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weston/src/compositor-fbdev.c

1178 lines
32 KiB

/*
* Copyright © 2008-2011 Kristian Høgsberg
* Copyright © 2011 Intel Corporation
* Copyright © 2012 Raspberry Pi Foundation
* Copyright © 2013 Philip Withnall
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The copyright holders make
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define _GNU_SOURCE
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/fb.h>
#include <libudev.h>
#include "config.h"
#include "compositor.h"
#include "launcher-util.h"
#include "pixman-renderer.h"
#include "evdev.h"
struct fbdev_compositor {
struct weston_compositor base;
uint32_t prev_state;
struct udev *udev;
struct tty *tty;
};
struct fbdev_screeninfo {
unsigned int x_resolution; /* pixels, visible area */
unsigned int y_resolution; /* pixels, visible area */
unsigned int width_mm; /* visible screen width in mm */
unsigned int height_mm; /* visible screen height in mm */
unsigned int bits_per_pixel;
size_t buffer_length; /* length of frame buffer memory in bytes */
size_t line_length; /* length of a line in bytes */
char id[16]; /* screen identifier */
pixman_format_code_t pixel_format; /* frame buffer pixel format */
unsigned int refresh_rate; /* Hertz */
};
struct fbdev_output {
struct fbdev_compositor *compositor;
struct weston_output base;
struct weston_mode mode;
struct wl_event_source *finish_frame_timer;
/* Frame buffer details. */
const char *device; /* ownership shared with fbdev_parameters */
struct fbdev_screeninfo fb_info;
void *fb; /* length is fb_info.buffer_length */
/* pixman details. */
pixman_image_t *hw_surface;
pixman_image_t *shadow_surface;
void *shadow_buf;
uint8_t depth;
};
struct fbdev_seat {
struct weston_seat base;
struct wl_list devices_list;
struct udev_monitor *udev_monitor;
struct wl_event_source *udev_monitor_source;
char *seat_id;
};
struct fbdev_parameters {
int tty;
char *device;
};
static inline struct fbdev_output *
to_fbdev_output(struct weston_output *base)
{
return container_of(base, struct fbdev_output, base);
}
static inline struct fbdev_seat *
to_fbdev_seat(struct weston_seat *base)
{
return container_of(base, struct fbdev_seat, base);
}
static inline struct fbdev_compositor *
to_fbdev_compositor(struct weston_compositor *base)
{
return container_of(base, struct fbdev_compositor, base);
}
static void
fbdev_output_repaint(struct weston_output *base, pixman_region32_t *damage)
{
struct fbdev_output *output = to_fbdev_output(base);
struct weston_compositor *ec = output->base.compositor;
pixman_box32_t *rects;
int nrects, i, src_x, src_y, x1, y1, x2, y2, width, height;
/* Repaint the damaged region onto the back buffer. */
pixman_renderer_output_set_buffer(base, output->shadow_surface);
ec->renderer->repaint_output(base, damage);
/* Transform and composite onto the frame buffer. */
width = pixman_image_get_width(output->shadow_surface);
height = pixman_image_get_height(output->shadow_surface);
rects = pixman_region32_rectangles(damage, &nrects);
for (i = 0; i < nrects; i++) {
switch (base->transform) {
default:
case WL_OUTPUT_TRANSFORM_NORMAL:
x1 = rects[i].x1;
x2 = rects[i].x2;
y1 = rects[i].y1;
y2 = rects[i].y2;
break;
case WL_OUTPUT_TRANSFORM_180:
x1 = width - rects[i].x2;
x2 = width - rects[i].x1;
y1 = height - rects[i].y2;
y2 = height - rects[i].y1;
break;
case WL_OUTPUT_TRANSFORM_90:
x1 = height - rects[i].y2;
x2 = height - rects[i].y1;
y1 = rects[i].x1;
y2 = rects[i].x2;
break;
case WL_OUTPUT_TRANSFORM_270:
x1 = rects[i].y1;
x2 = rects[i].y2;
y1 = width - rects[i].x2;
y2 = width - rects[i].x1;
break;
}
src_x = x1;
src_y = y1;
pixman_image_composite32(PIXMAN_OP_SRC,
output->shadow_surface, /* src */
NULL /* mask */,
output->hw_surface, /* dest */
src_x, src_y, /* src_x, src_y */
0, 0, /* mask_x, mask_y */
x1, y1, /* dest_x, dest_y */
x2 - x1, /* width */
y2 - y1 /* height */);
}
/* Update the damage region. */
pixman_region32_subtract(&ec->primary_plane.damage,
&ec->primary_plane.damage, damage);
/* Schedule the end of the frame. We do not sync this to the frame
* buffer clock because users who want that should be using the DRM
* compositor. FBIO_WAITFORVSYNC blocks and FB_ACTIVATE_VBL requires
* panning, which is broken in most kernel drivers.
