platform/kernel/linux-starfive.git
8 years ago[media] v4l: mt9v032: Do not unset master_mode
Markus Pargmann [Mon, 14 Dec 2015 14:41:52 +0000 (12:41 -0200)]
[media] v4l: mt9v032: Do not unset master_mode

The power_on function of the driver resets the chip and sets the
CHIP_CONTROL register to 0. This switches the operating mode to slave.
The s_stream function sets the correct mode. But this caused problems on
a board where the camera chip is operated as master. The camera started
after a random amount of time streaming an image, I observed between 10
and 300 seconds.

The STRFM_OUT and STLN_OUT pins are not connected on this board which
may cause some issues in slave mode. I could not find any documentation
about this.

Keeping the chip in master mode after the reset helped to fix this
issue for me.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] v4l: mt9v032: Remove duplicate test for I2C_FUNC_SMBUS_WORD_DATA functionality
Axel Lin [Sun, 10 Aug 2014 09:41:49 +0000 (06:41 -0300)]
[media] v4l: mt9v032: Remove duplicate test for I2C_FUNC_SMBUS_WORD_DATA functionality

Since commit b42261078a91 ("regmap: i2c: fallback to SMBus if the adapter
does not support standard I2C"), regmap-i2c will check the
I2C_FUNC_SMBUS_[BYTE|WORD]_DATA functionality based on the regmap_config
setting if the adapter does not support standard I2C.

So remove the I2C_FUNC_SMBUS_WORD_DATA functionality check in the driver code.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] v4l: mt9v032: Remove unneeded header
Laurent Pinchart [Mon, 9 Nov 2015 14:36:48 +0000 (12:36 -0200)]
[media] v4l: mt9v032: Remove unneeded header

The of_gpio.h header isn't needed, don't include it.

Reported-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] v4l: mt9t001: fix clean up in case of power-on failures
Guennadi Liakhovetski [Mon, 14 Dec 2015 09:58:29 +0000 (07:58 -0200)]
[media] v4l: mt9t001: fix clean up in case of power-on failures

If the driver fails to reset the camera or to set up control handlers, it
has to power the camera back off.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] v4l: mt9t001: constify v4l2_subdev_internal_ops structure
Julia Lawall [Sun, 11 Oct 2015 11:57:13 +0000 (08:57 -0300)]
[media] v4l: mt9t001: constify v4l2_subdev_internal_ops structure

This v4l2_subdev_internal_ops structure is never modified.  All other
v4l2_subdev_internal_ops structures are declared as const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] smiapp: Remove useless rval assignment in smiapp_get_pdata()
Sakari Ailus [Fri, 10 Apr 2015 22:42:47 +0000 (19:42 -0300)]
[media] smiapp: Remove useless rval assignment in smiapp_get_pdata()

The value is not used after the assignment.

Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] tw686x: be explicit about the possible dma_mode options
Hans Verkuil [Mon, 27 Jun 2016 08:28:59 +0000 (05:28 -0300)]
[media] tw686x: be explicit about the possible dma_mode options

Users won't know what to put in this module option if it isn't
described.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] tw686x: audio: Prevent hw param changes while busy
Ezequiel Garcia [Sat, 4 Jun 2016 23:47:20 +0000 (20:47 -0300)]
[media] tw686x: audio: Prevent hw param changes while busy

Audio hw params are shared across all DMA channels,
so if the user changes any of these while any DMA channel is
enabled, it will impact the enabled channels, potentially causing
serious instability issues.

This commit avoids such situation, by preventing any hw param
change (on any DMA channel) if any other DMA audio channel is capturing.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] tw686x: audio: Allow to configure the period size
Ezequiel Garcia [Sat, 4 Jun 2016 23:47:19 +0000 (20:47 -0300)]
[media] tw686x: audio: Allow to configure the period size

Currently, the driver has a fixed period size of 4096 bytes
(2048 frames). Since this hardware can configure the audio
capture size, this commit allows a period size range of [512-4096].

This is very useful to reduce the audio latency.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] tw686x: audio: Implement non-memcpy capture
Ezequiel Garcia [Sat, 4 Jun 2016 23:47:18 +0000 (20:47 -0300)]
[media] tw686x: audio: Implement non-memcpy capture

Now that we've introduced the dma_mode parameter to pick the
DMA operation, let's use it to also select the audio DMA
operation.

When dma_mode != memcpy, the driver will avoid using memcpy
in the audio capture path, and the DMA hardware operation
will act directly on the ALSA buffers.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] tw686x: Add support for DMA scatter-gather mode
Ezequiel Garcia [Sat, 4 Jun 2016 23:47:17 +0000 (20:47 -0300)]
[media] tw686x: Add support for DMA scatter-gather mode

Now that the driver has the infrastructure to support more
DMA modes, let's add the DMA scatter-gather mode.

In this mode, the device delivers sequential top-bottom
frames. The scatter-gather logic is based on staging's
tw686x-kh driver (by Krzysztof Ha?asa).

Tested-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] tw686x: Add support for DMA contiguous interlaced frame mode
Ezequiel Garcia [Sat, 4 Jun 2016 23:47:16 +0000 (20:47 -0300)]
[media] tw686x: Add support for DMA contiguous interlaced frame mode

Now that the driver has the infrastructure to support more
DMA modes, let's add the DMA contiguous interlaced frame mode.

In this mode, the DMA P and B buffers are programmed with
the user-provided buffers. When a P (or B) frame is ready,
a new buffer is dequeued into P (or B).

In addition to interlaced fields, the device can also be
programmed to deliver alternate fields. Only interlaced
mode is supported for now.

Tested-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] tw686x: Introduce an interface to support multiple DMA modes
Ezequiel Garcia [Sat, 4 Jun 2016 23:47:15 +0000 (20:47 -0300)]
[media] tw686x: Introduce an interface to support multiple DMA modes

Let's set the corner stone to support all the DMA modes
available on this device.

For stability reasons, the driver is currently setting DMA frame
mode, and using single DMA buffers to get the P and B buffers.
Each frame is then memcpy'ed into the user buffer.

However, other platforms might be interested in avoiding this
memcpy, or in taking advantage of the chip's DMA scatter-gather
capabilities.

To achieve this, this commit introduces a "dma_mode" module parameter,
and a tw686x_dma_ops struct. This will allow to define functions to
alloc/free DMA buffers, and to return the frames to userspace.

The memcpy-based method described above is named as dma_mode="memcpy".
Current alloc/free functions are renamed as tw686x_memcpy_xxx,
and are now used through a memcpy_dma_ops.

Tested-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agobdisp: move the V/H filter spec to bdisp-hw.c
Mauro Carvalho Chehab [Fri, 24 Jun 2016 15:27:51 +0000 (12:27 -0300)]
bdisp: move the V/H filter spec to bdisp-hw.c

Those structs are used only at bdisp-hw, so they shouldn't be
there in a header file that it is used elsewhere.

This fixes the following Gcc 6.1 warnings:

In file included from drivers/media/platform/sti/bdisp/bdisp-debug.c:11:0:
drivers/media/platform/sti/bdisp/bdisp-filter.h:207:65: warning: ‘bdisp_v_spec’ defined but not used [-Wunused-const-variable=]
 static const struct __maybe_unused bdisp_filter_v_spec bdisp_v_spec[] = {
                                                                 ^~~~~~~~~
In file included from drivers/media/platform/sti/bdisp/bdisp-debug.c:11:0:
drivers/media/platform/sti/bdisp/bdisp-filter.h:23:65: warning: ‘bdisp_h_spec’ defined but not used [-Wunused-const-variable=]
 static const struct __maybe_unused bdisp_filter_h_spec bdisp_h_spec[] = {
                                                                 ^~~~~~~~~

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agoadv7842: comment out a table useful for debug
Mauro Carvalho Chehab [Fri, 24 Jun 2016 15:17:27 +0000 (12:17 -0300)]
adv7842: comment out a table useful for debug

Gcc 6.1 warns about an unused table:

drivers/media/i2c/adv7842.c:2400:27: warning: 'prim_mode_txt' defined but not used [-Wunused-const-variable=]
 static const char * const prim_mode_txt[] = {
                           ^~~~~~~~~~~~~

That seems to be useful for debug, and likely were used before.
While we could simply remove, let's comment it out, for now.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agoem28xx-dvb: remove some left over
Mauro Carvalho Chehab [Fri, 24 Jun 2016 15:10:55 +0000 (12:10 -0300)]
em28xx-dvb: remove some left over

Gcc 6.1 warns about an unused table:

drivers/media/usb/em28xx/em28xx-dvb.c:907:38: warning: 'pctv_461e_m88ds3103_config' defined but not used [-Wunused-const-variable=]
 static const struct m88ds3103_config pctv_461e_m88ds3103_config = {
                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~

That's a left over of patch 76b91be3d360a ('em28xx: PCTV 461e use I2C
client for demod and SEC').

Remove the dead code.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agovivid: remove some unused vars
Mauro Carvalho Chehab [Fri, 24 Jun 2016 15:09:49 +0000 (12:09 -0300)]
vivid: remove some unused vars

Gcc 6.1 warns about some unused vars. Remove them:
drivers/media/platform/vivid/vivid-vid-cap.c:40:2: warning: 'tpf_default' defined but not used [-Wunused-const-variable=]
  tpf_default = {.numerator = 1,  .denominator = 30};
  ^~~~~~~~~~~
drivers/media/platform/vivid/vivid-sdr-cap.c:54:27: warning: 'NUM_FORMATS' defined but not used [-Wunused-const-variable=]
 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
                           ^~~~~~~~~~~

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agozr36016: remove some unused tables
Mauro Carvalho Chehab [Fri, 24 Jun 2016 15:02:11 +0000 (12:02 -0300)]
zr36016: remove some unused tables

Gcc 6.1 warns about some unused tables:

drivers/media/pci/zoran/zr36016.c:251:18: warning: 'zr016_yoff' defined but not used [-Wunused-const-variable=]
 static const int zr016_yoff[] = { 8, 9, 7 };
                  ^~~~~~~~~~
drivers/media/pci/zoran/zr36016.c:250:18: warning: 'zr016_xoff' defined but not used [-Wunused-const-variable=]
 static const int zr016_xoff[] = { 20, 20, 20 };
                  ^~~~~~~~~~

Those tables aren't used anywere. So, remove them.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agor820t: comment out two ancillary tables
Mauro Carvalho Chehab [Fri, 24 Jun 2016 15:00:02 +0000 (12:00 -0300)]
r820t: comment out two ancillary tables

As Gcc6.1 warned, those tables are currently unused:
drivers/media/tuners/r820t.c:349:18: warning: 'r820t_mixer_gain_steps' defined but not used [-Wunused-const-variable=]
 static const int r820t_mixer_gain_steps[]  = {
                  ^~~~~~~~~~~~~~~~~~~~~~
drivers/media/tuners/r820t.c:345:18: warning: 'r820t_lna_gain_steps' defined but not used [-Wunused-const-variable=]
 static const int r820t_lna_gain_steps[]  = {
                  ^~~~~~~~~~~~~~~~~~~~

They're actually used only by a routine that it is currently
commented out. So, move those tables to be together with such
code and comment them out.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agodib0090: comment out the unused tables
Mauro Carvalho Chehab [Fri, 24 Jun 2016 14:12:17 +0000 (11:12 -0300)]
dib0090: comment out the unused tables

Those tables are currently unused, so comment them out:

drivers/media/dvb-frontends/dib0090.c:852:18: warning: 'rf_ramp_pwm_sband' defined but not used [-Wunused-const-variable=]
 static const u16 rf_ramp_pwm_sband[] = {
                  ^~~~~~~~~~~~~~~~~
drivers/media/dvb-frontends/dib0090.c:800:18: warning: 'bb_ramp_pwm_boost' defined but not used [-Wunused-const-variable=]
 static const u16 bb_ramp_pwm_boost[] = {
                  ^~~~~~~~~~~~~~~~~

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agodrxj: comment out the unused nicam_presc_table_val table
Mauro Carvalho Chehab [Fri, 24 Jun 2016 14:10:16 +0000 (11:10 -0300)]
drxj: comment out the unused nicam_presc_table_val table

Avoid this warning:

drivers/media/dvb-frontends/drx39xyj/drxj.c:1243:18: warning: 'nicam_presc_table_val' defined but not used [-Wunused-const-variable=]
 static const u16 nicam_presc_table_val[43] = {
                  ^~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agocx25821-alsa: shutup a Gcc 6.1 warning
Mauro Carvalho Chehab [Fri, 24 Jun 2016 12:46:54 +0000 (09:46 -0300)]
cx25821-alsa: shutup a Gcc 6.1 warning

The PCI device ID table is only used if compiled with modules
support. When compiled with modules disabled, this is now
producing this bogus warning:

drivers/media/pci/cx25821/cx25821-alsa.c:696:35: warning: 'cx25821_audio_pci_tbl' defined but not used [-Wunused-const-variable=]
 static const struct pci_device_id cx25821_audio_pci_tbl[] = {
                                   ^~~~~~~~~~~~~~~~~~~~~

Fix it by annotating that the function may not be used.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agom5602_ov7660: move skeletons to the .c file
Mauro Carvalho Chehab [Fri, 24 Jun 2016 12:37:43 +0000 (09:37 -0300)]
m5602_ov7660: move skeletons to the .c file

The header file has some private static structures that
are used only by the C file. Move those structures to the C file,
in order to shut up gcc 6.1 warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agom5602_po1030: move skeletons to the .c file
Mauro Carvalho Chehab [Fri, 24 Jun 2016 12:36:43 +0000 (09:36 -0300)]
m5602_po1030: move skeletons to the .c file

The header file has some private static structures that
are used only by the C file. Move those structures to the C file,
in order to shut up gcc 6.1 warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agom5602_s5k83a: move skeletons to the .c file
Mauro Carvalho Chehab [Fri, 24 Jun 2016 12:34:20 +0000 (09:34 -0300)]
m5602_s5k83a: move skeletons to the .c file

The header file has some private static structures that
are used only by the C file. Move those structures to the C file,
in order to shut up gcc 6.1 warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agom5602_ov9650: move skeletons to the .c file
Mauro Carvalho Chehab [Fri, 24 Jun 2016 12:32:56 +0000 (09:32 -0300)]
m5602_ov9650: move skeletons to the .c file

The header file has some private static structures that
are used only by the C file. Move those structures to the C file,
in order to shut up gcc 6.1 warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agom5602_mt9m111: move skeletons to the .c file
Mauro Carvalho Chehab [Fri, 24 Jun 2016 12:30:36 +0000 (09:30 -0300)]
m5602_mt9m111: move skeletons to the .c file

The header file has some private static structures that
are used only by the C file. Move those structures to the C file,
in order to shut up gcc 6.1 warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agom5602_s5k4aa: move skeletons to the .c file
Mauro Carvalho Chehab [Fri, 24 Jun 2016 12:08:39 +0000 (09:08 -0300)]
m5602_s5k4aa: move skeletons to the .c file

