wlroots/backend/drm/drm.c

1030 lines
28 KiB
C

#include <assert.h>
#include <drm_mode.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <errno.h>
#include <gbm.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <wayland-server.h>
#include <wayland-util.h>
#include <wlr/backend/interface.h>
#include <wlr/interfaces/wlr_output.h>
#include <wlr/render.h>
#include <wlr/render/gles2.h>
#include <wlr/render/matrix.h>
#include <wlr/util/log.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include "backend/drm/drm.h"
#include "backend/drm/iface.h"
#include "backend/drm/util.h"
#include "util/signal.h"
bool wlr_drm_check_features(struct wlr_drm_backend *drm) {
if (drmSetClientCap(drm->fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1)) {
wlr_log(L_ERROR, "DRM universal planes unsupported");
return false;
}
if (getenv("WLR_DRM_NO_ATOMIC")) {
wlr_log(L_DEBUG, "WLR_DRM_NO_ATOMIC set, forcing legacy DRM interface");
drm->iface = &legacy_iface;
} else if (drmSetClientCap(drm->fd, DRM_CLIENT_CAP_ATOMIC, 1)) {
wlr_log(L_DEBUG, "Atomic modesetting unsupported, using legacy DRM interface");
drm->iface = &legacy_iface;
} else {
wlr_log(L_DEBUG, "Using atomic DRM interface");
drm->iface = &atomic_iface;
}
return true;
}
static int cmp_plane(const void *arg1, const void *arg2) {
const struct wlr_drm_plane *a = arg1;
const struct wlr_drm_plane *b = arg2;
return (int)a->type - (int)b->type;
}
static bool init_planes(struct wlr_drm_backend *drm) {
drmModePlaneRes *plane_res = drmModeGetPlaneResources(drm->fd);
if (!plane_res) {
wlr_log_errno(L_ERROR, "Failed to get DRM plane resources");
return false;
}
wlr_log(L_INFO, "Found %"PRIu32" DRM planes", plane_res->count_planes);
if (plane_res->count_planes == 0) {
drmModeFreePlaneResources(plane_res);
return true;
}
drm->num_planes = plane_res->count_planes;
drm->planes = calloc(drm->num_planes, sizeof(*drm->planes));
if (!drm->planes) {
wlr_log_errno(L_ERROR, "Allocation failed");
goto error_res;
}
for (size_t i = 0; i < drm->num_planes; ++i) {
struct wlr_drm_plane *p = &drm->planes[i];
drmModePlane *plane = drmModeGetPlane(drm->fd, plane_res->planes[i]);
if (!plane) {
wlr_log_errno(L_ERROR, "Failed to get DRM plane");
goto error_planes;
}
p->id = plane->plane_id;
p->possible_crtcs = plane->possible_crtcs;
uint64_t type;
if (!wlr_drm_get_plane_props(drm->fd, p->id, &p->props) ||
!wlr_drm_get_prop(drm->fd, p->id, p->props.type, &type)) {
drmModeFreePlane(plane);
goto error_planes;
}
p->type = type;
drm->num_type_planes[type]++;
drmModeFreePlane(plane);
}
wlr_log(L_INFO, "(%zu overlay, %zu primary, %zu cursor)",
drm->num_overlay_planes,
drm->num_primary_planes,
drm->num_cursor_planes);
qsort(drm->planes, drm->num_planes, sizeof(*drm->planes), cmp_plane);
drm->overlay_planes = drm->planes;
drm->primary_planes = drm->overlay_planes
+ drm->num_overlay_planes;
drm->cursor_planes = drm->primary_planes
+ drm->num_primary_planes;
drmModeFreePlaneResources(plane_res);
return true;
error_planes:
free(drm->planes);
error_res:
drmModeFreePlaneResources(plane_res);
return false;
}
bool wlr_drm_resources_init(struct wlr_drm_backend *drm) {
drmModeRes *res = drmModeGetResources(drm->fd);
if (!res) {
wlr_log_errno(L_ERROR, "Failed to get DRM resources");
return false;
}
wlr_log(L_INFO, "Found %d DRM CRTCs", res->count_crtcs);
drm->num_crtcs = res->count_crtcs;
drm->crtcs = calloc(drm->num_crtcs, sizeof(drm->crtcs[0]));
if (!drm->crtcs) {
wlr_log_errno(L_ERROR, "Allocation failed");
goto error_res;
}
for (size_t i = 0; i < drm->num_crtcs; ++i) {
struct wlr_drm_crtc *crtc = &drm->crtcs[i];
crtc->id = res->crtcs[i];
crtc->legacy_crtc = drmModeGetCrtc(drm->fd, crtc->id);
wlr_drm_get_crtc_props(drm->fd, crtc->id, &crtc->props);
}
if (!init_planes(drm)) {
goto error_crtcs;
}
drmModeFreeResources(res);
return true;
error_crtcs:
free(drm->crtcs);
error_res:
drmModeFreeResources(res);
return false;
}
void wlr_drm_resources_free(struct wlr_drm_backend *drm) {
if (!drm) {
return;
}
for (size_t i = 0; i < drm->num_crtcs; ++i) {
struct wlr_drm_crtc *crtc = &drm->crtcs[i];
drmModeAtomicFree(crtc->atomic);
drmModeFreeCrtc(crtc->legacy_crtc);
if (crtc->mode_id) {
drmModeDestroyPropertyBlob(drm->fd, crtc->mode_id);
}
if (crtc->gamma_lut) {
drmModeDestroyPropertyBlob(drm->fd, crtc->gamma_lut);
}
}
for (size_t i = 0; i < drm->num_planes; ++i) {
struct wlr_drm_plane *plane = &drm->planes[i];
if (plane->cursor_bo) {
gbm_bo_destroy(plane->cursor_bo);
}
if (plane->wlr_tex) {
wlr_texture_destroy(plane->wlr_tex);
}
}
free(drm->crtcs);
free(drm->planes);
}
static bool wlr_drm_connector_make_current(struct wlr_output *output,
int *buffer_age) {
struct wlr_drm_connector *conn = (struct wlr_drm_connector *)output;
return wlr_drm_surface_make_current(&conn->crtc->primary->surf, buffer_age);
}
static bool wlr_drm_connector_swap_buffers(struct wlr_output *output,
pixman_region32_t *damage) {
struct wlr_drm_connector *conn = (struct wlr_drm_connector *)output;
struct wlr_drm_backend *drm = (struct wlr_drm_backend *)output->backend;
if (!drm->session->active) {
return false;
}
struct wlr_drm_crtc *crtc = conn->crtc;
if (!crtc) {
return false;
}
struct wlr_drm_plane *plane = crtc->primary;
struct gbm_bo *bo = wlr_drm_surface_swap_buffers(&plane->surf, damage);
if (drm->parent) {
bo = wlr_drm_surface_mgpu_copy(&plane->mgpu_surf, bo);
}
uint32_t fb_id = get_fb_for_bo(bo);
if (conn->pageflip_pending) {
wlr_log(L_ERROR, "Skipping pageflip");
return false;
}
if (!drm->iface->crtc_pageflip(drm, conn, crtc, fb_id, NULL)) {
return false;
}
conn->pageflip_pending = true;
wlr_output_update_enabled(output, true);
return true;
}
static void wlr_drm_connector_set_gamma(struct wlr_output *output,
uint32_t size, uint16_t *r, uint16_t *g, uint16_t *b) {
struct wlr_drm_connector *conn = (struct wlr_drm_connector *)output;
struct wlr_drm_backend *drm = (struct wlr_drm_backend *)output->backend;
bool ok;
if (conn->crtc) {
ok = drm->iface->crtc_set_gamma(drm, conn->crtc, r, g, b, size);
if (ok) {
wlr_output_update_needs_swap(output);
}
}
}
static uint32_t wlr_drm_connector_get_gamma_size(struct wlr_output *output) {
struct wlr_drm_connector *conn = (struct wlr_drm_connector *)output;
struct wlr_drm_backend *drm = (struct wlr_drm_backend *)output->backend;
if (conn->crtc) {
return drm->iface->crtc_get_gamma_size(drm, conn->crtc);
}
return 0;
}
void wlr_drm_connector_start_renderer(struct wlr_drm_connector *conn) {
if (conn->state != WLR_DRM_CONN_CONNECTED) {
return;
}
struct wlr_drm_backend *drm = (struct wlr_drm_backend *)conn->output.backend;
struct wlr_drm_crtc *crtc = conn->crtc;
if (!crtc) {
return;
}
struct wlr_drm_plane *plane = crtc->primary;
