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authorDave Airlie <airlied@redhat.com>2019-10-30 09:01:28 +1000
committerDave Airlie <airlied@redhat.com>2019-10-30 09:51:03 +1000
commit57c2af791b6c8087b6d8b56046838427d2ec0d73 (patch)
treed6ce203aac6f10fd9ee9aeb14c9f07fe59ae82c4 /drivers/gpu/drm
parent8c84b43f17cb0fa6543c20652aa2c6f0356bc686 (diff)
parent12a280c7286857119cf0d88c487f695e3a1c0912 (diff)
Merge tag 'topic/mst-suspend-resume-reprobe-2019-10-29-2' of git://anongit.freedesktop.org/drm/drm-misc into drm-next
UAPI Changes: Cross-subsystem Changes: Core Changes: * Handle UP requests asynchronously in the DP MST helpers, fixing hotplug notifications and allowing us to implement suspend/resume reprobing * Add basic suspend/resume reprobing to the DP MST helpers * Improve locking for link address reprobing and connection status request handling in the DP MST helpers * Miscellaneous refactoring in the DP MST helpers * Add a Kconfig option to the DP MST helpers to enable tracking of gets/puts for topology references for debugging purposes Driver Changes: * nouveau: Resume hotplug interrupts earlier, so that sideband messages may be transmitted during resume and thus allow suspend/resume reprobing for DP MST to work * nouveau: Avoid grabbing runtime PM references when handling short DP pulses, so that handling sideband messages in resume codepaths with the DP MST helpers doesn't deadlock us * i915, nouveau, amdgpu, radeon: Use detect_ctx for probing MST connectors, so that we can grab the topology manager's atomic lock Note: there's some amdgpu patches that I didn't realize were pushed upstream already when creating this topic branch. When they fail to apply, you can just ignore and skip them. Signed-off-by: Dave Airlie <airlied@redhat.com> From: Lyude Paul <lyude@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/a74c6446bc960190d195a751cb6d8a00a98f3974.camel@redhat.com
Diffstat (limited to 'drivers/gpu/drm')
-rw-r--r--drivers/gpu/drm/Kconfig14
-rw-r--r--drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c4
-rw-r--r--drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c28
-rw-r--r--drivers/gpu/drm/drm_dp_mst_topology.c1176
-rw-r--r--drivers/gpu/drm/i915/display/intel_dp.c3
-rw-r--r--drivers/gpu/drm/i915/display/intel_dp_mst.c28
-rw-r--r--drivers/gpu/drm/nouveau/dispnv50/disp.c38
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_connector.c33
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_display.c19
-rw-r--r--drivers/gpu/drm/radeon/radeon_dp_mst.c24
10 files changed, 988 insertions, 379 deletions
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index dba57ca0c9d9..617d9c3a86c3 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -93,6 +93,20 @@ config DRM_KMS_FB_HELPER
help
FBDEV helpers for KMS drivers.
+config DRM_DEBUG_DP_MST_TOPOLOGY_REFS
+ bool "Enable refcount backtrace history in the DP MST helpers"
+ select STACKDEPOT
+ depends on DRM_KMS_HELPER
+ depends on DEBUG_KERNEL
+ depends on EXPERT
+ help
+ Enables debug tracing for topology refs in DRM's DP MST helpers. A
+ history of each topology reference/dereference will be printed to the
+ kernel log once a port or branch device's topology refcount reaches 0.
+
+ This has the potential to use a lot of memory and print some very
+ large kernel messages. If in doubt, say "N".
+
config DRM_FBDEV_EMULATION
bool "Enable legacy fbdev support for your modesetting driver"
depends on DRM
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 23bdcbcb477a..b3d4403b7d9f 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1028,7 +1028,7 @@ static void s3_handle_mst(struct drm_device *dev, bool suspend)
if (suspend) {
drm_dp_mst_topology_mgr_suspend(mgr);
} else {
- ret = drm_dp_mst_topology_mgr_resume(mgr);
+ ret = drm_dp_mst_topology_mgr_resume(mgr, true);
if (ret < 0) {
drm_dp_mst_topology_mgr_set_mst(mgr, false);
need_hotplug = true;
@@ -1246,7 +1246,7 @@ static int dm_resume(void *handle)
*/
amdgpu_dm_irq_resume_early(adev);
- /* On resume we need to rewrite the MSTM control bits to enable MST*/
+ /* On resume we need to rewrite the MSTM control bits to enable MST*/
s3_handle_mst(ddev, false);
/* Do detection*/
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index d9113ce0be09..3c1f8258291c 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -123,21 +123,6 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
return result;
}
-static enum drm_connector_status
-dm_dp_mst_detect(struct drm_connector *connector, bool force)
-{
- struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
- struct amdgpu_dm_connector *master = aconnector->mst_port;
-
- enum drm_connector_status status =
- drm_dp_mst_detect_port(
- connector,
- &master->mst_mgr,
- aconnector->port);
-
- return status;
-}
-
static void
dm_dp_mst_connector_destroy(struct drm_connector *connector)
{
@@ -175,7 +160,6 @@ amdgpu_dm_mst_connector_early_unregister(struct drm_connector *connector)
}
static const struct drm_connector_funcs dm_dp_mst_connector_funcs = {
- .detect = dm_dp_mst_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = dm_dp_mst_connector_destroy,
.reset = amdgpu_dm_connector_funcs_reset,
@@ -250,10 +234,22 @@ dm_mst_atomic_best_encoder(struct drm_connector *connector,
return &to_amdgpu_dm_connector(connector)->mst_encoder->base;
}
+static int
+dm_dp_mst_detect(struct drm_connector *connector,
+ struct drm_modeset_acquire_ctx *ctx, bool force)
+{
+ struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
+ struct amdgpu_dm_connector *master = aconnector->mst_port;
+
+ return drm_dp_mst_detect_port(connector, ctx, &master->mst_mgr,
+ aconnector->port);
+}
+
static const struct drm_connector_helper_funcs dm_dp_mst_connector_helper_funcs = {
.get_modes = dm_dp_mst_get_modes,
.mode_valid = amdgpu_dm_connector_mode_valid,
.atomic_best_encoder = dm_mst_atomic_best_encoder,
+ .detect_ctx = dm_dp_mst_detect,
};
static void amdgpu_dm_encoder_destroy(struct drm_encoder *encoder)
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index b854a422a523..85bef73a6763 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -28,6 +28,13 @@
#include <linux/sched.h>
#include <linux/seq_file.h>
+#if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)
+#include <linux/stackdepot.h>
+#include <linux/sort.h>
+#include <linux/timekeeping.h>
+#include <linux/math64.h>
+#endif
+
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_dp_mst_helper.h>
@@ -45,6 +52,12 @@
* protocol. The helpers contain a topology manager and bandwidth manager.
* The helpers encapsulate the sending and received of sideband msgs.