*
* Finish the frame synchronised to the specified refresh rate. The
* refresh rate is given in mHz and the interval in ms. */
wl_event_source_timer_update(output->finish_frame_timer,
1000000 / output->mode.refresh);
}
static int
finish_frame_handler(void *data)
{
struct fbdev_output *output = data;
uint32_t msec;
struct timeval tv;
gettimeofday(&tv, NULL);
msec = tv.tv_sec * 1000 + tv.tv_usec / 1000;
weston_output_finish_frame(&output->base, msec);
return 1;
}
static pixman_format_code_t
calculate_pixman_format(struct fb_var_screeninfo *vinfo,
struct fb_fix_screeninfo *finfo)
{
/* Calculate the pixman format supported by the frame buffer from the
* buffer's metadata. Return 0 if no known pixman format is supported
* (since this has depth 0 it's guaranteed to not conflict with any
* actual pixman format).
*
* Documentation on the vinfo and finfo structures:
* http://www.mjmwired.net/kernel/Documentation/fb/api.txt
*
* TODO: Try a bit harder to support other formats, including setting
* the preferred format in the hardware. */
int type;
weston_log("Calculating pixman format from:\n"
STAMP_SPACE " - type: %i (aux: %i)\n"
STAMP_SPACE " - visual: %i\n"
STAMP_SPACE " - bpp: %i (grayscale: %i)\n"
STAMP_SPACE " - red: offset: %i, length: %i, MSB: %i\n"
STAMP_SPACE " - green: offset: %i, length: %i, MSB: %i\n"
STAMP_SPACE " - blue: offset: %i, length: %i, MSB: %i\n"
STAMP_SPACE " - transp: offset: %i, length: %i, MSB: %i\n",
finfo->type, finfo->type_aux, finfo->visual,
vinfo->bits_per_pixel, vinfo->grayscale,
vinfo->red.offset, vinfo->red.length, vinfo->red.msb_right,
vinfo->green.offset, vinfo->green.length,
vinfo->green.msb_right,
vinfo->blue.offset, vinfo->blue.length,
vinfo->blue.msb_right,
vinfo->transp.offset, vinfo->transp.length,
vinfo->transp.msb_right);
/* We only handle packed formats at the moment. */
if (finfo->type != FB_TYPE_PACKED_PIXELS)
return 0;
/* We only handle true-colour frame buffers at the moment. */
if (finfo->visual != FB_VISUAL_TRUECOLOR || vinfo->grayscale != 0)
return 0;
/* We only support formats with MSBs on the left. */
if (vinfo->red.msb_right != 0 || vinfo->green.msb_right != 0 ||
vinfo->blue.msb_right != 0)
return 0;
/* Work out the format type from the offsets. We only support RGBA and
* ARGB at the moment. */
type = PIXMAN_TYPE_OTHER;
if ((vinfo->transp.offset >= vinfo->red.offset ||
vinfo->transp.length == 0) &&
vinfo->red.offset >= vinfo->green.offset &&
vinfo->green.offset >= vinfo->blue.offset)
type = PIXMAN_TYPE_ARGB;
else if (vinfo->red.offset >= vinfo->green.offset &&
vinfo->green.offset >= vinfo->blue.offset &&
vinfo->blue.offset >= vinfo->transp.offset)
type = PIXMAN_TYPE_RGBA;
if (type == PIXMAN_TYPE_OTHER)
return 0;
/* Build the format. */
return PIXMAN_FORMAT(vinfo->bits_per_pixel, type,
vinfo->transp.length,
vinfo->red.length,
vinfo->green.length,
vinfo->blue.length);
}
static int
calculate_refresh_rate(struct fb_var_screeninfo *vinfo)
{
uint64_t quot;
/* Calculate monitor refresh rate. Default is 60 Hz. Units are mHz. */
quot = (vinfo->upper_margin + vinfo->lower_margin + vinfo->yres);
quot *= (vinfo->left_margin + vinfo->right_margin + vinfo->xres);
quot *= vinfo->pixclock;
if (quot > 0) {
uint64_t refresh_rate;
refresh_rate = 1000000000000000LLU / quot;
if (refresh_rate > 200000)
refresh_rate = 200000; /* cap at 200 Hz */
return refresh_rate;
}
return 60 * 1000; /* default to 60 Hz */
}
static int
fbdev_query_screen_info(struct fbdev_output *output, int fd,
struct fbdev_screeninfo *info)
{
struct fb_var_screeninfo varinfo;
struct fb_fix_screeninfo fixinfo;
/* Probe the device for screen information. */
if (ioctl(fd, FBIOGET_FSCREENINFO, &fixinfo) < 0 ||
ioctl(fd, FBIOGET_VSCREENINFO, &varinfo) < 0) {
return -1;
}
/* Store the pertinent data. */
info->x_resolution = varinfo.xres;
info->y_resolution = varinfo.yres;
info->width_mm = varinfo.width;
info->height_mm = varinfo.height;
info->bits_per_pixel = varinfo.bits_per_pixel;
info->buffer_length = fixinfo.smem_len;
info->line_length = fixinfo.line_length;
strncpy(info->id, fixinfo.id, sizeof(info->id) / sizeof(*info->id));
info->pixel_format = calculate_pixman_format(&varinfo, &fixinfo);
info->refresh_rate = calculate_refresh_rate(&varinfo);
if (info->pixel_format == 0) {
weston_log("Frame buffer uses an unsupported format.\n");
return -1;
}
return 1;
}
static int
fbdev_set_screen_info(struct fbdev_output *output, int fd,
struct fbdev_screeninfo *info)
{
struct fb_var_screeninfo varinfo;
/* Grab the current screen information. */
if (ioctl(fd, FBIOGET_VSCREENINFO, &varinfo) < 0) {
return -1;
}
/* Update the information. */
varinfo.xres = info->x_resolution;
varinfo.yres = info->y_resolution;
varinfo.width = info->width_mm;
varinfo.height = info->height_mm;
varinfo.bits_per_pixel = info->bits_per_pixel;
/* Try to set up an ARGB (x8r8g8b8) pixel format. */
varinfo.grayscale = 0;
varinfo.transp.offset = 24;
varinfo.transp.length = 0;
varinfo.transp.msb_right = 0;
varinfo.red.offset = 16;
varinfo.red.length = 8;
varinfo.red.msb_right = 0;
varinfo.green.offset = 8;
varinfo.green.length = 8;
varinfo.green.msb_right = 0;
varinfo.blue.offset = 0;
varinfo.blue.length = 8;
varinfo.blue.msb_right = 0;
/* Set the device's screen information. */
if (ioctl(fd, FBIOPUT_VSCREENINFO, &varinfo) < 0) {
return -1;
}
return 1;
}
static void fbdev_frame_buffer_destroy(struct fbdev_output *output);
/* Returns an FD for the frame buffer device. */
static int
fbdev_frame_buffer_open(struct fbdev_output *output, const char *fb_dev,
struct fbdev_screeninfo *screen_info)
{
int fd = -1;
weston_log("Opening fbdev frame buffer.\n");
/* Open the frame buffer device. */
fd = open(fb_dev, O_RDWR | O_CLOEXEC);
if (fd < 0) {
weston_log("Failed to open frame buffer device ‘%s’: %s\n",
fb_dev, strerror(errno));
return -1;
}
/* Grab the screen info. */
if (fbdev_query_screen_info(output, fd, screen_info) < 0) {
weston_log("Failed to get frame buffer info: %s\n",
strerror(errno));
close(fd);
return -1;
}
return fd;
}
/* Closes the FD on success or failure. */
static int
fbdev_frame_buffer_map(struct fbdev_output *output, int fd)
{
int retval = -1;
weston_log("Mapping fbdev frame buffer.\n");
/* Map the frame buffer. Write-only mode, since we don't want to read
* anything back (because it's slow). */
output->fb = mmap(NULL, output->fb_info.buffer_length,
PROT_WRITE, MAP_SHARED, fd, 0);
if (output->fb == MAP_FAILED) {
weston_log("Failed to mmap frame buffer: %s\n",
strerror(errno));
goto out_close;
}
/* Create a pixman image to wrap the memory mapped frame buffer. */
output->hw_surface =
pixman_image_create_bits(output->fb_info.pixel_format,
output->fb_info.x_resolution,
output->fb_info.y_resolution,
output->fb,
output->fb_info.line_length);
if (output->hw_surface == NULL) {
weston_log("Failed to create surface for frame buffer.\n");
goto out_unmap;
}
/* Success! */
retval = 0;
out_unmap:
if (retval != 0 && output->fb != NULL)
fbdev_frame_buffer_destroy(output);
out_close:
if (fd >= 0)
close(fd);
return retval;
}
static void
fbdev_frame_buffer_destroy(struct fbdev_output *output)
