBsb29rZWQgYXQgb3VyIHNwZWMsIGFuZCBJIGxvb2tlZCBhdAo+IHRoZSBNSVBJIEQtUEhZIHNw ZWMsIGFuZCBJIGNyaWVkIGEgbGl0dGxlLgo+IAo+IExvbmcgc3Rvcnkgc2hvcnQsIEkgdGhpbmsg dXNsZWVwX3JhbmdlKDEwLCA1MCkgd2lsbCBiZSBmaW5lLgoKTm90ZSB0aGF0IEkgcmVhbGx5IHdh bnQgdG8gc2VlIGEgY29tbWVudCBuZXh0IHRvIGV2ZXJ5IGRlbGF5IGxpa2UgdGhpcwpkb2N1bWVu dGluZyB0aGUgYWN0dWFsIGhhcmR3YXJlIHJlcXVpcmVtZW50LCBpZiB0aGUgZGVsYXkgdXNlZCBi eSB0aGUKY29kZSBkb2Vzbid0IDEwMCUgbWF0Y2ggaXQuCgotLSAKVmlsbGUgU3lyasOkbMOkCklu dGVsIE9UQwpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpJ bnRlbC1nZnggbWFpbGluZyBsaXN0CkludGVsLWdmeEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0 cHM6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngK