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/*
* Copyright (c) 2017 Rob Clark <rclark@redhat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sub license,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "common.h"
#include "drm-common.h"
#define VOID2U64(x) ((uint64_t)(unsigned long)(x))
static struct drm drm = {
.kms_out_fence_fd = -1,
};
static int add_connector_property(drmModeAtomicReq *req, uint32_t obj_id,
const char *name, uint64_t value)
{
struct connector *obj = drm.connector;
unsigned int i;
int prop_id = 0;
for (i = 0 ; i < obj->props->count_props ; i++) {
if (strcmp(obj->props_info[i]->name, name) == 0) {
prop_id = obj->props_info[i]->prop_id;
break;
}
}
if (prop_id < 0) {
printf("no connector property: %s\n", name);
return -EINVAL;
}
return drmModeAtomicAddProperty(req, obj_id, prop_id, value);
}
static int add_crtc_property(drmModeAtomicReq *req, uint32_t obj_id,
const char *name, uint64_t value)
{
struct crtc *obj = drm.crtc;
unsigned int i;
int prop_id = -1;
for (i = 0 ; i < obj->props->count_props ; i++) {
if (strcmp(obj->props_info[i]->name, name) == 0) {
prop_id = obj->props_info[i]->prop_id;
break;
}
}
if (prop_id < 0) {
printf("no crtc property: %s\n", name);
return -EINVAL;
}
return drmModeAtomicAddProperty(req, obj_id, prop_id, value);
}
static int add_plane_property(drmModeAtomicReq *req, uint32_t obj_id,
const char *name, uint64_t value)
{
struct plane *obj = drm.plane;
unsigned int i;
int prop_id = -1;
for (i = 0 ; i < obj->props->count_props ; i++) {
if (strcmp(obj->props_info[i]->name, name) == 0) {
prop_id = obj->props_info[i]->prop_id;
break;
}
}
if (prop_id < 0) {
printf("no plane property: %s\n", name);
return -EINVAL;
}
return drmModeAtomicAddProperty(req, obj_id, prop_id, value);
}
static int drm_atomic_commit(uint32_t fb_id, uint32_t flags)
{
drmModeAtomicReq *req;
uint32_t plane_id = drm.plane->plane->plane_id;
uint32_t blob_id;
int ret;
req = drmModeAtomicAlloc();
if (flags & DRM_MODE_ATOMIC_ALLOW_MODESET) {
if (add_connector_property(req, drm.connector_id, "CRTC_ID",
drm.crtc_id) < 0)
return -1;
if (drmModeCreatePropertyBlob(drm.fd, drm.mode, sizeof(*drm.mode),
&blob_id) != 0)
return -1;
if (add_crtc_property(req, drm.crtc_id, "MODE_ID", blob_id) < 0)
return -1;
if (add_crtc_property(req, drm.crtc_id, "ACTIVE", 1) < 0)
return -1;
}
add_plane_property(req, plane_id, "FB_ID", fb_id);
add_plane_property(req, plane_id, "CRTC_ID", drm.crtc_id);
add_plane_property(req, plane_id, "SRC_X", 0);
add_plane_property(req, plane_id, "SRC_Y", 0);
add_plane_property(req, plane_id, "SRC_W", drm.mode->hdisplay << 16);
add_plane_property(req, plane_id, "SRC_H", drm.mode->vdisplay << 16);
add_plane_property(req, plane_id, "CRTC_X", 0);
add_plane_property(req, plane_id, "CRTC_Y", 0);
add_plane_property(req, plane_id, "CRTC_W", drm.mode->hdisplay);
add_plane_property(req, plane_id, "CRTC_H", drm.mode->vdisplay);
if (drm.kms_in_fence_fd != -1) {
add_crtc_property(req, drm.crtc_id, "OUT_FENCE_PTR",
VOID2U64(&drm.kms_out_fence_fd));
add_plane_property(req, plane_id, "IN_FENCE_FD", drm.kms_in_fence_fd);
}
ret = drmModeAtomicCommit(drm.fd, req, flags, NULL);
if (ret)
goto out;
