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charset="utf-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Cc: "alsa-devel@alsa-project.org" , "neil.armstrong@linaro.org" , "nfraprado@collabora.com" , =?utf-8?B?Q2h1bnh1IExpICjmnY7mmKXml60p?= , =?utf-8?B?QWxsZW4tS0ggQ2hlbmcgKOeoi+WGoOWLsyk=?= , "kuninori.morimoto.gx@renesas.com" , "linux-kernel@vger.kernel.org" , "dri-devel@lists.freedesktop.org" , Project_Global_Chrome_Upstream_Group , "linux-mediatek@lists.infradead.org" , "robert.foss@linaro.org" , "andrzej.hajda@intel.com" , "angelogioacchino.delregno@collabora.com" , "ajye_huang@compal.corp-partner.google.com" , "linux-arm-kernel@lists.infradead.org" , "Laurent.pinchart@ideasonboard.com" X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" On Tue, 2022-11-29 at 17:22 +0000, Mark Brown wrote: > On Mon, Nov 28, 2022 at 03:07:22PM +0000, Jiaxin Yu (俞家鑫) wrote: > > On Fri, 2022-11-25 at 12:18 +0000, Mark Brown wrote: > > > On Fri, Nov 25, 2022 at 05:44:11PM +0800, Jiaxin Yu wrote: > > > I'm a little unclear why this is being implemented as a DAPM > > > operation > > > rather than having the driver forward the PCM trigger op if it's > > > needed? > > > Or alternatively if a DAPM callback is needed why not provide one > > > directly rather than hooking into the trigger function - that's > > > going > > > to > > > be called out of sequence with the rest of DAPM and be > > > potentially > > > confusing given the very different environments that trigger and > > > DAPM > > > operations run in. A quick glance at the it6505 driver suggests > > > it'd > > > be > > > happier with a DAPM callback. > > Let me describe the hardware connection about mt8186 with > > it6505(hdmi) > > and rt1015p(speakers). > > ==>it6505 > > = > > DL1(FE) ==>I2S3(BE) = > > = > > ==>rt1015p > > They shared the same one i2s port, but we'd like to control them > > separately. So if hdmi-codec use the PCM trigger op, whne we turn > > on > > the speaker, hdmi-codec's PCM trigger op is also executed, > > resulting in > > sound on both devices. > > Is there another way to control them separately? Thank you. > > If you just need power control for one or both devices then the > machine > driver can add a _PIN_SWITCH() on the output of the device, that'll > cause DAPM to keep the device powered down when not in use. That > should > work well with the suggestion to provide a DAPM callback instead of a > a > trigger operation. Yes, we do use a _PIN_SWITCH() on the outout of the device: > static const struct snd_kcontrol_new > mt8186_mt6366_rt1019_rt5682s_controls[] = { > SOC_DAPM_PIN_SWITCH("Speakers"), > SOC_DAPM_PIN_SWITCH("Headphone"), > SOC_DAPM_PIN_SWITCH("Headset Mic"), > SOC_DAPM_PIN_SWITCH("HDMI1"), > }; Which operation should I use to inform bridge driver to control audio on or off? I'm curious why I don't see .trigger in the structure hdmi_codec_ops compared to the structure snd_soc_dai_ops? ************* MEDIATEK Confidentiality Notice ******************** The information contained in this e-mail message (including any attachments) may be confidential, proprietary, privileged, or otherwise exempt from disclosure under applicable laws. It is intended to be conveyed only to the designated recipient(s). Any use, dissemination, distribution, printing, retaining or copying of this e-mail (including its attachments) by unintended recipient(s) is strictly prohibited and may be unlawful. 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