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: Detect panel type from VSDB

Browse Source 
[Why]
The AMD VSDB contains two bits that indicate the type of panel connected.
This can be useful for policy decisions based upon panel technology.

[How]
Read the bits for the panel type when parsing VSDB and store them in
the dc_link.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Matthew Stewart <matthew.stewart2@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Mario Limonciello (AMD)
2026-01-05 21:52:48 -06:00
committed by Alex Deucher
parent 8cee62904c
commit 0a62732e53
4 changed files with 34 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
View File

@@ -13146,9 +13146,24 @@ static int parse_amd_vsdb(struct amdgpu_dm_connector *aconnector,
if (ieeeId == HDMI_AMD_VENDOR_SPECIFIC_DATA_BLOCK_IEEE_REGISTRATION_ID &&
amd_vsdb->version == HDMI_AMD_VENDOR_SPECIFIC_DATA_BLOCK_VERSION_3) {
u8 panel_type;
vsdb_info->replay_mode = (amd_vsdb->feature_caps & AMD_VSDB_VERSION_3_FEATURECAP_REPLAYMODE) ? true : false;
vsdb_info->amd_vsdb_version = HDMI_AMD_VENDOR_SPECIFIC_DATA_BLOCK_VERSION_3;
drm_dbg_kms(aconnector->base.dev, "Panel supports Replay Mode: %d\n", vsdb_info->replay_mode);
panel_type = (amd_vsdb->color_space_eotf_support & AMD_VDSB_VERSION_3_PANEL_TYPE_MASK) >> AMD_VDSB_VERSION_3_PANEL_TYPE_SHIFT;
switch (panel_type) {
case AMD_VSDB_PANEL_TYPE_OLED:
aconnector->dc_link->panel_type = PANEL_TYPE_OLED;
break;
case AMD_VSDB_PANEL_TYPE_MINILED:
aconnector->dc_link->panel_type = PANEL_TYPE_MINILED;
break;
default:
aconnector->dc_link->panel_type = PANEL_TYPE_NONE;
break;
}
drm_dbg_kms(aconnector->base.dev, "Panel type: %d\n",
aconnector->dc_link->panel_type);
return true;
}