Second attempt at implementing a module that allows reading/writing arbitrary
dpcd registers. Changes to this version:
- lseek is used to select the register to read/write;
- read/write are used instead of ioctl;
- no blocking_notifier is used, just a direct callback.
One thing to notice is that I am not updating the file offset during read or
write, which is kind of breaking the filesystem abstraction. But i2c-dev
doesn't do it either, so I assumed it's fine.
Rafael Antognolli (3):
drm/dp: Keep a list of drm_dp_aux helper.
drm/dp: Store the drm_connector device pointer on the helper.
drm/dp: Add a drm_aux-dev module for reading/writing dpcd registers.
drivers/gpu/drm/Kconfig | 4 +
drivers/gpu/drm/Makefile | 1 +
drivers/gpu/drm/drm_aux-dev.c | 326 ++++++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/drm_dp_helper.c | 73 +++++++++
drivers/gpu/drm/i915/intel_dp.c | 1 +
include/drm/drm_dp_helper.h | 6 +
6 files changed, 411 insertions(+)
create mode 100644 drivers/gpu/drm/drm_aux-dev.c
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2.4.3
