linux.git/drivers/media/platform, branch v5.0-rc2

cross-tree: phase out dma_zalloc_coherent()

2019-01-08T12:58:37+00:00

We already need to zero out memory for dma_alloc_coherent(), as such
using dma_zalloc_coherent() is superflous. Phase it out.

This change was generated with the following Coccinelle SmPL patch:

@ replace_dma_zalloc_coherent @
expression dev, size, data, handle, flags;
@@

-dma_zalloc_coherent(dev, size, handle, flags)
+dma_alloc_coherent(dev, size, handle, flags)

Suggested-by: Christoph Hellwig 
Signed-off-by: Luis Chamberlain 
[hch: re-ran the script on the latest tree]
Signed-off-by: Christoph Hellwig

mm: convert totalram_pages and totalhigh_pages variables to atomic

2018-12-28T20:11:47+00:00

totalram_pages and totalhigh_pages are made static inline function.

Main motivation was that managed_page_count_lock handling was complicating
things.  It was discussed in length here,
https://lore.kernel.org/patchwork/patch/995739/#1181785 So it seemes
better to remove the lock and convert variables to atomic, with preventing
poteintial store-to-read tearing as a bonus.

[akpm@linux-foundation.org: coding style fixes]
Link: http://lkml.kernel.org/r/1542090790-21750-4-git-send-email-arunks@codeaurora.org
Signed-off-by: Arun KS 
Suggested-by: Michal Hocko 
Suggested-by: Vlastimil Babka 
Reviewed-by: Konstantin Khlebnikov 
Reviewed-by: Pavel Tatashin 
Acked-by: Michal Hocko 
Acked-by: Vlastimil Babka 
Cc: David Hildenbrand 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge tag 'v4.20-rc7' into patchwork

2018-12-17T15:34:24+00:00

Linux 4.20-rc7

* tag 'v4.20-rc7': (403 commits)
  Linux 4.20-rc7
  scripts/spdxcheck.py: always open files in binary mode
  checkstack.pl: fix for aarch64
  userfaultfd: check VM_MAYWRITE was set after verifying the uffd is registered
  fs/iomap.c: get/put the page in iomap_page_create/release()
  hugetlbfs: call VM_BUG_ON_PAGE earlier in free_huge_page()
  memblock: annotate memblock_is_reserved() with __init_memblock
  psi: fix reference to kernel commandline enable
  arch/sh/include/asm/io.h: provide prototypes for PCI I/O mapping in asm/io.h
  mm/sparse: add common helper to mark all memblocks present
  mm: introduce common STRUCT_PAGE_MAX_SHIFT define
  alpha: fix hang caused by the bootmem removal
  XArray: Fix xa_alloc when id exceeds max
  drm/vmwgfx: Protect from excessive execbuf kernel memory allocations v3
  MAINTAINERS: Daniel for drm co-maintainer
  drm/amdgpu: drop fclk/gfxclk ratio setting
  IB/core: Fix oops in netdev_next_upper_dev_rcu()
  dm thin: bump target version
  drm/vmwgfx: remove redundant return ret statement
  drm/i915: Flush GPU relocs harder for gen3
  ...

media: platform: Add Aspeed Video Engine driver

2018-12-12T17:05:12+00:00

The Video Engine (VE) embedded in the Aspeed AST2400 and AST2500 SOCs
can capture and compress video data from digital or analog sources. With
the Aspeed chip acting a service processor, the Video Engine can capture
the host processor graphics output.

Add a V4L2 driver to capture video data and compress it to JPEG images.
Make the video frames available through the V4L2 streaming interface.

Signed-off-by: Eddie James 
Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: vimc: fix start stream when link is disabled

2018-12-07T18:08:41+00:00

If link is disabled, media_entity_remote_pad returns NULL, causing a
NULL pointer deference.
Ignore links that are not enabled instead.

Signed-off-by: Helen Koike 
Signed-off-by: Mauro Carvalho Chehab

media: vivid: Improve timestamping

2018-12-07T13:30:33+00:00

Simulate a more precise timestamp by calculating it based on the
current framerate.

Signed-off-by: Gabriel Francisco Mandaji 
Signed-off-by: Hans Verkuil 
[hverkuil-cisco@xs4all.nl: replaced division by 2 with bit shift]
Signed-off-by: Mauro Carvalho Chehab

media: rcar-vin: add R8A77980 support

2018-12-07T13:29:59+00:00

Add the R8A77980 SoC support to the R-Car VIN driver.

Signed-off-by: Sergei Shtylyov 
Acked-by: Niklas Söderlund 
Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: rcar-csi2: add R8A77980 support

2018-12-07T13:29:29+00:00

Add the R-Car V3H (AKA R8A77980) SoC support to the R-Car CSI2 driver.

Signed-off-by: Sergei Shtylyov 
Acked-by: Rob Herring 
Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: Use of_node_name_eq for node name comparisons

2018-12-07T13:28:54+00:00

Convert string compares of DT node names to use of_node_name_eq helper
instead. This removes direct access to the node name pointer.

Cc: Kyungmin Park 
Cc: Kukjin Kim 
Cc: Krzysztof Kozlowski 
Cc: Hyun Kwon 
Cc: Michal Simek 
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Reviewed-by: Laurent Pinchart 
Reviewed-by: Benoit Parrot 
Signed-off-by: Rob Herring 
Reviewed-by: Sylwester Nawrocki 
Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: venus: core: Set dma maximum segment size

2018-12-07T13:28:10+00:00

Turning on CONFIG_DMA_API_DEBUG_SG results in the following error:

[  460.308650] ------------[ cut here ]------------
[  460.313490] qcom-venus aa00000.video-codec: DMA-API: mapping sg segment longer than device claims to support [len=4194304] [max=65536]
[  460.326017] WARNING: CPU: 3 PID: 3555 at src/kernel/dma/debug.c:1301 debug_dma_map_sg+0x174/0x254
[  460.338888] Modules linked in: venus_dec venus_enc videobuf2_dma_sg videobuf2_memops hci_uart btqca bluetooth venus_core v4l2_mem2mem videobuf2_v4l2 videobuf2_common ath10k_snoc ath10k_core ath lzo lzo_compress zramjoydev
[  460.375811] CPU: 3 PID: 3555 Comm: V4L2DecoderThre Tainted: G        W         4.19.1 #82
[  460.384223] Hardware name: Google Cheza (rev1) (DT)
[  460.389251] pstate: 60400009 (nZCv daif +PAN -UAO)
[  460.394191] pc : debug_dma_map_sg+0x174/0x254
[  460.398680] lr : debug_dma_map_sg+0x174/0x254
[  460.403162] sp : ffffff80200c37d0
[  460.406583] x29: ffffff80200c3830 x28: 0000000000010000
[  460.412056] x27: 00000000ffffffff x26: ffffffc0f785ea80
[  460.417532] x25: 0000000000000000 x24: ffffffc0f4ea1290
[  460.423001] x23: ffffffc09e700300 x22: ffffffc0f4ea1290
[  460.428470] x21: ffffff8009037000 x20: 0000000000000001
[  460.433936] x19: ffffff80091b0000 x18: 0000000000000000
[  460.439411] x17: 0000000000000000 x16: 000000000000f251
[  460.444885] x15: 0000000000000006 x14: 0720072007200720
[  460.450354] x13: ffffff800af536e0 x12: 0000000000000000
[  460.455822] x11: 0000000000000000 x10: 0000000000000000
[  460.461288] x9 : 537944d9c6c48d00 x8 : 537944d9c6c48d00
[  460.466758] x7 : 0000000000000000 x6 : ffffffc0f8d98f80
[  460.472230] x5 : 0000000000000000 x4 : 0000000000000000
[  460.477703] x3 : 000000000000008a x2 : ffffffc0fdb13948
[  460.483170] x1 : ffffffc0fdb0b0b0 x0 : 000000000000007a
[  460.488640] Call trace:
[  460.491165]  debug_dma_map_sg+0x174/0x254
[  460.495307]  vb2_dma_sg_alloc+0x260/0x2dc [videobuf2_dma_sg]
[  460.501150]  __vb2_queue_alloc+0x164/0x374 [videobuf2_common]
[  460.507076]  vb2_core_reqbufs+0xfc/0x23c [videobuf2_common]
[  460.512815]  vb2_reqbufs+0x44/0x5c [videobuf2_v4l2]
[  460.517853]  v4l2_m2m_reqbufs+0x44/0x78 [v4l2_mem2mem]
[  460.523144]  v4l2_m2m_ioctl_reqbufs+0x1c/0x28 [v4l2_mem2mem]
[  460.528976]  v4l_reqbufs+0x30/0x40
[  460.532480]  __video_do_ioctl+0x36c/0x454
[  460.536610]  video_usercopy+0x25c/0x51c
[  460.540572]  video_ioctl2+0x38/0x48
[  460.544176]  v4l2_ioctl+0x60/0x74
[  460.547602]  do_video_ioctl+0x948/0x3520
[  460.551648]  v4l2_compat_ioctl32+0x60/0x98
[  460.555872]  __arm64_compat_sys_ioctl+0x134/0x20c
[  460.560718]  el0_svc_common+0x9c/0xe4
[  460.564498]  el0_svc_compat_handler+0x2c/0x38
[  460.568982]  el0_svc_compat+0x8/0x18
[  460.572672] ---[ end trace ce209b87b2f3af88 ]---

>From above warning one would deduce that the sg segment will overflow
the device's capacity. In reality, the hardware can accommodate larger
sg segments.
So, initialize the max segment size properly to weed out this warning.

Based on a similar patch sent by Sean Paul for mdss:
https://patchwork.kernel.org/patch/10671457/

Signed-off-by: Vivek Gautam 
Acked-by: Stanimir Varbanov 
Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab