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
diff --git a/libhwcomposer/hwc_utils.cpp b/libhwcomposer/hwc_utils.cpp
index 8fdaf06..d8f8c70 100644
--- a/libhwcomposer/hwc_utils.cpp
+++ b/libhwcomposer/hwc_utils.cpp
@@ -628,6 +628,12 @@
if(transform & HWC_TRANSFORM_ROT_90) {
ovutils::setMdpFlags(mdpFlags,
ovutils::OV_MDP_SOURCE_ROTATED_90);
+ // enable bandwidth compression only if src width < 2048
+ if(qdutils::MDPVersion::getInstance().supportsBWC() &&
+ hnd->width < qdutils::MAX_DISPLAY_DIM) {
+ ovutils::setMdpFlags(mdpFlags,
+ ovutils::OV_MDSS_MDP_BWC_EN);
+ }
}
}
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
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;
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 {
diff --git a/libqdutils/mdp_version.cpp b/libqdutils/mdp_version.cpp
index 8da293d..e3e78ca 100644
--- a/libqdutils/mdp_version.cpp
+++ b/libqdutils/mdp_version.cpp
@@ -117,5 +117,9 @@
return mMDPDownscale;
}
+bool MDPVersion::supportsBWC() {
+ // BWC - Bandwidth Compression
+ return (mFeatures & MDP_BWC_EN);
+}
}; //namespace qdutils
diff --git a/libqdutils/mdp_version.h b/libqdutils/mdp_version.h
index 2fca640..0586001 100644
--- a/libqdutils/mdp_version.h
+++ b/libqdutils/mdp_version.h
@@ -82,6 +82,7 @@
uint8_t getDMAPipes() { return mDMAPipes; }
bool supportsDecimation();
uint32_t getMaxMDPDownscale();
+ bool supportsBWC();
private:
int mMDPVersion;
char mPanelType;