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Changed modesetting interface.

This commit is contained in:
Scott Anderson 2017-05-03 22:40:19 +12:00
parent d196a79b6c
commit ef9768858e
6 changed files with 218 additions and 225 deletions
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2
backend/drm/backend.c
View File

@ -90,7 +90,7 @@ error_backend:
static void free_output(void *item)
{
struct wlr_drm_output *out = item;
wlr_drm_output_free(out, true);
wlr_drm_output_cleanup(out, true);
free(out);
}

395
backend/drm/drm.c
View File

@ -37,29 +37,6 @@ static const char *conn_name[] = {
[DRM_MODE_CONNECTOR_DSI] = "DSI",
};
static void page_flip_handler(int fd, unsigned seq, unsigned tv_sec, unsigned tv_usec,
void *user) {
struct wlr_drm_output *out = user;
struct wlr_drm_backend *backend = wl_container_of(out->renderer, backend, renderer);
out->pageflip_pending = true;
if (!out->cleanup) {
wl_signal_emit(&backend->signals.output_render, out);
}
}
int wlr_drm_event(int fd, uint32_t mask, void *data) {
drmEventContext event = {
.version = DRM_EVENT_CONTEXT_VERSION,
.page_flip_handler = page_flip_handler,
};
drmHandleEvent(fd, &event);
return 1;
}
bool wlr_drm_renderer_init(struct wlr_drm_renderer *renderer, int fd) {
renderer->gbm = gbm_create_device(fd);
@ -86,6 +63,97 @@ void wlr_drm_renderer_free(struct wlr_drm_renderer *renderer) {
gbm_device_destroy(renderer->gbm);
}
static void free_fb(struct gbm_bo *bo, void *data) {
uint32_t *id = data;
if (id && *id) {
drmModeRmFB(gbm_bo_get_fd(bo), *id);
}
free(id);
}
static uint32_t get_fb_for_bo(int fd, struct gbm_bo *bo) {
uint32_t *id = gbm_bo_get_user_data(bo);
if (id) {
return *id;
}
id = calloc(1, sizeof *id);
if (!id) {
wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
return 0;
}
drmModeAddFB(fd, gbm_bo_get_width(bo), gbm_bo_get_height(bo), 24, 32,
gbm_bo_get_stride(bo), gbm_bo_get_handle(bo).u32, id);
gbm_bo_set_user_data(bo, id, free_fb);
return *id;
}
void wlr_drm_output_begin(struct wlr_drm_output *out) {
struct wlr_drm_renderer *renderer = out->renderer;
eglMakeCurrent(renderer->egl.display, out->egl, out->egl, renderer->egl.context);
}
void wlr_drm_output_end(struct wlr_drm_output *out) {
struct wlr_drm_renderer *renderer = out->renderer;
eglSwapBuffers(renderer->egl.display, out->egl);
struct gbm_bo *bo = gbm_surface_lock_front_buffer(out->gbm);
uint32_t fb_id = get_fb_for_bo(renderer->fd, bo);
drmModePageFlip(renderer->fd, out->crtc, fb_id, DRM_MODE_PAGE_FLIP_EVENT, out);
gbm_surface_release_buffer(out->gbm, bo);
out->pageflip_pending = false;
}
static bool display_init_renderer(struct wlr_drm_renderer *renderer,
struct wlr_drm_output *out) {
out->renderer = renderer;
out->gbm = gbm_surface_create(renderer->gbm, out->width, out->height,
GBM_FORMAT_XRGB8888, GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);
if (!out->gbm) {
wlr_log(L_ERROR, "Failed to create GBM surface for %s: %s", out->name,
strerror(errno));
return false;
}
out->egl = wlr_egl_create_surface(&renderer->egl, out->gbm);
if (out->egl == EGL_NO_SURFACE) {
wlr_log(L_ERROR, "Failed to create EGL surface for %s", out->name);
return false;
}
// Render black frame
eglMakeCurrent(renderer->egl.display, out->egl, out->egl, renderer->egl.context);
glViewport(0, 0, out->width, out->height);
