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backend/drm: clip FB damage

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The kernel complains when the damage exceeds the FB bounds:

    [73850.448326] i915 0000:00:02.0: [drm:drm_atomic_check_only] [PLANE:31:plane 1A] invalid damage clip 0 0 2147483647 2147483647

Make the DRM backend behave like the Wayland one and allow compositors
to damage (0, 0, INT32_MAX, INT32_MAX) to repaint everything without
needing to know the exact buffer size.

Closes: https://github.com/swaywm/sway/issues/7632
This commit is contained in:
Simon Ser 2023-06-12 12:13:21 +02:00 committed by Kenny Levinsen
parent a09bb1314d
commit 4339c37f99
3 changed files with 34 additions and 15 deletions
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36
backend/drm/atomic.c
View File

@ -143,6 +143,32 @@ bool create_gamma_lut_blob(struct wlr_drm_backend *drm,
return true; return true;
} }
bool create_fb_damage_clips_blob(struct wlr_drm_backend *drm,
struct wlr_drm_fb *fb, const pixman_region32_t *damage, uint32_t *blob_id) {
if (!pixman_region32_not_empty(damage)) {
*blob_id = 0;
return true;
}
int width = fb->wlr_buf->width;
int height = fb->wlr_buf->height;
pixman_region32_t clipped;
pixman_region32_init(&clipped);
pixman_region32_intersect_rect(&clipped, damage, 0, 0, width, height);
int rects_len;
const pixman_box32_t *rects = pixman_region32_rectangles(&clipped, &rects_len);
int ret = drmModeCreatePropertyBlob(drm->fd, rects, sizeof(*rects) * rects_len, blob_id);
pixman_region32_fini(&clipped);
if (ret != 0) {
wlr_log_errno(WLR_ERROR, "Failed to create FB_DAMAGE_CLIPS property blob");
return false;
}
return true;
}
static uint64_t max_bpc_for_format(uint32_t format) { static uint64_t max_bpc_for_format(uint32_t format) {
switch (format) { switch (format) {
case DRM_FORMAT_XRGB2101010: case DRM_FORMAT_XRGB2101010:
@ -271,15 +297,9 @@ static bool atomic_crtc_commit(struct wlr_drm_connector *conn,
uint32_t fb_damage_clips = 0; uint32_t fb_damage_clips = 0;
if ((state->base->committed & WLR_OUTPUT_STATE_DAMAGE) && if ((state->base->committed & WLR_OUTPUT_STATE_DAMAGE) &&
pixman_region32_not_empty(&state->base->damage) &&
crtc->primary->props.fb_damage_clips != 0) { crtc->primary->props.fb_damage_clips != 0) {
int rects_len; create_fb_damage_clips_blob(drm, state->primary_fb,
const pixman_box32_t *rects = &state->base->damage, &fb_damage_clips);
pixman_region32_rectangles(&state->base->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 = bool prev_vrr_enabled =

9
backend/drm/libliftoff.c
View File

@ -324,14 +324,9 @@ static bool crtc_commit(struct wlr_drm_connector *conn,
uint32_t fb_damage_clips = 0; uint32_t fb_damage_clips = 0;
if ((state->base->committed & WLR_OUTPUT_STATE_DAMAGE) && if ((state->base->committed & WLR_OUTPUT_STATE_DAMAGE) &&
pixman_region32_not_empty(&state->base->damage) &&
crtc->primary->props.fb_damage_clips != 0) { crtc->primary->props.fb_damage_clips != 0) {
int rects_len; create_fb_damage_clips_blob(drm, state->primary_fb,
const pixman_box32_t *rects = pixman_region32_rectangles(&state->base->damage, &rects_len); &state->base->damage, &fb_damage_clips);
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 = bool prev_vrr_enabled =

4
include/backend/drm/iface.h
View File

@ -3,6 +3,7 @@
#include <stdbool.h> #include <stdbool.h>
#include <stdint.h> #include <stdint.h>
#include <pixman.h>
#include <xf86drm.h> #include <xf86drm.h>
#include <xf86drmMode.h> #include <xf86drmMode.h>
@ -10,6 +11,7 @@ struct wlr_drm_backend;
struct wlr_drm_connector; struct wlr_drm_connector;
struct wlr_drm_crtc; struct wlr_drm_crtc;
struct wlr_drm_connector_state; struct wlr_drm_connector_state;
struct wlr_drm_fb;
// Used to provide atomic or legacy DRM functions // Used to provide atomic or legacy DRM functions
struct wlr_drm_interface { struct wlr_drm_interface {
@ -33,5 +35,7 @@ bool create_mode_blob(struct wlr_drm_backend *drm,
const struct wlr_drm_connector_state *state, uint32_t *blob_id); const struct wlr_drm_connector_state *state, uint32_t *blob_id);
bool create_gamma_lut_blob(struct wlr_drm_backend *drm, bool create_gamma_lut_blob(struct wlr_drm_backend *drm,
size_t size, const uint16_t *lut, uint32_t *blob_id); size_t size, const uint16_t *lut, uint32_t *blob_id);
bool create_fb_damage_clips_blob(struct wlr_drm_backend *drm,
struct wlr_drm_fb *fb, const pixman_region32_t *damage, uint32_t *blob_id);
#endif #endif