From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Vetter Subject: Re: [PATCH] drm/i915: Workaround to avoid lite restore with HEAD==TAIL Date: Fri, 10 Apr 2015 12:01:08 +0200 Message-ID: <20150410100108.GH6092@phenom.ffwll.local> References: <1428658353-20692-1-git-send-email-michel.thierry@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail-wg0-f44.google.com (mail-wg0-f44.google.com [74.125.82.44]) by gabe.freedesktop.org (Postfix) with ESMTP id DD3CC6E0EC for ; Fri, 10 Apr 2015 02:59:10 -0700 (PDT) Received: by wgsk9 with SMTP id k9so12575276wgs.3 for ; Fri, 10 Apr 2015 02:59:10 -0700 (PDT) Content-Disposition: inline In-Reply-To: <1428658353-20692-1-git-send-email-michel.thierry@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Michel Thierry Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org T24gRnJpLCBBcHIgMTAsIDIwMTUgYXQgMTA6MzI6MzNBTSArMDEwMCwgTWljaGVsIFRoaWVycnkg d3JvdGU6Cj4gV2FJZGxlTGl0ZVJlc3RvcmUgaXMgYW4gZXhlY2xpc3RzLW9ubHkgd29ya2Fyb3Vu ZCwgYW5kIHJlcXVpcmVzIHRoZSBkcml2ZXIKPiB0byBlbnN1cmUgdGhhdCBhbnkgY29udGV4dCBh bHdheXMgaGFzIEhFQUQhPVRBSUwgd2hlbiBhdHRlbXB0aW5nIGxpdGUKPiByZXN0b3JlLgo+IAo+ IEFkZCB0d28gZXh0cmEgTUlfTk9PUCBpbnN0cnVjdGlvbnMgYXQgdGhlIGVuZCBvZiBlYWNoIHJl cXVlc3QsIGJ1dCBrZWVwCj4gdGhlIHJlcXVlc3RzIHRhaWwgcG9pbnRpbmcgYmVmb3JlIHRoZSBN SV9OT09Qcy4KPiAKPiBJZiB3ZSBzdWJtaXQgYSBjb250ZXh0IHRvIHRoZSBFTFNQIHdoaWNoIGhh cyBwcmV2aW91c2x5IGJlZW4gc3VibWl0dGVkLAo+IG1vdmUgdGhlIHRhaWwgcG9pbnRlciBwYXN0 IHRoZSBNSV9OT09Qcy4gVGhpcyBlbnN1cmVzIEhFQUQhPVRBSUwuCj4gCj4gU2lnbmVkLW9mZi1i eTogVGhvbWFzIERhbmllbCA8dGhvbWFzLmRhbmllbEBpbnRlbC5jb20+Cj4gU2lnbmVkLW9mZi1i eTogTWljaGVsIFRoaWVycnkgPG1pY2hlbC50aGllcnJ5QGludGVsLmNvbT4KCklzIHRoZXJlIGFu IGlndCB0byBwcm92b2tlIHRoaXM/IEknbSB0aGlua2luZyBvZiBzdWJtaXR0aW5nIHRpbnkgbm9v cApiYXRjaGVzIG9uIDIgYWx0ZXJuYXRpbmcgY29udGV4dHMuIFRoYXQgc2hvdWxkIGJlIGFibGUg dG8gbWFrZSB0aGlzIGdvCmJvb20gcHJldHR5IHJlbGlhYmxlLCB3ZSBvbmx5IG5lZWQgYSBzbGln aHQgZGVsYXkgaW4gcHJvY2Vzc2luZyB0aGUKZXhlY2xpc3QgY29tcGxldGlvbiBpbnRlcnJ1cHQu Ci1EYW5pZWwKCj4gLS0tCj4gIGRyaXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVfZ2VtLmMgIHwgMTEg KysrKysrKysrKysKPiAgZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfbHJjLmMgfCAyOSArKysr KysrKysrKysrKysrKysrKysrKysrKysrKwo+ICAyIGZpbGVzIGNoYW5nZWQsIDQwIGluc2VydGlv bnMoKykKPiAKPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJtL2k5MTUvaTkxNV9nZW0uYyBi L2RyaXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVfZ2VtLmMKPiBpbmRleCBjYTUyMmM5Li5hNDQwNzBh IDEwMDY0NAo+IC0tLSBhL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVfZ2VtLmMKPiArKysgYi9k cml2ZXJzL2dwdS9kcm0vaTkxNS9pOTE1X2dlbS5jCj4gQEAgLTIzODIsNiArMjM4MiwxNyBAQCBp bnQgX19pOTE1X2FkZF9yZXF1ZXN0KHN0cnVjdCBpbnRlbF9lbmdpbmVfY3MgKnJpbmcsCj4gIAly ZXF1ZXN0LT5oZWFkID0gcmVxdWVzdF9zdGFydDsKPiAgCXJlcXVlc3QtPnRhaWwgPSBpbnRlbF9y aW5nX2dldF90YWlsKHJpbmdidWYpOwo+ICAKPiArCWlmIChpOTE1LmVuYWJsZV9leGVjbGlzdHMg JiYKPiArCSAgICAoSVNfR0VOOChyaW5nLT5kZXYpIHx8IElTX0dFTjkocmluZy0+ZGV2KSkpIHsK PiArCQkvKgo+ICsJCSAqIEhlcmUgd2UgYWRkIHR3byBleHRyYSBOT09QcyBhcyBwYWRkaW5nIHRv IGF2b2lkCj4gKwkJICogbGl0ZSByZXN0b3JlIG9mIGEgY29udGV4dCB3aXRoIEhFQUQ9PVRBSUwu Cj4gKwkJICovCj4gKwkJaW50ZWxfbG9naWNhbF9yaW5nX2VtaXQocmluZ2J1ZiwgTUlfTk9PUCk7 Cj4gKwkJaW50ZWxfbG9naWNhbF9yaW5nX2VtaXQocmluZ2J1ZiwgTUlfTk9PUCk7Cj4gKwkJaW50 ZWxfbG9naWNhbF9yaW5nX2FkdmFuY2UocmluZ2J1Zik7Cj4gKwl9Cj4gKwo+ICAJLyogV2hpbHN0 IHRoaXMgcmVxdWVzdCBleGlzdHMsIGJhdGNoX29iaiB3aWxsIGJlIG9uIHRoZQo+ICAJICogYWN0 aXZlX2xpc3QsIGFuZCBzbyB3aWxsIGhvbGQgdGhlIGFjdGl2ZSByZWZlcmVuY2UuIE9ubHkgd2hl biB0aGlzCj4gIAkgKiByZXF1ZXN0IGlzIHJldGlyZWQgd2lsbCB0aGUgdGhlIGJhdGNoX29iaiBi ZSBtb3ZlZCBvbnRvIHRoZQo+IGRpZmYgLS1naXQgYS9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRl bF9scmMuYyBiL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX2xyYy5jCj4gaW5kZXggZjE4Zjk2 Yy4uOGFjZWRjYSAxMDA2NDQKPiAtLS0gYS9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9scmMu Ywo+ICsrKyBiL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX2xyYy5jCj4gQEAgLTQxMyw2ICs0 MTMsMjYgQEAgc3RhdGljIHZvaWQgZXhlY2xpc3RzX2NvbnRleHRfdW5xdWV1ZShzdHJ1Y3QgaW50 ZWxfZW5naW5lX2NzICpyaW5nKQo+ICAJCX0KPiAgCX0KPiAgCj4gKwlpZiAoSVNfR0VOOChyaW5n LT5kZXYpIHx8IElTX0dFTjkocmluZy0+ZGV2KSkgewo+ICsJCS8qCj4gKwkJICogV2FJZGxlTGl0 