{
weston_log("Destroying fbdev frame buffer.\n");
if (munmap(output->fb, output->fb_info.buffer_length) < 0)
weston_log("Failed to munmap frame buffer: %s\n",
strerror(errno));
output->fb = NULL;
}
static void fbdev_output_destroy(struct weston_output *base);
static void fbdev_output_disable(struct weston_output *base);
static int
fbdev_output_create(struct fbdev_compositor *compositor,
const char *device)
{
struct fbdev_output *output;
pixman_transform_t transform;
int fb_fd;
int shadow_width, shadow_height;
int width, height;
unsigned int bytes_per_pixel;
struct wl_event_loop *loop;
weston_log("Creating fbdev output.\n");
output = calloc(1, sizeof *output);
if (!output)
return -1;
output->compositor = compositor;
output->device = device;
/* Create the frame buffer. */
fb_fd = fbdev_frame_buffer_open(output, device, &output->fb_info);
if (fb_fd < 0) {
weston_log("Creating frame buffer failed.\n");
goto out_free;
}
if (fbdev_frame_buffer_map(output, fb_fd) < 0) {
weston_log("Mapping frame buffer failed.\n");
goto out_free;
}
output->base.repaint = fbdev_output_repaint;
output->base.destroy = fbdev_output_destroy;
output->base.assign_planes = NULL;
output->base.set_backlight = NULL;
output->base.set_dpms = NULL;
output->base.switch_mode = NULL;
/* only one static mode in list */
output->mode.flags =
WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
output->mode.width = output->fb_info.x_resolution;
output->mode.height = output->fb_info.y_resolution;
output->mode.refresh = output->fb_info.refresh_rate;
wl_list_init(&output->base.mode_list);
wl_list_insert(&output->base.mode_list, &output->mode.link);
output->base.current = &output->mode;
output->base.origin = &output->mode;
output->base.subpixel = WL_OUTPUT_SUBPIXEL_UNKNOWN;
output->base.make = "unknown";
output->base.model = output->fb_info.id;
weston_output_init(&output->base, &compositor->base,
0, 0, output->fb_info.width_mm,
output->fb_info.height_mm,
WL_OUTPUT_TRANSFORM_NORMAL);
width = output->fb_info.x_resolution;
height = output->fb_info.y_resolution;
pixman_transform_init_identity(&transform);
switch (output->base.transform) {
default:
case WL_OUTPUT_TRANSFORM_NORMAL:
shadow_width = width;
shadow_height = height;
pixman_transform_rotate(&transform,
NULL, 0, 0);
pixman_transform_translate(&transform, NULL,
0, 0);
break;
case WL_OUTPUT_TRANSFORM_180:
shadow_width = width;
shadow_height = height;
pixman_transform_rotate(&transform,
NULL, -pixman_fixed_1, 0);
pixman_transform_translate(NULL, &transform,
pixman_int_to_fixed(shadow_width),
pixman_int_to_fixed(shadow_height));
break;
case WL_OUTPUT_TRANSFORM_270:
shadow_width = height;
shadow_height = width;
pixman_transform_rotate(&transform,
NULL, 0, pixman_fixed_1);
pixman_transform_translate(&transform,
NULL,
pixman_int_to_fixed(shadow_width),
0);
break;
case WL_OUTPUT_TRANSFORM_90:
shadow_width = height;
shadow_height = width;
pixman_transform_rotate(&transform,
NULL, 0, -pixman_fixed_1);
pixman_transform_translate(&transform,
NULL,
0,
pixman_int_to_fixed(shadow_height));
break;
}
bytes_per_pixel = output->fb_info.bits_per_pixel / 8;
output->shadow_buf = malloc(width * height * bytes_per_pixel);
output->shadow_surface =
pixman_image_create_bits(output->fb_info.pixel_format,
shadow_width, shadow_height,
output->shadow_buf,
shadow_width * bytes_per_pixel);
if (output->shadow_buf == NULL || output->shadow_surface == NULL) {
weston_log("Failed to create surface for frame buffer.\n");
goto out_hw_surface;
}
/* No need in transform for normal output */
