From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jesse Barnes Subject: Re: [PATCH] drm/i915: workaround bad DSL readout v2 Date: Thu, 10 Sep 2015 14:57:32 -0700 Message-ID: <55F1FCCC.2040305@virtuousgeek.org> References: <1441899263-12986-1-git-send-email-jbarnes@virtuousgeek.org> <1441921133-3381-1-git-send-email-jbarnes@virtuousgeek.org> <20150910215301.GI26517@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from gproxy8-pub.mail.unifiedlayer.com (gproxy8-pub.mail.unifiedlayer.com [67.222.33.93]) by gabe.freedesktop.org (Postfix) with SMTP id A4C266E273 for ; Thu, 10 Sep 2015 14:57:59 -0700 (PDT) In-Reply-To: <20150910215301.GI26517@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: =?windows-1252?Q?Ville_Syrj=E4l=E4?= Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org T24gMDkvMTAvMjAxNSAwMjo1MyBQTSwgVmlsbGUgU3lyasOkbMOkIHdyb3RlOgo+IE9uIFRodSwg U2VwIDEwLCAyMDE1IGF0IDAyOjM4OjUzUE0gLTA3MDAsIEplc3NlIEJhcm5lcyB3cm90ZToKPj4g T24gSFNXIGF0IGxlYXN0IChzdGlsbCB0ZXN0aW5nIG90aGVyIHBsYXRmb3JtcywgYnV0IHNob3Vs ZCBiZSBoYXJtbGVzcwo+PiBlbHNld2hlcmUpLCB0aGUgRFNMIHJlZyByZWFkcyBiYWNrIGFzIDAg d2hlbiByZWFkIGFyb3VuZCB2Ymxhbmsgc3RhcnQKPj4gdGltZS4gIFRoaXMgZW5kcyB1cCBjb25m dXNpbmcgdGhlIGF0b21pYyBzdGFydC9lbmQgY2hlY2tpbmcgY29kZSwgc2luY2UKPj4gaXQgY2F1 c2VzIHRoZSB1cGRhdGUgdG8gYXBwZWFyIGFzIGlmIGl0IGNyb3NzZWQgYSBmcmFtZSBjb3VudCBi b3VuZGFyeS4KPj4gQXZvaWQgdGhlIHByb2JsZW0gYnkgbWFraW5nIHN1cmUgd2UgZG9uJ3QgcmV0 dXJuIHNjYW5saW5lX29mZnNldCBmcm9tCj4+IHRoZSBnZXRfY3J0Y19zY2FubGluZSBmdW5jdGlv bi4gIEluIG1vdmluZyB0aGUgY29kZSB0aGVyZSwgSSBhZGQgdG8gYWRkCj4+IGFuIGFkZGl0aW9u YWwgZGVsYXkgc2luY2UgaXQgY291bGQgYmUgY2FsbGVkIGFuZCBoYXZlIGEgbGVnaXRpbWF0ZSAw Cj4+IHJlc3VsdCBmb3Igc29tZSB0aW1lIChkZXBlbmRpbmcgb24gdGhlIHBpeGVsIGNsb2NrKS4K Pj4KPj4gdjI6IG1vdmUgaHN3IGRzbCByZWFkIGhhY2sgdG8gZ2V0X2NydGNfc2NhbmxpbmUgKFZp bGxlKQo+Pgo+PiBSZWZlcmVuY2VzOiBodHRwczovL2J1Z3MuZnJlZWRlc2t0b3Aub3JnL3Nob3df YnVnLmNnaT9pZD05MTU3OQo+PiBTaWduZWQtb2ZmLWJ5OiBKZXNzZSBCYXJuZXMgPGpiYXJuZXNA dmlydHVvdXNnZWVrLm9yZz4KPj4gLS0tCj4+ICBkcml2ZXJzL2dwdS9kcm0vaTkxNS9pOTE1X2ly cS5jIHwgMjEgKysrKysrKysrKysrKysrKysrKysrCj4+ICAxIGZpbGUgY2hhbmdlZCwgMjEgaW5z ZXJ0aW9ucygrKQo+Pgo+PiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJtL2k5MTUvaTkxNV9p