Track a connector's physical status separately from the logical status and implement BMC support for DRM drivers. Connectors with virtual BMC stay connected even if no display is physically connected. DRM clients then continue displaying output to the BMC. Ast and mgag200 have been doing this for a while. Moving this into struct drm_connector and probe helpers simplifies htese divers and makes the functionality available to others. Hibmc is a candidate here. Patch just simplifies code in probe helpers and has been acked as part of the series at [1]. Pathces 2 and 3 add the physical status and a BMC flag to struct drm_connector. Usually physical connector status and regular, logical status are in sync, so nothing changes for most drivers. If the the BMC flag has been set, the logical status is always connected. The probe helpers also take care of sending hotplug events if the physical status changes. Patches 4 to 7 update ast and mgag200. Both drivers already implement their own tracking of physical status, which is now handled by DRM helpers. Ast also receives two simple bug fixes for cleaning up EDID properties in the BMC case. Tested on ast and mgag200 hardware. Another driver that could make use of this functionality is hibmc. [1] https://patchwork.freedesktop.org/series/136084/ Thomas Zimmermann (7): drm/probe-helper: Call connector detect functions in single helper drm: Add physical status to connector drm: Add bmc_attached flag to connector drm/ast: sil164: Clear EDID if no display is connected drm/ast: vga: Clear EDID if no display is connected drm/ast: Track physical connector status in struct drm_connector drm/mgag200: Track physical connector status in struct drm_connector drivers/gpu/drm/ast/ast_dp.c | 21 +++------- drivers/gpu/drm/ast/ast_dp501.c | 17 ++------ drivers/gpu/drm/ast/ast_drv.h | 24 ++--------- drivers/gpu/drm/ast/ast_sil164.c | 19 +++------ drivers/gpu/drm/ast/ast_vga.c | 30 +++----------- drivers/gpu/drm/drm_connector.c | 1 + drivers/gpu/drm/drm_probe_helper.c | 50 +++++++++++++---------- drivers/gpu/drm/mgag200/mgag200_vga_bmc.c | 32 +++------------ include/drm/drm_connector.h | 15 +++++++ 9 files changed, 77 insertions(+), 132 deletions(-) -- 2.46.0
