From mboxrd@z Thu Jan 1 00:00:00 1970 From: Laurent Pinchart Subject: Re: [PATCH 03/33] HACK: drm/omap: fix memory barrier bug in DMM driver Date: Tue, 23 Feb 2016 23:13:49 +0200 Message-ID: <21417920.F8D2RjGPET@avalon> References: <1455875288-4370-1-git-send-email-tomi.valkeinen@ti.com> <1455875288-4370-4-git-send-email-tomi.valkeinen@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from galahad.ideasonboard.com (galahad.ideasonboard.com [185.26.127.97]) by gabe.freedesktop.org (Postfix) with ESMTPS id 31A7D6E672 for ; Tue, 23 Feb 2016 21:13:53 +0000 (UTC) In-Reply-To: <1455875288-4370-4-git-send-email-tomi.valkeinen@ti.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Tomi Valkeinen Cc: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org SGkgVG9taSwKClRoYW5rIHlvdSBmb3IgdGhlIHBhdGNoLgoKT24gRnJpZGF5IDE5IEZlYnJ1YXJ5 IDIwMTYgMTE6NDc6MzggVG9taSBWYWxrZWluZW4gd3JvdGU6Cj4gQSBETU0gdGltZW91dCAidGlt ZWQgb3V0IHdhaXRpbmcgZm9yIGRvbmUiIGhhcyBiZWVuIG9ic2VydmVkIG9uIERSQTcKPiBkZXZp Y2VzLiBUaGUgdGltZW91dCBoYXBwZW5zIHJhcmVseSwgYW5kIG9ubHkgd2hlbiB0aGUgc3lzdGVt IGlzIHVuZGVyCj4gaGVhdnkgbG9hZC4KPiAKPiBEZWJ1Z2dpbmcgc2hvd2VkIHRoYXQgdGhlIHRp bWVvdXQgY2FuIGJlIG1hZGUgdG8gaGFwcGVuIG11Y2ggbW9yZQo+IGZyZXF1ZW50bHkgYnkgb3B0 aW1pemluZyB0aGUgRE1NIGRyaXZlciwgc28gdGhhdCB0aGVyZSdzIGFsbW9zdCBubyBjb2RlCj4g YmV0d2VlbiB3cml0aW5nIHRoZSBsYXN0IERNTSBkZXNjcmlwdG9ycyB0byBSQU0sIGFuZCB3cml0 aW5nIHRvIERNTQo+IHJlZ2lzdGVyIHdoaWNoIHN0YXJ0cyB0aGUgRE1NIHRyYW5zYWN0aW9uLgo+ IAo+IFRoZSBjdXJyZW50IHRoZW9yeSBpcyB0aGF0IGEgd21iKCkgZG9lcyBub3QgcHJvcGVybHkg ZW5zdXJlIHRoYXQgdGhlCj4gZGF0YSB3cml0dGVuIHRvIFJBTSBpcyBvYnNlcnZhYmxlIGJ5IGFs bCB0aGUgY29tcG9uZW50cyBpbiB0aGUgc3lzdGVtLgo+IAo+IFRoaXMgRE1NIHRpbWVvdXQgaGFz IGNhdXNlZCBpbnRlcmVzdGluZyAoYW5kIHJhcmUpIGJ1Z3MgYXMgdGhlIGVycm9yCj4gaGFuZGxp bmcgd2FzIG5vdCBmdW5jdGlvbmluZyBwcm9wZXJseSAodGhlIGVycm9yIGhhbmRsaW5nIGhhcyBi ZWVuIGZpeGVkCj4gaW4gcHJldmlvdXMgY29tbWl0cyk6Cj4gCj4gICogSWYgYSBETU0gdGltZW91 dCBoYXBwZW5lZCB3aGVuIGEgR0VNIGJ1ZmZlciB3YXMgYmVpbmcgcGlubmVkIGZvcgo+ICAgIGRp c3BsYXkgb24gdGhlIHNjcmVlbiwgYSB0aW1lb3V0IGVycm9yIHdvdWxkIGJlIHNob3duLCBidXQg dGhlIGRyaXZlcgo+ICAgIHdvdWxkIGNvbnRpbnVlIHByb2dyYW1taW5nIERTUyBIVyB3aXRoIGJy b2tlbiBidWZmZXIsIGxlYWRpbmcgdG8KPiAgICBTWU5DTE9TVCBmbG9vZHMgYW5kIHBvc3NpYmxl IGNyYXNoZXMuCj4gCj4gICogSWYgYSBETU0gdGltZW91dCBoYXBwZW5lZCB3aGVuIG90aGVyIHVz ZXIgKHNheSwgdmlkZW8gZGVjb2Rlcikgd2FzCj4gICAgcGlubmluZyBhIEdFTSBidWZmZXIsIGEg dGltZW91dCB3b3VsZCBiZSBzaG93biBidXQgaWYgdGhlIHVzZXIKPiAgICBoYW5kbGVkIHRoZSBl cnJvciBwcm9wZXJseSwgbm8gb3RoZXIgaXNzdWVzIGZvbGxvd2VkLgo+IAo+ICAqIElmIGEgRE1N IHRpbWVvdXQgaGFwcGVuZWQgd2hlbiBhIEdFTSBidWZmZXIgd2FzIGJlaW5nIHJlbGVhc2VkLCB0 aGUKPiAgICBkcml2ZXIgZG9lcyBub3QgZXZlbiBub3RpY2UgdGhlIGVycm9yLCBsZWFkaW5nIHRv