glClearColor(0.0, 0.0, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
eglSwapBuffers(renderer->egl.display, out->egl);
struct gbm_bo *bo = gbm_surface_lock_front_buffer(out->gbm);
uint32_t fb_id = get_fb_for_bo(renderer->fd, bo);
drmModeSetCrtc(renderer->fd, out->crtc, fb_id, 0, 0,
&out->connector, 1, &out->active_mode->mode);
drmModePageFlip(renderer->fd, out->crtc, fb_id, DRM_MODE_PAGE_FLIP_EVENT, out);
gbm_surface_release_buffer(out->gbm, bo);
return true;
}
static int find_id(const void *item, const void *cmp_to) {
const struct wlr_drm_output *out = item;
const uint32_t *id = cmp_to;
@ -142,6 +210,30 @@ void wlr_drm_scan_connectors(struct wlr_drm_backend *backend) {
if (out->state == DRM_OUTPUT_DISCONNECTED &&
conn->connection == DRM_MODE_CONNECTED) {
wlr_log(L_INFO, "'%s' connected", out->name);
out->modes = malloc(sizeof(*out->modes) * conn->count_modes);
if (!out->modes) {
wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
goto error;
}
wlr_log(L_INFO, "Detected modes:");
out->num_modes = conn->count_modes;
for (int i = 0; i < conn->count_modes; ++i) {
drmModeModeInfo *mode = &conn->modes[i];
out->modes[i].width = mode->hdisplay;
out->modes[i].height = mode->vdisplay;
// TODO: Calculate more accurate refresh rate
out->modes[i].rate = mode->vrefresh;
out->modes[i].mode = *mode;
wlr_log(L_INFO, " %"PRIu16"@%"PRIu16"@%"PRIu32,
mode->hdisplay, mode->vdisplay,
mode->vrefresh);
}
out->state = DRM_OUTPUT_NEEDS_MODESET;
wlr_log(L_INFO, "Sending modesetting signal for '%s'", out->name);
wl_signal_emit(&backend->signals.output_add, out);
@ -149,138 +241,32 @@ void wlr_drm_scan_connectors(struct wlr_drm_backend *backend) {
} else if (out->state == DRM_OUTPUT_CONNECTED &&
conn->connection != DRM_MODE_CONNECTED) {
out->state = DRM_OUTPUT_DISCONNECTED;
wlr_drm_output_free(out, false);
wlr_drm_output_cleanup(out, false);
wlr_log(L_INFO, "Sending destruction signal for '%s'", out->name);
wl_signal_emit(&backend->signals.output_rem, out);
}
error:
drmModeFreeConnector(conn);
}
drmModeFreeResources(res);
}
static void free_fb(struct gbm_bo *bo, void *data) {
uint32_t *id = data;
if (id && *id) {
drmModeRmFB(gbm_bo_get_fd(bo), *id);
}
free(id);
}
static uint32_t get_fb_for_bo(int fd, struct gbm_bo *bo) {
uint32_t *id = gbm_bo_get_user_data(bo);
if (id) {
return *id;
}
id = calloc(1, sizeof *id);
if (!id) {
wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
return 0;
}
drmModeAddFB(fd, gbm_bo_get_width(bo), gbm_bo_get_height(bo), 24, 32,
gbm_bo_get_stride(bo), gbm_bo_get_handle(bo).u32, id);
gbm_bo_set_user_data(bo, id, free_fb);
return *id;
}
static bool display_init_renderer(struct wlr_drm_renderer *renderer,
struct wlr_drm_output *out) {
out->renderer = renderer;
out->gbm = gbm_surface_create(renderer->gbm, out->width, out->height,
GBM_FORMAT_XRGB8888, GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);
if (!out->gbm) {
wlr_log(L_ERROR, "Failed to create GBM surface for %s: %s", out->name,
strerror(errno));
return false;
}
out->egl = wlr_egl_create_surface(&renderer->egl, out->gbm);
if (out->egl == EGL_NO_SURFACE) {
wlr_log(L_ERROR, "Failed to create EGL surface for %s", out->name);
return false;
}
// Render black frame
eglMakeCurrent(renderer->egl.display, out->egl, out->egl, renderer->egl.context);
glViewport(0, 0, out->width, out->height);
