From: "Frank Schäfer" <fschaefer.oss@googlemail.com>
To: Devin Heitmueller <dheitmueller@kernellabs.com>
Cc: linux-media@vger.kernel.org
Subject: Re: [PATCH v2 21/21] em28xx: add module parameter for selection of the preferred USB transfer type
Date: Thu, 08 Nov 2012 20:37:41 +0200 [thread overview]
Message-ID: <509BFBF5.7050209@googlemail.com> (raw)
In-Reply-To: <CAGoCfiwHviRd8-tsmwxf8=eLbiapUwnrvCM2qB2M5skiqXMNVw@mail.gmail.com>
Am 08.11.2012 21:19, schrieb Devin Heitmueller:
> On Thu, Nov 8, 2012 at 1:11 PM, Frank Schäfer
> <fschaefer.oss@googlemail.com> wrote:
>> By default, isoc transfers are used if possible.
>> With the new module parameter, bulk can be selected as the
>> preferred USB transfer type.
> Hi Frank,
>
> Does your device actually expose both isoc and bulk endpoints? If I
> recall from the datasheet, whether isoc or bulk mode is provided is
> not actually configurable from the driver. The EEPROM dictates how
> the endpoint map gets defined, and hence it's either one or the other.
> If that is indeed the case, then we don't need a modprobe option at
> all (since would never actually be user configurable), and we should
> just add a field to the board definition to indicate that bulk should
> be used for that product.
>
> Devin
>
Hi Devin,
at least the "Silvercrest Webcam 1.3mpix" (board 71) exposes both
endpoint types (0x82=isoc and 0x84=bulk).
Regards,
Frank
next prev parent reply other threads:[~2012-11-08 19:37 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-08 18:11 [PATCH v2 00/21] em28xx: add support fur USB bulk transfers Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 01/21] em28xx: fix wrong data offset for non-interlaced mode in em28xx_copy_video Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 02/21] em28xx: clarify meaning of field 'progressive' in struct em28xx Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 03/21] em28xx: rename isoc packet number constants and parameters Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 04/21] em28xx: rename struct em28xx_usb_isoc_bufs to em28xx_usb_bufs Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 05/21] em28xx: rename struct em28xx_usb_isoc_ctl to em28xx_usb_ctl Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 06/21] em28xx: remove obsolete #define EM28XX_URB_TIMEOUT Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 07/21] em28xx: update description of em28xx_irq_callback Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 08/21] em28xx: rename function em28xx_uninit_isoc to em28xx_uninit_usb_xfer Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 09/21] em28xx: create a common function for isoc and bulk URB allocation and setup Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 10/21] em28xx: create a common function for isoc and bulk USB transfer initialization Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 11/21] em28xx: clear USB halt/stall condition in em28xx_init_usb_xfer when using bulk transfers Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 12/21] em28xx: remove double checks for urb->status == -ENOENT in urb_data_copy functions Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 13/21] em28xx: rename function em28xx_isoc_copy and extend for USB bulk transfers Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 14/21] em28xx: rename function em28xx_isoc_copy_vbi " Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 15/21] em28xx: rename function em28xx_dvb_isoc_copy " Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 16/21] em28xx: rename usb debugging module parameter and macro Frank Schäfer
2012-12-22 20:10 ` Mauro Carvalho Chehab
2012-12-23 13:34 ` Frank Schäfer
2012-12-23 13:39 ` Mauro Carvalho Chehab
2012-11-08 18:11 ` [PATCH v2 17/21] em28xx: rename some USB parameter fields in struct em28xx to clarify their role Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 18/21] em28xx: add fields for analog and DVB USB transfer type selection to struct em28xx Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 19/21] em28xx: set USB alternate settings for analog video bulk transfers properly Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 20/21] em28xx: improve USB endpoint logic, also use bulk transfers Frank Schäfer
2012-11-08 18:11 ` [PATCH v2 21/21] em28xx: add module parameter for selection of the preferred USB transfer type Frank Schäfer
2012-11-08 19:19 ` Devin Heitmueller
2012-11-08 18:37 ` Frank Schäfer [this message]
2012-11-08 19:46 ` Devin Heitmueller
2012-11-09 16:00 ` Frank Schäfer
2012-11-09 17:08 ` Devin Heitmueller
2012-12-23 13:44 ` Mauro Carvalho Chehab
2012-12-23 14:01 ` Frank Schäfer
2012-12-23 14:12 ` Mauro Carvalho Chehab
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