100 lines
2.9 KiB
C
100 lines
2.9 KiB
C
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <xf86drm.h>
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#include <xf86drmMode.h>
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#include <wlr/util/log.h>
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#include "drm-properties.h"
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/*
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* Creates a mapping between property names and an array index where to store
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* the ids. The prop_info arrays must be sorted by name, as bsearch is used to
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* search them.
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*/
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struct prop_info {
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const char *name;
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size_t index;
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};
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static const struct prop_info connector_info[] = {
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#define INDEX(name) (offsetof(union wlr_drm_connector_props, name) / sizeof(uint32_t))
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{ "CRTC_ID", INDEX(crtc_id) },
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{ "DPMS", INDEX(dpms) },
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{ "EDID", INDEX(edid) },
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#undef INDEX
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};
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static const struct prop_info crtc_info[] = {
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#define INDEX(name) (offsetof(union wlr_drm_crtc_props, name) / sizeof(uint32_t))
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{ "rotation", INDEX(rotation) },
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{ "scaling mode", INDEX(scaling_mode) },
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#undef INDEX
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};
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static const struct prop_info plane_info[] = {
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#define INDEX(name) (offsetof(union wlr_drm_plane_props, name) / sizeof(uint32_t))
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{ "CRTC_H", INDEX(crtc_h) },
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{ "CRTC_ID", INDEX(crtc_id) },
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{ "CRTC_W", INDEX(crtc_w) },
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{ "CRTC_X", INDEX(crtc_x) },
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{ "CRTC_Y", INDEX(crtc_y) },
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{ "FB_ID", INDEX(fb_id) },
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{ "SRC_H", INDEX(src_h) },
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{ "SRC_W", INDEX(src_w) },
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{ "SRC_X", INDEX(src_x) },
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{ "SRC_Y", INDEX(src_y) },
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{ "type", INDEX(type) },
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#undef INDEX
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};
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static int cmp_prop_info(const void *arg1, const void *arg2) {
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const struct prop_info *a = arg1;
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const struct prop_info *b = arg2;
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return strcmp(a->name, b->name);
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}
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static bool scan_properties(int fd, uint32_t id, uint32_t type, uint32_t *result,
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const struct prop_info *info, size_t info_len) {
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drmModeObjectProperties *props = drmModeObjectGetProperties(fd, id, type);
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if (!props) {
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wlr_log_errno(L_ERROR, "Failed to get DRM object properties");
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return false;
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}
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for (uint32_t i = 0; i < props->count_props; ++i) {
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drmModePropertyRes *prop = drmModeGetProperty(fd, props->props[i]);
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if (!prop) {
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wlr_log_errno(L_ERROR, "Failed to get DRM object property");
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continue;
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}
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const struct prop_info *p =
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bsearch(prop->name, info, info_len, sizeof(info[0]), cmp_prop_info);
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if (p) {
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result[p->index] = prop->prop_id;
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}
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drmModeFreeProperty(prop);
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}
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drmModeFreeObjectProperties(props);
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return true;
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}
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bool wlr_drm_get_connector_props(int fd, uint32_t id, union wlr_drm_connector_props *out) {
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return scan_properties(fd, id, DRM_MODE_OBJECT_CONNECTOR, out->props,
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connector_info, sizeof(connector_info) / sizeof(connector_info[0]));
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}
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bool wlr_drm_get_crtc_props(int fd, uint32_t id, union wlr_drm_crtc_props *out) {
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return scan_properties(fd, id, DRM_MODE_OBJECT_CRTC, out->props,
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crtc_info, sizeof(crtc_info) / sizeof(crtc_info[0]));
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}
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bool wlr_drm_get_plane_props(int fd, uint32_t id, union wlr_drm_plane_props *out) {
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return scan_properties(fd, id, DRM_MODE_OBJECT_PLANE, out->props,
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plane_info, sizeof(plane_info) / sizeof(plane_info[0]));
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}
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