• Jonathan Liu's avatar
    drm/sun4i: hdmi: Implement I2C adapter for A10s DDC bus · f0a3dd33
    Jonathan Liu authored
    The documentation for drm_do_get_edid in drivers/gpu/drm/drm_edid.c states:
    "As in the general case the DDC bus is accessible by the kernel at the I2C
    level, drivers must make all reasonable efforts to expose it as an I2C
    adapter and use drm_get_edid() instead of abusing this function."
    
    Exposing the DDC bus as an I2C adapter is more beneficial as it can be used
    for purposes other than reading the EDID such as modifying the EDID or
    using the HDMI DDC pins as an I2C bus through the I2C dev interface from
    userspace (e.g. i2c-tools).
    
    Implement this for A10s.
    Signed-off-by: default avatarJonathan Liu <net147@gmail.com>
    Signed-off-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
    f0a3dd33
sun4i_hdmi.h 6.22 KB