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drm/amd/display: use DisplayID panel type in dm_set_panel_type

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Wire up the newly parsed panel_type from drm_display_info into
amdgpu_dm's panel type detection path. When neither the AMD VSDB
nor DPCD determines the panel type, fall back to the DisplayID
Display Device Technology field to set PANEL_TYPE_LCD or
PANEL_TYPE_OLED accordingly. Also expose LCD to userspace via
the panel_type connector property.

Assisted-by: Copilot:Claude-Opus-4.6
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Link: https://patch.msgid.link/20260526030254.1460480-4-chen-yu.chen@amd.com
Signed-off-by: Mario Limonciello <superm1@kernel.org>
This commit is contained in:
Chenyu Chen
2026-05-26 10:59:51 +08:00
committed by Mario Limonciello
parent 1258f9c9ff
commit 723a2a698f
1 changed files with 11 additions and 5 deletions
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16
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@@ -3963,11 +3963,13 @@ static void dm_set_panel_type(struct amdgpu_dm_connector *aconnector)
link->panel_type = PANEL_TYPE_OLED;
}
/*
* TODO: get panel type from DID2 that has device technology field
* to specify if it's OLED or not. But we need to wait for DID2
* support in DC and EDID parser to be able to use it here.
*/
/* If VSDB and DPCD didn't determine panel type, check DID */
if (link->panel_type == PANEL_TYPE_NONE) {
if (display_info->panel_type == DRM_MODE_PANEL_TYPE_LCD)
link->panel_type = PANEL_TYPE_LCD;
else if (display_info->panel_type == DRM_MODE_PANEL_TYPE_OLED)
link->panel_type = PANEL_TYPE_OLED;
}
if (link->panel_type == PANEL_TYPE_NONE) {
struct drm_amd_vsdb_info *vsdb = &display_info->amd_vsdb;
@@ -3985,6 +3987,10 @@ static void dm_set_panel_type(struct amdgpu_dm_connector *aconnector)
drm_object_property_set_value(&connector->base,
adev_to_drm(adev)->mode_config.panel_type_property,
DRM_MODE_PANEL_TYPE_OLED);
else if (link->panel_type == PANEL_TYPE_LCD)
drm_object_property_set_value(&connector->base,
adev_to_drm(adev)->mode_config.panel_type_property,
DRM_MODE_PANEL_TYPE_LCD);
else
drm_object_property_set_value(&connector->base,
adev_to_drm(adev)->mode_config.panel_type_property,