Merging upstream version 6.10.3.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

7 files changed, 116 insertions, 52 deletions

diff --git a/drivers/gpu/drm/display/Kconfig b/drivers/gpu/drm/display/Kconfig
index c0f56888c3..864a6488bf 100644
--- a/drivers/gpu/drm/display/Kconfig
+++ b/drivers/gpu/drm/display/Kconfig
@@ -1,15 +1,36 @@
 # SPDX-License-Identifier: MIT
 
-config DRM_DP_AUX_BUS
+config DRM_DISPLAY_HELPER
 	tristate
 	depends on DRM
-	depends on OF || COMPILE_TEST
+	help
+	  DRM helpers for display adapters.
 
-config DRM_DISPLAY_HELPER
+config DRM_DISPLAY_DP_AUX_BUS
 	tristate
 	depends on DRM
+	depends on OF || COMPILE_TEST
+
+config DRM_DISPLAY_DP_AUX_CEC
+	bool "Enable DisplayPort CEC-Tunneling-over-AUX HDMI support"
+	depends on DRM && DRM_DISPLAY_HELPER
+	select DRM_DISPLAY_DP_HELPER
+	select CEC_CORE
 	help
-	  DRM helpers for display adapters.
+	  Choose this option if you want to enable HDMI CEC support for
+	  DisplayPort/USB-C to HDMI adapters.
+
+	  Note: not all adapters support this feature, and even for those
+	  that do support this they often do not hook up the CEC pin.
+
+config DRM_DISPLAY_DP_AUX_CHARDEV
+	bool "DRM DP AUX Interface"
+	depends on DRM && DRM_DISPLAY_HELPER
+	select DRM_DISPLAY_DP_HELPER
+	help
+	  Choose this option to enable a /dev/drm_dp_auxN node that allows to
+	  read and write values to arbitrary DPCD registers on the DP aux
+	  channel.
 
 config DRM_DISPLAY_DP_HELPER
 	bool
@@ -25,7 +46,7 @@ config DRM_DISPLAY_DP_TUNNEL
 	  DP tunnel features like the Bandwidth Allocation mode to maximize the
 	  BW utilization for display streams on Thunderbolt links.
 
-config DRM_DISPLAY_DEBUG_DP_TUNNEL_STATE
+config DRM_DISPLAY_DP_TUNNEL_STATE_DEBUG
 	bool "Enable debugging the DP tunnel state"
 	depends on REF_TRACKER
 	depends on DRM_DISPLAY_DP_TUNNEL
@@ -49,24 +70,3 @@ config DRM_DISPLAY_HDMI_HELPER
 	depends on DRM_DISPLAY_HELPER
 	help
 	  DRM display helpers for HDMI.
-
-config DRM_DP_AUX_CHARDEV
-	bool "DRM DP AUX Interface"
-	depends on DRM && DRM_DISPLAY_HELPER
-	select DRM_DISPLAY_DP_HELPER
-	help
-	  Choose this option to enable a /dev/drm_dp_auxN node that allows to
-	  read and write values to arbitrary DPCD registers on the DP aux
-	  channel.
-
-config DRM_DP_CEC
-	bool "Enable DisplayPort CEC-Tunneling-over-AUX HDMI support"
-	depends on DRM && DRM_DISPLAY_HELPER
-	select DRM_DISPLAY_DP_HELPER
-	select CEC_CORE
-	help
-	  Choose this option if you want to enable HDMI CEC support for
-	  DisplayPort/USB-C to HDMI adapters.
-
-	  Note: not all adapters support this feature, and even for those
-	  that do support this they often do not hook up the CEC pin.
diff --git a/drivers/gpu/drm/display/Makefile b/drivers/gpu/drm/display/Makefile
index 7ca61333c6..17d2cc73ff 100644
--- a/drivers/gpu/drm/display/Makefile
+++ b/drivers/gpu/drm/display/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: MIT
 
-obj-$(CONFIG_DRM_DP_AUX_BUS) += drm_dp_aux_bus.o
+obj-$(CONFIG_DRM_DISPLAY_DP_AUX_BUS) += drm_dp_aux_bus.o
 
 drm_display_helper-y := drm_display_helper_mod.o
 drm_display_helper-$(CONFIG_DRM_DISPLAY_DP_HELPER) += \
@@ -14,7 +14,7 @@ drm_display_helper-$(CONFIG_DRM_DISPLAY_HDCP_HELPER) += drm_hdcp_helper.o
 drm_display_helper-$(CONFIG_DRM_DISPLAY_HDMI_HELPER) += \
 	drm_hdmi_helper.o \
 	drm_scdc_helper.o
-drm_display_helper-$(CONFIG_DRM_DP_AUX_CHARDEV) += drm_dp_aux_dev.o
-drm_display_helper-$(CONFIG_DRM_DP_CEC) += drm_dp_cec.o
+drm_display_helper-$(CONFIG_DRM_DISPLAY_DP_AUX_CHARDEV) += drm_dp_aux_dev.o
+drm_display_helper-$(CONFIG_DRM_DISPLAY_DP_AUX_CEC) += drm_dp_cec.o
 
 obj-$(CONFIG_DRM_DISPLAY_HELPER) += drm_display_helper.o
diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c
index f5d4be8978..79a615667a 100644
--- a/drivers/gpu/drm/display/drm_dp_helper.c
+++ b/drivers/gpu/drm/display/drm_dp_helper.c
@@ -2113,7 +2113,7 @@ EXPORT_SYMBOL(drm_dp_aux_init);
  * drm_dp_aux_register() in &drm_connector_funcs.late_register, and likewise to
  * call drm_dp_aux_unregister() in &drm_connector_funcs.early_unregister.
  * Functions which don't follow this will likely Oops when
- * %CONFIG_DRM_DP_AUX_CHARDEV is enabled.
+ * %CONFIG_DRM_DISPLAY_DP_AUX_CHARDEV is enabled.
  *
  * For devices where the AUX channel is a device that exists independently of
  * the &drm_device that uses it, such as SoCs and bridge devices, it is
@@ -2281,6 +2281,8 @@ static const struct dpcd_quirk dpcd_quirk_list[] = {
 	{ OUI(0x90, 0xCC, 0x24), DEVICE_ID_ANY, true, BIT(DP_DPCD_QUIRK_DSC_WITHOUT_VIRTUAL_DPCD) },
 	/* Synaptics DP1.4 MST hubs require DSC for some modes on which it applies HBLANK expansion. */
 	{ OUI(0x90, 0xCC, 0x24), DEVICE_ID_ANY, true, BIT(DP_DPCD_QUIRK_HBLANK_EXPANSION_REQUIRES_DSC) },
+	/* MediaTek panels (at least in U3224KBA) require DSC for modes with a short HBLANK on UHBR links. */
+	{ OUI(0x00, 0x0C, 0xE7), DEVICE_ID_ANY, false, BIT(DP_DPCD_QUIRK_HBLANK_EXPANSION_REQUIRES_DSC) },
 	/* Apple MacBookPro 2017 15 inch eDP Retina panel reports too low DP_MAX_LINK_RATE */
 	{ OUI(0x00, 0x10, 0xfa), DEVICE_ID(101, 68, 21, 101, 98, 97), false, BIT(DP_DPCD_QUIRK_CAN_DO_MAX_LINK_RATE_3_24_GBPS) },
 };
@@ -2948,6 +2950,43 @@ void drm_dp_vsc_sdp_log(struct drm_printer *p, const struct drm_dp_vsc_sdp *vsc)
 }
 EXPORT_SYMBOL(drm_dp_vsc_sdp_log);
 