*/
+struct drm_dp_pending_up_req {
+ struct drm_dp_sideband_msg_hdr hdr;
+ struct drm_dp_sideband_msg_req_body msg;
+ struct list_head next;
+};
+
static bool dump_dp_payload_table(struct drm_dp_mst_topology_mgr *mgr,
char *buf);
@@ -61,8 +74,8 @@ static int drm_dp_send_dpcd_write(struct drm_dp_mst_topology_mgr *mgr,
struct drm_dp_mst_port *port,
int offset, int size, u8 *bytes);
-static void drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr,
- struct drm_dp_mst_branch *mstb);
+static int drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr,
+ struct drm_dp_mst_branch *mstb);
static int drm_dp_send_enum_path_resources(struct drm_dp_mst_topology_mgr *mgr,
struct drm_dp_mst_branch *mstb,
struct drm_dp_mst_port *port);
@@ -1393,39 +1406,194 @@ drm_dp_mst_put_port_malloc(struct drm_dp_mst_port *port)
}
EXPORT_SYMBOL(drm_dp_mst_put_port_malloc);
-static void drm_dp_destroy_mst_branch_device(struct kref *kref)
+#if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)
+
+#define STACK_DEPTH 8
+
+static noinline void
+__topology_ref_save(struct drm_dp_mst_topology_mgr *mgr,
+ struct drm_dp_mst_topology_ref_history *history,
+ enum drm_dp_mst_topology_ref_type type)
{
- struct drm_dp_mst_branch *mstb =
- container_of(kref, struct drm_dp_mst_branch, topology_kref);
- struct drm_dp_mst_topology_mgr *mgr = mstb->mgr;
- struct drm_dp_mst_port *port, *tmp;
- bool wake_tx = false;
+ struct drm_dp_mst_topology_ref_entry *entry = NULL;
+ depot_stack_handle_t backtrace;
+ ulong stack_entries[STACK_DEPTH];
+ uint n;
+ int i;
- mutex_lock(&mgr->lock);
- list_for_each_entry_safe(port, tmp, &mstb->ports, next) {
- list_del(&port->next);
- drm_dp_mst_topology_put_port(port);
+ n = stack_trace_save(stack_entries, ARRAY_SIZE(stack_entries), 1);
+ backtrace = stack_depot_save(stack_entries, n, GFP_KERNEL);
+ if (!backtrace)
+ return;
+
+ /* Try to find an existing entry for this backtrace */
+ for (i = 0; i < history->len; i++) {
+ if (history->entries[i].backtrace == backtrace) {
+ entry = &history->entries[i];
+ break;
+ }
}
- mutex_unlock(&mgr->lock);
- /* drop any tx slots msg */
- mutex_lock(&mstb->mgr->qlock);
- if (mstb->tx_slots[0]) {
- mstb->tx_slots[0]->state = DRM_DP_SIDEBAND_TX_TIMEOUT;
- mstb->tx_slots[0] = NULL;
- wake_tx = true;
+ /* Otherwise add one */
+ if (!entry) {
+ struct drm_dp_mst_topology_ref_entry *new;
+ int new_len = history->len + 1;
+
+ new = krealloc(history->entries, sizeof(*new) * new_len,
+ GFP_KERNEL);
+ if (!new)
+ return;
+
+ entry = &new[history->len];
+ history->len = new_len;
+ history->entries = new;
+
+ entry->backtrace = backtrace;
+ entry->type = type;
+ entry->count = 0;
}
- if (mstb->tx_slots[1]) {
- mstb->tx_slots[1]->state = DRM_DP_SIDEBAND_TX_TIMEOUT;
- mstb->tx_slots[1] = NULL;
- wake_tx = true;
+ entry->count++;
+ entry->ts_nsec = ktime_get_ns();
+}
+
+static int
+topology_ref_history_cmp(const void *a, const void *b)
+{
+ const struct drm_dp_mst_topology_ref_entry *entry_a = a, *entry_b = b;
+
+ if (entry_a->ts_nsec > entry_b->ts_nsec)
+ return 1;
+ else if (entry_a->ts_nsec < entry_b->ts_nsec)
+ return -1;
+ else
+ return 0;
+}
+
+static inline const char *
+topology_ref_type_to_str(enum drm_dp_mst_topology_ref_type type)
+{
+ if (type == DRM_DP_MST_TOPOLOGY_REF_GET)
+ return "get";
+ else
+ return "put";
+}
+
+static void
+__dump_topology_ref_history(struct drm_dp_mst_topology_ref_history *history,
+ void *ptr, const char *type_str)
+{
+ struct drm_printer p = drm_debug_printer(DBG_PREFIX);
+ char *buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
+ int i;
+
+ if (!buf)
+ return;
+
+ if (!history->len)
+ goto out;
+
+ /* First, sort the list so that it goes from oldest to newest
+ * reference entry
+ */
+ sort(history->entries, history->len, sizeof(*history->entries),
+ topology_ref_history_cmp, NULL);
+
+ drm_printf(&p, "%s (%p) topology count reached 0, dumping history:\n",
+ type_str, ptr);
+
+ for (i = 0; i < history->len; i++) {
+ const struct drm_dp_mst_topology_ref_entry *entry =
+ &history->entries[i];
+ ulong *entries;
+ uint nr_entries;
+ u64 ts_nsec = entry->ts_nsec;
+ u64 rem_nsec = do_div(ts_nsec, 1000000000);
+
+ nr_entries = stack_depot_fetch(entry->backtrace, &entries);
+ stack_trace_snprint(buf, PAGE_SIZE, entries, nr_entries, 4);
+
+ drm_printf(&p, " %d %ss (last at %5llu.%06llu):\n%s",
+ entry->count,
+ topology_ref_type_to_str(entry->type),
+ ts_nsec, rem_nsec / 1000, buf);
}
- mutex_unlock(&mstb->mgr->qlock);
- if (wake_tx)
- wake_up_all(&mstb->mgr->tx_waitq);
+ /* Now free the history, since this is the only time we expose it */
+ kfree(history->entries);
+out:
+ kfree(buf);
+}
- drm_dp_mst_put_mstb_malloc(mstb);
+static __always_inline void
+drm_dp_mst_dump_mstb_topology_history(struct drm_dp_mst_branch *mstb)
+{
+ __dump_topology_ref_history(&mstb->topology_ref_history, mstb,
+ "MSTB");
+}
+
+static __always_inline void
+drm_dp_mst_dump_port_topology_history(struct drm_dp_mst_port *port)
+{
+ __dump_topology_ref_history(&port->topology_ref_history, port,
+ "Port");
+}
+
+static __always_inline void
+save_mstb_topology_ref(struct drm_dp_mst_branch *mstb,
+ enum drm_dp_mst_topology_ref_type type)
+{
+ __topology_ref_save(mstb->mgr, &mstb->topology_ref_history, type);
+}
+
+static __always_inline void
+save_port_topology_ref(struct drm_dp_mst_port *port,
+ enum drm_dp_mst_topology_ref_type type)
+{
+ __topology_ref_save(port->mgr, &port->topology_ref_history, type);
+}
+
+static inline void
+topology_ref_history_lock(struct drm_dp_mst_topology_mgr *mgr)
+{
+ mutex_lock(&mgr->topology_ref_history_lock);
+}
+
+static inline void
+topology_ref_history_unlock(struct drm_dp_mst_topology_mgr *mgr)
+{
+ mutex_unlock(&mgr->topology_ref_history_lock);
+}
+#else
+static inline void
+topology_ref_history_lock(struct drm_dp_mst_topology_mgr *mgr) {}
+static inline void
+topology_ref_history_unlock(struct drm_dp_mst_topology_mgr *mgr) {}
+static inline void
+drm_dp_mst_dump_mstb_topology_history(struct drm_dp_mst_branch *mstb) {}
+static inline void
+drm_dp_mst_dump_port_topology_history(struct drm_dp_mst_port *port) {}
+#define save_mstb_topology_ref(mstb, type)
+#define save_port_topology_ref(port, type)
+#endif
+
+static void drm_dp_destroy_mst_branch_device(struct kref *kref)
+{
+ struct drm_dp_mst_branch *mstb =
+ container_of(kref, struct drm_dp_mst_branch, topology_kref);
+ struct drm_dp_mst_topology_mgr *mgr = mstb->mgr;
+
+ drm_dp_mst_dump_mstb_topology_history(mstb);
+
+ INIT_LIST_HEAD(&mstb->destroy_next);
+
+ /*
+ * This can get called under mgr->mutex, so we need to perform the
+ * actual destruction of the mstb in another worker
+ */
+ mutex_lock(&mgr->delayed_destroy_lock);
+ list_add(&mstb->destroy_next, &mgr->destroy_branch_device_list);
+ mutex_unlock(&mgr->delayed_destroy_lock);
+ schedule_work(&mgr->delayed_destroy_work);
}
/**
@@ -1453,11 +1621,17 @@ static void drm_dp_destroy_mst_branch_device(struct kref *kref)
static int __must_check
drm_dp_mst_topology_try_get_mstb(struct drm_dp_mst_branch *mstb)
{
- int ret = kref_get_unless_zero(&mstb->topology_kref);
+ int ret;
- if (ret)
- DRM_DEBUG("mstb %p (%d)\n", mstb,
- kref_read(&mstb->topology_kref));
+ topology_ref_history_lock(mstb->mgr);
+ ret = kref_get_unless_zero(&mstb->topology_kref);
+ if (ret) {
+ DRM_DEBUG("mstb %p (%d)\n",
+ mstb, kref_read(&mstb->topology_kref));
+ save_mstb_topology_ref(mstb, DRM_DP_MST_TOPOLOGY_REF_GET);
+ }
+
+ topology_ref_history_unlock(mstb->mgr);
return ret;
}
@@ -1478,9 +1652,14 @@ drm_dp_mst_topology_try_get_mstb(struct drm_dp_mst_branch *mstb)
*/
static void drm_dp_mst_topology_get_mstb(struct drm_dp_mst_branch *mstb)
{
+ topology_ref_history_lock(mstb->mgr);
+
+ save_mstb_topology_ref(mstb, DRM_DP_MST_TOPOLOGY_REF_GET);
WARN_ON(kref_read(&mstb->topology_kref) == 0);
kref_get(&mstb->topology_kref);
DRM_DEBUG("mstb %p (%d)\n", mstb, kref_read(&mstb->topology_kref));
+
+ topology_ref_history_unlock(mstb->mgr);
}
/**
@@ -1498,27 +1677,14 @@ static void drm_dp_mst_topology_get_mstb(struct drm_dp_mst_branch *mstb)
static void
drm_dp_mst_topology_put_mstb(struct drm_dp_mst_branch *mstb)
{
+ topology_ref_history_lock(mstb->mgr);
+
DRM_DEBUG("mstb %p (%d)\n",
mstb, kref_read(&mstb->topology_kref) - 1);
- kref_put(&mstb->topology_kref, drm_dp_destroy_mst_branch_device);
-}
+ save_mstb_topology_ref(mstb, DRM_DP_MST_TOPOLOGY_REF_PUT);
-static void drm_dp_port_teardown_pdt(struct drm_dp_mst_port *port, int old_pdt)
-{
- struct drm_dp_mst_branch *mstb;
-
- switch (old_pdt) {
- case DP_PEER_DEVICE_DP_LEGACY_CONV:
- case DP_PEER_DEVICE_SST_SINK:
- /* remove i2c over sideband */
- drm_dp_mst_unregister_i2c_bus(&port->aux);
- break;
- case DP_PEER_DEVICE_MST_BRANCHING:
- mstb = port->mstb;
- port->mstb = NULL;
- drm_dp_mst_topology_put_mstb(mstb);
- break;
- }
+ topology_ref_history_unlock(mstb->mgr);
+ kref_put(&mstb->topology_kref, drm_dp_destroy_mst_branch_device);
}
static void drm_dp_destroy_port(struct kref *kref)
@@ -1527,31 +1693,24 @@ static void drm_dp_destroy_port(struct kref *kref)
container_of(kref, struct drm_dp_mst_port, topology_kref);
struct drm_dp_mst_topology_mgr *mgr = port->mgr;
- if (!port->input) {
- kfree(port->cached_edid);
+ drm_dp_mst_dump_port_topology_history(port);
- /*
- * The only time we don't have a connector
- * on an output port is if the connector init
- * fails.
- */
- if (port->connector) {
- /* we can't destroy the connector here, as
- * we might be holding the mode_config.mutex
- * from an EDID retrieval */
-
- mutex_lock(&mgr->destroy_connector_lock);
- list_add(&port->next, &mgr->destroy_connector_list);
- mutex_unlock(&mgr->destroy_connector_lock);
- schedule_work(&mgr->destroy_connector_work);
- return;
- }
- /* no need to clean up vcpi
- * as if we have no connector we never setup a vcpi */
- drm_dp_port_teardown_pdt(port, port->pdt);
- port->pdt = DP_PEER_DEVICE_NONE;
+ /* There's nothing that needs locking to destroy an input port yet */
+ if (port->input) {
+ drm_dp_mst_put_port_malloc(port);
+ return;
}
- drm_dp_mst_put_port_malloc(port);
+
+ kfree(port->cached_edid);
+
+ /*
+ * we can't destroy the connector here, as we might be holding the
+ * mode_config.mutex from an EDID retrieval
+ */
+ mutex_lock(&mgr->delayed_destroy_lock);
+ list_add(&port->next, &mgr->destroy_port_list);
+ mutex_unlock(&mgr->delayed_destroy_lock);
+ schedule_work(&mgr->delayed_destroy_work);
}
/**
@@ -1579,12 +1738,17 @@ static void drm_dp_destroy_port(struct kref *kref)
static int __must_check
drm_dp_mst_topology_try_get_port(struct drm_dp_mst_port *port)
{
- int ret = kref_get_unless_zero(&port->topology_kref);
+ int ret;
- if (ret)
- DRM_DEBUG("port %p (%d)\n", port,
- kref_read(&port->topology_kref));
+ topology_ref_history_lock(port->mgr);
+ ret = kref_get_unless_zero(&port->topology_kref);
+ if (ret) {
+ DRM_DEBUG("port %p (%d)\n",
+ port, kref_read(&port->topology_kref));
+ save_port_topology_ref(port, DRM_DP_MST_TOPOLOGY_REF_GET);
+ }
+ topology_ref_history_unlock(port->mgr);
return ret;
}
@@ -1603,9 +1767,14 @@ drm_dp_mst_topology_try_get_port(struct drm_dp_mst_port *port)
*/
static void drm_dp_mst_topology_get_port(struct drm_dp_mst_port *port)
{
+ topology_ref_history_lock(port->mgr);
+
WARN_ON(kref_read(&port->topology_kref) == 0);
kref_get(&port->topology_kref);
DRM_DEBUG("port %p (%d)\n", port, kref_read(&port->topology_kref));
+ save_port_topology_ref(port, DRM_DP_MST_TOPOLOGY_REF_GET);
+
+ topology_ref_history_unlock(port->mgr);
}
/**
@@ -1621,8 +1790,13 @@ static void drm_dp_mst_topology_get_port(struct drm_dp_mst_port *port)
*/
static void drm_dp_mst_topology_put_port(struct drm_dp_mst_port *port)
{
+ topology_ref_history_lock(port->mgr);
+
DRM_DEBUG("port %p (%d)\n",
port, kref_read(&port->topology_kref) - 1);
+ save_port_topology_ref(port, DRM_DP_MST_TOPOLOGY_REF_PUT);
+
+ topology_ref_history_unlock(port->mgr);
kref_put(&port->topology_kref, drm_dp_destroy_port);
}
@@ -1739,38 +1913,79 @@ static u8 drm_dp_calculate_rad(struct drm_dp_mst_port *port,
return parent_lct + 1;
}
-/*
- * return sends link address for new mstb
- */
-static bool drm_dp_port_setup_pdt(struct drm_dp_mst_port *port)
+static int drm_dp_port_set_pdt(struct drm_dp_mst_port *port, u8 new_pdt)
{
- int ret;
- u8 rad[6], lct;
- bool send_link = false;
+ struct drm_dp_mst_topology_mgr *mgr = port->mgr;
+ struct drm_dp_mst_branch *mstb;
+ u8 rad[8], lct;
+ int ret = 0;
+
+ if (port->pdt == new_pdt)
+ return 0;
+
+ /* Teardown the old pdt, if there is one */
+ switch (port->pdt) {
+ case DP_PEER_DEVICE_DP_LEGACY_CONV:
+ case DP_PEER_DEVICE_SST_SINK:
+ /*
+ * If the new PDT would also have an i2c bus, don't bother
+ * with reregistering it
+ */
+ if (new_pdt == DP_PEER_DEVICE_DP_LEGACY_CONV ||
+ new_pdt == DP_PEER_DEVICE_SST_SINK) {
+ port->pdt = new_pdt;
+ return 0;
+ }
+
+ /* remove i2c over sideband */
+ drm_dp_mst_unregister_i2c_bus(&port->aux);
+ break;
+ case DP_PEER_DEVICE_MST_BRANCHING:
+ mutex_lock(&mgr->lock);
+ drm_dp_mst_topology_put_mstb(port->mstb);
+ port->mstb = NULL;
+ mutex_unlock(&mgr->lock);
+ break;
+ }
+
+ port->pdt = new_pdt;
switch (port->pdt) {
case DP_PEER_DEVICE_DP_LEGACY_CONV:
case DP_PEER_DEVICE_SST_SINK:
/* add i2c over sideband */
ret = drm_dp_mst_register_i2c_bus(&port->aux);
break;
+
case DP_PEER_DEVICE_MST_BRANCHING:
lct = drm_dp_calculate_rad(port, rad);
+ mstb = drm_dp_add_mst_branch_device(lct, rad);
+ if (!mstb) {
+ ret = -ENOMEM;
+ DRM_ERROR("Failed to create MSTB for port %p", port);
+ goto out;
+ }
- port->mstb = drm_dp_add_mst_branch_device(lct, rad);
- if (port->mstb) {
- port->mstb->mgr = port->mgr;
- port->mstb->port_parent = port;
- /*
- * Make sure this port's memory allocation stays
- * around until its child MSTB releases it
- */
- drm_dp_mst_get_port_malloc(port);
+ mutex_lock(&mgr->lock);
+ port->mstb = mstb;
+ mstb->mgr = port->mgr;
+ mstb->port_parent = port;
- send_link = true;
- }
+ /*
+ * Make sure this port's memory allocation stays
+ * around until its child MSTB releases it
+ */
+ drm_dp_mst_get_port_malloc(port);
+ mutex_unlock(&mgr->lock);
+
+ /* And make sure we send a link address for this */
+ ret = 1;
break;
}
- return send_link;
+
+out:
+ if (ret < 0)
+ port->pdt = DP_PEER_DEVICE_NONE;
+ return ret;
}
/**
@@ -1903,44 +2118,130 @@ void drm_dp_mst_connector_early_unregister(struct drm_connector *connector,
EXPORT_SYMBOL(drm_dp_mst_connector_early_unregister);
static void
+drm_dp_mst_port_add_connector(struct drm_dp_mst_branch *mstb,
+ struct drm_dp_mst_port *port)
+{
+ struct drm_dp_mst_topology_mgr *mgr = port->mgr;
+ char proppath[255];
+ int ret;
+
+ build_mst_prop_path(mstb, port->port_num, proppath, sizeof(proppath));
+ port->connector = mgr->cbs->add_connector(mgr, port, proppath);
+ if (!port->connector) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ if ((port->pdt == DP_PEER_DEVICE_DP_LEGACY_CONV ||
+ port->pdt == DP_PEER_DEVICE_SST_SINK) &&
+ port->port_num >= DP_MST_LOGICAL_PORT_0) {
+ port->cached_edid = drm_get_edid(port->connector,
+ &port->aux.ddc);
+ drm_connector_set_tile_property(port->connector);
+ }
+
+ mgr->cbs->register_connector(port->connector);
+ return;
+
+error:
+ DRM_ERROR("Failed to create connector for port %p: %d\n", port, ret);
+}
+
+/*
+ * Drop a topology reference, and unlink the port from the in-memory topology
+ * layout
+ */
+static void
+drm_dp_mst_topology_unlink_port(struct drm_dp_mst_topology_mgr *mgr,
+ struct drm_dp_mst_port *port)
+{
+ mutex_lock(&mgr->lock);
+ list_del(&port->next);
+ mutex_unlock(&mgr->lock);
+ drm_dp_mst_topology_put_port(port);
+}
+
+static struct drm_dp_mst_port *
+drm_dp_mst_add_port(struct drm_device *dev,
+ struct drm_dp_mst_topology_mgr *mgr,
+ struct drm_dp_mst_branch *mstb, u8 port_number)
+{
+ struct drm_dp_mst_port *port = kzalloc(sizeof(*port), GFP_KERNEL);
+
+ if (!port)
+ return NULL;
+
+ kref_init(&port->topology_kref);
+ kref_init(&port->malloc_kref);
+ port->parent = mstb;
+ port->port_num = port_number;
+ port->mgr = mgr;
+ port->aux.name = "DPMST";
+ port->aux.dev = dev->dev;
+ port->aux.is_remote = true;
+
+ /*
+ * Make sure the memory allocation for our parent branch stays
+ * around until our own memory allocation is released
+ */
+ drm_dp_mst_get_mstb_malloc(mstb);
+
+ return port;
+}
+
+static int
drm_dp_mst_handle_link_address_port(struct drm_dp_mst_branch *mstb,
struct drm_device *dev,
struct drm_dp_link_addr_reply_port *port_msg)
{
+ struct drm_dp_mst_topology_mgr *mgr = mstb->mgr;
struct drm_dp_mst_port *port;
- bool ret;
- bool created = false;
- int old_pdt = 0;
- int old_ddps = 0;
+ int old_ddps = 0, ret;
+ u8 new_pdt = DP_PEER_DEVICE_NONE;
+ bool created = false, send_link_addr = false, changed = false;
port = drm_dp_get_port(mstb, port_msg->port_number);
if (!port) {
- port = kzalloc(sizeof(*port), GFP_KERNEL);
+ port = drm_dp_mst_add_port(dev, mgr, mstb,
+ port_msg->port_number);
if (!port)
- return;
- kref_init(&port->topology_kref);
- kref_init(&port->malloc_kref);
- port->parent = mstb;
- port->port_num = port_msg->port_number;
- port->mgr = mstb->mgr;
- port->aux.name = "DPMST";
- port->aux.dev = dev->dev;
- port->aux.is_remote = true;
-
- /*
- * Make sure the memory allocation for our parent branch stays
- * around until our own memory allocation is released
+ return -ENOMEM;
+ created = true;
+ changed = true;
+ } else if (!port->input && port_msg->input_port && port->connector) {
+ /* Since port->connector can't be changed here, we create a
+ * new port if input_port changes from 0 to 1
*/
- drm_dp_mst_get_mstb_malloc(mstb);
-
+ drm_dp_mst_topology_unlink_port(mgr, port);
+ drm_dp_mst_topology_put_port(port);
+ port = drm_dp_mst_add_port(dev, mgr, mstb,
+ port_msg->port_number);
+ if (!port)
+ return -ENOMEM;
+ changed = true;
created = true;
- } else {
- old_pdt = port->pdt;
+ } else if (port->input && !port_msg->input_port) {
+ changed = true;
+ } else if (port->connector) {
+ /* We're updating a port that's exposed to userspace, so do it
+ * under lock
+ */
+ drm_modeset_lock(&mgr->base.lock, NULL);
+
old_ddps = port->ddps;
+ changed = port->ddps != port_msg->ddps ||
+ (port->ddps &&
+ (port->ldps != port_msg->legacy_device_plug_status ||
+ port->dpcd_rev != port_msg->dpcd_revision ||
+ port->mcs != port_msg->mcs ||
+ port->pdt != port_msg->peer_device_type ||
+ port->num_sdp_stream_sinks !=
+ port_msg->num_sdp_stream_sinks));
}
- port->pdt = port_msg->peer_device_type;
port->input = port_msg->input_port;
+ if (!port->input)
+ new_pdt = port_msg->peer_device_type;
port->mcs = port_msg->mcs;
port->ddps = port_msg->ddps;
port->ldps = port_msg->legacy_device_plug_status;
@@ -1951,78 +2252,104 @@ drm_dp_mst_handle_link_address_port(struct drm_dp_mst_branch *mstb,
/* manage mstb port lists with mgr lock - take a reference
for this list */
if (created) {
- mutex_lock(&mstb->mgr->lock);
+ mutex_lock(&mgr->lock);
drm_dp_mst_topology_get_port(port);
list_add(&port->next, &mstb->ports);
- mutex_unlock(&mstb->mgr->lock);
+ mutex_unlock(&mgr->lock);
}
if (old_ddps != port->ddps) {
if (port->ddps) {
if (!port->input) {
- drm_dp_send_enum_path_resources(mstb->mgr,
- mstb, port);
+ drm_dp_send_enum_path_resources(mgr, mstb,
+ port);
}
} else {
port->available_pbn = 0;
}
}
- if (old_pdt != port->pdt && !port->input) {
- drm_dp_port_teardown_pdt(port, old_pdt);
-
- ret = drm_dp_port_setup_pdt(port);
- if (ret == true)
- drm_dp_send_link_address(mstb->mgr, port->mstb);
+ ret = drm_dp_port_set_pdt(port, new_pdt);
+ if (ret == 1) {
+ send_link_addr = true;
+ } else if (ret < 0) {
+ DRM_ERROR("Failed to change PDT on port %p: %d\n",
+ port, ret);
+ goto fail;
}
- if (created && !port->input) {
- char proppath[255];
-
- build_mst_prop_path(mstb, port->port_num, proppath,
- sizeof(proppath));
- port->connector = (*mstb->mgr->cbs->add_connector)(mstb->mgr,
- port,
- proppath);
- if (!port->connector) {
- /* remove it from the port list */
- mutex_lock(&mstb->mgr->lock);
- list_del(&port->next);
- mutex_unlock(&mstb->mgr->lock);
- /* drop port list reference */
- drm_dp_mst_topology_put_port(port);
- goto out;
- }
- if ((port->pdt == DP_PEER_DEVICE_DP_LEGACY_CONV ||
- port->pdt == DP_PEER_DEVICE_SST_SINK) &&
- port->port_num >= DP_MST_LOGICAL_PORT_0) {
- port->cached_edid = drm_get_edid(port->connector,
- &port->aux.ddc);
- drm_connector_set_tile_property(port->connector);
- }
- (*mstb->mgr->cbs->register_connector)(port->connector);
+ /*
+ * If this port wasn't just created, then we're reprobing because
+ * we're coming out of suspend. In this case, always resend the link
+ * address if there's an MSTB on this port
+ */
+ if (!created && port->pdt == DP_PEER_DEVICE_MST_BRANCHING)
+ send_link_addr = true;
+
+ if (port->connector)
+ drm_modeset_unlock(&mgr->base.lock);
+ else if (!port->input)
+ drm_dp_mst_port_add_connector(mstb, port);
+
+ if (send_link_addr && port->mstb) {
+ ret = drm_dp_send_link_address(mgr, port->mstb);
+ if (ret == 1) /* MSTB below us changed */
+ changed = true;
+ else if (ret < 0)
+ goto fail_put;
}
-out:
/* put reference to this port */
drm_dp_mst_topology_put_port(port);
+ return changed;
+
+fail:
+ drm_dp_mst_topology_unlink_port(mgr, port);
+ if (port->connector)
+ drm_modeset_unlock(&mgr->base.lock);
+fail_put:
+ drm_dp_mst_topology_put_port(port);
+ return ret;
}
static void
drm_dp_mst_handle_conn_stat(struct drm_dp_mst_branch *mstb,
struct drm_dp_connection_status_notify *conn_stat)
{
+ struct drm_dp_mst_topology_mgr *mgr = mstb->mgr;
struct drm_dp_mst_port *port;
- int old_pdt;
- int old_ddps;
- bool dowork = false;
+ int old_ddps, ret;
+ u8 new_pdt;
+ bool dowork = false, create_connector = false;
+
port = drm_dp_get_port(mstb, conn_stat->port_number);
if (!port)
return;
+ if (port->connector) {
+ if (!port->input && conn_stat->input_port) {
+ /*
+ * We can't remove a connector from an already exposed
+ * port, so just throw the port out and make sure we
+ * reprobe the link address of it's parent MSTB
+ */
+ drm_dp_mst_topology_unlink_port(mgr, port);
+ mstb->link_address_sent = false;
+ dowork = true;
+ goto out;
+ }
+
+ /* Locking is only needed if the port's exposed to userspace */
+ drm_modeset_lock(&mgr->base.lock, NULL);
+ } else if (port->input && !conn_stat->input_port) {
+ create_connector = true;
+ /* Reprobe link address so we get num_sdp_streams */
+ mstb->link_address_sent = false;
+ dowork = true;
+ }
+
old_ddps = port->ddps;
- old_pdt = port->pdt;
- port->pdt = conn_stat->peer_device_type;
+ port->input = conn_stat->input_port;
port->mcs = conn_stat->message_capability_status;
port->ldps = conn_stat->legacy_device_plug_status;
port->ddps = conn_stat->displayport_device_plug_status;
@@ -2034,17 +2361,27 @@ drm_dp_mst_handle_conn_stat(struct drm_dp_mst_branch *mstb,
port->available_pbn = 0;
}
}
- if (old_pdt != port->pdt && !port->input) {
- drm_dp_port_teardown_pdt(port, old_pdt);
- if (drm_dp_port_setup_pdt(port))
- dowork = true;
+ new_pdt = port->input ? DP_PEER_DEVICE_NONE : conn_stat->peer_device_type;
+
+ ret = drm_dp_port_set_pdt(port, new_pdt);
+ if (ret == 1) {
+ dowork = true;
+ } else if (ret < 0) {
