drm_hwcomposer: Process DPMS requests through compositor This patch changes the behavior of DPMS in hwcomposer from applying asynchronously/immediately, to queuing in the compositor and being processed in order. This is desirable for a couple of reasons: 1- It ensures all frames set before set_power_mode are shown on the screen before it turns off 2- We make sure we don't rmfb a framebuffer that is currently applied to a disabled crtc. The second reason above can cause the display to turn back off once it's on since the fb will dereference to zero in the kernel and it will disable the pipe without notifying us. Change-Id: I2aab9ee0353b12fecced46766ed2dbb64f0aef4b Signed-off-by: Sean Paul <seanpaul@chromium.org>
diff --git a/drmcomposition.cpp b/drmcomposition.cpp index 37e3bad..7a50601 100644 --- a/drmcomposition.cpp +++ b/drmcomposition.cpp
@@ -118,6 +118,10 @@ return composition_map_[display]->AddLayer(layer, bo, crtc, plane); } +int DrmComposition::AddDpmsMode(int display, uint32_t dpms_mode) { + return composition_map_[display]->AddDpmsMode(dpms_mode); +} + std::unique_ptr<DrmDisplayComposition> DrmComposition::TakeDisplayComposition( int display) { return std::move(composition_map_[display]); diff --git a/drmcomposition.h b/drmcomposition.h index a8f9836..e490811 100644 --- a/drmcomposition.h +++ b/drmcomposition.h
@@ -41,6 +41,7 @@ virtual unsigned GetRemainingLayers(int display, unsigned num_needed) const; virtual int AddLayer(int display, hwc_layer_1_t *layer, hwc_drm_bo_t *bo); + int AddDpmsMode(int display, uint32_t dpms_mode); std::unique_ptr<DrmDisplayComposition> TakeDisplayComposition(int display);
diff --git a/drmdisplaycomposition.cpp b/drmdisplaycomposition.cpp index f049f2d..2f8d651 100644 --- a/drmdisplaycomposition.cpp +++ b/drmdisplaycomposition.cpp
@@ -26,6 +26,7 @@ #include <cutils/log.h> #include <sw_sync.h> #include <sync/sync.h> +#include <xf86drmMode.h> namespace android { @@ -43,7 +44,8 @@ importer_(NULL), type_(DRM_COMPOSITION_TYPE_EMPTY), timeline_fd_(-1), - timeline_(0) { + timeline_(0), + dpms_mode_(DRM_MODE_DPMS_ON) { } DrmDisplayComposition::~DrmDisplayComposition() { @@ -109,6 +111,14 @@ return 0; } +int DrmDisplayComposition::AddDpmsMode(uint32_t dpms_mode) { + if (!validate_composition_type(DRM_COMPOSITION_TYPE_DPMS)) + return -EINVAL; + dpms_mode_ = dpms_mode; + type_ = DRM_COMPOSITION_TYPE_DPMS; + return 0; +} + int DrmDisplayComposition::FinishComposition() { int ret = sw_sync_timeline_inc(timeline_fd_, timeline_); if (ret) @@ -120,4 +130,8 @@ DrmCompositionLayerVector_t *DrmDisplayComposition::GetCompositionLayers() { return &layers_; } + +uint32_t DrmDisplayComposition::dpms_mode() const { + return dpms_mode_; +} } diff --git a/drmdisplaycomposition.h b/drmdisplaycomposition.h index bc8cf2e..2ae696f 100644 --- a/drmdisplaycomposition.h +++ b/drmdisplaycomposition.h
@@ -31,6 +31,7 @@ enum DrmCompositionType { DRM_COMPOSITION_TYPE_EMPTY, DRM_COMPOSITION_TYPE_FRAME, + DRM_COMPOSITION_TYPE_DPMS, }; typedef struct DrmCompositionLayer { @@ -55,10 +56,12 @@ int AddLayer(hwc_layer_1_t *layer, hwc_drm_bo_t *bo, DrmCrtc *crtc, DrmPlane *plane); + int AddDpmsMode(uint32_t dpms_mode); int FinishComposition(); DrmCompositionLayerVector_t *GetCompositionLayers(); + uint32_t dpms_mode() const; private: DrmDisplayComposition(const DrmDisplayComposition &) = delete; @@ -74,6 +77,7 @@ int timeline_; DrmCompositionLayerVector_t layers_; + uint32_t dpms_mode_; }; } diff --git a/drmdisplaycompositor.cpp b/drmdisplaycompositor.cpp index 2a11ee7..80b71f5 100644 --- a/drmdisplaycompositor.cpp +++ b/drmdisplaycompositor.cpp
