Merge tag 'drm-intel-fixes-2025-09-25' of https://gitlab.freedesktop.org/drm/i915/kernel into drm-fixes

- Set O_LARGEFILE in __create_shmem() (Taotao Chen)
- Guard reg_val against a INVALID_TRANSCODER [ddi] (Suraj Kandpal)

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Tvrtko Ursulin <tursulin@igalia.com>
Link: https://lore.kernel.org/r/aNTxWfhsMkFZ3Q-a@linux

Author: airlied

drivers/gpu/drm/i915/display/intel_ddi.c

@@ -596,8 +596,9 @@ intel_ddi_transcoder_func_reg_val_get(struct intel_encoder *encoder,
 			enum transcoder master;
 
 			master = crtc_state->mst_master_transcoder;
-			drm_WARN_ON(display->drm,
-				    master == INVALID_TRANSCODER);
+			if (drm_WARN_ON(display->drm,
+					master == INVALID_TRANSCODER))
+				master = TRANSCODER_A;
 			temp |= TRANS_DDI_MST_TRANSPORT_SELECT(master);
 		}
 	} else {

drivers/gpu/drm/i915/gem/i915_gem_shmem.c

@@ -514,6 +514,13 @@ static int __create_shmem(struct drm_i915_private *i915,
 	if (IS_ERR(filp))
 		return PTR_ERR(filp);
 
+	/*
+	 * Prevent -EFBIG by allowing large writes beyond MAX_NON_LFS on shmem
+	 * objects by setting O_LARGEFILE.
+	 */
+	if (force_o_largefile())
+		filp->f_flags |= O_LARGEFILE;
+
 	obj->filp = filp;
 	return 0;
 }