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This commit is contained in:
Scott Anderson 2017-05-01 17:49:18 +12:00
parent 9ac46ec5ed
commit 41a82fd2fc
13 changed files with 395 additions and 350 deletions
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2
backend/CMakeLists.txt
View file

@ -9,9 +9,9 @@ add_library(wlr-backend
wayland/registry.c wayland/registry.c
wayland/wl_seat.c wayland/wl_seat.c
wayland/wl_output.c wayland/wl_output.c
drm/backend.c
drm/drm.c drm/drm.c
drm/event.c drm/event.c
drm/otd.c
drm/session.c drm/session.c
drm/udev.c drm/udev.c
) )

71
backend/drm/backend.c Normal file
View file

@ -0,0 +1,71 @@
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include "backend/drm/backend.h"
#include "backend/drm/drm.h"
#include "backend/drm/event.h"
#include "backend/drm/session.h"
#include "backend/drm/udev.h"
struct wlr_drm_backend *wlr_drm_backend_init(void)
{
struct wlr_drm_backend *backend = calloc(1, sizeof *backend);
if (!backend)
return NULL;
if (!wlr_session_start(&backend->session)) {
fprintf(stderr, "Could not create session\n");
goto error;
}
if (!wlr_udev_init(&backend->udev)) {
fprintf(stderr, "Could not start udev\n");
goto error_session;
}
backend->fd = wlr_udev_find_gpu(&backend->udev, &backend->session);
if (backend->fd == -1) {
fprintf(stderr, "Could not open GPU\n");
goto error_udev;
}
if (!wlr_drm_renderer_init(&backend->renderer, backend, backend->fd)) {
fprintf(stderr, "Could not initalise renderer\n");
goto error_fd;
}
wlr_drm_scan_connectors(backend);
return backend;
error_fd:
wlr_session_release_device(&backend->session, backend->fd);
error_udev:
wlr_udev_free(&backend->udev);
error_session:
wlr_session_end(&backend->session);
error:
free(backend);
return NULL;
}
void wlr_drm_backend_free(struct wlr_drm_backend *backend)
{
if (!backend)
return;
for (size_t i = 0; i < backend->display_len; ++i) {
wlr_drm_display_free(&backend->displays[i]);
}
wlr_drm_renderer_free(&backend->renderer);
wlr_udev_free(&backend->udev);
wlr_session_release_device(&backend->session, backend->fd);
wlr_session_end(&backend->session);
free(backend->events);
free(backend->displays);
free(backend);
}

188
backend/drm/drm.c
View file

@ -1,4 +1,4 @@
#include "backend/drm/otd.h" #include "backend/drm/backend.h"
#include "backend/drm/drm.h" #include "backend/drm/drm.h"
#include "backend/drm/event.h" #include "backend/drm/event.h"
@ -51,7 +51,7 @@ static bool egl_exts()
return get_platform_display && create_platform_window_surface; return get_platform_display && create_platform_window_surface;
} }
bool egl_get_config(EGLDisplay disp, EGLConfig *out) static bool egl_get_config(EGLDisplay disp, EGLConfig *out)
{ {
EGLint count = 0, matched = 0, ret; EGLint count = 0, matched = 0, ret;
@ -85,15 +85,16 @@ bool egl_get_config(EGLDisplay disp, EGLConfig *out)
return false; return false;
} }
bool init_renderer(struct otd *otd) bool wlr_drm_renderer_init(struct wlr_drm_renderer *renderer,
struct wlr_drm_backend *backend, int fd)
{ {
if (!egl_exts()) { if (!egl_exts()) {
fprintf(stderr, "Could not get EGL extensions\n"); fprintf(stderr, "Could not get EGL extensions\n");
return false; return false;
} }
otd->gbm = gbm_create_device(otd->fd); renderer->gbm = gbm_create_device(fd);
if (!otd->gbm) { if (!renderer->gbm) {
fprintf(stderr, "Could not create gbm device: %s\n", strerror(errno)); fprintf(stderr, "Could not create gbm device: %s\n", strerror(errno));
return false; return false;
} }
@ -103,103 +104,109 @@ bool init_renderer(struct otd *otd)
goto error_gbm; goto error_gbm;
} }
otd->egl.disp = get_platform_display(EGL_PLATFORM_GBM_MESA, otd->gbm, NULL); renderer->egl.disp = get_platform_display(EGL_PLATFORM_GBM_MESA, renderer->gbm, NULL);
if (otd->egl.disp == EGL_NO_DISPLAY) { if (renderer->egl.disp == EGL_NO_DISPLAY) {
fprintf(stderr, "Could not create EGL display\n"); fprintf(stderr, "Could not create EGL display\n");
goto error_gbm; goto error_gbm;
} }
if (eglInitialize(otd->egl.disp, NULL, NULL) == EGL_FALSE) { if (eglInitialize(renderer->egl.disp, NULL, NULL) == EGL_FALSE) {
fprintf(stderr, "Could not initalise EGL\n"); fprintf(stderr, "Could not initalise EGL\n");
goto error_egl; goto error_egl;
} }
if (!egl_get_config(otd->egl.disp, &otd->egl.conf)) { if (!egl_get_config(renderer->egl.disp, &renderer->egl.conf)) {
fprintf(stderr, "Could not get EGL config\n"); fprintf(stderr, "Could not get EGL config\n");
goto error_egl; goto error_egl;
} }
static const EGLint attribs[] = {EGL_CONTEXT_CLIENT_VERSION, 3, EGL_NONE}; static const EGLint attribs[] = {EGL_CONTEXT_CLIENT_VERSION, 3, EGL_NONE};
otd->egl.context = eglCreateContext(otd->egl.disp, otd->egl.conf, EGL_NO_CONTEXT, attribs);
if (otd->egl.context == EGL_NO_CONTEXT) { renderer->egl.context = eglCreateContext(renderer->egl.disp,
renderer->egl.conf, EGL_NO_CONTEXT, attribs);
if (renderer->egl.context == EGL_NO_CONTEXT) {
fprintf(stderr, "Could not create EGL context\n"); fprintf(stderr, "Could not create EGL context\n");
goto error_egl; goto error_egl;
} }
renderer->fd = fd;
renderer->backend = backend;
return true; return true;
error_egl: error_egl:
eglTerminate(otd->egl.disp); eglTerminate(renderer->egl.disp);
eglReleaseThread(); eglReleaseThread();
eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
error_gbm: error_gbm:
gbm_device_destroy(otd->gbm); gbm_device_destroy(renderer->gbm);
return false; return false;
} }
void destroy_renderer(struct otd *otd) void wlr_drm_renderer_free(struct wlr_drm_renderer *renderer)
{ {
if (!otd) if (!renderer)
return; return;
eglDestroyContext(otd->egl.disp, otd->egl.context); eglDestroyContext(renderer->egl.disp, renderer->egl.context);
eglTerminate(otd->egl.disp); eglTerminate(renderer->egl.disp);
eglReleaseThread(); eglReleaseThread();
eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
gbm_device_destroy(otd->gbm); gbm_device_destroy(renderer->gbm);
} }
void scan_connectors(struct otd *otd) void wlr_drm_scan_connectors(struct wlr_drm_backend *backend)
{ {
drmModeRes *res = drmModeGetResources(otd->fd); drmModeRes *res = drmModeGetResources(backend->fd);
if (!res) if (!res)
return; return;
// I don't know if this needs to be allocated with realloc like this, // I don't know if this needs to be allocated with realloc like this,
// as it may not even be possible for the number of connectors to change. // as it may not even be possible for the number of connectors to change.
// I'll just have to see how DisplayPort MST works with DRM. // I'll just have to see how DisplayPort MST works with DRM.
if ((size_t)res->count_connectors > otd->display_len) { if ((size_t)res->count_connectors > backend->display_len) {
struct otd_display *new = realloc(otd->displays, sizeof *new * res->count_connectors); struct wlr_drm_display *new = realloc(backend->displays, sizeof *new * res->count_connectors);
if (!new) if (!new)
goto error; goto error;
for (int i = otd->display_len; i < res->count_connectors; ++i) { for (int i = backend->display_len; i < res->count_connectors; ++i) {
new[i] = (struct otd_display) { new[i] = (struct wlr_drm_display) {
.state = OTD_DISP_INVALID, .state = DRM_DISP_INVALID,
.otd = otd, .renderer = &backend->renderer,
}; };
} }
otd->display_len = res->count_connectors; backend->display_len = res->count_connectors;
otd->displays = new; backend->displays = new;
} }
for (int i = 0; i < res->count_connectors; ++i) { for (int i = 0; i < res->count_connectors; ++i) {
struct otd_display *disp = &otd->displays[i]; struct wlr_drm_display *disp = &backend->displays[i];
drmModeConnector *conn = drmModeGetConnector(otd->fd, res->connectors[i]); drmModeConnector *conn = drmModeGetConnector(backend->fd, res->connectors[i]);
if (!conn) if (!conn)
continue; continue;
if (otd->displays[i].state == OTD_DISP_INVALID) { if (backend->displays[i].state == DRM_DISP_INVALID) {
disp->state = OTD_DISP_DISCONNECTED; disp->state = DRM_DISP_DISCONNECTED;
disp->connector = res->connectors[i]; disp->connector = res->connectors[i];
snprintf(disp->name, sizeof disp->name, "%s-%"PRIu32, snprintf(disp->name, sizeof disp->name, "%s-%"PRIu32,
conn_name[conn->connector_type], conn_name[conn->connector_type],
conn->connector_type_id); conn->connector_type_id);
} }
if (disp->state == OTD_DISP_DISCONNECTED && if (disp->state == DRM_DISP_DISCONNECTED &&
conn->connection == DRM_MODE_CONNECTED) { conn->connection == DRM_MODE_CONNECTED) {
disp->state = OTD_DISP_NEEDS_MODESET; disp->state = DRM_DISP_NEEDS_MODESET;
event_add(otd, disp, OTD_EV_DISPLAY_ADD); wlr_drm_add_event(backend, disp, DRM_EV_DISPLAY_ADD);
} else if (disp->state == OTD_DISP_CONNECTED && } else if (disp->state == DRM_DISP_CONNECTED &&
conn->connection != DRM_MODE_CONNECTED) { conn->connection != DRM_MODE_CONNECTED) {
disp->state = OTD_DISP_DISCONNECTED; disp->state = DRM_DISP_DISCONNECTED;
event_add(otd, disp, OTD_EV_DISPLAY_REM); wlr_drm_add_event(backend, disp, DRM_EV_DISPLAY_REM);
} }
drmModeFreeConnector(conn); drmModeFreeConnector(conn);
@ -238,44 +245,49 @@ static uint32_t get_fb_for_bo(int fd, struct gbm_bo *bo)
return *id; return *id;
} }
static void init_display_renderer(struct otd *otd, struct otd_display *disp) static bool display_init_renderer(struct wlr_drm_renderer *renderer,
struct wlr_drm_display *disp)
{ {
disp->gbm = gbm_surface_create(otd->gbm, disp->renderer = renderer;
disp->gbm = gbm_surface_create(renderer->gbm,
disp->width, disp->height, disp->width, disp->height,
GBM_FORMAT_XRGB8888, GBM_FORMAT_XRGB8888,
GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING); GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);
if (!disp->gbm) if (!disp->gbm)
return; return false;
disp->egl = create_platform_window_surface(otd->egl.disp, otd->egl.conf, disp->egl = create_platform_window_surface(renderer->egl.disp, renderer->egl.conf,
disp->gbm, NULL); disp->gbm, NULL);
if (disp->egl == EGL_NO_SURFACE) if (disp->egl == EGL_NO_SURFACE)
return; return false;
// Render black frame // Render black frame
eglMakeCurrent(otd->egl.disp, disp->egl, disp->egl, otd->egl.context); eglMakeCurrent(renderer->egl.disp, disp->egl, disp->egl, renderer->egl.context);
glViewport(0, 0, disp->width, disp->height); glViewport(0, 0, disp->width, disp->height);
glClearColor(0.0, 0.0, 0.0, 1.0); glClearColor(0.0, 0.0, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT); glClear(GL_COLOR_BUFFER_BIT);
eglSwapBuffers(otd->egl.disp, disp->egl); eglSwapBuffers(renderer->egl.disp, disp->egl);
struct gbm_bo *bo = gbm_surface_lock_front_buffer(disp->gbm); struct gbm_bo *bo = gbm_surface_lock_front_buffer(disp->gbm);
uint32_t fb_id = get_fb_for_bo(otd->fd, bo); uint32_t fb_id = get_fb_for_bo(renderer->fd, bo);
drmModeSetCrtc(otd->fd, disp->crtc, fb_id, 0, 0, drmModeSetCrtc(renderer->fd, disp->crtc, fb_id, 0, 0,
&disp->connector, 1, disp->active_mode); &disp->connector, 1, disp->active_mode);
drmModePageFlip(otd->fd, disp->crtc, fb_id, DRM_MODE_PAGE_FLIP_EVENT, disp); drmModePageFlip(renderer->fd, disp->crtc, fb_id, DRM_MODE_PAGE_FLIP_EVENT, disp);
gbm_surface_release_buffer(disp->gbm, bo); gbm_surface_release_buffer(disp->gbm, bo);
return true;
} }
static drmModeModeInfo *select_mode(size_t num_modes, static drmModeModeInfo *select_mode(size_t num_modes,
drmModeModeInfo modes[static num_modes], drmModeModeInfo modes[static num_modes],
drmModeCrtc *old_crtc, drmModeCrtc *old_crtc,
const char *str) const char *str)
{ {
if (strcmp(str, "preferred") == 0) if (strcmp(str, "preferred") == 0)
return &modes[0]; return &modes[0];
@ -315,9 +327,10 @@ static drmModeModeInfo *select_mode(size_t num_modes,
return NULL; return NULL;
} }
bool modeset_str(struct otd *otd, struct otd_display *disp, const char *str) bool wlr_drm_display_modeset(struct wlr_drm_backend *backend,
struct wlr_drm_display *disp, const char *str)
{ {
drmModeConnector *conn = drmModeGetConnector(otd->fd, disp->connector); drmModeConnector *conn = drmModeGetConnector(backend->fd, disp->connector);
if (!conn || conn->connection != DRM_MODE_CONNECTED || conn->count_modes == 0) if (!conn || conn->connection != DRM_MODE_CONNECTED || conn->count_modes == 0)
goto error; goto error;
@ -327,9 +340,9 @@ bool modeset_str(struct otd *otd, struct otd_display *disp, const char *str)
goto error; goto error;
memcpy(disp->modes, conn->modes, sizeof *disp->modes * disp->num_modes); memcpy(disp->modes, conn->modes, sizeof *disp->modes * disp->num_modes);
drmModeEncoder *curr_enc = drmModeGetEncoder(otd->fd, conn->encoder_id); drmModeEncoder *curr_enc = drmModeGetEncoder(backend->fd, conn->encoder_id);
if (curr_enc) { if (curr_enc) {
disp->old_crtc = drmModeGetCrtc(otd->fd, curr_enc->crtc_id); disp->old_crtc = drmModeGetCrtc(backend->fd, curr_enc->crtc_id);
free(curr_enc); free(curr_enc);
} }
@ -343,13 +356,13 @@ bool modeset_str(struct otd *otd, struct otd_display *disp, const char *str)
disp->name, disp->active_mode->hdisplay, disp->active_mode->vdisplay, disp->name, disp->active_mode->hdisplay, disp->active_mode->vdisplay,
disp->active_mode->vrefresh); disp->active_mode->vrefresh);
drmModeRes *res = drmModeGetResources(otd->fd); drmModeRes *res = drmModeGetResources(backend->fd);
if (!res) if (!res)
goto error; goto error;
bool success = false; bool success = false;
for (int i = 0; !success && i < conn->count_encoders; ++i) { for (int i = 0; !success && i < conn->count_encoders; ++i) {
drmModeEncoder *enc = drmModeGetEncoder(otd->fd, conn->encoders[i]); drmModeEncoder *enc = drmModeGetEncoder(backend->fd, conn->encoders[i]);
if (!enc) if (!enc)
continue; continue;
@ -357,8 +370,8 @@ bool modeset_str(struct otd *otd, struct otd_display *disp, const char *str)
if ((enc->possible_crtcs & (1 << j)) == 0) if ((enc->possible_crtcs & (1 << j)) == 0)
continue; continue;
if ((otd->taken_crtcs & (1 << j)) == 0) { if ((backend->taken_crtcs & (1 << j)) == 0) {
otd->taken_crtcs |= 1 << j; backend->taken_crtcs |= 1 << j;
disp->crtc = res->crtcs[j]; disp->crtc = res->crtcs[j];
success = true; success = true;
@ -374,45 +387,48 @@ bool modeset_str(struct otd *otd, struct otd_display *disp, const char *str)
if (!success) if (!success)
goto error; goto error;
disp->state = OTD_DISP_CONNECTED; disp->state = DRM_DISP_CONNECTED;
drmModeFreeConnector(conn); drmModeFreeConnector(conn);
disp->width = disp->active_mode->hdisplay; disp->width = disp->active_mode->hdisplay;
disp->height = disp->active_mode->vdisplay; disp->height = disp->active_mode->vdisplay;
init_display_renderer(otd, disp); display_init_renderer(&backend->renderer, disp);
return true; return true;
error: error:
disp->state = OTD_DISP_DISCONNECTED; disp->state = DRM_DISP_DISCONNECTED;
drmModeFreeConnector(conn); drmModeFreeConnector(conn);
event_add(otd, disp, OTD_EV_DISPLAY_REM); wlr_drm_add_event(backend, disp, DRM_EV_DISPLAY_REM);
return false; return false;
} }
static void page_flip_handler(int fd,
void page_flip_handler(int fd, unsigned seq,
unsigned seq, unsigned tv_sec,
unsigned tv_sec, unsigned tv_usec,
unsigned tv_usec, void *user)
void *user)
{ {
struct otd_display *disp = user; struct wlr_drm_display *disp = user;
disp->pageflip_pending = true; disp->pageflip_pending = true;
if (!disp->cleanup) if (!disp->cleanup)
event_add(disp->otd, disp, OTD_EV_RENDER); wlr_drm_add_event(disp->renderer->backend, disp, DRM_EV_RENDER);
} }
void destroy_display_renderer(struct otd *otd, struct otd_display *disp) void wlr_drm_display_free(struct wlr_drm_display *disp)
{ {
if (!otd || !disp || disp->state != OTD_DISP_CONNECTED) if (!disp || disp->state != DRM_DISP_CONNECTED)
return; return;
struct wlr_drm_renderer *renderer = disp->renderer;
drmModeCrtc *crtc = disp->old_crtc; drmModeCrtc *crtc = disp->old_crtc;
if (crtc) { if (crtc) {
// Wait for exising page flips to finish
drmEventContext event = { drmEventContext event = {
.version = DRM_EVENT_CONTEXT_VERSION, .version = DRM_EVENT_CONTEXT_VERSION,
.page_flip_handler = page_flip_handler, .page_flip_handler = page_flip_handler,
@ -420,45 +436,45 @@ void destroy_display_renderer(struct otd *otd, struct otd_display *disp)
disp->cleanup = true; disp->cleanup = true;
while (disp->pageflip_pending) while (disp->pageflip_pending)
drmHandleEvent(otd->fd, &event); drmHandleEvent(renderer->fd, &event);
drmModeSetCrtc(otd->fd, crtc->crtc_id, crtc->buffer_id, drmModeSetCrtc(renderer->fd, crtc->crtc_id, crtc->buffer_id,
crtc->x, crtc->y, &disp->connector, crtc->x, crtc->y, &disp->connector,
1, &crtc->mode); 1, &crtc->mode);
drmModeFreeCrtc(crtc); drmModeFreeCrtc(crtc);
} }
eglDestroySurface(otd->egl.disp, disp->egl); eglDestroySurface(renderer->egl.disp, disp->egl);
gbm_surface_destroy(disp->gbm); gbm_surface_destroy(disp->gbm);
free(disp->modes); free(disp->modes);
} }
void get_drm_event(struct otd *otd) void wlr_drm_event(int fd)
{ {
drmEventContext event = { drmEventContext event = {
.version = DRM_EVENT_CONTEXT_VERSION, .version = DRM_EVENT_CONTEXT_VERSION,
.page_flip_handler = page_flip_handler, .page_flip_handler = page_flip_handler,
}; };
drmHandleEvent(otd->fd, &event); drmHandleEvent(fd, &event);
} }
void rendering_begin(struct otd_display *disp) void wlr_drm_display_begin(struct wlr_drm_display *disp)
{ {
struct otd *otd = disp->otd; struct wlr_drm_renderer *renderer = disp->renderer;
eglMakeCurrent(otd->egl.disp, disp->egl, disp->egl, otd->egl.context); eglMakeCurrent(renderer->egl.disp, disp->egl, disp->egl, renderer->egl.context);
} }
void rendering_end(struct otd_display *disp) void wlr_drm_display_end(struct wlr_drm_display *disp)
{ {
struct otd *otd = disp->otd; struct wlr_drm_renderer *renderer = disp->renderer;
eglSwapBuffers(otd->egl.disp, disp->egl); eglSwapBuffers(renderer->egl.disp, disp->egl);
struct gbm_bo *bo = gbm_surface_lock_front_buffer(disp->gbm); struct gbm_bo *bo = gbm_surface_lock_front_buffer(disp->gbm);
uint32_t fb_id = get_fb_for_bo(otd->fd, bo); uint32_t fb_id = get_fb_for_bo(renderer->fd, bo);
drmModePageFlip(otd->fd, disp->crtc, fb_id, DRM_MODE_PAGE_FLIP_EVENT, disp); drmModePageFlip(renderer->fd, disp->crtc, fb_id, DRM_MODE_PAGE_FLIP_EVENT, disp);
gbm_surface_release_buffer(disp->gbm, bo); gbm_surface_release_buffer(disp->gbm, bo);

54
backend/drm/event.c
View file

@ -1,47 +1,48 @@
#include "backend/drm/otd.h"
#include "backend/drm/event.h"
#include "backend/drm/drm.h"
#include "backend/drm/udev.h"
#include <stdbool.h> #include <stdbool.h>
#include <stdlib.h> #include <stdlib.h>
#include <poll.h> #include <poll.h>
static inline void event_swap(struct otd_event *a, struct otd_event *b) #include "backend/drm/backend.h"
#include "backend/drm/event.h"
#include "backend/drm/drm.h"
#include "backend/drm/udev.h"
static inline void event_swap(struct wlr_drm_event *a, struct wlr_drm_event *b)
{ {
struct otd_event tmp = *a; struct wlr_drm_event tmp = *a;
*a = *b; *a = *b;
*b = tmp; *b = tmp;
} }
bool otd_get_event(struct otd *otd, struct otd_event *restrict ret) bool wlr_drm_get_event(struct wlr_drm_backend *backend,
struct wlr_drm_event *restrict ret)
{ {
struct pollfd fds[] = { struct pollfd fds[] = {
{ .fd = otd->fd, .events = POLLIN }, { .fd = backend->fd, .events = POLLIN },
{ .fd = otd->udev_fd, .events = POLLIN }, { .fd = backend->udev.mon_fd, .events = POLLIN },
}; };
while (poll(fds, 2, 0) > 0) { while (poll(fds, 2, 0) > 0) {
if (fds[0].revents) if (fds[0].revents)
get_drm_event(otd); wlr_drm_event(backend->fd);
if (fds[1].revents) if (fds[1].revents)
otd_udev_event(otd); wlr_udev_event(backend);
} }
if (otd->event_len == 0) { if (backend->event_len == 0) {
ret->type = OTD_EV_NONE; ret->type = DRM_EV_NONE;
ret->display = NULL; ret->display = NULL;
return false; return false;
} }
struct otd_event *ev = otd->events; struct wlr_drm_event *ev = backend->events;
// Downheap // Downheap
*ret = ev[0]; *ret = ev[0];
ev[0] = ev[--otd->event_len]; ev[0] = ev[--backend->event_len];
size_t i = 0; size_t i = 0;
while (i < otd->event_len / 2) { while (i < backend->event_len / 2) {
size_t left = i * 2 + 1; size_t left = i * 2 + 1;
size_t right = i * 2 + 2; size_t right = i * 2 + 2;
size_t max = (ev[left].type > ev[right].type) ? left : right; size_t max = (ev[left].type > ev[right].type) ? left : right;
@ -57,27 +58,28 @@ bool otd_get_event(struct otd *otd, struct otd_event *restrict ret)
return true; return true;
} }
bool event_add(struct otd *otd, struct otd_display *disp, enum otd_event_type type) bool wlr_drm_add_event(struct wlr_drm_backend *backend,
struct wlr_drm_display *disp, enum wlr_drm_event_type type)
{ {
if (type == OTD_EV_NONE) if (type == DRM_EV_NONE)
return true; return true;
if (otd->event_len == otd->event_cap) { if (backend->event_len == backend->event_cap) {
size_t new_size = (otd->event_cap == 0) ? 8 : otd->event_cap * 2; size_t new_size = (backend->event_cap == 0) ? 8 : backend->event_cap * 2;
struct otd_event *new = realloc(otd->events, sizeof *new * new_size); struct wlr_drm_event *new = realloc(backend->events, sizeof *new * new_size);
if (!new) { if (!new) {
return false; return false;
} }
otd->event_cap = new_size; backend->event_cap = new_size;
otd->events = new; backend->events = new;
} }
struct otd_event *ev = otd->events; struct wlr_drm_event *ev = backend->events;
// Upheap // Upheap
size_t i = otd->event_len++; size_t i = backend->event_len++;
ev[i].type = type; ev[i].type = type;
ev[i].display = disp; ev[i].display = disp;

71
backend/drm/otd.c
View file

@ -1,71 +0,0 @@
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include "backend/drm/otd.h"
#include "backend/drm/drm.h"
#include "backend/drm/event.h"
#include "backend/drm/session.h"
#include "backend/drm/udev.h"
struct otd *otd_start(void)
{
struct otd *otd = calloc(1, sizeof *otd);
if (!otd)
return NULL;
if (!otd_new_session(otd)) {
fprintf(stderr, "Could not create session\n");
goto error;
}
if (!otd_udev_start(otd)) {
fprintf(stderr, "Could not start udev\n");
goto error_session;
}
otd_udev_find_gpu(otd);
if (otd->fd == -1) {
fprintf(stderr, "Could not open GPU\n");
goto error_udev;
}
if (!init_renderer(otd)) {
fprintf(stderr, "Could not initalise renderer\n");
goto error_fd;
}
scan_connectors(otd);
return otd;
error_fd:
release_device(otd, otd->fd);
error_udev:
otd_udev_finish(otd);
error_session:
otd_close_session(otd);
error:
free(otd);
return NULL;
}
void otd_finish(struct otd *otd)
{
if (!otd)
return;
for (size_t i = 0; i < otd->display_len; ++i) {
destroy_display_renderer(otd, &otd->displays[i]);
}
destroy_renderer(otd);
otd_close_session(otd);
otd_udev_finish(otd);
close(otd->fd);
free(otd->events);
free(otd->displays);
free(otd);
}

83
backend/drm/session.c
View file

@ -11,18 +11,17 @@
#include <sys/stat.h> #include <sys/stat.h>
#include <fcntl.h> #include <fcntl.h>
#include "backend/drm/backend.h"
#include "backend/drm/session.h" #include "backend/drm/session.h"
#include "backend/drm/otd.h"
int take_device(struct otd *restrict otd, int wlr_session_take_device(struct wlr_session *restrict session,
const char *restrict path, const char *restrict path,
bool *restrict paused_out) bool *restrict paused_out)
{ {
int ret; int ret;
int fd = -1; int fd = -1;
sd_bus_message *msg = NULL; sd_bus_message *msg = NULL;
sd_bus_error error = SD_BUS_ERROR_NULL; sd_bus_error error = SD_BUS_ERROR_NULL;
struct otd_session *s = &otd->session;
struct stat st; struct stat st;
if (stat(path, &st) < 0) { if (stat(path, &st) < 0) {
@ -30,9 +29,9 @@ int take_device(struct otd *restrict otd,
return -1; return -1;
} }
ret = sd_bus_call_method(s->bus, ret = sd_bus_call_method(session->bus,
"org.freedesktop.login1", "org.freedesktop.login1",
s->path, session->path,
"org.freedesktop.login1.Session", "org.freedesktop.login1.Session",
"TakeDevice", "TakeDevice",
&error, &msg, &error, &msg,
@ -62,12 +61,11 @@ error:
return fd; return fd;
} }
void release_device(struct otd *otd, int fd) void wlr_session_release_device(struct wlr_session *session, int fd)
{ {
int ret; int ret;
sd_bus_message *msg = NULL; sd_bus_message *msg = NULL;
sd_bus_error error = SD_BUS_ERROR_NULL; sd_bus_error error = SD_BUS_ERROR_NULL;
struct otd_session *s = &otd->session;
struct stat st; struct stat st;
if (fstat(fd, &st) < 0) { if (fstat(fd, &st) < 0) {
@ -75,9 +73,9 @@ void release_device(struct otd *otd, int fd)
return; return;
} }
ret = sd_bus_call_method(s->bus, ret = sd_bus_call_method(session->bus,
"org.freedesktop.login1", "org.freedesktop.login1",
s->path, session->path,
"org.freedesktop.login1.Session", "org.freedesktop.login1.Session",
"ReleaseDevice", "ReleaseDevice",
&error, &msg, &error, &msg,
@ -90,16 +88,15 @@ void release_device(struct otd *otd, int fd)
sd_bus_message_unref(msg); sd_bus_message_unref(msg);
} }
static bool session_activate(struct otd *otd) static bool session_activate(struct wlr_session *session)
{ {
int ret; int ret;
sd_bus_message *msg = NULL; sd_bus_message *msg = NULL;
sd_bus_error error = SD_BUS_ERROR_NULL; sd_bus_error error = SD_BUS_ERROR_NULL;
struct otd_session *s = &otd->session;
ret = sd_bus_call_method(s->bus, ret = sd_bus_call_method(session->bus,
"org.freedesktop.login1", "org.freedesktop.login1",
s->path, session->path,
"org.freedesktop.login1.Session", "org.freedesktop.login1.Session",
"Activate", "Activate",
&error, &msg, &error, &msg,
@ -113,16 +110,15 @@ static bool session_activate(struct otd *otd)
return ret >= 0; return ret >= 0;
} }
static bool take_control(struct otd *otd) static bool take_control(struct wlr_session *session)
{ {
int ret; int ret;
sd_bus_message *msg = NULL; sd_bus_message *msg = NULL;
sd_bus_error error = SD_BUS_ERROR_NULL; sd_bus_error error = SD_BUS_ERROR_NULL;
struct otd_session *s = &otd->session;
ret = sd_bus_call_method(s->bus, ret = sd_bus_call_method(session->bus,
"org.freedesktop.login1", "org.freedesktop.login1",
s->path, session->path,
"org.freedesktop.login1.Session", "org.freedesktop.login1.Session",
"TakeControl", "TakeControl",
&error, &msg, &error, &msg,
@ -136,16 +132,15 @@ static bool take_control(struct otd *otd)
return ret >= 0; return ret >= 0;
} }
static void release_control(struct otd *otd) static void release_control(struct wlr_session *session)
{ {
int ret; int ret;
sd_bus_message *msg = NULL; sd_bus_message *msg = NULL;
sd_bus_error error = SD_BUS_ERROR_NULL; sd_bus_error error = SD_BUS_ERROR_NULL;
struct otd_session *s = &otd->session;
ret = sd_bus_call_method(s->bus, ret = sd_bus_call_method(session->bus,
"org.freedesktop.login1", "org.freedesktop.login1",
s->path, session->path,
"org.freedesktop.login1.Session", "org.freedesktop.login1.Session",
"ReleaseControl", "ReleaseControl",
&error, &msg, &error, &msg,
@ -158,29 +153,27 @@ static void release_control(struct otd *otd)
sd_bus_message_unref(msg); sd_bus_message_unref(msg);
} }
void otd_close_session(struct otd *otd) void wlr_session_end(struct wlr_session *session)
{ {
release_device(otd, otd->fd); release_control(session);
release_control(otd);
sd_bus_unref(otd->session.bus); sd_bus_unref(session->bus);
free(otd->session.id); free(session->id);
free(otd->session.path); free(session->path);
free(otd->session.seat); free(session->seat);
} }
bool otd_new_session(struct otd *otd) bool wlr_session_start(struct wlr_session *session)
{ {
int ret; int ret;
struct otd_session *s = &otd->session;
ret = sd_pid_get_session(getpid(), &s->id); ret = sd_pid_get_session(getpid(), &session->id);
if (ret < 0) { if (ret < 0) {
fprintf(stderr, "Could not get session\n"); fprintf(stderr, "Could not get session\n");
goto error; goto error;
} }
ret = sd_session_get_seat(s->id, &s->seat); ret = sd_session_get_seat(session->id, &session->seat);
if (ret < 0) { if (ret < 0) {
fprintf(stderr, "Could not get seat\n"); fprintf(stderr, "Could not get seat\n");
goto error; goto error;
@ -189,26 +182,26 @@ bool otd_new_session(struct otd *otd)
// This could be done using asprintf, but I don't want to define _GNU_SOURCE // This could be done using asprintf, but I don't want to define _GNU_SOURCE
const char *fmt = "/org/freedesktop/login1/session/%s"; const char *fmt = "/org/freedesktop/login1/session/%s";
int len = snprintf(NULL, 0, fmt, s->id); int len = snprintf(NULL, 0, fmt, session->id);
s->path = malloc(len + 1); session->path = malloc(len + 1);
if (!s->path) if (!session->path)
goto error; goto error;
sprintf(s->path, fmt, s->id); sprintf(session->path, fmt, session->id);
ret = sd_bus_open_system(&s->bus); ret = sd_bus_open_system(&session->bus);
if (ret < 0) { if (ret < 0) {
fprintf(stderr, "Could not open bus\n"); fprintf(stderr, "Could not open bus\n");
goto error; goto error;
} }
if (!session_activate(otd)) { if (!session_activate(session)) {
fprintf(stderr, "Could not activate session\n"); fprintf(stderr, "Could not activate session\n");
goto error_bus; goto error_bus;
} }
if (!take_control(otd)) { if (!take_control(session)) {
fprintf(stderr, "Could not take control of session\n"); fprintf(stderr, "Could not take control of session\n");
goto error_bus; goto error_bus;
} }
@ -216,11 +209,11 @@ bool otd_new_session(struct otd *otd)
return true; return true;
error_bus: error_bus:
sd_bus_unref(s->bus); sd_bus_unref(session->bus);
error: error:
free(s->path); free(session->path);
free(s->id); free(session->id);
free(s->seat); free(session->seat);
return false; return false;
} }

