From: Anssi Hannula <anssi.hannula@iki.fi>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Fabio Estevam <fabio.estevam@freescale.com>,
alsa-devel@alsa-project.org, dri-devel@lists.freedesktop.org,
Mark Brown <broonie@kernel.org>, Yakir Yang <ykk@rock-chips.com>,
linux-arm-kernel@lists.infradead.org
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 [thread overview]
Message-ID: <554E3EE1.40904@iki.fi> (raw)
In-Reply-To: <20150509165536.GS2067@n2100.arm.linux.org.uk>
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
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WARNING: multiple messages have this Message-ID (diff)
From: anssi.hannula@iki.fi (Anssi Hannula)
To: linux-arm-kernel@lists.infradead.org
Subject: [alsa-devel] [PATCH 12/13] drm: bridge/dw_hdmi-ahb-audio: add audio driver
Date: Sat, 09 May 2015 20:07:45 +0300 [thread overview]
Message-ID: <554E3EE1.40904@iki.fi> (raw)
In-Reply-To: <20150509165536.GS2067@n2100.arm.linux.org.uk>
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
next prev parent reply other threads:[~2015-05-09 17:07 UTC|newest]
Thread overview: 148+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-02 9:20 [RFC v2 0/13] dw_hdmi cleanups, audio preparation, helpers and ahb audio support Russell King - ARM Linux
2015-04-02 9:20 ` Russell King - ARM Linux
2015-04-02 9:21 ` [PATCH RFC v2 01/13] drm: imx/dw_hdmi: move phy comments Russell King
2015-04-02 9:21 ` Russell King
2015-04-02 9:21 ` [PATCH RFC v2 02/13] drm: bridge/dw_hdmi: clean up phy configuration Russell King
2015-04-02 9:21 ` Russell King
2015-04-02 9:21 ` [PATCH RFC v2 03/13] drm: bridge/dw_hdmi: clean up hdmi_set_clk_regenerator() Russell King
2015-04-02 9:21 ` Russell King
2015-04-02 9:21 ` [PATCH RFC v2 04/13] drm: bridge/dw_hdmi: use drm_hdmi_avi_infoframe_from_display_mode() Russell King
2015-04-02 9:21 ` Russell King
2015-04-02 9:21 ` [PATCH RFC v2 05/13] drm: bridge/dw_hdmi: simplify hdmi_config_AVI() a little Russell King
2015-04-02 9:21 ` Russell King
2015-04-02 9:21 ` [PATCH RFC v2 06/13] drm: bridge/dw_hdmi: remove mhsyncpolarity/mvsyncpolarity/minterlaced Russell King
2015-04-02 9:21 ` Russell King
2015-04-02 9:21 ` [PATCH RFC v2 07/13] drm: bridge/dw_hdmi: introduce interface to setting sample rate Russell King
2015-04-02 9:21 ` Russell King
2015-04-02 9:21 ` [PATCH RFC v2 08/13] drm: bridge/dw_hdmi: introduce interfaces to enable and disable audio Russell King
2015-04-02 9:21 ` Russell King
2015-04-02 9:22 ` [PATCH RFC v2 09/13] drm/edid: add function to help find SADs Russell King
2015-04-02 9:22 ` Russell King
2015-04-02 9:22 ` [PATCH RFC v2 10/13] sound/core: add DRM ELD helper Russell King
2015-04-02 9:22 ` Russell King
2015-04-05 15:57 ` Takashi Iwai
2015-04-05 15:57 ` Takashi Iwai
2015-04-05 16:20 ` Russell King - ARM Linux
2015-04-05 16:20 ` Russell King - ARM Linux
2015-04-05 16:46 ` Takashi Iwai
2015-04-05 16:46 ` Takashi Iwai
2015-04-05 17:26 ` Russell King - ARM Linux
2015-04-05 17:26 ` Russell King - ARM Linux
2015-05-06 17:02 ` Anssi Hannula
2015-05-06 17:02 ` Anssi Hannula
2015-05-07 10:41 ` Russell King - ARM Linux
2015-05-07 10:41 ` Russell King - ARM Linux
2015-05-07 11:11 ` Lars-Peter Clausen
2015-05-07 11:11 ` [alsa-devel] " Lars-Peter Clausen
2015-05-08 10:56 ` Jyri Sarha
2015-05-08 10:56 ` Jyri Sarha
2015-05-08 11:42 ` Russell King - ARM Linux
2015-05-08 11:42 ` Russell King - ARM Linux
2015-05-05 22:35 ` Mark Brown
2015-05-05 22:35 ` Mark Brown
2015-05-06 8:58 ` Liam Girdwood
2015-05-06 8:58 ` [alsa-devel] " Liam Girdwood
2015-05-08 13:16 ` Jyri Sarha
2015-05-08 13:16 ` Jyri Sarha
2015-05-08 13:27 ` Russell King - ARM Linux
2015-05-08 13:27 ` Russell King - ARM Linux
2015-05-08 13:37 ` Jyri Sarha
2015-05-08 13:37 ` [alsa-devel] " Jyri Sarha
2015-04-02 9:22 ` [PATCH RFC v2 11/13] sound/core: add IEC958 channel status helper Russell King
2015-04-02 9:22 ` Russell King
2015-04-02 9:22 ` [PATCH RFC v2 12/13] drm: bridge/dw_hdmi-ahb-audio: add audio driver Russell King
2015-04-02 9:22 ` Russell King
2015-04-02 9:22 ` [PATCH RFC v2 13/13] drm: bridge/dw_hdmi-ahb-audio: parse ELD from HDMI driver Russell King
2015-04-02 9:22 ` Russell King
2015-05-09 10:25 ` [PATCH v3 0/13] dw_hdmi cleanups, audio preparation, helpers and ahb audio support Russell King - ARM Linux
2015-05-09 10:25 ` Russell King - ARM Linux
2015-05-09 10:25 ` [PATCH 01/13] drm: imx/dw_hdmi: move phy comments Russell King
2015-05-09 10:25 ` Russell King
2015-05-09 10:26 ` [PATCH 02/13] drm: bridge/dw_hdmi: clean up phy configuration Russell King
2015-05-09 10:26 ` Russell King
2015-05-22 15:19 ` Yakir
2015-05-22 15:19 ` Yakir
2015-05-09 10:26 ` [PATCH 03/13] drm: bridge/dw_hdmi: clean up hdmi_set_clk_regenerator() Russell King
2015-05-09 10:26 ` Russell King
2015-05-22 15:22 ` Yakir
2015-05-22 15:22 ` Yakir
2015-05-09 10:26 ` [PATCH 04/13] drm: bridge/dw_hdmi: use drm_hdmi_avi_infoframe_from_display_mode() Russell King
2015-05-09 10:26 ` Russell King
2015-05-09 10:26 ` [PATCH 05/13] drm: bridge/dw_hdmi: simplify hdmi_config_AVI() a little Russell King
2015-05-09 10:26 ` Russell King
2015-05-09 10:26 ` [PATCH 06/13] drm: bridge/dw_hdmi: remove mhsyncpolarity/mvsyncpolarity/minterlaced Russell King
2015-05-09 10:26 ` Russell King
2015-05-09 10:26 ` [PATCH 07/13] drm: bridge/dw_hdmi: introduce interface to setting sample rate Russell King
2015-05-09 10:26 ` Russell King
2015-05-22 15:26 ` Yakir
2015-05-22 15:26 ` Yakir
2015-05-09 10:26 ` [PATCH 08/13] drm: bridge/dw_hdmi: introduce interfaces to enable and disable audio Russell King
2015-05-09 10:26 ` Russell King
2015-05-22 15:28 ` Yakir
2015-05-22 15:28 ` Yakir
2015-05-09 10:26 ` [PATCH 09/13] drm/edid: add function to help find SADs Russell King
2015-05-09 10:26 ` Russell King
2015-05-09 10:26 ` [PATCH 10/13] sound/core: add DRM ELD helper Russell King
2015-05-09 10:26 ` Russell King
2015-05-22 12:20 ` [alsa-devel] " Mark Brown
2015-05-22 12:20 ` Mark Brown
2015-05-22 13:15 ` Russell King - ARM Linux
2015-05-22 13:15 ` Russell King - ARM Linux
2015-05-22 13:30 ` Takashi Iwai
2015-05-22 13:30 ` Takashi Iwai
2015-05-22 13:53 ` Russell King - ARM Linux
2015-05-22 13:53 ` Russell King - ARM Linux
2015-05-22 13:54 ` Takashi Iwai
2015-05-22 13:54 ` Takashi Iwai
2015-05-22 14:00 ` Russell King - ARM Linux
2015-05-22 14:00 ` Russell King - ARM Linux
2015-05-22 14:02 ` Takashi Iwai
2015-05-22 14:02 ` Takashi Iwai
2015-05-22 14:05 ` Takashi Iwai
2015-05-22 14:05 ` Takashi Iwai
2015-05-22 16:12 ` Russell King - ARM Linux
2015-05-22 16:12 ` Russell King - ARM Linux
2015-05-09 10:26 ` [PATCH 11/13] sound/core: add IEC958 channel status helper Russell King
2015-05-09 10:26 ` Russell King
2015-05-22 12:40 ` Mark Brown
2015-05-22 12:40 ` Mark Brown
2015-05-09 10:26 ` [PATCH 12/13] drm: bridge/dw_hdmi-ahb-audio: add audio driver Russell King
2015-05-09 10:26 ` Russell King
2015-05-09 16:49 ` [alsa-devel] " Anssi Hannula
2015-05-09 16:49 ` Anssi Hannula
2015-05-09 16:55 ` Russell King - ARM Linux
2015-05-09 16:55 ` Russell King - ARM Linux
2015-05-09 17:07 ` Anssi Hannula [this message]
2015-05-09 17:07 ` Anssi Hannula
2015-05-09 17:40 ` Russell King - ARM Linux
2015-05-09 17:40 ` Russell King - ARM Linux
2015-05-09 17:53 ` Russell King - ARM Linux
2015-05-09 17:53 ` Russell King - ARM Linux
2015-05-09 17:55 ` Anssi Hannula
2015-05-09 17:55 ` Anssi Hannula
2015-05-09 18:11 ` Russell King - ARM Linux
2015-05-09 18:11 ` Russell King - ARM Linux
2015-05-10 18:59 ` Anssi Hannula
2015-05-10 18:59 ` Anssi Hannula
2015-05-10 19:33 ` Russell King - ARM Linux
2015-05-10 19:33 ` Russell King - ARM Linux
2015-05-10 20:47 ` Anssi Hannula
2015-05-10 20:47 ` Anssi Hannula
2015-05-11 15:58 ` Mark Brown
2015-05-11 15:58 ` [alsa-devel] " Mark Brown
2015-05-09 10:26 ` [PATCH 13/13] drm: bridge/dw_hdmi-ahb-audio: parse ELD from HDMI driver Russell King
2015-05-09 10:26 ` Russell King
2015-05-27 10:43 ` Daniel Vetter
2015-05-27 10:43 ` Daniel Vetter
2015-05-27 11:43 ` Mark Brown
2015-05-27 11:43 ` Mark Brown
2015-05-27 17:31 ` Russell King - ARM Linux
2015-05-27 17:31 ` Russell King - ARM Linux
2015-05-27 21:29 ` Daniel Vetter
2015-05-27 21:29 ` Daniel Vetter
2015-05-27 21:44 ` Russell King - ARM Linux
2015-05-27 21:44 ` Russell King - ARM Linux
2015-05-28 6:43 ` Daniel Vetter
2015-05-28 6:43 ` Daniel Vetter
2015-05-28 4:56 ` [alsa-devel] " Takashi Iwai
2015-05-28 4:56 ` Takashi Iwai
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