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backend/drm: add support for FB_DAMAGE_CLIPS

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This allows the kernel to access our buffer damage. Some drivers
can take advantage of this, e.g. for PSR2 panels (Panel Self
Refresh) or for transfer over USB.

Closes: https://github.com/swaywm/wlroots/issues/1267
This commit is contained in:
Simon Ser 2021-07-21 15:58:01 +02:00
parent 109405729b
commit 46c42e55c6
3 changed files with 24 additions and 1 deletions
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21
backend/drm/atomic.c
View file

@ -201,6 +201,18 @@ static bool atomic_crtc_commit(struct wlr_drm_connector *conn,
}
}
uint32_t fb_damage_clips = 0;
if ((state->committed & WLR_OUTPUT_STATE_DAMAGE) &&
crtc->primary->props.fb_damage_clips != 0) {
int rects_len;
const pixman_box32_t *rects = pixman_region32_rectangles(
(pixman_region32_t *)&state->damage, &rects_len);
if (drmModeCreatePropertyBlob(drm->fd, rects,
sizeof(*rects) * rects_len, &fb_damage_clips) != 0) {
wlr_log_errno(WLR_ERROR, "Failed to create FB_DAMAGE_CLIPS property blob");
}
}
bool prev_vrr_enabled =
output->adaptive_sync_status == WLR_OUTPUT_ADAPTIVE_SYNC_ENABLED;
bool vrr_enabled = prev_vrr_enabled;
@ -235,6 +247,10 @@ static bool atomic_crtc_commit(struct wlr_drm_connector *conn,
atomic_add(&atom, crtc->id, crtc->props.vrr_enabled, vrr_enabled);
}
set_plane_props(&atom, drm, crtc->primary, crtc->id, 0, 0);
if (crtc->primary->props.fb_damage_clips != 0) {
atomic_add(&atom, crtc->primary->id,
crtc->primary->props.fb_damage_clips, fb_damage_clips);
}
if (crtc->cursor) {
if (drm_connector_is_cursor_visible(conn)) {
set_plane_props(&atom, drm, crtc->cursor, crtc->id,
@ -269,6 +285,11 @@ static bool atomic_crtc_commit(struct wlr_drm_connector *conn,
rollback_blob(drm, &crtc->gamma_lut, gamma_lut);
}
if (fb_damage_clips != 0 &&
drmModeDestroyPropertyBlob(drm->fd, fb_damage_clips) != 0) {
wlr_log_errno(WLR_ERROR, "Failed to destroy FB_DAMAGE_CLIPS property blob");
}
return ok;
}

1
backend/drm/properties.c
View file

@ -47,6 +47,7 @@ static const struct prop_info plane_info[] = {
{ "CRTC_W", INDEX(crtc_w) },
{ "CRTC_X", INDEX(crtc_x) },
{ "CRTC_Y", INDEX(crtc_y) },
{ "FB_DAMAGE_CLIPS", INDEX(fb_damage_clips) },
{ "FB_ID", INDEX(fb_id) },
{ "IN_FORMATS", INDEX(in_formats) },
{ "SRC_H", INDEX(src_h) },

3
include/backend/drm/properties.h
View file

@ -59,8 +59,9 @@ union wlr_drm_plane_props {
uint32_t crtc_h;
uint32_t fb_id;
uint32_t crtc_id;
uint32_t fb_damage_clips;
};
uint32_t props[13];
uint32_t props[14];
};
bool get_drm_connector_props(int fd, uint32_t id,