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request: Check required v4l2 capabilities after opening the video node

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Since our use of the v4l2 API has some assumptions on the available
userspace APIs, check the capabilities reported by the driver to make
sure they are supported.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
This commit is contained in:
Paul Kocialkowski
2018-08-06 16:39:16 +02:00
parent 57999e3883
commit e96e5f392a
1 changed files with 13 additions and 5 deletions
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src/request.c
+13 -5
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@@ -37,6 +37,7 @@
#include "request.h"
#include "utils.h"
#include "v4l2.h"
#include <assert.h>
#include <stdio.h>
@@ -59,8 +60,9 @@ VAStatus VA_DRIVER_INIT_FUNC(VADriverContextP context)
{
struct request_data *driver_data;
struct VADriverVTable *vtable = context->vtable;
struct v4l2_capability capability;
VAStatus status;
unsigned int capabilities;
unsigned int capabilities_required;
int video_fd = -1;
int media_fd = -1;
char *video_path;
@@ -151,10 +153,16 @@ VAStatus VA_DRIVER_INIT_FUNC(VADriverContextP context)
if (video_fd < 0)
return VA_STATUS_ERROR_OPERATION_FAILED;
rc = ioctl(video_fd, VIDIOC_QUERYCAP, &capability);
if (rc < 0 || !(capability.capabilities & V4L2_CAP_VIDEO_M2M_MPLANE)) {
request_log("Video device %s does not support m2m mplanes\n",
video_path);
rc = v4l2_query_capabilities(video_fd, &capabilities);
if (rc < 0) {
status = VA_STATUS_ERROR_OPERATION_FAILED;
goto error;
}
capabilities_required = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING;
if ((capabilities & capabilities_required) != capabilities_required) {
request_log("Missing required driver capabilities\n");
status = VA_STATUS_ERROR_OPERATION_FAILED;
goto error;
}