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drm/backend: add support for cursor hotspots

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Enables DRM_CLIENT_CAP_CURSOR_PLANE_HOTSPOT and sets the cursor hotspots on the
cursor plane so virtualized drivers can accelerate mouse movement.

Closes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3776
This commit is contained in:
Ian Forbes 2024-03-19 16:20:32 -05:00
parent 94c31b824c
commit e3bd318547
4 changed files with 20 additions and 1 deletions
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10
backend/drm/atomic.c
View file

@ -353,6 +353,10 @@ static void set_plane_props(struct atomic *atom, struct wlr_drm_backend *drm,
atomic_add(atom, id, props->crtc_y, (uint64_t)y);
}
static bool supports_cursor_hotspots(const struct wlr_drm_plane* plane) {
return plane->props.hotspot_x && plane->props.hotspot_y;
}
static void atomic_connector_add(struct atomic *atom,
const struct wlr_drm_connector_state *state, bool modeset) {
struct wlr_drm_connector *conn = state->connector;
@ -391,6 +395,12 @@ static void atomic_connector_add(struct atomic *atom,
if (drm_connector_is_cursor_visible(conn)) {
set_plane_props(atom, drm, crtc->cursor, state->cursor_fb,
crtc->id, conn->cursor_x, conn->cursor_y);
if (supports_cursor_hotspots(crtc->cursor)) {
atomic_add(atom, crtc->cursor->id,
crtc->cursor->props.hotspot_x, conn->cursor_hotspot_x);
atomic_add(atom, crtc->cursor->id,
crtc->cursor->props.hotspot_y, conn->cursor_hotspot_y);
}
} else {
plane_disable(atom, crtc->cursor);
}

5
backend/drm/drm.c
View file

@ -111,6 +111,11 @@ bool check_drm_features(struct wlr_drm_backend *drm) {
wlr_log(WLR_DEBUG, "Using atomic DRM interface");
drm->iface = &atomic_iface;
}
#ifdef DRM_CLIENT_CAP_CURSOR_PLANE_HOTSPOT
if (drm->iface == &atomic_iface && drmSetClientCap(drm->fd, DRM_CLIENT_CAP_CURSOR_PLANE_HOTSPOT, 1) == 0) {
wlr_log(WLR_INFO, "DRM_CLIENT_CAP_CURSOR_PLANE_HOTSPOT supported");
}
#endif
if (drm->iface == &legacy_iface) {
drm->supports_tearing_page_flips = drmGetCap(drm->fd, DRM_CAP_ASYNC_PAGE_FLIP, &cap) == 0 && cap == 1;

2
backend/drm/properties.c
View file

@ -53,6 +53,8 @@ static const struct prop_info plane_info[] = {
{ "CRTC_Y", INDEX(crtc_y) },
{ "FB_DAMAGE_CLIPS", INDEX(fb_damage_clips) },
{ "FB_ID", INDEX(fb_id) },
{ "HOTSPOT_X", INDEX(hotspot_x) },
{ "HOTSPOT_Y", INDEX(hotspot_y) },
{ "IN_FORMATS", INDEX(in_formats) },
{ "SRC_H", INDEX(src_h) },
{ "SRC_W", INDEX(src_w) },

4
include/backend/drm/properties.h
View file

@ -65,8 +65,10 @@ union wlr_drm_plane_props {
uint32_t fb_id;
uint32_t crtc_id;
uint32_t fb_damage_clips;
uint32_t hotspot_x;
uint32_t hotspot_y;
};
uint32_t props[14];
uint32_t props[16];
};
bool get_drm_connector_props(int fd, uint32_t id,