hwc: Add dynamic fps support for PPP

Some apps like camera and video are running on
less fps than panel refresh rate. Hence setting
dynamic fps will help in reducing BW voting for PPP.

Change-Id: I236fe96d5c6547044083774388887638f9e32958

libcopybit/copybit.cpp

@@ -64,6 +64,7 @@ struct copybit_context_t {
     int     relFence;
     struct  mdp_buf_sync sync;
     struct  blitReq list;
+    uint8_t dynamic_fps;
 };
 
 /**
@@ -219,6 +220,7 @@ static void set_infos(struct copybit_context_t *dev,
                       struct mdp_blit_req *req, int flags)
 {
     req->alpha = dev->mAlpha;
+    req->fps = dev->dynamic_fps;
     req->transp_mask = MDP_TRANSP_NOP;
     req->flags = dev->mFlags | flags;
     // check if we are blitting to f/b
@@ -250,7 +252,7 @@ static int msm_copybit(struct copybit_context_t *dev, void const *list)
         for (unsigned int i=0 ; i<l->count ; i++) {
             ALOGE("%d: src={w=%d, h=%d, f=%d, rect={%d,%d,%d,%d}}\n"
                   "    dst={w=%d, h=%d, f=%d, rect={%d,%d,%d,%d}}\n"
-                  "    flags=%08x"
+                  "    flags=%08x, fps=%d"
                   ,
                   i,
                   l->req[i].src.width,
@@ -267,7 +269,8 @@ static int msm_copybit(struct copybit_context_t *dev, void const *list)
                   l->req[i].dst_rect.y,
                   l->req[i].dst_rect.w,
                   l->req[i].dst_rect.h,
-                  l->req[i].flags
+                  l->req[i].flags,
+                  l->req[i].fps
                  );
         }
 #endif
@@ -315,6 +318,9 @@ static int set_parameter_copybit(
                 if (value >= 256)   value = 255;
                 ctx->mAlpha = (uint8_t)value;
                 break;
+            case COPYBIT_DYNAMIC_FPS:
+                ctx->dynamic_fps = (uint8_t)value;
+                break;
             case COPYBIT_DITHER:
                 if (value == COPYBIT_ENABLE) {
                     ctx->mFlags |= MDP_DITHER;
@@ -747,6 +753,9 @@ static int open_copybit(const struct hw_module_t* module, const char* name,
     ctx->device.flush_get_fence = flush_get_fence;
     ctx->device.clear = clear_copybit;
     ctx->mAlpha = MDP_ALPHA_NOP;
+    //dynamic_fps is zero means default
+    //panel refresh rate for driver.
+    ctx->dynamic_fps = 0;
     ctx->mFlags = 0;
     ctx->sync.flags = 0;
     ctx->relFence = -1;

libcopybit/copybit.h

@@ -79,6 +79,7 @@ enum {
     /* FB height */
     COPYBIT_FRAMEBUFFER_HEIGHT = 8,
     COPYBIT_FG_LAYER = 9,
+    COPYBIT_DYNAMIC_FPS = 10,
 };
 
 /* values for copybit_set_parameter(COPYBIT_TRANSFORM) */

libhwcomposer/hwc_copybit.cpp

@@ -810,7 +810,13 @@ int  CopyBit::drawLayerUsingCopybit(hwc_context_t *dev, hwc_layer_1_t *layer,
         ALOGE("%s: Framebuffer handle is NULL", __FUNCTION__);
         return -1;
     }
-
+    uint32_t dynamic_fps = 0;
+#ifdef DYNAMIC_FPS
+    MetaData_t *mdata = hnd ? (MetaData_t *)hnd->base_metadata : NULL;
+    if (mdata && (mdata->operation & UPDATE_REFRESH_RATE)) {
+       dynamic_fps  = roundOff(mdata->refreshrate);
+    }
+#endif
     // Set the copybit source:
     copybit_image_t src;
     src.w = getWidth(hnd);
@@ -1025,6 +1031,7 @@ int  CopyBit::drawLayerUsingCopybit(hwc_context_t *dev, hwc_layer_1_t *layer,
                                               layerTransform);
     //TODO: once, we are able to read layer alpha, update this
     copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA, 255);
+    copybit->set_parameter(copybit, COPYBIT_DYNAMIC_FPS, dynamic_fps);
     copybit->set_parameter(copybit, COPYBIT_BLEND_MODE,
                                               layer->blending);
     copybit->set_parameter(copybit, COPYBIT_DITHER,