/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/cdefs.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <linux/fb.h>
#include <linux/kd.h>
#ifdef MSM_BSP
#include <linux/msm_mdp.h>
#include <linux/msm_ion.h>
#endif
#include "minui.h"
#include "graphics.h"
#define MDP_V4_0 400
#define MAX_DISPLAY_DIM 2048
static GRSurface* overlay_init(minui_backend*);
static GRSurface* overlay_flip(minui_backend*);
static void overlay_blank(minui_backend*, bool);
static void overlay_exit(minui_backend*);
static GRSurface gr_framebuffer[2];
static bool double_buffered;
static GRSurface* gr_draw = NULL;
static int displayed_buffer;
static fb_var_screeninfo vi;
static int fb_fd = -1;
static bool isMDP5 = false;
static int leftSplit = 0;
static int rightSplit = 0;
#define ALIGN(x, align) (((x) + ((align)-1)) & ~((align)-1))
static size_t frame_size = 0;
#ifdef MSM_BSP
typedef struct {
unsigned char *mem_buf;
int size;
int ion_fd;
int mem_fd;
struct ion_handle_data handle_data;
} memInfo;
//Left and right overlay id
static int overlayL_id = MSMFB_NEW_REQUEST;
static int overlayR_id = MSMFB_NEW_REQUEST;
static memInfo mem_info;
#
static int map_mdp_pixel_format()
{
int format = MDP_RGB_565;
#if defined(RECOVERY_BGRA)
format = MDP_BGRA_8888;
#elif defined(RECOVERY_RGBA)
format = MDP_RGBA_8888;
#elif defined(RECOVERY_RGBX)
format = MDP_RGBA_8888;
#endif
return format;
}
#endif // MSM_BSP
static minui_backend my_backend = {
.init = overlay_init,
.flip = overlay_flip,
.blank = overlay_blank,
.exit = overlay_exit,
};
bool target_has_overlay(char *version)
{
int ret;
int mdp_version;
bool overlay_supported = false;
if (strlen(version) >= 8) {
if(!strncmp(version, "msmfb", strlen("msmfb"))) {
char str_ver[4];
memcpy(str_ver, version + strlen("msmfb"), 3);
str_ver[3] = '\0';
mdp_version = atoi(str_ver);
if (mdp_version >= MDP_V4_0) {
overlay_supported = true;
}
} else if (!strncmp(version, "mdssfb", strlen("mdssfb"))) {
overlay_supported = true;
isMDP5 = true;
}
}
return overlay_supported;
}
minui_backend* open_overlay() {
fb_fix_screeninfo fi;
int fd;
fd = open("/dev/graphics/fb0", O_RDWR);
if (fd < 0) {
perror("open_overlay cannot open fb0");
return NULL;
}
if (ioctl(fd, FBIOGET_FSCREENINFO, &fi) < 0) {
perror("failed to get fb0 info");
close(fd);
return NULL;
}
if (target_has_overlay(fi.id)) {
#ifdef MSM_BSP
close(fd);
return &my_backend;
#else
printf("Overlay graphics may work (%s), but not enabled. Use TW_TARGET_USES_QCOM_BSP := true to enable.\n", fi.id);
#endif
}
close(fd);
return NULL;
}
static void overlay_blank(minui_backend* backend __unused, bool blank)
{
#if defined(TW_NO_SCREEN_BLANK) && defined(TW_BRIGHTNESS_PATH) && defined(TW_MAX_BRIGHTNESS)
int fd;
char brightness[4];
snprintf(brightness, 4, "%03d", TW_MAX_BRIGHTNESS/2);
fd = open(TW_BRIGHTNESS_PATH, O_RDWR);
if (fd < 0) {
perror("cannot open LCD backlight");
return;
}
write(fd, blank ? "000" : brightness, 3);
close(fd);
#else
int ret;
ret = ioctl(fb_fd, FBIOBLANK, blank ? FB_BLANK_POWERDOWN : FB_BLANK_UNBLANK);
if (ret < 0)
perror("ioctl(): blank");
#endif
}
static void set_displayed_framebuffer(unsigned n)
{
if (n > 1 || !double_buffered) return;
vi.yres_virtual = gr_framebuffer[0].height * 2;
vi.yoffset = n * gr_framebuffer[0].height;