if (output->base.transform != WL_OUTPUT_TRANSFORM_NORMAL)
pixman_image_set_transform(output->shadow_surface, &transform);
if (pixman_renderer_output_create(&output->base) < 0)
goto out_shadow_surface;
loop = wl_display_get_event_loop(compositor->base.wl_display);
output->finish_frame_timer =
wl_event_loop_add_timer(loop, finish_frame_handler, output);
wl_list_insert(compositor->base.output_list.prev, &output->base.link);
weston_log("fbdev output %d×%d px\n",
output->mode.width, output->mode.height);
weston_log_continue(STAMP_SPACE "guessing %d Hz and 96 dpi\n",
output->mode.refresh / 1000);
return 0;
out_shadow_surface:
pixman_image_unref(output->shadow_surface);
output->shadow_surface = NULL;
out_hw_surface:
free(output->shadow_buf);
pixman_image_unref(output->hw_surface);
output->hw_surface = NULL;
weston_output_destroy(&output->base);
fbdev_frame_buffer_destroy(output);
out_free:
free(output);
return -1;
}
static void
fbdev_output_destroy(struct weston_output *base)
{
struct fbdev_output *output = to_fbdev_output(base);
weston_log("Destroying fbdev output.\n");
/* Close the frame buffer. */
fbdev_output_disable(base);
if (base->renderer_state != NULL)
pixman_renderer_output_destroy(base);
if (output->shadow_surface != NULL) {
pixman_image_unref(output->shadow_surface);
output->shadow_surface = NULL;
}
if (output->shadow_buf != NULL) {
free(output->shadow_buf);
output->shadow_buf = NULL;
}
/* Remove the output. */
wl_list_remove(&output->base.link);
weston_output_destroy(&output->base);
free(output);
}
/* strcmp()-style return values. */
static int
compare_screen_info (const struct fbdev_screeninfo *a,
const struct fbdev_screeninfo *b)
{
if (a->x_resolution == b->x_resolution &&
a->y_resolution == b->y_resolution &&
a->width_mm == b->width_mm &&
a->height_mm == b->height_mm &&
a->bits_per_pixel == b->bits_per_pixel &&
a->pixel_format == b->pixel_format &&
a->refresh_rate == b->refresh_rate)
return 0;
return 1;
}
static int
fbdev_output_reenable(struct fbdev_compositor *compositor,
struct weston_output *base)
{
struct fbdev_output *output = to_fbdev_output(base);
struct fbdev_screeninfo new_screen_info;
int fb_fd;
weston_log("Re-enabling fbdev output.\n");
/* Create the frame buffer. */
fb_fd = fbdev_frame_buffer_open(output, output->device,
&new_screen_info);
if (fb_fd < 0) {
weston_log("Creating frame buffer failed.\n");
goto err;
}
/* Check whether the frame buffer details have changed since we were
* disabled. */
if (compare_screen_info (&output->fb_info, &new_screen_info) != 0) {
/* Perform a mode-set to restore the old mode. */
if (fbdev_set_screen_info(output, fb_fd,
&output->fb_info) < 0) {
weston_log("Failed to restore mode settings. "
"Attempting to re-open output anyway.\n");
}
/* Remove and re-add the output so that resources depending on
* the frame buffer X/Y resolution (such as the shadow buffer)
* are re-initialised. */
fbdev_output_destroy(base);
fbdev_output_create(compositor, output->device);
return 0;
}
/* Map the device if it has the same details as before. */
if (fbdev_frame_buffer_map(output, fb_fd) < 0) {
weston_log("Mapping frame buffer failed.\n");
goto err;
}
return 0;
err:
return -1;
}
/* NOTE: This leaves output->fb_info populated, caching data so that if
* fbdev_output_reenable() is called again, it can determine whether a mode-set
* is needed. */
static void
fbdev_output_disable(struct weston_output *base)
{
struct fbdev_output *output = to_fbdev_output(base);
weston_log("Disabling fbdev output.\n");
if (output->hw_surface != NULL) {
pixman_image_unref(output->hw_surface);
output->hw_surface = NULL;
}
fbdev_frame_buffer_destroy(output);
}
static void
fbdev_led_update(struct weston_seat *seat_base, enum weston_led leds)
{
struct fbdev_seat *seat = to_fbdev_seat(seat_base);
struct evdev_device *device;
wl_list_for_each(device, &seat->devices_list, link)
evdev_led_update(device, leds);
}
static const char default_seat[] = "seat0";
static void
device_added(struct udev_device *udev_device, struct fbdev_seat *master)
{
struct evdev_device *device;
const char *devnode;
const char *device_seat;
int fd;
device_seat = udev_device_get_property_value(udev_device, "ID_SEAT");
if (!device_seat)
device_seat = default_seat;
if (strcmp(device_seat, master->seat_id))
return;
devnode = udev_device_get_devnode(udev_device);
if (devnode == NULL) {
weston_log("Getting devnode for device on seat ‘%s’ failed.\n",
device_seat);
return;
}
/* Use non-blocking mode so that we can loop on read on
* evdev_device_data() until all events on the fd are
* read. mtdev_get() also expects this.
* O_CLOEXEC is added by weston_launcher_open(). */
fd = weston_launcher_open(master->base.compositor, devnode,
O_RDWR | O_NONBLOCK);
if (fd < 0) {
weston_log("opening input device '%s' failed.\n", devnode);
return;
}
device = evdev_device_create(&master->base, devnode, fd);
if (!device) {
close(fd);
weston_log("not using input device '%s'.\n", devnode);
return;
}
wl_list_insert(master->devices_list.prev, &device->link);
}
static void
evdev_add_devices(struct udev *udev, struct weston_seat *seat_base)
{
struct fbdev_seat *seat = to_fbdev_seat(seat_base);
struct udev_enumerate *e;
struct udev_list_entry *entry;
struct udev_device *device;
const char *path, *sysname;
e = udev_enumerate_new(udev);
if (e == NULL)
return;
if (udev_enumerate_add_match_subsystem(e, "input") < 0 ||
udev_enumerate_scan_devices(e) < 0)
goto out_enumerate;
udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
path = udev_list_entry_get_name(entry);
device = udev_device_new_from_syspath(udev, path);
if (device == NULL)
continue;
sysname = udev_device_get_sysname(device);
if (strncmp("event", sysname, 5) != 0) {
udev_device_unref(device);
continue;
}
device_added(device, seat);
udev_device_unref(device);
}
udev_enumerate_unref(e);
evdev_notify_keyboard_focus(&seat->base, &seat->devices_list);
if (wl_list_empty(&seat->devices_list)) {
weston_log(
"warning: no input devices on entering Weston. "
"Possible causes:\n"
"\t- no permissions to read /dev/input/event*\n"
"\t- seats misconfigured "
"(Weston backend option 'seat', "
"udev device property ID_SEAT)\n");
}
return;
out_enumerate:
udev_enumerate_unref(e);
weston_log("Failed to enumerate and add evdev devices.\n");
}
static int
evdev_udev_handler(int fd, uint32_t mask, void *data)
{
struct fbdev_seat *seat = data;
struct udev_device *udev_device;
struct evdev_device *device, *next;
const char *action;
const char *devnode;
udev_device = udev_monitor_receive_device(seat->udev_monitor);
if (!udev_device)
return 1;
action = udev_device_get_action(udev_device);
if (!action)
goto out;
if (strncmp("event", udev_device_get_sysname(udev_device), 5) != 0)
goto out;
if (!strcmp(action, "add")) {
device_added(udev_device, seat);
} else if (!strcmp(action, "remove")) {
devnode = udev_device_get_devnode(udev_device);
wl_list_for_each_safe(device, next, &seat->devices_list, link)
if (!strcmp(device->devnode, devnode)) {
weston_log("input device %s, %s removed\n",
device->devname, device->devnode);
evdev_device_destroy(device);
break;