cnEuYyBiL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVfaXJxLmMKPj4gaW5kZXggOTBiYzZjMi4u OTdlNWQ1MiAxMDA2NDQKPj4gLS0tIGEvZHJpdmVycy9ncHUvZHJtL2k5MTUvaTkxNV9pcnEuYwo+ PiArKysgYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pOTE1X2lycS5jCj4+IEBAIC02OTcsNiArNjk3 LDI3IEBAIHN0YXRpYyBpbnQgX19pbnRlbF9nZXRfY3J0Y19zY2FubGluZShzdHJ1Y3QgaW50ZWxf Y3J0YyAqY3J0YykKPj4gIAkJcG9zaXRpb24gPSBfX3Jhd19pOTE1X3JlYWQzMihkZXZfcHJpdiwg UElQRURTTChwaXBlKSkgJiBEU0xfTElORU1BU0tfR0VOMzsKPj4gIAo+PiAgCS8qCj4+ICsJICog T24gSFNXLCB0aGUgRFNMIHJlZyAoMHg3MDAwMCkgYXBwZWFycyB0byByZXR1cm4gMCBpZiB3ZQo+ PiArCSAqIHJlYWQgaXQgcmlnaHQgYXJvdW5kIHRoZSBzdGFydCBvZiB2YmxhbmsuICBTbyB0cnkg aXQgYWdhaW4KPj4gKwkgKiBzbyB3ZSBkb24ndCBhY2NpZGVudGFsbHkgZW5kIHVwIHNwYW5uaW5n IGEgdmJsYW5rIGZyYW1lCj4+ICsJICogaW5jcmVtZW50LCBjYXVzaW5nIHRoZSBwaXBlX3VwZGF0 ZV9lbmQoKSBjb2RlIHRvIHNxdWFrIGF0IHVzLgo+PiArCSAqLwo+PiArCWlmIChJU19IQVNXRUxM KGRldikgJiYgIXBvc2l0aW9uKSB7Cj4+ICsJCWludCBpLCB0ZW1wOwo+PiArCj4+ICsJCWZvciAo aSA9IDA7IGkgPCAxMDA7IGkrKykgewo+PiArCQkJdWRlbGF5KDEpOwo+PiArCQkJdGVtcCA9IF9f cmF3X2k5MTVfcmVhZDMyKGRldl9wcml2LCBQSVBFRFNMKHBpcGUpKSAmCj4+ICsJCQkJRFNMX0xJ TkVNQVNLX0dFTjM7Cj4+ICsJCQlpZiAodGVtcCAhPSBwb3NpdGlvbikgewo+PiArCQkJCXBvc2l0 aW9uID0gdGVtcDsKPj4gKwkJCQlnb3RvIG91dDsKPj4gKwkJCX0KPj4gKwkJfQo+PiArCX0KPiAK PiBIbW0uIEFub3RoZXIgaWRlYS4gSWYgaXQgYWx3YXlzIGhhcHBlbnMgYXQgc3RhcnQgb2YgdmJs LCBtYXliZSBoYXZlIGEKPiBsb29rIGF0IHRoZSBJU1IuIElmIHNjYW5saW5lIHJlYWRzIDAsIGJ1 dCBJU1Igc2F5cyB3ZSdyZSBpbiB2YmxhbmssIGp1c3QKPiByZXR1cm4gdmJsYW5rX3N0YXJ0LiBU aGF0J3MgYXNzbWluZyBJU1Igd291bGQgaW4gZmFjdCBzaG93IHRoYXQgaXQncyBpbgo+IHZibGFu ayB3aGVuIHRoaXMgaGFwcGVucy4KClNvdW5kcyBhIGJpdCByYWN5LCB0aG91Z2ggSSBndWVzcyBp dCB3b3VsZG4ndCBodXJ0LiAgSSdtIGFjdHVhbGx5IGEKbGl0dGxlIGR1YmlvdXMgYWJvdXQgdGhp cyBjaGFuZ2UgYW55d2F5IHNpbmNlIGl0IHdpbGwgbWVhbiBsb25nZXIgZGVsYXlzCndoZW4gd2Ug cmVhbGx5IGFyZSBhdCB0aGUgdG9wIG9mIHRoZSBmaWVsZC9mcmFtZS4gIFlvdSBzdXJlIHlvdSBk b24ndApsaWtlIHRoZSBmaXJzdCBvbmUgYmV0dGVyPwoKVGhhbmtzLApKZXNzZQoKX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KSW50ZWwtZ2Z4IG1haWxpbmcg bGlzdApJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHA6Ly9saXN0cy5mcmVlZGVz a3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngK