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libgralloc-qsd8k: Set the framebuffer offsets correctly

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The offsets for the framebuffer needs to start at a 4K aligned address.
Calculate the additional delta for the yoffset, the virtual address for flipping
as well as the total framebuffer size required to achieve this

Change-Id: Idfd70be10a24ac464ec820494b66d506a03a983b
CRs-fixed: 273888
This commit is contained in:
Naomi Luis
2011-02-08 11:29:43 -08:00
parent e9291d8e61
commit 32a41ee5dc
3 changed files with 28 additions and 10 deletions
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34
framebuffer.cpp
View File

@@ -694,26 +694,42 @@ int mapFrameBufferLocked(struct private_module_t* module)
info.transp.length = 0;
module->fbFormat = HAL_PIXEL_FORMAT_RGB_565;
}
// Calculate the FbSize to map.
int y = -1;
do {
y++;
} while (((finfo.line_length * (info.yres + y)) % 4096) != 0);
module->yres_delta = y;
/*
* Request NUM_BUFFERS screens (at lest 2 for page flipping)
*/
int numberOfBuffers = (int)(finfo.smem_len/(info.yres * info.xres * (info.bits_per_pixel/8)));
// Calculate the number of buffers required
int numberOfBuffers = 0;
int requiredSize = info.xres * (info.bits_per_pixel/8) *
(info.yres + module->yres_delta);
for (int num = NUM_FRAMEBUFFERS_MAX; num > 0; num--) {
int totalSizeRequired = num * requiredSize;
if (finfo.smem_len >= totalSizeRequired) {
numberOfBuffers = num;
break;
}
}
LOGV("num supported framebuffers in kernel = %d", numberOfBuffers);
if (property_get("debug.gr.numframebuffers", property, NULL) > 0) {
int num = atoi(property);
if ((num >= NUM_FRAMEBUFFERS_MIN) && (num <= NUM_FRAMEBUFFERS_MAX)) {
numberOfBuffers = num;
int reqNum = atoi(property);
if ((reqNum <= numberOfBuffers) && (reqNum >= NUM_FRAMEBUFFERS_MIN)
&& (reqNum <= NUM_FRAMEBUFFERS_MAX)) {
numberOfBuffers = reqNum;
}
}
if (numberOfBuffers > NUM_FRAMEBUFFERS_MAX)
numberOfBuffers = NUM_FRAMEBUFFERS_MAX;
info.yres_virtual = numberOfBuffers*(info.yres + module->yres_delta);
LOGD("We support %d buffers", numberOfBuffers);
info.yres_virtual = info.yres * numberOfBuffers;
uint32_t flags = PAGE_FLIP;
if (ioctl(fd, FBIOPUT_VSCREENINFO, &info) == -1) {
info.yres_virtual = info.yres;

3
gpu.cpp
View File

@@ -1,5 +1,6 @@
/*
* Copyright (C) 2010 The Android Open Source Project
* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -89,7 +90,7 @@ int gpu_context_t::gralloc_alloc_framebuffer_locked(size_t size, int usage,
m->bufferMask |= (1LU<<i);
break;
}
vaddr += bufferSize;
vaddr += (m->finfo.line_length * (m->info.yres + m->yres_delta));
}
hnd->base = vaddr;

1
gralloc_priv.h
View File

@@ -212,6 +212,7 @@ struct private_module_t {
struct avail_t avail[NUM_FRAMEBUFFERS_MAX];
pthread_mutex_t qlock;
pthread_cond_t qpost;
uint32_t yres_delta;
enum {
// flag to indicate we'll post this buffer