git/linux-net
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/ synced 2026-04-18 06:33:43 -04:00
Code Issues Packages Projects Releases Wiki Activity

drm/amd/display: Refactor amdgpu_dm_connector_detect (v2)

Browse Source 
Prepare for polling analog connectors.
Document the function better.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Timur Kristóf
2025-09-26 20:01:55 +02:00
committed by Alex Deucher
parent e45d60a769
commit 8223a60574
1 changed files with 19 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
View File

@@ -7226,29 +7226,32 @@ finish:
return stream;
}
/**
* amdgpu_dm_connector_detect() - Detect whether a DRM connector is connected to a display
*
* A connector is considered connected when it has a sink that is not NULL.
* For connectors that support HPD (hotplug detection), the connection is
* handled in the HPD interrupt.
*
* Notes:
* 1. This interface is NOT called in context of HPD irq.
* 2. This interface *is called* in context of user-mode ioctl. Which
* makes it a bad place for *any* MST-related activity.
*/
static enum drm_connector_status
amdgpu_dm_connector_detect(struct drm_connector *connector, bool force)
{
bool connected;
struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
/*
* Notes:
* 1. This interface is NOT called in context of HPD irq.
* 2. This interface *is called* in context of user-mode ioctl. Which
* makes it a bad place for *any* MST-related activity.
*/
if (aconnector->base.force == DRM_FORCE_UNSPECIFIED &&
!aconnector->fake_enable)
connected = (aconnector->dc_sink != NULL);
else
connected = (aconnector->base.force == DRM_FORCE_ON ||
aconnector->base.force == DRM_FORCE_ON_DIGITAL);
update_subconnector_property(aconnector);
return (connected ? connector_status_connected :
if (aconnector->base.force == DRM_FORCE_ON ||
aconnector->base.force == DRM_FORCE_ON_DIGITAL)
return connector_status_connected;
else if (aconnector->base.force == DRM_FORCE_OFF)
return connector_status_disconnected;
return (aconnector->dc_sink ? connector_status_connected :
connector_status_disconnected);
}