media: v4l: subdev: Switch to stream-aware state functions

Switch all drivers accessing sub-device state to use the stream-aware
functions. We will soon remove the old ones.

This patch has been generated using the following Coccinelle script:

---------8<------------
@@
expression E1, E2, E3;

@@

- v4l2_subdev_get_pad_format(E1, E2, E3)
+ v4l2_subdev_state_get_format(E2, E3)

@@
expression E1, E2, E3;

@@

- v4l2_subdev_get_pad_crop(E1, E2, E3)
+ v4l2_subdev_state_get_crop(E2, E3)

@@
expression E1, E2, E3;

@@

- v4l2_subdev_get_pad_compose(E1, E2, E3)
+ v4l2_subdev_state_get_compose(E2, E3)

@@
expression E1, E2, E3;

@@

- v4l2_subdev_get_try_format(E1, E2, E3)
+ v4l2_subdev_state_get_format(E2, E3)

@@
expression E1, E2, E3;

@@

- v4l2_subdev_get_try_crop(E1, E2, E3)
+ v4l2_subdev_state_get_crop(E2, E3)

@@
expression E1, E2, E3;

@@

- v4l2_subdev_get_try_compose(E1, E2, E3)
+ v4l2_subdev_state_get_compose(E2, E3)
---------8<------------

Additionally drivers/media/i2c/s5k5baf.c and
drivers/media/platform/samsung/s3c-camif/camif-capture.c have been
manually changed as Coccinelle didn't. Further local variables have been
removed as they became unused as a result of the other changes.

Also Coccinelle introduced indentation by space in files
drivers/media/i2c/st-mipid02.c and
drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c. This has been also
corrected.

The diff from Coccinelle-generated changes are:

