From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> To: Wesley Cheng <quic_wcheng@quicinc.com> Cc: srinivas.kandagatla@linaro.org, mathias.nyman@intel.com, perex@perex.cz, broonie@kernel.org, lgirdwood@gmail.com, andersson@kernel.org, krzysztof.kozlowski+dt@linaro.org, gregkh@linuxfoundation.org, Thinh.Nguyen@synopsys.com, bgoswami@quicinc.com, tiwai@suse.com, robh+dt@kernel.org, agross@kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, devicetree@vger.kernel.org, linux-usb@vger.kernel.org, quic_jackp@quicinc.com, quic_plai@quicinc.com Subject: Re: [RFC PATCH 04/14] sound: usb: card: Introduce USB SND vendor op callbacks Date: Tue, 27 Dec 2022 23:33:10 +0200 [thread overview] Message-ID: <f6e4e538-b4dd-a45a-0078-ea7ebb960672@linaro.org> (raw) In-Reply-To: <730d8cbc-c391-6d77-2374-713f539d38b6@quicinc.com> On 27/12/2022 23:07, Wesley Cheng wrote: > Hi Dmitry, > > On 12/24/2022 3:03 AM, Dmitry Baryshkov wrote: >> Hi, >> >> On Sat, 24 Dec 2022 at 01:33, Wesley Cheng <quic_wcheng@quicinc.com> >> wrote: >>> >>> Allow for different vendors to be notified on USB SND connect/disconnect >>> seqeunces. This allows for vendor USB SND modules to properly >>> initialize >>> and populate internal structures with references to the USB SND chip >>> device. >> >> The commit message definitely needs some improvement. We do not notify >> vendors on SND connect/disconnect events. >> >> >>> >>> Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com> >>> --- >>> sound/usb/card.c | 22 ++++++++++++++++++++++ >>> sound/usb/card.h | 7 +++++++ >>> 2 files changed, 29 insertions(+) >>> >>> diff --git a/sound/usb/card.c b/sound/usb/card.c >>> index 26268ffb8274..212f55a7683c 100644 >>> --- a/sound/usb/card.c >>> +++ b/sound/usb/card.c >>> @@ -117,6 +117,21 @@ MODULE_PARM_DESC(skip_validation, "Skip unit >>> descriptor validation (default: no) >>> static DEFINE_MUTEX(register_mutex); >>> static struct snd_usb_audio *usb_chip[SNDRV_CARDS]; >>> static struct usb_driver usb_audio_driver; >>> +static struct snd_usb_vendor_ops *vendor_ops; >>> + >>> +int snd_usb_register_vendor_ops(struct snd_usb_vendor_ops *ops) >> >> platform ops? >> > > Will change it. > >>> +{ >>> + vendor_ops = ops; >>> + return 0; >>> +} >>> +EXPORT_SYMBOL_GPL(snd_usb_register_vendor_ops); >> >> What happens if several platforms try to register different ops? I saw >> from the patch 09/14 that you register these ops unconditionally. If >> other devices follow your approach there is an obvious conflict. >> > > Thank you for the review. > > That is true. I don't think there is a proper need to have multiple > vendor ops being registered, so maybe just returning an error for if ops > are already registered is sufficient. This would be a required step. And also you have to check the running platform before registering your ops unconditionally. Ideally this should be done as a part of the device's driver, so that we can control registration of the platform ops using the usual interface. > > Thanks > Wesley Cheng -- With best wishes Dmitry
WARNING: multiple messages have this Message-ID (diff)
