hi846 additions

some worthwhile fixes and changes that make the driver more similar to s5k3l6xx but still, taking photos using megapixels doesn't work for me :( (the on_frame() gtk callback isn't called there when taking a photo).

added 4 commits

• 525165c6 - hi846: fix mutex usage
• 0abf57b7 - hi846: remove frame interval callbacks and implement s_power
• a3414b75 - hi846: implement open() callback for internal ops
• e193b23b - hi846: add v4l2_ctrl_subdev_log_status callback to core ops

Compare with previous version

resolved all threads

added 5 commits

• 55e5d9c9 - hi846: remove frame interval callbacks and implement s_power
• 8b496a7b - hi846: implement open() callback for internal ops
• 2c1376b3 - hi846: add v4l2_ctrl_subdev_log_status callback to core ops
• f4fc72b5 - hi846: improve error output with errno values
• 395f9cdd - hi846: add hi846_regulator_disable()

Compare with previous version

havent tested but the diffstat looks nice!

added 9 commits

• 395f9cdd...73d36596 - 3 commits from branch Librem5:pureos/byzantium
• 91cbe225 - hi846: fix mutex usage
• ce502efe - hi846: remove frame interval callbacks and implement s_power
• ec3e0685 - hi846: implement open() callback for internal ops
• eb2f049c - hi846: add v4l2_ctrl_subdev_log_status callback to core ops
• a5df3771 - hi846: improve error output with errno values
• df9e4f9d - hi846: add hi846_regulator_disable()

Compare with previous version

resolved all threads

enabled an automatic merge when the pipeline for df9e4f9d succeeds

merged