79
backend/drm/udev.c
View file

@ -8,12 +8,15 @@
#include <xf86drm.h> #include <xf86drm.h>
#include <xf86drmMode.h> #include <xf86drmMode.h>
#include "backend/drm/otd.h" #include "backend/drm/backend.h"
#include "backend/drm/udev.h" #include "backend/drm/udev.h"
#include "backend/drm/session.h" #include "backend/drm/session.h"
#include "backend/drm/drm.h" #include "backend/drm/drm.h"
static bool device_is_kms(struct otd *otd, struct udev_device *dev) static bool device_is_kms(struct wlr_udev *udev,
struct wlr_session *session,
struct udev_device *dev,
int *fd_out)
{ {
const char *path = udev_device_get_devnode(dev); const char *path = udev_device_get_devnode(dev);
int fd; int fd;
@ -21,7 +24,7 @@ static bool device_is_kms(struct otd *otd, struct udev_device *dev)
if (!path) if (!path)
return false; return false;
fd = take_device(otd, path, &otd->paused); fd = wlr_session_take_device(session, path, NULL);
if (fd < 0) if (fd < 0)
return false; return false;
@ -33,13 +36,13 @@ static bool device_is_kms(struct otd *otd, struct udev_device *dev)
res->count_encoders <= 0) res->count_encoders <= 0)
goto out_res; goto out_res;
if (otd->fd >= 0) { if (*fd_out >= 0) {
release_device(otd, otd->fd); wlr_session_release_device(session, *fd_out);
free(otd->drm_path); free(udev->drm_path);
} }
otd->fd = fd; *fd_out = fd;
otd->drm_path = strdup(path); udev->drm_path = strdup(path);
drmModeFreeResources(res); drmModeFreeResources(res);
return true; return true;
@ -47,18 +50,17 @@ static bool device_is_kms(struct otd *otd, struct udev_device *dev)
out_res: out_res:
drmModeFreeResources(res); drmModeFreeResources(res);
out_fd: out_fd:
release_device(otd, fd); wlr_session_release_device(session, fd);
return false; return false;
} }
void otd_udev_find_gpu(struct otd *otd) int wlr_udev_find_gpu(struct wlr_udev *udev, struct wlr_session *session)
{ {
struct udev *udev = otd->udev; int fd = -1;
otd->fd = -1;
struct udev_enumerate *en = udev_enumerate_new(udev); struct udev_enumerate *en = udev_enumerate_new(udev->udev);
if (!en) if (!en)
return; return -1;
udev_enumerate_add_match_subsystem(en, "drm"); udev_enumerate_add_match_subsystem(en, "drm");
udev_enumerate_add_match_sysname(en, "card[0-9]*"); udev_enumerate_add_match_sysname(en, "card[0-9]*");
@ -69,14 +71,14 @@ void otd_udev_find_gpu(struct otd *otd)
bool is_boot_vga = false; bool is_boot_vga = false;
const char *path = udev_list_entry_get_name(entry); const char *path = udev_list_entry_get_name(entry);
struct udev_device *dev = udev_device_new_from_syspath(udev, path); struct udev_device *dev = udev_device_new_from_syspath(udev->udev, path);
if (!dev) if (!dev)
continue; continue;
const char *seat = udev_device_get_property_value(dev, "ID_SEAT"); const char *seat = udev_device_get_property_value(dev, "ID_SEAT");
if (!seat) if (!seat)
seat = "seat0"; seat = "seat0";
if (strcmp(otd->session.seat, seat) != 0) { if (strcmp(session->seat, seat) != 0) {
udev_device_unref(dev); udev_device_unref(dev);
continue; continue;
} }
@ -92,12 +94,12 @@ void otd_udev_find_gpu(struct otd *otd)
udev_device_unref(pci); udev_device_unref(pci);
} }
if (!is_boot_vga && otd->fd >= 0) { if (!is_boot_vga && fd >= 0) {
udev_device_unref(dev); udev_device_unref(dev);
continue; continue;
} }
if (!device_is_kms(otd, dev)) { if (!device_is_kms(udev, session, dev, &fd)) {
udev_device_unref(dev); udev_device_unref(dev);
continue; continue;
} }
@ -108,52 +110,59 @@ void otd_udev_find_gpu(struct otd *otd)
} }
udev_enumerate_unref(en); udev_enumerate_unref(en);
return fd;
} }
bool otd_udev_start(struct otd *otd) bool wlr_udev_init(struct wlr_udev *udev)
{ {
otd->udev = udev_new(); udev->udev = udev_new();
if (!otd->udev) if (!udev->udev)
return false; return false;
otd->mon = udev_monitor_new_from_netlink(otd->udev, "udev"); udev->mon = udev_monitor_new_from_netlink(udev->udev, "udev");
if (!otd->mon) { if (!udev->mon) {
udev_unref(otd->udev); udev_unref(udev->udev);
return false; return false;
} }
udev_monitor_filter_add_match_subsystem_devtype(otd->mon, "drm", NULL); udev_monitor_filter_add_match_subsystem_devtype(udev->mon, "drm", NULL);
udev_monitor_enable_receiving(otd->mon); udev_monitor_enable_receiving(udev->mon);
otd->udev_fd = udev_monitor_get_fd(otd->mon); udev->mon_fd = udev_monitor_get_fd(udev->mon);
udev->drm_path = NULL;
return true; return true;
} }
void otd_udev_finish(struct otd *otd) void wlr_udev_free(struct wlr_udev *udev)
{ {
if (!otd) if (!udev)
return; return;
udev_monitor_unref(otd->mon); udev_monitor_unref(udev->mon);
udev_unref(otd->udev); udev_unref(udev->udev);
free(udev->drm_path);
} }
void otd_udev_event(struct otd *otd) void wlr_udev_event(struct wlr_drm_backend *backend)
{ {
struct udev_device *dev = udev_monitor_receive_device(otd->mon); struct wlr_udev *udev = &backend->udev;
struct udev_device *dev = udev_monitor_receive_device(udev->mon);
if (!dev) if (!dev)
return; return;
const char *path = udev_device_get_devnode(dev); const char *path = udev_device_get_devnode(dev);
if (!path || strcmp(path, otd->drm_path) != 0) if (!path || strcmp(path, udev->drm_path) != 0)
goto out; goto out;
const char *action = udev_device_get_action(dev); const char *action = udev_device_get_action(dev);
if (!action || strcmp(action, "change") != 0) if (!action || strcmp(action, "change") != 0)
goto out; goto out;
scan_connectors(otd); wlr_drm_scan_connectors(backend);
out: out:
udev_device_unref(dev); udev_device_unref(dev);

37
include/backend/drm/backend.h Normal file
View file

@ -0,0 +1,37 @@
#ifndef DRM_BACKEND_H
#define DRM_BACKEND_H
#include <stdbool.h>
#include <stddef.h>
#include <EGL/egl.h>
#include <gbm.h>
#include <libudev.h>
#include "session.h"
#include "udev.h"
#include "event.h"
#include "drm.h"
struct wlr_drm_backend {
int fd;
bool paused;
// Priority Queue (Max-heap)
size_t event_cap;
size_t event_len;
struct wlr_drm_event *events;
size_t display_len;
struct wlr_drm_display *displays;
uint32_t taken_crtcs;
struct wlr_drm_renderer renderer;
struct wlr_session session;
struct wlr_udev udev;
};
struct wlr_drm_backend *wlr_drm_backend_init(void);
void wlr_drm_backend_free(struct wlr_drm_backend *backend);
#endif

