Re: spca1528 device (Device 015: ID 04fc:1528 Sunplus Technology)..libv4l2: error turning on stream: Timer expired issue

[Mauricio Henriquez]

On 09/05/2011 03:19 AM, Jean-Francois Moine wrote:
On Sun, 04 Sep 2011 15:39:30 -0400
Mauricio Henriquez<buhochil...@gmail.com>  wrote:
   
Recently I'm trying to make work a Sunplus crappy mini HD USB camera, lsusb
list this info related to the device:

Picture Transfer Protocol (PIMA 15470)
Bus 001 Device 015: ID 04fc:1528 Sunplus Technology Co., Ltd

   idVendor           0x04fc Sunplus Technology Co., Ltd
    idProduct          0x1528
    bcdDevice            1.00
    iManufacturer           1 Sunplus Co Ltd
    iProduct                2 General Image Devic
    iSerial                 0
...

Using the gspca-2.13.6 on my Fed12 (2.6.31.6-166.fc12.i686.PAE kernel), the
device is listed as /dev/video1 and no error doing a dmesg...but trying to
make it work, let say with xawtv, I get:
     
        [snip]

Hi Mauricio,

The problem seems tied to the alternate setting. It must be the #3
while the lastest versions of gspca compute a "best" one. May you apply
the following patch to gspca-2.13.6?
   
Thanks Jean, yeap I apply the patch, but still the same kind of messages 
about timeout sing xawtv or svv:

xawtv:
ioctl: VIDIOC_S_STD(std=0x0 []): Invalid argument
libv4l2: error turning on stream: Timer expired
libv4l2: error reading: Invalid argument
v4l2: read: Invalid argument
libv4l2: error turning on stream: Timer expired
ioctl: VIDIOC_STREAMON(int=1): Timer expired
v4l2: oops: select timeout
ioctl: VIDIOC_REQBUFS(count=0;type=VIDEO_CAPTURE;memory=MMAP): Device or 
resource busy
libv4l2: error reading: Invalid argument
v4l2: read: Invalid argument

svv:
raw pixfmt: JPEG 640x480
pixfmt: RGB3 640x480
mmap method
VIDIOC_STREAMON error 62, Timer expired

this camera in mass storage mode works ok...

Cheers

Mauricio

----------------------8<----------------------
--- build/spca1528.c.orig       2011-09-05 08:41:54.000000000 +0200
+++ build/spca1528.c    2011-09-05 08:53:51.000000000 +0200
@@ -307,8 +307,6 @@
        sd->color = COLOR_DEF;
        sd->sharpness = SHARPNESS_DEF;

-       gspca_dev->nbalt = 4;                /* use alternate setting 3 */
-
        return 0;
  }

@@ -349,6 +347,9 @@
        reg_r(gspca_dev, 0x25, 0x0004, 1);
        reg_wb(gspca_dev, 0x27, 0x0000, 0x0000, 0x06);
        reg_r(gspca_dev, 0x27, 0x0000, 1);
+
+       gspca_dev->alt = 4;          /* use alternate setting 3 */
+
        return gspca_dev->usb_err;
  }

----------------------8<----------------------

(Theodore, this webcam may work in mass storage mode with ID 04fc:0171.
In webcam mode with ID 04fc:1528, it offers 3 interfaces: interface 0
contains only an interrupt endpoint, interface 1 is the webcam with
only isochronous endpoints and interface 2 contains bulk in, bulk out
and interrupt in endpoints - I don't know how to use the interfaces 0
and 2, but sure the interface 2 could be used to access the camera
images)

   


--
Mauricio R. Henriquez Schott
Escuela de Ingeniería en Computación
Universidad Austral de Chile - Sede Puerto Montt
Los Pinos S/N, Balneario de Pelluco, Puerto Montt - Chile
Tel: 65-487440
Fax: 65-277156
mail: mauriciohenriq...@uach.cl

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