weston/compositor/compositor-drm.c

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/*
* Copyright © 2008-2010 Kristian Høgsberg
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#define GL_GLEXT_PROTOTYPES
#define EGL_EGLEXT_PROTOTYPES
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include "compositor.h"
struct drm_compositor {
struct wlsc_compositor base;
struct udev *udev;
struct wl_event_source *drm_source;
struct udev_monitor *udev_monitor;
struct wl_event_source *udev_drm_source;
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struct {
int fd;
} drm;
uint32_t crtc_allocator;
uint32_t connector_allocator;
struct tty *tty;
};
struct drm_output {
struct wlsc_output base;
drmModeModeInfo mode;
uint32_t crtc_id;
uint32_t connector_id;
GLuint rbo[2];
uint32_t fb_id[2];
EGLImageKHR image[2];
uint32_t current;
};
static int
drm_output_prepare_render(struct wlsc_output *output_base)
{
struct drm_output *output = (struct drm_output *) output_base;
glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER,
output->rbo[output->current]);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
return -1;
return 0;
}
static int
drm_output_present(struct wlsc_output *output_base)
{
struct drm_output *output = (struct drm_output *) output_base;
struct drm_compositor *c =
(struct drm_compositor *) output->base.compositor;
if (drm_output_prepare_render(&output->base))
return -1;
glFlush();
output->current ^= 1;
drmModePageFlip(c->drm.fd, output->crtc_id,
output->fb_id[output->current ^ 1],
DRM_MODE_PAGE_FLIP_EVENT, output);
return 0;
}
static void
page_flip_handler(int fd, unsigned int frame,
unsigned int sec, unsigned int usec, void *data)
{
struct wlsc_output *output = data;
uint32_t msecs;
msecs = sec * 1000 + usec / 1000;
wlsc_output_finish_frame(output, msecs);
}
static void
on_drm_input(int fd, uint32_t mask, void *data)
{
drmEventContext evctx;
memset(&evctx, 0, sizeof evctx);
evctx.version = DRM_EVENT_CONTEXT_VERSION;
evctx.page_flip_handler = page_flip_handler;
drmHandleEvent(fd, &evctx);
}
static int
init_egl(struct drm_compositor *ec, struct udev_device *device)
{
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EGLint major, minor;
const char *extensions, *filename;
int fd;
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static const EGLint context_attribs[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE
};
filename = udev_device_get_devnode(device);
fd = open(filename, O_RDWR);
if (fd < 0) {
/* Probably permissions error */
fprintf(stderr, "couldn't open %s, skipping\n",
udev_device_get_devnode(device));
return -1;
}
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ec->drm.fd = fd;
ec->base.display = eglGetDRMDisplayMESA(ec->drm.fd);
if (ec->base.display == NULL) {
fprintf(stderr, "failed to create display\n");
return -1;
}
if (!eglInitialize(ec->base.display, &major, &minor)) {
fprintf(stderr, "failed to initialize display\n");
return -1;
}
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extensions = eglQueryString(ec->base.display, EGL_EXTENSIONS);
if (!strstr(extensions, "EGL_KHR_surfaceless_opengl")) {
fprintf(stderr, "EGL_KHR_surfaceless_opengl not available\n");
return -1;
}
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if (!eglBindAPI(EGL_OPENGL_ES_API)) {
fprintf(stderr, "failed to bind api EGL_OPENGL_ES_API\n");
return -1;
}
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ec->base.context = eglCreateContext(ec->base.display, NULL,
EGL_NO_CONTEXT, context_attribs);
if (ec->base.context == NULL) {
fprintf(stderr, "failed to create context\n");
return -1;
}
if (!eglMakeCurrent(ec->base.display, EGL_NO_SURFACE,
EGL_NO_SURFACE, ec->base.context)) {
fprintf(stderr, "failed to make context current\n");
return -1;
}
return 0;
}
static drmModeModeInfo builtin_1024x768 = {
63500, /* clock */
1024, 1072, 1176, 1328, 0,
768, 771, 775, 798, 0,
59920,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC,
0,
"1024x768"
};
static int
create_output_for_connector(struct drm_compositor *ec,
drmModeRes *resources,
drmModeConnector *connector,
int x, int y)
{
struct drm_output *output;
drmModeEncoder *encoder;
drmModeModeInfo *mode;
int i, ret;
EGLint handle, stride, attribs[] = {
EGL_WIDTH, 0,
EGL_HEIGHT, 0,
EGL_DRM_BUFFER_FORMAT_MESA, EGL_DRM_BUFFER_FORMAT_ARGB32_MESA,