}
}
out:
udev_device_unref(udev_device);
return 0;
}
static int
evdev_enable_udev_monitor(struct udev *udev, struct weston_seat *seat_base)
{
struct fbdev_seat *master = to_fbdev_seat(seat_base);
struct wl_event_loop *loop;
struct weston_compositor *c = master->base.compositor;
int fd;
master->udev_monitor = udev_monitor_new_from_netlink(udev, "udev");
if (!master->udev_monitor) {
weston_log("udev: failed to create the udev monitor\n");
goto out;
}
if (udev_monitor_filter_add_match_subsystem_devtype(master->udev_monitor,
"input",
NULL) < 0) {
weston_log("udev: failed to add filter\n");
goto out_monitor;
}
if (udev_monitor_enable_receiving(master->udev_monitor)) {
weston_log("udev: failed to bind the udev monitor\n");
goto out_monitor;
}
loop = wl_display_get_event_loop(c->wl_display);
fd = udev_monitor_get_fd(master->udev_monitor);
master->udev_monitor_source =
wl_event_loop_add_fd(loop, fd, WL_EVENT_READABLE,
evdev_udev_handler, master);
if (!master->udev_monitor_source)
goto out_monitor;
return 1;
out_monitor:
udev_monitor_unref(master->udev_monitor);
out:
return 0;
}
static void
evdev_disable_udev_monitor(struct weston_seat *seat_base)
{
struct fbdev_seat *seat = to_fbdev_seat(seat_base);
if (!seat->udev_monitor)
return;
udev_monitor_unref(seat->udev_monitor);
seat->udev_monitor = NULL;
wl_event_source_remove(seat->udev_monitor_source);
seat->udev_monitor_source = NULL;
}
static void
evdev_input_create(struct weston_compositor *c, struct udev *udev,
const char *seat_id)
{
struct fbdev_seat *seat;
seat = malloc(sizeof *seat);
if (seat == NULL)
return;
memset(seat, 0, sizeof *seat);
weston_seat_init(&seat->base, c);
seat->base.led_update = fbdev_led_update;
wl_list_init(&seat->devices_list);
seat->seat_id = strdup(seat_id);
if (seat->seat_id == NULL ||
!evdev_enable_udev_monitor(udev, &seat->base)) {
free(seat->seat_id);
free(seat);
return;
}
evdev_add_devices(udev, &seat->base);
}
static void
evdev_remove_devices(struct weston_seat *seat_base)
{
struct fbdev_seat *seat = to_fbdev_seat(seat_base);
struct evdev_device *device, *next;
wl_list_for_each_safe(device, next, &seat->devices_list, link)
evdev_device_destroy(device);
if (seat->base.seat.keyboard)
notify_keyboard_focus_out(&seat->base);
}
static void
evdev_input_destroy(struct weston_seat *seat_base)
{
struct fbdev_seat *seat = to_fbdev_seat(seat_base);
evdev_remove_devices(seat_base);
evdev_disable_udev_monitor(&seat->base);
weston_seat_release(seat_base);
free(seat->seat_id);
free(seat);
}
static void
fbdev_compositor_destroy(struct weston_compositor *base)
{
struct fbdev_compositor *compositor = to_fbdev_compositor(base);
struct weston_seat *seat, *next;
/* Destroy all inputs. */
wl_list_for_each_safe(seat, next, &compositor->base.seat_list, link)
evdev_input_destroy(seat);
/* Destroy the output. */
weston_compositor_shutdown(&compositor->base);
/* Chain up. */
compositor->base.renderer->destroy(&compositor->base);
tty_destroy(compositor->tty);
free(compositor);
}
static void
vt_func(struct weston_compositor *base, int event)
{
struct fbdev_compositor *compositor = to_fbdev_compositor(base);
struct weston_seat *seat;
struct weston_output *output;
switch (event) {
case TTY_ENTER_VT:
weston_log("entering VT\n");
compositor->base.focus = 1;
compositor->base.state = compositor->prev_state;
wl_list_for_each(output, &compositor->base.output_list, link) {
fbdev_output_reenable(compositor, output);
}
weston_compositor_damage_all(&compositor->base);
wl_list_for_each(seat, &compositor->base.seat_list, link) {
