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drm.c
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drm.c
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#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];
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);
}
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 make_drm_surface_current(&conn->crtc->primary->surf, buffer_age);
}
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;
pixman_region32_t *damage = NULL;
if (output->pending.committed & WLR_OUTPUT_STATE_DAMAGE) {
damage = &output->pending.damage;
}
struct gbm_bo *bo;
uint32_t fb_id = 0;
assert(output->pending.committed & WLR_OUTPUT_STATE_BUFFER);
switch (output->pending.buffer_type) {
case WLR_OUTPUT_STATE_BUFFER_RENDER:
bo = swap_drm_surface_buffers(&plane->surf, damage);
if (bo == NULL) {
wlr_log(WLR_ERROR, "swap_drm_surface_buffers failed");
return false;
}
if (drm->parent) {
bo = copy_drm_surface_mgpu(&plane->mgpu_surf, bo);
if (bo == NULL) {
wlr_log(WLR_ERROR, "copy_drm_surface_mgpu failed");
return false;
}
}
fb_id = get_fb_for_bo(bo, plane->drm_format, drm->addfb2_modifiers);
if (fb_id == 0) {
wlr_log(WLR_ERROR, "get_fb_for_bo failed");
return false;
}
break;
case WLR_OUTPUT_STATE_BUFFER_SCANOUT:
bo = import_gbm_bo(&drm->renderer, &conn->pending_dmabuf);
if (bo == NULL) {
wlr_log(WLR_ERROR, "import_gbm_bo failed");
return false;
}
if (conn->pending_bo != NULL) {
gbm_bo_destroy(conn->pending_bo);
}
conn->pending_bo = bo;
fb_id = get_fb_for_bo(bo, gbm_bo_get_format(bo), drm->addfb2_modifiers);
if (fb_id == 0) {
wlr_log(WLR_ERROR, "get_fb_for_bo failed");
return false;
}
break;
}
if (conn->pageflip_pending) {
wlr_log(WLR_ERROR, "Skipping pageflip on output '%s'", conn->output.name);
return false;
}
if (!drm->iface->crtc_pageflip(drm, conn, crtc, fb_id, NULL)) {
return false;
}
conn->pageflip_pending = true;
if (output->pending.buffer_type == WLR_OUTPUT_STATE_BUFFER_SCANOUT) {
wlr_buffer_unref(conn->pending_buffer);
conn->pending_buffer = wlr_buffer_ref(output->pending.buffer);
}
wlr_output_update_enabled(output, true);
return true;
}
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->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;
}
}
if (output->pending.committed & WLR_OUTPUT_STATE_ENABLED) {
if (!enable_drm_connector(output, output->pending.enabled)) {
return false;
}
}
// 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;
}
}
return true;
}
static void fill_empty_gamma_table(size_t size,
uint16_t *r, uint16_t *g, uint16_t *b) {
for (uint32_t i = 0; i < size; ++i) {
uint16_t val = (uint32_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);
if (conn->crtc) {
return drm->iface->crtc_get_gamma_size(drm, conn->crtc);
}
return 0;
}
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);
struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
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));
}
bool ok = drm->iface->crtc_set_gamma(drm, conn->crtc, size, _r, _g, _b);
if (ok) {
wlr_output_update_needs_frame(output);
free(conn->crtc->gamma_table);
conn->crtc->gamma_table = gamma_table;
conn->crtc->gamma_table_size = size;
} else {
free(gamma_table);
}
return ok;
}
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);
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 wlr_drm_surface *surf = &plane->surf;
return export_drm_bo(surf->back, attribs);
}
static bool drm_connector_pageflip_renderer(struct wlr_drm_connector *conn,
struct wlr_drm_mode *mode) {
struct wlr_drm_backend *drm =
get_drm_backend_from_backend(conn->output.backend);
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;
}
struct wlr_drm_plane *plane = crtc->primary;
struct gbm_bo *bo = get_drm_surface_front(
drm->parent ? &plane->mgpu_surf : &plane->surf);
uint32_t fb_id = get_fb_for_bo(bo, plane->drm_format, drm->addfb2_modifiers);
return drm->iface->crtc_pageflip(drm, conn, crtc, fb_id, &mode->drm_mode);
}
static void drm_connector_start_renderer(struct wlr_drm_connector *conn) {
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;
if (drm_connector_pageflip_renderer(conn, 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);
}
}
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;
int width = mode->wlr_mode.width;
int height = mode->wlr_mode.height;
uint32_t format = drm->renderer.gbm_format;
if (!init_drm_plane_surfaces(plane, drm, width, height, format, true) ||
!drm_connector_pageflip_renderer(conn, mode)) {
// 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");
finish_drm_surface(&plane->surf);
finish_drm_surface(&plane->mgpu_surf);
if (!init_drm_plane_surfaces(plane, drm, width, height, format, false)) {
return false;
}
if (!drm_connector_pageflip_renderer(conn, mode)) {
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);
}
bool ok = drm->iface->conn_enable(drm, conn, enable);
if (!ok) {
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, int32_t 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) {
// We don't have a real cursor plane, so we make a fake one
plane = calloc(1, sizeof(*plane));
if (!plane) {
wlr_log_errno(WLR_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 (!drm->parent) {
if (!init_drm_surface(&plane->surf, &drm->renderer, w, h,
drm->renderer.gbm_format, NULL,
GBM_BO_USE_LINEAR | GBM_BO_USE_SCANOUT)) {
wlr_log(WLR_ERROR, "Cannot allocate cursor resources");
return false;
}
} else {
if (!init_drm_surface(&plane->surf, &drm->parent->renderer, w, h,
drm->parent->renderer.gbm_format, NULL,
GBM_BO_USE_LINEAR)) {
wlr_log(WLR_ERROR, "Cannot allocate cursor resources");
return false;
}
if (!init_drm_surface(&plane->mgpu_surf, &drm->renderer, w, h,
drm->renderer.gbm_format, NULL,
GBM_BO_USE_LINEAR | GBM_BO_USE_SCANOUT)) {
wlr_log(WLR_ERROR, "Cannot allocate cursor resources");
return false;
}
}
}
wlr_matrix_projection(plane->matrix, 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;
if (!drm->iface->crtc_move_cursor(drm, conn->crtc, conn->cursor_x,
conn->cursor_y)) {
return false;
}
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;
}
make_drm_surface_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, plane->matrix);
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);
swap_drm_surface_buffers(&plane->surf, NULL);
plane->cursor_enabled = true;
}
if (!drm->session->active) {
return true; // will be committed when session is resumed
}
struct gbm_bo *bo = plane->cursor_enabled ? plane->surf.back : NULL;
if (bo && drm->parent) {
bo = copy_drm_surface_mgpu(&plane->mgpu_surf, bo);
}
if (bo) {
// 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://bugs.freedesktop.org/show_bug.cgi?id=109631
// The render operations can be waited for using:
glFinish();
}
bool ok = drm->iface->crtc_set_cursor(drm, crtc, bo);
if (ok) {
wlr_output_update_needs_frame(output);
}
return ok;
}
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);
struct wlr_drm_backend *drm = get_drm_backend_from_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, &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;
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_frame(output);
}
return ok;
}
static bool drm_connector_schedule_frame(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);
if (!drm->session->active) {
return false;
}
// We need to figure out where we are in the vblank cycle
// TODO: try using drmWaitVBlank and fallback to pageflipping
struct wlr_drm_crtc *crtc = conn->crtc;
if (!crtc) {
return false;
}
struct wlr_drm_plane *plane = crtc->primary;
struct gbm_bo *bo = plane->surf.back;
if (!bo) {
// We haven't swapped buffers yet -- can't do a pageflip
wlr_output_send_frame(output);
return true;
}
if (drm->parent) {
bo = copy_drm_surface_mgpu(&plane->mgpu_surf, bo);
}
if (conn->pageflip_pending) {
wlr_log(WLR_ERROR, "Skipping pageflip on output '%s'",
conn->output.name);
return true;
}
uint32_t fb_id = get_fb_for_bo(bo, plane->drm_format, drm->addfb2_modifiers);
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 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 drm_connector_attach_buffer(struct wlr_output *output,
struct wlr_buffer *buffer) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
if (!drm->session->active) {
return false;