From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jesse Barnes Subject: Re: [PATCH 1/2] drm/i915: workaround bad DSL readout in start of pipe update Date: Thu, 10 Sep 2015 09:17:23 -0700 Message-ID: <55F1AD13.4090707@virtuousgeek.org> References: <1441899263-12986-1-git-send-email-jbarnes@virtuousgeek.org> <20150910161102.GM29811@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 A4A7D6ECEC for ; Thu, 10 Sep 2015 09:17:53 -0700 (PDT) In-Reply-To: <20150910161102.GM29811@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 T24gMDkvMTAvMjAxNSAwOToxMSBBTSwgVmlsbGUgU3lyasOkbMOkIHdyb3RlOgo+IE9uIFRodSwg U2VwIDEwLCAyMDE1IGF0IDA4OjM0OjIyQU0gLTA3MDAsIEplc3NlIEJhcm5lcyB3cm90ZToKPj4g T24gSFNXIGF0IGxlYXN0IChzdGlsbCB0ZXN0aW5nIG90aGVyIHBsYXRmb3JtcywgYnV0IHNob3Vs ZCBiZSBoYXJtbGVzcwo+PiBlbHNld2hlcmUpLCB0aGUgRFNMIHJlZyByZWFkcyBiYWNrIGFzIDAg d2hlbiByZWFkIGFyb3VuZCB2Ymxhbmsgc3RhcnQKPj4gdGltZS4gIFRoaXMgZW5kcyB1cCBjb25m dXNpbmcgdGhlIGF0b21pYyBzdGFydC9lbmQgY2hlY2tpbmcgY29kZSwgc2luY2UKPj4gaXQgY2F1 c2VzIHRoZSB1cGRhdGUgdG8gYXBwZWFyIGFzIGlmIGl0IGNyb3NzZWQgYSBmcmFtZSBjb3VudCBi b3VuZGFyeS4KPj4gV29ya2Fyb3VuZCB0aGF0IGJ5IGF2b2lkaW5nIHVwZGF0ZXMgaW4gdGhlIGZp cnN0IGNvdXBsZSBvZiBzY2FubGluZXMuCj4+IEluIHRlc3RpbmcsIGV2ZW4gYSBkZWxheSBvZiBh IHNpbmdsZSBtaWNyb3NlY29uZCBpcyBlbm91Z2ggdG8gZ2l2ZSB1cyBhCj4+IGdvb2QgRFNMIHZh bHVlIGFnYWluLCBzbyB0aGUgbWlsbGlzZWNvbmQgd2UnbGwgd2FpdCB3aGVuIHdlIGhpdCB0aGlz Cj4+IGNhc2Ugb2NjYXNpb25hbGx5IG91Z2h0IHRvIGJlIHBsZW50eS4KPj4KPj4gUmVmZXJlbmNl czogaHR0cHM6Ly9idWdzLmZyZWVkZXNrdG9wLm9yZy9zaG93X2J1Zy5jZ2k/aWQ9OTE1NzkKPj4g U2lnbmVkLW9mZi1ieTogSmVzc2UgQmFybmVzIDxqYmFybmVzQHZpcnR1b3VzZ2Vlay5vcmc+Cj4+ IC0tLQo+PiAgZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfc3ByaXRlLmMgfCAxMCArKysrKysr KystCj4+ICAxIGZpbGUgY2hhbmdlZCwgOSBpbnNlcnRpb25zKCspLCAxIGRlbGV0aW9uKC0pCj4+ Cj4+IGRpZmYgLS1naXQgYS9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9zcHJpdGUuYyBiL2Ry aXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX3Nwcml0ZS5jCj4+IGluZGV4IGNhN2UyNjQuLjBjMmM2 MmYgMTAwNjQ0Cj4+IC0tLSBhL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX3Nwcml0ZS5jCj4+ ICsrKyBiL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX3Nwcml0ZS5jCj4+IEBAIC0xMTMsOCAr