ZVJlc3RvcmU6IG1ha2Ugc3VyZSB3ZSBuZXZlciBjYXVzZSBhIGxpdGUKPiArCQkgKiByZXN0b3Jl IHdpdGggSEVBRD09VEFJTAo+ICsJCSAqLwo+ICsJCWlmIChyZXEwICYmIHJlcTAtPmVsc3Bfc3Vi bWl0dGVkID09IDEpIHsKPiArCQkJLyoKPiArCQkJICogQ29uc3VtZSB0aGUgYnVmZmVyIE5PT1Bz IHRvIGVuc3VyZSBIRUFEICE9IFRBSUwgd2hlbgo+ICsJCQkgKiBzdWJtaXR0aW5nLiBlbHNwX3N1 Ym1pdHRlZCBjYW4gb25seSBiZSA+MSBhZnRlcgo+ICsJCQkgKiByZXNldCwgaW4gd2hpY2ggY2Fz ZSB3ZSBkb24ndCBuZWVkIHRoZSB3b3JrYXJvdW5kIGFzCj4gKwkJCSAqIGEgbGl0ZSByZXN0b3Jl IHdpbGwgbm90IG9jY3VyLgo+ICsJCQkgKi8KPiArCQkJc3RydWN0IGludGVsX3JpbmdidWZmZXIg KnJpbmdidWY7Cj4gKwo+ICsJCQlyaW5nYnVmID0gcmVxMC0+Y3R4LT5lbmdpbmVbcmluZy0+aWRd LnJpbmdidWY7Cj4gKwkJCXJlcTAtPnRhaWwgKz0gODsKPiArCQkJcmVxMC0+dGFpbCAmPSByaW5n YnVmLT5zaXplIC0gMTsKPiArCQl9Cj4gKwl9Cj4gKwo+ICAJV0FSTl9PTihyZXExICYmIHJlcTEt PmVsc3Bfc3VibWl0dGVkKTsKPiAgCj4gIAlleGVjbGlzdHNfc3VibWl0X2NvbnRleHRzKHJpbmcs IHJlcTAtPmN0eCwgcmVxMC0+dGFpbCwKPiBAQCAtODI5LDYgKzg0OSwxNSBAQCBzdGF0aWMgaW50 IGludGVsX2xvZ2ljYWxfcmluZ19iZWdpbihzdHJ1Y3QgaW50ZWxfcmluZ2J1ZmZlciAqcmluZ2J1 ZiwKPiAgCXN0cnVjdCBkcm1faTkxNV9wcml2YXRlICpkZXZfcHJpdiA9IGRldi0+ZGV2X3ByaXZh dGU7Cj4gIAlpbnQgcmV0Owo+ICAKPiArCWlmIChJU19HRU44KGRldikgfHwgSVNfR0VOOShkZXYp KSB7Cj4gKwkJLyoKPiArCQkgKiBSZXNlcnZlIHNwYWNlIGZvciAyIE5PT1BzIGF0IHRoZSBlbmQg b2YgZWFjaCByZXF1ZXN0IHRvIGJlCj4gKwkJICogdXNlZCBhcyBhIHdvcmthcm91bmQgZm9yIG5v dCBiZWluZyBhbGxvd2VkIHRvIGRvIGxpdGUKPiArCQkgKiByZXN0b3JlIHdpdGggSEVBRD09VEFJ TC4KPiArCQkgKi8KPiArCQludW1fZHdvcmRzICs9IDI7Cj4gKwl9Cj4gKwo+ICAJcmV0ID0gaTkx NV9nZW1fY2hlY2tfd2VkZ2UoJmRldl9wcml2LT5ncHVfZXJyb3IsCj4gIAkJCQkgICBkZXZfcHJp di0+bW0uaW50ZXJydXB0aWJsZSk7Cj4gIAlpZiAocmV0KQo+IC0tIAo+IDIuMS4xCj4gCj4gX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KPiBJbnRlbC1nZngg bWFpbGluZyBsaXN0Cj4gSW50ZWwtZ2Z4QGxpc3RzLmZyZWVkZXNrdG9wLm9yZwo+IGh0dHA6Ly9s aXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngKCi0tIApEYW5p ZWwgVmV0dGVyClNvZnR3YXJlIEVuZ2luZWVyLCBJbnRlbCBDb3Jwb3JhdGlvbgpodHRwOi8vYmxv Zy5mZndsbC5jaApfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f XwpJbnRlbC1nZnggbWFpbGluZyBsaXN0CkludGVsLWdmeEBsaXN0cy5mcmVlZGVza3RvcC5vcmcK aHR0cDovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2ludGVsLWdmeAo=