+ DRM_ERROR("Failed to change PDT for port %p: %d\n",
+ port, ret);
+ dowork = false;
}
+ if (port->connector)
+ drm_modeset_unlock(&mgr->base.lock);
+ else if (create_connector)
+ drm_dp_mst_port_add_connector(mstb, port);
+
+out:
drm_dp_mst_topology_put_port(port);
if (dowork)
queue_work(system_long_wq, &mstb->mgr->work);
-
}
static struct drm_dp_mst_branch *drm_dp_get_mst_branch_device(struct drm_dp_mst_topology_mgr *mgr,
@@ -2130,41 +2467,62 @@ drm_dp_get_mst_branch_device_by_guid(struct drm_dp_mst_topology_mgr *mgr,
return mstb;
}
-static void drm_dp_check_and_send_link_address(struct drm_dp_mst_topology_mgr *mgr,
+static int drm_dp_check_and_send_link_address(struct drm_dp_mst_topology_mgr *mgr,
struct drm_dp_mst_branch *mstb)
{
struct drm_dp_mst_port *port;
- struct drm_dp_mst_branch *mstb_child;
- if (!mstb->link_address_sent)
- drm_dp_send_link_address(mgr, mstb);
+ int ret;
+ bool changed = false;
+
+ if (!mstb->link_address_sent) {
+ ret = drm_dp_send_link_address(mgr, mstb);
+ if (ret == 1)
+ changed = true;
+ else if (ret < 0)
+ return ret;
+ }
list_for_each_entry(port, &mstb->ports, next) {
- if (port->input)
- continue;
+ struct drm_dp_mst_branch *mstb_child = NULL;
- if (!port->ddps)
+ if (port->input || !port->ddps)
continue;
- if (!port->available_pbn)
+ if (!port->available_pbn) {
+ drm_modeset_lock(&mgr->base.lock, NULL);
drm_dp_send_enum_path_resources(mgr, mstb, port);
+ drm_modeset_unlock(&mgr->base.lock);
+ changed = true;
+ }
- if (port->mstb) {
+ if (port->mstb)
mstb_child = drm_dp_mst_topology_get_mstb_validated(
mgr, port->mstb);
- if (mstb_child) {
- drm_dp_check_and_send_link_address(mgr, mstb_child);
- drm_dp_mst_topology_put_mstb(mstb_child);
- }
+
+ if (mstb_child) {
+ ret = drm_dp_check_and_send_link_address(mgr,
+ mstb_child);
+ drm_dp_mst_topology_put_mstb(mstb_child);
+ if (ret == 1)
+ changed = true;
+ else if (ret < 0)
+ return ret;
}
}
+
+ return changed;
}
static void drm_dp_mst_link_probe_work(struct work_struct *work)
{
- struct drm_dp_mst_topology_mgr *mgr = container_of(work, struct drm_dp_mst_topology_mgr, work);
+ struct drm_dp_mst_topology_mgr *mgr =
+ container_of(work, struct drm_dp_mst_topology_mgr, work);
+ struct drm_device *dev = mgr->dev;
struct drm_dp_mst_branch *mstb;
int ret;
+ mutex_lock(&mgr->probe_lock);
+
mutex_lock(&mgr->lock);
mstb = mgr->mst_primary;
if (mstb) {
@@ -2173,10 +2531,17 @@ static void drm_dp_mst_link_probe_work(struct work_struct *work)
mstb = NULL;
}
mutex_unlock(&mgr->lock);
- if (mstb) {
- drm_dp_check_and_send_link_address(mgr, mstb);
- drm_dp_mst_topology_put_mstb(mstb);
+ if (!mstb) {
+ mutex_unlock(&mgr->probe_lock);
+ return;
}
+
+ ret = drm_dp_check_and_send_link_address(mgr, mstb);
+ drm_dp_mst_topology_put_mstb(mstb);
+
+ mutex_unlock(&mgr->probe_lock);
+ if (ret)
+ drm_kms_helper_hotplug_event(dev);
}
static bool drm_dp_validate_guid(struct drm_dp_mst_topology_mgr *mgr,
@@ -2422,16 +2787,18 @@ drm_dp_dump_link_address(struct drm_dp_link_address_ack_reply *reply)
}
}
-static void drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr,
+static int drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr,
struct drm_dp_mst_branch *mstb)
{
struct drm_dp_sideband_msg_tx *txmsg;
struct drm_dp_link_address_ack_reply *reply;
- int i, len, ret;
+ struct drm_dp_mst_port *port, *tmp;
+ int i, len, ret, port_mask = 0;
+ bool changed = false;
txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL);
if (!txmsg)
- return;
+ return -ENOMEM;
txmsg->dst = mstb;
len = build_link_address(txmsg);
@@ -2457,16 +2824,39 @@ static void drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr,
drm_dp_check_mstb_guid(mstb, reply->guid);
- for (i = 0; i < reply->nports; i++)
- drm_dp_mst_handle_link_address_port(mstb, mgr->dev,
- &reply->ports[i]);
+ for (i = 0; i < reply->nports; i++) {
+ port_mask |= BIT(reply->ports[i].port_number);
+ ret = drm_dp_mst_handle_link_address_port(mstb, mgr->dev,
+ &reply->ports[i]);
+ if (ret == 1)
+ changed = true;
+ else if (ret < 0)
+ goto out;
+ }
- drm_kms_helper_hotplug_event(mgr->dev);
+ /* Prune any ports that are currently a part of mstb in our in-memory
+ * topology, but were not seen in this link address. Usually this
+ * means that they were removed while the topology was out of sync,
+ * e.g. during suspend/resume
+ */
+ mutex_lock(&mgr->lock);
+ list_for_each_entry_safe(port, tmp, &mstb->ports, next) {
+ if (port_mask & BIT(port->port_num))
+ continue;
+
+ DRM_DEBUG_KMS("port %d was not in link address, removing\n",
+ port->port_num);
+ list_del(&port->next);
+ drm_dp_mst_topology_put_port(port);
+ changed = true;
+ }
+ mutex_unlock(&mgr->lock);
out:
if (ret <= 0)
mstb->link_address_sent = false;
kfree(txmsg);
+ return ret < 0 ? ret : changed;
}
static int
@@ -3071,6 +3461,23 @@ out_unlock:
}
EXPORT_SYMBOL(drm_dp_mst_topology_mgr_set_mst);
+static void
+drm_dp_mst_topology_mgr_invalidate_mstb(struct drm_dp_mst_branch *mstb)
+{
+ struct drm_dp_mst_port *port;
+
+ /* The link address will need to be re-sent on resume */
+ mstb->link_address_sent = false;
+
+ list_for_each_entry(port, &mstb->ports, next) {
+ /* The PBN for each port will also need to be re-probed */
+ port->available_pbn = 0;
+
+ if (port->mstb)
+ drm_dp_mst_topology_mgr_invalidate_mstb(port->mstb);
+ }
+}
+
/**
* drm_dp_mst_topology_mgr_suspend() - suspend the MST manager
* @mgr: manager to suspend
@@ -3084,62 +3491,89 @@ void drm_dp_mst_topology_mgr_suspend(struct drm_dp_mst_topology_mgr *mgr)
drm_dp_dpcd_writeb(mgr->aux, DP_MSTM_CTRL,
DP_MST_EN | DP_UPSTREAM_IS_SRC);
mutex_unlock(&mgr->lock);
+ flush_work(&mgr->up_req_work);
flush_work(&mgr->work);
- flush_work(&mgr->destroy_connector_work);
+ flush_work(&mgr->delayed_destroy_work);
+
+ mutex_lock(&mgr->lock);
+ if (mgr->mst_state && mgr->mst_primary)
+ drm_dp_mst_topology_mgr_invalidate_mstb(mgr->mst_primary);
+ mutex_unlock(&mgr->lock);
}
EXPORT_SYMBOL(drm_dp_mst_topology_mgr_suspend);
/**
* drm_dp_mst_topology_mgr_resume() - resume the MST manager
* @mgr: manager to resume
+ * @sync: whether or not to perform topology reprobing synchronously
*
* This will fetch DPCD and see if the device is still there,
* if it is, it will rewrite the MSTM control bits, and return.
*
- * if the device fails this returns -1, and the driver should do
+ * If the device fails this returns -1, and the driver should do
* a full MST reprobe, in case we were undocked.
+ *
+ * During system resume (where it is assumed that the driver will be calling
+ * drm_atomic_helper_resume()) this function should be called beforehand with
+ * @sync set to true. In contexts like runtime resume where the driver is not
+ * expected to be calling drm_atomic_helper_resume(), this function should be
+ * called with @sync set to false in order to avoid deadlocking.
+ *
+ * Returns: -1 if the MST topology was removed while we were suspended, 0
+ * otherwise.