glClearColor(0.0, 0.0, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
eglSwapBuffers(renderer->egl.display, out->egl);
struct gbm_bo *bo = gbm_surface_lock_front_buffer(out->gbm);
uint32_t fb_id = get_fb_for_bo(renderer->fd, bo);
drmModeSetCrtc(renderer->fd, out->crtc, fb_id, 0, 0,
&out->connector, 1, out->active_mode);
drmModePageFlip(renderer->fd, out->crtc, fb_id, DRM_MODE_PAGE_FLIP_EVENT, out);
gbm_surface_release_buffer(out->gbm, bo);
return true;
}
static drmModeModeInfo *select_mode(size_t num_modes, drmModeModeInfo modes[static num_modes],
drmModeCrtc *old_crtc, const char *str) {
if (strcmp(str, "preferred") == 0) {
return &modes[0];
}
if (strcmp(str, "current") == 0) {
if (!old_crtc) {
wlr_log(L_ERROR, "Display does not have currently configured mode");
struct wlr_drm_mode *wlr_drm_output_get_modes(struct wlr_drm_output *out, size_t *count) {
if (out->state == DRM_OUTPUT_DISCONNECTED) {
*count = 0;
return NULL;
}
for (size_t i = 0; i < num_modes; ++i) {
if (memcmp(&modes[i], &old_crtc->mode, sizeof modes[0]) == 0) {
return &modes[i];
}
*count = out->num_modes;
return out->modes;
}
// We should never get here
assert(0);
}
unsigned width = 0;
unsigned height = 0;
unsigned rate = 0;
int ret;
if ((ret = sscanf(str, "%ux%u@%u", &width, &height, &rate)) != 2 && ret != 3) {
wlr_log(L_ERROR, "Invalid modesetting string '%s'", str);
return NULL;
}
for (size_t i = 0; i < num_modes; ++i) {
if (modes[i].hdisplay == width && modes[i].vdisplay == height &&
(!rate || modes[i].vrefresh == rate)) {
return &modes[i];
}
}
wlr_log(L_ERROR, "Unable to find mode %ux%u@%u", width, height, rate);
return NULL;
}
bool wlr_drm_output_modeset(struct wlr_drm_output *out, const char *str) {
bool wlr_drm_output_modeset(struct wlr_drm_output *out, struct wlr_drm_mode *mode) {
struct wlr_drm_backend *backend = wl_container_of(out->renderer, backend, renderer);
wlr_log(L_INFO, "Modesetting %s with '%s'", out->name, str);
wlr_log(L_INFO, "Modesetting '%s' with '%ux%u@%u'", out->name, mode->width,
mode->height, mode->rate);
drmModeConnector *conn = drmModeGetConnector(backend->fd, out->connector);
if (!conn) {
@ -293,34 +279,12 @@ bool wlr_drm_output_modeset(struct wlr_drm_output *out, const char *str) {
goto error;
}
out->num_modes = conn->count_modes;
out->modes = malloc(sizeof *out->modes * out->num_modes);
if (!out->modes) {
wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
goto error;
}
memcpy(out->modes, conn->modes, sizeof *out->modes * out->num_modes);
wlr_log(L_INFO, "Detected modes:");
for (size_t i = 0; i < out->num_modes; ++i) {
wlr_log(L_INFO, " %"PRIu16"@%"PRIu16"@%"PRIu32,
out->modes[i].hdisplay, out->modes[i].vdisplay,
out->modes[i].vrefresh);
}
drmModeEncoder *curr_enc = drmModeGetEncoder(backend->fd, conn->encoder_id);
if (curr_enc) {
out->old_crtc = drmModeGetCrtc(backend->fd, curr_enc->crtc_id);
free(curr_enc);
}
out->active_mode = select_mode(out->num_modes, out->modes,
out->old_crtc, str);
if (!out->active_mode) {
wlr_log(L_ERROR, "Failed to configure %s", out->name);
goto error;
}
drmModeRes *res = drmModeGetResources(backend->fd);
if (!res) {
wlr_log(L_ERROR, "Failed to get DRM resources");
@ -358,9 +322,9 @@ bool wlr_drm_output_modeset(struct wlr_drm_output *out, const char *str) {
}
out->state = DRM_OUTPUT_CONNECTED;
out->width = out->active_mode->hdisplay;
