From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anssi Hannula Subject: Re: [alsa-devel] [PATCH 12/13] drm: bridge/dw_hdmi-ahb-audio: add audio driver Date: Sat, 09 May 2015 20:07:45 +0300 Message-ID: <554E3EE1.40904@iki.fi> References: <20150509102501.GO2067@n2100.arm.linux.org.uk> <554E3AA8.8060601@iki.fi> <20150509165536.GS2067@n2100.arm.linux.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <20150509165536.GS2067@n2100.arm.linux.org.uk> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Russell King - ARM Linux Cc: Fabio Estevam , alsa-devel@alsa-project.org, dri-devel@lists.freedesktop.org, Mark Brown , Yakir Yang , linux-arm-kernel@lists.infradead.org List-Id: alsa-devel@alsa-project.org MDkuMDUuMjAxNSwgMTk6NTUsIFJ1c3NlbGwgS2luZyAtIEFSTSBMaW51eCBraXJqb2l0dGk6Cj4g T24gU2F0LCBNYXkgMDksIDIwMTUgYXQgMDc6NDk6NDRQTSArMDMwMCwgQW5zc2kgSGFubnVsYSB3 cm90ZToKPj4gKE9mIGNvdXJzZSBoYXZpbmcgdXNlcnNwYWNlIHNldCB0aGVtIHJlcXVpcmVzIHRo YXQgdGhlIGRldmljZSBoYXMgYQo+PiBwcm9wZXIgZW50cnkgaW4gL3Vzci9zaGFyZS9hbHNhL2Nh cmRzIGFuZCB0aGUgcGNtIGRldmljZSBpcyBhY2Nlc3NlZCB2aWEKPj4gdGhlIHN0YW5kYXJkICJo ZG1pIiBvciAiaWVjOTU4IiBkZXZpY2UgbmFtZXMgd2hpY2ggcGVyZm9ybSB0aGUgY2hhbm5lbAo+ PiBzdGF0dXMgd29yZCBzZXR1cC4gSSBndWVzcyB0aGUgQVJNIFNvQyBzdHVmZiBnZW5lcmFsbHkg ZG9lc24ndCBib3RoZXIKPj4gd2l0aCB0aGF0LCBleHBsYWluaW5nIGEgYml0IHdoeSBzb21lIGtl cm5lbCBkcml2ZXJzIHNldCB0aGVtIGJ5IHRoZW1zZWx2ZXMpLgo+IAo+IEknbSBub3Qgc3VyZSB0 aGF0J3Mgc3VmZmljaWVudCAtIEkgaGF2ZW4ndCB5ZXQgZm91bmQgd2hlcmUgaW4gdGhlIEFMU0EK PiB1c2Vyc3BhY2UsIHRoZSBBRVMgYml0cyBhcmUgYXBwcm9wcmlhdGVseSBzZXQgYWNjb3JkaW5n IHRvIHRoZSBzYW1wbGUKPiByYXRlLgoKUmlnaHQsIHRoYXQgaXMgbGVmdCB0byB0aGUgYXBwbGlj YXRpb25zIChlLmcuIFZMQyBhbmQgS29kaSBkbyB0aGF0KS4gSSdtCnVuZGVyIHRoZSBpbXByZXNz aW9uIHRoYXQgc2lua3MgZG8gbm90IG5vcm1hbGx5IGNhcmUgYWJvdXQgdGhpcyB2YWx1ZSwKdGhv dWdoLCBidXQgdGhhdCBjb3VsZCBqdXN0IGJlIGJlY2F1c2UgbW9zdCBkZXNrdG9wIEhXIHNldHMg aXQgYnkKdGhlbXNlbHZlcy4KCkJ1dCBpbmRlZWQsIHRoYXQgaXMgb25lIHJlYXNvbiB0byBoYXZl IHRoZSBrZXJuZWwgc2V0IGl0LgoKLS0gCkFuc3NpIEhhbm51bGEKX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX18KZHJpLWRldmVsIG1haWxpbmcgbGlzdApkcmkt ZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHA6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcv bWFpbG1hbi9saXN0aW5mby9kcmktZGV2ZWwK From mboxrd@z Thu Jan 1 00:00:00 1970 From: anssi.hannula@iki.fi (Anssi Hannula) Date: Sat, 09 May 2015 20:07:45 +0300 Subject: [alsa-devel] [PATCH 12/13] drm: bridge/dw_hdmi-ahb-audio: add audio driver In-Reply-To: <20150509165536.GS2067@n2100.arm.linux.org.uk> References: <20150509102501.GO2067@n2100.arm.linux.org.uk> <554E3AA8.8060601@iki.fi> <20150509165536.GS2067@n2100.arm.linux.org.uk> Message-ID: <554E3EE1.40904@iki.fi> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 09.05.2015, 19:55, Russell King - ARM Linux kirjoitti: > On Sat, May 09, 2015 at 07:49:44PM +0300, Anssi Hannula wrote: >> (Of course having userspace set them requires that the device has a >> proper entry in /usr/share/alsa/cards and the pcm device is accessed via >> the standard "hdmi" or "iec958" device names which perform the channel >> status word setup. I guess the ARM SoC stuff generally doesn't bother >> with that, explaining a bit why some kernel drivers set them by themselves). > > I'm not sure that's sufficient - I haven't yet found where in the ALSA > userspace, the AES bits are appropriately set according to the sample > rate. Right, that is left to the applications (e.g. VLC and Kodi do that). I'm under the impression that sinks do not normally care about this value, though, but that could just be because most desktop HW sets it by themselves. But indeed, that is one reason to have the kernel set it. -- Anssi Hannula