52
include/backend/drm/drm.h
View file

@ -7,17 +7,35 @@
#include <EGL/egl.h> #include <EGL/egl.h>
#include <gbm.h> #include <gbm.h>
enum otd_display_state { struct wlr_drm_renderer {
OTD_DISP_INVALID, int fd;
OTD_DISP_DISCONNECTED,
OTD_DISP_NEEDS_MODESET, // Currently here so that rendering has access to the event queue.
OTD_DISP_CONNECTED, // Ideally this is will be removed later once the way events are
// handled is changed.
struct wlr_drm_backend *backend;
struct gbm_device *gbm;
struct {
EGLDisplay disp;
EGLConfig conf;
EGLContext context;
} egl;
}; };
struct otd_display { bool wlr_drm_renderer_init(struct wlr_drm_renderer *renderer,
struct otd *otd; struct wlr_drm_backend *backend, int fd);
void wlr_drm_renderer_free(struct wlr_drm_renderer *renderer);
enum otd_display_state state; enum wlr_drm_display_state {
DRM_DISP_INVALID,
DRM_DISP_DISCONNECTED,
DRM_DISP_NEEDS_MODESET,
DRM_DISP_CONNECTED,
};
struct wlr_drm_display {
enum wlr_drm_display_state state;
uint32_t connector; uint32_t connector;
char name[16]; char name[16];
@ -31,24 +49,22 @@ struct otd_display {
uint32_t crtc; uint32_t crtc;
drmModeCrtc *old_crtc; drmModeCrtc *old_crtc;
struct wlr_drm_renderer *renderer;
struct gbm_surface *gbm; struct gbm_surface *gbm;
EGLSurface *egl; EGLSurface *egl;
uint32_t fb_id;
bool pageflip_pending; bool pageflip_pending;
bool cleanup; bool cleanup;
}; };
bool init_renderer(struct otd *otd); bool wlr_drm_display_modeset(struct wlr_drm_backend *backend,
void destroy_renderer(struct otd *otd); struct wlr_drm_display *disp, const char *str);
void wlr_drm_display_free(struct wlr_drm_display *disp);
void scan_connectors(struct otd *otd); void wlr_drm_display_begin(struct wlr_drm_display *disp);
bool modeset_str(struct otd *otd, struct otd_display *disp, const char *str); void wlr_drm_display_end(struct wlr_drm_display *disp);
void destroy_display_renderer(struct otd *otd, struct otd_display *disp);
void get_drm_event(struct otd *otd); void wlr_drm_scan_connectors(struct wlr_drm_backend *backend);
void wlr_drm_event(int fd);
void rendering_begin(struct otd_display *disp);
void rendering_end(struct otd_display *disp);
#endif #endif

24
include/backend/drm/event.h
View file

@ -2,20 +2,24 @@
#define EVENT_H #define EVENT_H
#include <stdbool.h> #include <stdbool.h>
#include "drm.h"
enum otd_event_type { enum wlr_drm_event_type {
OTD_EV_NONE, DRM_EV_NONE,
OTD_EV_RENDER, DRM_EV_RENDER,
OTD_EV_DISPLAY_REM, DRM_EV_DISPLAY_REM,
OTD_EV_DISPLAY_ADD, DRM_EV_DISPLAY_ADD,
}; };
struct otd_event { struct wlr_drm_event {
enum otd_event_type type; enum wlr_drm_event_type type;
struct otd_display *display; struct wlr_drm_display *display;
}; };
bool otd_get_event(struct otd *otd, struct otd_event *restrict ret); struct wlr_drm_backend;
bool event_add(struct otd *otd, struct otd_display *disp, enum otd_event_type type); bool wlr_drm_get_event(struct wlr_drm_backend *backend,
struct wlr_drm_event *restrict ret);
bool wlr_drm_add_event(struct wlr_drm_backend *backend,
struct wlr_drm_display *disp, enum wlr_drm_event_type type);
#endif #endif

44
include/backend/drm/otd.h
View file

@ -1,44 +0,0 @@
#ifndef LIBOTD_H
#define LIBOTD_H
#include <stdbool.h>
#include <stddef.h>
#include <EGL/egl.h>
#include <gbm.h>
#include <libudev.h>
#include "session.h"
struct otd {
int fd;
bool paused;
// Priority Queue (Max-heap)
size_t event_cap;
size_t event_len;
struct otd_event *events;
size_t display_len;
struct otd_display *displays;
uint32_t taken_crtcs;
struct gbm_device *gbm;
struct {
EGLDisplay disp;
EGLConfig conf;
EGLContext context;
} egl;
struct otd_session session;
struct udev *udev;
struct udev_monitor *mon;
int udev_fd;
char *drm_path;
};
struct otd *otd_start(void);
void otd_finish(struct otd *otd);
#endif

19
include/backend/drm/session.h
View file

@ -4,22 +4,21 @@
#include <systemd/sd-bus.h> #include <systemd/sd-bus.h>
#include <stdbool.h> #include <stdbool.h>
struct otd_session { struct wlr_session {
sd_bus *bus;
char *id; char *id;
char *path; char *path;
char *seat; char *seat;
sd_bus *bus;
}; };
struct otd; bool wlr_session_start(struct wlr_session *session);
bool otd_new_session(struct otd *otd); void wlr_session_end(struct wlr_session *session);
void otd_close_session(struct otd *otd);
int take_device(struct otd *restrict otd, int wlr_session_take_device(struct wlr_session *restrict session,
const char *restrict path, const char *restrict path,
bool *restrict paused_out); bool *restrict paused_out);
void release_device(struct otd *otd, int fd); void wlr_session_release_device(struct wlr_session *session, int fd);
#endif #endif

21
include/backend/drm/udev.h
View file

@ -1,9 +1,22 @@
#ifndef UDEV_H #ifndef UDEV_H
#define UDEV_H #define UDEV_H
bool otd_udev_start(struct otd *otd); #include <libudev.h>
void otd_udev_finish(struct otd *otd);
void otd_udev_find_gpu(struct otd *otd); #include "backend/drm/session.h"
void otd_udev_event(struct otd *otd);
struct wlr_udev {
struct udev *udev;
struct udev_monitor *mon;
int mon_fd;
char *drm_path;
};
bool wlr_udev_init(struct wlr_udev *udev);
void wlr_udev_free(struct wlr_udev *udev);
int wlr_udev_find_gpu(struct wlr_udev *udev, struct wlr_session *session);
struct wlr_drm_backend;
void wlr_udev_event(struct wlr_drm_backend *backend);
#endif #endif