if (drm.kms_in_fence_fd != -1) {
close(drm.kms_in_fence_fd);
drm.kms_in_fence_fd = -1;
}
out:
drmModeAtomicFree(req);
return ret;
}
static EGLSyncKHR create_fence(const struct egl *egl, int fd)
{
EGLint attrib_list[] = {
EGL_SYNC_NATIVE_FENCE_FD_ANDROID, fd,
EGL_NONE,
};
EGLSyncKHR fence = egl->eglCreateSyncKHR(egl->display,
EGL_SYNC_NATIVE_FENCE_ANDROID, attrib_list);
assert(fence);
return fence;
}
static int atomic_run(const struct gbm *gbm, const struct egl *egl)
{
struct gbm_bo *bo = NULL;
struct drm_fb *fb;
uint32_t i = 0;
uint32_t flags = DRM_MODE_ATOMIC_NONBLOCK;
int ret;
if (egl_check(egl, eglDupNativeFenceFDANDROID) ||
egl_check(egl, eglCreateSyncKHR) ||
egl_check(egl, eglDestroySyncKHR) ||
egl_check(egl, eglWaitSyncKHR) ||
egl_check(egl, eglClientWaitSyncKHR))
return -1;
/* Allow a modeset change for the first commit only. */
flags |= DRM_MODE_ATOMIC_ALLOW_MODESET;
while (1) {
struct gbm_bo *next_bo;
EGLSyncKHR gpu_fence = NULL; /* out-fence from gpu, in-fence to kms */
EGLSyncKHR kms_fence = NULL; /* in-fence to gpu, out-fence from kms */
if (drm.kms_out_fence_fd != -1) {
kms_fence = create_fence(egl, drm.kms_out_fence_fd);
assert(kms_fence);
/* driver now has ownership of the fence fd: */
drm.kms_out_fence_fd = -1;
/* wait "on the gpu" (ie. this won't necessarily block, but
* will block the rendering until fence is signaled), until
* the previous pageflip completes so we don't render into
* the buffer that is still on screen.
*/
egl->eglWaitSyncKHR(egl->display, kms_fence, 0);
}
egl->draw(i++);
/* insert fence to be singled in cmdstream.. this fence will be
* signaled when gpu rendering done
*/
gpu_fence = create_fence(egl, EGL_NO_NATIVE_FENCE_FD_ANDROID);
assert(gpu_fence);
eglSwapBuffers(egl->display, egl->surface);
/* after swapbuffers, gpu_fence should be flushed, so safe
* to get fd:
*/
drm.kms_in_fence_fd = egl->eglDupNativeFenceFDANDROID(egl->display, gpu_fence);
egl->eglDestroySyncKHR(egl->display, gpu_fence);
assert(drm.kms_in_fence_fd != -1);
next_bo = gbm_surface_lock_front_buffer(gbm->surface);
if (!next_bo) {
printf("Failed to lock frontbuffer\n");
return -1;
}
fb = drm_fb_get_from_bo(next_bo);
if (!fb) {
printf("Failed to get a new framebuffer BO\n");
return -1;
}
if (kms_fence) {
EGLint status;
/* Wait on the CPU side for the _previous_ commit to
* complete before we post the flip through KMS, as
* atomic will reject the commit if we post a new one
* whilst the previous one is still pending.
*/
do {
status = egl->eglClientWaitSyncKHR(egl->display,
kms_fence,
0,
EGL_FOREVER_KHR);
} while (status != EGL_CONDITION_SATISFIED_KHR);
egl->eglDestroySyncKHR(egl->display, kms_fence);
}
/*
* Here you could also update drm plane layers if you want
* hw composition
*/
ret = drm_atomic_commit(fb->fb_id, flags);
if (ret) {
printf("failed to commit: %s\n", strerror(errno));
return -1;
}
/* release last buffer to render on again: */
if (bo)
gbm_surface_release_buffer(gbm->surface, bo);
bo = next_bo;
/* Allow a modeset change for the first commit only. */
flags &= ~(DRM_MODE_ATOMIC_ALLOW_MODESET);
}
return ret;
}
/* Pick a plane.. something that at a minimum can be connected to
* the chosen crtc, but prefer primary plane.
*
* Seems like there is some room for a drmModeObjectGetNamedProperty()
* type helper in libdrm..
*/
static int get_plane_id(void)
{
drmModePlaneResPtr plane_resources;
uint32_t i, j;
int ret = -EINVAL;
int found_primary = 0;
plane_resources = drmModeGetPlaneResources(drm.fd);
if (!plane_resources) {
printf("drmModeGetPlaneResources failed: %s\n", strerror(errno));
return -1;
}
for (i = 0; (i < plane_resources->count_planes) && !found_primary; i++) {
uint32_t id = plane_resources->planes[i];
drmModePlanePtr plane = drmModeGetPlane(drm.fd, id);
if (!plane) {
printf("drmModeGetPlane(%u) failed: %s\n", id, strerror(errno));
continue;
}
if (plane->possible_crtcs & (1 << drm.crtc_index)) {
drmModeObjectPropertiesPtr props =
drmModeObjectGetProperties(drm.fd, id, DRM_MODE_OBJECT_PLANE);
/* primary or not, this plane is good enough to use: */
ret = id;
for (j = 0; j < props->count_props; j++) {
drmModePropertyPtr p =
drmModeGetProperty(drm.fd, props->props[j]);
if ((strcmp(p->name, "type") == 0) &&
(props->prop_values[j] == DRM_PLANE_TYPE_PRIMARY)) {
/* found our primary plane, lets use that: */
found_primary = 1;
}
drmModeFreeProperty(p);
}
drmModeFreeObjectProperties(props);
}
drmModeFreePlane(plane);
}
drmModeFreePlaneResources(plane_resources);
return ret;
}
const struct drm * init_drm_atomic(const char *device, const char *mode_str, unsigned int vrefresh)
{
uint32_t plane_id;
int ret;
ret = init_drm(&drm, device, mode_str, vrefresh);
if (ret)
return NULL;
ret = drmSetClientCap(drm.fd, DRM_CLIENT_CAP_ATOMIC, 1);
if (ret) {
printf("no atomic modesetting support: %s\n", strerror(errno));
return NULL;
}
ret = get_plane_id();
if (!ret) {
printf("could not find a suitable plane\n");
return NULL;
} else {
plane_id = ret;
}
/* We only do single plane to single crtc to single connector, no
* fancy multi-monitor or multi-plane stuff. So just grab the
* plane/crtc/connector property info for one of each:
*/
drm.plane = calloc(1, sizeof(*drm.plane));
drm.crtc = calloc(1, sizeof(*drm.crtc));
drm.connector = calloc(1, sizeof(*drm.connector));
#define get_resource(type, Type, id) do { \
drm.type->type = drmModeGet##Type(drm.fd, id); \
if (!drm.type->type) { \
printf("could not get %s %i: %s\n", \
#type, id, strerror(errno)); \
return NULL; \
} \
} while (0)
get_resource(plane, Plane, plane_id);
get_resource(crtc, Crtc, drm.crtc_id);
get_resource(connector, Connector, drm.connector_id);
#define get_properties(type, TYPE, id) do { \
uint32_t i; \
drm.type->props = drmModeObjectGetProperties(drm.fd, \
id, DRM_MODE_OBJECT_##TYPE); \
if (!drm.type->props) { \
printf("could not get %s %u properties: %s\n", \
#type, id, strerror(errno)); \
return NULL; \
} \
drm.type->props_info = calloc(drm.type->props->count_props, \
sizeof(*drm.type->props_info)); \
for (i = 0; i < drm.type->props->count_props; i++) { \
drm.type->props_info[i] = drmModeGetProperty(drm.fd, \
drm.type->props->props[i]); \
} \
} while (0)
get_properties(plane, PLANE, plane_id);
get_properties(crtc, CRTC, drm.crtc_id);
get_properties(connector, CONNECTOR, drm.connector_id);
drm.run = atomic_run;
return &drm;
}
|