From mboxrd@z Thu Jan 1 00:00:00 1970 From: Raymond Yau Subject: Re: [RFC PATCH 1/4] ALSA: core: let low-level driver or userspace disable rewinds Date: Tue, 14 Jul 2015 11:32:54 +0800 Message-ID: References: <1436350236-17509-1-git-send-email-pierre-louis.bossart@linux.intel.com> <1436350236-17509-2-git-send-email-pierre-louis.bossart@linux.intel.com> <55A14D23.3070600@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail-ob0-f177.google.com (mail-ob0-f177.google.com [209.85.214.177]) by alsa0.perex.cz (Postfix) with ESMTP id CBEFB264F45 for ; Tue, 14 Jul 2015 05:32:55 +0200 (CEST) Received: by obre1 with SMTP id e1so13668590obr.1 for ; Mon, 13 Jul 2015 20:32:55 -0700 (PDT) In-Reply-To: <55A14D23.3070600@gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: "Alexander E. Patrakov" Cc: Takashi Iwai , ALSA Development Mailing List , Pierre-Louis Bossart List-Id: alsa-devel@alsa-project.org IEFkZCBuZXcgaHdfcGFyYW1zIGZsYWcgdG8gZXhwbGljaXRseSB0ZWxsIGRyaXZlciB0aGF0IHJl d2luZHMKPj4gd2lsbCBuZXZlciBiZSB1c2VkLiBUaGlzIGNhbiBiZSB1c2VkIGJ5IGxvdy1sZXZl bCBkcml2ZXIgdG8KPj4gb3B0aW1pemUgRE1BIG9wZXJhdGlvbnMgYW5kIHJlZHVjZSBwb3dlciBj b25zdW1wdGlvbi4KPj4gVXNlIHRoaXMgZmxhZyBvbmx5IHdoZW4gZGF0YSB3cml0dGVuIGluIHJp bmcgYnVmZmVyIHdpbGwKPj4gbmV2ZXIgYmUgaW52YWxpZGF0ZWQsIGUuZy4gYW55IHVwZGF0ZSBv ZiBhcHBsX3B0ciBpcyBmaW5hbC4KPj4KPj4gQ2F2ZWF0OiB0aGVyZSBpcyBjdXJyZW50bHkgbm8g d2F5IHRvIHF1ZXJ5IGNhcGFiaWxpdGllcyB3aXRob3V0Cj4+IG9wZW5pbmcgYSBwY20gc3RyZWFt LCBzbyBhcHBsaWNhdGlvbnMgbWlnaHQgbmVlZCB0byBzZXJpYWxseQo+PiBvcGVuIGFsbCBleHBv c2VkIGRldmljZXMsIGNoZWNrIHdoYXQgdGhleSBzdXBwb3J0IGJ5IGxvb2tpbmcgYXQKPj4gaHdf cGFyYW1zLT5pbmZvIGFuZCBjbG9zZSB0aGVtICh0aGlzIGlzIHdoYXQgUHVsc2VBdWRpbyBkb2Vz IHNvCj4+IG1pZ2h0IG5vdCBiZSBhbiBpc3N1ZSkKPj4KPgo+IEhvdyBhYm91dCBzcGRpZi0+c3Rh dHVzIEFFUzBfTk9OQVVESU8gaXMgc2V0IHdoZW4gQUMzIHBhc3N0aHJvdWdoIFNQRElGID8KCgo+ Cj4gMS4gV2hhdCBhbW91bnQgb2YgcG93ZXItc2F2aW5nIGFyZSB3ZSB0YWxraW5nIGFib3V0LCBm b3IgSW50ZWwgY2hpcHM/Cj4gKGlkZWFsbHksIHRoaXMgc2hvdWxkIGJlIGluIHRoZSBjb21taXQg bWVzc2FnZSkKPgoKUmVmZXIgdG8gSERBMDQzLUEKCkVuZXJneSBlZmZpY2llbnQgYXVkaW8gYnVm ZmVyaW5nIGFuZCBkeW5hbWljIEZJRk8gbGltaXQgY2hhbmdlCgozLjMuMTEgT2Zmc2V0IDEyaDog R0NBUDIg4oCTR2xvYmFsIENhcGFiaWxpdGllcyAyCgpGSUZPIFNpemUgQ2hhbmdlIChGSUZPU0Mp IFRoaXMgYml0IGlzUk8KCmlmIEdDQVAyLkVFQUMgPSAwLgoKSW4gc3RhdGljIGNhc2UgKEdDQVAy LkVFQUMgPSAxIGFuZCBHQ0FQMi5ERkZMQ0MgPSAwKSwgdGhpcyBiaXQgd2lsbCBvbmx5CmhhdmUg ZWZmZWN0IGJlZm9yZSB0aGUgZmlyc3QgdGltZSBSVU4gYml0IGlzIHNldC4gU29mdHdhcmUgbXVz dCBub3QgYXR0ZW1wdAp0byB3cml0ZSB0aGlzIGJpdCwgdW5sZXNzIEVFQ0FQLkVFQUMgYml0IGlz IHNldC4gSFcgd2lsbCB0cmVhdCB0aGlzIGJpdCBhcwpyZWFkIC1vbmx5IGlmIHRoZSBjYXBhYmls aXR5IGlzIG5vdCBzdXBwb3J0ZWQKLgpJbiBkeW5hbWljIGNhc2UgKEdDQVAyLkVFQUMgPSAxIGFu ZCBHQ0FQMi5ERkZMQ0MgPSAxKSwgb24gdG9wIG9mIHN1cHBvcnRpbmcKdGhlIHN0YXRpYyBiZWhh dmlvciBkZXNjcmliZSBhYm92ZSwgdGhpcyBiaXQgY2FuIGFsc28gYmUgdXNlZCB0bwpjb21tdW5p Y2F0ZSB0aGUgZHluYW1pYyBjaGFuZ2UgcmVxdWVzdCBpbiBGSUZPIHNpemUgYmV0d2VlbiBTVyBh bmQgSFcgd2hlbgp0aGUgc3RyZWFtIGlzIGFjdGl2ZQoKCjMuMy40MSBPZmZzZXQgOTA6IHtJT0J9 U0RuRklGT1Mg4oCTIElucHV0L091dHB1dC9CaWRpcmVjdGlvbmFsIFN0cmVhbQpEZXNjcmlwdG9y IG4gRklGTyBTaXplCgpXaGVuIEhXIHN1cHBvcnRzIEVFIEF1ZGlvIGNhcGFiaWxpdHksdGhlIEZJ Rk9TIHRoaXMgdmFsdWUgd2lsbCByZXByZXNlbnQKdGhlIG1pbmltdW0gc2l6ZSBvZiBjeWNsaWMg YnVmZmVyIGZvciBlZmZpY2llbnQgSFcgb3BlcmF0aW9uCgoKRG8gYXBwbGljYXRpb24gbmVlZCB0 byBrbm93IGRyaXZlciBpcyB1c2luZyBzdGF0aWMgb3IgZHluYW1pYyBjYXNlID8KCmlzIHRoZSBt aW5pbXVtIHNpemUgb2YgY3ljbGljIGJ1ZmZlciBmb3IgZWZmaWNpZW50IEhXIG9wZXJhdGlvbiBs YXJnZXIgdGhhbgpjdXJyZW50IGh3IHBhcmFtcyAocGVyaW9kX2J5dGVzX21pbiAqIHBlcmlvZHNf bWluKSA/CgoKCj4gMi4gU2hvdWxkbid0IFNORF9QQ01fQVBQRU5EICh0aGUgbW9kZSB1c2VkIGJ5 IGRtaXggYW5kIGZyaWVuZHMpIGJlIGFsc28KPiBtYWRlIGluY29tcGF0aWJsZSB3aXRoIHRoaXMg ZmxhZywgYmVjYXVzZSwgd2hlbiBtaXhpbmcsIGl0IGVzc2VudGlhbGx5Cj4gb3ZlcndyaXRlcyBp bmNvbXBsZXRlbHktbWl4ZWQgZGF0YSwgaS5lLiByZXdpbmRzIHdpdGhvdXQgc2F5aW5nIHRoZSB3 b3JkCj4gInJld2luZCI/IFNob3VsZG4ndCBhbGwgb3RoZXIga2luZHMgb2YgZnJlZXdoZWVsaW5n IGJlIG1hZGUgaW5jb21wYXRpYmxlCj4gd2l0aCB0aGlzIGZsYWcsIGJlY2F1c2UgdGhlIGNhcmQs IGVzc2VudGlhbGx5LCBpcyBuZXZlciB0b2xkIGFib3V0IHRoZQo+IGFwcGxpY2F0aW9uIHBvaW50 ZXI/IE9yIGlzIHRoaXMgYSB1c2Vyc3BhY2Utb25seSBjb25jZXJuPwo+CgppZiBTTkRfUENNX0FQ UEVORCB1c2UgZm1vZGUgPSBPX0FQUEVORCB3aGVuIHNuZF9kZXZpY2Vfb3BlbigpLCB0aGlzIHNl ZW0Kc3VwcG9ydCBzZXF1ZW50aWFsIHdyaXRlIG9ubHkgYW5kIG5vIHJhbmRvbSB3cml0ZQoKRG8g aXQgbWVhbiBwdWxzZWF1ZGlvIGNhbm5vdCByZXdpbmQgZG1peCBhcyBkbWl4IGFsd2F5IGFwcGVu ZCBkYXRhIHRvIGh3CmRldmljZSA/CgoKPgo+IDMuIEkgaGF2ZSBub3Qgc2VlbiBhbnkganVzdGlm aWNhdGlvbiBmb3IgdGhlIGRyYXN0aWMgbWVhc3VyZSBvZiBtYWtpbmcgYQo+IERNQS1iYXNlZCBk ZXZpY2UgY29tcGxldGVseSB1bnJld2luZGFibGUuIE1heWJlIGEgbW9yZSBwb2xpdGUgInBsZWFz ZSBtYWtlCj4gdGhpcyBhIGJhdGNoL2Jsb2NrdHJhbnNmZXIgY2FyZCIgcmVxdWVzdCwgdGh1cyBk aXNhbGxvd2luZyBvbmx5IHN1Yi1wZXJpb2QKPiByZXdpbmRzLCB3b3VsZCBzdGlsbCBiZSB1c2Vm dWwgZm9yIHBvd2Vyc2F2aW5nLCB3aXRob3V0IGtpbGxpbmcgZG1peC4KPgoKQ2FuIHRob3NlIG5v bi1pbnRlcmxlYXZlZCBhY2Nlc3MgcGNtIGRldmljZSB3aXRoIHR3byBwZXJpb2RzIHN1cHBvcnQg cmV3aW5kCj8KX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18K QWxzYS1kZXZlbCBtYWlsaW5nIGxpc3QKQWxzYS1kZXZlbEBhbHNhLXByb2plY3Qub3JnCmh0dHA6 Ly9tYWlsbWFuLmFsc2EtcHJvamVjdC5vcmcvbWFpbG1hbi9saXN0aW5mby9hbHNhLWRldmVsCg==