IGNyYXNoZXMgb3IgaGFuZwo+ICAgIGxhdGVyLgo+IAo+IFRoaXMgcGF0Y2ggYWRkcyB3bWIoKSBh bmQgcmVhZGwoKSBjYWxscyBhZnRlciB0aGUgbGFzdCBiaXQgaXMgd3JpdHRlbiB0bwo+IFJBTSwg d2hpY2ggc2hvdWxkIGVuc3VyZSB0aGF0IHRoZSBleGVjdXRpb24gcHJvY2VlZHMgb25seSBhZnRl ciB0aGUgZGF0YQo+IGlzIGFjdHVhbGx5IGluIFJBTSwgYW5kIHRodXMgb2JzZXJ2YWJsZSBieSBE TU0uCj4gCj4gVGhpcyBwYXRjaCBpcyBhIEhBQ0ssIGFzIGEgcmVhZC1iYWNrIHNob3VsZCBub3Qg YmUgbmVlZGVkLiBGdXJ0aGVyIHN0dWR5Cj4gaXMgcmVxdWlyZWQgdG8gdW5kZXJzdGFuZCBpZiBE TU0gaXMgc29tZWhvdyBzcGVjaWFsIGNhc2UgYW5kIHJlYWQtYmFjawo+IGlzIG9rLCBvciBpZiBE UkE3J3MgbWVtb3J5IGJhcnJpZXJzIGRvIG5vdCB3b3JrIGNvcnJlY3RseS4KCkNPTkZJR19TT0Nf RFJBN1hYIHNlbGVjdHMgT01BUF9JTlRFUkNPTk5FQ1QgYW5kIE9NQVBfSU5URVJDT05ORUNUX0JB UlJJRVIsIGJ1dCAKZHJhN3h4X21hcF9pbygpIGRvZXNuJ3QgY2FsbCBvbWFwX2JhcnJpZXJzX2lu aXQoKS4gQ291bGQgdGhhdCBiZSB0aGUgcm9vdCAKY2F1c2Ugb2YgdGhlIGlzc3VlID8gSSBkb24n dCBoYXZlIGFjY2VzcyB0byBhIERSQTd4eCBzeXN0ZW0sIHdvdWxkIHlvdSBiZSBhYmxlIAp0byB0 ZXN0IHRoYXQgPwoKPiBTaWduZWQtb2ZmLWJ5OiBUb21pIFZhbGtlaW5lbiA8dG9taS52YWxrZWlu ZW5AdGkuY29tPgo+IC0tLQo+ICBkcml2ZXJzL2dwdS9kcm0vb21hcGRybS9vbWFwX2RtbV90aWxl ci5jIHwgMTEgKysrKysrKysrKysKPiAgMSBmaWxlIGNoYW5nZWQsIDExIGluc2VydGlvbnMoKykK PiAKPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJtL29tYXBkcm0vb21hcF9kbW1fdGlsZXIu Ywo+IGIvZHJpdmVycy9ncHUvZHJtL29tYXBkcm0vb21hcF9kbW1fdGlsZXIuYyBpbmRleCA4MDUy NmRlYzdiMmMuLjRlMDRmOTQ4NzM3NQo+IDEwMDY0NAo+IC0tLSBhL2RyaXZlcnMvZ3B1L2RybS9v bWFwZHJtL29tYXBfZG1tX3RpbGVyLmMKPiArKysgYi9kcml2ZXJzL2dwdS9kcm0vb21hcGRybS9v bWFwX2RtbV90aWxlci5jCj4gQEAgLTI2Miw2ICsyNjIsMTcgQEAgc3RhdGljIGludCBkbW1fdHhu X2NvbW1pdChzdHJ1Y3QgZG1tX3R4biAqdHhuLCBib29sCj4gd2FpdCkgfQo+IAo+ICAJdHhuLT5s YXN0X3BhdC0+bmV4dF9wYSA9IDA7Cj4gKwkvKiBlbnN1cmUgdGhhdCB0aGUgd3JpdHRlbiBkZXNj cmlwdG9ycyBhcmUgdmlzaWJsZSB0byBETU0gKi8KPiArCXdtYigpOwo+ICsKPiArCS8qCj4gKwkg KiBOT1RFOiB0aGUgd21iKCkgYWJvdmUgc2hvdWxkIGJlIGVub3VnaCwgYnV0IHRoZXJlIHNlZW1z IHRvIGJlIGEgYnVnCj4gKwkgKiBpbiBPTUFQJ3MgbWVtb3J5IGJhcnJpZXIgaW1wbGVtZW50YXRp b24sIHdoaWNoIGluIHNvbWUgcmFyZSBjYXNlcyBtYXkKPiArCSAqIGNhdXNlIHRoZSB3cml0ZXMg bm90IHRvIGJlIG9ic2VydmFibGUgYWZ0ZXIgd21iKCkuCj4gKwkgKi8KPiArCj4gKwkvKiByZWFk IGJhY2sgdG8gZW5zdXJlIHRoZSBkYXRhIGlzIGluIFJBTSAqLwo+ICsJcmVhZGwoJnR4bi0+bGFz dF9wYXQtPm5leHRfcGEpOwo+IAo+ICAJLyogd3JpdGUgdG8gUEFUX0RFU0NSIHRvIGNsZWFyIG91 dCBhbnkgcGVuZGluZyB0cmFuc2FjdGlvbiAqLwo+ICAJd3JpdGVsKDB4MCwgZG1tLT5iYXNlICsg cmVnW1BBVF9ERVNDUl1bZW5naW5lLT5pZF0pOwoKLS0gClJlZ2FyZHMsCgpMYXVyZW50IFBpbmNo YXJ0CgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpkcmkt ZGV2ZWwgbWFpbGluZyBsaXN0CmRyaS1kZXZlbEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6 Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9kcmktZGV2ZWwK