diff options
Diffstat (limited to 'drivers/gpu/drm/drm_dp_mst_topology.c')
| -rw-r--r-- | drivers/gpu/drm/drm_dp_mst_topology.c | 47 |
1 files changed, 34 insertions, 13 deletions
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index 86d13d6bc463..f3d79eda94bb 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -1668,13 +1668,10 @@ __dump_topology_ref_history(struct drm_dp_mst_topology_ref_history *history, 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; u32 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); + stack_depot_snprint(entry->backtrace, buf, PAGE_SIZE, 4); drm_printf(&p, " %d %ss (last at %5llu.%06u):\n%s", entry->count, @@ -3355,6 +3352,10 @@ static int drm_dp_destroy_payload_step2(struct drm_dp_mst_topology_mgr *mgr, /** * drm_dp_update_payload_part1() - Execute payload update part 1 * @mgr: manager to use. + * @start_slot: this is the cur slot + * + * NOTE: start_slot is a temporary workaround for non-atomic drivers, + * this will be removed when non-atomic mst helpers are moved out of the helper * * This iterates over all proposed virtual channels, and tries to * allocate space in the link for them. For 0->slots transitions, @@ -3365,12 +3366,12 @@ static int drm_dp_destroy_payload_step2(struct drm_dp_mst_topology_mgr *mgr, * after calling this the driver should generate ACT and payload * packets. */ -int drm_dp_update_payload_part1(struct drm_dp_mst_topology_mgr *mgr) +int drm_dp_update_payload_part1(struct drm_dp_mst_topology_mgr *mgr, int start_slot) { struct drm_dp_payload req_payload; struct drm_dp_mst_port *port; int i, j; - int cur_slots = 1; + int cur_slots = start_slot; bool skip; mutex_lock(&mgr->payload_lock); @@ -4334,10 +4335,6 @@ static int drm_dp_init_vcpi(struct drm_dp_mst_topology_mgr *mgr, { int ret; - /* max. time slots - one slot for MTP header */ - if (slots > 63) - return -ENOSPC; - vcpi->pbn = pbn; vcpi->aligned_pbn = slots * mgr->pbn_div; vcpi->num_slots = slots; @@ -4510,6 +4507,27 @@ int drm_dp_atomic_release_vcpi_slots(struct drm_atomic_state *state, EXPORT_SYMBOL(drm_dp_atomic_release_vcpi_slots); /** + * drm_dp_mst_update_slots() - updates the slot info depending on the DP ecoding format + * @mst_state: mst_state to update + * @link_encoding_cap: the ecoding format on the link + */ +void drm_dp_mst_update_slots(struct drm_dp_mst_topology_state *mst_state, uint8_t link_encoding_cap) +{ + if (link_encoding_cap == DP_CAP_ANSI_128B132B) { + mst_state->total_avail_slots = 64; + mst_state->start_slot = 0; + } else { + mst_state->total_avail_slots = 63; + mst_state->start_slot = 1; + } + + DRM_DEBUG_KMS("%s encoding format on mst_state 0x%p\n", + (link_encoding_cap == DP_CAP_ANSI_128B132B) ? "128b/132b":"8b/10b", + mst_state); +} +EXPORT_SYMBOL(drm_dp_mst_update_slots); + +/** * drm_dp_mst_allocate_vcpi() - Allocate a virtual channel * @mgr: manager for this port * @port: port to allocate a virtual channel for. @@ -4540,7 +4558,7 @@ bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, ret = drm_dp_init_vcpi(mgr, &port->vcpi, pbn, slots); if (ret) { - drm_dbg_kms(mgr->dev, "failed to init vcpi slots=%d max=63 ret=%d\n", + drm_dbg_kms(mgr->dev, "failed to init vcpi slots=%d ret=%d\n", DIV_ROUND_UP(pbn, mgr->pbn_div), ret); drm_dp_mst_topology_put_port(port); goto out; @@ -5228,7 +5246,7 @@ drm_dp_mst_atomic_check_vcpi_alloc_limit(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_topology_state *mst_state) { struct drm_dp_vcpi_allocation *vcpi; - int avail_slots = 63, payload_count = 0; + int avail_slots = mst_state->total_avail_slots, payload_count = 0; list_for_each_entry(vcpi, &mst_state->vcpis, next) { /* Releasing VCPI is always OK-even if the port is gone */ @@ -5257,7 +5275,7 @@ drm_dp_mst_atomic_check_vcpi_alloc_limit(struct drm_dp_mst_topology_mgr *mgr, } } drm_dbg_atomic(mgr->dev, "[MST MGR:%p] mst state %p VCPI avail=%d used=%d\n", - mgr, mst_state, avail_slots, 63 - avail_slots); + mgr, mst_state, avail_slots, mst_state->total_avail_slots - avail_slots); return 0; } @@ -5534,6 +5552,9 @@ int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr, if (mst_state == NULL) return -ENOMEM; + mst_state->total_avail_slots = 63; + mst_state->start_slot = 1; + mst_state->mgr = mgr; INIT_LIST_HEAD(&mst_state->vcpis); |