> diff --git b/drivers/media/i2c/imx319.c a/drivers/media/i2c/imx319.c
> index e549692ff478..420984382173 100644
> --- b/drivers/media/i2c/imx319.c
> +++ a/drivers/media/i2c/imx319.c
> @@ -2001,7 +2001,6 @@ static int imx319_do_get_pad_format(struct imx319 *imx319,
> struct v4l2_subdev_format *fmt)
> {
> struct v4l2_mbus_framefmt *framefmt;
> - struct v4l2_subdev *sd = &imx319->sd;
>
> if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
> framefmt = v4l2_subdev_state_get_format(sd_state, fmt->pad);
> diff --git b/drivers/media/i2c/imx355.c a/drivers/media/i2c/imx355.c
> index 96bdde685d65..e1b1d2fc79dd 100644
> --- b/drivers/media/i2c/imx355.c
> +++ a/drivers/media/i2c/imx355.c
> @@ -1299,7 +1299,6 @@ static int imx355_do_get_pad_format(struct imx355 *imx355,
> struct v4l2_subdev_format *fmt)
> {
> struct v4l2_mbus_framefmt *framefmt;
> - struct v4l2_subdev *sd = &imx355->sd;
>
> if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
> framefmt = v4l2_subdev_state_get_format(sd_state, fmt->pad);
> diff --git b/drivers/media/i2c/ov08x40.c a/drivers/media/i2c/ov08x40.c
> index ca799bbcfdb7..abbb0b774d43 100644
> --- b/drivers/media/i2c/ov08x40.c
> +++ a/drivers/media/i2c/ov08x40.c
> @@ -2774,7 +2774,6 @@ static int ov08x40_do_get_pad_format(struct ov08x40 *ov08x,
> struct v4l2_subdev_format *fmt)
> {
> struct v4l2_mbus_framefmt *framefmt;
> - struct v4l2_subdev *sd = &ov08x->sd;
>
> if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
> framefmt = v4l2_subdev_state_get_format(sd_state, fmt->pad);
> diff --git b/drivers/media/i2c/ov13858.c a/drivers/media/i2c/ov13858.c
> index 7816d9787c61..09387e335d80 100644
> --- b/drivers/media/i2c/ov13858.c
> +++ a/drivers/media/i2c/ov13858.c
> @@ -1316,7 +1316,6 @@ static int ov13858_do_get_pad_format(struct ov13858 *ov13858,
> struct v4l2_subdev_format *fmt)
> {
> struct v4l2_mbus_framefmt *framefmt;
> - struct v4l2_subdev *sd = &ov13858->sd;
>
> if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
> framefmt = v4l2_subdev_state_get_format(sd_state, fmt->pad);
> diff --git b/drivers/media/i2c/ov13b10.c a/drivers/media/i2c/ov13b10.c
> index 268cd4b03f9c..c06411d5ee2b 100644
> --- b/drivers/media/i2c/ov13b10.c
> +++ a/drivers/media/i2c/ov13b10.c
> @@ -1001,7 +1001,6 @@ static int ov13b10_do_get_pad_format(struct ov13b10 *ov13b,
> struct v4l2_subdev_format *fmt)
> {
> struct v4l2_mbus_framefmt *framefmt;
> - struct v4l2_subdev *sd = &ov13b->sd;
>
> if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
> framefmt = v4l2_subdev_state_get_format(sd_state, fmt->pad);
> diff --git b/drivers/media/i2c/s5c73m3/s5c73m3-core.c a/drivers/media/i2c/s5c73m3/s5c73m3-core.c
> index 47605e36bc60..8f9b5713daf7 100644
> --- b/drivers/media/i2c/s5c73m3/s5c73m3-core.c
> +++ a/drivers/media/i2c/s5c73m3/s5c73m3-core.c
> @@ -819,7 +819,6 @@ static void s5c73m3_oif_try_format(struct s5c73m3 *state,
> struct v4l2_subdev_format *fmt,
> const struct s5c73m3_frame_size **fs)
> {
> - struct v4l2_subdev *sd = &state->sensor_sd;
> u32 code;
>
> switch (fmt->pad) {
> diff --git a/drivers/media/i2c/s5k5baf.c b/drivers/media/i2c/s5k5baf.c
> index 67da2045f543..03ccfb0e1e11 100644
> --- a/drivers/media/i2c/s5k5baf.c
> +++ b/drivers/media/i2c/s5k5baf.c
> @@ -1472,14 +1472,11 @@ static int s5k5baf_set_selection(struct v4l2_subdev *sd,
>
> if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
> rects = (struct v4l2_rect * []) {
> - &s5k5baf_cis_rect,
> - v4l2_subdev_get_try_crop(sd, sd_state,
> - PAD_CIS),
> - v4l2_subdev_get_try_compose(sd, sd_state,
> - PAD_CIS),
> - v4l2_subdev_get_try_crop(sd, sd_state,
> - PAD_OUT)
> - };
> + &s5k5baf_cis_rect,
> + v4l2_subdev_state_get_crop(sd_state, PAD_CIS),
> + v4l2_subdev_state_get_compose(sd_state, PAD_CIS),
> + v4l2_subdev_state_get_crop(sd_state, PAD_OUT)
> + };
> s5k5baf_set_rect_and_adjust(rects, rtype, &sel->r);
> return 0;
> }
> diff --git b/drivers/media/platform/samsung/s3c-camif/camif-capture.c a/drivers/media/platform/samsung/s3c-camif/camif-capture.c
> index 295e083f38e8..be58260ea67e 100644
> --- b/drivers/media/platform/samsung/s3c-camif/camif-capture.c