*/
-int drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr)
+int drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr,
+ bool sync)
{
- int ret = 0;
+ int ret;
+ u8 guid[16];
mutex_lock(&mgr->lock);
+ if (!mgr->mst_primary)
+ goto out_fail;
- if (mgr->mst_primary) {
- int sret;
- u8 guid[16];
+ ret = drm_dp_dpcd_read(mgr->aux, DP_DPCD_REV, mgr->dpcd,
+ DP_RECEIVER_CAP_SIZE);
+ if (ret != DP_RECEIVER_CAP_SIZE) {
+ DRM_DEBUG_KMS("dpcd read failed - undocked during suspend?\n");
+ goto out_fail;
+ }
- sret = drm_dp_dpcd_read(mgr->aux, DP_DPCD_REV, mgr->dpcd, DP_RECEIVER_CAP_SIZE);
- if (sret != DP_RECEIVER_CAP_SIZE) {
- DRM_DEBUG_KMS("dpcd read failed - undocked during suspend?\n");
- ret = -1;
- goto out_unlock;
- }
+ ret = drm_dp_dpcd_writeb(mgr->aux, DP_MSTM_CTRL,
+ DP_MST_EN |
+ DP_UP_REQ_EN |
+ DP_UPSTREAM_IS_SRC);
+ if (ret < 0) {
+ DRM_DEBUG_KMS("mst write failed - undocked during suspend?\n");
+ goto out_fail;
+ }
- ret = drm_dp_dpcd_writeb(mgr->aux, DP_MSTM_CTRL,
- DP_MST_EN | DP_UP_REQ_EN | DP_UPSTREAM_IS_SRC);
- if (ret < 0) {
- DRM_DEBUG_KMS("mst write failed - undocked during suspend?\n");
- ret = -1;
- goto out_unlock;
- }
+ /* Some hubs forget their guids after they resume */
+ ret = drm_dp_dpcd_read(mgr->aux, DP_GUID, guid, 16);
+ if (ret != 16) {
+ DRM_DEBUG_KMS("dpcd read failed - undocked during suspend?\n");
+ goto out_fail;
+ }
+ drm_dp_check_mstb_guid(mgr->mst_primary, guid);
- /* Some hubs forget their guids after they resume */
- sret = drm_dp_dpcd_read(mgr->aux, DP_GUID, guid, 16);
- if (sret != 16) {
- DRM_DEBUG_KMS("dpcd read failed - undocked during suspend?\n");
- ret = -1;
- goto out_unlock;
- }
- drm_dp_check_mstb_guid(mgr->mst_primary, guid);
+ /*
+ * For the final step of resuming the topology, we need to bring the
+ * state of our in-memory topology back into sync with reality. So,
+ * restart the probing process as if we're probing a new hub
+ */
+ queue_work(system_long_wq, &mgr->work);
+ mutex_unlock(&mgr->lock);
- ret = 0;
- } else
- ret = -1;
+ if (sync) {
+ DRM_DEBUG_KMS("Waiting for link probe work to finish re-syncing topology...\n");
+ flush_work(&mgr->work);
+ }
-out_unlock:
+ return 0;
+
+out_fail:
mutex_unlock(&mgr->lock);
- return ret;
+ return -1;
}
EXPORT_SYMBOL(drm_dp_mst_topology_mgr_resume);
@@ -3256,12 +3690,78 @@ clear_down_rep_recv:
return 0;
}
+static inline bool
+drm_dp_mst_process_up_req(struct drm_dp_mst_topology_mgr *mgr,
+ struct drm_dp_pending_up_req *up_req)
+{
+ struct drm_dp_mst_branch *mstb = NULL;
+ struct drm_dp_sideband_msg_req_body *msg = &up_req->msg;
+ struct drm_dp_sideband_msg_hdr *hdr = &up_req->hdr;
+ bool hotplug = false;
+
+ if (hdr->broadcast) {
+ const u8 *guid = NULL;
+
+ if (msg->req_type == DP_CONNECTION_STATUS_NOTIFY)
+ guid = msg->u.conn_stat.guid;
+ else if (msg->req_type == DP_RESOURCE_STATUS_NOTIFY)
+ guid = msg->u.resource_stat.guid;
+
+ mstb = drm_dp_get_mst_branch_device_by_guid(mgr, guid);
+ } else {
+ mstb = drm_dp_get_mst_branch_device(mgr, hdr->lct, hdr->rad);
+ }
+
+ if (!mstb) {
+ DRM_DEBUG_KMS("Got MST reply from unknown device %d\n",
+ hdr->lct);
+ return false;
+ }
+
+ /* TODO: Add missing handler for DP_RESOURCE_STATUS_NOTIFY events */
+ if (msg->req_type == DP_CONNECTION_STATUS_NOTIFY) {
+ drm_dp_mst_handle_conn_stat(mstb, &msg->u.conn_stat);
+ hotplug = true;
+ }
+
+ drm_dp_mst_topology_put_mstb(mstb);
+ return hotplug;
+}
+
+static void drm_dp_mst_up_req_work(struct work_struct *work)
+{
+ struct drm_dp_mst_topology_mgr *mgr =
+ container_of(work, struct drm_dp_mst_topology_mgr,
+ up_req_work);
+ struct drm_dp_pending_up_req *up_req;
+ bool send_hotplug = false;
+
+ mutex_lock(&mgr->probe_lock);
+ while (true) {
+ mutex_lock(&mgr->up_req_lock);
+ up_req = list_first_entry_or_null(&mgr->up_req_list,
+ struct drm_dp_pending_up_req,
+ next);
+ if (up_req)
+ list_del(&up_req->next);
+ mutex_unlock(&mgr->up_req_lock);
+
+ if (!up_req)
+ break;
+
+ send_hotplug |= drm_dp_mst_process_up_req(mgr, up_req);
+ kfree(up_req);
+ }
+ mutex_unlock(&mgr->probe_lock);
+
+ if (send_hotplug)
+ drm_kms_helper_hotplug_event(mgr->dev);
+}
+
static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr)
{
- struct drm_dp_sideband_msg_req_body msg;
struct drm_dp_sideband_msg_hdr *hdr = &mgr->up_req_recv.initial_hdr;
- struct drm_dp_mst_branch *mstb = NULL;
- const u8 *guid;
+ struct drm_dp_pending_up_req *up_req;
bool seqno;
if (!drm_dp_get_one_sb_msg(mgr, true))
@@ -3270,56 +3770,53 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr)
if (!mgr->up_req_recv.have_eomt)
return 0;
- if (!hdr->broadcast) {
- mstb = drm_dp_get_mst_branch_device(mgr, hdr->lct, hdr->rad);
- if (!mstb) {
- DRM_DEBUG_KMS("Got MST reply from unknown device %d\n",
- hdr->lct);
- goto out;
- }
+ up_req = kzalloc(sizeof(*up_req), GFP_KERNEL);
+ if (!up_req) {
+ DRM_ERROR("Not enough memory to process MST up req\n");
+ return -ENOMEM;
}
+ INIT_LIST_HEAD(&up_req->next);
seqno = hdr->seqno;
- drm_dp_sideband_parse_req(&mgr->up_req_recv, &msg);
+ drm_dp_sideband_parse_req(&mgr->up_req_recv, &up_req->msg);
- if (msg.req_type == DP_CONNECTION_STATUS_NOTIFY)
- guid = msg.u.conn_stat.guid;
- else if (msg.req_type == DP_RESOURCE_STATUS_NOTIFY)
- guid = msg.u.resource_stat.guid;
- else
+ if (up_req->msg.req_type != DP_CONNECTION_STATUS_NOTIFY &&
+ up_req->msg.req_type != DP_RESOURCE_STATUS_NOTIFY) {
+ DRM_DEBUG_KMS("Received unknown up req type, ignoring: %x\n",
+ up_req->msg.req_type);
+ kfree(up_req);
goto out;
-
- drm_dp_send_up_ack_reply(mgr, mgr->mst_primary, msg.req_type, seqno,
- false);
-
- if (!mstb) {
- mstb = drm_dp_get_mst_branch_device_by_guid(mgr, guid);
- if (!mstb) {
- DRM_DEBUG_KMS("Got MST reply from unknown device %d\n",
- hdr->lct);
- goto out;
- }
}
- if (msg.req_type == DP_CONNECTION_STATUS_NOTIFY) {
- drm_dp_mst_handle_conn_stat(mstb, &msg.u.conn_stat);
+ drm_dp_send_up_ack_reply(mgr, mgr->mst_primary, up_req->msg.req_type,
+ seqno, false);
+
+ if (up_req->msg.req_type == DP_CONNECTION_STATUS_NOTIFY) {
+ const struct drm_dp_connection_status_notify *conn_stat =
+ &up_req->msg.u.conn_stat;
DRM_DEBUG_KMS("Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n",
- msg.u.conn_stat.port_number,
- msg.u.conn_stat.legacy_device_plug_status,
- msg.u.conn_stat.displayport_device_plug_status,
- msg.u.conn_stat.message_capability_status,
- msg.u.conn_stat.input_port,
- msg.u.conn_stat.peer_device_type);
+ conn_stat->port_number,
+ conn_stat->legacy_device_plug_status,
+ conn_stat->displayport_device_plug_status,
+ conn_stat->message_capability_status,
+ conn_stat->input_port,
+ conn_stat->peer_device_type);
+ } else if (up_req->msg.req_type == DP_RESOURCE_STATUS_NOTIFY) {
+ const struct drm_dp_resource_status_notify *res_stat =
+ &up_req->msg.u.resource_stat;
- drm_kms_helper_hotplug_event(mgr->dev);
- } else if (msg.req_type == DP_RESOURCE_STATUS_NOTIFY) {
DRM_DEBUG_KMS("Got RSN: pn: %d avail_pbn %d\n",
- msg.u.resource_stat.port_number,
- msg.u.resource_stat.available_pbn);
+ res_stat->port_number,
+ res_stat->available_pbn);
}
- drm_dp_mst_topology_put_mstb(mstb);
+ up_req->hdr = *hdr;
+ mutex_lock(&mgr->up_req_lock);
+ list_add_tail(&up_req->next, &mgr->up_req_list);
+ mutex_unlock(&mgr->up_req_lock);
+ queue_work(system_long_wq, &mgr->up_req_work);
+
out:
memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
return 0;
@@ -3366,22 +3863,31 @@ EXPORT_SYMBOL(drm_dp_mst_hpd_irq);
/**
* drm_dp_mst_detect_port() - get connection status for an MST port
* @connector: DRM connector for this port
+ * @ctx: The acquisition context to use for grabbing locks
* @mgr: manager for this port
- * @port: unverified pointer to a port
+ * @port: pointer to a port
*
- * This returns the current connection state for a port. It validates the
- * port pointer still exists so the caller doesn't require a reference
+ * This returns the current connection state for a port.