MTEzLDE2IEBAIHZvaWQgaW50ZWxfcGlwZV91cGRhdGVfc3RhcnQoc3RydWN0IGludGVsX2NydGMg KmNydGMpCj4+ICAJCSAqLwo+PiAgCQlwcmVwYXJlX3RvX3dhaXQod3EsICZ3YWl0LCBUQVNLX1VO SU5URVJSVVBUSUJMRSk7Cj4+ICAKPj4gKwkJLyoKPj4gKwkJICogT24gSFNXLCB0aGUgRFNMIHJl ZyAoMHg3MDAwMCkgYXBwZWFycyB0byByZXR1cm4gMCBpZiB3ZQo+PiArCQkgKiByZWFkIGl0IHJp Z2h0IGFyb3VuZCB0aGUgc3RhcnQgb2YgdmJsYW5rLiAgU28gc2tpcCBwYXN0IGl0Cj4+ICsJCSAq IHNvIHdlIGRvbid0IGFjY2lkZW50YWxseSBlbmQgdXAgc3Bhbm5pbmcgYSB2YmxhbmsgZnJhbWUK Pj4gKwkJICogaW5jcmVtZW50LCBjYXVzaW5nIHRoZSB1cGRhdGVfZW5kKCkgY29kZSB0byBzcXVh ayBhdCB1cy4KPj4gKwkJICogKFdlIHVzZSAyIGluIHRoZSBjb21wYXJpc29uIHRvIGFjY291bnQg Zm9yIHRoZQo+PiArCQkgKiBzY2FubGluZV9vZmZzZXQgdXNlZCB0byBjb3JyZWN0IHRoZSBEU0wg cmVhZG91dC4pCj4+ICsJCSAqLwo+PiAgCQlzY2FubGluZSA9IGludGVsX2dldF9jcnRjX3NjYW5s aW5lKGNydGMpOwo+PiAtCQlpZiAoc2NhbmxpbmUgPCBtaW4gfHwgc2NhbmxpbmUgPiBtYXgpCj4+ ICsJCWlmIChzY2FubGluZSA+IDIgJiYgKHNjYW5saW5lIDwgbWluIHx8IHNjYW5saW5lID4gbWF4 KSkKPj4gIAkJCWJyZWFrOwo+IAo+IEFuZCBpdCBtZWFucyB3ZSdsbCBtaXNzIGEgZnJhbWUgd2hl bmV2ZXIgdGhlIHNjYW5saW5lIGlzIDAtMiBldmVuIG9uIGEKPiBub24tYnJva2VuLiBTbyBJIGRv bid0IGtpa2UgaXQuCgpXZSBvbmx5IHN0YWxsIDFtcyBpbiB0aGUgdGltZW91dCBsYXRlciwgc28g d2Ugc2hvdWxkbid0IG1pc3MgYSBmcmFtZSwgd2UnbGwganVzdCBxdWV1ZSB0aGUgdXBkYXRlIGlu IHRoZSBtaWRkbGUgb2YgaXQgaW5zdGVhZCwgcmlnaHQ/Cgo+IAo+IER1bm5vIG1heWJlIHNvbWV0 aGluZyBtb3JlIHRhcmdldGVkIGxpa2U6Cj4gCj4gcmVhZCBkc2wKPiBpZiAoSVNfSEFTV0VMTCAm JiBzY2FubGluZSA9PSBjcnRjLT5zY2FubGluZV9vZmZzZXQpIHsKPiAJdWRlbGF5KDEpOwo+IAly ZWFkIGRzbCBhZ2Fpbgo+IH0KPiBpbiBfX2ludGVsX2dldF9jcnRjX3NjYW5saW5lKCk/Cj4gCj4g VGhlIHVkZWxheSgpIGlzIGEgYml0IHVuZm9ydHVuYXRlLCBidXQgd2UnbGwgbmVlZCBhY2N1cmF0 ZSBzY2FubGluZQo+IGluZm9ybW5hdGlvbiBmb3IgdGhlIHZibGFuayB0aW1lc3RhbXBzIHRvby4K ClllYWgsIGhpZGluZyBpdCBpbiB0aGUgZ2V0X2NydGNfc2NhbmxpbmUoKSBtaWdodCBiZSBiZXR0 ZXI7IGl0IHdvdWxkIGJlIGdvb2QgdG8ga25vdyBpZiB0aGlzIGFmZmVjdHMgb3RoZXIgcGxhdGZv cm1zIGFzIHdlbGwgdGhvdWdoLiAgTW9yZSB0ZXN0aW5nIGlzIG5lZWRlZCBmb3IgdGhhdC4KCkpl c3NlCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpJbnRl bC1nZnggbWFpbGluZyBsaXN0CkludGVsLWdmeEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cDov L2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2ludGVsLWdmeAo=