From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jani Nikula Subject: Re: [PATCH] drm/i915: Wait for vblank after register read Date: Fri, 20 Apr 2018 11:22:57 +0300 Message-ID: <87lgdie17i.fsf@intel.com> References: <1524038216-22142-1-git-send-email-mika.kahola@intel.com> <87r2nbe18r.fsf@intel.com> <1524206549.16539.24.camel@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id 691CF6E220 for ; Fri, 20 Apr 2018 08:20:14 +0000 (UTC) In-Reply-To: <1524206549.16539.24.camel@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: mika.kahola@intel.com, intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org T24gRnJpLCAyMCBBcHIgMjAxOCwgTWlrYSBLYWhvbGEgPG1pa2Eua2Fob2xhQGludGVsLmNvbT4g d3JvdGU6Cj4gT24gVGh1LCAyMDE4LTA0LTE5IGF0IDE3OjA5ICswMzAwLCBKYW5pIE5pa3VsYSB3 cm90ZToKPj4gT24gV2VkLCAxOCBBcHIgMjAxOCwgTWlrYSBLYWhvbGEgPG1pa2Eua2Fob2xhQGlu dGVsLmNvbT4gd3JvdGU6Cj4+ID4gCj4+ID4gV2hlbiByZWFkaW5nIG91dCBDUkMncyB3ZcKgwqB3 YWl0IGZvciBhIHZibGFuayBvbgo+PiA+IGludGVsX2RwX3NpbmtfY3JjX3N0YXJ0KCkKPj4gPiBm dW5jdGlvbi4gV2hlbiB3ZSBzdGFydCByZWFkaW5nIG91dCBDUkMncyBpbiBpbnRlbF9kcF9zaW5r X2NyYygpCj4+ID4gbG9vcCB3ZQo+PiA+IGZpcnN0IHdhaXQgZm9yIGEgdmJsYW5rIHlpZWxkaW5n IHRoYXQgYWxsIGluIGFsbCB3ZSBlbmQgdXAgd2FpdGluZwo+PiA+IHR3bwo+PiA+IHZibGFua3Mg b24gdGhlIGZpcnN0IGl0ZXJhdGlvbiByb3VuZC4gVGhlcmVmb3JlLCBsZXQncyBtb3ZlIHRoZQo+ PiA+IGludGVsX3dhaXRfZm9yX3ZibGFuaygpIGFzIHRoZSBsYXN0IHJvdXRpbmUgdGhhdCB3ZSBk byBpbiBhbgo+PiA+IGl0ZXJhdGlvbiBsb29wCj4+ID4gaW4gaW50ZWxfZHBfc2lua19jcmMoKS4K Pj4gPiAKPj4gPiBCdWd6aWxsYTogaHR0cHM6Ly9idWdzLmZyZWVkZXNrdG9wLm9yZy9zaG93X2J1 Zy5jZ2k/aWQ9MTAzMTY2Cj4+IFVtbSwgZG8gdGhlIENJIGZhaWx1cmVzIGluIHRoZSBidWcgcmVh bGx5IHVzZSBzaW5rIGNyYywgb3IgYXJlIHRoZXkKPj4gcmF0aGVyIGFib3V0IHBpcGUgY3JjPwo+ PiAKPiBUaGUgYnVnIGlzIG1vcmUgb24gcGlwZSBjcmMuIFRoaXMganVzdCBjYXVnaHQgbXkgYXR0 ZW50aW9uIHdoaWxlIEkgd2FzCj4gbG9va2luZyBpbnRvIHRoZXNlIGJ1Z3MuwqAKCkkgdGhpbmsg dGhlIHByYWN0aWNlIHdlJ3ZlIGFkb3B0ZWQgaXMsCgpCdWd6aWxsYTogPGJ1ZyB0aGF0IHRoaXMg cGF0Y2ggc2hvdWxkIGZpeD4KClJlZmVyZW5jZXM6IDxidWcgb3Igc29tZXRoaW5nIGVsc2UgdGhh dCB0aGlzIHBhdGNoIGlzIHJlbGF0ZWQgdG8+Cgo+IFdhcyB0aGVyZSBhIHJlYXNvbiB3aHkgd2Ug