@@ -40,6 +40,7 @@ worker_(this), frame_no_(0), initialized_(false), + active_(false), dump_frames_composited_(0), dump_last_timestamp_ns_(0) { struct timespec ts; @@ -95,6 +96,15 @@ std::unique_ptr<DrmDisplayComposition> composition) { switch (composition->type()) { case DRM_COMPOSITION_TYPE_FRAME: + if (!active_) + return -ENODEV; + break; + case DRM_COMPOSITION_TYPE_DPMS: + /* + * Update the state as soon as we get it so we can start/stop queuing + * frames asap. + */ + active_ = (composition->dpms_mode() == DRM_MODE_DPMS_ON); break; case DRM_COMPOSITION_TYPE_EMPTY: return 0; @@ -189,6 +199,23 @@ return ret; } +int DrmDisplayCompositor::ApplyDpms(DrmDisplayComposition *display_comp) { + DrmConnector *conn = drm_->GetConnectorForDisplay(display_); + if (!conn) { + ALOGE("Failed to get DrmConnector for display %d", display_); + return -ENODEV; + } + + const DrmProperty &prop = conn->dpms_property(); + int ret = drmModeConnectorSetProperty(drm_->fd(), conn->id(), prop.id(), + display_comp->dpms_mode()); + if (ret) { + ALOGE("Failed to set DPMS property for connector %d", conn->id()); + return ret; + } + return 0; +} + int DrmDisplayCompositor::Composite() { ATRACE_CALL(); int ret = pthread_mutex_lock(&lock_); @@ -222,6 +249,11 @@ } ++dump_frames_composited_; break; + case DRM_COMPOSITION_TYPE_DPMS: + ret = ApplyDpms(composition.get()); + if (ret) + ALOGE("Failed to apply dpms for display %d", display_); + return ret; default: ALOGE("Unknown composition type %d", composition->type()); return -EINVAL; diff --git a/drmdisplaycompositor.h b/drmdisplaycompositor.h index 928ce46..9f50664 100644 --- a/drmdisplaycompositor.h +++ b/drmdisplaycompositor.h
@@ -47,6 +47,7 @@ DrmDisplayCompositor(const DrmDisplayCompositor &) = delete; int ApplyFrame(DrmDisplayComposition *display_comp); + int ApplyDpms(DrmDisplayComposition *display_comp); DrmResources *drm_; int display_; @@ -59,6 +60,7 @@ uint64_t frame_no_; bool initialized_; + bool active_; // mutable since we need to acquire in HaveQueuedComposites mutable pthread_mutex_t lock_;
diff --git a/drmresources.cpp b/drmresources.cpp index 2cda217..9be990f 100644 --- a/drmresources.cpp +++ b/drmresources.cpp
@@ -467,19 +467,22 @@ return -EINVAL; } - DrmConnector *c = GetConnectorForDisplay(display); - if (!c) { - ALOGE("Failed to get DrmConnector for display %d", display); - return -ENODEV; + DrmComposition *comp = (DrmComposition *)compositor_.CreateComposition(NULL); + if (!comp) { + ALOGE("Failed to create composition for dpms on %d", display); + return -ENOMEM; } - - const DrmProperty &prop = c->dpms_property(); - int ret = drmModeConnectorSetProperty(fd_, c->id(), prop.id(), mode); + int ret = comp->AddDpmsMode(display, mode); if (ret) { - ALOGE("Failed to set DPMS property for connector %d", c->id()); + ALOGE("Failed to add dpms %ld to composition on %d %d", mode, display, ret); + delete comp; return ret; } - + ret = compositor_.QueueComposition((Composition *)comp); + if (ret) { + ALOGE("Failed to queue dpms composition on %d %d", display, ret); + return ret; + } return 0; } 