> +++ a/drivers/media/platform/samsung/s3c-camif/camif-capture.c
> @@ -1216,7 +1216,7 @@ static int s3c_camif_subdev_get_fmt(struct v4l2_subdev *sd,
> struct v4l2_mbus_framefmt *mf = &fmt->format;
>
> if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
> - mf = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
> + mf = v4l2_subdev_state_get_format(sd_state, fmt->pad);
> fmt->format = *mf;
> return 0;
> }
> @@ -1305,7 +1305,7 @@ static int s3c_camif_subdev_set_fmt(struct v4l2_subdev *sd,
> __camif_subdev_try_format(camif, mf, fmt->pad);
>
> if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
> - mf = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
> + mf = v4l2_subdev_state_get_format(sd_state, fmt->pad);
> *mf = fmt->format;
> mutex_unlock(&camif->lock);
> return 0;
> diff --git b/drivers/media/platform/ti/cal/cal-camerarx.c a/drivers/media/platform/ti/cal/cal-camerarx.c
> index cea454ed9c20..61433744c6c4 100644
> --- b/drivers/media/platform/ti/cal/cal-camerarx.c
> +++ a/drivers/media/platform/ti/cal/cal-camerarx.c
> @@ -621,8 +621,6 @@ static int cal_camerarx_sd_enum_mbus_code(struct v4l2_subdev *sd,
> struct v4l2_subdev_state *state,
> struct v4l2_subdev_mbus_code_enum *code)
> {
> - struct cal_camerarx *phy = to_cal_camerarx(sd);
> -
> /* No transcoding, source and sink codes must match. */
> if (cal_rx_pad_is_source(code->pad)) {
> struct v4l2_mbus_framefmt *fmt;
> diff --git b/drivers/staging/media/imx/imx-ic-prp.c a/drivers/staging/media/imx/imx-ic-prp.c
> index dd558fac6477..61d69f19657e 100644
> --- b/drivers/staging/media/imx/imx-ic-prp.c
> +++ a/drivers/staging/media/imx/imx-ic-prp.c
> @@ -82,8 +82,6 @@ static struct v4l2_mbus_framefmt *
> __prp_get_fmt(struct prp_priv *priv, struct v4l2_subdev_state *sd_state,
> unsigned int pad, enum v4l2_subdev_format_whence which)
> {
> - struct imx_ic_priv *ic_priv = priv->ic_priv;
> -
> if (which == V4L2_SUBDEV_FORMAT_TRY)
> return v4l2_subdev_state_get_format(sd_state, pad);
> else
> diff --git b/drivers/staging/media/imx/imx-ic-prpencvf.c a/drivers/staging/media/imx/imx-ic-prpencvf.c
> index 02db7dbb884b..ec73c901079e 100644
> --- b/drivers/staging/media/imx/imx-ic-prpencvf.c
> +++ a/drivers/staging/media/imx/imx-ic-prpencvf.c
> @@ -790,8 +790,6 @@ static struct v4l2_mbus_framefmt *
> __prp_get_fmt(struct prp_priv *priv, struct v4l2_subdev_state *sd_state,
> unsigned int pad, enum v4l2_subdev_format_whence which)
> {
> - struct imx_ic_priv *ic_priv = priv->ic_priv;
> -
> if (which == V4L2_SUBDEV_FORMAT_TRY)
> return v4l2_subdev_state_get_format(sd_state, pad);
> else
> diff --git a/drivers/media/i2c/st-mipid02.c b/drivers/media/i2c/st-mipid02.c
> index 9c9361354c00..b08a249b5fdd 100644
> --- a/drivers/media/i2c/st-mipid02.c
> +++ b/drivers/media/i2c/st-mipid02.c
> @@ -751,7 +751,7 @@ static void mipid02_set_fmt_source(struct v4l2_subdev *sd,
> format->format = bridge->fmt;
> else
> format->format = *v4l2_subdev_state_get_format(sd_state,
> - MIPID02_SINK_0);
> + MIPID02_SINK_0);
>
> /* but code may need to be converted */
> format->format.code = serial_to_parallel_code(format->format.code);
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
> index 117912d3bfbd..96353648c032 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
> @@ -319,7 +319,7 @@ static void rkisp1_isp_start(struct rkisp1_isp *isp,
> rkisp1_write(rkisp1, RKISP1_CIF_ISP_CTRL, val);
>
> src_fmt = v4l2_subdev_state_get_format(sd_state,
> - RKISP1_ISP_PAD_SOURCE_VIDEO);
> + RKISP1_ISP_PAD_SOURCE_VIDEO);
> src_info = rkisp1_mbus_info_get_by_code(src_fmt->code);
>
> if (src_info->pixel_enc != V4L2_PIXEL_ENC_BAYER)
> @@ -475,9 +475,9 @@ static void rkisp1_isp_set_src_fmt(struct rkisp1_isp *isp,
> sink_fmt = v4l2_subdev_state_get_format(sd_state,
> RKISP1_ISP_PAD_SINK_VIDEO);
> src_fmt = v4l2_subdev_state_get_format(sd_state,
> - RKISP1_ISP_PAD_SOURCE_VIDEO);
> + RKISP1_ISP_PAD_SOURCE_VIDEO);
> src_crop = v4l2_subdev_state_get_crop(sd_state,
> - RKISP1_ISP_PAD_SOURCE_VIDEO);
> + RKISP1_ISP_PAD_SOURCE_VIDEO);
>
> /*
> * Media bus code. The ISP can operate in pass-through mode (Bayer in,

