This is a series of patches to add output of raw touch diagnostic data via V4L2
to the Atmel maXTouch and Synaptics RMI4 drivers.
It's a rewrite of the previous implementation which output via debugfs: it now
uses a V4L2 device in a similar way to the sur40 driver.
We have a utility which can read the data and display it in a useful format:
https://github.com/ndyer/heatmap/commits/heatmap-v4l
These patches are also available from
https://github.com/ndyer/linux/commits/v4l-touch-2016-06-30
I will also send a patch to update v4l2-compliance.
Changes in v6:
- Remove BUF_TYPE_TOUCH_CAPTURE, as discussed with Hans V touch devices will
use BUF_TYPE_VIDEO_CAPTURE.
- Touch devices should now register CAP_VIDEO_CAPTURE: CAP_TOUCH just says that
this is a touch device, not a video device, but otherwise it acts the same.
- Add some code to v4l_s_fmt() to set sensible default values for fields not
used by touch.
- Improve naming/doc of RMI4 F54 report types.
- Various minor DocBook fixes, and split to separate patch.
- Update my email address.
- Rework sur40 changes so that PIX_FMT_GREY is supported for backward
compatibility. Florian is it possible for you to test?
Changes in v5 (Hans Verkuil review):
- Update v4l2-core:
- Add VFL_TYPE_TOUCH, V4L2_BUF_TYPE_TOUCH_CAPTURE and V4L2_CAP_TOUCH
- Change V4L2_INPUT_TYPE_TOUCH_SENSOR to V4L2_INPUT_TYPE_TOUCH
- Improve DocBook documentation
- Add FMT definitions for touch data
- Note this will need the latest version of the heatmap util
- Synaptics RMI4 driver:
- Remove some less important non full frame report types
- Switch report type names to const char * array
- Move a static array to inside context struct
- Split sur40 changes to a separate commit
Changes in v4:
- Address nits from the input side in atmel_mxt_ts patches (Dmitry Torokhov)
- Add Synaptics RMI4 F54 support patch
Changes in v3:
- Address V4L2 review comments from Hans Verkuil
- Run v4l-compliance and fix all issues - needs minor patch here:
https://github.com/ndyer/v4l-utils/commit/cf50469773f
Changes in v2:
- Split pixfmt changes into separate commit and add DocBook
- Introduce VFL_TYPE_TOUCH_SENSOR and /dev/v4l-touch
- Remove "single node" support for now, it may be better to treat it as
metadata later
- Explicitly set VFL_DIR_RX
- Fix Kconfig
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