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kmsdrm: enable vrr on displays that support it

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antonino 2022-08-17 14:56:18 +02:00 committed by Sam Lantinga
parent 6e9c14e550
commit ad874536a4
2 changed files with 96 additions and 0 deletions
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3
src/video/kmsdrm/SDL_kmsdrmsym.h
View File

@ -80,6 +80,9 @@ SDL_KMSDRM_SYM(int,drmSetClientCap,(int fd, uint64_t capability, uint64_t value)
SDL_KMSDRM_SYM(drmModePlaneResPtr,drmModeGetPlaneResources,(int fd))
SDL_KMSDRM_SYM(drmModePlanePtr,drmModeGetPlane,(int fd, uint32_t plane_id))
SDL_KMSDRM_SYM(drmModeObjectPropertiesPtr,drmModeObjectGetProperties,(int fd,uint32_t object_id,uint32_t object_type))
SDL_KMSDRM_SYM(int,drmModeObjectSetProperty,(int fd, uint32_t object_id,
uint32_t object_type, uint32_t property_id,
uint64_t value))
SDL_KMSDRM_SYM(drmModePropertyPtr,drmModeGetProperty,(int fd, uint32_t propertyId))
SDL_KMSDRM_SYM(void,drmModeFreeProperty,(drmModePropertyPtr ptr))

93
src/video/kmsdrm/SDL_kmsdrmvideo.c
View File

@ -534,6 +534,93 @@ KMSDRM_DeinitDisplays (_THIS) {
}
}
static uint32_t
KMSDRM_CrtcGetPropId(uint32_t drm_fd,
drmModeObjectPropertiesPtr props,
char const* name)
{
uint32_t i, prop_id = 0;
for (i = 0; !prop_id && i < props->count_props; ++i) {
drmModePropertyPtr drm_prop =
KMSDRM_drmModeGetProperty(drm_fd, props->props[i]);
if (!drm_prop)
continue;
if (strcmp(drm_prop->name, name) == 0)
prop_id = drm_prop->prop_id;
KMSDRM_drmModeFreeProperty(drm_prop);
}
return prop_id;
}
static uint32_t KMSDRM_VrrPropId(uint32_t drm_fd, uint32_t crtc_id) {
drmModeObjectPropertiesPtr drm_props;
uint32_t vrr_prop_id;
drm_props = KMSDRM_drmModeObjectGetProperties(drm_fd,
crtc_id,
DRM_MODE_OBJECT_CRTC);
if (!drm_props)
exit(-1);
vrr_prop_id = KMSDRM_CrtcGetPropId(drm_fd,
drm_props,
"VRR_ENABLED");
KMSDRM_drmModeFreeObjectProperties(drm_props);
return vrr_prop_id;
}
static SDL_bool
KMSDRM_ConnectorCheckVrrCapable(uint32_t drm_fd,
uint32_t output_id,
char const* name)
{
uint32_t i;
Bool found = SDL_FALSE;
uint64_t prop_value = 0;
drmModeObjectPropertiesPtr props = KMSDRM_drmModeObjectGetProperties(drm_fd,
output_id,
DRM_MODE_OBJECT_CONNECTOR);
for (i = 0; !found && i < props->count_props; ++i) {
drmModePropertyPtr drm_prop = KMSDRM_drmModeGetProperty(drm_fd, props->props[i]);
if (!drm_prop)
continue;
if (strcasecmp(drm_prop->name, name) == 0) {
prop_value = props->prop_values[i];
found = SDL_TRUE;
}
KMSDRM_drmModeFreeProperty(drm_prop);
}
if(found)
return prop_value ? SDL_TRUE: SDL_FALSE;
return SDL_FALSE;
}
void
KMSDRM_CrtcSetVrr(uint32_t drm_fd, uint32_t crtc_id, Bool enabled)
{
uint32_t vrr_prop_id = KMSDRM_VrrPropId(drm_fd, crtc_id);
KMSDRM_drmModeObjectSetProperty(drm_fd,
crtc_id,
DRM_MODE_OBJECT_CRTC,
vrr_prop_id,
enabled);
}
/* Gets a DRM connector, builds an SDL_Display with it, and adds it to the
list of SDL Displays in _this->displays[] */
static void
@ -701,6 +788,12 @@ KMSDRM_AddDisplay (_THIS, drmModeConnector *connector, drmModeRes *resources) {
/* Add the display to the list of SDL displays. */
SDL_AddVideoDisplay(&display, SDL_FALSE);
/* try to enable vrr */
if(KMSDRM_ConnectorCheckVrrCapable(viddata->drm_fd, connector->connector_id, "VRR_CAPABLE")) {
SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "Enabling VRR");
KMSDRM_CrtcSetVrr(viddata->drm_fd, crtc->crtc_id, SDL_TRUE);
}
cleanup:
if (encoder)
KMSDRM_drmModeFreeEncoder(encoder);