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

media: xilinx-tpg: Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

media: v4l2-subdev: add subdev-wide state struct

We have 'struct v4l2_subdev_pad_config' which contains configuration for
a single pad used for the TRY functionality, and an array of those
structs is passed to various v4l2_subdev_pad_ops.

I was working on subdev internal routing between pads, and realized that
there's no way to add TRY functionality for routes, which is not pad
specific configuration. Adding a separate struct for try-route config
wouldn't work either, as e.g. set-fmt needs to know the try-route
configuration to propagate the settings.

This patch adds a new struct, 'struct v4l2_subdev_state' (which at the
moment only contains the v4l2_subdev_pad_config array) and the new
struct is used in most of the places where v4l2_subdev_pad_config was
used. All v4l2_subdev_pad_ops functions taking v4l2_subdev_pad_config
are changed to instead take v4l2_subdev_state.

The changes to drivers/media/v4l2-core/v4l2-subdev.c and
include/media/v4l2-subdev.h were written by hand, and all the driver
changes were done with the semantic patch below. The spatch needs to be
applied to a select list of directories. I used the following shell
commands to apply the spatch:

dirs="drivers/media/i2c drivers/media/platform drivers/media/usb drivers/media/test-drivers/vimc drivers/media/pci drivers/staging/media"
for dir in $dirs; do spatch -j8 --dir --include-headers --no-show-diff --in-place --sp-file v4l2-subdev-state.cocci $dir; done

Note that Coccinelle chokes on a few drivers (gcc extensions?). With
minor changes we can make Coccinelle run fine, and these changes can be
reverted after spatch. The diff for these changes is:

For drivers/media/i2c/s5k5baf.c:

@@ -1481,7 +1481,7 @@ static int s5k5baf_set_selection(struct v4l2_subdev *sd,
&s5k5baf_cis_rect,
v4l2_subdev_get_try_crop(sd, cfg, PAD_CIS),
v4l2_subdev_get_try_compose(sd, cfg, PAD_CIS),
- v4l2_subdev_get_try_crop(sd, cfg, PAD_OUT)
+ v4l2_subdev_get_try_crop(sd, cfg, PAD_OUT),
};
s5k5baf_set_rect_and_adjust(rects, rtype, &sel->r);
return 0;

For drivers/media/platform/s3c-camif/camif-capture.c:

@@ -1230,7 +1230,7 @@ static int s3c_camif_subdev_get_fmt(struct v4l2_subdev *sd,
*mf = camif->mbus_fmt;
break;

- case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P:
+ case CAMIF_SD_PAD_SOURCE_C:
/* crop rectangle at camera interface input */
mf->width = camif->camif_crop.width;
mf->height = camif->camif_crop.height;
@@ -1332,7 +1332,7 @@ static int s3c_camif_subdev_set_fmt(struct v4l2_subdev *sd,
}
break;

