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#include <assert.h>
#include <stdlib.h>
#include <wlr/util/log.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include "backend/drm/drm.h"
#include "backend/drm/iface.h"
#include "backend/drm/util.h"
static bool legacy_fb_props_match(struct wlr_drm_fb *fb1,
struct wlr_drm_fb *fb2) {
struct wlr_dmabuf_attributes dmabuf1 = {0}, dmabuf2 = {0};
if (!wlr_buffer_get_dmabuf(fb1->wlr_buf, &dmabuf1) ||
!wlr_buffer_get_dmabuf(fb2->wlr_buf, &dmabuf2)) {
return false;
}
if (dmabuf1.width != dmabuf2.width ||
dmabuf1.height != dmabuf2.height ||
dmabuf1.format != dmabuf2.format ||
dmabuf1.modifier != dmabuf2.modifier ||
dmabuf1.n_planes != dmabuf2.n_planes) {
return false;
}
for (int i = 0; i < dmabuf1.n_planes; i++) {
if (dmabuf1.stride[i] != dmabuf2.stride[i] ||
dmabuf1.offset[i] != dmabuf2.offset[i]) {
return false;
}
}
return true;
}
static bool legacy_crtc_test(struct wlr_drm_connector *conn,
const struct wlr_drm_connector_state *state) {
struct wlr_drm_crtc *crtc = conn->crtc;
if ((state->base->committed & WLR_OUTPUT_STATE_BUFFER) && !state->modeset) {
struct wlr_drm_fb *pending_fb = state->primary_fb;
struct wlr_drm_fb *prev_fb = crtc->primary->queued_fb;
if (!prev_fb) {
prev_fb = crtc->primary->current_fb;
}
/* Legacy is only guaranteed to be able to display a FB if it's been
* allocated the same way as the previous one. */
if (prev_fb != NULL && !legacy_fb_props_match(prev_fb, pending_fb)) {
wlr_drm_conn_log(conn, WLR_DEBUG,
"Cannot change scan-out buffer parameters with legacy KMS API");
return false;
}
}
return true;
}
static bool legacy_crtc_commit(struct wlr_drm_connector *conn,
const struct wlr_drm_connector_state *state,
uint32_t flags, bool test_only) {
if (!legacy_crtc_test(conn, state)) {
return false;
}
if (test_only) {
return true;
}
struct wlr_drm_backend *drm = conn->backend;
struct wlr_output *output = &conn->output;
struct wlr_drm_crtc *crtc = conn->crtc;
struct wlr_drm_plane *cursor = crtc->cursor;
uint32_t fb_id = 0;
if (state->active) {
if (state->primary_fb == NULL) {
wlr_log(WLR_ERROR, "%s: failed to acquire primary FB",
conn->output.name);
return false;
}
fb_id = state->primary_fb->id;
}
if (state->modeset) {
uint32_t *conns = NULL;
size_t conns_len = 0;
drmModeModeInfo *mode = NULL;
if (state->active) {
conns = &conn->id;
conns_len = 1;
mode = (drmModeModeInfo *)&state->mode;
}
uint32_t dpms = state->active ? DRM_MODE_DPMS_ON : DRM_MODE_DPMS_OFF;
if (drmModeConnectorSetProperty(drm->fd, conn->id, conn->props.dpms,
dpms) != 0) {
wlr_drm_conn_log_errno(conn, WLR_ERROR,
"Failed to set DPMS property");
return false;
}
if (drmModeSetCrtc(drm->fd, crtc->id, fb_id, 0, 0,
conns, conns_len, mode)) {
wlr_drm_conn_log_errno(conn, WLR_ERROR, "Failed to set CRTC");
return false;
}
}
if (state->base->committed & WLR_OUTPUT_STATE_GAMMA_LUT) {
if (!drm_legacy_crtc_set_gamma(drm, crtc,
state->base->gamma_lut_size, state->base->gamma_lut)) {
return false;
}
}
if (state->base->committed & WLR_OUTPUT_STATE_ADAPTIVE_SYNC_ENABLED) {
if (!drm_connector_supports_vrr(conn)) {
return false;
}
if (drmModeObjectSetProperty(drm->fd, crtc->id, DRM_MODE_OBJECT_CRTC,
crtc->props.vrr_enabled,
state->base->adaptive_sync_enabled) != 0) {
wlr_drm_conn_log_errno(conn, WLR_ERROR,
"drmModeObjectSetProperty(VRR_ENABLED) failed");
return false;
}
output->adaptive_sync_status = state->base->adaptive_sync_enabled ?
WLR_OUTPUT_ADAPTIVE_SYNC_ENABLED :
WLR_OUTPUT_ADAPTIVE_SYNC_DISABLED;
wlr_drm_conn_log(conn, WLR_DEBUG, "VRR %s",
state->base->adaptive_sync_enabled ? "enabled" : "disabled");
}
if (cursor != NULL && drm_connector_is_cursor_visible(conn)) {
struct wlr_drm_fb *cursor_fb = get_next_cursor_fb(conn);
if (cursor_fb == NULL) {
wlr_drm_conn_log(conn, WLR_DEBUG, "Failed to acquire cursor FB");
return false;
}
drmModeFB *drm_fb = drmModeGetFB(drm->fd, cursor_fb->id);
if (drm_fb == NULL) {
wlr_drm_conn_log_errno(conn, WLR_DEBUG, "Failed to get cursor "
"BO handle: drmModeGetFB failed");
return false;
}
uint32_t cursor_handle = drm_fb->handle;
uint32_t cursor_width = drm_fb->width;
uint32_t cursor_height = drm_fb->height;
drmModeFreeFB(drm_fb);
int ret = drmModeSetCursor(drm->fd, crtc->id, cursor_handle,
cursor_width, cursor_height);
int set_cursor_errno = errno;
if (drmCloseBufferHandle(drm->fd, cursor_handle) != 0) {
wlr_log_errno(WLR_ERROR, "drmCloseBufferHandle failed");
}
if (ret != 0) {
wlr_drm_conn_log(conn, WLR_DEBUG, "drmModeSetCursor failed: %s",
strerror(set_cursor_errno));
return false;
}
if (drmModeMoveCursor(drm->fd,
crtc->id, conn->cursor_x, conn->cursor_y) != 0) {
wlr_drm_conn_log_errno(conn, WLR_ERROR, "drmModeMoveCursor failed");
return false;
}
} else {
if (drmModeSetCursor(drm->fd, crtc->id, 0, 0, 0)) {
wlr_drm_conn_log_errno(conn, WLR_DEBUG, "drmModeSetCursor failed");
return false;
}
}
if (flags & DRM_MODE_PAGE_FLIP_EVENT) {
if (drmModePageFlip(drm->fd, crtc->id, fb_id,
DRM_MODE_PAGE_FLIP_EVENT, drm)) {
wlr_drm_conn_log_errno(conn, WLR_ERROR, "drmModePageFlip failed");
return false;
}
}
return true;
}
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;
}
}
bool drm_legacy_crtc_set_gamma(struct wlr_drm_backend *drm,
struct wlr_drm_crtc *crtc, size_t size, uint16_t *lut) {
uint16_t *linear_lut = NULL;
if (size == 0) {
// The legacy interface doesn't offer a way to reset the gamma LUT
size = drm_crtc_get_gamma_lut_size(drm, crtc);
if (size == 0) {
return false;
}
linear_lut = malloc(3 * size * sizeof(uint16_t));
if (linear_lut == NULL) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
return false;
}
fill_empty_gamma_table(size, linear_lut, linear_lut + size,
linear_lut + 2 * size);
lut = linear_lut;
}
uint16_t *r = lut, *g = lut + size, *b = lut + 2 * size;
if (drmModeCrtcSetGamma(drm->fd, crtc->id, size, r, g, b) != 0) {
wlr_log_errno(WLR_ERROR, "Failed to set gamma LUT on CRTC %"PRIu32,
crtc->id);
free(linear_lut);
return false;
}
free(linear_lut);
return true;
}
const struct wlr_drm_interface legacy_iface = {
.crtc_commit = legacy_crtc_commit,
};
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