EGL_DRM_BUFFER_USE_MESA, EGL_DRM_BUFFER_USE_SCANOUT_MESA,
EGL_NONE
};
output = malloc(sizeof *output);
if (output == NULL)
return -1;
if (connector->count_modes > 0)
mode = &connector->modes[0];
else
mode = &builtin_1024x768;
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encoder = drmModeGetEncoder(ec->drm.fd, connector->encoders[0]);
if (encoder == NULL) {
fprintf(stderr, "No encoder for connector.\n");
return -1;
}
for (i = 0; i < resources->count_crtcs; i++) {
if (encoder->possible_crtcs & (1 << i) &&
!(ec->crtc_allocator & (1 << resources->crtcs[i])))
break;
}
if (i == resources->count_crtcs) {
fprintf(stderr, "No usable crtc for encoder.\n");
return -1;
}
memset(output, 0, sizeof *output);
wlsc_output_init(&output->base, &ec->base, x, y,
mode->hdisplay, mode->vdisplay, 0);
output->crtc_id = resources->crtcs[i];
ec->crtc_allocator |= (1 << output->crtc_id);
output->connector_id = connector->connector_id;
ec->connector_allocator |= (1 << output->connector_id);
output->mode = *mode;
drmModeFreeEncoder(encoder);
glGenRenderbuffers(2, output->rbo);
for (i = 0; i < 2; i++) {
glBindRenderbuffer(GL_RENDERBUFFER, output->rbo[i]);
attribs[1] = output->base.width;
attribs[3] = output->base.height;
output->image[i] =
eglCreateDRMImageMESA(ec->base.display, attribs);
glEGLImageTargetRenderbufferStorageOES(GL_RENDERBUFFER,
output->image[i]);
eglExportDRMImageMESA(ec->base.display, output->image[i],
NULL, &handle, &stride);
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ret = drmModeAddFB(ec->drm.fd,
output->base.width, output->base.height,
32, 32, stride, handle, &output->fb_id[i]);
if (ret) {
fprintf(stderr, "failed to add fb %d: %m\n", i);
return -1;
}
}
output->current = 0;
glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER,
output->rbo[output->current]);
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ret = drmModeSetCrtc(ec->drm.fd, output->crtc_id,
output->fb_id[output->current ^ 1], 0, 0,
&output->connector_id, 1, &output->mode);
if (ret) {
fprintf(stderr, "failed to set mode: %m\n");
return -1;
}
output->base.prepare_render = drm_output_prepare_render;
output->base.present = drm_output_present;
wl_list_insert(ec->base.output_list.prev, &output->base.link);
return 0;
}
static int
create_outputs(struct drm_compositor *ec, int option_connector)
{
drmModeConnector *connector;
drmModeRes *resources;
int i;
int x = 0, y = 0;
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resources = drmModeGetResources(ec->drm.fd);
if (!resources) {
fprintf(stderr, "drmModeGetResources failed\n");
return -1;
}
for (i = 0; i < resources->count_connectors; i++) {
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connector = drmModeGetConnector(ec->drm.fd, resources->connectors[i]);
if (connector == NULL)
continue;
if (connector->connection == DRM_MODE_CONNECTED &&
(option_connector == 0 ||
connector->connector_id == option_connector))
if (create_output_for_connector(ec, resources,
connector, x, y) < 0)
return -1;
x += container_of(ec->base.output_list.prev, struct wlsc_output,
link)->width;
drmModeFreeConnector(connector);
}
if (wl_list_empty(&ec->base.output_list)) {
fprintf(stderr, "No currently active connector found.\n");
return -1;
}
drmModeFreeResources(resources);
return 0;
}
static int
destroy_output(struct drm_output *output)
{
struct drm_compositor *ec =
(struct drm_compositor *) output->base.compositor;
int i;
glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER,
0);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
glDeleteRenderbuffers(2, output->rbo);
for (i = 0; i < 2; i++) {
eglDestroyImageKHR(ec->base.display, output->image[i]);
drmModeRmFB(ec->drm.fd, output->fb_id[i]);
}
ec->crtc_allocator &= ~(1 << output->crtc_id);
ec->connector_allocator &= ~(1 << output->connector_id);
wlsc_output_destroy(&output->base);
wl_list_remove(&output->base.link);
free(output);
return 0;
}
static void
update_outputs(struct drm_compositor *ec)
{
drmModeConnector *connector;
drmModeRes *resources;
struct drm_output *output, *next;
int x = 0, y = 0;
int x_offset = 0, y_offset = 0;
uint32_t connected = 0, disconnects = 0;
int i;
resources = drmModeGetResources(ec->drm.fd);
if (!resources) {
fprintf(stderr, "drmModeGetResources failed\n");
return;
}
/* collect new connects */
for (i = 0; i < resources->count_connectors; i++) {
connector =
