From: jsg <jsg@openbsd.org>
Date: Mon, 22 Jan 2024 03:03:39 +0000 (+0000)
Subject: drm/amd/display: Add monitor patch for specific eDP
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=41450e3847e24b2b80c4ba5743dc13f54ac6b06c;p=openbsd

drm/amd/display: Add monitor patch for specific eDP

From Ivan Lipski
7fc3d8ea1a675eae9ee57dca894a9c4fb0e0d8b5 in linux-6.6.y/6.6.13
3d71a8726e05a35beb9de394e86ce896d69e563f in mainline linux
---

diff --git a/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index b0813138d77..cb0142f3a4d 100644
--- a/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -63,6 +63,12 @@ static void apply_edid_quirks(struct edid *edid, struct dc_edid_caps *edid_caps)
 		DRM_DEBUG_DRIVER("Disabling FAMS on monitor with panel id %X\n", panel_id);
 		edid_caps->panel_patch.disable_fams = true;
 		break;
+	/* Workaround for some monitors that do not clear DPCD 0x317 if FreeSync is unsupported */
+	case drm_edid_encode_panel_id('A', 'U', 'O', 0xA7AB):
+	case drm_edid_encode_panel_id('A', 'U', 'O', 0xE69B):
+		DRM_DEBUG_DRIVER("Clearing DPCD 0x317 on monitor with panel id %X\n", panel_id);
+		edid_caps->panel_patch.remove_sink_ext_caps = true;
+		break;
 	default:
 		return;
 	}