+void drm_dp_as_sdp_log(struct drm_printer *p, const struct drm_dp_as_sdp *as_sdp)
+{
+	drm_printf(p, "DP SDP: AS_SDP, revision %u, length %u\n",
+		   as_sdp->revision, as_sdp->length);
+	drm_printf(p, "    vtotal: %d\n", as_sdp->vtotal);
+	drm_printf(p, "    target_rr: %d\n", as_sdp->target_rr);
+	drm_printf(p, "    duration_incr_ms: %d\n", as_sdp->duration_incr_ms);
+	drm_printf(p, "    duration_decr_ms: %d\n", as_sdp->duration_decr_ms);
+	drm_printf(p, "    operation_mode: %d\n", as_sdp->mode);
+}
+EXPORT_SYMBOL(drm_dp_as_sdp_log);
+
+/**
+ * drm_dp_as_sdp_supported() - check if adaptive sync sdp is supported
+ * @aux: DisplayPort AUX channel
+ * @dpcd: DisplayPort configuration data
+ *
+ * Returns true if adaptive sync sdp is supported, else returns false
+ */
+bool drm_dp_as_sdp_supported(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE])
+{
+	u8 rx_feature;
+
+	if (dpcd[DP_DPCD_REV] < DP_DPCD_REV_13)
+		return false;
+
+	if (drm_dp_dpcd_readb(aux, DP_DPRX_FEATURE_ENUMERATION_LIST_CONT_1,
+			      &rx_feature) != 1) {
+		drm_dbg_dp(aux->drm_dev,
+			   "Failed to read DP_DPRX_FEATURE_ENUMERATION_LIST_CONT_1\n");
+		return false;
+	}
+
+	return (rx_feature & DP_ADAPTIVE_SYNC_SDP_SUPPORTED);
+}
+EXPORT_SYMBOL(drm_dp_as_sdp_supported);
+
 /**
  * drm_dp_vsc_sdp_supported() - check if vsc sdp is supported
  * @aux: DisplayPort AUX channel
diff --git a/drivers/gpu/drm/display/drm_dp_helper_internal.h b/drivers/gpu/drm/display/drm_dp_helper_internal.h
index 8917fc3af9..737949a282 100644
--- a/drivers/gpu/drm/display/drm_dp_helper_internal.h
+++ b/drivers/gpu/drm/display/drm_dp_helper_internal.h
@@ -5,7 +5,7 @@
 
 struct drm_dp_aux;
 
-#ifdef CONFIG_DRM_DP_AUX_CHARDEV
+#ifdef CONFIG_DRM_DISPLAY_DP_AUX_CHARDEV
 int drm_dp_aux_dev_init(void);
 void drm_dp_aux_dev_exit(void);
 int drm_dp_aux_register_devnode(struct drm_dp_aux *aux);
diff --git a/drivers/gpu/drm/display/drm_dp_mst_topology.c b/drivers/gpu/drm/display/drm_dp_mst_topology.c
index 95fd18f24e..68831f4e50 100644
--- a/drivers/gpu/drm/display/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/display/drm_dp_mst_topology.c
@@ -2274,7 +2274,7 @@ drm_dp_mst_port_add_connector(struct drm_dp_mst_branch *mstb,
 
 	if (port->pdt != DP_PEER_DEVICE_NONE &&
 	    drm_dp_mst_is_end_device(port->pdt, port->mcs) &&
-	    port->port_num >= DP_MST_LOGICAL_PORT_0)
+	    drm_dp_mst_port_is_logical(port))
 		port->cached_edid = drm_edid_read_ddc(port->connector,
 						      &port->aux.ddc);
 
@@ -2929,7 +2929,7 @@ static int drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr,
 
 	/* FIXME: Actually do some real error handling here */
 	ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);
-	if (ret <= 0) {
+	if (ret < 0) {
 		drm_err(mgr->dev, "Sending link address failed with %d\n", ret);
 		goto out;
 	}
@@ -2981,7 +2981,7 @@ static int drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr,
 	mutex_unlock(&mgr->lock);
 
 out:
-	if (ret <= 0)
+	if (ret < 0)
 		mstb->link_address_sent = false;
 	kfree(txmsg);
 	return ret < 0 ? ret : changed;
@@ -3606,24 +3606,30 @@ fixed20_12 drm_dp_get_vc_payload_bw(const struct drm_dp_mst_topology_mgr *mgr,
 EXPORT_SYMBOL(drm_dp_get_vc_payload_bw);
 
 /**
- * drm_dp_read_mst_cap() - check whether or not a sink supports MST
+ * drm_dp_read_mst_cap() - Read the sink's MST mode capability
  * @aux: The DP AUX channel to use
  * @dpcd: A cached copy of the DPCD capabilities for this sink
  *
- * Returns: %True if the sink supports MST, %false otherwise
+ * Returns: enum drm_dp_mst_mode to indicate MST mode capability
  */
-bool drm_dp_read_mst_cap(struct drm_dp_aux *aux,
-			 const u8 dpcd[DP_RECEIVER_CAP_SIZE])
+enum drm_dp_mst_mode drm_dp_read_mst_cap(struct drm_dp_aux *aux,
+					 const u8 dpcd[DP_RECEIVER_CAP_SIZE])
 {
 	u8 mstm_cap;
 
 	if (dpcd[DP_DPCD_REV] < DP_DPCD_REV_12)
-		return false;
+		return DRM_DP_SST;
 
 	if (drm_dp_dpcd_readb(aux, DP_MSTM_CAP, &mstm_cap) != 1)
-		return false;
+		return DRM_DP_SST;
 
-	return mstm_cap & DP_MST_CAP;
+	if (mstm_cap & DP_MST_CAP)
+		return DRM_DP_MST;
+
+	if (mstm_cap & DP_SINGLE_STREAM_SIDEBAND_MSG)
+		return DRM_DP_SST_SIDEBAND_MSG;
+
+	return DRM_DP_SST;
 }
 EXPORT_SYMBOL(drm_dp_read_mst_cap);
 
@@ -4211,7 +4217,7 @@ drm_dp_mst_detect_port(struct drm_connector *connector,
 	case DP_PEER_DEVICE_SST_SINK:
 		ret = connector_status_connected;
 		/* for logical ports - cache the EDID */
-		if (port->port_num >= DP_MST_LOGICAL_PORT_0 && !port->cached_edid)
+		if (drm_dp_mst_port_is_logical(port) && !port->cached_edid)
 			port->cached_edid = drm_edid_read_ddc(connector, &port->aux.ddc);
 		break;
 	case DP_PEER_DEVICE_DP_LEGACY_CONV:
@@ -5975,7 +5981,7 @@ static bool drm_dp_mst_is_virtual_dpcd(struct drm_dp_mst_port *port)
 		return false;
 
 	/* Virtual DP Sink (Internal Display Panel) */
-	if (port->port_num >= 8)
+	if (drm_dp_mst_port_is_logical(port))
 		return true;
 
 	/* DP-to-HDMI Protocol Converter */
@@ -6003,6 +6009,22 @@ static bool drm_dp_mst_is_virtual_dpcd(struct drm_dp_mst_port *port)
 }
 
 /**
+ * drm_dp_mst_aux_for_parent() - Get the AUX device for an MST port's parent
+ * @port: MST port whose parent's AUX device is returned
+ *
+ * Return the AUX device for @port's parent or NULL if port's parent is the
+ * root port.
+ */
+struct drm_dp_aux *drm_dp_mst_aux_for_parent(struct drm_dp_mst_port *port)
+{
+	if (!port->parent || !port->parent->port_parent)
+		return NULL;
+
+	return &port->parent->port_parent->aux;
+}
+EXPORT_SYMBOL(drm_dp_mst_aux_for_parent);
+
+/**
  * drm_dp_mst_dsc_aux_for_port() - Find the correct aux for DSC
  * @port: The port to check. A leaf of the MST tree with an attached display.
  *
diff --git a/drivers/gpu/drm/display/drm_dp_mst_topology_internal.h b/drivers/gpu/drm/display/drm_dp_mst_topology_internal.h
index a785ccbfdd..f41c34e26b 100644
--- a/drivers/gpu/drm/display/drm_dp_mst_topology_internal.h
+++ b/drivers/gpu/drm/display/drm_dp_mst_topology_internal.h
@@ -10,7 +10,9 @@
 #ifndef _DRM_DP_MST_HELPER_INTERNAL_H_
 #define _DRM_DP_MST_HELPER_INTERNAL_H_
 
-#include <drm/display/drm_dp_mst_helper.h>
+struct drm_dp_sideband_msg_req_body;
+struct drm_dp_sideband_msg_tx;
+struct drm_printer;
 
 void
 drm_dp_encode_sideband_req(const struct drm_dp_sideband_msg_req_body *req,
diff --git a/drivers/gpu/drm/display/drm_dp_tunnel.c b/drivers/gpu/drm/display/drm_dp_tunnel.c
index 120e0de674..48b2df1200 100644
--- a/drivers/gpu/drm/display/drm_dp_tunnel.c
+++ b/drivers/gpu/drm/display/drm_dp_tunnel.c
@@ -191,7 +191,7 @@ struct drm_dp_tunnel_mgr {
 	struct drm_dp_tunnel_group *groups;
 	wait_queue_head_t bw_req_queue;
 
-#ifdef CONFIG_DRM_DISPLAY_DEBUG_DP_TUNNEL_STATE
+#ifdef CONFIG_DRM_DISPLAY_DP_TUNNEL_STATE_DEBUG
 	struct ref_tracker_dir ref_tracker;
 #endif
 };
@@ -385,7 +385,7 @@ static void tunnel_put(struct drm_dp_tunnel *tunnel)
 	kref_put(&tunnel->kref, free_tunnel);
 }
 
-#ifdef CONFIG_DRM_DISPLAY_DEBUG_DP_TUNNEL_STATE
+#ifdef CONFIG_DRM_DISPLAY_DP_TUNNEL_STATE_DEBUG
 static void track_tunnel_ref(struct drm_dp_tunnel *tunnel,
 			     struct ref_tracker **tracker)
 {
@@ -436,8 +436,8 @@ EXPORT_SYMBOL(drm_dp_tunnel_get);
 
 /**
  * drm_dp_tunnel_put - Put a reference for a DP tunnel
- * @tunnel - Tunnel object
- * @tracker - Debug tracker for the reference
+ * @tunnel: Tunnel object
+ * @tracker: Debug tracker for the reference
  *
  * Put a reference for @tunnel along with its debug *@tracker, which
  * was obtained with drm_dp_tunnel_get().
@@ -1170,7 +1170,7 @@ int drm_dp_tunnel_alloc_bw(struct drm_dp_tunnel *tunnel, int bw)
 EXPORT_SYMBOL(drm_dp_tunnel_alloc_bw);
 
 /**
- * drm_dp_tunnel_atomic_get_allocated_bw - Get the BW allocated for a DP tunnel
+ * drm_dp_tunnel_get_allocated_bw - Get the BW allocated for a DP tunnel
  * @tunnel: Tunnel object
  *
  * Get the current BW allocated for @tunnel. After the tunnel is created /
@@ -1603,7 +1603,7 @@ static void cleanup_group(struct drm_dp_tunnel_group *group)
 	drm_atomic_private_obj_fini(&group->base);
 }
 
-#ifdef CONFIG_DRM_DISPLAY_DEBUG_DP_TUNNEL_STATE
+#ifdef CONFIG_DRM_DISPLAY_DP_TUNNEL_STATE_DEBUG
 static void check_unique_stream_ids(const struct drm_dp_tunnel_group_state *group_state)
 {
 	const struct drm_dp_tunnel_state *tunnel_state;
@@ -1881,7 +1881,7 @@ static void destroy_mgr(struct drm_dp_tunnel_mgr *mgr)
 		drm_WARN_ON(mgr->dev, !list_empty(&mgr->groups[i].tunnels));
 	}
 
-#ifdef CONFIG_DRM_DISPLAY_DEBUG_DP_TUNNEL_STATE
+#ifdef CONFIG_DRM_DISPLAY_DP_TUNNEL_STATE_DEBUG
 	ref_tracker_dir_exit(&mgr->ref_tracker);
 #endif
 
@@ -1892,6 +1892,7 @@ static void destroy_mgr(struct drm_dp_tunnel_mgr *mgr)
 /**
  * drm_dp_tunnel_mgr_create - Create a DP tunnel manager
  * @dev: DRM device object
+ * @max_group_count: Maximum number of tunnel groups
  *
  * Creates a DP tunnel manager for @dev.
  *
@@ -1918,7 +1919,7 @@ drm_dp_tunnel_mgr_create(struct drm_device *dev, int max_group_count)
 		return NULL;
 	}
 
-#ifdef CONFIG_DRM_DISPLAY_DEBUG_DP_TUNNEL_STATE
+#ifdef CONFIG_DRM_DISPLAY_DP_TUNNEL_STATE_DEBUG
 	ref_tracker_dir_init(&mgr->ref_tracker, 16, "dptun");
 #endif