The mc5602_s5k4aa.h has some private static structures that
are used only by the C file. Move those structures to the C file,
in order to shut up gcc 6.1 warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agom5602_core: move skeletons to the .c file
Mauro Carvalho Chehab [Fri, 24 Jun 2016 12:03:17 +0000 (09:03 -0300)]
m5602_core: move skeletons to the .c file

The mc5602_brigde.h is included at m5602 submodules. This
causes Gcc 6.1 to complain:

drivers/media/usb/gspca/m5602/m5602_bridge.h:124:28: warning: 'sensor_urb_skeleton' defined but not used [-Wunused-const-variable=]
 static const unsigned char sensor_urb_skeleton[] = {
                            ^~~~~~~~~~~~~~~~~~~
drivers/media/usb/gspca/m5602/m5602_bridge.h:119:28: warning: 'bridge_urb_skeleton' defined but not used [-Wunused-const-variable=]
 static const unsigned char bridge_urb_skeleton[] = {
                           ^~~~~~~~~~~~~~~~~~~

Let's shut up gcc 6.1 warnings by moving those data structures
to the core, as they're used only there.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agocx18: use macros instead of static const vars
Mauro Carvalho Chehab [Fri, 24 Jun 2016 11:40:51 +0000 (08:40 -0300)]
cx18: use macros instead of static const vars

Gcc 6.1 now complains about unused vars:

drivers/media/pci/cx18/cx18-driver.h:497:18: warning: 'vbi_hblank_samples_50Hz' defined but not used [-Wunused-const-variable=]
 static const u32 vbi_hblank_samples_50Hz = 284; /* 4 byte EAV + 280 anc/fill */
                  ^~~~~~~~~~~~~~~~~~~~~~~
drivers/media/pci/cx18/cx18-driver.h:496:18: warning: 'vbi_hblank_samples_60Hz' defined but not used [-Wunused-const-variable=]
 static const u32 vbi_hblank_samples_60Hz = 272; /* 4 byte EAV + 268 anc/fill */
                  ^~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/media/pci/cx18/cx18-cards.c:25:0:
drivers/media/pci/cx18/cx18-driver.h:497:18: warning: 'vbi_hblank_samples_50Hz' defined but not used [-Wunused-const-variable=]
 static const u32 vbi_hblank_samples_50Hz = 284; /* 4 byte EAV + 280 anc/fill */
                  ^~~~~~~~~~~~~~~~~~~~~~~
drivers/media/pci/cx18/cx18-driver.h:496:18: warning: 'vbi_hblank_samples_60Hz' defined but not used [-Wunused-const-variable=]
 static const u32 vbi_hblank_samples_60Hz = 272; /* 4 byte EAV + 268 anc/fill */
                  ^~~~~~~~~~~~~~~~~~~~~~~
drivers/media/pci/cx18/cx18-driver.h:495:18: warning: 'vbi_active_samples' defined but not used [-Wunused-const-variable=]
 static const u32 vbi_active_samples = 1444; /* 4 byte SAV + 720 Y + 720 U/V */
                  ^~~~~~~~~~~~~~~~~~

In this specific case, this is somewhat intentional, as those
values are actually used in parts of the driver. The code assumes
that gcc optimizer it and not actually create any var, but convert
it to immediate access at the routines.

Yet, as we want to shut up gcc warnings, let's use #define, with
is the standard way to store values that will use assembler's
immediate access code.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agoexynos4-is: remove some unused vars
Mauro Carvalho Chehab [Fri, 24 Jun 2016 11:32:07 +0000 (08:32 -0300)]
exynos4-is: remove some unused vars

Gcc 6.1 warns about some unused vars and functions. Remove them:

drivers/media/platform/exynos4-is/mipi-csis.c:665:46: warning: 's5pcsis_sd_internal_ops' defined but not used [-Wunused-const-variable=]
 static const struct v4l2_subdev_internal_ops s5pcsis_sd_internal_ops = {
                                              ^~~~~~~~~~~~~~~~~~~~~~~

drivers/media/platform/exynos4-is/mipi-csis.c:652:12: warning: 's5pcsis_open' defined but not used [-Wunused-function]
 static int s5pcsis_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
            ^~~~~~~~~~~~

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agousbvision: remove some unused vars
Mauro Carvalho Chehab [Fri, 24 Jun 2016 11:30:15 +0000 (08:30 -0300)]
usbvision: remove some unused vars

Gcc 6.1 warns about some unused vars. Remove them:

drivers/media/usb/usbvision/usbvision-core.c:94:18: warning: 'min_imgheight' defined but not used [-Wunused-const-variable=]
 static const int min_imgheight = MIN_FRAME_HEIGHT;
                  ^~~~~~~~~~~~~
drivers/media/usb/usbvision/usbvision-core.c:93:18: warning: 'min_imgwidth' defined but not used [-Wunused-const-variable=]
 static const int min_imgwidth = MIN_FRAME_WIDTH;
                  ^~~~~~~~~~~~
drivers/media/usb/usbvision/usbvision-core.c:92:18: warning: 'max_imgheight' defined but not used [-Wunused-const-variable=]
 static const int max_imgheight = MAX_FRAME_HEIGHT;
                  ^~~~~~~~~~~~~
drivers/media/usb/usbvision/usbvision-core.c:91:18: warning: 'max_imgwidth' defined but not used [-Wunused-const-variable=]
 static const int max_imgwidth = MAX_FRAME_WIDTH;
                  ^~~~~~~~~~~~

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] media-devnode.h: Fix documentation
Mauro Carvalho Chehab [Thu, 16 Jun 2016 11:04:40 +0000 (08:04 -0300)]
[media] media-devnode.h: Fix documentation

Two parameters were documented with a wrong name, and a struct
device pointer description was missing.

That caused the following warnings, when building documentation:

include/media/media-devnode.h:102: warning: No description found for parameter 'media_dev'
include/media/media-devnode.h:126: warning: No description found for parameter 'mdev'
include/media/media-devnode.h:126: warning: Excess function parameter 'media_dev' description in 'media_devnode_register'

Rename the description, to match the function parameter and fix
Documentation.

No funcional changes.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] rcar-vin: get rid of an unused var
Mauro Carvalho Chehab [Thu, 16 Jun 2016 10:44:42 +0000 (07:44 -0300)]
[media] rcar-vin: get rid of an unused var

drivers/media/platform/rcar-vin/rcar-core.c: In function 'rvin_graph_notify_complete':
drivers/media/platform/rcar-vin/rcar-core.c:65:22: warning: variable 'sd' set but not used [-Wunused-but-set-variable]
  struct v4l2_subdev *sd;
                      ^

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] rcar-vin: add Renesas R-Car VIN driver
Niklas Söderlund [Tue, 26 Apr 2016 13:22:19 +0000 (10:22 -0300)]
[media] rcar-vin: add Renesas R-Car VIN driver

A V4L2 driver for Renesas R-Car VIN driver that do not depend on
soc_camera. The driver is heavily based on its predecessor and aims to
replace it.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] videobuf2-v4l2: Verify planes array in buffer dequeueing
Sakari Ailus [Sun, 3 Apr 2016 19:31:03 +0000 (16:31 -0300)]
[media] videobuf2-v4l2: Verify planes array in buffer dequeueing

When a buffer is being dequeued using VIDIOC_DQBUF IOCTL, the exact buffer
which will be dequeued is not known until the buffer has been removed from
the queue. The number of planes is specific to a buffer, not to the queue.

This does lead to the situation where multi-plane buffers may be requested
and queued with n planes, but VIDIOC_DQBUF IOCTL may be passed an argument
struct with fewer planes.

__fill_v4l2_buffer() however uses the number of planes from the dequeued
videobuf2 buffer, overwriting kernel memory (the m.planes array allocated
in video_usercopy() in v4l2-ioctl.c)  if the user provided fewer
planes than the dequeued buffer had. Oops!

Fixes: b0e0e1f83de3 ("[media] media: videobuf2: Prepare to divide videobuf2")

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: stable@vger.kernel.org # for v4.4 and later
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] vb2: core: Skip planes array verification if pb is NULL
Sakari Ailus [Wed, 11 May 2016 21:44:32 +0000 (18:44 -0300)]
[media] vb2: core: Skip planes array verification if pb is NULL

An earlier patch fixing an input validation issue introduced another
issue: vb2_core_dqbuf() is called with pb argument value NULL in some
cases, causing a NULL pointer dereference. Fix this by skipping the
verification as there's nothing to verify.

Fixes: e7e0c3e26587 ("[media] videobuf2-core: Check user space planes array in dqbuf")

Signed-off-by: David R <david@unsolicited.net>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: stable@vger.kernel.org # for v4.4 and later
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] media: fix media devnode ioctl/syscall and unregister race
Shuah Khan [Fri, 10 Jun 2016 17:37:23 +0000 (14:37 -0300)]
[media] media: fix media devnode ioctl/syscall and unregister race

Media devnode open/ioctl could be in progress when media device unregister
is initiated. System calls and ioctls check media device registered status
at the beginning, however, there is a window where unregister could be in
progress without changing the media devnode status to unregistered.

process 1 process 2
fd = open(/dev/media0)
media_devnode_is_registered()
(returns true here)

media_device_unregister()
(unregister is in progress
and devnode isn't
unregistered yet)
...
ioctl(fd, ...)
__media_ioctl()
media_devnode_is_registered()
(returns true here)
...
media_devnode_unregister()
...
(driver releases the media device
memory)

media_device_ioctl()
(By this point
devnode->media_dev does not
point to allocated memory.
use-after free in in mutex_lock_nested)

BUG: KASAN: use-after-free in mutex_lock_nested+0x79c/0x800 at addr
ffff8801ebe914f0

Fix it by clearing register bit when unregister starts to avoid the race.

process 1                               process 2
fd = open(/dev/media0)
media_devnode_is_registered()
        (could return true here)

                                        media_device_unregister()
                                                (clear the register bit,
 then start unregister.)
                                        ...
ioctl(fd, ...)
__media_ioctl()
media_devnode_is_registered()
        (return false here, ioctl
 returns I/O error, and
 will not access media
 device memory)
                                        ...
                                        media_devnode_unregister()
                                        ...
                                        (driver releases the media device
 memory)

Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Suggested-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reported-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Tested-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] media: fix use-after-free in cdev_put() when app exits after driver unbind
Shuah Khan [Wed, 4 May 2016 19:48:28 +0000 (16:48 -0300)]
[media] media: fix use-after-free in cdev_put() when app exits after driver unbind

When driver unbinds while media_ioctl is in progress, cdev_put() fails with
when app exits after driver unbinds.

Add devnode struct device kobj as the cdev parent kobject. cdev_add() gets
a reference to it and releases it in cdev_del() ensuring that the devnode
is not deallocated as long as the application has the device file open.

media_devnode_register() initializes the struct device kobj before calling
cdev_add(). media_devnode_unregister() does cdev_del() and then deletes the
device. devnode is released when the last reference to the struct device is
gone.

This problem is found on uvcvideo, em28xx, and au0828 drivers and fix has
been tested on all three.

kernel: [  193.599736] BUG: KASAN: use-after-free in cdev_put+0x4e/0x50
kernel: [  193.599745] Read of size 8 by task media_device_te/1851
kernel: [  193.599792] INFO: Allocated in __media_device_register+0x54
kernel: [  193.599951] INFO: Freed in media_devnode_release+0xa4/0xc0

kernel: [  193.601083] Call Trace:
kernel: [  193.601093]  [<ffffffff81aecac3>] dump_stack+0x67/0x94
kernel: [  193.601102]  [<ffffffff815359b2>] print_trailer+0x112/0x1a0
kernel: [  193.601111]  [<ffffffff8153b5e4>] object_err+0x34/0x40
kernel: [  193.601119]  [<ffffffff8153d9d4>] kasan_report_error+0x224/0x530
kernel: [  193.601128]  [<ffffffff814a2c3d>] ? kzfree+0x2d/0x40
kernel: [  193.601137]  [<ffffffff81539d72>] ? kfree+0x1d2/0x1f0
kernel: [  193.601154]  [<ffffffff8157ca7e>] ? cdev_put+0x4e/0x50
kernel: [  193.601162]  [<ffffffff8157ca7e>] cdev_put+0x4e/0x50
kernel: [  193.601170]  [<ffffffff815767eb>] __fput+0x52b/0x6c0
kernel: [  193.601179]  [<ffffffff8117743a>] ? switch_task_namespaces+0x2a
kernel: [  193.601188]  [<ffffffff815769ee>] ____fput+0xe/0x10
kernel: [  193.601196]  [<ffffffff81170023>] task_work_run+0x133/0x1f0
kernel: [  193.601204]  [<ffffffff8117746e>] ? switch_task_namespaces+0x5e
kernel: [  193.601213]  [<ffffffff8111b50c>] do_exit+0x72c/0x2c20
kernel: [  193.601224]  [<ffffffff8111ade0>] ? release_task+0x1250/0x1250
-
-
-
kernel: [  193.601360]  [<ffffffff81003587>] ? exit_to_usermode_loop+0xe7
kernel: [  193.601368]  [<ffffffff810035c0>] exit_to_usermode_loop+0x120
kernel: [  193.601376]  [<ffffffff810061da>] syscall_return_slowpath+0x16a
kernel: [  193.601386]  [<ffffffff82848b33>] entry_SYSCALL_64_fastpath+0xa6

Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Tested-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] media-device: dynamically allocate struct media_devnode
Mauro Carvalho Chehab [Wed, 27 Apr 2016 22:28:26 +0000 (19:28 -0300)]
[media] media-device: dynamically allocate struct media_devnode

struct media_devnode is currently embedded at struct media_device.

While this works fine during normal usage, it leads to a race
condition during devnode unregister. the problem is that drivers
assume that, after calling media_device_unregister(), the struct
that contains media_device can be freed. This is not true, as it
can't be freed until userspace closes all opened /dev/media devnodes.

In other words, if the media devnode is still open, and media_device
gets freed, any call to an ioctl will make the core to try to access
struct media_device, with will cause an use-after-free and even GPF.

Fix this by dynamically allocating the struct media_devnode and only
freeing it when it is safe.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] media-devnode: fix namespace mess
Mauro Carvalho Chehab [Wed, 23 Mar 2016 14:22:57 +0000 (11:22 -0300)]
[media] media-devnode: fix namespace mess

Along all media controller code, "mdev" is used to represent
a pointer to struct media_device, and "devnode" for a pointer
to struct media_devnode.

However, inside media-devnode.[ch], "mdev" is used to represent
a pointer to struct media_devnode.

This is very confusing and may lead to development errors.

So, let's change all occurrences at media-devnode.[ch] to
also use "devnode" for such pointers.

This patch doesn't make any functional changes.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years agoUpdate my main e-mails at the Kernel tree
Mauro Carvalho Chehab [Tue, 14 Jun 2016 17:48:50 +0000 (14:48 -0300)]
Update my main e-mails at the Kernel tree

For the third time in three years, I'm changing my e-mail at
Samsung. That's bad, as it may stop communications with me for
a while. So, this time, I'll also the mchehab@kernel.org e-mail,
as it remains stable since ever.

Cc: stable@vger.kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
8 years ago[media] m88rs2000: initialize status to zero
Colin Ian King [Tue, 10 May 2016 05:40:22 +0000 (02:40 -0300)]
[media] m88rs2000: initialize status to zero

status is not initialized so it can contain garbage. The
check for status containing the FE_HAS_LOCK bit may randomly pass
or fail if the read of register 0x8c fails to set status after 25
read attempts.  Fix this by initializing status to 0.

Issue found with CoverityScan, CID#986738

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] em28xx-i2c: rt_mutex_trylock() returns zero on failure
Dan Carpenter [Mon, 9 May 2016 08:22:55 +0000 (05:22 -0300)]
[media] em28xx-i2c: rt_mutex_trylock() returns zero on failure

The code is checking for negative returns but it should be checking for
zero.

Fixes: aab3125c43d8 ('[media] em28xx: add support for registering multiple i2c buses')

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] mt2063: use lib gcd
Zhaoxiu Zeng [Wed, 27 Apr 2016 07:07:08 +0000 (04:07 -0300)]
[media] mt2063: use lib gcd

This patch removes the local MT2063_gcd function, uses lib gcd instead

Signed-off-by: Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] rtl2832: add support for slave ts pid filter
Martin Blumenstingl [Tue, 7 Jun 2016 21:31:47 +0000 (18:31 -0300)]
[media] rtl2832: add support for slave ts pid filter

The rtl2832 demod has 2 sets of PID filters. This patch enables
the filter support when using a slave demod.

Signed-off-by: Benjamin Larsson <benjamin@southpole.se>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] af9035: fix logging
Antti Palosaari [Wed, 1 Jun 2016 11:25:05 +0000 (08:25 -0300)]
[media] af9035: fix logging

Remove __func__ and KBUILD_MODNAME from logging formatters and pass
USB interface device instead, so logging can be done correctly.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] af9035: fix for MXL5007T devices with I2C read issues
Alessandro Radicati [Thu, 12 May 2016 10:47:12 +0000 (07:47 -0300)]
[media] af9035: fix for MXL5007T devices with I2C read issues

The MXL5007T tuner will lock-up on some devices after an I2C read
transaction.  This patch works around this issue by inhibiting such
operations and emulating a 0x00 response. The workaround is only
applied to USB devices known to exhibit this flaw.

Signed-off-by: Alessandro Radicati <alessandro@radicati.net>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] af9035: I2C combined write + read transaction fix
Alessandro Radicati [Tue, 5 Apr 2016 22:23:43 +0000 (19:23 -0300)]
[media] af9035: I2C combined write + read transaction fix

This patch will modify the af9035 driver to use the register address
fields of the I2C read command for the combined write/read transaction
case.  Without this change, the firmware issues just a I2C read
transaction without the preceding write transaction to select the
register.

Signed-off-by: Alessandro Radicati <alessandro@radicati.net>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] of: reserved_mem: restore old behavior when no region is defined
Marek Szyprowski [Wed, 8 Jun 2016 06:51:53 +0000 (03:51 -0300)]
[media] of: reserved_mem: restore old behavior when no region is defined

Change return value back to -ENODEV when no region is defined for given
device. This restores old behavior of this function, as some drivers rely
on such error code.

Fixes: 59ce4039727ef40 ("of: reserved_mem: add support for using more than
       one region for given device")

Reported-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Liviu Dudau <Liviu.Dudau@arm.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Sumit Semwal <sumit.semwal@linaro.org>
8 years ago[media] drivers/media/dvb-core/en50221: move code to dvb_ca_private_free()
Max Kellermann [Mon, 21 Mar 2016 13:30:17 +0000 (10:30 -0300)]
[media] drivers/media/dvb-core/en50221: move code to dvb_ca_private_free()

Prepare for postponing the call until all file handles have been
closed.

[mchehab@osg.samsung.com: make checkpatch happy]
Signed-off-by: Max Kellermann <max@duempel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] ds3000: return error if invalid symbol rate is set
Olli Salonen [Wed, 16 Mar 2016 11:04:51 +0000 (08:04 -0300)]
[media] ds3000: return error if invalid symbol rate is set

Return -EINVAL if ds3000_set_frontend is called with invalid parameters.

v1 of the patch series got incorrect subject lines.

Signed-off-by: Olli Salonen <olli.salonen@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] fix semicolon.cocci warnings
Fengguang Wu [Tue, 7 Jun 2016 15:26:01 +0000 (12:26 -0300)]
[media] fix semicolon.cocci warnings

drivers/media/dvb-frontends/helene.c:750:2-3: Unneeded semicolon

 Remove unneeded semicolon.

Generated by: scripts/coccinelle/misc/semicolon.cocci

CC: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] rtl28xxu: sort the config symbols which are auto-selected
Martin Blumenstingl [Sun, 22 May 2016 16:12:07 +0000 (13:12 -0300)]
[media] rtl28xxu: sort the config symbols which are auto-selected

No functional changes.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] rtl28xxu: auto-select more DVB-frontends and tuners
Martin Blumenstingl [Sun, 22 May 2016 16:12:06 +0000 (13:12 -0300)]
[media] rtl28xxu: auto-select more DVB-frontends and tuners

This adds the missing auto-select bits for DVB-frontends and tuners
(if MEDIA_SUBDRV_AUTOSELECT is enabled) which are used by the various
rtl28xxu devices.
The driver itself probes for three more tuners, but it's not actually
using any of them:
- MEDIA_TUNER_MT2063
- MEDIA_TUNER_MT2266
- MEDIA_TUNER_MXL5007T

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] mn88472: move out of staging to media
Antti Palosaari [Sat, 14 May 2016 05:08:15 +0000 (08:08 +0300)]
[media] mn88472: move out of staging to media

Move mn88472 DVB-T/T2/C demod driver out of staging to media.

v2: Fix build error reported by kbuild test robot:
drivers/staging/media/mn88472/Makefile: No such file or directory

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] mn88472: finalize driver
Antti Palosaari [Fri, 13 May 2016 15:19:19 +0000 (12:19 -0300)]
[media] mn88472: finalize driver

Finalize driver in order to move out of staging.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] mn88472: fix typo
Julia Lawall [Tue, 17 May 2016 14:38:42 +0000 (11:38 -0300)]
[media] mn88472: fix typo

firmare -> firmware

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] rtl28xxu: increase failed I2C msg repeat count to 3
Antti Palosaari [Fri, 13 May 2016 15:08:45 +0000 (12:08 -0300)]
[media] rtl28xxu: increase failed I2C msg repeat count to 3

1 and 2 wasn't enough for mn88472 chip on Astrometa device,
so increase it to 3.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] mn88473: fix typo
Julia Lawall [Tue, 17 May 2016 14:38:41 +0000 (11:38 -0300)]
[media] mn88473: fix typo

firmare -> firmware

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] mn88473: fix error path on probe()
Antti Palosaari [Sat, 14 May 2016 05:29:21 +0000 (02:29 -0300)]
[media] mn88473: fix error path on probe()

