- 25 Nov, 2012 25 commits
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Tomasz Stanislawski authored
Most operations on DMA and DMABUF framework require the size of a buffer to be page aligned. This patch guarantees the requirement is satisfied for all vb2-dma-contig buffers. Signed-off-by:
Tomasz Stanislawski <t.stanislaws@samsung.com> Signed-off-by:
Mauro Carvalho Chehab <mchehab@redhat.com>
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Marek Szyprowski authored
The DMA transfer must be aligned to a specific value. If userptr is not aligned to DMA requirements then unexpected corruptions of the memory may occur before or after a buffer. To prevent such situations, all unligned userptr buffers are rejected at VIDIOC_QBUF. Signed-off-by:
Marek Szyprowski <m.szyprowski@samsung.com> Acked-by:
Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by:
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Tomasz Stanislawski authored
This patch adds taking reference to the device for MMAP buffers. Such buffers, may be exported using DMABUF mechanism. If the driver that created a queue is unloaded then the queue is released, the device might be released too. However, buffers cannot be released if they are referenced by DMABUF descriptor(s). The device pointer kept in a buffer must be valid for the whole buffer's lifetime. Therefore MMAP buffers should take a reference to the device to avoid risk of dangling pointers. Signed-off-by:
Laurent Pinchart <laurent.pinchart@ideasonboard.com> Tested-by:
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Tomasz Stanislawski authored
This patch adds support for exporting a dma-contig buffer using DMABUF interface. Signed-off-by:
Kyungmin Park <kyungmin.park@samsung.com> Acked-by:
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Tomasz Stanislawski authored
This patch adds extension to videobuf2-core. It allow to export an mmap buffer as a DMABUF file descriptor. Signed-off-by:
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Tomasz Stanislawski authored
This patch adds description and usage examples for exporting DMABUF file descriptor in V4L2. Signed-off-by:
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Tomasz Stanislawski authored
This patch adds extension to V4L2 api. A new ioctl VIDIOC_EXPBUF is added. The ioctl is used to export an mmap buffer as a DMABUF file descriptor. Signed-off-by:
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Marek Szyprowski authored
Let mmap method to use dma_mmap_coherent call. Moreover, this patch removes vb2_mmap_pfn_range from videobuf2 helpers as it was suggested by Laurent Pinchart. The function is no longer used in vb2 code. Signed-off-by:
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Tomasz Stanislawski authored
This patch enhances s5p-fimc with support for DMABUF importing via V4L2_MEMORY_DMABUF memory type. Signed-off-by:
Sylwester Nawrocki <s.nawrocki@samsung.com> Acked-by:
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Tomasz Stanislawski authored
This patch enhances s5p-tv with support for DMABUF importing via V4L2_MEMORY_DMABUF memory type. Signed-off-by:
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Tomasz Stanislawski authored
This patch enhances mem2mem_testdev device with support for DMABUF importing via V4L2_MEMORY_DMABUF memory type. Signed-off-by:
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Tomasz Stanislawski authored
This patch enhances UVC with support for DMABUF importing via V4L2_MEMORY_DMABUF memory type. Signed-off-by:
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Tomasz Stanislawski authored
This patch enhances VIVI driver with a support for importing a buffer from DMABUF file descriptors. Signed-off-by:
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Tomasz Stanislawski authored
This patch adds support for importing DMABUF files for vmalloc allocator in Videobuf2. Signed-off-by:
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Sumit Semwal authored
This patch makes changes for adding dma-contig as a dma_buf user. It provides function implementations for the {attach, detach, map, unmap}_dmabuf() mem_ops of DMABUF memory type. [author of the original patch] [integration with refactored dma-contig allocator] Signed-off-by:Sumit Semwal <sumit.semwal@ti.com> Signed-off-by:
Sumit Semwal <sumit.semwal@linaro.org> Signed-off-by:
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Marek Szyprowski authored
Add prepare/finish callbacks to vb2-dma-contig allocator. Signed-off-by:
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Marek Szyprowski authored
This patch adds support for prepare/finish callbacks in VB2 allocators. These callback are used for buffer flushing. Signed-off-by:
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Tomasz Stanislawski authored
This patch introduces usage of dma_map_sg to map memory behind a userspace pointer to a device as dma-contiguous mapping. This patch contains some of the code kindly provided by Marek Szyprowski <m.szyprowski@samsung.com> and Kamil Debski <k.debski@samsung.com> and Andrzej Pietrasiewicz <andrzej.p@samsung.com>. Kind thanks for bug reports from Laurent Pinchart <laurent.pinchart@ideasonboard.com> and Seung-Woo Kim <sw0312.kim@samsung.com>. Signed-off-by:
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Laurent Pinchart authored
Group functions by buffer type. Signed-off-by:
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Tomasz Stanislawski authored
This patch removes a reference to alloc_ctx from an instance of a DMA contiguous buffer. It helps to avoid a risk of a dangling pointer if the context is released while the buffer is still valid. Moreover it removes one dereference step while accessing a device structure. Signed-off-by:
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Laurent Pinchart authored
Signed-off-by:
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Sumit Semwal authored
Adding DMABUF memory type causes videobuf to complain about not using it in some switch cases. This patch removes these warnings. Signed-off-by:
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Sumit Semwal authored
This patch adds support for DMABUF memory type in videobuf2. It calls relevant APIs of dma_buf for v4l reqbuf / qbuf / dqbuf operations. For this version, the support is for videobuf2 as a user of the shared buffer; so the allocation of the buffer is done outside of V4L2. [A sample allocator of dma-buf shared buffer is given at [1]] [1]: Rob Clark's DRM: https://github.com/robclark/kernel-omap4/commits/drmplane-dmabuf [original work in the PoC for buffer sharing] Signed-off-by:
