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  1. 29 12月, 2017 34 次提交
  3. 28 12月, 2017 1 次提交
    • S
      media: videobuf2: Add new uAPI for DVB streaming I/O · 57868acc
      由 Satendra Singh Thakur 提交于 
      Adds a new uAPI for DVB to use streaming I/O which is implemented
based on videobuf2, using those new ioctls:

- DMX_REQBUFS:  Request kernel to allocate buffers which count and size
	        are dedicated by user.
- DMX_QUERYBUF: Get the buffer information like a memory offset which
		will mmap() and be shared with user-space.
- DMX_EXPBUF:   Just for testing whether buffer-exporting success or not.
- DMX_QBUF:     Pass the buffer to kernel-space.
- DMX_DQBUF:    Get back the buffer which may contain TS data.

Originally developed by: Junghak Sung <jh1009.sung@samsung.com>, as
seen at:
	https://patchwork.linuxtv.org/patch/31613/
	https://patchwork.kernel.org/patch/7334301/

The original patch was written before merging VB2-core functionalities
upstream. When such series was added, several adjustments were made,
fixing some issues with	V4L2, causing the original patch to be
non-trivially rebased.

After rebased, a few bugs in the patch were fixed. The patch was
also enhanced it and polling functionality got added.

The main changes over the original patch are:

dvb_vb2_fill_buffer():
	- Set the size of the outgoing buffer after while loop using
	  vb2_set_plane_payload;

	- Added NULL check for source buffer as per normal convention
	  of demux driver, this is called twice, first time with valid
	  buffer second time with NULL pointer, if its not handled,
	  it will result in  crash

	- Restricted spinlock for only list_* operations

dvb_vb2_init():
	- Restricted q->io_modes to only VB2_MMAP as its the only
	  supported mode

dvb_vb2_release():
	- Replaced the && in if condiion with &, because otherwise
	  it was always getting satisfied.

dvb_vb2_stream_off():
	- Added list_del code for enqueud buffers upon stream off

dvb_vb2_poll():
	- Added this new function in order to support polling

dvb_demux_poll() and dvb_dvr_poll()
	- dvb_vb2_poll() is now called from these functions

- Ported this patch and latest videobuf2 to lower kernel versions and
  tested auto scan.
Co-developed-by: NJunghak Sung <jh1009.sung@samsung.com>

[mchehab@s-opensource.com: checkpatch fixes]
Signed-off-by: NJunghak Sung <jh1009.sung@samsung.com>
Signed-off-by: NGeunyoung Kim <nenggun.kim@samsung.com>
Acked-by: NSeung-Woo Kim <sw0312.kim@samsung.com>
Acked-by: NInki Dae <inki.dae@samsung.com>
Signed-off-by: NSatendra Singh Thakur <satendra.t@samsung.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>
      57868acc
  5. 23 12月, 2017 1 次提交
    • M
      Merge branch 'docs-next' of git://git.lwn.net/linux into patchwork · 9eb124fe
      由 Mauro Carvalho Chehab 提交于 
      * 'docs-next' of git://git.lwn.net/linux: (888 commits)
  w1_netlink.h: add support for nested structs
  scripts: kernel-doc: apply filtering rules to warnings
  scripts: kernel-doc: improve nested logic to handle multiple identifiers
  scripts: kernel-doc: handle nested struct function arguments
  scripts: kernel-doc: print the declaration name on warnings
  scripts: kernel-doc: get rid of $nested parameter
  scripts: kernel-doc: parse next structs/unions
  scripts: kernel-doc: replace tabs by spaces
  scripts: kernel-doc: change default to ReST format
  scripts: kernel-doc: improve argument handling
  scripts: kernel-doc: get rid of unused output formats
  docs: get rid of kernel-doc-nano-HOWTO.txt
  docs: kernel-doc.rst: add documentation about man pages
  docs: kernel-doc.rst: improve typedef documentation
  docs: kernel-doc.rst: improve structs chapter
  docs: kernel-doc.rst: improve function documentation section
  docs: kernel-doc.rst: improve private members description
  docs: kernel-doc.rst: better describe kernel-doc arguments
  docs: fix process/submit-checklist.rst Sphinx warning
  docs: ftrace-uses.rst fix varios code-block directives
  ...
      9eb124fe
  7. 22 12月, 2017 4 次提交
    • M
      w1_netlink.h: add support for nested structs · aa931b44
      由 Mauro Carvalho Chehab 提交于 
      Now that kernel-doc can hanle nested structs/unions, describe
such fields at w1_netlink_message_types.
Acked-by: NEvgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>
      aa931b44
    • M
      scripts: kernel-doc: apply filtering rules to warnings · 2defb272
      由 Mauro Carvalho Chehab 提交于 
      When kernel-doc is called with output selection filters,
it will be called lots of time for a single file. If
there is a warning present there, it means that it may
print hundreds of identical warnings.

Worse than that, the -function NAME actually filters only
functions. So, it makes no sense at all to print warnings
for structs or enums.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>
      2defb272
    • M
      scripts: kernel-doc: improve nested logic to handle multiple identifiers · 84ce5b98
      由 Mauro Carvalho Chehab 提交于 
      It is possible to use nested structs like:

struct {
	struct {
		void *arg1;
	} st1, st2, *st3, st4;
};

Handling it requires to split each parameter. Change the logic
to allow such definitions.

In order to test the new nested logic, the following file
was used to test

<code>
struct foo { int a; }; /* Just to avoid errors if compiled */

/**
 * struct my_struct - a struct with nested unions and structs
 * @arg1: first argument of anonymous union/anonymous struct
 * @arg2: second argument of anonymous union/anonymous struct
 * @arg1b: first argument of anonymous union/anonymous struct
 * @arg2b: second argument of anonymous union/anonymous struct
 * @arg3: third argument of anonymous union/anonymous struct
 * @arg4: fourth argument of anonymous union/anonymous struct
 * @bar.st1.arg1: first argument of struct st1 on union bar
 * @bar.st1.arg2: second argument of struct st1 on union bar
 * @bar.st1.bar1: bar1 at st1
 * @bar.st1.bar2: bar2 at st1
 * @bar.st2.arg1: first argument of struct st2 on union bar
 * @bar.st2.arg2: second argument of struct st2 on union bar
 * @bar.st3.arg2: second argument of struct st3 on union bar
 * @f1: nested function on anonimous union/struct
 * @bar.st2.f2: nested function on named union/struct
 */
struct my_struct {
   /* Anonymous union/struct*/
   union {
	struct {
	    char arg1 : 1;
	    char arg2 : 3;
	};
       struct {
           int arg1b;
           int arg2b;
       };
       struct {
           void *arg3;
           int arg4;
           int (*f1)(char foo, int bar);
       };
   };
   union {
       struct {
           int arg1;
           int arg2;
	   struct foo bar1, *bar2;
       } st1;           /* bar.st1 is undocumented, cause a warning */
       struct {
           void *arg1;  /* bar.st3.arg1 is undocumented, cause a warning */
	    int arg2;
          int (*f2)(char foo, int bar); /* bar.st3.fn2 is undocumented, cause a warning */
       } st2, st3, *st4;
       int (*f3)(char foo, int bar); /* f3 is undocumented, cause a warning */
   } bar;               /* bar is undocumented, cause a warning */

   /* private: */
   int undoc_privat;    /* is undocumented but private, no warning */

   /* public: */
   int undoc_public;    /* is undocumented, cause a warning */
};
</code>

It produces the following warnings, as expected:

test2.h:57: warning: Function parameter or member 'bar' not described in 'my_struct'
test2.h:57: warning: Function parameter or member 'bar.st1' not described in 'my_struct'
test2.h:57: warning: Function parameter or member 'bar.st2' not described in 'my_struct'
test2.h:57: warning: Function parameter or member 'bar.st3' not described in 'my_struct'
test2.h:57: warning: Function parameter or member 'bar.st3.arg1' not described in 'my_struct'
test2.h:57: warning: Function parameter or member 'bar.st3.f2' not described in 'my_struct'
test2.h:57: warning: Function parameter or member 'bar.st4' not described in 'my_struct'
test2.h:57: warning: Function parameter or member 'bar.st4.arg1' not described in 'my_struct'
test2.h:57: warning: Function parameter or member 'bar.st4.arg2' not described in 'my_struct'
test2.h:57: warning: Function parameter or member 'bar.st4.f2' not described in 'my_struct'
test2.h:57: warning: Function parameter or member 'bar.f3' not described in 'my_struct'
test2.h:57: warning: Function parameter or member 'undoc_public' not described in 'my_struct'
Suggested-by: NMarkus Heiser <markus.heiser@darmarit.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>
      84ce5b98
    • M
      scripts: kernel-doc: handle nested struct function arguments · 7c0d7e87
      由 Mauro Carvalho Chehab 提交于 
      Function arguments are different than usual ones. So, an
special logic is needed in order to handle such arguments
on nested structs.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>
      7c0d7e87