From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Keeping Subject: Re: [PATCH] drm/rockchip: fix VOP vblank race Date: Mon, 16 Apr 2018 17:46:56 +0100 Message-ID: <20180416174656.6c113081.john@metanate.com> References: <20180328160351.23763-1-john@metanate.com> <38a49065-4667-4d91-3191-ec81b03cba44@rock-chips.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <38a49065-4667-4d91-3191-ec81b03cba44@rock-chips.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Sandy Huang Cc: linux-rockchip@lists.infradead.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org List-Id: linux-rockchip.vger.kernel.org SGkgU2FuZHksCgpPbiBUdWUsIDEwIEFwciAyMDE4IDIwOjQwOjA2ICswODAwLCBTYW5keSBIdWFu ZyB3cm90ZToKCj4gUmV2aWV3ZWQtYnk6IFNhbmR5IGh1YW5nIDxoamNAcm9jay1jaGlwcy5jb20+ CgpUaGFua3MgZm9yIHRoZSByZXZpZXcsIGJ1dCBJIGRvbid0IHNlZSB0aGlzIGluIGRybS1taXNj IHlldC4gIEFyZSB5b3UKcGxhbm5pbmcgdG8gcGljayB0aGlzIHVwPwoKPiDlnKggMjAxOC8zLzI5 IDA6MDMsIEpvaG4gS2VlcGluZyDlhpnpgZM6Cj4gPiBXZSBoYXZlIHNlZW4gYSBjYXNlIG9mIGEg YmFkIHJlZmVyZW5jZSBjb3VudCBmb3IgdmJsYW5rcyB3aXRoIHRoZQo+ID4gUm9ja2NoaXAgVk9Q Ogo+ID4KPiA+IAktLS0tLS0tLS0tLS1bIGN1dCBoZXJlIF0tLS0tLS0tLS0tLS0KPiA+IAlXQVJO SU5HOiBDUFU6IDEgUElEOiAzODMgYXQgZHJpdmVycy9ncHUvZHJtL2RybV9pcnEuYzoxMTk4IGRy bV92YmxhbmtfcHV0KzB4NDAvMHhjYwo+ID4gCU1vZHVsZXMgbGlua2VkIGluOiBicmNtZm1hYyBi cmNtdXRpbAo+ID4gCUNQVTogMSBQSUQ6IDM4MyBDb21tOiBrd29ya2VyL3U4OjIgTm90IHRhaW50 ZWQgNC45Ljc1LXJ0NjAgIzEKPiA+IAlIYXJkd2FyZSBuYW1lOiBSb2NrY2hpcCAoRGV2aWNlIFRy ZWUpCj4gPiAJV29ya3F1ZXVlOiBldmVudHNfdW5ib3VuZCBmbGlwX3dvcmtlcgo+ID4gCUJhY2t0 cmFjZToKPiA+IAlbPGMwMTBiN2IwPl0gKGR1bXBfYmFja3RyYWNlKSBmcm9tIFs8YzAxMGJhNGM+ XSAoc2hvd19zdGFjaysweDE4LzB4MWMpCj4gPiAJIHI3OmMwYjFiMTNjIHI2OjYwMGIwMDEzIHI1 OjAwMDAwMDAwIHI0OmMwYjFiMTNjCj4gPiAJWzxjMDEwYmEzND5dIChzaG93X3N0YWNrKSBmcm9t IFs8YzAzMmQyNDg+XSAoZHVtcF9zdGFjaysweDc4LzB4OTQpCj4gPiAJWzxjMDMyZDFkMD5dIChk dW1wX3N0YWNrKSBmcm9tIFs8YzAxMWU2ZTg+XSAoX193YXJuKzB4ZTQvMHgxMDQpCj4gPiAJIHI3 OjAwMDAwMDA5IHI2OmMwM2NmMjZjIHI1OjAwMDAwMDAwIHI0OjAwMDAwMDAwCj4gPiAJWzxjMDEx ZTYwND5dIChfX3dhcm4pIGZyb20gWzxjMDExZTdjMD5dICh3YXJuX3Nsb3dwYXRoX251bGwrMHgy OC8weDMwKQo+ID4gCSByOTplZWI0NDNhMCByODplZWI0NDNjOCByNzplZThhNWVjMCByNjplZThh NWVjMCByNTplZGI0N2YwMCByNDplZTA5NjIwMAo+ID4gCVs8YzAxMWU3OTg+XSAod2Fybl9zbG93 cGF0aF9udWxsKSBmcm9tIFs8YzAzY2YyNmM+XSAoZHJtX3ZibGFua19wdXQrMHg0MC8weGNjKQo+ ID4gCVs8YzAzY2YyMmM+XSAoZHJtX3ZibGFua19wdXQpIGZyb20gWzxjMDNjZjMxMD5dIChkcm1f Y3J0Y192YmxhbmtfcHV0KzB4MTgvMHgxYykKPiA+IAkgcjU6ZWRiNDdmMDAgcjQ6ZWUzYzhhODAK PiA+IAlbPGMwM2NmMmY4Pl0gKGRybV9jcnRjX3ZibGFua19wdXQpIGZyb20gWzxjMDNlZjliND5d ICh2b3BfZmJfdW5yZWZfd29ya2VyKzB4MTgvMHgyNCkKPiA+IAlbPGMwM2VmOTljPl0gKHZvcF9m Yl91bnJlZl93b3JrZXIpIGZyb20gWzxjMDNkZjE5ND5dIChmbGlwX3dvcmtlcisweDk4LzB4YjQp Cj4gPiAJIHI1OmVkYjQ3ZjAwIHI0OmVlYjQ0M2E4Cj4gPiAJWzxjMDNkZjBmYz5dIChmbGlwX3dv cmtlcikgZnJvbSBbPGMwMTM0ODA4Pl0gKHByb2Nlc3Nfb25lX3dvcmsrMHgxYTgvMHgyZmMpCj4g PiAJIHI5OjAwMDAwMDAwIHI4OmVlODA3ZDAwIHI3OjAwMDAwMDAwIHI2OmVlODA5YzAwIHI1OmVl YjQ0M2E4IHI0OmVkZmU1ZjgwCj4gPiAJWzxjMDEzNDY2MD5dIChwcm9jZXNzX29uZV93b3JrKSBm cm9tIFs8YzAxMzU4ZWM+XSAod29ya2VyX3RocmVhZCsweDJhYy8weDQ1OCkKPiA+IAkgcjEwOjAw MDAwMDg4IHI5OmVkZmU1Zjk4IHI4OmVlODA5YzJjIHI3OmMwYjA0MTAwIHI2OmVlODA5YzAwIHI1 OmVlODA5YzAwCj4gPiAJIHI0OmVkZmU1ZjgwCj4gPiAJWzxjMDEzNTY0MD5dICh3b3JrZXJfdGhy ZWFkKSBmcm9tIFs8YzAxM2EwYmM+XSAoa3RocmVhZCsweGZjLzB4MTBjKQo+ID4gCSByMTA6MDAw MDAwMDAgcjk6MDAwMDAwMDAgcjg6YzAxMzU2NDAgcjc6ZWRmZTVmODAgcjY6MDAwMDAwMDAgcjU6 ZWRmMGUyNDAKPiA+IAkgcjQ6ZWU4YTQwMDAgcjM6ZWQxOTRlMDAKPiA+IAlbPGMwMTM5ZmMwPl0g KGt0aHJlYWQpIGZyb20gWzxjMDEwN2NiOD5dIChyZXRfZnJvbV9mb3JrKzB4MTQvMHgzYykKPiA+ IAkgcjg6MDAwMDAwMDAgcjc6MDAwMDAwMDAgcjY6MDAwMDAwMDAgcjU6YzAxMzlmYzAgcjQ6ZWRm MGUyNDAKPiA+IAktLS1bIGVuZCB0cmFjZSAwMDAwMDAwMDAwMDAwMDAyIF0tLS0KPiA+Cj4gPiBJ dCBzZWVtcyB0aGF0IHRoaXMgaXMgY2F1c2VkIGJ5IHVuZm9ydHVuYXRlIHRpbWluZyBiZXR3ZWVu