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#define LOG_TAG "GRALLOC-KMS"
#include <cutils/log.h>
#include <errno.h>
#include <unistd.h>
#include "gralloc_kms.h"
int
drm_kms_add_fb(struct drm_module_t *drm, struct drm_bo_t *bo)
{
uint8_t bpp;
bpp = drm_mod_get_bpp(bo->format) * 8;
return drmModeAddFB(drm->fd, bo->width, bo->height, bpp, bpp,
bo->stride, bo->fb_handle, (uint32_t *) &bo->fb_id);
}
void
drm_kms_rm_fb(struct drm_module_t *drm, struct drm_bo_t *bo)
{
drmModeRmFB(drm->fd, bo->fb_id);
bo->fb_id = 0;
}
static void
drm_kms_wait_vblank(struct drm_module_t *drm, int num)
{
drmVBlank vbl;
int ret;
memset(&vbl, 0, sizeof(vbl));
vbl.request.type = DRM_VBLANK_RELATIVE;
if (drm->vblank_secondary)
vbl.request.type |= DRM_VBLANK_SECONDARY;
vbl.request.sequence = num;
ret = drmWaitVBlank(drm->fd, &vbl);
if (ret)
LOGW("failed to wait vblank");
}
static int
drm_kms_set_crtc(struct drm_module_t *drm, struct drm_bo_t *bo)
{
int ret;
if (drm->swap_interval)
drm_kms_wait_vblank(drm, drm->swap_interval);
ret = drmModeSetCrtc(drm->fd, drm->crtc_id, bo->fb_id,
0, 0, &drm->connector_id, 1, &drm->mode);
if (ret) {
LOGE("failed to set crtc");
return ret;
}
#ifdef DRM_MODE_FEATURE_DIRTYFB
if (drm->mode_dirty_fb)
ret = drmModeDirtyFB(drm->fd, bo->fb_id, &drm->clip, 1);
#endif
return ret;
}
static void page_flip_handler(int fd, unsigned int sequence,
unsigned int tv_sec, unsigned int tv_usec,
void *user_data)
{
struct drm_module_t *drm = (struct drm_module_t *) user_data;
drm->flip_pending = 0;
}
static int
drm_kms_page_flip(struct drm_module_t *drm, struct drm_bo_t *bo)
{
int retries = 3, ret;
if (drm->swap_interval > 1)
drm_kms_wait_vblank(drm, drm->swap_interval - 1);
/* TODO throttle page flip instead of retrying here */
while (retries) {
ret = drmModePageFlip(drm->fd, drm->crtc_id, bo->fb_id,
DRM_MODE_PAGE_FLIP_EVENT, (void *) drm);
if (ret && errno == EBUSY) {
if (drm->swap_interval)
drm_kms_wait_vblank(drm, 1);
else
usleep(5000);
retries--;
}
else {
if (!ret)
drm->flip_pending = 1;
break;
}
}
if (drm->mode_page_flip_blocking && drm->flip_pending) {
drmEventContext ctx;
memset(&ctx, 0, sizeof(ctx));
ctx.version = DRM_EVENT_CONTEXT_VERSION;
ctx.page_flip_handler = page_flip_handler;
while (drm->flip_pending)
drmHandleEvent(drm->fd, &ctx);
}
if (ret)
LOGE("failed to perform page flip");
return ret;
}
int
drm_kms_post(struct drm_module_t *drm, struct drm_bo_t *bo)
{
int ret;
if (!bo->fb_id) {
LOGE("unable to post bo %p without fb", bo);
return -EINVAL;
}
/* TODO spawn a thread to avoid waiting */
if (drm->first_post) {
pthread_mutex_lock(&drm->mutex);
if (drm->first_post) {
ret = drm_kms_set_crtc(drm, bo);
if (!ret)
drm->first_post = 0;
pthread_mutex_unlock(&drm->mutex);
return ret;
}
pthread_mutex_unlock(&drm->mutex);
}
if (drm->mode_page_flip && drm->swap_interval)
ret = drm_kms_page_flip(drm, bo);
else
ret = drm_kms_set_crtc(drm, bo);
return ret;
}
static int
drm_kms_init_with_connector_locked(struct drm_module_t *drm,
drmModeConnectorPtr connector)
{
drmModeEncoderPtr encoder;
drmModeModeInfoPtr mode;
int i;
if (!connector->count_modes)
return -EINVAL;
encoder = drmModeGetEncoder(drm->fd, connector->encoders[0]);
if (!encoder)
return -EINVAL;
for (i = 0; i < drm->resources->count_crtcs; i++) {
if (encoder->possible_crtcs & (1 << i))
break;
}
drmModeFreeEncoder(encoder);
if (i == drm->resources->count_crtcs)
return -EINVAL;
drm->crtc_id = drm->resources->crtcs[i];
drm->connector_id = connector->connector_id;
/* find the first preferred mode */
mode = NULL;
for (i = 0; i < connector->count_modes; i++) {
drmModeModeInfoPtr m = &connector->modes[i];
if (m->type & DRM_MODE_TYPE_PREFERRED) {
mode = m;
break;
}
}
/* no preference; use the first */
if (!mode)
mode = &connector->modes[0];
drm->mode = *mode;
if (connector->mmWidth && connector->mmHeight) {
drm->xdpi = (drm->mode.hdisplay * 25.4 / connector->mmWidth);
drm->ydpi = (drm->mode.vdisplay * 25.4 / connector->mmHeight);
}
else {
drm->xdpi = 75;
drm->ydpi = 75;
}
/* select between 32/16 bits */
#if 1
drm->format = HAL_PIXEL_FORMAT_BGRA_8888;
#else
drm->format = HAL_PIXEL_FORMAT_RGB_565;
#endif
#ifdef DRM_MODE_FEATURE_DIRTYFB
drm->clip.x1 = 0;
drm->clip.y1 = 0;
drm->clip.x2 = drm->mode.hdisplay;
drm->clip.y2 = drm->mode.vdisplay;
#endif
drm->first_post = 1;
return 0;
}
static int
drm_kms_init_locked(struct drm_module_t *drm)
{
int i, ret;
if (drm->resources)
return 0;
drm->resources = drmModeGetResources(drm->fd);
if (!drm->resources) {
LOGE("failed to get modeset resources");
return -EINVAL;
}
for (i = 0; i < drm->resources->count_connectors; i++) {
drmModeConnectorPtr connector;
connector = drmModeGetConnector(drm->fd, drm->resources->connectors[i]);
if (connector) {
if (connector->connection == DRM_MODE_CONNECTED) {
if (!drm_kms_init_with_connector_locked(drm, connector))
break;
}
drmModeFreeConnector(connector);
}
}
if (i == drm->resources->count_connectors) {
drmModeFreeResources(drm->resources);
drm->resources = NULL;
return -EINVAL;
}
return 0;
}
int
drm_kms_init(struct drm_module_t *drm)
{
int ret;
pthread_mutex_lock(&drm->mutex);
ret = drm_kms_init_locked(drm);
pthread_mutex_unlock(&drm->mutex);
return ret;
}
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