summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/drm_dp_mst_topology.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2017-11-16 07:42:10 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-16 07:42:10 +0300
commite60e1ee60630cafef5e430c2ae364877e061d980 (patch)
tree816aeef8fe8d4a2c6a1ebbc7a350839bac8dd4c2 /drivers/gpu/drm/drm_dp_mst_topology.c
parent5d352e69c60e54b5f04d6e337a1d2bf0dbf3d94a (diff)
parentf150891fd9878ef0d9197c4e8451ce67c3bdd014 (diff)
downloadlinux-e60e1ee60630cafef5e430c2ae364877e061d980.tar.xz
Merge tag 'drm-for-v4.15' of git://people.freedesktop.org/~airlied/linux
Pull drm updates from Dave Airlie: "This is the main drm pull request for v4.15. Core: - Atomic object lifetime fixes - Atomic iterator improvements - Sparse/smatch fixes - Legacy kms ioctls to be interruptible - EDID override improvements - fb/gem helper cleanups - Simple outreachy patches - Documentation improvements - Fix dma-buf rcu races - DRM mode object leasing for improving VR use cases. - vgaarb improvements for non-x86 platforms. New driver: - tve200: Faraday Technology TVE200 block. This "TV Encoder" encodes a ITU-T BT.656 stream and can be found in the StorLink SL3516 (later Cortina Systems CS3516) as well as the Grain Media GM8180. New bridges: - SiI9234 support New panels: - S6E63J0X03, OTM8009A, Seiko 43WVF1G, 7" rpi touch panel, Toshiba LT089AC19000, Innolux AT043TN24 i915: - Remove Coffeelake from alpha support - Cannonlake workarounds - Infoframe refactoring for DisplayPort - VBT updates - DisplayPort vswing/emph/buffer translation refactoring - CCS fixes - Restore GPU clock boost on missed vblanks - Scatter list updates for userptr allocations - Gen9+ transition watermarks - Display IPC (Isochronous Priority Control) - Private PAT management - GVT: improved error handling and pci config sanitizing - Execlist refactoring - Transparent Huge Page support - User defined priorities support - HuC/GuC firmware refactoring - DP MST fixes - eDP power sequencing fixes - Use RCU instead of stop_machine - PSR state tracking support - Eviction fixes - BDW DP aux channel timeout fixes - LSPCON fixes - Cannonlake PLL fixes amdgpu: - Per VM BO support - Powerplay cleanups - CI powerplay support - PASID mgr for kfd - SR-IOV fixes - initial GPU reset for vega10 - Prime mmap support - TTM updates - Clock query interface for Raven - Fence to handle ioctl - UVD encode ring support on Polaris - Transparent huge page DMA support - Compute LRU pipe tweaks - BO flag to allow buffers to opt out of implicit sync - CTX priority setting API - VRAM lost infrastructure plumbing qxl: - fix flicker since atomic rework amdkfd: - Further improvements from internal AMD tree - Usermode events - Drop radeon support nouveau: - Pascal temperature sensor support - Improved BAR2 handling - MMU rework to support Pascal MMU exynos: - Improved HDMI/mixer support - HDMI audio interface support tegra: - Prep work for tegra186 - Cleanup/fixes msm: - Preemption support for a5xx - Display fixes for 8x96 (snapdragon 820) - Async cursor plane fixes - FW loading rework - GPU debugging improvements vc4: - Prep for DSI panels - fix T-format tiling scanout - New madvise ioctl Rockchip: - LVDS support omapdrm: - omap4 HDMI CEC support etnaviv: - GPU performance counters groundwork sun4i: - refactor driver load + TCON backend - HDMI improvements - A31 support - Misc fixes udl: - Probe/EDID read fixes. tilcdc: - Misc fixes. pl111: - Support more variants adv7511: - Improve EDID handling. - HDMI CEC support sii8620: - Add remote control support" * tag 'drm-for-v4.15' of git://people.freedesktop.org/~airlied/linux: (1480 commits) drm/rockchip: analogix_dp: Use mutex rather than spinlock drm/mode_object: fix documentation for object lookups. drm/i915: Reorder context-close to avoid calling i915_vma_close() under RCU drm/i915: Move init_clock_gating() back to where it was drm/i915: Prune the reservation shared fence array drm/i915: Idle the GPU before shinking everything drm/i915: Lock llist_del_first() vs llist_del_all() drm/i915: Calculate ironlake intermediate watermarks correctly, v2. drm/i915: Disable lazy PPGTT page table optimization for vGPU drm/i915/execlists: Remove the priority "optimisation" drm/i915: Filter out spurious execlists context-switch interrupts drm/amdgpu: use irq-safe lock for kiq->ring_lock drm/amdgpu: bypass lru touch for KIQ ring submission drm/amdgpu: Potential uninitialized variable in amdgpu_vm_update_directories() drm/amdgpu: potential uninitialized variable in amdgpu_vce_ring_parse_cs() drm/amd/powerplay: initialize a variable before using it drm/amd/powerplay: suppress KASAN out of bounds warning in vega10_populate_all_memory_levels drm/amd/amdgpu: fix evicted VRAM bo adjudgement condition drm/vblank: Tune drm_crtc_accurate_vblank_count() WARN down to a debug drm/rockchip: add CONFIG_OF dependency for lvds ...
Diffstat (limited to 'drivers/gpu/drm/drm_dp_mst_topology.c')
-rw-r--r--drivers/gpu/drm/drm_dp_mst_topology.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 41b492f99955..70dcfa58d3c2 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -294,6 +294,12 @@ static void drm_dp_encode_sideband_req(struct drm_dp_sideband_msg_req_body *req,
memcpy(&buf[idx], req->u.i2c_write.bytes, req->u.i2c_write.num_bytes);
idx += req->u.i2c_write.num_bytes;
break;
+
+ case DP_POWER_DOWN_PHY:
+ case DP_POWER_UP_PHY:
+ buf[idx] = (req->u.port_num.port_number & 0xf) << 4;
+ idx++;
+ break;
}
raw->cur_len = idx;
}
@@ -538,6 +544,21 @@ fail_len:
return false;
}
+static bool drm_dp_sideband_parse_power_updown_phy_ack(struct drm_dp_sideband_msg_rx *raw,
+ struct drm_dp_sideband_msg_reply_body *repmsg)
+{
+ int idx = 1;
+
+ repmsg->u.port_number.port_number = (raw->msg[idx] >> 4) & 0xf;
+ idx++;
+ if (idx > raw->curlen) {
+ DRM_DEBUG_KMS("power up/down phy parse length fail %d %d\n",
+ idx, raw->curlen);
+ return false;
+ }
+ return true;
+}
+
static bool drm_dp_sideband_parse_reply(struct drm_dp_sideband_msg_rx *raw,
struct drm_dp_sideband_msg_reply_body *msg)
{
@@ -567,6 +588,9 @@ static bool drm_dp_sideband_parse_reply(struct drm_dp_sideband_msg_rx *raw,
return drm_dp_sideband_parse_enum_path_resources_ack(raw, msg);
case DP_ALLOCATE_PAYLOAD:
return drm_dp_sideband_parse_allocate_payload_ack(raw, msg);
+ case DP_POWER_DOWN_PHY:
+ case DP_POWER_UP_PHY:
+ return drm_dp_sideband_parse_power_updown_phy_ack(raw, msg);
default:
DRM_ERROR("Got unknown reply 0x%02x\n", msg->req_type);
return false;
@@ -693,6 +717,22 @@ static int build_allocate_payload(struct drm_dp_sideband_msg_tx *msg, int port_n
return 0;
}
+static int build_power_updown_phy(struct drm_dp_sideband_msg_tx *msg,
+ int port_num, bool power_up)
+{
+ struct drm_dp_sideband_msg_req_body req;
+
+ if (power_up)
+ req.req_type = DP_POWER_UP_PHY;
+ else
+ req.req_type = DP_POWER_DOWN_PHY;
+
+ req.u.port_num.port_number = port_num;
+ drm_dp_encode_sideband_req(&req, msg);
+ msg->path_msg = true;
+ return 0;
+}
+
static int drm_dp_mst_assign_payload_id(struct drm_dp_mst_topology_mgr *mgr,
struct drm_dp_vcpi *vcpi)
{
@@ -1724,6 +1764,40 @@ fail_put:
return ret;
}
+int drm_dp_send_power_updown_phy(struct drm_dp_mst_topology_mgr *mgr,
+ struct drm_dp_mst_port *port, bool power_up)
+{
+ struct drm_dp_sideband_msg_tx *txmsg;
+ int len, ret;
+
+ port = drm_dp_get_validated_port_ref(mgr, port);
+ if (!port)
+ return -EINVAL;
+
+ txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL);
+ if (!txmsg) {
+ drm_dp_put_port(port);
+ return -ENOMEM;
+ }
+
+ txmsg->dst = port->parent;
+ len = build_power_updown_phy(txmsg, port->port_num, power_up);
+ drm_dp_queue_down_tx(mgr, txmsg);
+
+ ret = drm_dp_mst_wait_tx_reply(port->parent, txmsg);
+ if (ret > 0) {
+ if (txmsg->reply.reply_type == 1)
+ ret = -EINVAL;
+ else
+ ret = 0;
+ }
+ kfree(txmsg);
+ drm_dp_put_port(port);
+
+ return ret;
+}
+EXPORT_SYMBOL(drm_dp_send_power_updown_phy);
+
static int drm_dp_create_payload_step1(struct drm_dp_mst_topology_mgr *mgr,
int id,
struct drm_dp_payload *payload)