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use dlopen to load external DRM driver

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This commit is contained in:
Vincent Wei
2019-11-20 10:34:21 +08:00
parent 38234739e5
commit de64d2ac96
1 changed files with 48 additions and 3 deletions
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51
src/newgal/dri/drivideo.c
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@@ -52,6 +52,7 @@
#ifdef _MGGAL_DRI
#include <dlfcn.h>
#include <sys/mman.h>
#include <sys/sysmacros.h>
#include <sys/types.h>
@@ -195,6 +196,8 @@ static void drm_cleanup(DriVideoData* vdata)
/* free allocated memory */
free(iter);
}
close (vdata->dev_fd);
}
static void DRI_DeleteDevice(GAL_VideoDevice *device)
@@ -205,6 +208,9 @@ static void DRI_DeleteDevice(GAL_VideoDevice *device)
device->hidden->driver_ops->destroy_driver(device->hidden->driver);
}
if (device->hidden->exdrv_handle)
dlclose(device->hidden->exdrv_handle);
free(device->hidden);
free(device);
}
@@ -254,6 +260,45 @@ static char* find_driver_for_device (const char *dev_name)
return strdup (driver + strlen ("/"));
}
#define LEN_DRIVER_FILENAME 255
static DriDriverOps* load_external_driver (DriVideoData* vdata,
const char* driver_name, int device_fd)
{
const char* filename = NULL;
char buff[LEN_DRIVER_FILENAME + 1];
DriDriverOps* (*get_exdrv) (const char* driver_name, int device_fd);
char* error;
filename = getenv ("MG_GAL_DRI_DRIVER");
if (filename == NULL) {
memset (buff, 0, sizeof (buff));
if (GetMgEtcValue ("dri", "exdriver", buff, LEN_DRIVER_FILENAME) < 0)
return NULL;
filename = buff;
}
vdata->exdrv_handle = dlopen (filename, RTLD_LAZY);
if (!vdata->exdrv_handle) {
_WRN_PRINTF("Failed to open specified external DRI driver: %s (%s)\n",
filename, dlerror());
return NULL;
}
dlerror(); /* Clear any existing error */
get_exdrv = dlsym (vdata->exdrv_handle, "__dri_ex_driver_get");
error = dlerror();
if (error) {
_WRN_PRINTF("Failed to get symbol: %s\n", error);
dlclose (vdata->exdrv_handle);
vdata->exdrv_handle = NULL;
return NULL;
}
return get_exdrv (driver_name, device_fd);
}
static int open_drm_device(GAL_VideoDevice *device)
{
char *driver_name;
@@ -270,9 +315,9 @@ static int open_drm_device(GAL_VideoDevice *device)
return -errno;
}
#ifdef __TARGET_EXTERNAL__
device->hidden->driver_ops = __dri_ex_driver_get(driver_name);
#endif
device->hidden->driver_ops = load_external_driver (device->hidden,
driver_name, device_fd);
free (driver_name);
if (device->hidden->driver_ops == NULL) {