LineageOS/android_vendor_qcom_opensource_display-commonsys-intf
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hwc: Enable mdp downscale feature for 4k resolution

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Enable MDP Downscale feature for primary resolution greater than
2048 only for the targets that supports source split.

Change-Id: I21871b099f74543aa8c2416bac41e3a16d4ce72d
This commit is contained in:
Ramkumar Radhakrishnan
2014-08-28 19:04:18 -07:00
parent 87c95944b3
commit a5c72875f5
4 changed files with 43 additions and 7 deletions
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41
libexternal/external.cpp
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@@ -589,9 +589,11 @@ void ExternalDisplay::setAttributes() {
// if primary resolution is more than the hdmi resolution
// configure dpy attr to primary resolution and set
// downscale mode
// Restrict this upto 1080p resolution max
if(((priW * priH) > (width * height)) &&
((priW * priH) <= SUPPORTED_DOWNSCALE_AREA)) {
// Restrict this upto 1080p resolution max, if target does not
// support source split feature.
if((priW * priH) > (width * height) &&
(((priW * priH) <= SUPPORTED_DOWNSCALE_AREA) ||
qdutils::MDPVersion::getInstance().isSrcSplit())) {
// tmpW and tmpH will hold the primary dimensions before we
// update the aspect ratio if necessary.
int tmpW = priW;
@@ -609,14 +611,39 @@ void ExternalDisplay::setAttributes() {
// keeping aspect ratio intact.
hwc_rect r = {0, 0, 0, 0};
qdutils::getAspectRatioPosition(tmpW, tmpH, width, height, r);
mHwcContext->dpyAttr[HWC_DISPLAY_EXTERNAL].xres =
r.right - r.left;
mHwcContext->dpyAttr[HWC_DISPLAY_EXTERNAL].yres =
r.bottom - r.top;
int newExtW = r.right - r.left;
int newExtH = r.bottom - r.top;
int alignedExtW;
int alignedExtH;
// On 8994 and below targets MDP supports only 4X downscaling,
// Restricting selected external resolution to be exactly 4X
// greater resolution than actual external resolution
int maxMDPDownScale =
qdutils::MDPVersion::getInstance().getMaxMDPDownscale();
if((width * height * maxMDPDownScale) < (newExtW * newExtH)) {
float upScaleFactor = (float)maxMDPDownScale / 2.0f;
newExtW = (int)((float)width * upScaleFactor);
newExtH = (int)((float)height * upScaleFactor);
}
// Align it down so that the new aligned resolution does not
// exceed the maxMDPDownscale factor
alignedExtW = overlay::utils::aligndown(newExtW, 4);
alignedExtH = overlay::utils::aligndown(newExtH, 4);
mHwcContext->dpyAttr[HWC_DISPLAY_EXTERNAL].xres = alignedExtW;
mHwcContext->dpyAttr[HWC_DISPLAY_EXTERNAL].yres = alignedExtH;
// Set External Display MDP Downscale mode indicator
mHwcContext->dpyAttr[HWC_DISPLAY_EXTERNAL].mDownScaleMode =true;
}
}
ALOGD_IF(DEBUG_MDPDOWNSCALE, "Selected external resolution [%d X %d] "
"maxMDPDownScale %d MDPDownScaleMode %d srcSplitEnabled %d "
"MDPDownscale feature %d",
mHwcContext->dpyAttr[HWC_DISPLAY_EXTERNAL].xres,
mHwcContext->dpyAttr[HWC_DISPLAY_EXTERNAL].yres,
qdutils::MDPVersion::getInstance().getMaxMDPDownscale(),
mHwcContext->dpyAttr[HWC_DISPLAY_EXTERNAL].mDownScaleMode,
qdutils::MDPVersion::getInstance().isSrcSplit(),
mHwcContext->mMDPDownscaleEnabled);
//Initialize the display viewFrame info
mHwcContext->mViewFrame[HWC_DISPLAY_EXTERNAL].left = 0;
mHwcContext->mViewFrame[HWC_DISPLAY_EXTERNAL].top = 0;