From mboxrd@z Thu Jan 1 00:00:00 1970 From: Forest Crossman Subject: Fixing the udl driver: issues and questions Date: Tue, 29 Aug 2017 20:20:41 -0500 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail-io0-x230.google.com (mail-io0-x230.google.com [IPv6:2607:f8b0:4001:c06::230]) by gabe.freedesktop.org (Postfix) with ESMTPS id 43D166E15A for ; Wed, 30 Aug 2017 01:21:03 +0000 (UTC) Received: by mail-io0-x230.google.com with SMTP id d81so752828ioj.4 for ; Tue, 29 Aug 2017 18:21:03 -0700 (PDT) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org SGksIGFsbCwKCkkgcmVjZW50bHkgYm91Z2ggYSBidW5jaCBvZiB1ZGwtY29tcGF0aWJsZSBEaXNw bGF5TGluayBhZGFwdGVycyBhbmQKaGF2ZSBiZWVuIHRyeWluZyB0byB1c2UgdGhlbSBpbiBMaW51 eCwgYnV0IGhhdmUgYmVlbiBydW5uaW5nIGludG8gc29tZQppc3N1ZXM6CgotIE91dHB1dCBpcyBs aW1pdGVkIHRvIDE2LWJpdCBjb2xvciwgYnV0IHRoZSBkZXZpY2UgaXMgY2FwYWJsZSBvZiAyNC1i aXQgY29sb3IuCi0gWCBwcm92aWRlcnMgKG5vdCBzdXJlIGlmIHRoYXQncyB0aGUgcmlnaHQgdGVy bS0taXQncyB0aGUgb3V0cHV0IG9mCmB4cmFuZHIgLS1saXN0cHJvdmlkZXJzYCkgb2Z0ZW4gbGlu Z2VyIHdoZW4gcGx1Z2dpbmcgYW5kIHVucGx1Z2dpbmcKbXVsdGlwbGUgYWRhcHRlcnMuIGUuZy4s IEkgbm9ybWFsbHkgaGF2ZSBvbmUgcHJvdmlkZXIgKG15IG1haW4gR1BVKQp3aXRoIG5vIGFkYXB0 ZXJzIHBsdWdnZWQgaW4sIHRoZW4gSSdsbCBwbHVnIGluIHRocmVlIERpc3BsYXlMaW5rCmFkYXB0 ZXJzIGFuZCB0aGVyZSB3aWxsIGJlIGZvdXIgKG9yIGZpdmUhKSBwcm92aWRlcnMsIGFuZCB0aGVu IEknbGwKdW5wbHVnIG9uZSBhbmQgdGhlcmUgd2lsbCBzdGlsbCBiZSBmb3VyIChvciBmaXZlKSwg YW5kIGlmIEkgcGx1ZyBpdCBpbgphZ2FpbiBpdCdsbCBhZGQgYW5vdGhlciBwcm92aWRlciwgZXRj LgotIFRoZSBkcml2ZXIgb25seSB1c2VzIFJMRSB0byBjb21wcmVzcyBkYXRhLCBidXQgdGhlIGRl dmljZXMgYXJlCmNhcGFibGUgb2YgKGJldHRlcj8pIEh1ZmZtYW4gY29kaW5nLWJhc2VkIGNvbXBy ZXNzaW9uLgotIE5vdCBleGFjdGx5IGEgdWRsIGlzc3VlLCBidXQgdGhlIHVkbGZiIG1vZHVsZSBo YXMgdG8gYmUgYmxhY2tsaXN0ZWQKdG8gZW5hYmxlIHRoZSB1c2Ugb2YgdWRsLgotIFRoZSBlbnRp cmUgZHJpdmVyIGhhbmdzIGlmIHlvdSBwbHVnIGluIHRoZSBhZGFwdGVyIHdoaWxlIHByZXZlbnRp bmcKdGhlIERpc3BsYXlMaW5rIFNvQyBmcm9tIHJlYWRpbmcgdGhlIGFkYXB0ZXIncyBpbnRlcm5h bCBJMkMgRUVQUk9NLgpZZXMsIEkgcmVhbGl6ZSB0aGlzIGhhcHBlbmVkIGJlY2F1c2UgSSB3YXMg bWVzc2luZyBhcm91bmQgd2l0aCB0aGUKZWxlY3Ryb25pY3MgaW5zaWRlIHRoZSBhZGFwdGVyLCBi dXQgYSBVU0IgZGV2aWNlIHNob3VsZCBwcm9iYWJseSBub3QKYmUgcGVybWl0dGVkIHRvIGNhdXNl IGEgZHJpdmVyIHRvIGhhbmcgaW4gdGhlIGZpcnN0IHBsYWNlLgotIE5vdCByZWFsbHkgYSBmdW5j dGlvbmFsIGlzc3VlLCBidXQgdGhlIGRyaXZlciBpcyB2ZXJ5ICJjaGF0dHkiIGluCml0cyBkbWVz ZyBvdXRwdXQsIHByaW50aW5nIGEgYnVuY2ggb2Ygbm9uLWZhdGFsIGVycm9yIG1lc3NhZ2VzIHdo ZW4KdGhpbmdzIGdvIHdyb25nLgotIFdoZW4gdGhpbmdzIGRvIGdvIHdyb25nLCB0aGUgZHJpdmVy IGNyZWF0ZXMgdGhlIFggcHJvdmlkZXIgZXZlbiBpZgp0aGVyZSdzIGEgYnVuY2ggb2YgZXJyb3Jz IGluIHRoZSBrZXJuZWwgbG9nLiBUaGlzIGlzIGp1c3QgbXkgb3BpbmlvbiwKYnV0IEkgdGhpbmsg aWYgYSBwcm9ibGVtIGlzIHNvIGJhZCBpdCBwcmludHMgYW4gZXJyb3IgbWVzc2FnZSwgdGhlCmRl dmljZSBpbml0IHNob3VsZCBmYWlsIGFuZCBub3QgcmVzdWx0IGluIHRoZSBYIHByb3ZpZGVyIGJl aW5nCmNyZWF0ZWQuIElmIGl0J3MgcmVhbGx5IG5vdCB0aGF0IGJhZCwgdGhlbiBpdCBzaG91bGQg cHJvYmFibHkgYmUganVzdAphIHdhcm5pbmcuCi0gVGhlIGRyaXZlciBzZWVtcyB0byBjaGVjayBm b3IgdGhlIEVESUQgb2YgY29ubmVjdGVkIG1vbml0b3JzIG9uIGFsbAphZGFwdGVycyB3aGVuZXZl ciBhIG5ldyBhZGFwdGVyIGlzIGNvbm5lY3RlZCwgcmVnYXJkbGVzcyBvZiB3aGV0aGVyCnRoZXJl IGFyZSBhbnkgbW9uaXRvcnMgY29ubmVjdGVkIHRvIGFueSBvZiB0aG9zZSBhZGFwdGVycywgYW5k IHRoZW4gaXQKb3V0cHV0cyBlcnJvciBtZXNzYWdlcyB3aGVuIGl0IGZhaWxzIHRvIHJlYWQgdGhl IEVESURzIG9mIHRoZQp1bmNvbm5lY3RlZCBtb25pdG9ycy4KLSBUaGUgdmVuZG9yIGRlc2NyaXB0 b3IgaXMgb3V0cHV0IHdpdGggRFJNX0lORk8gd2hlbiBhIG5ldyBkZXZpY2UgaXMKY29ubmVjdGVk LCB3aGljaCBzZWVtcyB1bm5lY2Vzc2FyaWx5IHZlcmJvc2UuCgpTaW5jZSBJIGhhdmVuJ3QgZG9u ZSBhbnkga2VybmVsIGRldiBiZWZvcmUsIEkgdGhvdWdodCB0aGF0IGZpeGluZyBzb21lCm9mIHRo ZXNlIGlzc3VlcyBtaWdodCBiZSBhIGdvb2QgaW50cm9kdWN0aW9uLiBIb3dldmVyLCBJJ20gbm90 CmVudGlyZWx5IHN1cmUgd2hhdCBJJ20gZG9pbmcsIGFuZCB0aGUgY29tbWl0IGhpc3Rvcnkgb2Yg dGhlIGRyaXZlcgpkb2Vzbid0IHNlZW0gdG8gdGVsbCB0aGUgd2hvbGUgc3RvcnkgYXMgdG8gd2h5 IGNlcnRhaW4gZGVzaWduCmRlY2lzaW9ucyB3ZXJlIG1hZGUsIHNvIEkgaGF2ZSBhIGZldyBxdWVz dGlvbnM6CgotIFdoeSBvbmx5IDE2LWJpdCBjb2xvcj8gSSByZWFsaXplIHRoYXQgdGhlIGxvd2Vy IDggYml0cyBuZWVkIHRvIGJlCnN0b3JlZCBhbmQgdHJhbnNmZXJyZWQgaW4gYW5vdGhlciBidWZm ZXIsIGJ1dCBpcyB0aGVyZSBhIHRlY2huaWNhbApyZWFzb24gd2h5IHRoaXMgaXNuJ3QgYWxyZWFk eSBpbXBsZW1lbnRlZD8gT3Igd2FzIHRoZXJlIGp1c3Qgbm90IG11Y2gKaW50ZXJlc3QgaW4gYWRk aW5nIHRoYXQgZnVuY3Rpb25hbGl0eSBhdCB0aGUgdGltZT8KLSBXaHkgaXNuJ3QgdGhlcmUgc3Vw cG9ydCBmb3IgdGhlIEh1ZmZtYW4gY29kaW5nIGNvbXByZXNzaW9uPyBXYXMgaXQKZm9yIHRlY2hu aWNhbCByZWFzb25zLCBlLmcuLCBtb3JlIHRoaW5ncyBuZWVkIHRvIGJlIHJldmVyc2UKZW5naW5l ZXJlZCwgcGVyZm9ybWFuY2UsIGV0Yy4/IE9yIGp1c3QgbGFjayBvZiBpbnRlcmVzdC9kZXZlbG9w ZXIKdGltZT8KLSBXaHkgYXJlIHRoZXJlIHR3byBkcml2ZXJzIGZvciB0aGVzZSBkZXZpY2VzICh1 ZGwgYW5kIHVkbGZiKT8gV291bGQKaXQgYmUgcG9zc2libGUgdG8gbWVyZ2UgYWxsIHRoZSBmdW5j dGlvbmFsaXR5IGludG8gdWRsIHNvIEkgZG9uJ3QgaGF2ZQp0byBibGFja2xpc3QgdWRsZmIgb24g ZXZlcnkgY29tcHV0ZXIgSSB3YW50IHRvIHVzZSB0aGVzZSBhZGFwdGVycwp3aXRoPwotIFdoYXQg cGFydHMgb2YgdGhlIGRyaXZlciBzaG91bGQgSSBiZSBsb29raW5nIGludG8gdG8gZml4IHRoZSBY CnByb3ZpZGVyIGR1cGxpY2F0aW9uIGlzc3VlPwotIFdoeSBpcyB0aGVyZSBzbyBtdWNoIHBvaW50 ZXIgbWF0aD8gKGUuZy4sIGAqY21kKysgPSB2YWw7YCkuIElzIHRoaXMKbm9ybWFsIGZvciBrZXJu ZWwgY29kZT8KLSBXaHkgaXMgdGhlIGRyaXZlciB2ZXJzaW9uIHN0aWxsICIwLjAuMSIgYW5kIHRo ZSBkcml2ZXIgZGF0ZQoiMjAxMjAyMjAiPyBTaG91bGQgdGhlc2UgYmUgdXBkYXRlZD8KCkkgYXBv bG9naXplIGlmIGFueSBvZiB0aGUgcXVlc3Rpb25zIEknbSBhc2tpbmcgc291bmQgc2lsbHktLWFz IEkgc2FpZApiZWZvcmUsIEknbSBuZXcgdG8gdGhpcyBhbmQgSSdtIHN0aWxsIGxlYXJuaW5nIGhv dyBpdCBhbGwgd29ya3MuCgpJIGZpZ3VyZWQgdGhhdCBmaXhpbmcgdGhlIDE2LWJpdC8yNC1iaXQg aXNzdWUgd291bGRuJ3QgYmUgdG9vCmRpZmZpY3VsdCwgc28gSSd2ZSBhbHJlYWR5IGRvbmUgYSBs aXR0bGUgZHJpdmVyIGhhY2tpbmcgYW5kIG1hbmFnZWQgdG8KYWRkIGEgYnVuY2ggb2YgY29kZSB0 byBvdXRwdXQgdGhlIGxvd2VyIDgtYml0cyBvZiBwaXhlbCBkYXRhIHRvIHRoZQpkZXZpY2UuIFVu Zm9ydHVuYXRlbHksIGl0J3MgYWxsIHZlcnkgaGFja3ksIGNyYXNoZXMgcHJldHR5IG9mdGVuLCBh bmQKZG9lc24ndCBhY3R1YWxseSB3b3JrLiBJIGtub3cgaG93IHRvIHVzZSBsaWJ1c2IgcHJldHR5 IHdlbGwsIGJ1dCB0aGUKa2VybmVsIFVTQiBBUEkgaXMgbmV3IHRvIG1lLCBzbyBJJ20gcHJldHR5 IHN1cmUgdGhhdCdzIHdoZXJlIG1vc3Qgb2YKbXkgcHJvYmxlbXMgYXJlIHJpZ2h0IG5vdy4gVGhl biBhZ2FpbiwgSSBhbHNvIGp1c3QgbWlnaHQgbm90IGZ1bGx5CnVuZGVyc3RhbmQgdGhlIGhhcmR3 YXJlIHlldCwgZWl0aGVyLgoKSWYgYW55b25lIGhhcyBhbnkgYW5zd2Vycy9jb21tZW50cy9hZHZp Y2Ugb24gaG93IHRvIGZpeCB0aG9zZSBpc3N1ZXMsCkknZCBsb3ZlIHRvIGhlYXIgdGhlbSEgQWxz bywgaWYgeW91IG5lZWQgbW9yZSBkZXRhaWxlZCBpc3N1ZQpkZXNjcmlwdGlvbnMsIEkgY2FuIGRv IHNvbWUgbW9yZSB0ZXN0aW5nIGFuZCBwcm92aWRlIHRob3NlIGFzIHdlbGwuCgpUaGFua3MhCl9f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmRyaS1kZXZlbCBt YWlsaW5nIGxpc3QKZHJpLWRldmVsQGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3Rz LmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2RyaS1kZXZlbAo=