Merge tag 'drm-misc-next-2025-04-09' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

drm-misc-next for v6.16-rc1:

UAPI Changes:
- Add ASAHI uapi header!
- Add apple fourcc modifiers.
- Add capset virtio definitions to UAPI.
- Extend EXPORT_SYNC_FILE for timeline syncobjs.

Cross-subsystem Changes:
- Adjust DMA-BUF sg handling to not cache map on attach.
- Update drm/ci, hlcdc, virtio, maintainers.
- Update fbdev todo.
- Allow setting dma-device for dma-buf import.
- Export efi_mem_desc_lookup to make efidrm build as a module.

Core Changes:
- Update drm scheduler docs.
- Use the correct resv object in TTM delayed destroy.
- Fix compiler warning with panic qr code, and other small fixes.
- drm/ci updates.
- Add debugfs file for listing all bridges.
- Small fixes to drm/client, ttm tests.
- Add documentation to display/hdmi.
- Add kunit tests for bridges.
- Dont fail managed device probing if connector polling fails.
- Create Kconfig.debug for drm core.
- Add tests for the drm scheduler.
- Add and use new access helpers for DPCPD.
- Add generic and optimized conversions for format-helper.
- Begin refcounting panel for improving lifetime handling.
- Unify simpledrm and ofdrm sysfb, and add extra features.
- Split hdmi audio in bridge to make DP audio work.

Driver Changes:
- Convert drivers to use devm_platform_ioremap_resource().
- Assorted small fixes to imx/legacy-bridg, gma500, pl111, nouveau, vc4,
  vmwgfx, ast, mxsfb, xlnx, accel/qaic, v3d, bridge/imx8qxp-ldb, ofdrm,
  bridge/fsl-ldb, udl, bridge/ti-sn65dsi86, bridge/anx7625, cirrus-qemu,
  bridge/cdns-dsi, panel/sharp, panel/himax, bridge/sil902x, renesas,
  imagination, various panels.
- Allow attaching more display to vkms.
- Add Powertip PH128800T004-ZZA01 panel.
- Add rotation quirk for ZOTAC panel.
- Convert bridge/tc358775 to atomic.
- Remove deprecated panel calls from synaptics, novatek, samsung panels.
- Refactor shmem helper page pinning and accel drivers using it.
- Add dmabuf support to accel/amdxdna.
- Use 4k page table format for panfrost/mediatek.
- Add common powerup/down dp link helper and use it.
- Assorted compiler warning fixes.
- Support dma-buf import for renesas

Signed-off-by: Dave Airlie <airlied@redhat.com>

# Conflicts:
#	include/drm/drm_kunit_helpers.h
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://lore.kernel.org/r/e147ff95-697b-4067-9e2e-7cbd424e162a@linux.intel.com

1 files changed, 59 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 9ea2611770f4..0138cf0b8b63 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -933,6 +933,9 @@ EXPORT_SYMBOL(drm_atomic_get_new_private_obj_state);
  * state). This is especially true in enable hooks because the pipeline has
  * changed.
  *
+ * If you don't have access to the atomic state, see
+ * drm_atomic_get_connector_for_encoder().
+ *
  * Returns: The old connector connected to @encoder, or NULL if the encoder is
  * not connected.
  */
@@ -967,6 +970,9 @@ EXPORT_SYMBOL(drm_atomic_get_old_connector_for_encoder);
  * attached to @encoder vs ones that do (and to inspect their state). This is
  * especially true in disable hooks because the pipeline will change.
  *
+ * If you don't have access to the atomic state, see
+ * drm_atomic_get_connector_for_encoder().
+ *
  * Returns: The new connector connected to @encoder, or NULL if the encoder is
  * not connected.
  */
@@ -988,6 +994,59 @@ drm_atomic_get_new_connector_for_encoder(const struct drm_atomic_state *state,
 EXPORT_SYMBOL(drm_atomic_get_new_connector_for_encoder);
 
 /**
+ * drm_atomic_get_connector_for_encoder - Get connector currently assigned to an encoder
+ * @encoder: The encoder to find the connector of
+ * @ctx: Modeset locking context
+ *
+ * This function finds and returns the connector currently assigned to
+ * an @encoder.
+ *
+ * It is similar to the drm_atomic_get_old_connector_for_encoder() and
+ * drm_atomic_get_new_connector_for_encoder() helpers, but doesn't
+ * require access to the atomic state. If you have access to it, prefer
+ * using these. This helper is typically useful in situations where you
+ * don't have access to the atomic state, like detect, link repair,
+ * threaded interrupt handlers, or hooks from other frameworks (ALSA,
+ * CEC, etc.).
+ *
+ * Returns:
+ * The connector connected to @encoder, or an error pointer otherwise.
+ * When the error is EDEADLK, a deadlock has been detected and the
+ * sequence must be restarted.
+ */
+struct drm_connector *
+drm_atomic_get_connector_for_encoder(const struct drm_encoder *encoder,
+				     struct drm_modeset_acquire_ctx *ctx)
+{
+	struct drm_connector_list_iter conn_iter;
+	struct drm_connector *out_connector = ERR_PTR(-EINVAL);
+	struct drm_connector *connector;
+	struct drm_device *dev = encoder->dev;
+	int ret;
+
+	ret = drm_modeset_lock(&dev->mode_config.connection_mutex, ctx);
+	if (ret)
+		return ERR_PTR(ret);
+
+	drm_connector_list_iter_begin(dev, &conn_iter);
+	drm_for_each_connector_iter(connector, &conn_iter) {
+		if (!connector->state)
+			continue;
+
+		if (encoder == connector->state->best_encoder) {
+			out_connector = connector;
+			break;
+		}
+	}
+	drm_connector_list_iter_end(&conn_iter);
+	drm_modeset_unlock(&dev->mode_config.connection_mutex);
+
+	return out_connector;
+}
+EXPORT_SYMBOL(drm_atomic_get_connector_for_encoder);
+
+
+/**
  * drm_atomic_get_old_crtc_for_encoder - Get old crtc for an encoder
  * @state: Atomic state
  * @encoder: The encoder to fetch the crtc state for