*/
-enum drm_connector_status drm_dp_mst_detect_port(struct drm_connector *connector,
- struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port)
+int
+drm_dp_mst_detect_port(struct drm_connector *connector,
+ struct drm_modeset_acquire_ctx *ctx,
+ struct drm_dp_mst_topology_mgr *mgr,
+ struct drm_dp_mst_port *port)
{
- enum drm_connector_status status = connector_status_disconnected;
+ int ret;
/* we need to search for the port in the mgr in case it's gone */
port = drm_dp_mst_topology_get_port_validated(mgr, port);
if (!port)
return connector_status_disconnected;
+ ret = drm_modeset_lock(&mgr->base.lock, ctx);
+ if (ret)
+ goto out;
+
+ ret = connector_status_disconnected;
+
if (!port->ddps)
goto out;
@@ -3391,7 +3897,7 @@ enum drm_connector_status drm_dp_mst_detect_port(struct drm_connector *connector
break;
case DP_PEER_DEVICE_SST_SINK:
- status = connector_status_connected;
+ ret = connector_status_connected;
/* for logical ports - cache the EDID */
if (port->port_num >= 8 && !port->cached_edid) {
port->cached_edid = drm_get_edid(connector, &port->aux.ddc);
@@ -3399,12 +3905,12 @@ enum drm_connector_status drm_dp_mst_detect_port(struct drm_connector *connector
break;
case DP_PEER_DEVICE_DP_LEGACY_CONV:
if (port->ldps)
- status = connector_status_connected;
+ ret = connector_status_connected;
break;
}
out:
drm_dp_mst_topology_put_port(port);
- return status;
+ return ret;
}
EXPORT_SYMBOL(drm_dp_mst_detect_port);
@@ -3994,34 +4500,103 @@ static void drm_dp_tx_work(struct work_struct *work)
mutex_unlock(&mgr->qlock);
}
-static void drm_dp_destroy_connector_work(struct work_struct *work)
+static inline void
+drm_dp_delayed_destroy_port(struct drm_dp_mst_port *port)
{
- struct drm_dp_mst_topology_mgr *mgr = container_of(work, struct drm_dp_mst_topology_mgr, destroy_connector_work);
- struct drm_dp_mst_port *port;
- bool send_hotplug = false;
+ if (port->connector)
+ port->mgr->cbs->destroy_connector(port->mgr, port->connector);
+
+ drm_dp_port_set_pdt(port, DP_PEER_DEVICE_NONE);
+ drm_dp_mst_put_port_malloc(port);
+}
+
+static inline void
+drm_dp_delayed_destroy_mstb(struct drm_dp_mst_branch *mstb)
+{
+ struct drm_dp_mst_topology_mgr *mgr = mstb->mgr;
+ struct drm_dp_mst_port *port, *tmp;
+ bool wake_tx = false;
+
+ mutex_lock(&mgr->lock);
+ list_for_each_entry_safe(port, tmp, &mstb->ports, next) {
+ list_del(&port->next);
+ drm_dp_mst_topology_put_port(port);
+ }
+ mutex_unlock(&mgr->lock);
+
+ /* drop any tx slots msg */
+ mutex_lock(&mstb->mgr->qlock);
+ if (mstb->tx_slots[0]) {
+ mstb->tx_slots[0]->state = DRM_DP_SIDEBAND_TX_TIMEOUT;
+ mstb->tx_slots[0] = NULL;
+ wake_tx = true;
+ }
+ if (mstb->tx_slots[1]) {
+ mstb->tx_slots[1]->state = DRM_DP_SIDEBAND_TX_TIMEOUT;
+ mstb->tx_slots[1] = NULL;
+ wake_tx = true;
+ }
+ mutex_unlock(&mstb->mgr->qlock);
+
+ if (wake_tx)
+ wake_up_all(&mstb->mgr->tx_waitq);
+
+ drm_dp_mst_put_mstb_malloc(mstb);
+}
+
+static void drm_dp_delayed_destroy_work(struct work_struct *work)
+{
+ struct drm_dp_mst_topology_mgr *mgr =
+ container_of(work, struct drm_dp_mst_topology_mgr,
+ delayed_destroy_work);
+ bool send_hotplug = false, go_again;
+
/*
* Not a regular list traverse as we have to drop the destroy
- * connector lock before destroying the connector, to avoid AB->BA
+ * connector lock before destroying the mstb/port, to avoid AB->BA
* ordering between this lock and the config mutex.
*/
- for (;;) {
- mutex_lock(&mgr->destroy_connector_lock);
- port = list_first_entry_or_null(&mgr->destroy_connector_list, struct drm_dp_mst_port, next);
- if (!port) {
- mutex_unlock(&mgr->destroy_connector_lock);
- break;
+ do {
+ go_again = false;
+
+ for (;;) {
+ struct drm_dp_mst_branch *mstb;
+
+ mutex_lock(&mgr->delayed_destroy_lock);
+ mstb = list_first_entry_or_null(&mgr->destroy_branch_device_list,
+ struct drm_dp_mst_branch,
+ destroy_next);
+ if (mstb)
+ list_del(&mstb->destroy_next);
+ mutex_unlock(&mgr->delayed_destroy_lock);
+
+ if (!mstb)
+ break;
+
+ drm_dp_delayed_destroy_mstb(mstb);
+ go_again = true;
}
- list_del(&port->next);
- mutex_unlock(&mgr->destroy_connector_lock);
- mgr->cbs->destroy_connector(mgr, port->connector);
+ for (;;) {
+ struct drm_dp_mst_port *port;
- drm_dp_port_teardown_pdt(port, port->pdt);
- port->pdt = DP_PEER_DEVICE_NONE;
+ mutex_lock(&mgr->delayed_destroy_lock);
+ port = list_first_entry_or_null(&mgr->destroy_port_list,
+ struct drm_dp_mst_port,
+ next);
+ if (port)
+ list_del(&port->next);
+ mutex_unlock(&mgr->delayed_destroy_lock);
+
+ if (!port)
+ break;
+
+ drm_dp_delayed_destroy_port(port);
+ send_hotplug = true;
+ go_again = true;
+ }
+ } while (go_again);
- drm_dp_mst_put_port_malloc(port);
- send_hotplug = true;
- }
if (send_hotplug)
drm_kms_helper_hotplug_event(mgr->dev);
}
@@ -4208,12 +4783,20 @@ int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr,
mutex_init(&mgr->lock);
mutex_init(&mgr->qlock);
mutex_init(&mgr->payload_lock);
- mutex_init(&mgr->destroy_connector_lock);
+ mutex_init(&mgr->delayed_destroy_lock);
+ mutex_init(&mgr->up_req_lock);
+ mutex_init(&mgr->probe_lock);
+#if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)
+ mutex_init(&mgr->topology_ref_history_lock);
+#endif
INIT_LIST_HEAD(&mgr->tx_msg_downq);
- INIT_LIST_HEAD(&mgr->destroy_connector_list);
+ INIT_LIST_HEAD(&mgr->destroy_port_list);
+ INIT_LIST_HEAD(&mgr->destroy_branch_device_list);
+ INIT_LIST_HEAD(&mgr->up_req_list);
INIT_WORK(&mgr->work, drm_dp_mst_link_probe_work);
INIT_WORK(&mgr->tx_work, drm_dp_tx_work);
- INIT_WORK(&mgr->destroy_connector_work, drm_dp_destroy_connector_work);
+ INIT_WORK(&mgr->delayed_destroy_work, drm_dp_delayed_destroy_work);
+ INIT_WORK(&mgr->up_req_work, drm_dp_mst_up_req_work);
init_waitqueue_head(&mgr->tx_waitq);
mgr->dev = dev;
mgr->aux = aux;
@@ -4254,7 +4837,7 @@ void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr)
{
drm_dp_mst_topology_mgr_set_mst(mgr, false);
flush_work(&mgr->work);
- flush_work(&mgr->destroy_connector_work);
+ cancel_work_sync(&mgr->delayed_destroy_work);
mutex_lock(&mgr->payload_lock);
kfree(mgr->payloads);
mgr->payloads = NULL;
@@ -4266,10 +4849,15 @@ void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr)
drm_atomic_private_obj_fini(&mgr->base);
mgr->funcs = NULL;
- mutex_destroy(&mgr->destroy_connector_lock);
+ mutex_destroy(&mgr->delayed_destroy_lock);
mutex_destroy(&mgr->payload_lock);
mutex_destroy(&mgr->qlock);
mutex_destroy(&mgr->lock);
+ mutex_destroy(&mgr->up_req_lock);
+ mutex_destroy(&mgr->probe_lock);
+#if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)
+ mutex_destroy(&mgr->topology_ref_history_lock);
+#endif
}
EXPORT_SYMBOL(drm_dp_mst_topology_mgr_destroy);
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 5eeafa45831a..403b593a3eb4 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -7625,7 +7625,8 @@ void intel_dp_mst_resume(struct drm_i915_private *dev_priv)
if (!intel_dp->can_mst)
continue;
- ret = drm_dp_mst_topology_mgr_resume(&intel_dp->mst_mgr);
+ ret = drm_dp_mst_topology_mgr_resume(&intel_dp->mst_mgr,
+ true);
if (ret) {
intel_dp->is_mst = false;
drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index bbcab27644dc..a9962846a503 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -391,20 +391,7 @@ static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
return ret;
}
-static enum drm_connector_status
-intel_dp_mst_detect(struct drm_connector *connector, bool force)
-{
- struct intel_connector *intel_connector = to_intel_connector(connector);
- struct intel_dp *intel_dp = intel_connector->mst_port;
-
- if (drm_connector_is_unregistered(connector))
- return connector_status_disconnected;
- return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr,
- intel_connector->port);
-}
-
static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
- .detect = intel_dp_mst_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.atomic_get_property = intel_digital_connector_atomic_get_property,
.atomic_set_property = intel_digital_connector_atomic_set_property,
@@ -465,11 +452,26 @@ static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *c
return &intel_dp->mst_encoders[crtc->pipe]->base.base;
}
+static int
+intel_dp_mst_detect(struct drm_connector *connector,
