commit bab187a53e4afad63df5d10111a787945a81d63a
author Sushil Chauhan <sushilchauhan@codeaurora.org> Wed Jan 30 17:44:15 2013 -0800
committer Sushil Chauhan <sushilchauhan@codeaurora.org> Mon Apr 29 13:51:44 2013 -0700
tree 59affa05f09ea8d2b255d23a7ed7246bb17eda63
parent d092e660ad08367ac2c9fd101f54356b2ee99a7e

liboverlay: Add support for MDSS Bandwidth Compression

- This adds support for Bandwidth Compression.
- If MDSS supports BWC, then we set BWC flags
  to both Rotator(encode) and overlay(decode)

Change-Id: I6f7800716a2ce2ab855f4c0b1a53cd96f7d06d74

liboverlay/overlayMdssRot.cpp

diff --git a/liboverlay/overlayMdssRot.cpp b/liboverlay/overlayMdssRot.cpp
index 1fabdca..6f2b564 100644
--- a/liboverlay/overlayMdssRot.cpp
+++ b/liboverlay/overlayMdssRot.cpp
@@ -20,6 +20,8 @@
 #include "overlayUtils.h"
 #include "overlayRotator.h"
 
+#define DEBUG_MDSS_ROT 0
+
 #ifdef VENUS_COLOR_FORMAT
 #include <media/msm_media_info.h>
 #else
@@ -252,7 +254,11 @@
     ovutils::Whf destWhf(mRotInfo.dst_rect.w, mRotInfo.dst_rect.h,
             mRotInfo.src.format); //mdss src and dst formats are same.
 
-    opBufSize = Rotator::calcOutputBufSize(destWhf);
+    if (mRotInfo.flags & ovutils::OV_MDSS_MDP_BWC_EN) {
+        opBufSize = calcCompressedBufSize();
+    } else {
+        opBufSize = Rotator::calcOutputBufSize(destWhf);
+    }
 
     if (mRotInfo.flags & utils::OV_MDP_SECURE_OVERLAY_SESSION)
         opBufSize = utils::align(opBufSize, SIZE_1M);
@@ -265,4 +271,23 @@
     ovutils::getDump(buf, len, "MdssRotData", mRotData);
 }
 
+// Calculate the compressed o/p buffer size for BWC
+uint32_t MdssRot::calcCompressedBufSize() {
+    uint32_t bufSize = 0;
+    int aWidth = ovutils::align(mRotInfo.src_rect.w, 64);
+    int aHeight = ovutils::align(mRotInfo.src_rect.h, 4);
+    int rau_cnt = aWidth/64;
+    int stride0 = (64 * 4 * rau_cnt) + rau_cnt/8;
+    int stride1 = (64 * 2 * rau_cnt) + rau_cnt/8;
+    int stride0_off = (aHeight/4);
+    int stride1_off = (aHeight/2);
+
+    //New o/p size for BWC
+    bufSize = (stride0 * stride0_off + stride1 * stride1_off) +
+                (rau_cnt * 2 * (stride0_off + stride1_off));
+    ALOGD_IF(DEBUG_MDSS_ROT, "%s: width = %d, height = %d raucount = %d"
+         "opBufSize = %d ", __FUNCTION__, aWidth, aHeight, rau_cnt, bufSize);
+    return bufSize;
+}
+
 } // namespace overlay

liboverlay/overlayRotator.h

diff --git a/liboverlay/overlayRotator.h b/liboverlay/overlayRotator.h
index c02dfba..120721c 100644
--- a/liboverlay/overlayRotator.h
+++ b/liboverlay/overlayRotator.h
@@ -198,6 +198,8 @@
     /* Calculates the rotator's o/p buffer size post the transform calcs and
      * knowing the o/p format depending on whether fastYuv is enabled or not */
     uint32_t calcOutputBufSize();
+    // Calculate the compressed o/p buffer size for BWC
+    uint32_t calcCompressedBufSize();
 
     /* MdssRot info structure */
     mdp_overlay   mRotInfo;

liboverlay/overlayUtils.h

diff --git a/liboverlay/overlayUtils.h b/liboverlay/overlayUtils.h
index ceb238d..0893328 100644
--- a/liboverlay/overlayUtils.h
+++ b/liboverlay/overlayUtils.h
@@ -262,6 +262,7 @@
     OV_MDP_FLIP_V = MDP_FLIP_UD,
     OV_MDSS_MDP_RIGHT_MIXER = MDSS_MDP_RIGHT_MIXER,
     OV_MDP_PP_EN = MDP_OVERLAY_PP_CFG_EN,
+    OV_MDSS_MDP_BWC_EN = MDP_BWC_EN,
 };
 
 enum eZorder {