Latest, 3rd, regmap instance should be freed on error case.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] staging/media: remove deprecated timb driver
Hans Verkuil [Thu, 2 Jun 2016 07:10:58 +0000 (04:10 -0300)]
[media] staging/media: remove deprecated timb driver

Remove this deprecated old driver.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Richard Röjfors <richard@puffinpack.se>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] staging/media: remove deprecated omap1 driver
Hans Verkuil [Thu, 2 Jun 2016 07:09:32 +0000 (04:09 -0300)]
[media] staging/media: remove deprecated omap1 driver

Remove this deprecated old driver.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] staging/media: remove deprecated mx3 driver
Hans Verkuil [Thu, 2 Jun 2016 07:07:49 +0000 (04:07 -0300)]
[media] staging/media: remove deprecated mx3 driver

Remove this deprecated old driver.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] staging/media: remove deprecated mx2 driver
Hans Verkuil [Thu, 2 Jun 2016 07:03:47 +0000 (04:03 -0300)]
[media] staging/media: remove deprecated mx2 driver

Remove this deprecated old driver.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] s5p-mfc: fix a typo in s5p_mfc_dec
ayaka [Sat, 7 May 2016 05:05:26 +0000 (02:05 -0300)]
[media] s5p-mfc: fix a typo in s5p_mfc_dec

It is a cosmetic commit.

Signed-off-by: ayaka <ayaka@soulik.info>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] s5p-mfc: remove unnecessary check in try_fmt
ayaka [Sat, 7 May 2016 05:05:25 +0000 (02:05 -0300)]
[media] s5p-mfc: remove unnecessary check in try_fmt

We don't need to request the sizeimage or num_planes
in try_fmt.

Signed-off-by: ayaka <ayaka@soulik.info>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] s5p-mfc: Add handling of buffer freeing reqbufs request
ayaka [Sat, 7 May 2016 05:05:24 +0000 (02:05 -0300)]
[media] s5p-mfc: Add handling of buffer freeing reqbufs request

The encoder forget the work to call hardware to release its buffers.
This patch came from chromium project. I just change its code
style and make the API match with new kernel.

Signed-off-by: ayaka <ayaka@soulik.info>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years agoMAINTAINERS: Add Sony Helene TV tuner entry
Abylay Ospan [Tue, 7 Jun 2016 15:33:57 +0000 (11:33 -0400)]
MAINTAINERS: Add Sony Helene TV tuner entry

I'm maintainer for Sony Helene tuner (drivers/media/dvb-frontends/helene.*)

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] helene: fix a warning when printing sizeof()
Mauro Carvalho Chehab [Tue, 7 Jun 2016 15:18:40 +0000 (12:18 -0300)]
[media] helene: fix a warning when printing sizeof()

drivers/media/dvb-frontends/helene.c: In function 'helene_write_regs':
drivers/media/dvb-frontends/helene.c:312:5: warning: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'unsigned int' [-Wformat=]
     "wr reg=%04x: len=%d vs %lu is too big!\n",
     ^

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] fix typo in SONY demodulator description
Abylay Ospan [Mon, 16 May 2016 14:57:04 +0000 (11:57 -0300)]
[media] fix typo in SONY demodulator description

correct is CXD2841ER and CXD2854ER
incorrect was CXD2441ER and CXD2454ER

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] Change frontend allocation strategy for NetUP Universal DVB cards
Abylay Ospan [Sat, 14 May 2016 03:08:40 +0000 (00:08 -0300)]
[media] Change frontend allocation strategy for NetUP Universal DVB cards

Old behaviour:
frontend0 - DVB-S/S2
frontend1 - DVB-T/T2
frontend2 - DVB-C
frontend3 - ISDB-T

New behaviour (DVBv5 API compliant):
frontend0 - DVB-S/S2
frontend1 - DVB-T/T2/C/ISDB-T

DTV standard should be selected by DTV_DELIVERY_SYSTEM call.

And DVB-C default bandwidth now 8MHz

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] support DVB-T2 for SONY CXD2841/54
Abylay Ospan [Mon, 16 May 2016 14:43:25 +0000 (11:43 -0300)]
[media] support DVB-T2 for SONY CXD2841/54

bandwidth 1.7,5,6,7,8Mhz support for DVB-T2

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] fix DVB-S/S2 tuning
Abylay Ospan [Thu, 12 May 2016 03:02:04 +0000 (00:02 -0300)]
[media] fix DVB-S/S2 tuning

Fixed HELENE tuner frequency calculation

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] ISDB-T retune and offset fix and DVB-C bw fix
Mauro Carvalho Chehab [Wed, 4 May 2016 21:25:38 +0000 (18:25 -0300)]
[media] ISDB-T retune and offset fix and DVB-C bw fix

now when new tuning parameters specified demod should retune.
Also ISDB-T frequency offset calculation added
(cxd2841er_get_carrier_offset_i).

While here, fix re-tune for DVB-C Annex A, using the desired
bandwidth, instead of using 8MHz.

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] Fix DVB-T frequency offset calculation
Abylay Ospan [Wed, 20 Apr 2016 17:02:58 +0000 (14:02 -0300)]
[media] Fix DVB-T frequency offset calculation

Fix offset calculation inside cxd2841er_get_carrier_offset_t
Now DVB-T should be tuned correctly

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] Sanity check when initializing DVB-S/S2 demodulator
Abylay Ospan [Tue, 5 Apr 2016 18:02:37 +0000 (15:02 -0300)]
[media] Sanity check when initializing DVB-S/S2 demodulator

Avoid error message:
cxd2841er_read_status_s(): invalid state 1
Always force demod to shutdown state before initializing

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] Add carrier offset calculation for DVB-T
Abylay Ospan [Sun, 3 Apr 2016 02:31:50 +0000 (23:31 -0300)]
[media] Add carrier offset calculation for DVB-T

Adding cxd2841er_get_carrier_offset_t to calculate DVB-T offset
for Sony demodulators CXD2841ER and CXD2854ER

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] MAINTAINERS: Add a maintainer for netup_unidvb, cxd2841er, horus3a, ascot2e
Abylay Ospan [Sat, 2 Apr 2016 03:00:58 +0000 (00:00 -0300)]
[media] MAINTAINERS: Add a maintainer for netup_unidvb, cxd2841er, horus3a, ascot2e

I'm second maintainer for netup_unidvb, cxd2841er, horus3a, ascot2e

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] Fix CAM module memory read/write
Abylay Ospan [Fri, 1 Apr 2016 21:00:53 +0000 (18:00 -0300)]
[media] Fix CAM module memory read/write

mistakenly membase8_io used instead of membase8_config
in this case we can't read/write CAM module memory (TUPLES)

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] New hw revision 1.4 of NetUP Universal DVB card added
Abylay Ospan [Thu, 24 Mar 2016 01:34:07 +0000 (22:34 -0300)]
[media] New hw revision 1.4 of NetUP Universal DVB card added

New hardware revision of NetUP Universal DVB card (rev 1.4):
* changed tuners (CXD2861ER and CXD2832AER) to CXD2858ER
* changed demodulator (CXD2841ER) to CXD2854ER

card now supports:
DVB-S/S2, DVB-T/T2, DVB-C/C2, ISDB-T

PCI id's assigned for new hardware revision is:
1b55:18f7

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] Fix DVB-S/S2 tune for sony ascot3a tuner
Abylay Ospan [Thu, 24 Mar 2016 01:31:55 +0000 (22:31 -0300)]
[media] Fix DVB-S/S2 tune for sony ascot3a tuner

* fix buffer length check
* do not rely on ROLLOFF

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] Add support Sony CXD2854ER demodulator
Abylay Ospan [Tue, 22 Mar 2016 22:20:34 +0000 (19:20 -0300)]
[media] Add support Sony CXD2854ER demodulator

CXD2854ER is identical to CXD2841ER except ISDB-T/S added.
New method 'cxd2841er_attach_i' is added
xtal frequency now configurable. Available options:
20.5MHz, 24MHz, 41MHz

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] Add support Sony HELENE Sat/Ter Tuner
Abylay Ospan [Tue, 22 Mar 2016 01:19:12 +0000 (22:19 -0300)]
[media] Add support Sony HELENE Sat/Ter Tuner

This is Sony HELENE DVB-S/S2 DVB-T/T2 DVB-C/C2 ISDB-T/S tuner
driver (CXD2858ER).

