wlroots/backend/drm/drm.c

1688 lines
46 KiB
C

#define _XOPEN_SOURCE 700
#include <assert.h>
#include <drm_fourcc.h>
#include <drm_mode.h>
#include <errno.h>
#include <gbm.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <inttypes.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <time.h>
#include <wayland-server-core.h>
#include <wayland-util.h>
#include <wlr/backend/interface.h>
#include <wlr/interfaces/wlr_output.h>
#include <wlr/render/gles2.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/types/wlr_matrix.h>
#include <wlr/util/log.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include "backend/drm/cvt.h"
#include "backend/drm/drm.h"
#include "backend/drm/iface.h"
#include "backend/drm/util.h"
#include "util/signal.h"
bool check_drm_features(struct wlr_drm_backend *drm) {
uint64_t cap;
if (drm->parent) {
if (drmGetCap(drm->fd, DRM_CAP_PRIME, &cap) ||
!(cap & DRM_PRIME_CAP_IMPORT)) {
wlr_log(WLR_ERROR,
"PRIME import not supported on secondary GPU");
return false;
}
if (drmGetCap(drm->parent->fd, DRM_CAP_PRIME, &cap) ||
!(cap & DRM_PRIME_CAP_EXPORT)) {
wlr_log(WLR_ERROR,
"PRIME export not supported on primary GPU");
return false;
}
}
if (drmSetClientCap(drm->fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1)) {
wlr_log(WLR_ERROR, "DRM universal planes unsupported");
return false;
}
if (drmGetCap(drm->fd, DRM_CAP_CRTC_IN_VBLANK_EVENT, &cap) || !cap) {
wlr_log(WLR_ERROR, "DRM_CRTC_IN_VBLANK_EVENT unsupported");
return false;
}
const char *no_atomic = getenv("WLR_DRM_NO_ATOMIC");
if (no_atomic && strcmp(no_atomic, "1") == 0) {
wlr_log(WLR_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(WLR_DEBUG,
"Atomic modesetting unsupported, using legacy DRM interface");
drm->iface = &legacy_iface;
} else {
wlr_log(WLR_DEBUG, "Using atomic DRM interface");
drm->iface = &atomic_iface;
}
int ret = drmGetCap(drm->fd, DRM_CAP_TIMESTAMP_MONOTONIC, &cap);
drm->clock = (ret == 0 && cap == 1) ? CLOCK_MONOTONIC : CLOCK_REALTIME;
ret = drmGetCap(drm->fd, DRM_CAP_ADDFB2_MODIFIERS, &cap);
drm->addfb2_modifiers = ret == 0 && cap == 1;
return true;
}
static bool add_plane(struct wlr_drm_backend *drm,
struct wlr_drm_crtc *crtc, drmModePlane *drm_plane,
uint32_t type, union wlr_drm_plane_props *props) {
assert(!(type == DRM_PLANE_TYPE_PRIMARY && crtc->primary));
if (type == DRM_PLANE_TYPE_CURSOR && crtc->cursor) {
return true;
}
struct wlr_drm_plane *p = calloc(1, sizeof(*p));
if (!p) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
return false;
}
p->type = type;
p->id = drm_plane->plane_id;
p->props = *props;
for (size_t j = 0; j < drm_plane->count_formats; ++j) {
wlr_drm_format_set_add(&p->formats, drm_plane->formats[j],
DRM_FORMAT_MOD_INVALID);
}
// Choose an RGB format for the plane
uint32_t rgb_format = DRM_FORMAT_INVALID;
for (size_t j = 0; j < drm_plane->count_formats; ++j) {
uint32_t fmt = drm_plane->formats[j];
if (fmt == DRM_FORMAT_ARGB8888) {
// Prefer formats with alpha channel
rgb_format = fmt;
break;
} else if (fmt == DRM_FORMAT_XRGB8888) {
rgb_format = fmt;
}
}
p->drm_format = rgb_format;
if (p->props.in_formats) {
uint64_t blob_id;
if (!get_drm_prop(drm->fd, p->id, p->props.in_formats, &blob_id)) {
wlr_log(WLR_ERROR, "Failed to read IN_FORMATS property");
goto error;
}
drmModePropertyBlobRes *blob = drmModeGetPropertyBlob(drm->fd, blob_id);
if (!blob) {
wlr_log(WLR_ERROR, "Failed to read IN_FORMATS blob");
goto error;
}
struct drm_format_modifier_blob *data = blob->data;
uint32_t *fmts = (uint32_t *)((char *)data + data->formats_offset);
struct drm_format_modifier *mods = (struct drm_format_modifier *)
((char *)data + data->modifiers_offset);
for (uint32_t i = 0; i < data->count_modifiers; ++i) {
for (int j = 0; j < 64; ++j) {
if (mods[i].formats & ((uint64_t)1 << j)) {
wlr_drm_format_set_add(&p->formats,
fmts[j + mods[i].offset], mods[i].modifier);
}
}
}
drmModeFreePropertyBlob(blob);
}
switch (type) {
case DRM_PLANE_TYPE_PRIMARY:
crtc->primary = p;
break;
case DRM_PLANE_TYPE_CURSOR:
crtc->cursor = p;
break;
default:
abort();
}
return true;
error:
free(p);
return false;
}
static bool init_planes(struct wlr_drm_backend *drm) {
drmModePlaneRes *plane_res = drmModeGetPlaneResources(drm->fd);
if (!plane_res) {
wlr_log_errno(WLR_ERROR, "Failed to get DRM plane resources");
return false;
}
wlr_log(WLR_INFO, "Found %"PRIu32" DRM planes", plane_res->count_planes);
for (uint32_t i = 0; i < plane_res->count_planes; ++i) {
uint32_t id = plane_res->planes[i];
drmModePlane *plane = drmModeGetPlane(drm->fd, id);
if (!plane) {
wlr_log_errno(WLR_ERROR, "Failed to get DRM plane");
goto error;
}
union wlr_drm_plane_props props = {0};
if (!get_drm_plane_props(drm->fd, id, &props)) {
drmModeFreePlane(plane);
goto error;
}
uint64_t type;
if (!get_drm_prop(drm->fd, id, props.type, &type)) {
drmModeFreePlane(plane);
goto error;
}
/*
* This is a very naive implementation of the plane matching
* logic. Primary and cursor planes should only work on a
* single CRTC, and this should be perfectly adequate, but
* overlay planes can potentially work with multiple CRTCs,
* meaning this could return inefficient/skewed results.