From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> To: Wesley Cheng <quic_wcheng@quicinc.com> Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, alsa-devel@alsa-project.org, linux-usb@vger.kernel.org, bgoswami@quicinc.com, mathias.nyman@intel.com, gregkh@linuxfoundation.org, andersson@kernel.org, tiwai@suse.com, lgirdwood@gmail.com, robh+dt@kernel.org, broonie@kernel.org, srinivas.kandagatla@linaro.org, agross@kernel.org, krzysztof.kozlowski+dt@linaro.org, Thinh.Nguyen@synopsys.com, quic_plai@quicinc.com, linux-kernel@vger.kernel.org, quic_jackp@quicinc.com Subject: Re: [RFC PATCH 04/14] sound: usb: card: Introduce USB SND vendor op callbacks Date: Tue, 27 Dec 2022 23:33:10 +0200 [thread overview] Message-ID: <f6e4e538-b4dd-a45a-0078-ea7ebb960672@linaro.org> (raw) In-Reply-To: <730d8cbc-c391-6d77-2374-713f539d38b6@quicinc.com> On 27/12/2022 23:07, Wesley Cheng wrote: > Hi Dmitry, > > On 12/24/2022 3:03 AM, Dmitry Baryshkov wrote: >> Hi, >> >> On Sat, 24 Dec 2022 at 01:33, Wesley Cheng <quic_wcheng@quicinc.com> >> wrote: >>> >>> Allow for different vendors to be notified on USB SND connect/disconnect >>> seqeunces. This allows for vendor USB SND modules to properly >>> initialize >>> and populate internal structures with references to the USB SND chip >>> device. >> >> The commit message definitely needs some improvement. We do not notify >> vendors on SND connect/disconnect events. >> >> >>> >>> Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com> >>> --- >>> sound/usb/card.c | 22 ++++++++++++++++++++++ >>> sound/usb/card.h | 7 +++++++ >>> 2 files changed, 29 insertions(+) >>> >>> diff --git a/sound/usb/card.c b/sound/usb/card.c >>> index 26268ffb8274..212f55a7683c 100644 >>> --- a/sound/usb/card.c >>> +++ b/sound/usb/card.c >>> @@ -117,6 +117,21 @@ MODULE_PARM_DESC(skip_validation, "Skip unit >>> descriptor validation (default: no) >>> static DEFINE_MUTEX(register_mutex); >>> static struct snd_usb_audio *usb_chip[SNDRV_CARDS]; >>> static struct usb_driver usb_audio_driver; >>> +static struct snd_usb_vendor_ops *vendor_ops; >>> + >>> +int snd_usb_register_vendor_ops(struct snd_usb_vendor_ops *ops) >> >> platform ops? >> > > Will change it. > >>> +{ >>> + vendor_ops = ops; >>> + return 0; >>> +} >>> +EXPORT_SYMBOL_GPL(snd_usb_register_vendor_ops); >> >> What happens if several platforms try to register different ops? I saw >> from the patch 09/14 that you register these ops unconditionally. If >> other devices follow your approach there is an obvious conflict. >> > > Thank you for the review. > > That is true. I don't think there is a proper need to have multiple > vendor ops being registered, so maybe just returning an error for if ops > are already registered is sufficient. This would be a required step. And also you have to check the running platform before registering your ops unconditionally. Ideally this should be done as a part of the device's driver, so that we can control registration of the platform ops using the usual interface. > > Thanks > Wesley Cheng -- With best wishes Dmitry
next prev parent reply other threads:[~2022-12-27 21:33 UTC|newest] Thread overview: 171+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-12-23 23:31 [RFC PATCH 00/14] Introduce QC USB SND audio offloading support Wesley Cheng 2022-12-23 23:31 ` Wesley Cheng 2022-12-23 23:31 ` [RFC PATCH 01/14] ASoC: Add SOC USB APIs for adding an USB backend Wesley Cheng 2022-12-23 23:31 ` Wesley Cheng 2022-12-24 6:48 ` Greg KH 2022-12-24 6:48 ` Greg KH 2022-12-23 23:31 ` [RFC PATCH 02/14] ASoC: qcom: qdsp6: Introduce USB AFE port to q6dsp Wesley Cheng 2022-12-23 23:31 ` Wesley Cheng 2022-12-24 1:37 ` kernel test robot 2023-01-04 23:33 ` Pierre-Louis Bossart 2023-01-06 1:05 ` Wesley Cheng 2023-01-06 1:05 ` Wesley Cheng 2023-01-06 16:09 ` Pierre-Louis Bossart 2023-01-07 0:51 ` Wesley Cheng 2023-01-07 0:51 ` Wesley Cheng 2023-01-05 18:09 ` Krzysztof Kozlowski 2023-01-05 18:09 ` Krzysztof Kozlowski 2023-01-06 1:32 ` Wesley Cheng 2023-01-06 1:32 ` Wesley Cheng 2022-12-23 23:31 ` [RFC PATCH 03/14] ASoC: qcom: Add USB backend ASoC driver for Q6 Wesley Cheng 2022-12-23 23:31 ` Wesley Cheng 2022-12-24 2:17 ` kernel test robot 2022-12-24 2:17 ` kernel test robot 2022-12-24 9:02 ` Greg KH 2022-12-24 9:02 ` Greg KH 2022-12-27 13:04 ` Mark Brown 2022-12-27 13:04 ` Mark Brown 2022-12-27 13:45 ` Greg KH 2022-12-27 13:45 ` Greg KH 2022-12-27 14:02 ` Takashi Iwai 2022-12-27 14:02 ` Takashi Iwai 2022-12-27 14:11 ` Mark Brown 2022-12-27 14:11 ` Mark Brown 2022-12-27 15:11 ` Mark Brown 2022-12-27 15:11 ` Mark Brown 2022-12-27 21:06 ` Wesley Cheng 2022-12-27 21:06 ` Wesley Cheng 2022-12-27 21:07 ` Wesley Cheng 2022-12-27 21:07 ` Wesley Cheng 2023-01-04 23:41 ` Pierre-Louis Bossart 2023-01-06 1:05 ` Wesley Cheng 2023-01-06 1:05 ` Wesley Cheng 2023-01-06 16:16 ` Pierre-Louis Bossart 2022-12-23 23:31 ` [RFC PATCH 04/14] sound: usb: card: Introduce USB SND vendor op callbacks Wesley Cheng 2022-12-23 23:31 ` Wesley Cheng 2022-12-24 11:03 ` Dmitry Baryshkov 2022-12-24 11:03 ` Dmitry Baryshkov 2022-12-27 21:07 ` Wesley Cheng 2022-12-27 21:07 ` Wesley Cheng 2022-12-27 21:33 ` Dmitry Baryshkov [this message] 2022-12-27 21:33 ` Dmitry Baryshkov 2022-12-29 13:49 ` Oliver Neukum 2022-12-29 13:49 ` Oliver Neukum 2022-12-29 14:20 ` Takashi Iwai 2022-12-29 14:20 ` Takashi Iwai 2022-12-30 7:10 ` Wesley Cheng 2022-12-30 7:10 ` Wesley Cheng 2023-01-03 12:20 ` Oliver Neukum 2023-01-03 12:20 ` Oliver Neukum 2023-01-03 12:49 ` Takashi Iwai 2023-01-03 12:49 ` Takashi Iwai 2023-01-03 23:45 ` Wesley Cheng 2023-01-03 23:45 ` Wesley Cheng 2022-12-23 23:31 ` [RFC PATCH 05/14] sound: usb: Export USB SND APIs for modules Wesley Cheng 2022-12-23 23:31 ` Wesley Cheng 2022-12-24 6:48 ` Greg KH 2022-12-24 6:48 ` Greg KH 2022-12-23 23:31 ` [RFC PATCH 06/14] usb: core: hcd: Introduce USB HCD APIs for interrupter management Wesley Cheng 2022-12-23 23:31 ` Wesley Cheng 2022-12-24 8:54 ` Greg KH 2022-12-24 8:54 ` Greg KH 2022-12-27 21:13 ` Wesley Cheng 2022-12-27 21:13 ` Wesley Cheng 2022-12-24 15:29 ` Alan Stern 2022-12-24 15:29 ` Alan Stern 2022-12-27 21:07 ` Wesley Cheng 2022-12-27 21:07 ` Wesley Cheng 2022-12-28 8:59 ` Oliver Neukum 2022-12-28 8:59 ` Oliver Neukum 2022-12-28 15:16 ` Alan Stern 2022-12-28 15:16 ` Alan Stern 2022-12-28 20:31 ` Wesley Cheng 2022-12-28 20:31 ` Wesley Cheng 2022-12-29 1:41 ` Alan Stern 2022-12-29 1:41 ` Alan Stern 2022-12-23 23:31 ` [RFC PATCH 07/14] usb: host: xhci: Add XHCI secondary interrupter support Wesley Cheng 2022-12-23 23:31 ` Wesley Cheng 2022-12-24 5:59 ` kernel test robot 2022-12-24 8:55 ` Greg KH 2022-12-24 8:55 ` Greg KH 2022-12-28 15:47 ` Mathias Nyman 2022-12-28 15:47 ` Mathias Nyman 2022-12-29 21:14 ` Wesley Cheng 2022-12-29 21:14 ` Wesley Cheng 2023-01-02 16:38 ` Mathias Nyman 2023-01-02 16:38 ` Mathias Nyman 2023-01-09 20:24 ` Wesley Cheng 2023-01-09 20:24 ` Wesley Cheng 2023-01-10 19:47 ` Mathias Nyman 2023-01-10 19:47 ` Mathias Nyman 2023-01-10 20:03 ` Wesley Cheng 2023-01-10 20:03 ` Wesley Cheng 2023-01-11 3:11 ` Wesley Cheng 2023-01-11 3:11 ` Wesley Cheng 2023-01-12 9:24 ` Mathias Nyman 2023-01-12 9:24 ` Mathias Nyman 2023-01-13 0:34 ` Wesley Cheng 2023-01-13 0:34 ` Wesley Cheng 2022-12-23 23:31 ` [RFC PATCH 08/14] usb: dwc3: Add DT parameter to specify maximum number of interrupters Wesley Cheng 2022-12-23 23:31 ` Wesley Cheng 2022-12-24 11:13 ` Dmitry Baryshkov 2022-12-24 11:13 ` Dmitry Baryshkov 2022-12-26 12:28 ` Krzysztof Kozlowski 2022-12-26 12:28 ` Krzysztof Kozlowski 2022-12-27 21:06 ` Wesley Cheng 2022-12-27 21:06 ` Wesley Cheng 2022-12-23 23:31 ` [RFC PATCH 09/14] sound: usb: Introduce QC USB SND offloading support Wesley Cheng 2022-12-23 23:31 ` Wesley Cheng 2022-12-24 2:27 ` kernel test robot 2023-01-02 17:28 ` Takashi Iwai 2023-01-02 17:28 ` Takashi Iwai 2023-01-04 22:38 ` Wesley Cheng 2023-01-04 22:38 ` Wesley Cheng 2023-01-04 23:51 ` Pierre-Louis Bossart 2023-01-06 1:06 ` Wesley Cheng 2023-01-06 1:06 ` Wesley Cheng 2022-12-23 23:31 ` [RFC PATCH 10/14] sound: usb: card: Check for support for requested audio format Wesley Cheng 2022-12-23 23:31 ` Wesley Cheng 2022-12-24 8:59 ` Greg KH 2022-12-24 8:59 ` Greg KH 2022-12-27 21:07 ` Wesley Cheng 2022-12-27 21:07 ` Wesley Cheng 2022-12-27 20:31 ` kernel test robot 2022-12-23 23:31 ` [RFC PATCH 11/14] sound: soc: soc-usb: Add PCM format check API for USB backend Wesley Cheng 2022-12-23 23:31 ` Wesley Cheng 2022-12-24 2:17 ` kernel test robot 2022-12-24 2:17 ` kernel test robot 2022-12-23 23:31 ` [RFC PATCH 12/14] sound: soc: qcom: qusb6: Ensure PCM format is supported by USB audio device Wesley Cheng 2022-12-23 23:31 ` Wesley Cheng 2022-12-24 8:19 ` Sergey Shtylyov 2022-12-24 8:19 ` Sergey Shtylyov 2022-12-24 8:50 ` Wesley Cheng 2022-12-24 8:50 ` Wesley Cheng 2023-01-03 17:44 ` Mark Brown 2023-01-03 17:44 ` Mark Brown 2022-12-23 23:31 ` [RFC PATCH 13/14] ASoC: dt-bindings: Add Q6USB backend bindings Wesley Cheng 2022-12-23 23:31 ` Wesley Cheng 2022-12-26 12:25 ` Krzysztof Kozlowski 2022-12-26 12:25 ` Krzysztof Kozlowski 2022-12-23 23:32 ` [RFC PATCH 14/14] ASoC: dt-bindings: Update example for enabling USB offload on SM8250 Wesley Cheng 2022-12-23 23:32 ` Wesley Cheng 2022-12-26 12:27 ` Krzysztof Kozlowski 2022-12-26 12:27 ` Krzysztof Kozlowski 2023-01-03 17:46 ` Mark Brown 2023-01-03 17:46 ` Mark Brown 2023-01-05 18:09 ` Krzysztof Kozlowski 2023-01-05 18:09 ` Krzysztof Kozlowski 2023-01-04 0:46 ` Rob Herring 2023-01-04 0:46 ` Rob Herring 2022-12-24 6:45 ` [RFC PATCH 00/14] Introduce QC USB SND audio offloading support Greg KH 2022-12-24 6:45 ` Greg KH 2022-12-24 8:49 ` Wesley Cheng 2022-12-24 8:49 ` Wesley Cheng 2022-12-27 14:36 ` Mark Brown 2022-12-27 14:36 ` Mark Brown 2023-01-04 23:19 ` Pierre-Louis Bossart 2023-01-06 1:05 ` Wesley Cheng 2023-01-06 1:05 ` Wesley Cheng 2023-01-06 15:57 ` Pierre-Louis Bossart 2023-01-07 0:46 ` Wesley Cheng 2023-01-07 0:46 ` Wesley Cheng
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