Tuner is used on NetUP Dual Universal DVB CI card (hardware revision 1.4).
Use 'helene_attach_s' to attach tuner in 'satellite mode'.
Use 'helene_attach' for 'terrestrial mode'.

Satellite delivery systems supported:
 DVB-S/S2, ISDB-S

Terrestrial delivery systems supported:
 DVB-T/T2, ISDB-T

Cable delivery systems supported:
 DVB-C/C2

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] uvcvideo: Correct speed testing
Oliver Neukum [Mon, 2 May 2016 11:23:21 +0000 (08:23 -0300)]
[media] uvcvideo: Correct speed testing

Allow for SS+ USB devices.

Signed-off-by: Oliver Neukum <ONeukum@suse.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] uvcvideo: Fix bytesperline calculation for planar YUV
Nicolas Dufresne [Thu, 7 Jan 2016 20:43:48 +0000 (18:43 -0200)]
[media] uvcvideo: Fix bytesperline calculation for planar YUV

The formula used to calculate bytesperline only works for packed format.
So far, all planar format we support have their bytesperline equal to
the image width (stride of the Y plane or a line of Y for M420).

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] dt-bindings: Add a binding for Mediatek Video Processor
Andrew-CT Chen [Tue, 3 May 2016 10:11:20 +0000 (07:11 -0300)]
[media] dt-bindings: Add a binding for Mediatek Video Processor

Add a DT binding documentation of Video Processor Unit for the
MT8173 SoC from Mediatek.

Signed-off-by: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
Signed-off-by: Tiffany Lin <tiffany.lin@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] s5p-mfc: don't close instance after free OUTPUT buffers
ayaka [Fri, 6 May 2016 22:11:22 +0000 (19:11 -0300)]
[media] s5p-mfc: don't close instance after free OUTPUT buffers

User-space applications can use the VIDIOC_REQBUFS ioctl to determine if a
memory mapped, user pointer or DMABUF based I/O is supported by the driver.

So a set of VIDIOC_REQBUFS ioctl calls will be made with count 0 and then
the real VIDIOC_REQBUFS call with count == n. But for count 0, the driver
not only frees the buffer but also closes the MFC instance and s5p_mfc_ctx
state is set to MFCINST_FREE.

The VIDIOC_REQBUFS handler for the output device checks if the s5p_mfc_ctx
state is set to MFCINST_INIT (which happens on an VIDIOC_S_FMT) and fails
otherwise. So after a VIDIOC_REQBUFS(n), future VIDIOC_REQBUFS(n) calls
will fails unless a VIDIOC_S_FMT ioctl calls happens before the reqbufs.

But applications may first set the format and then attempt to determine
the I/O methods supported by the driver (for example Gstramer does it) so
the state won't be set to MFCINST_INIT again and VIDIOC_REQBUFS will fail.

To avoid this issue, only free the buffers on VIDIOC_REQBUFS(0) but don't
close the MFC instance to allow future VIDIOC_REQBUFS(n) calls to succeed.

[javier: Rewrote changelog to explain the problem more detailed]

Signed-off-by: ayaka <ayaka@soulik.info>
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Nicolas Dufresne <nicolas@collabora.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] s5p-mfc: Don't try to put pm->clock if lookup failed
Javier Martinez Canillas [Mon, 2 May 2016 19:14:22 +0000 (16:14 -0300)]
[media] s5p-mfc: Don't try to put pm->clock if lookup failed

Failing to get the struct s5p_mfc_pm .clock is a non-fatal error so the
clock field can have a errno pointer value. But s5p_mfc_final_pm() only
checks if .clock is not NULL before attempting to unprepare and put it.

This leads to the following warning in clk_put() due s5p_mfc_final_pm():

WARNING: CPU: 3 PID: 1023 at drivers/clk/clk.c:2814 s5p_mfc_final_pm+0x48/0x74 [s5p_mfc]
CPU: 3 PID: 1023 Comm: rmmod Tainted: G        W       4.6.0-rc6-next-20160502-00005-g5a15a49106bc #9
Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
[<c010e1bc>] (unwind_backtrace) from [<c010af28>] (show_stack+0x10/0x14)
[<c010af28>] (show_stack) from [<c032485c>] (dump_stack+0x88/0x9c)
[<c032485c>] (dump_stack) from [<c011b8e8>] (__warn+0xe8/0x100)
[<c011b8e8>] (__warn) from [<c011b9b0>] (warn_slowpath_null+0x20/0x28)
[<c011b9b0>] (warn_slowpath_null) from [<bf16004c>] (s5p_mfc_final_pm+0x48/0x74 [s5p_mfc])
[<bf16004c>] (s5p_mfc_final_pm [s5p_mfc]) from [<bf157414>] (s5p_mfc_remove+0x8c/0x94 [s5p_mfc])
[<bf157414>] (s5p_mfc_remove [s5p_mfc]) from [<c03fe1f8>] (platform_drv_remove+0x24/0x3c)
[<c03fe1f8>] (platform_drv_remove) from [<c03fcc70>] (__device_release_driver+0x84/0x110)
[<c03fcc70>] (__device_release_driver) from [<c03fcdd8>] (driver_detach+0xac/0xb0)
[<c03fcdd8>] (driver_detach) from [<c03fbff8>] (bus_remove_driver+0x4c/0xa0)
[<c03fbff8>] (bus_remove_driver) from [<c01886a8>] (SyS_delete_module+0x174/0x1b8)
[<c01886a8>] (SyS_delete_module) from [<c01078c0>] (ret_fast_syscall+0x0/0x3c)

Assign the pointer to NULL in case of a lookup failure to fix the issue.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
8 years ago[media] media: s5p-mfc: fix compilation issue on archs other than ARM (32bit)
Marek Szyprowski [Tue, 7 Jun 2016 11:32:16 +0000 (08:32 -0300)]
[media] media: s5p-mfc: fix compilation issue on archs other than ARM (32bit)

This patch fixes build break caused by lack of dma-iommu API on ARM64
(this API is specific to ARM 32bit architecture).

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
8 years agoMerge branch 'for-v4.8/media/exynos-mfc' of git://linuxtv.org/snawrocki/samsung into...
Mauro Carvalho Chehab [Tue, 7 Jun 2016 13:21:12 +0000 (10:21 -0300)]
Merge branch 'for-v4.8/media/exynos-mfc' of git://linuxtv.org/snawrocki/samsung into patchwork

* 'for-v4.8/media/exynos-mfc' of git://linuxtv.org/snawrocki/samsung:
  media: s5p-mfc: add iommu support
  media: s5p-mfc: replace custom reserved memory handling code with generic one
  media: s5p-mfc: use generic reserved memory bindings
  of: reserved_mem: add support for using more than one region for given device
  media: set proper max seg size for devices on Exynos SoCs
  media: vb2-dma-contig: add helper for setting dma max seg size
  s5p-mfc: Fix race between s5p_mfc_probe() and s5p_mfc_open()
  s5p-mfc: Add release callback for memory region devs
  s5p-mfc: Set device name for reserved memory region devs

8 years agomedia: s5p-mfc: add iommu support
Marek Szyprowski [Tue, 24 May 2016 13:31:27 +0000 (15:31 +0200)]
media: s5p-mfc: add iommu support

This patch adds support for IOMMU to s5p-mfc device driver. MFC firmware
is limited and it cannot use the default configuration. If IOMMU is
available, the patch disables the default DMA address space
configuration and creates a new address space of size limited to 256M
and base address set to 0x20000000.

