Some dual graphics machines support muxing the DDC separately from the
display, so make use of this functionality when reading the EDID on the
inactive GPU. Also serialize drm_get_edid() with a mutex to avoid races
on the DDC mux state.
Signed-off-by: Seth Forshee
---
drivers/gpu/drm/drm_edid.c
Some dual graphics machines support muxing the DDC separately from the
display, so make use of this functionality when reading the EDID on the
inactive GPU. Also serialize drm_get_edid() with a mutex to avoid races
on the DDC mux state.
Signed-off-by: Seth Forshee
---
drivers/gpu/drm/drm_edid.c
