From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg Kroah-Hartman Subject: Re: Potential BUG in drm/i915/execlists: Reset RING registers upon resume Date: Wed, 12 Apr 2017 15:55:10 +0200 Message-ID: <20170412135510.GA6989@kroah.com> References: <1489443835.5568.7.camel@mailbox.org> <87fui8at69.fsf@intel.com> <20170320151358.GB14800@kroah.com> <20170412125521.GA10624@kroah.com> <87tw5twxxo.fsf@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) by gabe.freedesktop.org (Postfix) with ESMTPS id A88B16E1F1 for ; Wed, 12 Apr 2017 13:55:20 +0000 (UTC) Content-Disposition: inline In-Reply-To: <87tw5twxxo.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: Damian Dominik Martinez Dreyer , intel-gfx@lists.freedesktop.org, stable@vger.kernel.org, Eric Blau List-Id: intel-gfx@lists.freedesktop.org T24gV2VkLCBBcHIgMTIsIDIwMTcgYXQgMDQ6MzU6NDdQTSArMDMwMCwgSmFuaSBOaWt1bGEgd3Jv dGU6Cj4gT24gV2VkLCAxMiBBcHIgMjAxNywgR3JlZyBLcm9haC1IYXJ0bWFuIDxncmVna2hAbGlu dXhmb3VuZGF0aW9uLm9yZz4gd3JvdGU6Cj4gPiBPbiBNb24sIE1hciAyMCwgMjAxNyBhdCAxMToy NDozOEFNIC0wNDAwLCBFcmljIEJsYXUgd3JvdGU6Cj4gPj4gT24gTW9uLCBNYXIgMjAsIDIwMTcg YXQgMTE6MTMgQU0sIEdyZWcgS3JvYWgtSGFydG1hbgo+ID4+IDxncmVna2hAbGludXhmb3VuZGF0 aW9uLm9yZz4gd3JvdGU6Cj4gPj4gPiBPbiBNb24sIE1hciAyMCwgMjAxNyBhdCAwNTowMTozNFBN ICswMjAwLCBKYW5pIE5pa3VsYSB3cm90ZToKPiA+PiA+PiBPbiBUdWUsIDE0IE1hciAyMDE3LCBF cmljIEJsYXUgPGVibGF1QGVibGF1LmNvbT4gd3JvdGU6Cj4gPj4gPj4gPiBUaGF0J3MgZnVubnku IEkgaGF2ZSBhIE1hY0Jvb2sgUHJvIDEyLDEgZnJvbSBsYXRlIDIwMTUuIEhpYmVybmF0ZQo+ID4+ ID4+ID4gZmFpbGVkIGZvciBtZSBpbiA0LjkuNiB0aHJvdWdoIDQuOS44IChwb3NzaWJseSBlYXJs aWVyIGFzIHdlbGwsIEkgZG8KPiA+PiA+PiA+IG5vIHJlY2FsbCkgd2l0aG91dCB0aGUgcGF0Y2gu IFRoZSBwYXRjaCB5b3UgcmVmZXJlbmNlIGZpeGVkIG15IHByb2JsZW0KPiA+PiA+PiA+IGFuZCBh cHBhcmVudGx5IG1hbnkgb3RoZXJzIGJhc2VkIG9uIHRoZSBidWcgcmVwb3J0czoKPiA+PiA+PiA+ Cj4gPj4gPj4gPiBodHRwczovL2J1Z3MuZnJlZWRlc2t0b3Aub3JnL3Nob3dfYnVnLmNnaT9pZD05 NjUyNgo+ID4+ID4+ID4KPiA+PiA+PiA+IEkgYXBwbGllZCB0aGUgcGF0Y2ggbXlzZWxmIGluIDQu OS42IHRocm91Z2ggNC45LjggYW5kIGhpYmVybmF0ZSB3b3Jrcwo+ID4+ID4+ID4gZm9yIG1lLiBJ IGhhdmUgcnVuIHZhbmlsbGEgNC45LjkgYW5kIDQuMTAuMSBhbmQgaW4gYm90aCBoaWJlcm5hdGUK PiA+PiA+PiA+IHdvcmtzLgo+ID4+ID4+Cj4gPj4gPj4gU28gSSdtIHF1aXRlIHN1cnByaXNlZAo+ ID4+ID4+Cj4gPj4gPj4gY29tbWl0IGYyYTA0MDlhMDg1MDJkNjRmYmUzOTkwMzU0ZGZmNTkwMmIw OGQyZmIKPiA+PiA+PiBBdXRob3I6IENocmlzIFdpbHNvbiA8Y2hyaXNAY2hyaXMtd2lsc29uLmNv LnVrPgo+ID4+ID4+IERhdGU6ICAgV2VkIFNlcCAyMSAxNDo1MTowOCAyMDE2ICswMTAwCj4gPj4g Pj4KPiA+PiA+PiAgICAgZHJtL2k5MTUvZXhlY2xpc3RzOiBSZXNldCBSSU5HIHJlZ2lzdGVycyB1 cG9uIHJlc3VtZQo+ID4+ID4+Cj4gPj4gPj4gICAgIGNvbW1pdCBiYWZiMmY3ZDQ3NTViZjE1NzFi ZDVlOWEwM2I5N2YzZmM0ZmU2OWFlIHVwc3RyZWFtLgo+ID4+ID4+Cj4gPj4gPj4gZW5kZWQgdXAg aW4gdjQuOS45IGNvbnNpZGVyaW5nIHRoYXQgdGhlIHVwc3RyZWFtIGNvbW1pdCBpcyBub3QgYW5u b3RhdGVkCj4gPj4gPj4gZm9yIHN0YWJsZSwgaXQgaGFzIG5vIEZpeGVzOiB0YWdzLCBhbmQgSSBj YW4ndCBmaW5kIGFueSBiYWNrcG9ydAo+ID4+ID4+IHJlcXVlc3RzIG9yIGV2ZW4gbm90aWZpY2F0 aW9ucyBmb3IgaXQgaW4gbXkgbWFpbHMuIChBZG1pdHRlZGx5IEknbSBub3QKPiA+PiA+PiBzdWJz Y3JpYmVkIG9uIHN0YWJsZUAsIGJ1dCBJJ2QgZXhwZWN0IG91ciBsaXN0cywgbWFpbnRhaW5lcnMg b3IKPiA+PiA+PiBkZXZlbG9wZXJzIGJlIENjJ2QuKQo+ID4+ID4KPiA+PiA+IEVyaWMgc2VudCB0 aGlzIHRvIHRoZSBzdGFibGUgbGlzdCBhIGZldyB0aW1lcywgbXkgbWlzdGFrZSBmb3Igbm90IHNl ZWluZwo+ID4+ID4gaGUgaGFkbid0IGFsc28gY2M6ZWQgdGhlIGRldmVsb3BlciBsaXN0Lgo+ID4+ ID4KPiA+PiA+IFdhbnQgbWUgdG8gcmV2ZXJ0IGl0Pwo+ID4+ID4KPiA+PiA+IHRoYW5rcywKPiA+ PiA+Cj4gPj4gPiBncmVnIGstaAo+ID4+IAo+ID4+IE15IGFwb2xvZ2llcy4gSSdtIG5ldyB0byBy ZXF1ZXN0aW5nIHN0YWJsZSBwYXRjaGVzLCBidXQgSSB0aG91Z2h0Cj4gPj4gc2VuZGluZyB0byB0 aGUgc3RhYmxlIG1haWxpbmcgbGlzdHMgd291bGQga2VlcCB0aGUgcHJvcGVyIGZvbGtzIGluIHRo