bmVlZCB0byB3YWl0IHR3byB2YmxhbmtzIGhlcmUgYmVmb3JlIHJ1bm5pbmcKPiB0aGUgbG9vcD8K CkkgY2FuJ3QgcmVtZW1iZXIgYnkgaGVhcnQuIEknbSBub3Qgc3VyZSBpZiBpdCB3b3VsZCBtYWtl IG1vcmUgc2Vuc2UgdG8KcmVtb3ZlIHRoZSB2Ymxhbmsgd2FpdCBmcm9tIGludGVsX2RwX3Npbmtf Y3JjX3N0YXJ0KCkgaW5zdGVhZC4gRXZlbiB3aXRoCnlvdXIgcGF0Y2gsIHRoZXJlJ2xsIHN0aWxs IGJlIGFuIGV4dHJhIHZibGFuayB3YWl0LCB5b3UganVzdCBtb3ZlIGl0IHRvCmEgZGlmZmVyZW50 IHBsYWNlLgoKQlIsCkphbmkuCgoKPgo+PiBCUiwKPj4gSmFuaS4KPj4gCj4+IAo+PiA+IAo+PiA+ IFNpZ25lZC1vZmYtYnk6IE1pa2EgS2Fob2xhIDxtaWthLmthaG9sYUBpbnRlbC5jb20+Cj4+ID4g LS0tCj4+ID4gwqBkcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9kcC5jIHwgNSArKystLQo+PiA+ IMKgMSBmaWxlIGNoYW5nZWQsIDMgaW5zZXJ0aW9ucygrKSwgMiBkZWxldGlvbnMoLSkKPj4gPiAK Pj4gPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfZHAuYwo+PiA+IGIv ZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfZHAuYwo+PiA+IGluZGV4IDYyZjgyYzQuLjZlYjk3 ZmEgMTAwNjQ0Cj4+ID4gLS0tIGEvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfZHAuYwo+PiA+ ICsrKyBiL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX2RwLmMKPj4gPiBAQCAtMzk3MiwxMyAr Mzk3MiwxNCBAQCBpbnQgaW50ZWxfZHBfc2lua19jcmMoc3RydWN0IGludGVsX2RwCj4+ID4gKmlu dGVsX2RwLCBzdHJ1Y3QgaW50ZWxfY3J0Y19zdGF0ZSAqY3J0Y19zCj4+ID4gwqAJCXJldHVybiBy ZXQ7Cj4+ID4gwqAKPj4gPiDCoAlkbyB7Cj4+ID4gLQkJaW50ZWxfd2FpdF9mb3JfdmJsYW5rKGRl dl9wcml2LCBpbnRlbF9jcnRjLT5waXBlKTsKPj4gPiAtCj4+ID4gwqAJCWlmIChkcm1fZHBfZHBj ZF9yZWFkYigmaW50ZWxfZHAtPmF1eCwKPj4gPiDCoAkJCQnCoMKgwqDCoMKgwqBEUF9URVNUX1NJ TktfTUlTQywgJmJ1ZikgPAo+PiA+IDApIHsKPj4gPiDCoAkJCXJldCA9IC1FSU87Cj4+ID4gwqAJ CQlnb3RvIHN0b3A7Cj4+ID4gwqAJCX0KPj4gPiArCj4+ID4gKwkJaW50ZWxfd2FpdF9mb3JfdmJs YW5rKGRldl9wcml2LCBpbnRlbF9jcnRjLT5waXBlKTsKPj4gPiArCj4+ID4gwqAJCWNvdW50ID0g YnVmICYgRFBfVEVTVF9DT1VOVF9NQVNLOwo+PiA+IMKgCj4+ID4gwqAJfSB3aGlsZSAoLS1hdHRl bXB0cyAmJiBjb3VudCA9PSAwKTsKCi0tIApKYW5pIE5pa3VsYSwgSW50ZWwgT3BlbiBTb3VyY2Ug VGVjaG5vbG9neSBDZW50ZXIKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX18KSW50ZWwtZ2Z4IG1haWxpbmcgbGlzdApJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0 b3Aub3JnCmh0dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vaW50 ZWwtZ2Z4Cg==