vi.bits_per_pixel = gr_framebuffer[0].pixel_bytes * 8;
if (ioctl(fb_fd, FBIOPUT_VSCREENINFO, &vi) < 0) {
perror("active fb swap failed");
}
displayed_buffer = n;
}
#ifdef MSM_BSP
void setDisplaySplit(void) {
char split[64] = {0};
if (!isMDP5)
return;
FILE* fp = fopen("/sys/class/graphics/fb0/msm_fb_split", "r");
if (fp) {
//Format "left right" space as delimiter
if(fread(split, sizeof(char), 64, fp)) {
leftSplit = atoi(split);
printf("Left Split=%d\n",leftSplit);
char *rght = strpbrk(split, " ");
if (rght)
rightSplit = atoi(rght + 1);
printf("Right Split=%d\n", rightSplit);
}
} else {
printf("Failed to open mdss_fb_split node\n");
}
if (fp)
fclose(fp);
}
int getLeftSplit(void) {
//Default even split for all displays with high res
int lSplit = vi.xres / 2;
//Override if split published by driver
if (leftSplit)
lSplit = leftSplit;
return lSplit;
}
int getRightSplit(void) {
return rightSplit;
}
int free_ion_mem(void) {
int ret = 0;
if (mem_info.mem_buf)
munmap(mem_info.mem_buf, mem_info.size);
if (mem_info.ion_fd >= 0) {
ret = ioctl(mem_info.ion_fd, ION_IOC_FREE, &mem_info.handle_data);
if (ret < 0)
perror("free_mem failed ");
}
if (mem_info.mem_fd >= 0)
close(mem_info.mem_fd);
if (mem_info.ion_fd >= 0)
close(mem_info.ion_fd);
memset(&mem_info, 0, sizeof(mem_info));
mem_info.mem_fd = -1;
mem_info.ion_fd = -1;
return 0;
}
int alloc_ion_mem(unsigned int size)
{
int result;
struct ion_fd_data fd_data;
struct ion_allocation_data ionAllocData;
mem_info.ion_fd = open("/dev/ion", O_RDWR|O_DSYNC);
if (mem_info.ion_fd < 0) {
perror("ERROR: Can't open ion ");
return -errno;
}
ionAllocData.flags = 0;
ionAllocData.len = size;
ionAllocData.align = sysconf(_SC_PAGESIZE);
#ifdef NEW_ION_HEAP
ionAllocData.heap_id_mask =
#else
ionAllocData.heap_mask =
#endif
ION_HEAP(ION_IOMMU_HEAP_ID) |
ION_HEAP(ION_SYSTEM_CONTIG_HEAP_ID);
result = ioctl(mem_info.ion_fd, ION_IOC_ALLOC, &ionAllocData);
if(result){
perror("ION_IOC_ALLOC Failed ");
close(mem_info.ion_fd);
return result;
}
fd_data.handle = ionAllocData.handle;
mem_info.handle_data.handle = ionAllocData.handle;
result = ioctl(mem_info.ion_fd, ION_IOC_MAP, &fd_data);
if (result) {
perror("ION_IOC_MAP Failed ");
free_ion_mem();
return result;
}
mem_info.mem_buf = (unsigned char *)mmap(NULL, size, PROT_READ |
PROT_WRITE, MAP_SHARED, fd_data.fd, 0);
mem_info.mem_fd = fd_data.fd;
if (!mem_info.mem_buf) {
perror("ERROR: mem_buf MAP_FAILED ");
free_ion_mem();
return -ENOMEM;
}
return 0;
}
bool isDisplaySplit(void) {
if (vi.xres > MAX_DISPLAY_DIM)
return true;
//check if right split is set by driver
if (getRightSplit())
return true;
return false;
}
int allocate_overlay(int fd, GRSurface gr_fb[])
{
int ret = 0;
if (!isDisplaySplit()) {
// Check if overlay is already allocated
if (MSMFB_NEW_REQUEST == overlayL_id) {
struct mdp_overlay overlayL;
memset(&overlayL, 0 , sizeof (struct mdp_overlay));
/* Fill Overlay Data */
overlayL.src.width = ALIGN(gr_fb[0].width, 32);
overlayL.src.height = gr_fb[0].height;
overlayL.src.format = map_mdp_pixel_format();
overlayL.src_rect.w = gr_fb[0].width;
overlayL.src_rect.h = gr_fb[0].height;
overlayL.dst_rect.w = gr_fb[0].width;
overlayL.dst_rect.h = gr_fb[0].height;
overlayL.alpha = 0xFF;
overlayL.transp_mask = MDP_TRANSP_NOP;
overlayL.id = MSMFB_NEW_REQUEST;
ret = ioctl(fd, MSMFB_OVERLAY_SET, &overlayL);
if (ret < 0) {
perror("Overlay Set Failed");
return ret;
}
overlayL_id = overlayL.id;
}
} else {
float xres = vi.xres;
int lSplit = getLeftSplit();
float lSplitRatio = lSplit / xres;
float lCropWidth = gr_fb[0].width * lSplitRatio;
int lWidth = lSplit;
int rWidth = gr_fb[0].width - lSplit;
int height = gr_fb[0].height;
if (MSMFB_NEW_REQUEST == overlayL_id) {
struct mdp_overlay overlayL;
memset(&overlayL, 0 , sizeof (struct mdp_overlay));
/* Fill OverlayL Data */
overlayL.src.width = ALIGN(gr_fb[0].width, 32);
overlayL.src.height = gr_fb[0].height;
overlayL.src.format = map_mdp_pixel_format();
overlayL.src_rect.x = 0;
overlayL.src_rect.y = 0;
overlayL.src_rect.w = lCropWidth;
overlayL.src_rect.h = gr_fb[0].height;
overlayL.dst_rect.x = 0;
overlayL.dst_rect.y = 0;
overlayL.dst_rect.w = lWidth;
overlayL.dst_rect.h = height;
overlayL.alpha = 0xFF;
overlayL.transp_mask = MDP_TRANSP_NOP;
overlayL.id = MSMFB_NEW_REQUEST;
ret = ioctl(fd, MSMFB_OVERLAY_SET, &overlayL);
if (ret < 0) {
perror("OverlayL Set Failed");
return ret;
}
overlayL_id = overlayL.id;
}
if (MSMFB_NEW_REQUEST == overlayR_id) {
struct mdp_overlay overlayR;
memset(&overlayR, 0 , sizeof (struct mdp_overlay));
/* Fill OverlayR Data */
overlayR.src.width = ALIGN(gr_fb[0].width, 32);
overlayR.src.height = gr_fb[0].height;
overlayR.src.format = map_mdp_pixel_format();
overlayR.src_rect.x = lCropWidth;
overlayR.src_rect.y = 0;
overlayR.src_rect.w = gr_fb[0].width - lCropWidth;
overlayR.src_rect.h = gr_fb[0].height;
overlayR.dst_rect.x = 0;
overlayR.dst_rect.y = 0;
overlayR.dst_rect.w = rWidth;
overlayR.dst_rect.h = height;
overlayR.alpha = 0xFF;
overlayR.flags = MDSS_MDP_RIGHT_MIXER;
overlayR.transp_mask = MDP_TRANSP_NOP;
overlayR.id = MSMFB_NEW_REQUEST;
ret = ioctl(fd, MSMFB_OVERLAY_SET, &overlayR);
if (ret < 0) {
perror("OverlayR Set Failed");
return ret;
}
overlayR_id = overlayR.id;
}
}
return 0;
}
int overlay_display_frame(int fd, void* data, size_t size)
{
int ret = 0;
struct msmfb_overlay_data ovdataL, ovdataR;
struct mdp_display_commit ext_commit;
if (!isDisplaySplit()) {
if (overlayL_id == MSMFB_NEW_REQUEST) {
perror("display_frame failed, no overlay\n");
return -EINVAL;
}
memcpy(mem_info.mem_buf, data, size);
memset(&ovdataL, 0, sizeof(struct msmfb_overlay_data));
ovdataL.id = overlayL_id;
ovdataL.data.flags = 0;
ovdataL.data.offset = 0;
ovdataL.data.memory_id = mem_info.mem_fd;
ret = ioctl(fd, MSMFB_OVERLAY_PLAY, &ovdataL);
if (ret < 0) {
perror("overlay_display_frame failed, overlay play Failed\n");
return ret;
}
} else {
if (overlayL_id == MSMFB_NEW_REQUEST) {
perror("display_frame failed, no overlayL \n");
return -EINVAL;
}
memcpy(mem_info.mem_buf, data, size);
memset(&ovdataL, 0, sizeof(struct msmfb_overlay_data));
ovdataL.id = overlayL_id;
ovdataL.data.flags = 0;
ovdataL.data.offset = 0;
ovdataL.data.memory_id = mem_info.mem_fd;
ret = ioctl(fd, MSMFB_OVERLAY_PLAY, &ovdataL);
if (ret < 0) {
perror("overlay_display_frame failed, overlayL play Failed\n");
return ret;
}
if (overlayR_id == MSMFB_NEW_REQUEST) {
perror("display_frame failed, no overlayR \n");
return -EINVAL;
}
memset(&ovdataR, 0, sizeof(struct msmfb_overlay_data));
ovdataR.id = overlayR_id;
ovdataR.data.flags = 0;
ovdataR.data.offset = 0;
ovdataR.data.memory_id = mem_info.mem_fd;
ret = ioctl(fd, MSMFB_OVERLAY_PLAY, &ovdataR);
if (ret < 0) {
perror("overlay_display_frame failed, overlayR play Failed\n");
return ret;
}
}
memset(&ext_commit, 0, sizeof(struct mdp_display_commit));
ext_commit.flags = MDP_DISPLAY_COMMIT_OVERLAY;
ext_commit.wait_for_finish = 1;
ret = ioctl(fd, MSMFB_DISPLAY_COMMIT, &ext_commit);
if (ret < 0) {
perror("overlay_display_frame failed, overlay commit Failed\n!");
}
return ret;
}
static GRSurface* overlay_flip(minui_backend* backend __unused) {
if (double_buffered) {
#if defined(RECOVERY_BGRA)
// In case of BGRA, do some byte swapping
unsigned int idx;
unsigned char tmp;
unsigned char* ucfb_vaddr = (unsigned char*)gr_draw->data;
for (idx = 0 ; idx < (gr_draw->height * gr_draw->row_bytes);
idx += 4) {
tmp = ucfb_vaddr[idx];
ucfb_vaddr[idx ] = ucfb_vaddr[idx + 2];
ucfb_vaddr[idx + 2] = tmp;
}
#endif
// Change gr_draw to point to the buffer currently displayed,
// then flip the driver so we're displaying the other buffer
// instead.
gr_draw = gr_framebuffer + displayed_buffer;
set_displayed_framebuffer(1-displayed_buffer);
overlay_display_frame(fb_fd, gr_draw->data, frame_size);
} else {
// Copy from the in-memory surface to the framebuffer.
overlay_display_frame(fb_fd, gr_draw->data, frame_size);
}
return gr_draw;
}
int free_overlay(int fd)
{
int ret = 0;
struct mdp_display_commit ext_commit;
if (!isDisplaySplit()) {
if (overlayL_id != MSMFB_NEW_REQUEST) {
ret = ioctl(fd, MSMFB_OVERLAY_UNSET, &overlayL_id);
if (ret) {
perror("Overlay Unset Failed");
overlayL_id = MSMFB_NEW_REQUEST;
return ret;
}
}
} else {
if (overlayL_id != MSMFB_NEW_REQUEST) {
ret = ioctl(fd, MSMFB_OVERLAY_UNSET, &overlayL_id);
if (ret) {
perror("OverlayL Unset Failed");
overlayL_id = MSMFB_NEW_REQUEST;
return ret;
}
}
if (overlayR_id != MSMFB_NEW_REQUEST) {
ret = ioctl(fd, MSMFB_OVERLAY_UNSET, &overlayR_id);
if (ret) {
perror("OverlayR Unset Failed");
overlayR_id = MSMFB_NEW_REQUEST;
return ret;
}
}
}
memset(&ext_commit, 0, sizeof(struct mdp_display_commit));
ext_commit.flags = MDP_DISPLAY_COMMIT_OVERLAY;
ext_commit.wait_for_finish = 1;
ret = ioctl(fd, MSMFB_DISPLAY_COMMIT, &ext_commit);
if (ret < 0) {
perror("ERROR: Clear MSMFB_DISPLAY_COMMIT failed!");
overlayL_id = MSMFB_NEW_REQUEST;
overlayR_id = MSMFB_NEW_REQUEST;
return ret;
}
overlayL_id = MSMFB_NEW_REQUEST;
overlayR_id = MSMFB_NEW_REQUEST;
return 0;
}
static GRSurface* overlay_init(minui_backend* backend) {
int fd = open("/dev/graphics/fb0", O_RDWR);
if (fd == -1) {
perror("cannot open fb0");
return NULL;
}
fb_fix_screeninfo fi;
if (ioctl(fd, FBIOGET_FSCREENINFO, &fi) < 0) {
perror("failed to get fb0 info");
close(fd);
return NULL;
}
if (ioctl(fd, FBIOGET_VSCREENINFO, &vi) < 0) {
perror("failed to get fb0 info");
close(fd);
return NULL;
}
// We print this out for informational purposes only, but
// throughout we assume that the framebuffer device uses an RGBX
// pixel format. This is the case for every development device I
// have access to. For some of those devices (eg, hammerhead aka
// Nexus 5), FBIOGET_VSCREENINFO *reports* that it wants a
// different format (XBGR) but actually produces the correct
// results on the display when you write RGBX.