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Tomasz Stanislawski authored
This patch adds description and usage examples for importing DMABUF file descriptor in V4L2. Signed-off-by:
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Sumit Semwal authored
Adds DMABUF memory type to v4l framework. Also adds the related file descriptor in v4l2_plane and v4l2_buffer. [original work in the PoC for buffer sharing] Signed-off-by:
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- 23 Nov, 2012 2 commits
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Mauro Carvalho Chehab authored
As reported by Stephen: After merging the v4l-dvb tree, today's linux-next build (x86_64 allmodconfig) failed like this: ERROR: "sms_ir_exit" [drivers/media/common/siano/smsmdtv.ko] undefined! ERROR: "sms_ir_event" [drivers/media/common/siano/smsmdtv.ko] undefined! ERROR: "sms_ir_init" [drivers/media/common/siano/smsmdtv.ko] undefined! The smsir file should be part of the smsmdtv core, if RC is defined. Fix it. Reported-by:Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
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Mauro Carvalho Chehab authored
This reverts commit 6ee28d94. The patch got some alien code there, not sure why. Revert it to apply it properly. Signed-off-by:
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- 22 Nov, 2012 13 commits
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Rémi Cardona authored
Since b9bf2eaf, the function ds3000_firmware_ondemand() is called only once during init. This locking scheme may have been useful when the firmware was loaded at each tune. Furthermore, it looks like this 'lock' was put in to prevent concurrent access (and not recursion as the comments suggest). However, this open- coded mechanism is anything but race-free and should have used a proper mutex. Signed-off-by:
Rémi Cardona <remi.cardona@smartjog.com> Reviewed-by:
Antti Palosaari <crope@iki.fi> Signed-off-by:
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Rémi Cardona authored
Signed-off-by:
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Peter Senna Tschudin authored
Replace kmemdup for kstrdup and cleanup related code. Signed-off-by:
Peter Senna Tschudin <peter.senna@gmail.com> Signed-off-by:
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Peter Senna Tschudin authored
The function cx25821_sram_channel_setup_upstream_audio always return zero, so the return value is not saved any more. Convert a nonnegative error return code to a negative one, as returned elsewhere in the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> ( if@p1 (\(ret < 0\|ret != 0\)) { ... return ret; } | ret@p1 = 0 ) ... when != ret = e1 when != &ret *if(...) { ... when != ret = e2 when forall return ret; } // </smpl> Signed-off-by:
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Peter Senna Tschudin authored
Convert a nonnegative error return code to a negative one, as returned elsewhere in the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> ( if@p1 (\(ret < 0\|ret != 0\)) { ... return ret; } | ret@p1 = 0 ) ... when != ret = e1 when != &ret *if(...) { ... when != ret = e2 when forall return ret; } // </smpl> While here, replace strlen()+kmemdup() to kstrdup(). Signed-off-by:
walter harms <wharms@bfs.de> Signed-off-by:
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Peter Senna Tschudin authored
Convert a nonnegative error return code to a negative one, as returned elsewhere in the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> ( if@p1 (\(ret < 0\|ret != 0\)) { ... return ret; } | ret@p1 = 0 ) ... when != ret = e1 when != &ret *if(...) { ... when != ret = e2 when forall return ret; } // </smpl> Signed-off-by:
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Peter Senna Tschudin authored
Convert a nonnegative error return code to a negative one, as returned elsewhere in the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> ( if@p1 (\(ret < 0\|ret != 0\)) { ... return ret; } | ret@p1 = 0 ) ... when != ret = e1 when != &ret *if(...) { ... when != ret = e2 when forall return ret; } // </smpl> Signed-off-by:
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Peter Senna Tschudin authored
Convert a nonnegative error return code to a negative one, as returned elsewhere in the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> ( if@p1 (\(ret < 0\|ret != 0\)) { ... return ret; } | ret@p1 = 0 ) ... when != ret = e1 when != &ret *if(...) { ... when != ret = e2 when forall return ret; } // </smpl> Signed-off-by:
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Peter Senna Tschudin authored
Convert a nonnegative error return code to a negative one, as returned elsewhere in the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> ( if@p1 (\(ret < 0\|ret != 0\)) { ... return ret; } | ret@p1 = 0 ) ... when != ret = e1 when != &ret *if(...) { ... when != ret = e2 when forall return ret; } // </smpl> Signed-off-by:
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Peter Senna Tschudin authored
Convert a nonnegative error return code to a negative one, as returned elsewhere in the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> ( if@p1 (\(ret < 0\|ret != 0\)) { ... return ret; } | ret@p1 = 0 ) ... when != ret = e1 when != &ret *if(...) { ... when != ret = e2 when forall return ret; } // </smpl> Signed-off-by:
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Peter Senna Tschudin authored
Convert a nonnegative error return code to a negative one, as returned elsewhere in the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> ( if@p1 (\(ret < 0\|ret != 0\)) { ... return ret; } | ret@p1 = 0 ) ... when != ret = e1 when != &ret *if(...) { ... when != ret = e2 when forall return ret; } // </smpl> Signed-off-by:
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Peter Senna Tschudin authored
Convert a nonnegative error return code to a negative one, as returned elsewhere in the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> ( if@p1 (\(ret < 0\|ret != 0\)) { ... return ret; } | ret@p1 = 0 ) ... when != ret = e1 when != &ret *if(...) { ... when != ret = e2 when forall return ret; } // </smpl> Signed-off-by:
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Hans Verkuil authored
The dma_queue list is accessed by both the interrupt handler and by normal code. It needs to be protected by a lock to prevent possible list corruption. Corruption has been observed in 'real-life' conditions. Adding this lock made it go away. Signed-off-by:
Lad, Prabhakar <prabhakar.lad@ti.com> Signed-off-by:
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