+ struct drm_modeset_acquire_ctx *ctx, bool force)
+{
+ struct intel_connector *intel_connector = to_intel_connector(connector);
+ struct intel_dp *intel_dp = intel_connector->mst_port;
+
+ if (drm_connector_is_unregistered(connector))
+ return connector_status_disconnected;
+
+ return drm_dp_mst_detect_port(connector, ctx, &intel_dp->mst_mgr,
+ intel_connector->port);
+}
+
static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
.get_modes = intel_dp_mst_get_modes,
.mode_valid = intel_dp_mst_mode_valid,
.atomic_best_encoder = intel_mst_atomic_best_encoder,
.atomic_check = intel_dp_mst_atomic_check,
+ .detect_ctx = intel_dp_mst_detect,
};
static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index a13924ae1992..549486f1d937 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -986,20 +986,11 @@ nv50_mstc_atomic_check(struct drm_connector *connector,
return drm_dp_atomic_release_vcpi_slots(state, mgr, mstc->port);
}
-static const struct drm_connector_helper_funcs
-nv50_mstc_help = {
- .get_modes = nv50_mstc_get_modes,
- .mode_valid = nv50_mstc_mode_valid,
- .best_encoder = nv50_mstc_best_encoder,
- .atomic_best_encoder = nv50_mstc_atomic_best_encoder,
- .atomic_check = nv50_mstc_atomic_check,
-};
-
-static enum drm_connector_status
-nv50_mstc_detect(struct drm_connector *connector, bool force)
+static int
+nv50_mstc_detect(struct drm_connector *connector,
+ struct drm_modeset_acquire_ctx *ctx, bool force)
{
struct nv50_mstc *mstc = nv50_mstc(connector);
- enum drm_connector_status conn_status;
int ret;
if (drm_connector_is_unregistered(connector))
@@ -1009,14 +1000,24 @@ nv50_mstc_detect(struct drm_connector *connector, bool force)
if (ret < 0 && ret != -EACCES)
return connector_status_disconnected;
- conn_status = drm_dp_mst_detect_port(connector, mstc->port->mgr,
- mstc->port);
+ ret = drm_dp_mst_detect_port(connector, ctx, mstc->port->mgr,
+ mstc->port);
pm_runtime_mark_last_busy(connector->dev->dev);
pm_runtime_put_autosuspend(connector->dev->dev);
- return conn_status;
+ return ret;
}
+static const struct drm_connector_helper_funcs
+nv50_mstc_help = {
+ .get_modes = nv50_mstc_get_modes,
+ .mode_valid = nv50_mstc_mode_valid,
+ .best_encoder = nv50_mstc_best_encoder,
+ .atomic_best_encoder = nv50_mstc_atomic_best_encoder,
+ .atomic_check = nv50_mstc_atomic_check,
+ .detect_ctx = nv50_mstc_detect,
+};
+
static void
nv50_mstc_destroy(struct drm_connector *connector)
{
@@ -1031,7 +1032,6 @@ nv50_mstc_destroy(struct drm_connector *connector)
static const struct drm_connector_funcs
nv50_mstc = {
.reset = nouveau_conn_reset,
- .detect = nv50_mstc_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = nv50_mstc_destroy,
.atomic_duplicate_state = nouveau_conn_atomic_duplicate_state,
@@ -1309,14 +1309,14 @@ nv50_mstm_fini(struct nv50_mstm *mstm)
}
static void
-nv50_mstm_init(struct nv50_mstm *mstm)
+nv50_mstm_init(struct nv50_mstm *mstm, bool runtime)
{
int ret;
if (!mstm || !mstm->mgr.mst_state)
return;
- ret = drm_dp_mst_topology_mgr_resume(&mstm->mgr);
+ ret = drm_dp_mst_topology_mgr_resume(&mstm->mgr, !runtime);
if (ret == -1) {
drm_dp_mst_topology_mgr_set_mst(&mstm->mgr, false);
drm_kms_helper_hotplug_event(mstm->mgr.dev);
@@ -2263,7 +2263,7 @@ nv50_display_init(struct drm_device *dev, bool resume, bool runtime)
if (encoder->encoder_type != DRM_MODE_ENCODER_DPMST) {
struct nouveau_encoder *nv_encoder =
nouveau_encoder(encoder);
- nv50_mstm_init(nv_encoder->dp.mstm);
+ nv50_mstm_init(nv_encoder->dp.mstm, runtime);
}
}
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 3a5db17bc5c7..5b413588b823 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -1130,6 +1130,16 @@ nouveau_connector_hotplug(struct nvif_notify *notify)
const char *name = connector->name;
struct nouveau_encoder *nv_encoder;
int ret;
+ bool plugged = (rep->mask != NVIF_NOTIFY_CONN_V0_UNPLUG);
+
+ if (rep->mask & NVIF_NOTIFY_CONN_V0_IRQ) {
+ NV_DEBUG(drm, "service %s\n", name);
+ drm_dp_cec_irq(&nv_connector->aux);
+ if ((nv_encoder = find_encoder(connector, DCB_OUTPUT_DP)))
+ nv50_mstm_service(nv_encoder->dp.mstm);
+
+ return NVIF_NOTIFY_KEEP;
+ }
ret = pm_runtime_get(drm->dev->dev);
if (ret == 0) {
@@ -1150,25 +1160,16 @@ nouveau_connector_hotplug(struct nvif_notify *notify)
return NVIF_NOTIFY_DROP;
}
- if (rep->mask & NVIF_NOTIFY_CONN_V0_IRQ) {
- NV_DEBUG(drm, "service %s\n", name);
- drm_dp_cec_irq(&nv_connector->aux);
- if ((nv_encoder = find_encoder(connector, DCB_OUTPUT_DP)))
- nv50_mstm_service(nv_encoder->dp.mstm);
- } else {
- bool plugged = (rep->mask != NVIF_NOTIFY_CONN_V0_UNPLUG);
-
+ if (!plugged)
+ drm_dp_cec_unset_edid(&nv_connector->aux);
+ NV_DEBUG(drm, "%splugged %s\n", plugged ? "" : "un", name);
+ if ((nv_encoder = find_encoder(connector, DCB_OUTPUT_DP))) {
if (!plugged)
- drm_dp_cec_unset_edid(&nv_connector->aux);
- NV_DEBUG(drm, "%splugged %s\n", plugged ? "" : "un", name);
- if ((nv_encoder = find_encoder(connector, DCB_OUTPUT_DP))) {
- if (!plugged)
- nv50_mstm_remove(nv_encoder->dp.mstm);
- }
-
- drm_helper_hpd_irq_event(connector->dev);
+ nv50_mstm_remove(nv_encoder->dp.mstm);
}
+ drm_helper_hpd_irq_event(connector->dev);
+
pm_runtime_mark_last_busy(drm->dev->dev);
pm_runtime_put_autosuspend(drm->dev->dev);
return NVIF_NOTIFY_KEEP;
diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c
index 6f038511a03a..53f9bceaf17a 100644
--- a/drivers/gpu/drm/nouveau/nouveau_display.c
+++ b/drivers/gpu/drm/nouveau/nouveau_display.c
@@ -407,6 +407,17 @@ nouveau_display_init(struct drm_device *dev, bool resume, bool runtime)
struct drm_connector_list_iter conn_iter;
int ret;
+ /*
+ * Enable hotplug interrupts (done as early as possible, since we need
+ * them for MST)
+ */
+ drm_connector_list_iter_begin(dev, &conn_iter);
+ nouveau_for_each_non_mst_connector_iter(connector, &conn_iter) {
+ struct nouveau_connector *conn = nouveau_connector(connector);
+ nvif_notify_get(&conn->hpd);
+ }
+ drm_connector_list_iter_end(&conn_iter);
+
ret = disp->init(dev, resume, runtime);
if (ret)
return ret;
@@ -416,14 +427,6 @@ nouveau_display_init(struct drm_device *dev, bool resume, bool runtime)
*/
drm_kms_helper_poll_enable(dev);
- /* enable hotplug interrupts */
- drm_connector_list_iter_begin(dev, &conn_iter);
- nouveau_for_each_non_mst_connector_iter(connector, &conn_iter) {
- struct nouveau_connector *conn = nouveau_connector(connector);
- nvif_notify_get(&conn->hpd);
- }
- drm_connector_list_iter_end(&conn_iter);
-
return ret;
}
diff --git a/drivers/gpu/drm/radeon/radeon_dp_mst.c b/drivers/gpu/drm/radeon/radeon_dp_mst.c
index 2994f07fbad9..ee28f5b3785e 100644
--- a/drivers/gpu/drm/radeon/radeon_dp_mst.c
+++ b/drivers/gpu/drm/radeon/radeon_dp_mst.c
@@ -233,21 +233,26 @@ drm_encoder *radeon_mst_best_encoder(struct drm_connector *connector)
return &radeon_connector->mst_encoder->base;
}
+static int
+radeon_dp_mst_detect(struct drm_connector *connector,
+ struct drm_modeset_acquire_ctx *ctx,
+ bool force)
+{
+ struct radeon_connector *radeon_connector =
+ to_radeon_connector(connector);
+ struct radeon_connector *master = radeon_connector->mst_port;
+
+ return drm_dp_mst_detect_port(connector, ctx, &master->mst_mgr,
+ radeon_connector->port);
+}
+
static const struct drm_connector_helper_funcs radeon_dp_mst_connector_helper_funcs = {
.get_modes = radeon_dp_mst_get_modes,
.mode_valid = radeon_dp_mst_mode_valid,
.best_encoder = radeon_mst_best_encoder,
+ .detect_ctx = radeon_dp_mst_detect,
};
-static enum drm_connector_status
-radeon_dp_mst_detect(struct drm_connector *connector, bool force)
-{
- struct radeon_connector *radeon_connector = to_radeon_connector(connector);
- struct radeon_connector *master = radeon_connector->mst_port;
-
- return drm_dp_mst_detect_port(connector, &master->mst_mgr, radeon_connector->port);
-}
-
static void
radeon_dp_mst_connector_destroy(struct drm_connector *connector)
{
@@ -262,7 +267,6 @@ radeon_dp_mst_connector_destroy(struct drm_connector *connector)
static const struct drm_connector_funcs radeon_dp_mst_connector_funcs = {
.dpms = drm_helper_connector_dpms,
- .detect = radeon_dp_mst_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = radeon_dp_mst_connector_destroy,
};