//
// If you have a device that actually *needs* another pixel format
// (ie, BGRX, or 565), patches welcome...
printf("fb0 reports (possibly inaccurate):\n"
" vi.bits_per_pixel = %d\n"
" vi.red.offset = %3d .length = %3d\n"
" vi.green.offset = %3d .length = %3d\n"
" vi.blue.offset = %3d .length = %3d\n",
vi.bits_per_pixel,
vi.red.offset, vi.red.length,
vi.green.offset, vi.green.length,
vi.blue.offset, vi.blue.length);
void* bits = malloc(vi.xres_virtual * vi.yres * (vi.bits_per_pixel / 8));
if (bits == NULL) {
perror("failed to malloc framebuffer");
close(fd);
return NULL;
}
memset(bits, 0, fi.smem_len);
gr_framebuffer[0].width = vi.xres;
gr_framebuffer[0].height = vi.yres;
gr_framebuffer[0].row_bytes = fi.line_length;
gr_framebuffer[0].pixel_bytes = vi.bits_per_pixel / 8;
gr_framebuffer[0].data = reinterpret_cast<uint8_t*>(bits);
memset(gr_framebuffer[0].data, 0, gr_framebuffer[0].height * gr_framebuffer[0].row_bytes);
/* check if we can use double buffering */
if (vi.yres * fi.line_length * 2 <= fi.smem_len) {
double_buffered = true;
printf("double buffered.\n");
memcpy(gr_framebuffer+1, gr_framebuffer, sizeof(GRSurface));
gr_framebuffer[1].data = gr_framebuffer[0].data +
gr_framebuffer[0].height * gr_framebuffer[0].row_bytes;
gr_draw = gr_framebuffer+1;
} else {
double_buffered = false;
printf("single buffered.\n");
// Without double-buffering, we allocate RAM for a buffer to
// draw in, and then "flipping" the buffer consists of a
// memcpy from the buffer we allocated to the framebuffer.
gr_draw = (GRSurface*) malloc(sizeof(GRSurface));
if (gr_draw == NULL) {
printf("Failed to malloc gr_draw for single buffering.\n");
return NULL;
} else {
memcpy(gr_draw, gr_framebuffer, sizeof(GRSurface));
gr_draw->data = (unsigned char*) malloc(gr_draw->height * gr_draw->row_bytes);
if (!gr_draw->data) {
perror("failed to allocate in-memory surface");
return NULL;
}
}
}
memset(gr_draw->data, 0, gr_draw->height * gr_draw->row_bytes);
fb_fd = fd;
set_displayed_framebuffer(0);
frame_size = fi.line_length * vi.yres;
printf("framebuffer: %d (%d x %d)\n", fb_fd, gr_draw->width, gr_draw->height);
overlay_blank(backend, true);
overlay_blank(backend, false);
if (!alloc_ion_mem(fi.line_length * vi.yres))
allocate_overlay(fb_fd, gr_framebuffer);
return gr_draw;
}
static void overlay_exit(minui_backend* backend __unused) {
free_overlay(fb_fd);
free_ion_mem();
close(fb_fd);
fb_fd = -1;
if (!double_buffered && gr_draw) {
free(gr_draw->data);
free(gr_draw);
}
gr_draw = NULL;
if (gr_framebuffer[0].data) {
free(gr_framebuffer[0].data);
gr_framebuffer[0].data = NULL;
}
}
#else // MSM_BSP
static GRSurface* overlay_flip(minui_backend* backend __unused) {
return NULL;
}
static GRSurface* overlay_init(minui_backend* backend __unused) {
return NULL;
}
static void overlay_exit(minui_backend* backend __unused) {
return;
}
#endif // MSM_BSP
