From: Mark Brown <broonie@kernel.org> To: Koro Chen <koro.chen@mediatek.com> Cc: robh+dt@kernel.org, matthias.bgg@gmail.com, perex@perex.cz, tiwai@suse.de, srv_heupstream@mediatek.com, linux-mediatek@lists.infradead.org, s.hauer@pengutronix.de, galak@codeaurora.org, lgirdwood@gmail.com, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org Subject: Re: [RESEND RFC PATCH 1/3] ASoC: mediatek: Add binding support for AFE driver Date: Sat, 18 Apr 2015 18:34:07 +0100 [thread overview] Message-ID: <20150418173407.GE26185@sirena.org.uk> (raw) In-Reply-To: <1428653649-38200-2-git-send-email-koro.chen@mediatek.com> [-- Attachment #1: Type: text/plain, Size: 1306 bytes --] On Fri, Apr 10, 2015 at 04:14:07PM +0800, Koro Chen wrote: > +Each external interface (called "IO" in this driver) is presented as a > +DAI to ASoC. An IO must be connected via the interconnect to a memif. > +The connection paths are configured through the device tree. Why are these connection paths configured via device tree? I would expect that either there would be runtime configurability of these things (particularly if loopback configurations within the hardware are possible) or we'd just allocate memory interfaces to DAIs automatically as DAIs come into use. > +- mem-interface-playback: > + mem-interface-capture: property of memif, format is: <memif irq use_sram>; > + memif: which memif to be used > + (defined in include/dt-bindings/sound/mtk-afe.h) > + irq: which irq to be used > + (defined in include/dt-bindings/sound/mtk-afe.h) > + use_sram: 1 is yes, 0 is no Again, this looks like stuff we should be able to figure out at runtime - the use of SRAM in particular looks like something we might want to change depending on use case. Assuming it adds buffering then for a VoIP application we might not want to use SRAM to minimize latency but during music playback we might want to enable SRAM to minimize power consumption. [-- Attachment #2: Digital signature --] [-- Type: application/pgp-signature, Size: 473 bytes --]
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From: broonie@kernel.org (Mark Brown) To: linux-arm-kernel@lists.infradead.org Subject: [RESEND RFC PATCH 1/3] ASoC: mediatek: Add binding support for AFE driver Date: Sat, 18 Apr 2015 18:34:07 +0100 [thread overview] Message-ID: <20150418173407.GE26185@sirena.org.uk> (raw) In-Reply-To: <1428653649-38200-2-git-send-email-koro.chen@mediatek.com> On Fri, Apr 10, 2015 at 04:14:07PM +0800, Koro Chen wrote: > +Each external interface (called "IO" in this driver) is presented as a > +DAI to ASoC. An IO must be connected via the interconnect to a memif. > +The connection paths are configured through the device tree. Why are these connection paths configured via device tree? I would expect that either there would be runtime configurability of these things (particularly if loopback configurations within the hardware are possible) or we'd just allocate memory interfaces to DAIs automatically as DAIs come into use. > +- mem-interface-playback: > + mem-interface-capture: property of memif, format is: <memif irq use_sram>; > + memif: which memif to be used > + (defined in include/dt-bindings/sound/mtk-afe.h) > + irq: which irq to be used > + (defined in include/dt-bindings/sound/mtk-afe.h) > + use_sram: 1 is yes, 0 is no Again, this looks like stuff we should be able to figure out at runtime - the use of SRAM in particular looks like something we might want to change depending on use case. Assuming it adds buffering then for a VoIP application we might not want to use SRAM to minimize latency but during music playback we might want to enable SRAM to minimize power consumption. -------------- 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/20150418/f9a9b312/attachment.sig>
next prev parent reply other threads:[~2015-04-18 17:34 UTC|newest] Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-04-10 8:14 [RESEND RFC PATCH 0/3] ASoC: Mediatek: Add support for MT8173 SOC Koro Chen 2015-04-10 8:14 ` [RESEND RFC PATCH 1/3] ASoC: mediatek: Add binding support for AFE driver Koro Chen 2015-04-18 17:34 ` Mark Brown [this message] 2015-04-18 17:34 ` Mark Brown 2015-04-20 4:37 ` Sascha Hauer 2015-04-20 4:37 ` Sascha Hauer 2015-04-20 4:37 ` Sascha Hauer 2015-04-20 20:48 ` Mark Brown 2015-04-20 20:48 ` Mark Brown 2015-04-20 20:48 ` Mark Brown 2015-04-21 9:49 ` Sascha Hauer 2015-04-21 9:49 ` Sascha Hauer 2015-04-21 9:49 ` Sascha Hauer 2015-04-21 10:14 ` Mark Brown 2015-04-21 10:14 ` Mark Brown 2015-04-21 10:15 ` Koro Chen 2015-04-21 10:15 ` Koro Chen 2015-04-21 10:15 ` Koro Chen 2015-04-21 10:56 ` Mark Brown 2015-04-21 10:56 ` Mark Brown 2015-04-22 3:17 ` Koro Chen 2015-04-22 3:17 ` Koro Chen 2015-04-22 3:17 ` Koro Chen 2015-04-30 20:12 ` Mark Brown 2015-04-30 20:12 ` Mark Brown 2015-04-30 20:12 ` Mark Brown 2015-05-04 1:57 ` Koro Chen 2015-05-04 1:57 ` Koro Chen 2015-05-04 1:57 ` Koro Chen 2015-04-10 8:14 ` [RESEND RFC PATCH 2/3] ASoC: mediatek: Add AFE connection control Koro Chen 2015-04-18 17:37 ` Mark Brown 2015-04-18 17:37 ` Mark Brown 2015-04-18 17:37 ` Mark Brown 2015-04-20 4:50 ` Sascha Hauer 2015-04-20 4:50 ` Sascha Hauer 2015-04-20 4:50 ` Sascha Hauer 2015-04-20 20:52 ` Mark Brown 2015-04-20 20:52 ` Mark Brown 2015-04-20 20:52 ` Mark Brown 2015-04-21 5:50 ` Sascha Hauer 2015-04-21 5:50 ` Sascha Hauer 2015-04-21 5:50 ` Sascha Hauer 2015-04-21 10:15 ` Mark Brown 2015-04-21 10:15 ` Mark Brown 2015-04-21 10:15 ` Mark Brown 2015-04-10 8:14 ` [RESEND RFC PATCH 3/3] ASoC: mediatek: Add AFE platform driver Koro Chen 2015-04-18 17:51 ` Mark Brown 2015-04-18 17:51 ` Mark Brown 2015-04-20 6:22 ` Koro Chen 2015-04-20 6:22 ` Koro Chen 2015-04-20 6:22 ` Koro Chen 2015-04-20 20:55 ` Mark Brown 2015-04-20 20:55 ` Mark Brown 2015-04-20 20:55 ` Mark Brown 2015-04-21 2:27 ` Koro Chen 2015-04-21 2:27 ` Koro Chen 2015-04-21 2:27 ` Koro Chen 2015-04-21 10:05 ` Mark Brown 2015-04-21 10:05 ` Mark Brown
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