struct gbm_bo *bo = wlr_drm_surface_get_front(
drm->parent ? &plane->mgpu_surf : &plane->surf);
uint32_t fb_id = get_fb_for_bo(bo);
struct wlr_drm_mode *mode = (struct wlr_drm_mode *)conn->output.current_mode;
if (drm->iface->crtc_pageflip(drm, conn, crtc, fb_id, &mode->drm_mode)) {
conn->pageflip_pending = true;
wlr_output_update_enabled(&conn->output, true);
} else {
wl_event_source_timer_update(conn->retry_pageflip,
1000000.0f / conn->output.current_mode->refresh);
}
}
void wlr_drm_connector_enable(struct wlr_output *output, bool enable) {
struct wlr_drm_connector *conn = (struct wlr_drm_connector *)output;
if (conn->state != WLR_DRM_CONN_CONNECTED) {
return;
}
struct wlr_drm_backend *drm = (struct wlr_drm_backend *)output->backend;
bool ok = drm->iface->conn_enable(drm, conn, enable);
if (!ok) {
return;
}
if (enable) {
wlr_drm_connector_start_renderer(conn);
}
wlr_output_update_enabled(&conn->output, enable);
}
static void realloc_planes(struct wlr_drm_backend *drm, const uint32_t *crtc_in,
bool *changed_outputs) {
// overlay, primary, cursor
for (int type = 0; type < 3; ++type) {
if (drm->num_type_planes[type] == 0) {
continue;
}
uint32_t possible[drm->num_type_planes[type]];
uint32_t crtc[drm->num_crtcs];
uint32_t crtc_res[drm->num_crtcs];
for (size_t i = 0; i < drm->num_type_planes[type]; ++i) {
possible[i] = drm->type_planes[type][i].possible_crtcs;
}
for (size_t i = 0; i < drm->num_crtcs; ++i) {
if (crtc_in[i] == UNMATCHED) {
crtc[i] = SKIP;
} else if (drm->crtcs[i].planes[type]) {
crtc[i] = drm->crtcs[i].planes[type]
- drm->type_planes[type];
} else {
crtc[i] = UNMATCHED;
}
}
match_obj(drm->num_type_planes[type], possible,
drm->num_crtcs, crtc, crtc_res);
for (size_t i = 0; i < drm->num_crtcs; ++i) {
if (crtc_res[i] == UNMATCHED || crtc_res[i] == SKIP) {
continue;
}
struct wlr_drm_crtc *c = &drm->crtcs[i];
struct wlr_drm_plane **old = &c->planes[type];
struct wlr_drm_plane *new = &drm->type_planes[type][crtc_res[i]];
if (*old != new) {
changed_outputs[crtc_res[i]] = true;
if (*old) {
wlr_drm_surface_finish(&(*old)->surf);
}
wlr_drm_surface_finish(&new->surf);
*old = new;
}
}
}
}
static void realloc_crtcs(struct wlr_drm_backend *drm,
struct wlr_drm_connector *conn, bool *changed_outputs) {
uint32_t crtc[drm->num_crtcs];
uint32_t crtc_res[drm->num_crtcs];
ssize_t num_outputs = wl_list_length(&drm->outputs);
uint32_t possible_crtc[num_outputs];
for (size_t i = 0; i < drm->num_crtcs; ++i) {
crtc[i] = UNMATCHED;
}
memset(possible_crtc, 0, sizeof(possible_crtc));
ssize_t index = -1, i = -1;
struct wlr_drm_connector *c;
wl_list_for_each(c, &drm->outputs, link) {
i++;
if (c == conn) {
index = i;
}
if (c->crtc) {
crtc[c->crtc - drm->crtcs] = i;
}
if (c->state == WLR_DRM_CONN_CONNECTED) {
possible_crtc[i] = c->possible_crtc;
}
}
assert(index != -1);
possible_crtc[index] = conn->possible_crtc;
match_obj(wl_list_length(&drm->outputs), possible_crtc,
drm->num_crtcs, crtc, crtc_res);
bool matched[num_outputs];
memset(matched, false, sizeof(matched));
for (size_t i = 0; i < drm->num_crtcs; ++i) {
if (crtc_res[i] != UNMATCHED) {
matched[crtc_res[i]] = true;
}
}
// There is no point doing anything if this monitor doesn't get activated
if (!matched[index]) {
return;
}
for (size_t i = 0; i < drm->num_crtcs; ++i) {
// We don't want any of the current monitors to be deactivated.
if (crtc[i] != UNMATCHED && !matched[crtc[i]]) {
return;
}
}
changed_outputs[index] = true;
for (size_t i = 0; i < drm->num_crtcs; ++i) {
if (crtc_res[i] == UNMATCHED) {
continue;
}
if (crtc_res[i] != crtc[i]) {
changed_outputs[crtc_res[i]] = true;
struct wlr_drm_connector *c;
size_t pos = 0;
wl_list_for_each(c, &drm->outputs, link) {
if (pos == crtc_res[i]) {
break;
}
pos++;
}
c->crtc = &drm->crtcs[i];
}
}
realloc_planes(drm, crtc_res, changed_outputs);
}
static uint32_t get_possible_crtcs(int fd, uint32_t conn_id) {
drmModeConnector *conn = drmModeGetConnector(fd, conn_id);
if (!conn) {
wlr_log_errno(L_ERROR, "Failed to get DRM connector");
return 0;
}
if (conn->connection != DRM_MODE_CONNECTED || conn->count_modes == 0) {
wlr_log(L_ERROR, "Output is not connected");
goto error_conn;
}
drmModeEncoder *enc = NULL;
for (int i = 0; !enc && i < conn->count_encoders; ++i) {
enc = drmModeGetEncoder(fd, conn->encoders[i]);
}
if (!enc) {
wlr_log(L_ERROR, "Failed to get DRM encoder");
goto error_conn;
}
uint32_t ret = enc->possible_crtcs;
drmModeFreeEncoder(enc);
drmModeFreeConnector(conn);
return ret;
error_conn:
drmModeFreeConnector(conn);
return 0;
}
static bool wlr_drm_connector_set_mode(struct wlr_output *output,
struct wlr_output_mode *mode) {
struct wlr_drm_connector *conn = (struct wlr_drm_connector *)output;
struct wlr_drm_backend *drm = (struct wlr_drm_backend *)output->backend;
bool changed_outputs[wl_list_length(&drm->outputs)];
wlr_log(L_INFO, "Modesetting '%s' with '%ux%u@%u mHz'", conn->output.name,
mode->width, mode->height, mode->refresh);
conn->possible_crtc = get_possible_crtcs(drm->fd, conn->id);
if (conn->possible_crtc == 0) {
goto error_conn;
}
memset(changed_outputs, false, sizeof(changed_outputs));
realloc_crtcs(drm, conn, changed_outputs);
if (!conn->crtc) {
wlr_log(L_ERROR, "Unable to match %s with a CRTC", conn->output.name);
goto error_conn;
}
struct wlr_drm_crtc *crtc = conn->crtc;
if (!crtc) {
return false;
}
wlr_log(L_DEBUG, "%s: crtc=%td ovr=%td pri=%td cur=%td", conn->output.name,
crtc - drm->crtcs,
crtc->overlay ? crtc->overlay - drm->overlay_planes : -1,
crtc->primary ? crtc->primary - drm->primary_planes : -1,
crtc->cursor ? crtc->cursor - drm->cursor_planes : -1);
conn->state = WLR_DRM_CONN_CONNECTED;
wlr_output_update_mode(&conn->output, mode);
// Since realloc_crtcs can deallocate planes on OTHER outputs,
// we actually need to reinitialize any than has changed
ssize_t output_index = -1;
wl_list_for_each(conn, &drm->outputs, link) {
output_index += 1;
struct wlr_output_mode *mode = conn->output.current_mode;
struct wlr_drm_crtc *crtc = conn->crtc;
if (conn->state != WLR_DRM_CONN_CONNECTED ||
!changed_outputs[output_index]) {
continue;
}
if (!wlr_drm_plane_surfaces_init(crtc->primary, drm,
mode->width, mode->height, GBM_FORMAT_XRGB8888)) {
wlr_log(L_ERROR, "Failed to initialize renderer for plane");
goto error_conn;
}
wlr_drm_connector_start_renderer(conn);
}
return true;
error_conn:
wlr_drm_connector_cleanup(conn);
return false;
}
static void wlr_drm_connector_transform(struct wlr_output *output,
enum wl_output_transform transform) {
output->transform = transform;
}
static bool wlr_drm_connector_set_cursor(struct wlr_output *output,
const uint8_t *buf, int32_t stride, uint32_t width, uint32_t height,
int32_t hotspot_x, int32_t hotspot_y, bool update_pixels) {
struct wlr_drm_connector *conn = (struct wlr_drm_connector *)output;
struct wlr_drm_backend *drm = (struct wlr_drm_backend *)output->backend;
struct wlr_drm_renderer *renderer = &drm->renderer;
struct wlr_drm_crtc *crtc = conn->crtc;
if (!crtc) {
return false;
}
struct wlr_drm_plane *plane = crtc->cursor;
if (!plane) {
// We don't have a real cursor plane, so we make a fake one
plane = calloc(1, sizeof(*plane));
if (!plane) {
wlr_log_errno(L_ERROR, "Allocation failed");
return false;
}
crtc->cursor = plane;
}
if (!plane->surf.gbm) {
int ret;
uint64_t w, h;
ret = drmGetCap(drm->fd, DRM_CAP_CURSOR_WIDTH, &w);
w = ret ? 64 : w;
ret = drmGetCap(drm->fd, DRM_CAP_CURSOR_HEIGHT, &h);
h = ret ? 64 : h;
if (width > w || height > h) {
wlr_log(L_INFO, "Cursor too large (max %dx%d)", (int)w, (int)h);
return false;
}
if (!wlr_drm_surface_init(&plane->surf, renderer, w, h,
GBM_FORMAT_ARGB8888, 0)) {
wlr_log(L_ERROR, "Cannot allocate cursor resources");
return false;
}
plane->cursor_bo = gbm_bo_create(renderer->gbm, w, h,
GBM_FORMAT_ARGB8888, GBM_BO_USE_CURSOR | GBM_BO_USE_WRITE);
if (!plane->cursor_bo) {
wlr_log_errno(L_ERROR, "Failed to create cursor bo");
return false;
}
// OpenGL will read the pixels out upside down,
// so we need to flip the image vertically
enum wl_output_transform transform = wlr_output_transform_compose(
wlr_output_transform_invert(output->transform),
WL_OUTPUT_TRANSFORM_FLIPPED_180);
wlr_matrix_texture(plane->matrix, plane->surf.width, plane->surf.height,
transform);
plane->wlr_tex =
wlr_render_texture_create(plane->surf.renderer->wlr_rend);
if (!plane->wlr_tex) {
return false;
}
}
struct wlr_box hotspot = { .x = hotspot_x, .y = hotspot_y };
enum wl_output_transform transform =
wlr_output_transform_invert(output->transform);
wlr_box_transform(&hotspot, transform,
plane->surf.width, plane->surf.height, &hotspot);
if (plane->cursor_hotspot_x != hotspot.x ||
plane->cursor_hotspot_y != hotspot.y) {
// Update cursor hotspot
conn->cursor_x -= hotspot.x - plane->cursor_hotspot_x;
conn->cursor_y -= hotspot.y - plane->cursor_hotspot_y;
plane->cursor_hotspot_x = hotspot.x;
plane->cursor_hotspot_y = hotspot.y;
if (!drm->iface->crtc_move_cursor(drm, conn->crtc, conn->cursor_x,
conn->cursor_y)) {
return false;
}
wlr_output_update_needs_swap(output);
}
if (!update_pixels) {
// Don't update cursor image
return true;
}
plane->cursor_enabled = buf != NULL;
if (buf != NULL) {
uint32_t bo_width = gbm_bo_get_width(plane->cursor_bo);
uint32_t bo_height = gbm_bo_get_height(plane->cursor_bo);
uint32_t bo_stride;
void *bo_data;
if (!gbm_bo_map(plane->cursor_bo, 0, 0, bo_width, bo_height,
GBM_BO_TRANSFER_WRITE, &bo_stride, &bo_data)) {
wlr_log_errno(L_ERROR, "Unable to map buffer");
return false;
}
wlr_drm_surface_make_current(&plane->surf, NULL);
wlr_texture_upload_pixels(plane->wlr_tex, WL_SHM_FORMAT_ARGB8888,
stride, width, height, buf);
glViewport(0, 0, plane->surf.width, plane->surf.height);
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
float matrix[16];
wlr_texture_get_matrix(plane->wlr_tex, &matrix, &plane->matrix, 0, 0);
wlr_render_with_matrix(plane->surf.renderer->wlr_rend, plane->wlr_tex,
&matrix, 1.0f);
glFinish();
glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, bo_stride);
glReadPixels(0, 0, plane->surf.width, plane->surf.height, GL_BGRA_EXT,
GL_UNSIGNED_BYTE, bo_data);
glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, 0);
wlr_drm_surface_swap_buffers(&plane->surf, NULL);
gbm_bo_unmap(plane->cursor_bo, bo_data);
}
if (!drm->session->active) {
return true; // will be committed when session is resumed
}
struct gbm_bo *bo = plane->cursor_enabled ? plane->cursor_bo : NULL;
bool ok = drm->iface->crtc_set_cursor(drm, crtc, bo);
if (ok) {
wlr_output_update_needs_swap(output);
}
return ok;
}
static bool wlr_drm_connector_move_cursor(struct wlr_output *output,
int x, int y) {
struct wlr_drm_connector *conn = (struct wlr_drm_connector *)output;
struct wlr_drm_backend *drm = (struct wlr_drm_backend *)output->backend;
if (!conn->crtc) {
return false;
}
struct wlr_drm_plane *plane = conn->crtc->cursor;
struct wlr_box box = { .x = x, .y = y };
int width, height;
wlr_output_transformed_resolution(output, &width, &height);
enum wl_output_transform transform =
wlr_output_transform_invert(output->transform);
wlr_box_transform(&box, transform, width, height, &box);
if (plane != NULL) {
box.x -= plane->cursor_hotspot_x;
box.y -= plane->cursor_hotspot_y;
}
conn->cursor_x = box.x;
conn->cursor_y = box.y;
if (!drm->session->active) {
return true; // will be committed when session is resumed
}
bool ok = drm->iface->crtc_move_cursor(drm, conn->crtc, box.x, box.y);
if (ok) {
wlr_output_update_needs_swap(output);
}
return ok;
}
static void wlr_drm_connector_destroy(struct wlr_output *output) {
struct wlr_drm_connector *conn = (struct wlr_drm_connector *)output;
wlr_drm_connector_cleanup(conn);
wl_event_source_remove(conn->retry_pageflip);
wl_list_remove(&conn->link);
free(conn);
}
static struct wlr_output_impl output_impl = {
.enable = wlr_drm_connector_enable,
.set_mode = wlr_drm_connector_set_mode,
.transform = wlr_drm_connector_transform,
.set_cursor = wlr_drm_connector_set_cursor,
.move_cursor = wlr_drm_connector_move_cursor,
.destroy = wlr_drm_connector_destroy,
.make_current = wlr_drm_connector_make_current,
.swap_buffers = wlr_drm_connector_swap_buffers,
.set_gamma = wlr_drm_connector_set_gamma,
.get_gamma_size = wlr_drm_connector_get_gamma_size,
};
bool wlr_output_is_drm(struct wlr_output *output) {
return output->impl == &output_impl;
}
static int retry_pageflip(void *data) {
struct wlr_drm_connector *conn = data;
wlr_log(L_INFO, "%s: Retrying pageflip", conn->output.name);
wlr_drm_connector_start_renderer(conn);
return 0;
}
static const int32_t subpixel_map[] = {
[DRM_MODE_SUBPIXEL_UNKNOWN] = WL_OUTPUT_SUBPIXEL_UNKNOWN,
[DRM_MODE_SUBPIXEL_HORIZONTAL_RGB] = WL_OUTPUT_SUBPIXEL_HORIZONTAL_RGB,
[DRM_MODE_SUBPIXEL_HORIZONTAL_BGR] = WL_OUTPUT_SUBPIXEL_HORIZONTAL_BGR,
[DRM_MODE_SUBPIXEL_VERTICAL_RGB] = WL_OUTPUT_SUBPIXEL_VERTICAL_RGB,
[DRM_MODE_SUBPIXEL_VERTICAL_BGR] = WL_OUTPUT_SUBPIXEL_VERTICAL_BGR,
[DRM_MODE_SUBPIXEL_NONE] = WL_OUTPUT_SUBPIXEL_NONE,
};
void wlr_drm_scan_connectors(struct wlr_drm_backend *drm) {
wlr_log(L_INFO, "Scanning DRM connectors");
drmModeRes *res = drmModeGetResources(drm->fd);
if (!res) {
wlr_log_errno(L_ERROR, "Failed to get DRM resources");
return;
}
size_t seen_len = wl_list_length(&drm->outputs);
// +1 so length can never be 0, which is undefined behaviour.
