display: Add support for MDP Composition
This change
1) implements MDP Composition upto 3 layers
2) adds invalidator support to fall back to FB
composition during idle screen condition.
Change-Id: I55f27321fd0df096b353d66aaad1cc720cd4b84b
Acked-by: Jeykumar Sankaran <jsanka@codeaurora.org>
diff --git a/libhwcomposer/hwc_mdpcomp.h b/libhwcomposer/hwc_mdpcomp.h
new file mode 100755
index 0000000..199204c
--- /dev/null
+++ b/libhwcomposer/hwc_mdpcomp.h
@@ -0,0 +1,220 @@
+/*
+ * Copyright (C) 2012, Code Aurora Forum. All rights reserved.
+ * Not a Contribution, Apache license notifications and license are retained
+ * for attribution purposes only.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef HWC_MDP_COMP
+#define HWC_MDP_COMP
+
+#include <hwc_utils.h>
+#include <idle_invalidator.h>
+#include <cutils/properties.h>
+#include <overlay.h>
+
+#define MAX_STATIC_PIPES 3
+#define MDPCOMP_INDEX_OFFSET 4
+#define DEFAULT_IDLE_TIME 2000
+
+#define MAX_VG 2
+#define MAX_RGB 2
+#define VAR_INDEX 3
+#define MAX_PIPES (MAX_VG + MAX_RGB)
+#define HWC_MDPCOMP_INDEX_MASK 0x00000030
+
+
+//struct hwc_context_t;
+
+namespace qhwc {
+
+// pipe status
+enum {
+ PIPE_UNASSIGNED = 0,
+ PIPE_IN_FB_MODE,
+ PIPE_IN_COMP_MODE,
+};
+
+// pipe request
+enum {
+ PIPE_NONE = 0,
+ PIPE_REQ_VG,
+ PIPE_REQ_RGB,
+ PIPE_REQ_FB,
+};
+
+// MDP Comp Status
+enum {
+ MDPCOMP_SUCCESS = 0,
+ MDPCOMP_FAILURE,
+ MDPCOMP_ABORT,
+};
+
+//This class manages the status of 4 MDP pipes and keeps
+//track of Variable pipe mode.
+class PipeMgr {
+
+public:
+ PipeMgr() { reset();}
+ //reset pipemgr params
+ void reset();
+
+ //Based on the preference received, pipe mgr
+ //allocates the best available pipe to handle
+ //the case
+ int req_for_pipe(int pipe_req);
+
+ //Allocate requested pipe and update availablity
+ int assign_pipe(int pipe_pref);
+
+ // Get/Set pipe status
+ void setStatus(int pipe_index, int pipe_status) {
+ mStatus[pipe_index] = pipe_status;
+ }
+ int getStatus(int pipe_index) {
+ return mStatus[pipe_index];
+ }
+private:
+ int mVGPipes;
+ int mVGUsed;
+ int mVGIndex;
+ int mRGBPipes;
+ int mRGBUsed;
+ int mRGBIndex;
+ int mTotalAvail;
+ int mStatus[MAX_PIPES];
+};
+
+
+class MDPComp {
+ enum State {
+ MDPCOMP_ON = 0,
+ MDPCOMP_OFF,
+ MDPCOMP_OFF_PENDING,
+ };
+
+ enum {
+ MDPCOMP_LAYER_BLEND = 1,
+ MDPCOMP_LAYER_DOWNSCALE = 2,
+ MDPCOMP_LAYER_SKIP = 4,
+ MDPCOMP_LAYER_UNSUPPORTED_MEM = 8,
+ };
+
+ struct mdp_pipe_info {
+ int index;
+ int z_order;
+ bool isVG;
+ bool isFG;
+ bool vsync_wait;
+ };
+
+ struct pipe_layer_pair {
+ int layer_index;
+ mdp_pipe_info pipe_index;
+ native_handle_t* handle;
+ };
+
+ struct frame_info {
+ int count;
+ struct pipe_layer_pair* pipe_layer;
+
+ };
+
+ struct layer_mdp_info {
+ bool can_use_mdp;
+ int pipe_pref;
+ };
+
+ static State sMDPCompState;
+ static IdleInvalidator *idleInvalidator;
+ static struct frame_info sCurrentFrame;
+ static PipeMgr sPipeMgr;
+ static int sSkipCount;
+ static int sMaxLayers;
+ static bool sDebugLogs;
+ static bool sIdleFallBack;
+
+public:
+ /* Handler to invoke frame redraw on Idle Timer expiry */
+ static void timeout_handler(void *udata);
+
+ /* configure/tear-down MDPComp params*/
+ static bool init(hwc_context_t *ctx);
+ static bool deinit();
+
+ /*sets up mdp comp for the current frame */
+ static bool configure(hwc_composer_device_t *ctx, hwc_layer_list_t* list);
+
+ /* draw */
+ static int draw(hwc_context_t *ctx, hwc_layer_list_t *list);
+
+ /* store frame stats */
+ static void setStats(int skipCt) { sSkipCount = skipCt;};
+
+private:
+
+ /* get/set pipe index associated with overlay layers */
+ static void setLayerIndex(hwc_layer_t* layer, const int pipe_index);
+ static int getLayerIndex(hwc_layer_t* layer);
+
+ /* set/reset flags for MDPComp */
+ static void setMDPCompLayerFlags(hwc_layer_list_t* list);
+ static void unsetMDPCompLayerFlags(hwc_context_t* ctx,
+ hwc_layer_list_t* list);
+
+ static void print_info(hwc_layer_t* layer);
+
+ /* configure's overlay pipes for the frame */
+ static int prepare(hwc_context_t *ctx, hwc_layer_t *layer,
+ mdp_pipe_info& mdp_info);
+
+ /* checks for conditions where mdpcomp is not possible */
+ static bool is_doable(hwc_composer_device_t *dev,
+ const hwc_layer_list_t* list);
+
+ static bool setup(hwc_context_t* ctx, hwc_layer_list_t* list);
+
+ /* parses layer for properties affecting mdp comp */
+ static void get_layer_info(hwc_layer_t* layer, int& flags);
+
+ /* iterates through layer list to choose candidate to use overlay */
+ static int mark_layers(hwc_layer_list_t* list, layer_mdp_info* layer_info,
+ frame_info& current_frame);
+ static bool parse_and_allocate(hwc_context_t* ctx, hwc_layer_list_t* list,
+ frame_info& current_frame );
+
+ /* clears layer info struct */
+ static void reset_layer_mdp_info(layer_mdp_info* layer_mdp_info,int count);
+
+ /* allocates pipes to selected candidates */
+ static bool alloc_layer_pipes(hwc_layer_list_t* list,
+ layer_mdp_info* layer_info,
+ frame_info& current_frame);
+ /* updates variable pipe mode for the current frame */
+ static int configure_var_pipe(hwc_context_t* ctx);
+
+ /* get/set states */
+ static State get_state() { return sMDPCompState; };
+ static void set_state(State state) { sMDPCompState = state; };
+
+ /* reset state */
+ static void reset( hwc_context_t *ctx, hwc_layer_list_t* list );
+
+ /* Is feature enabled */
+ static bool isEnabled() { return sMaxLayers ? true : false; };
+ /* Is debug enabled */
+ static bool isDebug() { return sDebugLogs ? true : false; };
+};
+}; //namespace
+#endif