out->height = out->active_mode->vdisplay;
out->active_mode = mode;
out->width = mode->width;
out->height = mode->height;
if (!display_init_renderer(&backend->renderer, out)) {
wlr_log(L_ERROR, "Failed to initalise renderer for %s", out->name);
@ -369,10 +333,6 @@ bool wlr_drm_output_modeset(struct wlr_drm_output *out, const char *str) {
drmModeFreeConnector(conn);
wlr_log(L_INFO, "Configuring %s with mode %"PRIu16"x%"PRIu16"@%"PRIu32"",
out->name, out->active_mode->hdisplay, out->active_mode->vdisplay,
out->active_mode->vrefresh);
return true;
error:
@ -385,58 +345,79 @@ error:
return false;
}
void wlr_drm_output_free(struct wlr_drm_output *out, bool restore) {
if (!out || out->state != DRM_OUTPUT_CONNECTED) {
return;
static void page_flip_handler(int fd, unsigned seq, unsigned tv_sec, unsigned tv_usec,
void *user) {
struct wlr_drm_output *out = user;
struct wlr_drm_backend *backend = wl_container_of(out->renderer, backend, renderer);
out->pageflip_pending = true;
if (!out->cleanup) {
wl_signal_emit(&backend->signals.output_render, out);
}
}
struct wlr_drm_renderer *renderer = out->renderer;
eglDestroySurface(renderer->egl.display, out->egl);
gbm_surface_destroy(out->gbm);
free(out->modes);
out->state = DRM_OUTPUT_DISCONNECTED;
if (!restore) {
return;
}
drmModeCrtc *crtc = out->old_crtc;
if (crtc) {
// Wait for exising page flips to finish
int wlr_drm_event(int fd, uint32_t mask, void *data) {
drmEventContext event = {
.version = DRM_EVENT_CONTEXT_VERSION,
.page_flip_handler = page_flip_handler,
};
out->cleanup = true;
while (out->pageflip_pending)
drmHandleEvent(renderer->fd, &event);
drmHandleEvent(fd, &event);
drmModeSetCrtc(renderer->fd, crtc->crtc_id, crtc->buffer_id,
crtc->x, crtc->y, &out->connector,
1, &crtc->mode);
return 1;
}
static void restore_output(struct wlr_drm_output *out, int fd) {
drmModeCrtc *crtc = out->old_crtc;
if (!crtc) {
return;
}
// Wait for exising page flips to finish
out->cleanup = true;
while (out->pageflip_pending) {
wlr_drm_event(fd, 0, NULL);
}
drmModeSetCrtc(fd, crtc->crtc_id, crtc->buffer_id, crtc->x, crtc->y,
&out->connector, 1, &crtc->mode);
drmModeFreeCrtc(crtc);
}
void wlr_drm_output_cleanup(struct wlr_drm_output *out, bool restore) {
if (!out) {
return;
}
void wlr_drm_output_begin(struct wlr_drm_output *out) {
struct wlr_drm_renderer *renderer = out->renderer;
eglMakeCurrent(renderer->egl.display, out->egl, out->egl, renderer->egl.context);
switch (out->state) {
case DRM_OUTPUT_CONNECTED:
eglDestroySurface(renderer->egl.display, out->egl);
gbm_surface_destroy(out->gbm);
out->egl = EGL_NO_SURFACE;
out->gbm = NULL;
/* Fallthrough */
case DRM_OUTPUT_NEEDS_MODESET:
free(out->modes);
out->num_modes = 0;
out->modes = NULL;
out->active_mode = NULL;
out->width = 0;
out->height = 0;
if (restore) {
restore_output(out, renderer->fd);
}
void wlr_drm_output_end(struct wlr_drm_output *out) {
struct wlr_drm_renderer *renderer = out->renderer;
eglSwapBuffers(renderer->egl.display, out->egl);
out->state = DRM_MODE_DISCONNECTED;
break;
struct gbm_bo *bo = gbm_surface_lock_front_buffer(out->gbm);
uint32_t fb_id = get_fb_for_bo(renderer->fd, bo);
drmModePageFlip(renderer->fd, out->crtc, fb_id, DRM_MODE_PAGE_FLIP_EVENT, out);
gbm_surface_release_buffer(out->gbm, bo);
out->pageflip_pending = false;
case DRM_OUTPUT_DISCONNECTED:
break;
}
}