For now the same address space is shared by both 'left' and 'right'
memory channels, because the DMA/IOMMU frameworks do not support
configuring them separately. This is not optimal, but besides limiting
total address space available has no other drawbacks (MFC firmware
supports 256M of address space per each channel).

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
8 years agomedia: s5p-mfc: replace custom reserved memory handling code with generic one
Marek Szyprowski [Tue, 24 May 2016 13:31:26 +0000 (15:31 +0200)]
media: s5p-mfc: replace custom reserved memory handling code with generic one

This patch removes custom code for initialization and handling of
reserved memory regions in s5p-mfc driver and replaces it with generic
reserved memory regions api.

s5p-mfc driver now handles two reserved memory regions defined by
generic reserved memory bindings. Support for non-dt platform has been
removed, because all supported platforms have been already converted to
device tree.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
8 years agomedia: s5p-mfc: use generic reserved memory bindings
Marek Szyprowski [Tue, 24 May 2016 13:31:25 +0000 (15:31 +0200)]
media: s5p-mfc: use generic reserved memory bindings

Use generic reserved memory bindings and mark old, custom properties
as obsoleted.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
8 years agoof: reserved_mem: add support for using more than one region for given device
Marek Szyprowski [Tue, 24 May 2016 13:31:24 +0000 (15:31 +0200)]
of: reserved_mem: add support for using more than one region for given device

This patch allows device drivers to initialize more than one reserved
memory region assigned to given device. When driver needs to use more
than one reserved memory region, it should allocate child devices and
initialize regions by index for each of its child devices.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
8 years agomedia: set proper max seg size for devices on Exynos SoCs
Marek Szyprowski [Tue, 24 May 2016 07:16:07 +0000 (09:16 +0200)]
media: set proper max seg size for devices on Exynos SoCs

All multimedia devices found on Exynos SoCs support only contiguous
buffers, so set DMA max segment size to DMA_BIT_MASK(32) to let memory
allocator to correctly create contiguous memory mappings.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
8 years agomedia: vb2-dma-contig: add helper for setting dma max seg size
Marek Szyprowski [Tue, 24 May 2016 07:16:06 +0000 (09:16 +0200)]
media: vb2-dma-contig: add helper for setting dma max seg size

Add a helper function for device drivers to set DMA's max_seg_size.
Setting it to largest possible value lets DMA-mapping API always create
contiguous mappings in DMA address space. This is essential for all
devices, which use dma-contig videobuf2 memory allocator and shared
buffers.

Till now, the only case when vb2-dma-contig really 'worked' was a case
where userspace provided USERPTR buffer, which was in fact mmaped
contiguous buffer from the other v4l2/drm device. Also DMABUF made of
contiguous buffer worked only when its exporter did not split it into
several chunks in the scatter-list. Any other buffer failed, regardless
of the arch/platform used and the presence of the IOMMU of the device bus.

This patch provides interface to fix this issue.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
8 years agos5p-mfc: Fix race between s5p_mfc_probe() and s5p_mfc_open()
Javier Martinez Canillas [Tue, 3 May 2016 20:27:18 +0000 (16:27 -0400)]
s5p-mfc: Fix race between s5p_mfc_probe() and s5p_mfc_open()

The s5p_mfc_probe() function registers the video devices before all the
resources needed by s5p_mfc_open() are correctly initalized.

So if s5p_mfc_open() function is called before s5p_mfc_probe() finishes
(since the video dev is already registered), a NULL pointer dereference
will happen due s5p_mfc_open() accessing uninitialized vars such as the
struct s5p_mfc_dev .watchdog_timer and .mfc_ops fields.

An example is following BUG caused by add_timer() getting a NULL pointer:

[   45.765374] kernel BUG at kernel/time/timer.c:790!
[   45.765381] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM
...
[   45.766149] [<c016fdf4>] (mod_timer) from [<bf181d18>] (s5p_mfc_open+0x274/0x4d4 [s5p_mfc])
[   45.766416] [<bf181d18>] (s5p_mfc_open [s5p_mfc]) from [<bf0214a0>] (v4l2_open+0x9c/0x100 [videodev])
[   45.766547] [<bf0214a0>] (v4l2_open [videodev]) from [<c01e355c>] (chrdev_open+0x9c/0x178)
[   45.766575] [<c01e355c>] (chrdev_open) from [<c01dceb4>] (do_dentry_open+0x1e0/0x300)
[   45.766595] [<c01dceb4>] (do_dentry_open) from [<c01ec2f0>] (path_openat+0x800/0x10d4)
[   45.766610] [<c01ec2f0>] (path_openat) from [<c01ed8b8>] (do_filp_open+0x5c/0xc0)
[   45.766624] [<c01ed8b8>] (do_filp_open) from [<c01de218>] (do_sys_open+0x10c/0x1bc)
[   45.766642] [<c01de218>] (do_sys_open) from [<c01078c0>] (ret_fast_syscall+0x0/0x3c)
[   45.766655] Code: eaffffe3 e3a00001 e28dd008 e8bd81f0 (e7f001f2)

Fix it by registering the video devs as the last step in s5p_mfc_probe().

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
8 years agos5p-mfc: Add release callback for memory region devs
Javier Martinez Canillas [Tue, 3 May 2016 20:27:17 +0000 (16:27 -0400)]
s5p-mfc: Add release callback for memory region devs

When s5p_mfc_remove() calls put_device() for the reserved memory region
devs, the driver core warns that the dev doesn't have a release callback:

WARNING: CPU: 0 PID: 591 at drivers/base/core.c:251 device_release+0x8c/0x90
Device 's5p-mfc-l' does not have a release() function, it is broken and must be fixed.

Also, the declared DMA memory using dma_declare_coherent_memory() isn't
relased so add a dev .release that calls dma_release_declared_memory().

Cc: <stable@vger.kernel.org>
Fixes: 6e83e6e25eb4 ("[media] s5p-mfc: Fix kernel warning on memory init")
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
8 years agos5p-mfc: Set device name for reserved memory region devs
Javier Martinez Canillas [Tue, 3 May 2016 20:27:16 +0000 (16:27 -0400)]
s5p-mfc: Set device name for reserved memory region devs

The devices don't have a name set, so makes dev_name() returns NULL which
makes harder to identify the devices that are causing issues, for example:

WARNING: CPU: 2 PID: 616 at drivers/base/core.c:251 device_release+0x8c/0x90
Device '(null)' does not have a release() function, it is broken and must be fixed.

And after setting the device name:

WARNING: CPU: 0 PID: 591 at drivers/base/core.c:251 device_release+0x8c/0x90
Device 's5p-mfc-l' does not have a release() function, it is broken and must be fixed.

Cc: <stable@vger.kernel.org>
Fixes: 6e83e6e25eb4 ("[media] s5p-mfc: Fix kernel warning on memory init")
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>