evdev_add_devices(compositor->udev, seat);
evdev_enable_udev_monitor(compositor->udev, seat);
}
break;
case TTY_LEAVE_VT:
weston_log("leaving VT\n");
wl_list_for_each(seat, &compositor->base.seat_list, link) {
evdev_disable_udev_monitor(seat);
evdev_remove_devices(seat);
}
wl_list_for_each(output, &compositor->base.output_list, link) {
fbdev_output_disable(output);
}
compositor->base.focus = 0;
compositor->prev_state = compositor->base.state;
compositor->base.state = WESTON_COMPOSITOR_SLEEPING;
/* If we have a repaint scheduled (from the idle handler), make
* sure we cancel that so we don't try to pageflip when we're
* vt switched away. The SLEEPING state will prevent
* further attemps at repainting. When we switch
* back, we schedule a repaint, which will process
* pending frame callbacks. */
wl_list_for_each(output,
&compositor->base.output_list, link) {
output->repaint_needed = 0;
}
break;
};
}
static void
fbdev_restore(struct weston_compositor *base)
{
struct fbdev_compositor *compositor = to_fbdev_compositor(base);
tty_reset(compositor->tty);
}
static void
switch_vt_binding(struct wl_seat *seat, uint32_t time, uint32_t key, void *data)
{
struct fbdev_compositor *ec = data;
tty_activate_vt(ec->tty, key - KEY_F1 + 1);
}
static struct weston_compositor *
fbdev_compositor_create(struct wl_display *display, int argc, char *argv[],
const char *config_file, struct fbdev_parameters *param)
{
struct fbdev_compositor *compositor;
const char *seat = default_seat;
uint32_t key;
weston_log("initializing fbdev backend\n");
compositor = calloc(1, sizeof *compositor);
if (compositor == NULL)
return NULL;
if (weston_compositor_init(&compositor->base, display, argc, argv,
config_file) < 0)
goto out_free;
compositor->udev = udev_new();
if (compositor->udev == NULL) {
weston_log("Failed to initialize udev context.\n");
goto out_compositor;
}
/* Set up the TTY. */
compositor->tty = tty_create(&compositor->base, vt_func, param->tty);
if (!compositor->tty) {
weston_log("Failed to initialize tty.\n");
goto out_udev;
}
compositor->base.destroy = fbdev_compositor_destroy;
compositor->base.restore = fbdev_restore;
compositor->base.focus = 1;
compositor->prev_state = WESTON_COMPOSITOR_ACTIVE;
for (key = KEY_F1; key < KEY_F9; key++)
weston_compositor_add_key_binding(&compositor->base, key,
MODIFIER_CTRL | MODIFIER_ALT,
switch_vt_binding,
compositor);
if (pixman_renderer_init(&compositor->base) < 0)
goto out_tty;
if (fbdev_output_create(compositor, param->device) < 0)
goto out_pixman;
evdev_input_create(&compositor->base, compositor->udev, seat);
return &compositor->base;
out_pixman:
compositor->base.renderer->destroy(&compositor->base);
out_tty:
tty_destroy(compositor->tty);
out_udev:
udev_unref(compositor->udev);
out_compositor:
weston_compositor_shutdown(&compositor->base);
out_free:
free(compositor);
return NULL;
}
WL_EXPORT struct weston_compositor *
backend_init(struct wl_display *display, int argc, char *argv[],
const char *config_file)
{
/* TODO: Ideally, available frame buffers should be enumerated using
* udev, rather than passing a device node in as a parameter. */
struct fbdev_parameters param = {
.tty = 0, /* default to current tty */
.device = "/dev/fb0", /* default frame buffer */
};
const struct weston_option fbdev_options[] = {
{ WESTON_OPTION_INTEGER, "tty", 0, &param.tty },
{ WESTON_OPTION_STRING, "device", 0, &param.device },
};
parse_options(fbdev_options, ARRAY_LENGTH(fbdev_options), argc, argv);
return fbdev_compositor_create(display, argc, argv, config_file,
&param);
}