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Subject: v4l2-compliance: Test queue maximum buffers allocation Author: Benjamin Gaignard <benjamin.gaign...@collabora.com> Date: Tue Nov 7 11:41:30 2023 +0100 If V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS is set v4l2_create_buffers 'max_num_buffers' field reports the maximum number of buffers supported by the queue. Add a test to allocate this maximum value and make sure that one more allocation is failing. Display the flag in v4l2-ctl. Signed-off-by: Benjamin Gaignard <benjamin.gaign...@collabora.com> Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl> utils/common/cv4l-helpers.h | 1 + utils/common/v4l-helpers.h | 5 +++++ utils/common/v4l2-info.cpp | 1 + utils/v4l2-compliance/v4l2-compliance.cpp | 1 + utils/v4l2-compliance/v4l2-compliance.h | 1 + utils/v4l2-compliance/v4l2-test-buffers.cpp | 31 +++++++++++++++++++++++++++++ 6 files changed, 40 insertions(+) --- http://git.linuxtv.org/cgit.cgi/v4l-utils.git/commit/?id=647c7cd7989280cfb7dcd1dee52ffe79e6d876e9 diff --git a/utils/common/cv4l-helpers.h b/utils/common/cv4l-helpers.h index 91a04146cea1..199aca365a44 100644 --- a/utils/common/cv4l-helpers.h +++ b/utils/common/cv4l-helpers.h @@ -743,6 +743,7 @@ public: unsigned g_type() const { return v4l_queue_g_type(this); } unsigned g_memory() const { return v4l_queue_g_memory(this); } unsigned g_buffers() const { return v4l_queue_g_buffers(this); } + unsigned g_max_num_buffers() const { return v4l_queue_g_max_num_buffers(this); } unsigned g_num_planes() const { return v4l_queue_g_num_planes(this); } unsigned g_capabilities() const { return v4l_queue_g_capabilities(this); } unsigned g_length(unsigned plane) const { return v4l_queue_g_length(this, plane); } diff --git a/utils/common/v4l-helpers.h b/utils/common/v4l-helpers.h index f8e96d58530e..cf0e92df12e4 100644 --- a/utils/common/v4l-helpers.h +++ b/utils/common/v4l-helpers.h @@ -1429,6 +1429,7 @@ struct v4l_queue { unsigned mappings; unsigned num_planes; unsigned capabilities; + unsigned max_num_buffers; __u32 lengths[VIDEO_MAX_PLANES]; __u32 mem_offsets[VIDEO_MAX_FRAME][VIDEO_MAX_PLANES]; @@ -1453,6 +1454,7 @@ static inline void v4l_queue_init(struct v4l_queue *q, static inline unsigned v4l_queue_g_type(const struct v4l_queue *q) { return q->type; } static inline unsigned v4l_queue_g_memory(const struct v4l_queue *q) { return q->memory; } static inline unsigned v4l_queue_g_buffers(const struct v4l_queue *q) { return q->buffers; } +static inline unsigned v4l_queue_g_max_num_buffers(const struct v4l_queue *q) { return q->max_num_buffers; } static inline unsigned v4l_queue_g_mappings(const struct v4l_queue *q) { return q->mappings; } static inline unsigned v4l_queue_g_num_planes(const struct v4l_queue *q) { return q->num_planes; } static inline unsigned v4l_queue_g_capabilities(const struct v4l_queue *q) { return q->capabilities; } @@ -1587,6 +1589,9 @@ static inline int v4l_queue_create_bufs(struct v4l_fd *f, if (ret) return ret; q->capabilities = createbufs.capabilities; + q->max_num_buffers = 32; + if (q->capabilities & V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS) + q->max_num_buffers = createbufs.max_num_buffers; q->buffers += createbufs.count; return v4l_queue_querybufs(f, q, q->buffers - createbufs.count); } diff --git a/utils/common/v4l2-info.cpp b/utils/common/v4l2-info.cpp index 4f8c2aa7e57b..5fc920056e2b 100644 --- a/utils/common/v4l2-info.cpp +++ b/utils/common/v4l2-info.cpp @@ -206,6 +206,7 @@ static constexpr flag_def bufcap_def[] = { { V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS, "orphaned-bufs" }, { V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF, "m2m-hold-capture-buf" }, { V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS, "mmap-cache-hints" }, + { V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS, "set-max-num-buffers" }, { 0, nullptr } }; diff --git a/utils/v4l2-compliance/v4l2-compliance.cpp b/utils/v4l2-compliance/v4l2-compliance.cpp index 29475d6b3b4e..a83d6413b836 100644 --- a/utils/v4l2-compliance/v4l2-compliance.cpp +++ b/utils/v4l2-compliance/v4l2-compliance.cpp @@ -1453,6 +1453,7 @@ void testNode(struct node &node, struct node &node_m2m_cap, struct node &expbuf_ printf("Buffer ioctls%s:\n", suffix); printf("\ttest VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: %s\n", ok(testReqBufs(&node))); + printf("\ttest CREATE_BUFS maximum buffers: %s\n", ok(testCreateBufsMax(&node))); // Reopen after each streaming test to reset the streaming state // in case of any errors in the preceeding test. node.reopen(); diff --git a/utils/v4l2-compliance/v4l2-compliance.h b/utils/v4l2-compliance/v4l2-compliance.h index 7e3860c82cca..4f9aa17e3749 100644 --- a/utils/v4l2-compliance/v4l2-compliance.h +++ b/utils/v4l2-compliance/v4l2-compliance.h @@ -383,6 +383,7 @@ int testReqBufs(struct node *node); int testReadWrite(struct node *node); int testExpBuf(struct node *node); int testBlockingWait(struct node *node); +int testCreateBufsMax(struct node *node); // 32-bit architecture, 32/64-bit time_t tests int testTime32_64(struct node *node); diff --git a/utils/v4l2-compliance/v4l2-test-buffers.cpp b/utils/v4l2-compliance/v4l2-test-buffers.cpp index 6d592c9b094b..922b99b556cd 100644 --- a/utils/v4l2-compliance/v4l2-test-buffers.cpp +++ b/utils/v4l2-compliance/v4l2-test-buffers.cpp @@ -761,6 +761,37 @@ int testReqBufs(struct node *node) return 0; } +int testCreateBufsMax(struct node *node) +{ + unsigned int i; + int ret; + + node->reopen(); + + cv4l_queue q(0, 0); + + for (i = 1; i <= V4L2_BUF_TYPE_LAST; i++) { + if (!(node->valid_buftypes & (1 << i))) + continue; + + q.init(i, V4L2_MEMORY_MMAP); + ret = q.create_bufs(node, 0); + if (!ret && (q.g_capabilities() & V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS)) { + fail_on_test(q.create_bufs(node, q.g_max_num_buffers())); + /* Some drivers may not have allocated all the requested buffers + * because of memory limitation, that is OK but make the next test + * failed so skip it + */ + if (q.g_max_num_buffers() != q.g_buffers()) + continue; + ret = q.create_bufs(node, 1); + fail_on_test(ret != ENOBUFS); + } + } + + return 0; +} + int testExpBuf(struct node *node) { bool have_expbuf = false; _______________________________________________ linuxtv-commits mailing list linuxtv-commits@linuxtv.org https://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