4
example/CMakeLists.txt
View File

@ -1,3 +1,7 @@
include_directories(
${DRM_INCLUDE_DIRS}
)
add_executable(example
main.c
)

7
example/example-drm.c
View File

@ -23,8 +23,10 @@ void output_add(struct wl_listener *listener, void *data)
{
struct wlr_drm_output *out = data;
fprintf(stderr, "Output added\n");
wlr_drm_output_modeset(out, "preferred");
size_t num_modes;
struct wlr_drm_mode *modes = wlr_drm_output_get_modes(out, &num_modes);
wlr_drm_output_modeset(out, &modes[0]);
}
void output_rem(struct wl_listener *listener, void *data)
@ -115,4 +117,5 @@ int main()
wl_event_source_remove(timer);
wlr_drm_backend_free(wlr);
wl_display_destroy(display);
}

11
include/backend/drm/drm.h
View File

@ -25,7 +25,6 @@ bool wlr_drm_renderer_init(struct wlr_drm_renderer *renderer, int fd);
void wlr_drm_renderer_free(struct wlr_drm_renderer *renderer);
enum wlr_drm_output_state {
DRM_OUTPUT_INVALID,
DRM_OUTPUT_DISCONNECTED,
DRM_OUTPUT_NEEDS_MODESET,
DRM_OUTPUT_CONNECTED,
@ -37,8 +36,8 @@ struct wlr_drm_output {
char name[16];
size_t num_modes;
drmModeModeInfo *modes;
drmModeModeInfo *active_mode;
struct wlr_drm_mode *modes;
struct wlr_drm_mode *active_mode;
uint32_t width;
uint32_t height;
@ -54,11 +53,7 @@ struct wlr_drm_output {
bool cleanup;
};
bool wlr_drm_output_modeset(struct wlr_drm_output *out, const char *str);
void wlr_drm_output_free(struct wlr_drm_output *out, bool restore);
void wlr_drm_output_begin(struct wlr_drm_output *out);
void wlr_drm_output_end(struct wlr_drm_output *out);
void wlr_drm_output_cleanup(struct wlr_drm_output *out, bool restore);
void wlr_drm_scan_connectors(struct wlr_drm_backend *backend);
int wlr_drm_event(int fd, uint32_t mask, void *data);

12
include/wlr/backend/drm.h
View File

@ -3,16 +3,26 @@
#include <wayland-server.h>
#include <wlr/session.h>
#include <xf86drmMode.h> // drmModeModeInfo
struct wlr_drm_backend;
struct wlr_drm_output;
struct wlr_drm_mode {
uint16_t width;
uint16_t height;
uint32_t rate;
drmModeModeInfo mode;
};
struct wlr_drm_backend *wlr_drm_backend_init(struct wl_display *display,
struct wlr_session *session, struct wl_listener *add, struct wl_listener *rem,
struct wl_listener *render);
void wlr_drm_backend_free(struct wlr_drm_backend *backend);
bool wlr_drm_output_modeset(struct wlr_drm_output *out, const char *str);
struct wlr_drm_mode *wlr_drm_output_get_modes(struct wlr_drm_output *out, size_t *count);
bool wlr_drm_output_modeset(struct wlr_drm_output *out, struct wlr_drm_mode *mode);
void wlr_drm_output_begin(struct wlr_drm_output *out);
void wlr_drm_output_end(struct wlr_drm_output *out);