This series adds support for the standalone cat24c208 EDID EEPROM i2c device. Usually EDID support is part of an HDMI receiver, but this is a standalone EEPROM. Note that EEPROMs for EDIDs are not regular EEPROM devices, these are dual port devices that follow the VESA E-DDC standard. Since this is a standalone device that does not capture any video a new V4L2_CAP_EDID_MEMORY capability is introduced to represent such devices. Note that such a device doesn't have to be an EEPROM, it can also be implemented using a microcontroller, for example. Hence the use of the generic word 'MEMORY'. The new capability uses the free bit 0x00000008. But we are running out of capability bits: only 0x40000000 and 0x00000008 are free at the moment. There is one other capability V4L2_CAP_ASYNCIO (0x02000000) that is not used at all, it was never implemented. Wouldn't it be better to define V4L2_CAP_ASYNCIO to 0, mark it as obsolete, and instead reuse it for this V4L2_CAP_EDID_MEMORY capability? Erling Ljunggren (4): media: videodev2.h: add V4L2_CAP_EDID_MEMORY media: docs: Add V4L2_CAP_EDID_MEMORY dt-bindings: media: add cat24c208 bindings media: v4l2-dev: handle V4L2_CAP_EDID_MEMORY Jonathan Selnes (1): media: i2c: cat24c208: driver for the cat24c208 EDID EEPROM .../bindings/media/i2c/onnn,cat24c208.yaml | 40 ++ .../userspace-api/media/v4l/biblio.rst | 11 + .../media/v4l/vidioc-querycap.rst | 7 + .../media/videodev2.h.rst.exceptions | 1 + MAINTAINERS | 7 + drivers/media/i2c/Kconfig | 9 + drivers/media/i2c/Makefile | 1 + drivers/media/i2c/cat24c208.c | 421 ++++++++++++++++++ drivers/media/v4l2-core/v4l2-dev.c | 8 + include/uapi/linux/videodev2.h | 1 + 10 files changed, 506 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/i2c/onnn,cat24c208.yaml create mode 100644 drivers/media/i2c/cat24c208.c -- 2.37.1