*
* However, we don't really care about overlay planes, as we
* don't support them yet. We only bother to keep basic
* tracking of them for DRM lease clients.
*
* possible_crtcs is a bitmask of crtcs, where each bit is an
* index into drmModeRes.crtcs. So if bit 0 is set (ffs starts
* counting from 1), crtc 0 is possible.
*/
int crtc_bit = ffs(plane->possible_crtcs) - 1;
// This would be a kernel bug
assert(crtc_bit >= 0 && (size_t)crtc_bit < drm->num_crtcs);
struct wlr_drm_crtc *crtc = &drm->crtcs[crtc_bit];
if (type == DRM_PLANE_TYPE_OVERLAY) {
uint32_t *tmp = realloc(crtc->overlays,
sizeof(*crtc->overlays) * (crtc->num_overlays + 1));
if (tmp) {
crtc->overlays = tmp;
crtc->overlays[crtc->num_overlays++] = id;
}
drmModeFreePlane(plane);
continue;
}
if (!add_plane(drm, crtc, plane, type, &props)) {
drmModeFreePlane(plane);
goto error;
}
drmModeFreePlane(plane);
}
drmModeFreePlaneResources(plane_res);
return true;
error:
drmModeFreePlaneResources(plane_res);
return false;
}
bool init_drm_resources(struct wlr_drm_backend *drm) {
drmModeRes *res = drmModeGetResources(drm->fd);
if (!res) {
wlr_log_errno(WLR_ERROR, "Failed to get DRM resources");
return false;
}
wlr_log(WLR_INFO, "Found %d DRM CRTCs", res->count_crtcs);
drm->num_crtcs = res->count_crtcs;
if (drm->num_crtcs == 0) {
drmModeFreeResources(res);
return true;
}
drm->crtcs = calloc(drm->num_crtcs, sizeof(drm->crtcs[0]));
if (!drm->crtcs) {
wlr_log_errno(WLR_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);
get_drm_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 finish_drm_resources(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];
drmModeFreeCrtc(crtc->legacy_crtc);
if (crtc->mode_id) {
drmModeDestroyPropertyBlob(drm->fd, crtc->mode_id);
}
if (crtc->gamma_lut) {
drmModeDestroyPropertyBlob(drm->fd, crtc->gamma_lut);
}
free(crtc->gamma_table);
if (crtc->primary) {
wlr_drm_format_set_finish(&crtc->primary->formats);
free(crtc->primary);
}
if (crtc->cursor) {
wlr_drm_format_set_finish(&crtc->cursor->formats);
free(crtc->cursor);
}
free(crtc->overlays);
}
free(drm->crtcs);
}
static struct wlr_drm_connector *get_drm_connector_from_output(
struct wlr_output *wlr_output) {
assert(wlr_output_is_drm(wlr_output));
return (struct wlr_drm_connector *)wlr_output;
}
static bool drm_connector_attach_render(struct wlr_output *output,
int *buffer_age) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
return drm_surface_make_current(&conn->crtc->primary->surf, buffer_age);
}
static bool drm_crtc_commit(struct wlr_drm_connector *conn, uint32_t flags) {
struct wlr_drm_backend *drm =
get_drm_backend_from_backend(conn->output.backend);
struct wlr_drm_crtc *crtc = conn->crtc;
bool ok = drm->iface->crtc_commit(drm, conn, flags);
crtc->pending = 0;
return ok;
}
static bool drm_crtc_page_flip(struct wlr_drm_connector *conn) {
struct wlr_drm_crtc *crtc = conn->crtc;
if (conn->pageflip_pending) {
wlr_log(WLR_ERROR, "Failed to page-flip output '%s': "
"a page-flip is already pending", conn->output.name);
return false;
}
assert(crtc->active);
assert(plane_get_next_fb(crtc->primary)->type != WLR_DRM_FB_TYPE_NONE);
if (!drm_crtc_commit(conn, DRM_MODE_PAGE_FLIP_EVENT)) {
return false;
}
conn->pageflip_pending = true;
drm_fb_move(&crtc->primary->queued_fb, &crtc->primary->pending_fb);
drm_fb_move(&crtc->cursor->queued_fb, &crtc->cursor->pending_fb);
wlr_output_update_enabled(&conn->output, true);
return true;
}
static uint32_t strip_alpha_channel(uint32_t format) {
switch (format) {
case DRM_FORMAT_ARGB8888:
return DRM_FORMAT_XRGB8888;
default:
return DRM_FORMAT_INVALID;
}
}
static bool test_buffer(struct wlr_drm_connector *conn,
struct wlr_buffer *wlr_buffer) {
struct wlr_output *output = &conn->output;
struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
if (!drm->session->active) {
return false;
}
/* Legacy never gets to have nice things. But I doubt this would ever work,
* and there is no reliable way to try, without risking messing up the
* modesetting state. */
if (drm->iface == &legacy_iface) {
return false;
}
struct wlr_drm_crtc *crtc = conn->crtc;
if (!crtc) {
return false;
}
struct wlr_dmabuf_attributes attribs;
if (!wlr_buffer_get_dmabuf(wlr_buffer, &attribs)) {
return false;
}
if (attribs.flags != 0) {
return false;
}
if (!wlr_drm_format_set_has(&crtc->primary->formats,
attribs.format, attribs.modifier)) {
// The format isn't supported by the plane. Try stripping the alpha
// channel, if any.
uint32_t format = strip_alpha_channel(attribs.format);
if (format != DRM_FORMAT_INVALID && wlr_drm_format_set_has(
&crtc->primary->formats, format, attribs.modifier)) {
attribs.format = format;
} else {
return false;
}
}
return true;
}
static bool drm_connector_test(struct wlr_output *output) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
if ((output->pending.committed & WLR_OUTPUT_STATE_BUFFER) &&
output->pending.buffer_type == WLR_OUTPUT_STATE_BUFFER_SCANOUT) {
if (!test_buffer(conn, output->pending.buffer)) {
return false;
}
}
return true;
}
static bool drm_connector_commit_buffer(struct wlr_output *output) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
struct wlr_drm_crtc *crtc = conn->crtc;
if (!crtc) {
return false;
}
struct wlr_drm_plane *plane = crtc->primary;
assert(output->pending.committed & WLR_OUTPUT_STATE_BUFFER);
switch (output->pending.buffer_type) {
case WLR_OUTPUT_STATE_BUFFER_RENDER:
if (!drm_fb_lock_surface(&plane->pending_fb, &plane->surf)) {
wlr_log(WLR_ERROR, "drm_fb_lock_surface failed");
return false;
}
break;
case WLR_OUTPUT_STATE_BUFFER_SCANOUT:;
struct wlr_buffer *buffer = output->pending.buffer;
if (!test_buffer(conn, output->pending.buffer)) {
return false;
}
if (!drm_fb_import_wlr(&plane->pending_fb, &drm->renderer, buffer,
&crtc->primary->formats)) {
return false;
}
break;
}
if (!drm_crtc_page_flip(conn)) {
drm_fb_clear(&plane->pending_fb);
return false;
}
return true;
}
static void drm_connector_enable_adaptive_sync(struct wlr_output *output,
bool enabled) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
struct wlr_drm_crtc *crtc = conn->crtc;
if (!crtc) {
return;
}
uint64_t vrr_capable;
if (conn->props.vrr_capable == 0 ||
!get_drm_prop(drm->fd, conn->id, conn->props.vrr_capable,
&vrr_capable) || !vrr_capable) {
wlr_log(WLR_DEBUG, "Failed to enable adaptive sync: "
"connector '%s' doesn't support VRR", output->name);
return;
}
if (crtc->props.vrr_enabled == 0) {
wlr_log(WLR_DEBUG, "Failed to enable adaptive sync: "
"CRTC %"PRIu32" doesn't support VRR", crtc->id);
return;
}
if (drmModeObjectSetProperty(drm->fd, crtc->id, DRM_MODE_OBJECT_CRTC,
crtc->props.vrr_enabled, enabled) != 0) {
wlr_log_errno(WLR_ERROR, "drmModeObjectSetProperty(VRR_ENABLED) failed");
return;
}
output->adaptive_sync_status = enabled ? WLR_OUTPUT_ADAPTIVE_SYNC_ENABLED :
WLR_OUTPUT_ADAPTIVE_SYNC_DISABLED;
wlr_log(WLR_DEBUG, "VRR %s on connector '%s'",
enabled ? "enabled" : "disabled", output->name);
}
static bool drm_connector_set_custom_mode(struct wlr_output *output,
int32_t width, int32_t height, int32_t refresh);
static bool drm_connector_commit(struct wlr_output *output) {
struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
if (!drm_connector_test(output)) {
return false;
}
if (!drm->session->active) {
return false;
}
if (output->pending.committed & WLR_OUTPUT_STATE_MODE) {
switch (output->pending.mode_type) {
case WLR_OUTPUT_STATE_MODE_FIXED:
if (!drm_connector_set_mode(output, output->pending.mode)) {
return false;
}
break;
case WLR_OUTPUT_STATE_MODE_CUSTOM:
if (!drm_connector_set_custom_mode(output,
output->pending.custom_mode.width,
output->pending.custom_mode.height,
output->pending.custom_mode.refresh)) {
return false;
}
break;
}
} else if (output->pending.committed & WLR_OUTPUT_STATE_ENABLED) {
if (!enable_drm_connector(output, output->pending.enabled)) {
return false;
}
}
if (output->pending.committed & WLR_OUTPUT_STATE_ADAPTIVE_SYNC_ENABLED) {
drm_connector_enable_adaptive_sync(output,
output->pending.adaptive_sync_enabled);
}
// TODO: support modesetting with a buffer
if (output->pending.committed & WLR_OUTPUT_STATE_BUFFER &&
!(output->pending.committed & WLR_OUTPUT_STATE_MODE)) {
if (!drm_connector_commit_buffer(output)) {
return false;
}
}
wlr_egl_make_current(&drm->renderer.egl, EGL_NO_SURFACE, NULL);
return true;
}
static void drm_connector_rollback(struct wlr_output *output) {
struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
wlr_egl_make_current(&drm->renderer.egl, EGL_NO_SURFACE, NULL);
}
static void fill_empty_gamma_table(size_t size,
uint16_t *r, uint16_t *g, uint16_t *b) {
assert(0xFFFF < UINT64_MAX / (size - 1));
for (uint32_t i = 0; i < size; ++i) {
uint16_t val = (uint64_t)0xffff * i / (size - 1);
r[i] = g[i] = b[i] = val;
}
}
static size_t drm_connector_get_gamma_size(struct wlr_output *output) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
struct wlr_drm_crtc *crtc = conn->crtc;
if (crtc == NULL) {
return 0;
}
if (crtc->props.gamma_lut_size == 0) {
return (size_t)crtc->legacy_crtc->gamma_size;
}
uint64_t gamma_lut_size;
if (!get_drm_prop(drm->fd, crtc->id, crtc->props.gamma_lut_size,
&gamma_lut_size)) {
wlr_log(WLR_ERROR, "Unable to get gamma lut size");
return 0;
}
return gamma_lut_size;
}
bool set_drm_connector_gamma(struct wlr_output *output, size_t size,
const uint16_t *r, const uint16_t *g, const uint16_t *b) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
if (!conn->crtc) {
return false;
}
bool reset = false;
if (size == 0) {
reset = true;
size = drm_connector_get_gamma_size(output);
if (size == 0) {
return false;
}
}
uint16_t *gamma_table = malloc(3 * size * sizeof(uint16_t));
if (gamma_table == NULL) {
wlr_log(WLR_ERROR, "Failed to allocate gamma table");
return false;
}
uint16_t *_r = gamma_table;
uint16_t *_g = gamma_table + size;
uint16_t *_b = gamma_table + 2 * size;
if (reset) {
fill_empty_gamma_table(size, _r, _g, _b);
} else {
memcpy(_r, r, size * sizeof(uint16_t));
memcpy(_g, g, size * sizeof(uint16_t));
memcpy(_b, b, size * sizeof(uint16_t));
}
conn->crtc->pending |= WLR_DRM_CRTC_GAMMA_LUT;
free(conn->crtc->gamma_table);
conn->crtc->gamma_table = gamma_table;
conn->crtc->gamma_table_size = size;
wlr_output_update_needs_frame(output);
return true; // will be applied on next page-flip
}
static bool drm_connector_export_dmabuf(struct wlr_output *output,
struct wlr_dmabuf_attributes *attribs) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
struct wlr_drm_crtc *crtc = conn->crtc;
if (!drm->session->active) {
return false;
}
if (!crtc) {
return false;
}
struct wlr_drm_plane *plane = crtc->primary;
if (plane->current_fb.type == WLR_DRM_FB_TYPE_NONE) {
return false;
}
return export_drm_bo(plane->current_fb.bo, attribs);
}
struct wlr_drm_fb *plane_get_next_fb(struct wlr_drm_plane *plane) {
if (plane->pending_fb.type != WLR_DRM_FB_TYPE_NONE) {
return &plane->pending_fb;
}
if (plane->queued_fb.type != WLR_DRM_FB_TYPE_NONE) {
return &plane->queued_fb;
}
return &plane->current_fb;
}
static bool drm_connector_pageflip_renderer(struct wlr_drm_connector *conn) {
struct wlr_drm_crtc *crtc = conn->crtc;
if (!crtc) {
wlr_log(WLR_ERROR, "Page-flip failed on connector '%s': no CRTC",
conn->output.name);
return false;
}
// drm_crtc_page_flip expects a FB to be available
struct wlr_drm_plane *plane = crtc->primary;
if (plane_get_next_fb(plane)->type == WLR_DRM_FB_TYPE_NONE) {
drm_surface_render_black_frame(&plane->surf);
if (!drm_fb_lock_surface(&plane->pending_fb, &plane->surf)) {
return false;
}
}
return drm_crtc_page_flip(conn);
}
static void drm_connector_start_renderer(struct wlr_drm_connector *conn) {
struct wlr_drm_crtc *crtc = conn->crtc;
if (conn->state != WLR_DRM_CONN_CONNECTED) {
return;
}
wlr_log(WLR_DEBUG, "Starting renderer on output '%s'", conn->output.name);
struct wlr_drm_mode *mode = (struct wlr_drm_mode *)conn->output.current_mode;
memcpy(&crtc->mode, &mode->drm_mode, sizeof(drmModeModeInfo));
crtc->active = true;
crtc->pending |= WLR_DRM_CRTC_MODE;
if (!drm_connector_pageflip_renderer(conn)) {
wl_event_source_timer_update(conn->retry_pageflip,
1000000.0f / conn->output.current_mode->refresh);
}
}
static bool drm_connector_init_renderer(struct wlr_drm_connector *conn,
struct wlr_drm_mode *mode) {
struct wlr_drm_backend *drm =
get_drm_backend_from_backend(conn->output.backend);
if (conn->state != WLR_DRM_CONN_CONNECTED &&
conn->state != WLR_DRM_CONN_NEEDS_MODESET) {
return false;
}
wlr_log(WLR_DEBUG, "Initializing renderer on connector '%s'",
conn->output.name);
struct wlr_drm_crtc *crtc = conn->crtc;
if (!crtc) {
wlr_log(WLR_ERROR, "Failed to initialize renderer on connector '%s': "
"no CRTC", conn->output.name);
return false;
}
struct wlr_drm_plane *plane = crtc->primary;
crtc->pending |= WLR_DRM_CRTC_MODE;
memcpy(&crtc->mode, &mode->drm_mode, sizeof(drmModeModeInfo));
crtc->active = true;
int width = mode->wlr_mode.width;
int height = mode->wlr_mode.height;
uint32_t format = drm->renderer.gbm_format;
bool modifiers = true;
const char *no_modifiers = getenv("WLR_DRM_NO_MODIFIERS");
if (no_modifiers != NULL && strcmp(no_modifiers, "1") == 0) {
wlr_log(WLR_DEBUG,
"WLR_DRM_NO_MODIFIERS set, initializing planes without modifiers");
modifiers = false;
}
if (!drm_plane_init_surface(plane, drm, width, height, format, 0, modifiers) ||
!drm_connector_pageflip_renderer(conn)) {
if (!modifiers) {
wlr_log(WLR_ERROR, "Failed to initialize renderer "
"on connector '%s': initial page-flip failed",
conn->output.name);
return false;
}
// If page-flipping with modifiers enabled doesn't work, retry without
// modifiers
wlr_log(WLR_INFO, "Page-flip failed with primary FB modifiers enabled, "
"retrying without modifiers");
modifiers = false;
if (!drm_plane_init_surface(plane, drm, width, height, format,
0, modifiers)) {
return false;
}
if (!drm_connector_pageflip_renderer(conn)) {
wlr_log(WLR_ERROR, "Failed to initialize renderer "
"on connector '%s': initial page-flip failed",
conn->output.name);
return false;
}
}
return true;
}
static void realloc_crtcs(struct wlr_drm_backend *drm);
static void attempt_enable_needs_modeset(struct wlr_drm_backend *drm) {
// Try to modeset any output that has a desired mode and a CRTC (ie. was
// lacking a CRTC on last modeset)
struct wlr_drm_connector *conn;
wl_list_for_each(conn, &drm->outputs, link) {
if (conn->state == WLR_DRM_CONN_NEEDS_MODESET &&
conn->crtc != NULL && conn->desired_mode != NULL &&
conn->desired_enabled) {
wlr_log(WLR_DEBUG, "Output %s has a desired mode and a CRTC, "
"attempting a modeset", conn->output.name);
drm_connector_set_mode(&conn->output, conn->desired_mode);
}
}
}
bool enable_drm_connector(struct wlr_output *output, bool enable) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
if (conn->state != WLR_DRM_CONN_CONNECTED
&& conn->state != WLR_DRM_CONN_NEEDS_MODESET) {
return false;
}
conn->desired_enabled = enable;
if (enable && conn->crtc == NULL) {
// Maybe we can steal a CRTC from a disabled output
realloc_crtcs(drm);
}
if (conn->crtc == NULL) {
wlr_output_update_enabled(&conn->output, false);
return !enable;
}
conn->crtc->active = enable;
conn->crtc->pending |= WLR_DRM_CRTC_MODE;
if (!drm_crtc_commit(conn, 0)) {
return false;
}
if (enable) {
drm_connector_start_renderer(conn);
} else {
realloc_crtcs(drm);
attempt_enable_needs_modeset(drm);
}
wlr_output_update_enabled(&conn->output, enable);
return true;
}
static void drm_connector_cleanup(struct wlr_drm_connector *conn);
bool drm_connector_set_mode(struct wlr_output *output,
struct wlr_output_mode *wlr_mode) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
if (conn->crtc == NULL) {
// Maybe we can steal a CRTC from a disabled output
realloc_crtcs(drm);
}
if (conn->crtc == NULL) {
wlr_log(WLR_ERROR, "Cannot modeset '%s': no CRTC for this connector",
conn->output.name);
// Save the desired mode for later, when we'll get a proper CRTC
conn->desired_mode = wlr_mode;
return false;
}
wlr_log(WLR_INFO, "Modesetting '%s' with '%ux%u@%u mHz'",
conn->output.name, wlr_mode->width, wlr_mode->height,
wlr_mode->refresh);
struct wlr_drm_mode *mode = (struct wlr_drm_mode *)wlr_mode;
if (!drm_connector_init_renderer(conn, mode)) {
wlr_log(WLR_ERROR, "Failed to initialize renderer for plane");
return false;
}
conn->state = WLR_DRM_CONN_CONNECTED;
conn->desired_mode = NULL;
wlr_output_update_mode(&conn->output, wlr_mode);
wlr_output_update_enabled(&conn->output, true);
conn->desired_enabled = true;
// When switching VTs, the mode is not updated but the buffers become
// invalid, so we need to manually damage the output here
wlr_output_damage_whole(&conn->output);
return true;
}
static bool drm_connector_set_custom_mode(struct wlr_output *output,
int32_t width, int32_t height, int32_t refresh) {
drmModeModeInfo mode = {0};
generate_cvt_mode(&mode, width, height, (float)refresh / 1000, false, false);
mode.type = DRM_MODE_TYPE_USERDEF;
struct wlr_output_mode *wlr_mode = wlr_drm_connector_add_mode(output, &mode);
if (wlr_mode == NULL) {
return false;
}
return drm_connector_set_mode(output, wlr_mode);
}
struct wlr_output_mode *wlr_drm_connector_add_mode(struct wlr_output *output,
const drmModeModeInfo *modeinfo) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
if (modeinfo->type != DRM_MODE_TYPE_USERDEF) {
return NULL;
}
struct wlr_output_mode *wlr_mode;
wl_list_for_each(wlr_mode, &conn->output.modes, link) {
struct wlr_drm_mode *mode = (struct wlr_drm_mode *)wlr_mode;
if (memcmp(&mode->drm_mode, modeinfo, sizeof(*modeinfo)) == 0) {
return wlr_mode;
}
}
struct wlr_drm_mode *mode = calloc(1, sizeof(*mode));
if (!mode) {
return NULL;
}
memcpy(&mode->drm_mode, modeinfo, sizeof(*modeinfo));
mode->wlr_mode.width = mode->drm_mode.hdisplay;
mode->wlr_mode.height = mode->drm_mode.vdisplay;
mode->wlr_mode.refresh = calculate_refresh_rate(modeinfo);
wlr_log(WLR_INFO, "Registered custom mode "
"%"PRId32"x%"PRId32"@%"PRId32,
mode->wlr_mode.width, mode->wlr_mode.height,
mode->wlr_mode.refresh);
wl_list_insert(&conn->output.modes, &mode->wlr_mode.link);
return &mode->wlr_mode;
}
static bool drm_connector_set_cursor(struct wlr_output *output,
struct wlr_texture *texture, float scale,
enum wl_output_transform transform,
int32_t hotspot_x, int32_t hotspot_y, bool update_texture) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
struct wlr_drm_crtc *crtc = conn->crtc;
if (!crtc) {
return false;
}
struct wlr_drm_plane *plane = crtc->cursor;
if (plane == NULL) {
return false;
}
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 (!drm_plane_init_surface(plane, drm, w, h,
DRM_FORMAT_ARGB8888, GBM_BO_USE_LINEAR, false)) {
wlr_log(WLR_ERROR, "Cannot allocate cursor resources");
return false;
}
}
float hotspot_proj[9];
wlr_matrix_projection(hotspot_proj, plane->surf.width,
plane->surf.height, output->transform);
struct wlr_box hotspot = { .x = hotspot_x, .y = hotspot_y };
wlr_box_transform(&hotspot, &hotspot,
wlr_output_transform_invert(output->transform),
plane->surf.width, plane->surf.height);
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;
wlr_output_update_needs_frame(output);
}
if (!update_texture) {
// Don't update cursor image
return true;
}
plane->cursor_enabled = false;
if (texture != NULL) {
int width, height;
wlr_texture_get_size(texture, &width, &height);
width = width * output->scale / scale;
height = height * output->scale / scale;
if (width > (int)plane->surf.width || height > (int)plane->surf.height) {
wlr_log(WLR_ERROR, "Cursor too large (max %dx%d)",
(int)plane->surf.width, (int)plane->surf.height);
return false;
}
drm_surface_make_current(&plane->surf, NULL);
struct wlr_renderer *rend = plane->surf.renderer->wlr_rend;
struct wlr_box cursor_box = { .width = width, .height = height };
float matrix[9];
wlr_matrix_project_box(matrix, &cursor_box, transform, 0, hotspot_proj);
wlr_renderer_begin(rend, plane->surf.width, plane->surf.height);
wlr_renderer_clear(rend, (float[]){ 0.0, 0.0, 0.0, 0.0 });
wlr_render_texture_with_matrix(rend, texture, matrix, 1.0);
wlr_renderer_end(rend);
if (!drm_fb_lock_surface(&plane->pending_fb, &plane->surf)) {
return false;
}
plane->cursor_enabled = true;
}
if (plane->cursor_enabled) {
drm_fb_acquire(&plane->pending_fb, drm, &plane->mgpu_surf);
/* Workaround for nouveau buffers created with GBM_BO_USER_LINEAR are
* placed in NOUVEAU_GEM_DOMAIN_GART. When the bo is attached to the
* cursor plane it is moved to NOUVEAU_GEM_DOMAIN_VRAM. However, this
* does not wait for the render operations to complete, leaving an
* empty surface. See
* https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/issues/480
* The render operations can be waited for using:
*/
glFinish();
}
wlr_output_update_needs_frame(output);
return true;
}
static bool drm_connector_move_cursor(struct wlr_output *output,
int x, int y) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
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, &box, transform, width, height);
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;
wlr_output_update_needs_frame(output);
return true;
}
static void drm_connector_destroy(struct wlr_output *output) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
drm_connector_cleanup(conn);
drmModeFreeCrtc(conn->old_crtc);
wl_event_source_remove(conn->retry_pageflip);
wl_list_remove(&conn->link);
free(conn);
}
static const struct wlr_output_impl output_impl = {
.set_cursor = drm_connector_set_cursor,
.move_cursor = drm_connector_move_cursor,
.destroy = drm_connector_destroy,
.attach_render = drm_connector_attach_render,
.test = drm_connector_test,
.commit = drm_connector_commit,
.rollback = drm_connector_rollback,
.set_gamma = set_drm_connector_gamma,
.get_gamma_size = drm_connector_get_gamma_size,
.export_dmabuf = drm_connector_export_dmabuf,
};
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(WLR_INFO, "%s: Retrying pageflip", conn->output.name);
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,
};
static void dealloc_crtc(struct wlr_drm_connector *conn) {
struct wlr_drm_backend *drm =
get_drm_backend_from_backend(conn->output.backend);
if (conn->crtc == NULL) {
return;
}
wlr_log(WLR_DEBUG, "De-allocating CRTC %zu for output '%s'",
conn->crtc - drm->crtcs, conn->output.name);
set_drm_connector_gamma(&conn->output, 0, NULL, NULL, NULL);
enable_drm_connector(&conn->output, false);
drm_plane_finish_surface(conn->crtc->primary);
drm_plane_finish_surface(conn->crtc->cursor);
if (conn->crtc->cursor != NULL) {
conn->crtc->cursor->cursor_enabled = false;
}
conn->crtc = NULL;
}
static void realloc_crtcs(struct wlr_drm_backend *drm) {
assert(drm->num_crtcs > 0);
size_t num_outputs = wl_list_length(&drm->outputs);
if (num_outputs == 0) {
return;
}
wlr_log(WLR_DEBUG, "Reallocating CRTCs");
struct wlr_drm_connector *connectors[num_outputs];
uint32_t connector_constraints[num_outputs];
uint32_t previous_match[drm->num_crtcs];
uint32_t new_match[drm->num_crtcs];
for (size_t i = 0; i < drm->num_crtcs; ++i) {
previous_match[i] = UNMATCHED;
}
wlr_log(WLR_DEBUG, "State before reallocation:");
size_t i = 0;
struct wlr_drm_connector *conn;
wl_list_for_each(conn, &drm->outputs, link) {
connectors[i] = conn;
wlr_log(WLR_DEBUG, " '%s' crtc=%d state=%d desired_enabled=%d",
conn->output.name,
conn->crtc ? (int)(conn->crtc - drm->crtcs) : -1,
conn->state, conn->desired_enabled);
if (conn->crtc) {
previous_match[conn->crtc - drm->crtcs] = i;
}
// Only search CRTCs for user-enabled outputs (that are already
// connected or in need of a modeset)
if ((conn->state == WLR_DRM_CONN_CONNECTED ||
conn->state == WLR_DRM_CONN_NEEDS_MODESET) &&
conn->desired_enabled) {
connector_constraints[i] = conn->possible_crtc;
} else {
// Will always fail to match anything
connector_constraints[i] = 0;
}
++i;
}
match_obj(num_outputs, connector_constraints,
drm->num_crtcs, previous_match, new_match);
// Converts our crtc=>connector result into a connector=>crtc one.
ssize_t connector_match[num_outputs];
for (size_t i = 0 ; i < num_outputs; ++i) {
connector_match[i] = -1;
}
for (size_t i = 0; i < drm->num_crtcs; ++i) {
if (new_match[i] != UNMATCHED) {
connector_match[new_match[i]] = i;
}
}
/*
* In the case that we add a new connector (hotplug) and we fail to
* match everything, we prefer to fail the new connector and keep all
* of the old mappings instead.
*/
for (size_t i = 0; i < num_outputs; ++i) {
struct wlr_drm_connector *conn = connectors[i];
if (conn->state == WLR_DRM_CONN_CONNECTED &&
conn->desired_enabled &&
connector_match[i] == -1) {
wlr_log(WLR_DEBUG, "Could not match a CRTC for previously connected output; "
"keeping old configuration");
return;
}
}
wlr_log(WLR_DEBUG, "State after reallocation:");
// Apply new configuration
for (size_t i = 0; i < num_outputs; ++i) {
struct wlr_drm_connector *conn = connectors[i];
bool prev_enabled = conn->crtc;
wlr_log(WLR_DEBUG, " '%s' crtc=%zd state=%d desired_enabled=%d",
conn->output.name,
connector_match[i],
conn->state, conn->desired_enabled);
// We don't need to change anything.
if (prev_enabled && connector_match[i] == conn->crtc - drm->crtcs) {
continue;
}
dealloc_crtc(conn);
if (connector_match[i] == -1) {
if (prev_enabled) {
wlr_log(WLR_DEBUG, "Output has %s lost its CRTC",
conn->output.name);
conn->state = WLR_DRM_CONN_NEEDS_MODESET;
wlr_output_update_enabled(&conn->output, false);
conn->desired_mode = conn->output.current_mode;
wlr_output_update_mode(&conn->output, NULL);
}
continue;
}
conn->crtc = &drm->crtcs[connector_match[i]];
// Only realloc buffers if we have actually been modeset
if (conn->state != WLR_DRM_CONN_CONNECTED) {
continue;
}
struct wlr_drm_mode *mode =
(struct wlr_drm_mode *)conn->output.current_mode;
if (!drm_connector_init_renderer(conn, mode)) {
wlr_log(WLR_ERROR, "Failed to initialize renderer on output %s",
conn->output.name);
wlr_output_update_enabled(&conn->output, false);
continue;
}
wlr_output_damage_whole(&conn->output);
}
}
static uint32_t get_possible_crtcs(int fd, drmModeRes *res,
drmModeConnector *conn, bool is_mst) {
uint32_t ret = 0;
for (int i = 0; i < conn->count_encoders; ++i) {
drmModeEncoder *enc = drmModeGetEncoder(fd, conn->encoders[i]);
if (!enc) {
continue;
}
ret |= enc->possible_crtcs;
drmModeFreeEncoder(enc);
}
// Sometimes DP MST connectors report no encoders, so we'll loop though
// all of the encoders of the MST type instead.
// TODO: See if there is a better solution.
if (!is_mst || ret) {
return ret;
}
for (int i = 0; i < res->count_encoders; ++i) {
drmModeEncoder *enc = drmModeGetEncoder(fd, res->encoders[i]);
if (!enc) {
continue;
}
if (enc->encoder_type == DRM_MODE_ENCODER_DPMST) {
ret |= enc->possible_crtcs;
}
drmModeFreeEncoder(enc);
}
return ret;
}
void scan_drm_connectors(struct wlr_drm_backend *drm) {
/*
* This GPU is not really a modesetting device.
* It's just being used as a renderer.
*/
if (drm->num_crtcs == 0) {
return;
}
wlr_log(WLR_INFO, "Scanning DRM connectors");
drmModeRes *res = drmModeGetResources(drm->fd);
if (!res) {
wlr_log_errno(WLR_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, false, sizeof(seen));
size_t new_outputs_len = 0;
struct wlr_drm_connector *new_outputs[res->count_connectors + 1];
for (int i = 0; i < res->count_connectors; ++i) {
drmModeConnector *drm_conn = drmModeGetConnector(drm->fd,
res->connectors[i]);
if (!drm_conn) {
wlr_log_errno(WLR_ERROR, "Failed to get DRM connector");
continue;
}
drmModeEncoder *curr_enc = drmModeGetEncoder(drm->fd,
drm_conn->encoder_id);
ssize_t 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(WLR_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;
snprintf(wlr_conn->output.name, sizeof(wlr_conn->output.name),
"%s-%"PRIu32, conn_get_name(drm_conn->connector_type),
drm_conn->connector_type_id);
if (curr_enc) {
wlr_conn->old_crtc = drmModeGetCrtc(drm->fd, curr_enc->crtc_id);
}
wl_list_insert(drm->outputs.prev, &wlr_conn->link);
wlr_log(WLR_INFO, "Found connector '%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;
}
// This can only happen *after* hotplug, since we haven't read the
// connector properties yet
if (wlr_conn->props.link_status != 0) {
uint64_t link_status;
if (!get_drm_prop(drm->fd, wlr_conn->id,
wlr_conn->props.link_status, &link_status)) {
wlr_log(WLR_ERROR, "Failed to get link status for '%s'",
wlr_conn->output.name);
continue;
}
if (link_status == DRM_MODE_LINK_STATUS_BAD) {
// We need to reload our list of modes and force a modeset
wlr_log(WLR_INFO, "Bad link for '%s'", wlr_conn->output.name);
drm_connector_cleanup(wlr_conn);
}
}
if (wlr_conn->state == WLR_DRM_CONN_DISCONNECTED &&
drm_conn->connection == DRM_MODE_CONNECTED) {
wlr_log(WLR_INFO, "'%s' connected", wlr_conn->output.name);
wlr_log(WLR_DEBUG, "Current CRTC: %d",
wlr_conn->crtc ? (int)wlr_conn->crtc->id : -1);
wlr_conn->output.phys_width = drm_conn->mmWidth;
wlr_conn->output.phys_height = drm_conn->mmHeight;
wlr_log(WLR_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];
get_drm_connector_props(drm->fd, wlr_conn->id, &wlr_conn->props);
size_t edid_len = 0;
uint8_t *edid = get_drm_prop_blob(drm->fd,
wlr_conn->id, wlr_conn->props.edid, &edid_len);
parse_edid(&wlr_conn->output, edid_len, edid);
free(edid);
struct wlr_output *output = &wlr_conn->output;
char description[128];
snprintf(description, sizeof(description), "%s %s %s (%s)",
output->make, output->model, output->serial, output->name);
wlr_output_set_description(output, description);
wlr_log(WLR_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(WLR_ERROR, "Allocation failed");
continue;
}
if (drm_conn->modes[i].flags & DRM_MODE_FLAG_INTERLACE) {
free(mode);
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);
if (mode->drm_mode.type & DRM_MODE_TYPE_PREFERRED) {
mode->wlr_mode.preferred = true;
}
wlr_log(WLR_INFO, " %"PRId32"x%"PRId32"@%"PRId32" %s",
mode->wlr_mode.width, mode->wlr_mode.height,
mode->wlr_mode.refresh,
mode->wlr_mode.preferred ? "(preferred)" : "");
wl_list_insert(&wlr_conn->output.modes, &mode->wlr_mode.link);
}
size_t path_len;
bool is_mst = false;
char *path = get_drm_prop_blob(drm->fd, wlr_conn->id,
wlr_conn->props.path, &path_len);
if (path_len > 4 && path && strncmp(path, "mst:", 4) == 0) {
is_mst = true;
}
free(path);
wlr_conn->possible_crtc = get_possible_crtcs(drm->fd, res, drm_conn,
is_mst);
if (wlr_conn->possible_crtc == 0) {
wlr_log(WLR_ERROR, "No CRTC possible for connector '%s'",
wlr_conn->output.name);
}
// TODO: this results in connectors being enabled without a mode
// set
wlr_output_update_enabled(&wlr_conn->output, wlr_conn->crtc != NULL);
wlr_conn->desired_enabled = true;
wlr_conn->state = WLR_DRM_CONN_NEEDS_MODESET;
new_outputs[new_outputs_len++] = wlr_conn;
} else if ((wlr_conn->state == WLR_DRM_CONN_CONNECTED ||
wlr_conn->state == WLR_DRM_CONN_NEEDS_MODESET) &&
drm_conn->connection != DRM_MODE_CONNECTED) {
wlr_log(WLR_INFO, "'%s' disconnected", wlr_conn->output.name);
drm_connector_cleanup(wlr_conn);
}
drmModeFreeEncoder(curr_enc);
drmModeFreeConnector(drm_conn);
}
drmModeFreeResources(res);
// Iterate in reverse order because we'll remove items from the list and
// still want indices to remain correct.
struct wlr_drm_connector *conn, *tmp_conn;
size_t index = wl_list_length(&drm->outputs);
wl_list_for_each_reverse_safe(conn, tmp_conn, &drm->outputs, link) {
index--;
if (index >= seen_len || seen[index]) {
continue;
}
wlr_log(WLR_INFO, "'%s' disappeared", conn->output.name);
drm_connector_cleanup(conn);
wlr_output_destroy(&conn->output);
}
realloc_crtcs(drm);
for (size_t i = 0; i < new_outputs_len; ++i) {
struct wlr_drm_connector *conn = new_outputs[i];
wlr_log(WLR_INFO, "Requesting modeset for '%s'",
conn->output.name);
wlr_signal_emit_safe(&drm->backend.events.new_output,
&conn->output);
}
attempt_enable_needs_modeset(drm);
}
static int mhz_to_nsec(int mhz) {
return 1000000000000LL / mhz;
}
static void page_flip_handler(int fd, unsigned seq,
unsigned tv_sec, unsigned tv_usec, unsigned crtc_id, void *data) {
struct wlr_drm_backend *drm = data;
struct wlr_drm_connector *conn = NULL;
struct wlr_drm_connector *search;
wl_list_for_each(search, &drm->outputs, link) {
if (search->crtc && search->crtc->id == crtc_id) {
conn = search;
break;
}
}
if (!conn) {
wlr_log(WLR_DEBUG, "No connector for crtc_id %u", crtc_id);
return;
}
conn->pageflip_pending = false;
if (conn->state != WLR_DRM_CONN_CONNECTED || conn->crtc == NULL) {
return;
}
struct wlr_drm_plane *plane = conn->crtc->primary;
if (plane->queued_fb.type != WLR_DRM_FB_TYPE_NONE) {
drm_fb_move(&plane->current_fb, &plane->queued_fb);
}
if (conn->crtc->cursor &&
conn->crtc->cursor->queued_fb.type != WLR_DRM_FB_TYPE_NONE) {
drm_fb_move(&conn->crtc->cursor->current_fb,
&conn->crtc->cursor->queued_fb);
}
uint32_t present_flags = WLR_OUTPUT_PRESENT_VSYNC |
WLR_OUTPUT_PRESENT_HW_CLOCK | WLR_OUTPUT_PRESENT_HW_COMPLETION;
/* Don't report ZERO_COPY in multi-gpu situations, because we had to copy
* data between the GPUs, even if we were using the direct scanout
* interface.
*/
if (!drm->parent && plane->current_fb.type == WLR_DRM_FB_TYPE_WLR_BUFFER) {
present_flags |= WLR_OUTPUT_PRESENT_ZERO_COPY;
}
struct timespec present_time = {
.tv_sec = tv_sec,
.tv_nsec = tv_usec * 1000,
};
struct wlr_output_event_present present_event = {
/* The DRM backend guarantees that the presentation event will be for
* the last submitted frame. */
.commit_seq = conn->output.commit_seq,
.when = &present_time,
.seq = seq,
.refresh = mhz_to_nsec(conn->output.refresh),
.flags = present_flags,
};
wlr_output_send_present(&conn->output, &present_event);
if (drm->session->active) {
wlr_output_send_frame(&conn->output);
}
}
int handle_drm_event(int fd, uint32_t mask, void *data) {
drmEventContext event = {
.version = 3,
.page_flip_handler2 = page_flip_handler,
};
drmHandleEvent(fd, &event);
return 1;
}
void restore_drm_outputs(struct wlr_drm_backend *drm) {
uint64_t to_close = (UINT64_C(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) {
handle_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 &= ~(UINT64_C(1) << i);
}
i++;
}
}
if (to_close) {
wlr_log(WLR_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);
drmModeSetCursor(drm->fd, crtc->crtc_id, 0, 0, 0);
}
}
static void drm_connector_cleanup(struct wlr_drm_connector *conn) {
if (!conn) {
return;
}
switch (conn->state) {
case WLR_DRM_CONN_CONNECTED:
case WLR_DRM_CONN_CLEANUP:
conn->output.current_mode = NULL;
conn->desired_mode = NULL;
struct wlr_drm_mode *mode, *tmp;
wl_list_for_each_safe(mode, tmp, &conn->output.modes, wlr_mode.link) {
wl_list_remove(&mode->wlr_mode.link);
free(mode);
}
conn->output.enabled = false;
conn->output.width = conn->output.height = conn->output.refresh = 0;
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));
if (conn->output.idle_frame != NULL) {
wl_event_source_remove(conn->output.idle_frame);
conn->output.idle_frame = NULL;
}
conn->output.needs_frame = false;
conn->output.frame_pending = false;
/* Fallthrough */
case WLR_DRM_CONN_NEEDS_MODESET:
wlr_log(WLR_INFO, "Emitting destruction signal for '%s'",
conn->output.name);
dealloc_crtc(conn);
conn->possible_crtc = 0;
conn->desired_mode = NULL;
conn->pageflip_pending = false;
wlr_signal_emit_safe(&conn->output.events.destroy, &conn->output);
break;
case WLR_DRM_CONN_DISCONNECTED:
break;
}
conn->state = WLR_DRM_CONN_DISCONNECTED;
}