More DRM stuff, untested as of now, lifted from kmscube.
This commit is contained in:
Pierre-Loup A. Griffais
Pierre-Loup A. Griffais
parent
487f9887a3
commit
66511514d4
2 changed files with 255 additions and 0 deletions
234
src/drm.c
234
src/drm.c
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@ -9,6 +9,7 @@
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include <stdlib.h>
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#define C_SIDE
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@ -104,6 +105,64 @@ static int find_drm_device(drmModeRes **resources)
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return fd;
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}
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/* Pick a plane.. something that at a minimum can be connected to
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* the chosen crtc, but prefer primary plane.
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*
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* Seems like there is some room for a drmModeObjectGetNamedProperty()
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* type helper in libdrm..
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*/
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static int get_plane_id(struct drm_t *drm)
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{
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drmModePlaneResPtr plane_resources;
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uint32_t i, j;
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int ret = -EINVAL;
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int found_primary = 0;
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plane_resources = drmModeGetPlaneResources(drm->fd);
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if (!plane_resources) {
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printf("drmModeGetPlaneResources failed: %s\n", strerror(errno));
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return -1;
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}
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for (i = 0; (i < plane_resources->count_planes) && !found_primary; i++) {
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uint32_t id = plane_resources->planes[i];
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drmModePlanePtr plane = drmModeGetPlane(drm->fd, id);
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if (!plane) {
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printf("drmModeGetPlane(%u) failed: %s\n", id, strerror(errno));
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continue;
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}
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if (plane->possible_crtcs & (1 << drm->crtc_index)) {
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drmModeObjectPropertiesPtr props =
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drmModeObjectGetProperties(drm->fd, id, DRM_MODE_OBJECT_PLANE);
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/* primary or not, this plane is good enough to use: */
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ret = id;
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for (j = 0; j < props->count_props; j++) {
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drmModePropertyPtr p =
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drmModeGetProperty(drm->fd, props->props[j]);
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if ((strcmp(p->name, "type") == 0) &&
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(props->prop_values[j] == DRM_PLANE_TYPE_PRIMARY)) {
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/* found our primary plane, lets use that: */
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found_primary = 1;
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}
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drmModeFreeProperty(p);
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}
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drmModeFreeObjectProperties(props);
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}
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drmModeFreePlane(plane);
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}
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drmModeFreePlaneResources(plane_resources);
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return ret;
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}
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int init_drm(struct drm_t *drm, const char *device, const char *mode_str, unsigned int vrefresh)
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{
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drmModeRes *resources;
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@ -220,5 +279,180 @@ int init_drm(struct drm_t *drm, const char *device, const char *mode_str, unsign
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drm->connector_id = connector->connector_id;
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drmSetClientCap(drm->fd, DRM_CLIENT_CAP_ATOMIC, 1);
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drm->plane_id = get_plane_id( &g_DRM );
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if ( drm->plane_id == 0 )
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{
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printf("could not find a suitable plane\n");
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return -1;
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}
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drm->plane = calloc(1, sizeof(*drm->plane));
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drm->crtc = calloc(1, sizeof(*drm->crtc));
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drm->connector = calloc(1, sizeof(*drm->connector));
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#define get_resource(type, Type, id) do { \
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drm->type->type = drmModeGet##Type(drm->fd, id); \
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if (!drm->type->type) { \
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printf("could not get %s %i: %s\n", \
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#type, id, strerror(errno)); \
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return -1; \
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} \
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} while (0)
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get_resource(plane, Plane, drm->plane_id);
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get_resource(crtc, Crtc, drm->crtc_id);
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get_resource(connector, Connector, drm->connector_id);
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#define get_properties(type, TYPE, id) do { \
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uint32_t i; \
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drm->type->props = drmModeObjectGetProperties(drm->fd, \
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id, DRM_MODE_OBJECT_##TYPE); \
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if (!drm->type->props) { \
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printf("could not get %s %u properties: %s\n", \
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#type, id, strerror(errno)); \
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return -1; \
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} \
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drm->type->props_info = calloc(drm->type->props->count_props, \
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sizeof(*drm->type->props_info)); \
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for (i = 0; i < drm->type->props->count_props; i++) { \
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drm->type->props_info[i] = drmModeGetProperty(drm->fd, \
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drm->type->props->props[i]); \
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} \
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} while (0)
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get_properties(plane, PLANE, drm->plane_id);
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get_properties(crtc, CRTC, drm->crtc_id);
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get_properties(connector, CONNECTOR, drm->connector_id);
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return 0;
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}
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static int add_connector_property(struct drm_t *drm, drmModeAtomicReq *req,
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uint32_t obj_id, const char *name,
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uint64_t value)
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{
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struct connector *obj = drm->connector;
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unsigned int i;
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int prop_id = 0;
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for (i = 0 ; i < obj->props->count_props ; i++) {
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if (strcmp(obj->props_info[i]->name, name) == 0) {
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prop_id = obj->props_info[i]->prop_id;
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break;
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}
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}
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if (prop_id < 0) {
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printf("no connector property: %s\n", name);
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return -EINVAL;
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}
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return drmModeAtomicAddProperty(req, obj_id, prop_id, value);
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}
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static int add_crtc_property(struct drm_t *drm, drmModeAtomicReq *req,
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uint32_t obj_id, const char *name,
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uint64_t value)
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{
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struct crtc *obj = drm->crtc;
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unsigned int i;
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int prop_id = -1;
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for (i = 0 ; i < obj->props->count_props ; i++) {
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if (strcmp(obj->props_info[i]->name, name) == 0) {
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prop_id = obj->props_info[i]->prop_id;
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break;
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}
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}
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if (prop_id < 0) {
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printf("no crtc property: %s\n", name);
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return -EINVAL;
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}
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return drmModeAtomicAddProperty(req, obj_id, prop_id, value);
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}
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static int add_plane_property(struct drm_t *drm, drmModeAtomicReq *req,
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uint32_t obj_id, const char *name,
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uint64_t value)
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{
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struct plane *obj = drm->plane;
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unsigned int i;
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int prop_id = -1;
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for (i = 0 ; i < obj->props->count_props ; i++) {
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if (strcmp(obj->props_info[i]->name, name) == 0) {
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prop_id = obj->props_info[i]->prop_id;
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break;
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}
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}
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if (prop_id < 0) {
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printf("no plane property: %s\n", name);
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return -EINVAL;
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}
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return drmModeAtomicAddProperty(req, obj_id, prop_id, value);
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}
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int drm_atomic_commit(struct drm_t *drm, uint32_t fb_id, uint32_t flags)
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{
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drmModeAtomicReq *req;
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uint32_t plane_id = drm->plane->plane->plane_id;
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uint32_t blob_id;
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int ret;
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req = drmModeAtomicAlloc();
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if (flags & DRM_MODE_ATOMIC_ALLOW_MODESET) {
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if (add_connector_property(drm, req, drm->connector_id, "CRTC_ID",
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drm->crtc_id) < 0)
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return -1;
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if (drmModeCreatePropertyBlob(drm->fd, drm->mode, sizeof(*drm->mode),
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&blob_id) != 0)
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return -1;
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if (add_crtc_property(drm, req, drm->crtc_id, "MODE_ID", blob_id) < 0)
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return -1;
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if (add_crtc_property(drm, req, drm->crtc_id, "ACTIVE", 1) < 0)
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return -1;
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}
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add_plane_property(drm, req, plane_id, "FB_ID", fb_id);
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add_plane_property(drm, req, plane_id, "CRTC_ID", drm->crtc_id);
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add_plane_property(drm, req, plane_id, "SRC_X", 0);
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add_plane_property(drm, req, plane_id, "SRC_Y", 0);
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add_plane_property(drm, req, plane_id, "SRC_W", drm->mode->hdisplay << 16);
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add_plane_property(drm, req, plane_id, "SRC_H", drm->mode->vdisplay << 16);
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add_plane_property(drm, req, plane_id, "CRTC_X", 0);
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add_plane_property(drm, req, plane_id, "CRTC_Y", 0);
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add_plane_property(drm, req, plane_id, "CRTC_W", drm->mode->hdisplay);
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add_plane_property(drm, req, plane_id, "CRTC_H", drm->mode->vdisplay);
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if (drm->kms_in_fence_fd != -1) {
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add_crtc_property(drm, req, drm->crtc_id, "OUT_FENCE_PTR",
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(uint64_t)(unsigned long)&drm->kms_out_fence_fd);
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add_plane_property(drm, req, plane_id, "IN_FENCE_FD", drm->kms_in_fence_fd);
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}
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ret = drmModeAtomicCommit(drm->fd, req, flags, NULL);
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if (ret)
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goto out;
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if (drm->kms_in_fence_fd != -1) {
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close(drm->kms_in_fence_fd);
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drm->kms_in_fence_fd = -1;
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}
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out:
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drmModeAtomicFree(req);
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return ret;
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}
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21
src/drm.h
21
src/drm.h
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@ -5,6 +5,24 @@
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#include <xf86drm.h>
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#include <xf86drmMode.h>
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struct plane {
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drmModePlane *plane;
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drmModeObjectProperties *props;
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drmModePropertyRes **props_info;
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};
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struct crtc {
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drmModeCrtc *crtc;
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drmModeObjectProperties *props;
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drmModePropertyRes **props_info;
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};
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struct connector {
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drmModeConnector *connector;
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drmModeObjectProperties *props;
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drmModePropertyRes **props_info;
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};
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struct drm_t {
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int fd;
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@ -19,6 +37,8 @@ struct drm_t {
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drmModeModeInfo *mode;
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uint32_t crtc_id;
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uint32_t connector_id;
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uint32_t plane_id;
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};
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#ifndef C_SIDE
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@ -28,6 +48,7 @@ extern "C" {
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extern struct drm_t g_DRM;
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int init_drm(struct drm_t *drm, const char *device, const char *mode_str, unsigned int vrefresh);
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int drm_atomic_commit(struct drm_t *drm, uint32_t fb_id, uint32_t flags);
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#ifndef C_SIDE
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}
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