Ok I solved the segfault problem by updating some of my v4l2 files
(specifically v4l2-common.c). Now I only get nice sounding console messages.
Linux media interface: v0.10
Linux video capture interface: v2.00
omap3isp omap3isp: Revision 2.0 found
omap-iommu omap-iommu.0: isp: version 1.1
omap3isp omap3isp: hist: DMA channel = 4
mt9v032 3-005c: Probing MT9V032 at address 0x5c
omap3isp omap3isp: isp_set_xclk(): cam_xclka set to 28800000 Hz
omap3isp omap3isp: isp_set_xclk(): cam_xclka set to 0 Hz
mt9v032 3-005c: MT9V032 detected at address 0x5c
And a bunch of devices.
# ls /dev
...
v4l-subdev0
v4l-subdev1
v4l-subdev2
v4l-subdev3
v4l-subdev4
v4l-subdev5
v4l-subdev6
v4l-subdev7
v4l-subdev8
...
video0
video1
video2
video3
video4
video5
video6
...
But don't know how to start the camera. How can I test the module?
Neil
On 11-01-26 11:32 AM, Neil MacMunn wrote:
Hello,
When I modprobe omap3-isp I get a segfault. I'm attempting to use a
Gumstix Overo with Micron MT9V032.
root@overo:~# modprobe omap3-isp
Linux media interface: v0.10
Linux video capture interface: v2.00
omap3isp omap3isp: Revision 2.0 found
Unable to handle kernel NULL pointer dereference at virtual address
00000004
pgd = cd4b0000
[00000004] *pgd=8e77b031, *pte=00000000, *ppte=00000000
Internal error: Oops: 17 [#1]
last sysfs file: /sys/devices/virtual/net/lo/type
Modules linked in: omap3_isp(+) v4l2_common videodev v4l1_compat
media iovmm ipv6 libertas_sdio libertas lib80211 option usb_wwan
ads7846 usbserial iommu
CPU: 0 Not tainted (2.6.36+ #9)
PC is at iommu_get+0x74/0x108 [iommu]
LR is at iommu_get+0x78/0x108 [iommu]
pc : [<bf0009fc>] lr : [<bf000a00>] psr: 20000013
sp : ced33db0 ip : 22222222 fp : bf100bb8
r10: cdf48000 r9 : c0580938 r8 : 00000001
r7 : 000003ff r6 : ce78f218 r5 : 00000000 r4 : ce78f200
r3 : 00000000 r2 : ffffffd0 r1 : 22222222 r0 : ce78f200
Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
Control: 10c5387d Table: 8d4b0019 DAC: 00000015
Process modprobe (pid: 1327, stack limit = 0xced322f0)
Stack: (0xced33db0 to 0xced34000)
3da0: 0000000e 00000000 cdf48000
bf0f46a4
3dc0: 00000001 c01096c4 ce54e848 c0580940 00000000 ce6347c0 cec54a58
00000000
3de0: bf102adc c0580940 c0580940 bf102adc bf102adc c05a10d0 ced33f64
00000000
3e00: ced32000 c023d49c bf102adc c023c4dc ced33f64 c0580940 c0580974
bf102adc
3e20: ced33e38 c023c624 00000000 c023c5c4 bf102adc c023bcdc cec21cf8
cec4f5f0
3e40: c05a10d0 00000000 bf102adc bf102adc ce6347c0 c023b5b4 bf101bdb
cec02b88
3e60: cec02b80 00000000 00000018 bf102adc bf104974 bf10c000 00000000
c023c944
3e80: 00000000 00000018 00000000 bf104974 bf10c000 c00353c0 00000198
d12c0000
3ea0: 00000000 00000018 00000000 00000000 00000018 00000000 bf104974
00000000
3ec0: ced33f7c c0085860 00000000 00000000 cdc95c9c ced33f70 01a960e8
bf104980
3ee0: 000003dd d13fa11c d12c0000 00197522 d13f98fc d13f96e0 d1454c9c
cdd08000
3f00: 00011abc 00014b2c 00000000 00000000 00000034 00000035 0000001a
0000001e
3f20: 00000011 00000000 6e72656b 00006c65 00000000 00000000 00000000
00000000
3f40: 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000
3f60: 00000000 00000000 00000000 bf102174 00000003 00000000 00000000
c053b028
3f80: 00000073 00009720 00000000 00000000 00000080 c0036044 ced32000
01a96090
3fa0: 00000000 c0035ec0 00009720 00000000 40296000 00197522 01a960e8
01a960e8
3fc0: 00009720 00000000 00000000 00000080 00000000 01a9609c 01a96090
00000000
3fe0: 01a96120 beb95924 0000b180 40232084 60000010 40296000 00000000
00000000
[<bf0009fc>] (iommu_get+0x74/0x108 [iommu]) from [<bf0f46a4>]
(isp_probe+0x258/0x9f0 [omap3_isp])
[<bf0f46a4>] (isp_probe+0x258/0x9f0 [omap3_isp]) from [<c023d49c>]
(platform_drv_probe+0x1c/0x24)
[<c023d49c>] (platform_drv_probe+0x1c/0x24) from [<c023c4dc>]
(driver_probe_device+0xcc/0x1b4)
[<c023c4dc>] (driver_probe_device+0xcc/0x1b4) from [<c023c624>]
(__driver_attach+0x60/0x84)
[<c023c624>] (__driver_attach+0x60/0x84) from [<c023bcdc>]
(bus_for_each_dev+0x4c/0x8c)
[<c023bcdc>] (bus_for_each_dev+0x4c/0x8c) from [<c023b5b4>]
(bus_add_driver+0xa0/0x21c)
[<c023b5b4>] (bus_add_driver+0xa0/0x21c) from [<c023c944>]
(driver_register+0xbc/0x148)
[<c023c944>] (driver_register+0xbc/0x148) from [<c00353c0>]
(do_one_initcall+0xc8/0x194)
[<c00353c0>] (do_one_initcall+0xc8/0x194) from [<c0085860>]
(sys_init_module+0x13f8/0x15bc)
[<c0085860>] (sys_init_module+0x13f8/0x15bc) from [<c0035ec0>]
(ret_fast_syscall+0x0/0x30)
Code: e59f3098 e1a00004 e5933000 e1a0e00f (e593f004)
---[ end trace 7243c66244fbd250 ]---
overo Internal error: Oops: 17 [#1]
overo last sysfs file: /sys/devices/virtual/net/lo/type
overo Process modprobe (pid: 1327, stack limit = 0xced322f0)
overo Stack: (0xced33db0 to 0xced34000)
overo 3da0: 0000000e 00000000
cdf48000 bf0f46a4
overo 3dc0: 00000001 c01096c4 ce54e848 c0580940 00000000 ce6347c0
cec54a58 00000000
overo 3de0: bf102adc c0580940 c0580940 bf102adc bf102adc c05a10d0
ced33f64 00000000
overo 3e00: ced32000 c023d49c bf102adc c023c4dc ced33f64 c0580940
c0580974 bf102adc
overo 3e20: ced33e38 c023c624 00000000 c023c5c4 bf102adc c023bcdc
cec21cf8 cec4f5f0
overo 3e40: c05a10d0 00000000 bf102adc bf102adc ce6347c0 c023b5b4
bf101bdb cec02b88
overo 3e60: cec02b80 00000000 00000018 bf102adc bf104974 bf10c000
00000000 c023c944
overo 3e80: 00000000 00000018 00000000 bf104974 bf10c000 c00353c0
00000198 d12c0000
overo 3ea0: 00000000 00000018 00000000 00000000 00000018 00000000
bf104974 00000000
overo 3ec0: ced33f7c c0085860 00000000 00000000 cdc95c9c ced33f70
01a960e8 bf104980
overo 3ee0: 000003dd d13fa11c d12c0000 00197522 d13f98fc d13f96e0
d1454c9c cdd08000
overo 3f00: 00011abc 00014b2c 00000000 00000000 00000034 00000035
0000001a 0000001e
overo 3f20: 00000011 00000000 6e72656b 00006c65 00000000 00000000
00000000 00000000
overo 3f40: 00000000 00000000 00000000 00000000 00000000 00000000
00000000 00000000
overo 3f60: 00000000 00000000 00000000 bf102174 00000003 00000000
00000000 c053b028
overo 3f80: 00000073 00009720 00000000 00000000 00000080 c0036044
ced32000 01a96090
overo 3fa0: 00000000 c0035ec0 00009720 00000000 40296000 00197522
01a960e8 01a960e8
overo 3fc0: 00009720 00000000 00000000 00000080 00000000 01a9609c
01a96090 00000000
overo 3fe0: 01a96120 beb95924 0000b180 40232084 60000010 40296000
00000000 00000000
overo Code: e59f3098 e1a00004 e5933000 e1a0e00f (e593f004)
Segmentation fault
My ISP and MT9V032 code come from
http://git.linuxtv.org/pinchartl/media.git?a=shortlog;h=refs/heads/media-0006-sensors
and my board-overo.c (based on board-rx51.c) contains:
...
static int __init overo_i2c_init(void)
{
omap_register_i2c_bus(1, 2600, overo_i2c_boardinfo,
ARRAY_SIZE(overo_i2c_boardinfo));
/* i2c2 pins are used for gpio */
omap_register_i2c_bus(3, 400, NULL, 0);
return 0;
}
...
#include <media/mt9v032.h>
#include "devices.h"
#include "../../../drivers/media/video/isp/isp.h"
#include "../../../drivers/media/video/isp/ispreg.h"
#define MT9V032_I2C_BUS_NUM (0x03)
#define MT9V032_I2C_ADDR (0x5C)
#define MT9V032_XCLK (0x00)
static void mt9v032_set_clock(struct v4l2_subdev *subdev, unsigned
int rate)
{
struct isp_device *isp =
v4l2_dev_to_isp_device(subdev->v4l2_dev);
isp->platform_cb.set_xclk(isp, rate, MT9V032_XCLK);
}
static struct mt9v032_platform_data mt9v032_platform_data = {
.clk_pol = 0,
.set_clock = mt9v032_set_clock,
};
static struct i2c_board_info mt9v032_i2c_board_info[] = {
{
I2C_BOARD_INFO("mt9v032", MT9V032_I2C_ADDR),
.platform_data = &mt9v032_platform_data,
},
};
static struct isp_subdev_i2c_board_info pixhawk_camera_subdevs[] = {
{
.board_info = &mt9v032_i2c_board_info[0],
.i2c_adapter_id = MT9V032_I2C_BUS_NUM,
},
{ NULL, 0, },
};
static struct isp_v4l2_subdevs_group pixhawk_camera_subdevs_group[]
= {
{
.subdevs = pixhawk_camera_subdevs,
.interface = ISP_INTERFACE_PARALLEL,
.bus = { .parallel = {
.data_lane_shift = 0,
.clk_pol = 1,
.bridge = ISPCTRL_PAR_BRIDGE_DISABLE,
} },
},
{ NULL, 0, },
};
static struct isp_platform_data isp_platform_data = {
.subdevs = pixhawk_camera_subdevs_group,
};
static void __init overo_init(void)
{
overo_i2c_init();
if (omap3_init_camera(&isp_platform_data) < 0)
printk(KERN_WARNING "%s: Unable to register camera platform "
"device\n", __func__);
...
I've had this hardware working with older kernels but I'm trying to
make the conversion to the subdev api and a better driver (thanks
Laurent!). Anyone know what might be going on? This is my first
linux-media post so if I've commited any faux pas please let me know.
Thanks!
Neil
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