Cj4gPiB2b3BfY3J0Y19hdG9taWNfZmx1c2goKSBhbmQgdm9wX2hhbmRsZV92YmxhbmsoKSBnaXZl biB0aGUgZm9sbG93aW5nCj4gPiBvcmRlcmluZzoKPiA+Cj4gPiAJYXRvbWljX2ZsdXNoCQloYW5k bGVfdmJsYW5rCj4gPiAJLS0tLS0tLS0tLS0tCQktLS0tLS0tLS0tLS0tCj4gPgo+ID4gCWRybV9m bGlwX3dvcmtfcXVldWUKPiA+IAlzZXRfYml0Cj4gPiAJICAgICAJCQlpZiAodGVzdF9hbmRfY2xl YXJfYml0KC4uLikpCj4gPiAJICAgICAJCQkJZHJtX2ZsaXBfd29ya19jb21taXQKPiA+IAlkcm1f dmJsYW5rX2dldAo+ID4KPiA+IFRoaXMgcmVzdWx0cyBpbiB2b3BfZmJfdW5yZWZfd29ya2VyIChj YWxsZWQgYXMgZmxpcCB3b3JrKSBkZWNyZW1lbnRpbmcKPiA+IHRoZSB2YmxhbmsgcmVmY291bnQg YmVmb3JlIGl0IGhhcyBiZWVuIGluY3JlbWVudGVkLgo+ID4KPiA+IFNpZ25lZC1vZmYtYnk6IEpv aG4gS2VlcGluZyA8am9obkBtZXRhbmF0ZS5jb20+Cj4gPiAtLS0KPiA+ICAgZHJpdmVycy9ncHUv ZHJtL3JvY2tjaGlwL3JvY2tjaGlwX2RybV92b3AuYyB8IDIgKy0KPiA+ICAgMSBmaWxlIGNoYW5n ZWQsIDEgaW5zZXJ0aW9uKCspLCAxIGRlbGV0aW9uKC0pCj4gPgo+ID4gZGlmZiAtLWdpdCBhL2Ry aXZlcnMvZ3B1L2RybS9yb2NrY2hpcC9yb2NrY2hpcF9kcm1fdm9wLmMgYi9kcml2ZXJzL2dwdS9k cm0vcm9ja2NoaXAvcm9ja2NoaXBfZHJtX3ZvcC5jCj4gPiBpbmRleCA2NzU1YTllZWE0YjIuLmQ0 ZTE0MDBhZWRmMyAxMDA2NDQKPiA+IC0tLSBhL2RyaXZlcnMvZ3B1L2RybS9yb2NrY2hpcC9yb2Nr Y2hpcF9kcm1fdm9wLmMKPiA+ICsrKyBiL2RyaXZlcnMvZ3B1L2RybS9yb2NrY2hpcC9yb2NrY2hp cF9kcm1fdm9wLmMKPiA+IEBAIC0xMDE3LDkgKzEwMTcsOSBAQCBzdGF0aWMgdm9pZCB2b3BfY3J0 Y19hdG9taWNfZmx1c2goc3RydWN0IGRybV9jcnRjICpjcnRjLAo+ID4gICAJCQljb250aW51ZTsK PiA+ICAgCj4gPiAgIAkJZHJtX2ZyYW1lYnVmZmVyX2dldChvbGRfcGxhbmVfc3RhdGUtPmZiKTsK PiA+ICsJCVdBUk5fT04oZHJtX2NydGNfdmJsYW5rX2dldChjcnRjKSAhPSAwKTsKPiA+ICAgCQlk cm1fZmxpcF93b3JrX3F1ZXVlKCZ2b3AtPmZiX3VucmVmX3dvcmssIG9sZF9wbGFuZV9zdGF0ZS0+ ZmIpOwo+ID4gICAJCXNldF9iaXQoVk9QX1BFTkRJTkdfRkJfVU5SRUYsICZ2b3AtPnBlbmRpbmcp Owo+ID4gLQkJV0FSTl9PTihkcm1fY3J0Y192YmxhbmtfZ2V0KGNydGMpICE9IDApOwo+ID4gICAJ fQo+ID4gICB9Cj4gPiAgICAgCj4gCj4gCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fCmRyaS1kZXZlbCBtYWlsaW5nIGxpc3QKZHJpLWRldmVsQGxpc3RzLmZy ZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3Rp bmZvL2RyaS1kZXZlbAo=