From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jani Nikula <jani.nikula@linux.intel.com>
Subject: Re: [PATCH v2] drm/i915: Fallback to using
	unmappable	memory for scanout
Date: Wed, 25 Mar 2015 14:21:35 +0200
Message-ID: <87lhilmfn4.fsf@intel.com>
References: <550AAAAC.8000200@linux.intel.com>
 <1426764580-26197-1-git-send-email-chris@chris-wilson.co.uk>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <intel-gfx-bounces@lists.freedesktop.org>
Received: from mga03.intel.com (mga03.intel.com [134.134.136.65])
 by gabe.freedesktop.org (Postfix) with ESMTP id 9DFD86E837
 for <intel-gfx@lists.freedesktop.org>; Wed, 25 Mar 2015 05:22:43 -0700 (PDT)
In-Reply-To: <1426764580-26197-1-git-send-email-chris@chris-wilson.co.uk>
List-Unsubscribe: <http://lists.freedesktop.org/mailman/options/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <http://lists.freedesktop.org/archives/intel-gfx>
List-Post: <mailto:intel-gfx@lists.freedesktop.org>
List-Help: <mailto:intel-gfx-request@lists.freedesktop.org?subject=help>
List-Subscribe: <http://lists.freedesktop.org/mailman/listinfo/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=subscribe>
Errors-To: intel-gfx-bounces@lists.freedesktop.org
Sender: "Intel-gfx" <intel-gfx-bounces@lists.freedesktop.org>
To: Chris Wilson <chris@chris-wilson.co.uk>, intel-gfx@lists.freedesktop.org
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>, "Satyanantha,
 Rama Gopal M" <rama.gopal.m.satyanantha@intel.com>
List-Id: intel-gfx@lists.freedesktop.org

T24gVGh1LCAxOSBNYXIgMjAxNSwgQ2hyaXMgV2lsc29uIDxjaHJpc0BjaHJpcy13aWxzb24uY28u
dWs+IHdyb3RlOgo+IFRoZSBleGlzdGluZyBBQkkgc2F5cyB0aGF0IHNjYW5vdXRzIGFyZSBwaW5u
ZWQgaW50byB0aGUgbWFwcGFibGUgcmVnaW9uCj4gc28gdGhhdCBsZWdhY3kgY2xpZW50cyAoZS5n
LiBvbGQgWG9yZyBvciBwbHltb3V0aGQpIGNhbiB3cml0ZSBkaXJlY3RseQo+IGludG8gdGhlIHNj
YW5vdXQgdGhyb3VnaCBhIEdUVCBtYXBwaW5nLiBIb3dldmVyIGlmIHRoZSBzdXJmYWNlIGRvZXMg
bm90Cj4gZml0IGludG8gdGhlIG1hcHBhYmxlIHJlZ2lvbiwgd2UgYXJlIGJldHRlciBvZmYganVz
dCB0cnlpbmcgdG8gZml0IGl0Cj4gYW55d2hlcmUgYW5kIGhvcGluZyBmb3IgdGhlIGJlc3QuIChB
bnkgdXNlcnNwYWNlIHRoYXQgaXMgY2FwcGFibGUgb2YKPiB1c2luZyBnaW5vcm1vdXMgc2Nhbm91
dHMgaXMgYWxzbyBsaWtlbHkgbm90IHRvIHJlbHkgb24gcHVyZSBHVFQKPiB1cGRhdGVzLikgSW4g
dGhlIGZ1dHVyZSwgdGhlcmUgbWF5IGV2ZW4gYmUgYSBrZXJuZWwgbWVkaWF0ZWQgbWV0aG9kIGZv
cgo+IHRoZSBsZWdhY3kgY2xpZW50cy4KPgo+IHYyOiBTa2lwIGZlbmNlIHBpbm5pbmcgd2hlbiBu
b3QgbWFwcGFibGUuCgpDaHJpcywgdGhpcyBwYXRjaCBjb25mbGljdHMgd2l0aCBjdXJyZW50IG5p
Z2h0bHkgaW4gYSB3YXkgdGhhdCBJJ20gbm90CmNvbWZvcnRhYmxlIHJlc29sdmluZy4KCkJSLApK
YW5pLgoKCj4KPiBTaWduZWQtb2ZmLWJ5OiBDaHJpcyBXaWxzb24gPGNocmlzQGNocmlzLXdpbHNv
bi5jby51az4KPiBDYzogU2F0eWFuYW50aGEsIFJhbWEgR29wYWwgTSA8cmFtYS5nb3BhbC5tLnNh
dHlhbmFudGhhQGludGVsLmNvbT4KPiBDYzogRGVlcGFrIFMgPGRlZXBhay5zQGxpbnV4LmludGVs
LmNvbT4KPiBDYzogRGFtaWVuIExlc3BpYXUgPGRhbWllbi5sZXNwaWF1QGludGVsLmNvbT4KPiBD
YzogRGFuaWVsIFZldHRlciA8ZGFuaWVsLnZldHRlckBmZndsbC5jaD4KPiAtLS0KPiAgZHJpdmVy
cy9ncHUvZHJtL2k5MTUvaTkxNV9nZW0uYyAgICAgIHwgIDcgKysrKysrLQo+ICBkcml2ZXJzL2dw
dS9kcm0vaTkxNS9pbnRlbF9kaXNwbGF5LmMgfCAyMyArKysrKysrKysrKysrLS0tLS0tLS0tLQo+
ICAyIGZpbGVzIGNoYW5nZWQsIDE5IGluc2VydGlvbnMoKyksIDExIGRlbGV0aW9ucygtKQo+Cj4g
ZGlmZiAtLWdpdCBhL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVfZ2VtLmMgYi9kcml2ZXJzL2dw
dS9kcm0vaTkxNS9pOTE1X2dlbS5jCj4gaW5kZXggOWU0OThlMGJiZjIyLi45YTFkZTg0OGU0NTAg
MTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy9ncHUvZHJtL2k5MTUvaTkxNV9nZW0uYwo+ICsrKyBiL2Ry
aXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVfZ2VtLmMKPiBAQCAtNDAzNCwxMCArNDAzNCwxNSBAQCBp
OTE1X2dlbV9vYmplY3RfcGluX3RvX2Rpc3BsYXlfcGxhbmUoc3RydWN0IGRybV9pOTE1X2dlbV9v
YmplY3QgKm9iaiwKPiAgCj4gIAkvKiBBcyB0aGUgdXNlciBtYXkgbWFwIHRoZSBidWZmZXIgb25j
ZSBwaW5uZWQgaW4gdGhlIGRpc3BsYXkgcGxhbmUKPiAgCSAqIChlLmcuIGxpYmttcyBmb3IgdGhl
IGJvb3R1cCBzcGxhc2gpLCB3ZSBoYXZlIHRvIGVuc3VyZSB0aGF0IHdlCj4gLQkgKiBhbHdheXMg
dXNlIG1hcF9hbmRfZmVuY2VhYmxlIGZvciBhbGwgc2Nhbm91dCBidWZmZXJzLgo+ICsJICogYWx3
YXlzIHVzZSBtYXBfYW5kX2ZlbmNlYWJsZSBmb3IgYWxsIHNjYW5vdXQgYnVmZmVycy4gSG93ZXZl
ciwKPiArCSAqIGl0IG1heSBzaW1wbHkgYmUgdG9vIGJpZyB0byBmaXQgaW50byBtYXBwYWJsZSwg
aW4gd2hpY2ggY2FzZQo+ICsJICogcHV0IGl0IGFueXdheSBhbmQgaG9wZSB0aGF0IHVzZXJzcGFj
ZSBjYW4gY29wZSAoYnV0IGFsd2F5cyBmaXJzdAo+ICsJICogdHJ5IHRvIHByZXNlcnZlIHRoZSBl
eGlzdGluZyBBQkkpLgo+ICAJICovCj4gIAlyZXQgPSBpOTE1X2dlbV9vYmpfZ2d0dF9waW4ob2Jq
LCBhbGlnbm1lbnQsIFBJTl9NQVBQQUJMRSk7Cj4gIAlpZiAocmV0KQo+ICsJCXJldCA9IGk5MTVf
Z2VtX29ial9nZ3R0X3BpbihvYmosIGFsaWdubWVudCwgMCk7Cj4gKwlpZiAocmV0KQo+ICAJCWdv
dG8gZXJyX3VucGluX2Rpc3BsYXk7Cj4gIAo+ICAJaTkxNV9nZW1fb2JqZWN0X2ZsdXNoX2NwdV93
cml0ZV9kb21haW4ob2JqKTsKPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50
ZWxfZGlzcGxheS5jIGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfZGlzcGxheS5jCj4gaW5k
ZXggZDYyMWViZWNkMzNlLi42MjhhYWNlNjNiNDMgMTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy9ncHUv
ZHJtL2k5MTUvaW50ZWxfZGlzcGxheS5jCj4gKysrIGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50
ZWxfZGlzcGxheS5jCj4gQEAgLTIzMDgsMTYgKzIzMDgsMTggQEAgaW50ZWxfcGluX2FuZF9mZW5j
ZV9mYl9vYmooc3RydWN0IGRybV9wbGFuZSAqcGxhbmUsCj4gIAlpZiAocmV0KQo+ICAJCWdvdG8g
ZXJyX2ludGVycnVwdGlibGU7Cj4gIAo+IC0JLyogSW5zdGFsbCBhIGZlbmNlIGZvciB0aWxlZCBz
Y2FuLW91dC4gUHJlLWk5NjUgYWx3YXlzIG5lZWRzIGEKPiAtCSAqIGZlbmNlLCB3aGVyZWFzIDk2
NSsgb25seSByZXF1aXJlcyBhIGZlbmNlIGlmIHVzaW5nCj4gLQkgKiBmcmFtZWJ1ZmZlciBjb21w
cmVzc2lvbi4gIEZvciBzaW1wbGljaXR5LCB3ZSBhbHdheXMgaW5zdGFsbAo+IC0JICogYSBmZW5j
ZSBhcyB0aGUgY29zdCBpcyBub3QgdGhhdCBvbmVyb3VzLgo+IC0JICovCj4gLQlyZXQgPSBpOTE1
X2dlbV9vYmplY3RfZ2V0X2ZlbmNlKG9iaik7Cj4gLQlpZiAocmV0KQo+IC0JCWdvdG8gZXJyX3Vu
cGluOwo+ICsJaWYgKG9iai0+bWFwX2FuZF9mZW5jZWFibGUpIHsKPiArCQkvKiBJbnN0YWxsIGEg
ZmVuY2UgZm9yIHRpbGVkIHNjYW4tb3V0LiBQcmUtaTk2NSBhbHdheXMgbmVlZHMgYQo+ICsJCSAq
IGZlbmNlLCB3aGVyZWFzIDk2NSsgb25seSByZXF1aXJlcyBhIGZlbmNlIGlmIHVzaW5nCj4gKwkJ
ICogZnJhbWVidWZmZXIgY29tcHJlc3Npb24uICBGb3Igc2ltcGxpY2l0eSwgd2UgYWx3YXlzLCB3
aGVuCj4gKwkJICogcG9zc2libGUsIGluc3RhbGwgYSBmZW5jZSBhcyB0aGUgY29zdCBpcyBub3Qg
dGhhdCBvbmVyb3VzLgo+ICsJCSAqLwo+ICsJCXJldCA9IGk5MTVfZ2VtX29iamVjdF9nZXRfZmVu
Y2Uob2JqKTsKPiArCQlpZiAocmV0KQo+ICsJCQlnb3RvIGVycl91bnBpbjsKPiAgCj4gLQlpOTE1
X2dlbV9vYmplY3RfcGluX2ZlbmNlKG9iaik7Cj4gKwkJaTkxNV9nZW1fb2JqZWN0X3Bpbl9mZW5j
ZShvYmopOwo+ICsJfQo+ICAKPiAgCWRldl9wcml2LT5tbS5pbnRlcnJ1cHRpYmxlID0gdHJ1ZTsK
PiAgCWludGVsX3J1bnRpbWVfcG1fcHV0KGRldl9wcml2KTsKPiBAQCAtMjMzNSw3ICsyMzM3LDgg
QEAgc3RhdGljIHZvaWQgaW50ZWxfdW5waW5fZmJfb2JqKHN0cnVjdCBkcm1faTkxNV9nZW1fb2Jq
ZWN0ICpvYmopCj4gIHsKPiAgCVdBUk5fT04oIW11dGV4X2lzX2xvY2tlZCgmb2JqLT5iYXNlLmRl
di0+c3RydWN0X211dGV4KSk7Cj4gIAo+IC0JaTkxNV9nZW1fb2JqZWN0X3VucGluX2ZlbmNlKG9i
aik7Cj4gKwlpZiAob2JqLT5tYXBfYW5kX2ZlbmNlYWJsZSkKPiArCQlpOTE1X2dlbV9vYmplY3Rf
dW5waW5fZmVuY2Uob2JqKTsKPiAgCWk5MTVfZ2VtX29iamVjdF91bnBpbl9mcm9tX2Rpc3BsYXlf
cGxhbmUob2JqKTsKPiAgfQo+ICAKPiAtLSAKPiAyLjEuNAo+Cj4gX19fX19fX19fX19fX19fX19f
X19fX19fX19fX19fX19fX19fX19fX19fX19fX18KPiBJbnRlbC1nZnggbWFpbGluZyBsaXN0Cj4g
SW50ZWwtZ2Z4QGxpc3RzLmZyZWVkZXNrdG9wLm9yZwo+IGh0dHA6Ly9saXN0cy5mcmVlZGVza3Rv
cC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngKCi0tIApKYW5pIE5pa3VsYSwgSW50ZWwg
T3BlbiBTb3VyY2UgVGVjaG5vbG9neSBDZW50ZXIKX19fX19fX19fX19fX19fX19fX19fX19fX19f
X19fX19fX19fX19fX19fX19fX18KSW50ZWwtZ2Z4IG1haWxpbmcgbGlzdApJbnRlbC1nZnhAbGlz
dHMuZnJlZWRlc2t0b3Aub3JnCmh0dHA6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9s
aXN0aW5mby9pbnRlbC1nZngK