// Last element isn't used.
bool seen[seen_len + 1];
memset(seen, 0, sizeof(seen));
for (int i = 0; i < res->count_connectors; ++i) {
drmModeConnector *drm_conn = drmModeGetConnector(drm->fd,
res->connectors[i]);
if (!drm_conn) {
wlr_log_errno(L_ERROR, "Failed to get DRM connector");
continue;
}
drmModeEncoder *curr_enc = drmModeGetEncoder(drm->fd,
drm_conn->encoder_id);
int index = -1;
struct wlr_drm_connector *c, *wlr_conn = NULL;
wl_list_for_each(c, &drm->outputs, link) {
index++;
if (c->id == drm_conn->connector_id) {
wlr_conn = c;
break;
}
}
if (!wlr_conn) {
wlr_conn = calloc(1, sizeof(*wlr_conn));
if (!wlr_conn) {
wlr_log_errno(L_ERROR, "Allocation failed");
drmModeFreeEncoder(curr_enc);
drmModeFreeConnector(drm_conn);
continue;
}
wlr_output_init(&wlr_conn->output, &drm->backend, &output_impl,
drm->display);
struct wl_event_loop *ev = wl_display_get_event_loop(drm->display);
wlr_conn->retry_pageflip = wl_event_loop_add_timer(ev, retry_pageflip,
wlr_conn);
wlr_conn->state = WLR_DRM_CONN_DISCONNECTED;
wlr_conn->id = drm_conn->connector_id;
if (curr_enc) {
wlr_conn->old_crtc = drmModeGetCrtc(drm->fd, curr_enc->crtc_id);
}
snprintf(wlr_conn->output.name, sizeof(wlr_conn->output.name),
"%s-%"PRIu32,
conn_get_name(drm_conn->connector_type),
drm_conn->connector_type_id);
wl_list_insert(&drm->outputs, &wlr_conn->link);
wlr_log(L_INFO, "Found display '%s'", wlr_conn->output.name);
} else {
seen[index] = true;
}
if (curr_enc) {
for (size_t i = 0; i < drm->num_crtcs; ++i) {
if (drm->crtcs[i].id == curr_enc->crtc_id) {
wlr_conn->crtc = &drm->crtcs[i];
break;
}
}
} else {
wlr_conn->crtc = NULL;
}
if (wlr_conn->state == WLR_DRM_CONN_DISCONNECTED &&
drm_conn->connection == DRM_MODE_CONNECTED) {
wlr_log(L_INFO, "'%s' connected", wlr_conn->output.name);
wlr_conn->output.phys_width = drm_conn->mmWidth;
wlr_conn->output.phys_height = drm_conn->mmHeight;
wlr_log(L_INFO, "Physical size: %"PRId32"x%"PRId32,
wlr_conn->output.phys_width, wlr_conn->output.phys_height);
wlr_conn->output.subpixel = subpixel_map[drm_conn->subpixel];
wlr_drm_get_connector_props(drm->fd, wlr_conn->id, &wlr_conn->props);
size_t edid_len = 0;
uint8_t *edid = wlr_drm_get_prop_blob(drm->fd,
wlr_conn->id, wlr_conn->props.edid, &edid_len);
parse_edid(&wlr_conn->output, edid_len, edid);
free(edid);
wlr_log(L_INFO, "Detected modes:");
for (int i = 0; i < drm_conn->count_modes; ++i) {
struct wlr_drm_mode *mode = calloc(1, sizeof(*mode));
if (!mode) {
wlr_log_errno(L_ERROR, "Allocation failed");
continue;
}
mode->drm_mode = drm_conn->modes[i];
mode->wlr_mode.width = mode->drm_mode.hdisplay;
mode->wlr_mode.height = mode->drm_mode.vdisplay;
mode->wlr_mode.refresh = calculate_refresh_rate(&mode->drm_mode);
wlr_log(L_INFO, " %"PRId32"@%"PRId32"@%"PRId32,
mode->wlr_mode.width, mode->wlr_mode.height,
mode->wlr_mode.refresh);
wl_list_insert(&wlr_conn->output.modes, &mode->wlr_mode.link);
}
wlr_output_update_enabled(&wlr_conn->output, true);
wlr_conn->state = WLR_DRM_CONN_NEEDS_MODESET;
wlr_log(L_INFO, "Sending modesetting signal for '%s'",
wlr_conn->output.name);
wlr_signal_emit_safe(&drm->backend.events.new_output,
&wlr_conn->output);
} else if (wlr_conn->state == WLR_DRM_CONN_CONNECTED &&
drm_conn->connection != DRM_MODE_CONNECTED) {
wlr_log(L_INFO, "'%s' disconnected", wlr_conn->output.name);
wlr_output_update_enabled(&wlr_conn->output, false);
wlr_drm_connector_cleanup(wlr_conn);
}
drmModeFreeEncoder(curr_enc);
drmModeFreeConnector(drm_conn);
}
drmModeFreeResources(res);
struct wlr_drm_connector *conn, *tmp_conn;
size_t index = wl_list_length(&drm->outputs);
wl_list_for_each_safe(conn, tmp_conn, &drm->outputs, link) {
index--;
if (index >= seen_len || seen[index]) {
continue;
}
wlr_log(L_INFO, "'%s' disappeared", conn->output.name);
wlr_drm_connector_cleanup(conn);
drmModeFreeCrtc(conn->old_crtc);
wl_event_source_remove(conn->retry_pageflip);
wl_list_remove(&conn->link);
free(conn);
}
}
static void page_flip_handler(int fd, unsigned seq,
unsigned tv_sec, unsigned tv_usec, void *user) {
struct wlr_drm_connector *conn = user;
struct wlr_drm_backend *drm = (struct wlr_drm_backend *)conn->output.backend;
conn->pageflip_pending = false;
if (conn->state != WLR_DRM_CONN_CONNECTED) {
return;
}
wlr_drm_surface_post(&conn->crtc->primary->surf);
if (drm->parent) {
wlr_drm_surface_post(&conn->crtc->primary->mgpu_surf);
}
if (drm->session->active) {
wlr_output_send_frame(&conn->output);
}
}
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;
}
void wlr_drm_restore_outputs(struct wlr_drm_backend *drm) {
uint64_t to_close = (1 << wl_list_length(&drm->outputs)) - 1;
struct wlr_drm_connector *conn;
wl_list_for_each(conn, &drm->outputs, link) {
if (conn->state == WLR_DRM_CONN_CONNECTED) {
conn->state = WLR_DRM_CONN_CLEANUP;
}
}
time_t timeout = time(NULL) + 5;
while (to_close && time(NULL) < timeout) {
wlr_drm_event(drm->fd, 0, NULL);
size_t i = 0;
struct wlr_drm_connector *conn;
wl_list_for_each(conn, &drm->outputs, link) {
if (conn->state != WLR_DRM_CONN_CLEANUP || !conn->pageflip_pending) {
to_close &= ~(1 << i);
}
i++;
}
}
if (to_close) {
wlr_log(L_ERROR, "Timed out stopping output renderers");
}
wl_list_for_each(conn, &drm->outputs, link) {
drmModeCrtc *crtc = conn->old_crtc;
if (!crtc) {
continue;
}
drmModeSetCrtc(drm->fd, crtc->crtc_id, crtc->buffer_id, crtc->x, crtc->y,
&conn->id, 1, &crtc->mode);
drmModeFreeCrtc(crtc);
}
}
void wlr_drm_connector_cleanup(struct wlr_drm_connector *conn) {
if (!conn) {
return;
}
switch (conn->state) {
case WLR_DRM_CONN_CONNECTED:
case WLR_DRM_CONN_CLEANUP:;
struct wlr_drm_crtc *crtc = conn->crtc;
for (int i = 0; i < 3; ++i) {
if (!crtc->planes[i]) {
continue;
}
wlr_drm_surface_finish(&crtc->planes[i]->surf);
wlr_drm_surface_finish(&crtc->planes[i]->mgpu_surf);
if (crtc->planes[i]->id == 0) {
free(crtc->planes[i]);
crtc->planes[i] = NULL;
}
}
struct wlr_drm_mode *mode;
struct wlr_drm_mode *tmp;
wl_list_for_each_safe(mode, tmp, &conn->output.modes, wlr_mode.link) {
wl_list_remove(&mode->wlr_mode.link);
free(mode);
}
memset(&conn->output.make, 0, sizeof(conn->output.make));
memset(&conn->output.model, 0, sizeof(conn->output.model));
memset(&conn->output.serial, 0, sizeof(conn->output.serial));
conn->crtc = NULL;
conn->possible_crtc = 0;
/* Fallthrough */
case WLR_DRM_CONN_NEEDS_MODESET:
wlr_log(L_INFO, "Emitting destruction signal for '%s'",
conn->output.name);
wlr_signal_emit_safe(&conn->output.events.destroy, &conn->output);
break;
case WLR_DRM_CONN_DISCONNECTED:
break;
}
conn->state = WLR_DRM_CONN_DISCONNECTED;
}