From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= Subject: Re: [PATCH 1/2] drm/i915: workaround bad DSL readout in start of pipe update Date: Thu, 10 Sep 2015 19:11:02 +0300 Message-ID: <20150910161102.GM29811@intel.com> References: <1441899263-12986-1-git-send-email-jbarnes@virtuousgeek.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTP id E90886ECE3 for ; Thu, 10 Sep 2015 09:11:05 -0700 (PDT) Content-Disposition: inline In-Reply-To: <1441899263-12986-1-git-send-email-jbarnes@virtuousgeek.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Jesse Barnes Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org T24gVGh1LCBTZXAgMTAsIDIwMTUgYXQgMDg6MzQ6MjJBTSAtMDcwMCwgSmVzc2UgQmFybmVzIHdy b3RlOgo+IE9uIEhTVyBhdCBsZWFzdCAoc3RpbGwgdGVzdGluZyBvdGhlciBwbGF0Zm9ybXMsIGJ1 dCBzaG91bGQgYmUgaGFybWxlc3MKPiBlbHNld2hlcmUpLCB0aGUgRFNMIHJlZyByZWFkcyBiYWNr IGFzIDAgd2hlbiByZWFkIGFyb3VuZCB2Ymxhbmsgc3RhcnQKPiB0aW1lLiAgVGhpcyBlbmRzIHVw IGNvbmZ1c2luZyB0aGUgYXRvbWljIHN0YXJ0L2VuZCBjaGVja2luZyBjb2RlLCBzaW5jZQo+IGl0 IGNhdXNlcyB0aGUgdXBkYXRlIHRvIGFwcGVhciBhcyBpZiBpdCBjcm9zc2VkIGEgZnJhbWUgY291 bnQgYm91bmRhcnkuCj4gV29ya2Fyb3VuZCB0aGF0IGJ5IGF2b2lkaW5nIHVwZGF0ZXMgaW4gdGhl IGZpcnN0IGNvdXBsZSBvZiBzY2FubGluZXMuCj4gSW4gdGVzdGluZywgZXZlbiBhIGRlbGF5IG9m IGEgc2luZ2xlIG1pY3Jvc2Vjb25kIGlzIGVub3VnaCB0byBnaXZlIHVzIGEKPiBnb29kIERTTCB2 YWx1ZSBhZ2Fpbiwgc28gdGhlIG1pbGxpc2Vjb25kIHdlJ2xsIHdhaXQgd2hlbiB3ZSBoaXQgdGhp cwo+IGNhc2Ugb2NjYXNpb25hbGx5IG91Z2h0IHRvIGJlIHBsZW50eS4KPiAKPiBSZWZlcmVuY2Vz OiBodHRwczovL2J1Z3MuZnJlZWRlc2t0b3Aub3JnL3Nob3dfYnVnLmNnaT9pZD05MTU3OQo+IFNp Z25lZC1vZmYtYnk6IEplc3NlIEJhcm5lcyA8amJhcm5lc0B2aXJ0dW91c2dlZWsub3JnPgo+IC0t LQo+ICBkcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9zcHJpdGUuYyB8IDEwICsrKysrKysrKy0K PiAgMSBmaWxlIGNoYW5nZWQsIDkgaW5zZXJ0aW9ucygrKSwgMSBkZWxldGlvbigtKQo+IAo+IGRp ZmYgLS1naXQgYS9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9zcHJpdGUuYyBiL2RyaXZlcnMv Z3B1L2RybS9pOTE1L2ludGVsX3Nwcml0ZS5jCj4gaW5kZXggY2E3ZTI2NC4uMGMyYzYyZiAxMDA2 NDQKPiAtLS0gYS9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9zcHJpdGUuYwo+ICsrKyBiL2Ry aXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX3Nwcml0ZS5jCj4gQEAgLTExMyw4ICsxMTMsMTYgQEAg dm9pZCBpbnRlbF9waXBlX3VwZGF0ZV9zdGFydChzdHJ1Y3QgaW50ZWxfY3J0YyAqY3J0YykKPiAg CQkgKi8KPiAgCQlwcmVwYXJlX3RvX3dhaXQod3EsICZ3YWl0LCBUQVNLX1VOSU5URVJSVVBUSUJM RSk7Cj4gIAo+ICsJCS8qCj4gKwkJICogT24gSFNXLCB0aGUgRFNMIHJlZyAoMHg3MDAwMCkgYXBw ZWFycyB0byByZXR1cm4gMCBpZiB3ZQo+ICsJCSAqIHJlYWQgaXQgcmlnaHQgYXJvdW5kIHRoZSBz dGFydCBvZiB2YmxhbmsuICBTbyBza2lwIHBhc3QgaXQKPiArCQkgKiBzbyB3ZSBkb24ndCBhY2Np ZGVudGFsbHkgZW5kIHVwIHNwYW5uaW5nIGEgdmJsYW5rIGZyYW1lCj4gKwkJICogaW5jcmVtZW50 LCBjYXVzaW5nIHRoZSB1cGRhdGVfZW5kKCkgY29kZSB0byBzcXVhayBhdCB1cy4KPiArCQkgKiAo V2UgdXNlIDIgaW4gdGhlIGNvbXBhcmlzb24gdG8gYWNjb3VudCBmb3IgdGhlCj4gKwkJICogc2Nh bmxpbmVfb2Zmc2V0IHVzZWQgdG8gY29ycmVjdCB0aGUgRFNMIHJlYWRvdXQuKQo+ICsJCSAqLwo+ ICAJCXNjYW5saW5lID0gaW50ZWxfZ2V0X2NydGNfc2NhbmxpbmUoY3J0Yyk7Cj4gLQkJaWYgKHNj YW5saW5lIDwgbWluIHx8IHNjYW5saW5lID4gbWF4KQo+ICsJCWlmIChzY2FubGluZSA+IDIgJiYg KHNjYW5saW5lIDwgbWluIHx8IHNjYW5saW5lID4gbWF4KSkKPiAgCQkJYnJlYWs7CgpBbmQgaXQg bWVhbnMgd2UnbGwgbWlzcyBhIGZyYW1lIHdoZW5ldmVyIHRoZSBzY2FubGluZSBpcyAwLTIgZXZl biBvbiBhCm5vbi1icm9rZW4uIFNvIEkgZG9uJ3Qga2lrZSBpdC4KCkR1bm5vIG1heWJlIHNvbWV0 aGluZyBtb3JlIHRhcmdldGVkIGxpa2U6CgpyZWFkIGRzbAppZiAoSVNfSEFTV0VMTCAmJiBzY2Fu bGluZSA9PSBjcnRjLT5zY2FubGluZV9vZmZzZXQpIHsKCXVkZWxheSgxKTsKCXJlYWQgZHNsIGFn YWluCn0KaW4gX19pbnRlbF9nZXRfY3J0Y19zY2FubGluZSgpPwoKVGhlIHVkZWxheSgpIGlzIGEg Yml0IHVuZm9ydHVuYXRlLCBidXQgd2UnbGwgbmVlZCBhY2N1cmF0ZSBzY2FubGluZQppbmZvcm1u YXRpb24gZm9yIHRoZSB2YmxhbmsgdGltZXN0YW1wcyB0b28uCgo+ICAKPiAgCQlpZiAodGltZW91 dCA8PSAwKSB7Cj4gLS0gCj4gMS45LjEKPiAKPiBfX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fXwo+IEludGVsLWdmeCBtYWlsaW5nIGxpc3QKPiBJbnRlbC1nZnhA bGlzdHMuZnJlZWRlc2t0b3Aub3JnCj4gaHR0cDovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWls bWFuL2xpc3RpbmZvL2ludGVsLWdmeAoKLS0gClZpbGxlIFN5cmrDpGzDpApJbnRlbCBPVEMKX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KSW50ZWwtZ2Z4IG1h aWxpbmcgbGlzdApJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHA6Ly9saXN0cy5m cmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngK