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Groups > linux.kernel > #1294324 > unrolled thread
| Started by | Nish Aravamudan <nish.aravamudan@gmail.com> |
|---|---|
| First post | 2015-12-18 00:40 +0100 |
| Last post | 2015-12-18 03:00 +0100 |
| Articles | 11 — 3 participants |
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iio/hid-sensor-accel-3d: no output from /dev/iio:device*? Nish Aravamudan <nish.aravamudan@gmail.com> - 2015-12-18 00:40 +0100
Re: iio/hid-sensor-accel-3d: no output from /dev/iio:device*? Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2015-12-18 02:00 +0100
Re: iio/hid-sensor-accel-3d: no output from /dev/iio:device*? Nish Aravamudan <nish.aravamudan@gmail.com> - 2015-12-18 02:10 +0100
Re: iio/hid-sensor-accel-3d: no output from /dev/iio:device*? "Pandruvada, Srinivas" <srinivas.pandruvada@intel.com> - 2015-12-18 02:20 +0100
Re: iio/hid-sensor-accel-3d: no output from /dev/iio:device*? Nish Aravamudan <nish.aravamudan@gmail.com> - 2015-12-18 03:40 +0100
Re: iio/hid-sensor-accel-3d: no output from /dev/iio:device*? "Pandruvada, Srinivas" <srinivas.pandruvada@intel.com> - 2015-12-18 04:00 +0100
Re: iio/hid-sensor-accel-3d: no output from /dev/iio:device*? "Pandruvada, Srinivas" <srinivas.pandruvada@intel.com> - 2015-12-18 18:00 +0100
Re: iio/hid-sensor-accel-3d: no output from /dev/iio:device*? "Pandruvada, Srinivas" <srinivas.pandruvada@intel.com> - 2015-12-18 02:10 +0100
Re: iio/hid-sensor-accel-3d: no output from /dev/iio:device*? Nish Aravamudan <nish.aravamudan@gmail.com> - 2015-12-18 02:10 +0100
Re: iio/hid-sensor-accel-3d: no output from /dev/iio:device*? Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2015-12-18 02:20 +0100
Re: iio/hid-sensor-accel-3d: no output from /dev/iio:device*? Nish Aravamudan <nish.aravamudan@gmail.com> - 2015-12-18 03:00 +0100
| From | Nish Aravamudan <nish.aravamudan@gmail.com> |
|---|---|
| Date | 2015-12-18 00:40 +0100 |
| Subject | iio/hid-sensor-accel-3d: no output from /dev/iio:device*? |
| Message-ID | <qGQjo-6g4-21@gated-at.bofh.it> |
[Starting a new thread from https://lkml.org/lkml/2015/12/15/663, as now my laptop is displaying values in the sysfs *raw* files.] So I'm trying to understand exactly how the hid-sensor-accel-3d driver works. If I turn up debugging, when I `cat /sys/bus/iio/devices/device*/*raw*`, I see "iio iio:device3: accel_3d_proc_event" and I think that means that hid_sensor_push_data() is getting called. But read()'s on /dev/iio:device3 never produces anything, which is what iio-sensor-proxy uses to translate events to dbus. Is it expected that the dev-node is "silent"? Just trying to understand if an extension to the driver to support a chardev based output is appropriate, or if iio-sensor-proxy needs to be changed to handle this device. -Nish -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> |
|---|---|
| Date | 2015-12-18 02:00 +0100 |
| Message-ID | <qGRyO-6Zc-7@gated-at.bofh.it> |
| In reply to | #1294324 |
On Thu, 2015-12-17 at 15:38 -0800, Nish Aravamudan wrote: > [Starting a new thread from https://lkml.org/lkml/2015/12/15/663, as > now my laptop is displaying values in the sysfs *raw* files.] > > So I'm trying to understand exactly how the hid-sensor-accel-3d > driver works. > > If I turn up debugging, when I `cat > /sys/bus/iio/devices/device*/*raw*`, I see "iio iio:device3: > accel_3d_proc_event" and I think that means that > hid_sensor_push_data() is getting called. > > But read()'s on /dev/iio:device3 never produces anything, which is > what iio-sensor-proxy uses to translate events to dbus. > > Is it expected that the dev-node is "silent"? Just trying to > understand if an extension to the driver to support a chardev based > output is appropriate, or if iio-sensor-proxy needs to be changed to > handle this device. You are saying there is some regression. This used to work and now it doesn't work. Is raw values are displayed correctly, when you do "cat"? If cat of raw values is working then power on of sensors is working. Turn on HID debug prints. If it is regression we can do git bisect. Any ACPI or PM changes can break this. Usually there will be GPIOs which will be involved in power on, where ACPI comes into play. This will be done by i2c-hid. There are some prints in i2c-hid which can be enabled also. Thanks, Srinivas > > -Nish -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Nish Aravamudan <nish.aravamudan@gmail.com> |
|---|---|
| Date | 2015-12-18 02:10 +0100 |
| Message-ID | <qGRIu-7hG-7@gated-at.bofh.it> |
| In reply to | #1294365 |
On Thu, Dec 17, 2015 at 5:00 PM, Pandruvada, Srinivas <srinivas.pandruvada@intel.com> wrote: > Hi Andy, > > As per Nish these patches are impacting sensors on Yoga. > https://lkml.org/lkml/2015/11/30/441 To be clear, without that series, the touchpad and touchscreen on the Yoga 900 don't work at all. So they are necessary for functioning. I don't know (I will test it now), if removing the series makes the IIO sensors work properly in /dev/. -Nish > On Thu, 2015-12-17 at 16:51 -0800, Srinivas Pandruvada wrote: >> On Thu, 2015-12-17 at 15:38 -0800, Nish Aravamudan wrote: >> > [Starting a new thread from https://lkml.org/lkml/2015/12/15/663, >> > as >> > now my laptop is displaying values in the sysfs *raw* files.] >> > >> > So I'm trying to understand exactly how the hid-sensor-accel-3d >> > driver works. >> > >> > If I turn up debugging, when I `cat >> > /sys/bus/iio/devices/device*/*raw*`, I see "iio iio:device3: >> > accel_3d_proc_event" and I think that means that >> > hid_sensor_push_data() is getting called. >> > >> > But read()'s on /dev/iio:device3 never produces anything, which is >> > what iio-sensor-proxy uses to translate events to dbus. >> > >> > Is it expected that the dev-node is "silent"? Just trying to >> > understand if an extension to the driver to support a chardev based >> > output is appropriate, or if iio-sensor-proxy needs to be changed >> > to >> > handle this device. >> >> You are saying there is some regression. This used to work and now it >> doesn't work. Is raw values are displayed correctly, when you do >> "cat"? >> If cat of raw values is working then power on of sensors is working. >> >> Turn on HID debug prints. If it is regression we can do git bisect. >> Any ACPI or PM changes can break this. Usually there will be GPIOs >> which will be involved in power on, where ACPI comes into play. This >> will be done by i2c-hid. There are some prints in i2c-hid which can >> be >> enabled also. >> >> Thanks, >> Srinivas >> >> > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | "Pandruvada, Srinivas" <srinivas.pandruvada@intel.com> |
|---|---|
| Date | 2015-12-18 02:20 +0100 |
| Message-ID | <qGRS9-7kZ-1@gated-at.bofh.it> |
| In reply to | #1294367 |
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| From | Nish Aravamudan <nish.aravamudan@gmail.com> |
|---|---|
| Date | 2015-12-18 03:40 +0100 |
| Message-ID | <qGT7z-81l-1@gated-at.bofh.it> |
| In reply to | #1294371 |
On Thu, Dec 17, 2015 at 5:11 PM, Pandruvada, Srinivas <srinivas.pandruvada@intel.com> wrote: > On Thu, 2015-12-17 at 17:08 -0800, Nish Aravamudan wrote: >> On Thu, Dec 17, 2015 at 5:00 PM, Pandruvada, Srinivas >> <srinivas.pandruvada@intel.com> wrote: >> > Hi Andy, >> > >> > As per Nish these patches are impacting sensors on Yoga. >> > https://lkml.org/lkml/2015/11/30/441 >> >> To be clear, without that series, the touchpad and touchscreen on the >> Yoga 900 don't work at all. So they are necessary for functioning. I >> don't know (I will test it now), if removing the series makes the IIO >> sensors work properly in /dev/. > This is important to know before we take Andy's time. It seems like Andy's patches are not the problem. That is, with stock 4.4-rc5, the accelerommeter /dev files still do not update. -Nish -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | "Pandruvada, Srinivas" <srinivas.pandruvada@intel.com> |
|---|---|
| Date | 2015-12-18 04:00 +0100 |
| Message-ID | <qGTqW-885-7@gated-at.bofh.it> |
| In reply to | #1294402 |
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| From | "Pandruvada, Srinivas" <srinivas.pandruvada@intel.com> |
|---|---|
| Date | 2015-12-18 18:00 +0100 |
| Message-ID | <qH6xQ-8aD-5@gated-at.bofh.it> |
| In reply to | #1294413 |
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| From | "Pandruvada, Srinivas" <srinivas.pandruvada@intel.com> |
|---|---|
| Date | 2015-12-18 02:10 +0100 |
| Message-ID | <qGRIu-7hG-9@gated-at.bofh.it> |
| In reply to | #1294365 |
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| From | Nish Aravamudan <nish.aravamudan@gmail.com> |
|---|---|
| Date | 2015-12-18 02:10 +0100 |
| Message-ID | <qGRIu-7hG-13@gated-at.bofh.it> |
| In reply to | #1294365 |
On Thu, Dec 17, 2015 at 4:51 PM, Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> wrote: > On Thu, 2015-12-17 at 15:38 -0800, Nish Aravamudan wrote: >> [Starting a new thread from https://lkml.org/lkml/2015/12/15/663, as >> now my laptop is displaying values in the sysfs *raw* files.] >> >> So I'm trying to understand exactly how the hid-sensor-accel-3d >> driver works. >> >> If I turn up debugging, when I `cat >> /sys/bus/iio/devices/device*/*raw*`, I see "iio iio:device3: >> accel_3d_proc_event" and I think that means that >> hid_sensor_push_data() is getting called. >> >> But read()'s on /dev/iio:device3 never produces anything, which is >> what iio-sensor-proxy uses to translate events to dbus. >> >> Is it expected that the dev-node is "silent"? Just trying to >> understand if an extension to the driver to support a chardev based >> output is appropriate, or if iio-sensor-proxy needs to be changed to >> handle this device. > > You are saying there is some regression. This used to work and now it > doesn't work. Is raw values are displayed correctly, when you do "cat"? > If cat of raw values is working then power on of sensors is working. Sorry, I was unclear. I don't know if this is a regression. I can try going back to an older kernel to see if the /dev/iio:device* files produced any output. Yes, the *raw* files in sysfs are producing output, that is changing as I move the laptop around. But the /dev/ nodes seem to produce no output (I'm still reading through the driver code to understand where that data should be coming from. > Turn on HID debug prints. If it is regression we can do git bisect. > Any ACPI or PM changes can break this. Usually there will be GPIOs > which will be involved in power on, where ACPI comes into play. This > will be done by i2c-hid. There are some prints in i2c-hid which can be > enabled also. Ok, I will try this, as well. -Nish -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> |
|---|---|
| Date | 2015-12-18 02:20 +0100 |
| Message-ID | <qGRS9-7kZ-7@gated-at.bofh.it> |
| In reply to | #1294370 |
On Thu, 2015-12-17 at 17:07 -0800, Nish Aravamudan wrote: > On Thu, Dec 17, 2015 at 4:51 PM, Srinivas Pandruvada > <srinivas.pandruvada@linux.intel.com> wrote: > > On Thu, 2015-12-17 at 15:38 -0800, Nish Aravamudan wrote: > > > [Starting a new thread from https://lkml.org/lkml/2015/12/15/663, > > > as > > > now my laptop is displaying values in the sysfs *raw* files.] > > > > > > So I'm trying to understand exactly how the hid-sensor-accel-3d > > > driver works. > > > > > > If I turn up debugging, when I `cat > > > /sys/bus/iio/devices/device*/*raw*`, I see "iio iio:device3: > > > accel_3d_proc_event" and I think that means that > > > hid_sensor_push_data() is getting called. > > > > > > But read()'s on /dev/iio:device3 never produces anything, which > > > is > > > what iio-sensor-proxy uses to translate events to dbus. > > > > > > Is it expected that the dev-node is "silent"? Just trying to > > > understand if an extension to the driver to support a chardev > > > based > > > output is appropriate, or if iio-sensor-proxy needs to be changed > > > to > > > handle this device. > > > > You are saying there is some regression. This used to work and now > > it > > doesn't work. Is raw values are displayed correctly, when you do > > "cat"? > > If cat of raw values is working then power on of sensors is > > working. > > Sorry, I was unclear. I don't know if this is a regression. I can try > going back to an older kernel to see if the /dev/iio:device* files > produced any output. > > Yes, the *raw* files in sysfs are producing output, that is changing > as I move the laptop around. But the /dev/ nodes seem to produce no > output (I'm still reading through the driver code to understand where > that data should be coming from. > > > Turn on HID debug prints. If it is regression we can do git bisect. > > Any ACPI or PM changes can break this. Usually there will be GPIOs > > which will be involved in power on, where ACPI comes into play. > > This > > will be done by i2c-hid. There are some prints in i2c-hid which can > > be > > enabled also. > > Ok, I will try this, as well. > Try increasing in_accel_sampling_frequency echo 100 > in_accel_sampling_frequency Adjust hysteresis to a low value echo 0 > in_accel_hysteresis These values are very vendor specific. Thanks, Srinivas > -Nish -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Nish Aravamudan <nish.aravamudan@gmail.com> |
|---|---|
| Date | 2015-12-18 03:00 +0100 |
| Message-ID | <qGSuS-7xL-5@gated-at.bofh.it> |
| In reply to | #1294376 |
On Thu, Dec 17, 2015 at 5:16 PM, Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> wrote: > On Thu, 2015-12-17 at 17:07 -0800, Nish Aravamudan wrote: >> On Thu, Dec 17, 2015 at 4:51 PM, Srinivas Pandruvada >> <srinivas.pandruvada@linux.intel.com> wrote: >> > On Thu, 2015-12-17 at 15:38 -0800, Nish Aravamudan wrote: >> > > [Starting a new thread from https://lkml.org/lkml/2015/12/15/663, >> > > as >> > > now my laptop is displaying values in the sysfs *raw* files.] >> > > >> > > So I'm trying to understand exactly how the hid-sensor-accel-3d >> > > driver works. >> > > >> > > If I turn up debugging, when I `cat >> > > /sys/bus/iio/devices/device*/*raw*`, I see "iio iio:device3: >> > > accel_3d_proc_event" and I think that means that >> > > hid_sensor_push_data() is getting called. >> > > >> > > But read()'s on /dev/iio:device3 never produces anything, which >> > > is >> > > what iio-sensor-proxy uses to translate events to dbus. >> > > >> > > Is it expected that the dev-node is "silent"? Just trying to >> > > understand if an extension to the driver to support a chardev >> > > based >> > > output is appropriate, or if iio-sensor-proxy needs to be changed >> > > to >> > > handle this device. >> > >> > You are saying there is some regression. This used to work and now >> > it >> > doesn't work. Is raw values are displayed correctly, when you do >> > "cat"? >> > If cat of raw values is working then power on of sensors is >> > working. >> >> Sorry, I was unclear. I don't know if this is a regression. I can try >> going back to an older kernel to see if the /dev/iio:device* files >> produced any output. >> >> Yes, the *raw* files in sysfs are producing output, that is changing >> as I move the laptop around. But the /dev/ nodes seem to produce no >> output (I'm still reading through the driver code to understand where >> that data should be coming from. >> >> > Turn on HID debug prints. If it is regression we can do git bisect. >> > Any ACPI or PM changes can break this. Usually there will be GPIOs >> > which will be involved in power on, where ACPI comes into play. >> > This >> > will be done by i2c-hid. There are some prints in i2c-hid which can >> > be >> > enabled also. >> >> Ok, I will try this, as well. >> > > Try increasing in_accel_sampling_frequency > echo 100 > in_accel_sampling_frequency > Adjust hysteresis to a low value > echo 0 > in_accel_hysteresis > These values are very vendor specific. Adjusting the values in this way didn't seem to make any difference. Also, `cat in_accel_hysteresis` gave EINVAL, but I was able to echo 0 to it. -Nish -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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