drmModeGetConnector(ec->drm.fd,
resources->connectors[i]);
if (connector == NULL ||
connector->connection != DRM_MODE_CONNECTED)
continue;
connected |= (1 << connector->connector_id);
if (!(ec->connector_allocator & (1 << connector->connector_id))) {
struct wlsc_output *last_output =
container_of(ec->base.output_list.prev,
struct wlsc_output, link);
/* XXX: not yet needed, we die with 0 outputs */
if (!wl_list_empty(&ec->base.output_list))
x = last_output->x + last_output->width;
else
x = 0;
y = 0;
create_output_for_connector(ec, resources,
connector, x, y);
printf("connector %d connected\n",
connector->connector_id);
}
drmModeFreeConnector(connector);
}
drmModeFreeResources(resources);
disconnects = ec->connector_allocator & ~connected;
if (disconnects) {
wl_list_for_each_safe(output, next, &ec->base.output_list,
base.link) {
if (x_offset != 0 || y_offset != 0) {
wlsc_output_move(&output->base,
output->base.x - x_offset,
output->base.y - y_offset);
}
if (disconnects & (1 << output->connector_id)) {
disconnects &= ~(1 << output->connector_id);
printf("connector %d disconnected\n",
output->connector_id);
x_offset += output->base.width;
destroy_output(output);
}
}
}
/* FIXME: handle zero outputs, without terminating */
if (ec->connector_allocator == 0)
wl_display_terminate(ec->base.wl_display);
}
static int
udev_event_is_hotplug(struct udev_device *device)
{
struct udev_list_entry *list, *hotplug_entry;
list = udev_device_get_properties_list_entry(device);
hotplug_entry = udev_list_entry_get_by_name(list, "HOTPLUG");
if (hotplug_entry == NULL)
return 0;
return strcmp(udev_list_entry_get_value(hotplug_entry), "1") == 0;
}
static void
udev_drm_event(int fd, uint32_t mask, void *data)
{
struct drm_compositor *ec = data;
struct udev_device *event;
event = udev_monitor_receive_device(ec->udev_monitor);
if (udev_event_is_hotplug(event))
update_outputs(ec);
udev_device_unref(event);
}
static void
drm_destroy(struct wlsc_compositor *ec)
{
struct drm_compositor *d = (struct drm_compositor *) ec;
tty_destroy(d->tty);
free(d);
}
struct wlsc_compositor *
drm_compositor_create(struct wl_display *display, int connector)
{
struct drm_compositor *ec;
struct udev_enumerate *e;
struct udev_list_entry *entry;
struct udev_device *device;
const char *path;
struct wl_event_loop *loop;
ec = malloc(sizeof *ec);
if (ec == NULL)
return NULL;
memset(ec, 0, sizeof *ec);
ec->udev = udev_new();
if (ec->udev == NULL) {
fprintf(stderr, "failed to initialize udev context\n");
return NULL;
}
e = udev_enumerate_new(ec->udev);
udev_enumerate_add_match_subsystem(e, "drm");
udev_enumerate_add_match_property(e, "WAYLAND_SEAT", "1");
udev_enumerate_scan_devices(e);
device = NULL;
udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
path = udev_list_entry_get_name(entry);
device = udev_device_new_from_syspath(ec->udev, path);
break;
}
udev_enumerate_unref(e);
if (device == NULL) {
fprintf(stderr, "no drm device found\n");
return NULL;
}
ec->base.wl_display = display;
if (init_egl(ec, device) < 0) {
fprintf(stderr, "failed to initialize egl\n");
return NULL;
}
ec->base.destroy = drm_destroy;
ec->base.create_buffer = wlsc_shm_buffer_create;
ec->base.focus = 1;
glGenFramebuffers(1, &ec->base.fbo);
glBindFramebuffer(GL_FRAMEBUFFER, ec->base.fbo);
/* Can't init base class until we have a current egl context */
if (wlsc_compositor_init(&ec->base, display) < 0)
return NULL;
if (create_outputs(ec, connector) < 0) {
fprintf(stderr, "failed to create output for %s\n", path);
return NULL;
}
evdev_input_add_devices(&ec->base, ec->udev);
loop = wl_display_get_event_loop(ec->base.wl_display);
ec->drm_source =
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wl_event_loop_add_fd(loop, ec->drm.fd,
WL_EVENT_READABLE, on_drm_input, ec);
ec->tty = tty_create(&ec->base);
ec->udev_monitor = udev_monitor_new_from_netlink(ec->udev, "udev");
if (ec->udev_monitor == NULL) {
fprintf(stderr, "failed to intialize udev monitor\n");
return NULL;
}
udev_monitor_filter_add_match_subsystem_devtype(ec->udev_monitor,
"drm", NULL);
ec->udev_drm_source =
wl_event_loop_add_fd(loop, udev_monitor_get_fd(ec->udev_monitor),
WL_EVENT_READABLE, udev_drm_event, ec);
if (udev_monitor_enable_receiving(ec->udev_monitor) < 0) {
fprintf(stderr, "failed to enable udev-monitor receiving\n");
return NULL;
}
return &ec->base;
}