Merge tag 'amd-drm-fixes-6.18-2025-10-22' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes

amd-drm-fixes-6.18-2025-10-22:

amdgpu:
- DP MST fix
- Fix DC max link count
- DC interrupt atomic context fix

Signed-off-by: Simona Vetter <[email protected]>

From: Alex Deucher <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: danvet

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -551,13 +551,13 @@ static void schedule_dc_vmin_vmax(struct amdgpu_device *adev,
 	struct dc_stream_state *stream,
 	struct dc_crtc_timing_adjust *adjust)
 {
-	struct vupdate_offload_work *offload_work = kzalloc(sizeof(*offload_work), GFP_KERNEL);
+	struct vupdate_offload_work *offload_work = kzalloc(sizeof(*offload_work), GFP_NOWAIT);
 	if (!offload_work) {
 		drm_dbg_driver(adev_to_drm(adev), "Failed to allocate vupdate_offload_work\n");
 		return;
 	}
 
-	struct dc_crtc_timing_adjust *adjust_copy = kzalloc(sizeof(*adjust_copy), GFP_KERNEL);
+	struct dc_crtc_timing_adjust *adjust_copy = kzalloc(sizeof(*adjust_copy), GFP_NOWAIT);
 	if (!adjust_copy) {
 		drm_dbg_driver(adev_to_drm(adev), "Failed to allocate adjust_copy\n");
 		kfree(offload_work);

drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c

@@ -200,6 +200,9 @@ void dcn401_init_hw(struct dc *dc)
 		 */
 		struct dc_link *link = dc->links[i];
 
+		if (link->ep_type != DISPLAY_ENDPOINT_PHY)
+			continue;
+
 		link->link_enc->funcs->hw_init(link->link_enc);
 
 		/* Check for enabled DIG to identify enabled display */

drivers/gpu/drm/amd/display/dc/inc/hw/hw_shared.h

@@ -44,7 +44,13 @@
  */
 #define MAX_PIPES 6
 #define MAX_PHANTOM_PIPES (MAX_PIPES / 2)
-#define MAX_LINKS (MAX_PIPES * 2 +2)
+
+#define MAX_DPIA 6
+#define MAX_CONNECTOR 6
+#define MAX_VIRTUAL_LINKS 4
+
+#define MAX_LINKS (MAX_DPIA + MAX_CONNECTOR + MAX_VIRTUAL_LINKS)
+
 #define MAX_DIG_LINK_ENCODERS 7
 #define MAX_DWB_PIPES	1
 #define MAX_HPO_DP2_ENCODERS	4

drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c

@@ -78,6 +78,7 @@ static void dp_retrain_link_dp_test(struct dc_link *link,
 	struct audio_output audio_output[MAX_PIPES];
 	struct dc_stream_state *streams_on_link[MAX_PIPES];
 	int num_streams_on_link = 0;
+	struct dc *dc = (struct dc *)link->dc;
 
 	needs_divider_update = (link->dc->link_srv->dp_get_encoding_format(link_setting) !=
 	link->dc->link_srv->dp_get_encoding_format((const struct dc_link_settings *) &link->cur_link_settings));
@@ -150,7 +151,7 @@ static void dp_retrain_link_dp_test(struct dc_link *link,
 		if (streams_on_link[i] && streams_on_link[i]->link && streams_on_link[i]->link == link) {
 			stream_update.stream = streams_on_link[i];
 			stream_update.dpms_off = &dpms_off;
-			dc_update_planes_and_stream(state->clk_mgr->ctx->dc, NULL, 0, streams_on_link[i], &stream_update);
+			dc_update_planes_and_stream(dc, NULL, 0, streams_on_link[i], &stream_update);
 		}
 	}
 }