ZQo+ID4+IGxvb3AuIFNvcnJ5IGFib3V0IHRoYXQuCj4gPj4gCj4gPj4gVGhlIGJ1ZyB0aGF0IHRo ZSBjb21taXQgZml4ZXMgaGFzIHF1aXRlIGEgbG9uZyBkb2N1bWVudGF0aW9uIHRyYWlsOgo+ID4+ IAo+ID4+IFtCQVQgZXhlY2xpc3RzXSBTcG9yYWRpYyAtIGdlbV9leGVjX3N1c3BlbmQgYmFzaWMt czQgR1BVIGhhbmcgYWZ0ZXIgcmVzdW1lCj4gPj4gaHR0cHM6Ly9idWdzLmZyZWVkZXNrdG9wLm9y Zy9zaG93X2J1Zy5jZ2k/aWQ9OTY1MjYKPiA+PiAKPiA+PiBJJ3ZlIGhhZCBwcm9ibGVtcyB3aXRo IHRoYXQgb25lIGFuZCB0aGlzIG9uZSB0aGF0IGlzIG5vdCBmaXhlZCBpbiA0LjEwLnggc3RhYmxl Ogo+ID4+IAo+ID4+IFtSZWdyZXNzaW9uIEJEV10ga2VybmVsIHBhbmljIGluIEludGVsIGk5MTUg bW9kdWxlLCBjb21wbGV0ZSBzeXN0ZW0KPiA+PiBmcmVlemUgaW4gNC4xMC1yYzIKPiA+PiBodHRw czovL2J1Z3MuZnJlZWRlc2t0b3Aub3JnL3Nob3dfYnVnLmNnaT9pZD05OTI5NQo+ID4KPiA+IFNv LCB3aGF0IG5lZWRzIHRvIGJlIGRvbmUgaGVyZT8KPiA+Cj4gPiBEbyBJIG5lZWQgdG8gcmV2ZXJ0 IHNvbWV0aGluZyBpbiA0Ljk/IEFkZCBzb21ldGhpbmc/ICBEbyBzb21ldGhpbmcgZWxzZT8KPiA+ Cj4gPiB0b3RhbGx5IGNvbmZ1c2VkLAo+IAo+IEkgZGlkIHJlcGx5IHRvIHlvdSBbMV06Cj4gCj4g Pj4gV2FudCBtZSB0byByZXZlcnQgaXQ/Cj4gPgo+ID4gQ2hyaXMgc2F5cyB0aGF0IHdvdWxkIGJl IHRoZSBjb3JyZWN0IHRoaW5nIHRvIGRvLiBJJ20gbm8gZXhwZXJ0IGluIHRoZQo+ID4gYXJlYSwg YnV0IElJVUMgaGF2aW5nIGp1c3QgdGhhdCBjb21taXQgYmFja3BvcnRlZCBpcyBub3QgZW5vdWdo LAo+ID4gc29tZXRoaW5nIG1vcmUgd291bGQgYmUgbmVlZGVkLCBidXQgd2UncmUgbm90IHN1cmUg eWV0IHdoYXQgZXhhY3RseSBhbmQKPiA+IGlmIHRob3NlIGRlcGVuZGVuY2llcyBjYW4gZWFzaWx5 IGJlIGJhY2twb3J0ZWQuCj4gCj4gIml0IiBiZWluZyBjb21taXQgZjJhMDQwOWEwODUwICgiZHJt L2k5MTUvZXhlY2xpc3RzOiBSZXNldCBSSU5HCj4gcmVnaXN0ZXJzIHVwb24gcmVzdW1lIikgaW4g NC45LjkrLgoKQWgsIG9rLCBub3cgcmV2ZXJ0ZWQsIHRoYW5rcy4KCmdyZWcgay1oCl9fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCkludGVsLWdmeCBtYWlsaW5n IGxpc3QKSW50ZWwtZ2Z4QGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3RzLmZyZWVk ZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2ludGVsLWdmeAo=