From: Mark Brown <broonie@kernel.org> To: Russell King - ARM Linux <linux@arm.linux.org.uk> Cc: Takashi Iwai <tiwai@suse.de>, linux-rockchip@lists.infradead.org, alsa-devel@alsa-project.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Philipp Zabel <p.zabel@pengutronix.de>, Andy Yan <andy.yan@rock-chips.com>, Yakir Yang <ykk@rock-chips.com>, Fabio Estevam <fabio.estevam@freescale.com>, Jaroslav Kysela <perex@perex.cz>, Sascha Hauer <s.hauer@pengutronix.de>, Jon Nettleton <jon.nettleton@gmail.com>, David Airlie <airlied@linux.ie> Subject: Re: [PATCH 1/9] drm: bridge/dw_hdmi-ahb-audio: add audio driver Date: Mon, 10 Aug 2015 19:16:41 +0100 [thread overview] Message-ID: <20150810181641.GD10748@sirena.org.uk> (raw) In-Reply-To: <20150810164941.GW7557@n2100.arm.linux.org.uk> [-- Attachment #1: Type: text/plain, Size: 939 bytes --] On Mon, Aug 10, 2015 at 05:49:41PM +0100, Russell King - ARM Linux wrote: > I'm not sure what the right solution is here: modifying every audio > player out there to make HDMI work sanely is crazy. Having alsalib > automatically generate the correct AES channel status bytes for > linear audio formats seems to be sensible, but difficult given its > present structure with the defaults - the iec958 plugin has no idea > if the defaults are being used or not. > The advantage of having the horrid conversion in the kernel is that > we can choose to generate proper AES channel status data without > regard to userspace for standard linear PCM, and when the iec958 plugin > is being used with proper channel status (eg, in compressed audio > pass-through mode by VLC) then that works too. The other advantage of doing it in kernel is that it also fixes tinyalsa applications (which mainly means Android systems) by default for PCM data. [-- Attachment #2: Digital signature --] [-- Type: application/pgp-signature, Size: 473 bytes --]
WARNING: multiple messages have this Message-ID (diff)
From: broonie@kernel.org (Mark Brown) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 1/9] drm: bridge/dw_hdmi-ahb-audio: add audio driver Date: Mon, 10 Aug 2015 19:16:41 +0100 [thread overview] Message-ID: <20150810181641.GD10748@sirena.org.uk> (raw) In-Reply-To: <20150810164941.GW7557@n2100.arm.linux.org.uk> On Mon, Aug 10, 2015 at 05:49:41PM +0100, Russell King - ARM Linux wrote: > I'm not sure what the right solution is here: modifying every audio > player out there to make HDMI work sanely is crazy. Having alsalib > automatically generate the correct AES channel status bytes for > linear audio formats seems to be sensible, but difficult given its > present structure with the defaults - the iec958 plugin has no idea > if the defaults are being used or not. > The advantage of having the horrid conversion in the kernel is that > we can choose to generate proper AES channel status data without > regard to userspace for standard linear PCM, and when the iec958 plugin > is being used with proper channel status (eg, in compressed audio > pass-through mode by VLC) then that works too. The other advantage of doing it in kernel is that it also fixes tinyalsa applications (which mainly means Android systems) by default for PCM data. -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 473 bytes Desc: Digital signature URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20150810/8d801c69/attachment.sig>
next prev parent reply other threads:[~2015-08-10 18:17 UTC|newest] Thread overview: 226+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-08-08 16:02 [PATCH 00/12] dw-hdmi development Russell King - ARM Linux 2015-08-08 16:02 ` Russell King - ARM Linux 2015-08-08 16:02 ` Russell King - ARM Linux 2015-08-08 16:03 ` [PATCH 01/12] drm: bridge/dw_hdmi: remove pixel repetition setting for all VICs Russell King 2015-08-08 16:03 ` Russell King 2015-08-08 16:03 ` [PATCH 02/12] drm: bridge/dw_hdmi: don't support any pixel doubled modes Russell King 2015-08-08 16:03 ` Russell King 2015-08-08 16:03 ` [PATCH 03/12] gpu: imx: simplify sync polarity setting Russell King 2015-08-08 16:03 ` Russell King 2015-10-06 17:57 ` Fabio Estevam 2015-10-06 17:57 ` Fabio Estevam 2015-10-06 17:57 ` Fabio Estevam 2015-08-08 16:03 ` [PATCH 04/12] gpu: imx: fix support for interlaced modes Russell King 2015-08-08 16:03 ` Russell King 2015-08-27 8:39 ` Philipp Zabel 2015-08-27 8:39 ` Philipp Zabel 2015-08-27 8:39 ` Philipp Zabel 2015-08-27 8:54 ` Russell King - ARM Linux 2015-08-27 8:54 ` Russell King - ARM Linux 2015-08-27 8:54 ` Russell King - ARM Linux 2015-08-27 9:40 ` Philipp Zabel 2015-08-27 9:40 ` Philipp Zabel 2015-08-27 9:40 ` Philipp Zabel 2015-10-06 17:59 ` Fabio Estevam 2015-10-06 17:59 ` Fabio Estevam 2015-10-06 17:59 ` Fabio Estevam 2015-08-08 16:03 ` [PATCH 05/12] drm: bridge/dw_hdmi: add support for interlaced video modes Russell King 2015-08-08 16:03 ` Russell King 2015-08-08 16:03 ` Russell King 2015-10-06 18:00 ` Fabio Estevam 2015-10-06 18:00 ` Fabio Estevam 2015-10-06 18:00 ` Fabio Estevam 2015-08-08 16:03 ` [PATCH 06/12] drm: bridge/dw_hdmi: clean up HDMI vs DVI mode handling Russell King 2015-08-08 16:03 ` Russell King 2015-10-07 3:40 ` Yakir Yang 2015-10-07 3:40 ` Yakir Yang 2015-10-07 3:40 ` Yakir Yang 2015-08-08 16:03 ` [PATCH 07/12] drm: bridge/dw_hdmi: enable audio only if sink supports audio Russell King 2015-08-08 16:03 ` Russell King 2015-10-07 3:42 ` Yakir Yang 2015-10-07 3:42 ` Yakir Yang 2015-10-07 3:42 ` Yakir Yang 2015-08-08 16:04 ` [PATCH 08/12] drm: bridge/dw_hdmi: avoid enabling interface in mode_set Russell King 2015-08-08 16:04 ` Russell King 2015-10-07 3:50 ` Yakir Yang 2015-10-07 3:50 ` Yakir Yang 2015-10-07 9:18 ` Russell King - ARM Linux 2015-10-07 9:18 ` Russell King - ARM Linux 2015-10-07 9:18 ` Russell King - ARM Linux 2015-10-07 9:35 ` Yakir Yang 2015-10-07 9:35 ` Yakir Yang 2015-10-07 9:35 ` Yakir Yang 2015-08-08 16:04 ` [PATCH 09/12] drm: bridge/dw_hdmi: rename dw_hdmi_phy_enable_power() Russell King 2015-08-08 16:04 ` Russell King 2015-08-08 16:04 ` Russell King 2015-10-07 4:00 ` Yakir Yang 2015-08-08 16:04 ` [PATCH 10/12] drm: bridge/dw_hdmi: fix phy enable/disable handling Russell King 2015-08-08 16:04 ` Russell King 2015-08-08 16:04 ` Russell King 2015-10-07 4:05 ` Yakir Yang 2015-10-07 9:48 ` Russell King - ARM Linux 2015-10-07 9:48 ` Russell King - ARM Linux 2015-10-07 9:48 ` Russell King - ARM Linux 2015-10-07 10:40 ` Yakir Yang 2015-10-07 19:17 ` Russell King - ARM Linux 2015-10-07 19:17 ` Russell King - ARM Linux 2015-10-07 19:17 ` Russell King - ARM Linux 2015-10-08 8:35 ` Yakir Yang 2015-10-08 8:35 ` Yakir Yang 2015-10-08 8:35 ` Yakir Yang 2015-08-08 16:04 ` [PATCH 11/12] drm: bridge/dw_hdmi: add connector mode forcing Russell King 2015-08-08 16:04 ` Russell King 2015-08-08 16:04 ` Russell King 2015-10-06 18:01 ` Fabio Estevam 2015-10-06 18:01 ` Fabio Estevam 2015-10-06 18:01 ` Fabio Estevam 2015-08-08 16:04 ` [PATCH 12/12] drm: bridge/dw_hdmi: improve HDMI enable/disable handling Russell King 2015-08-08 16:04 ` Russell King 2015-10-06 18:03 ` Fabio Estevam 2015-10-06 18:03 ` Fabio Estevam 2015-10-06 18:03 ` Fabio Estevam 2015-08-08 16:09 ` [PATCH 0/9] dw-hdmi audio support Russell King - ARM Linux 2015-08-08 16:09 ` Russell King - ARM Linux 2015-08-08 16:09 ` Russell King - ARM Linux 2015-08-08 16:10 ` [PATCH 1/9] drm: bridge/dw_hdmi-ahb-audio: add audio driver Russell King 2015-08-08 16:10 ` Russell King 2015-08-08 16:10 ` Russell King 2015-08-10 10:05 ` Takashi Iwai 2015-08-10 10:05 ` Takashi Iwai 2015-08-10 10:05 ` Takashi Iwai 2015-08-10 10:39 ` Russell King - ARM Linux 2015-08-10 10:39 ` Russell King - ARM Linux 2015-08-10 10:39 ` Russell King - ARM Linux 2015-08-10 12:23 ` Takashi Iwai 2015-08-10 12:23 ` Takashi Iwai 2015-08-10 12:23 ` Takashi Iwai 2015-08-10 16:49 ` Russell King - ARM Linux 2015-08-10 16:49 ` Russell King - ARM Linux 2015-08-10 16:49 ` Russell King - ARM Linux 2015-08-10 18:16 ` Mark Brown [this message] 2015-08-10 18:16 ` Mark Brown 2015-08-14 13:54 ` [PATCH v2 1/9] drm: bridge/dw_hdmi-ahb-audio: add audio driver David Airlie <airlied@linux.ie>, Sascha Hauer <s.hauer@pengutronix.de>, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Jaroslav Kysela <perex@perex.cz>, linux-rockchip@lists.infradead.org, Mark Brown <broonie@kernel.org>, Philipp Zabel <p.zabel@pengutronix.de>, Yakir Yang <ykk@rock-chips.com>, Andy Yan <andy.yan@rock-chips.com>, Jon Nettleton <jon.nettleton@gmail.com>, linux-arm-kernel@lists.infradead.org Russell King 2015-08-14 13:54 ` Russell King 2015-08-14 13:54 ` Russell King 2015-08-14 14:04 ` [PATCH v2 1/9] drm: bridge/dw_hdmi-ahb-audio: add audio driver Russell King 2015-08-14 14:04 ` Russell King 2015-08-14 14:04 ` Russell King 2015-08-14 14:34 ` [alsa-devel] " Takashi Iwai 2015-08-14 14:34 ` Takashi Iwai 2015-08-14 14:34 ` Takashi Iwai 2015-10-06 18:07 ` [PATCH " Fabio Estevam 2015-10-06 18:07 ` Fabio Estevam 2015-10-06 18:07 ` Fabio Estevam 2015-10-06 18:18 ` Russell King - ARM Linux 2015-10-06 18:18 ` Russell King - ARM Linux 2015-10-06 18:18 ` Russell King - ARM Linux 2015-10-06 18:45 ` Fabio Estevam 2015-10-06 18:45 ` Fabio Estevam 2015-10-06 18:45 ` Fabio Estevam 2015-10-06 18:54 ` Russell King - ARM Linux 2015-10-06 18:54 ` Russell King - ARM Linux 2015-10-06 18:54 ` Russell King - ARM Linux 2015-10-06 20:25 ` Fabio Estevam 2015-10-06 20:25 ` Fabio Estevam 2015-10-06 20:25 ` Fabio Estevam 2015-10-09 16:00 ` Russell King - ARM Linux 2015-10-09 16:00 ` Russell King - ARM Linux 2015-10-09 16:00 ` Russell King - ARM Linux 2015-10-09 16:02 ` Fabio Estevam 2015-10-09 16:02 ` Fabio Estevam 2015-10-09 16:02 ` Fabio Estevam 2015-10-09 16:11 ` Russell King - ARM Linux 2015-10-09 16:11 ` Russell King - ARM Linux 2015-10-09 16:11 ` Russell King - ARM Linux 2015-08-08 16:10 ` [PATCH 2/9] drm: bridge/dw_hdmi-ahb-audio: parse ELD from HDMI driver Russell King 2015-08-08 16:10 ` Russell King 2015-08-08 16:10 ` Russell King 2015-08-08 16:10 ` [PATCH 3/9] drm: bridge/dw_hdmi-ahb-audio: basic support for multi-channel PCM audio Russell King 2015-08-08 16:10 ` Russell King 2015-08-08 16:10 ` [PATCH 4/9] drm: bridge/dw_hdmi-ahb-audio: allow larger buffer sizes Russell King 2015-08-08 16:10 ` Russell King 2015-08-08 16:10 ` Russell King 2015-08-08 16:10 ` [PATCH 5/9] drm: bridge/dw_hdmi: avoid being recursive in N calculation Russell King 2015-08-08 16:10 ` Russell King 2015-08-08 16:10 ` Russell King 2015-09-04 17:50 ` Doug Anderson 2015-09-04 17:50 ` Doug Anderson 2015-09-04 17:50 ` Doug Anderson 2015-08-08 16:10 ` [PATCH 6/9] drm: bridge/dw_hdmi: adjust pixel clock values " Russell King 2015-08-08 16:10 ` Russell King 2015-08-08 16:10 ` Russell King 2015-09-04 18:21 ` Doug Anderson 2015-09-04 18:21 ` Doug Anderson 2015-09-04 18:21 ` Doug Anderson 2015-09-04 19:48 ` Doug Anderson 2015-09-04 19:48 ` Doug Anderson 2015-09-04 19:48 ` Doug Anderson 2015-09-04 21:24 ` Russell King - ARM Linux 2015-09-04 21:24 ` Russell King - ARM Linux 2015-09-04 21:24 ` Russell King - ARM Linux 2015-09-04 23:50 ` Doug Anderson 2015-09-04 23:50 ` Doug Anderson 2015-09-04 23:50 ` Doug Anderson 2015-09-05 0:27 ` Russell King - ARM Linux 2015-09-05 0:27 ` Russell King - ARM Linux 2015-09-05 0:27 ` Russell King - ARM Linux 2015-09-05 2:03 ` Doug Anderson 2015-09-05 2:03 ` Doug Anderson 2015-09-05 2:03 ` Doug Anderson 2015-09-05 8:31 ` Russell King - ARM Linux 2015-09-05 8:31 ` Russell King - ARM Linux 2015-09-05 8:31 ` Russell King - ARM Linux 2015-09-05 13:46 ` Doug Anderson 2015-09-05 13:46 ` Doug Anderson 2015-09-05 13:46 ` Doug Anderson 2015-09-05 14:01 ` Russell King - ARM Linux 2015-09-05 14:01 ` Russell King - ARM Linux 2015-09-05 14:01 ` Russell King - ARM Linux 2015-09-05 19:44 ` Doug Anderson 2015-09-05 19:44 ` Doug Anderson 2015-09-05 19:44 ` Doug Anderson 2015-09-05 8:34 ` Russell King - ARM Linux 2015-09-05 8:34 ` Russell King - ARM Linux 2015-09-05 8:34 ` Russell King - ARM Linux 2015-09-05 13:50 ` Doug Anderson 2015-09-05 13:50 ` Doug Anderson 2015-09-05 13:50 ` Doug Anderson 2015-08-08 16:10 ` [PATCH 7/9] drm: bridge/dw_hdmi: remove ratio support from ACR code Russell King 2015-08-08 16:10 ` Russell King 2015-08-08 16:10 ` Russell King 2015-09-04 18:24 ` Doug Anderson 2015-09-04 18:24 ` Doug Anderson 2015-09-04 18:24 ` Doug Anderson 2015-08-08 16:10 ` [PATCH 8/9] drm: bridge/dw_hdmi: replace CTS calculation for the ACR Russell King 2015-08-08 16:10 ` Russell King 2015-09-04 20:00 ` Doug Anderson 2015-09-04 20:00 ` Doug Anderson 2015-09-04 20:00 ` Doug Anderson 2015-08-08 16:10 ` [PATCH 9/9] drm: bridge/dw_hdmi-i2s-audio: add audio driver Russell King 2015-08-08 16:10 ` Russell King 2015-08-10 15:48 ` Russell King - ARM Linux 2015-08-10 15:48 ` Russell King - ARM Linux 2015-08-10 15:48 ` Russell King - ARM Linux 2015-08-10 16:26 ` Yakir Yang 2015-08-10 16:26 ` Yakir Yang 2015-08-10 16:26 ` Yakir Yang 2015-08-27 8:42 ` [PATCH 0/9] dw-hdmi audio support Philipp Zabel 2015-08-27 8:42 ` Philipp Zabel 2015-08-27 8:42 ` Philipp Zabel 2016-01-05 15:40 ` [alsa-devel] " Jean-Michel Hautbois 2016-01-05 15:40 ` Jean-Michel Hautbois 2016-01-05 15:54 ` Fabio Estevam 2016-01-05 15:54 ` Fabio Estevam 2016-01-05 15:54 ` Fabio Estevam 2016-01-05 16:04 ` Russell King - ARM Linux 2016-01-05 16:04 ` Russell King - ARM Linux 2016-01-05 16:04 ` Russell King - ARM Linux 2016-01-07 8:21 ` Jean-Michel Hautbois 2016-01-07 8:21 ` Jean-Michel Hautbois 2016-01-07 8:21 ` Jean-Michel Hautbois 2015-08-10 12:21 ` [PATCH 00/12] dw-hdmi development Thierry Reding 2015-08-10 12:21 ` Thierry Reding 2015-08-10 12:21 ` Thierry Reding 2015-08-18 10:37 ` Russell King - ARM Linux 2015-08-18 10:37 ` Russell King - ARM Linux 2015-08-18 10:37 ` Russell King - ARM Linux
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