- case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P:
+ case CAMIF_SD_PAD_SOURCE_C:
/* Pixel format can be only changed on the sink pad. */
mf->code = camif->mbus_fmt.code;
mf->width = crop->width;

The semantic patch is:

// <smpl>

// Change function parameter

@@
identifier func;
identifier cfg;
@@

func(...,
- struct v4l2_subdev_pad_config *cfg
+ struct v4l2_subdev_state *sd_state
, ...)
{
<...
- cfg
+ sd_state
...>
}

// Change function declaration parameter

@@
identifier func;
identifier cfg;
type T;
@@
T func(...,
- struct v4l2_subdev_pad_config *cfg
+ struct v4l2_subdev_state *sd_state
, ...);

// Change function return value

@@
identifier func;
@@
- struct v4l2_subdev_pad_config
+ struct v4l2_subdev_state
*func(...)
{
...
}

// Change function declaration return value

@@
identifier func;
@@
- struct v4l2_subdev_pad_config
+ struct v4l2_subdev_state
*func(...);

// Some drivers pass a local pad_cfg for a single pad to a called function. Wrap it
// inside a pad_state.

@@
identifier func;
identifier pad_cfg;
@@
func(...)
{
...
struct v4l2_subdev_pad_config pad_cfg;
+ struct v4l2_subdev_state pad_state = { .pads = &pad_cfg };

<+...

(
v4l2_subdev_call
|
sensor_call
|
isi_try_fse
|
isc_try_fse
|
saa_call_all
)
(...,
- &pad_cfg
+ &pad_state
,...)

...+>
}

// If the function uses fields from pad_config, access via state->pads

@@
identifier func;
identifier state;
@@
func(...,
struct v4l2_subdev_state *state
, ...)
{
<...
(
- state->try_fmt
+ state->pads->try_fmt
|
- state->try_crop
+ state->pads->try_crop
|
- state->try_compose
+ state->pads->try_compose
)
...>
}

// If the function accesses the filehandle, use fh->state instead

@@
struct v4l2_subdev_fh *fh;
@@
- fh->pad
+ fh->state

@@
struct v4l2_subdev_fh fh;
@@
- fh.pad
+ fh.state

// Start of vsp1 specific

@@
@@
struct vsp1_entity {
...
- struct v4l2_subdev_pad_config *config;
+ struct v4l2_subdev_state *config;
...
};

@@
symbol entity;
@@
vsp1_entity_init(...)
{
...
entity->config =
- v4l2_subdev_alloc_pad_config
+ v4l2_subdev_alloc_state
(&entity->subdev);
...
}

@@
symbol entity;
@@
vsp1_entity_destroy(...)
{
...
- v4l2_subdev_free_pad_config
+ v4l2_subdev_free_state
(entity->config);
...
}

@exists@
identifier func =~ "(^vsp1.*)|(hsit_set_format)|(sru_enum_frame_size)|(sru_set_format)|(uif_get_selection)|(uif_set_selection)|(uds_enum_frame_size)|(uds_set_format)|(brx_set_format)|(brx_get_selection)|(histo_get_selection)|(histo_set_selection)|(brx_set_selection)";
symbol config;
@@
func(...) {
...
- struct v4l2_subdev_pad_config *config;
+ struct v4l2_subdev_state *config;
...
}

// End of vsp1 specific

// Start of rcar specific

@@
identifier sd;
identifier pad_cfg;
@@
rvin_try_format(...)
{
...
- struct v4l2_subdev_pad_config *pad_cfg;
+ struct v4l2_subdev_state *sd_state;
...
- pad_cfg = v4l2_subdev_alloc_pad_config(sd);
+ sd_state = v4l2_subdev_alloc_state(sd);
<...
- pad_cfg
+ sd_state
...>
- v4l2_subdev_free_pad_config(pad_cfg);
+ v4l2_subdev_free_state(sd_state);
...
}

// End of rcar specific

// Start of rockchip specific

@@
identifier func =~ "(rkisp1_rsz_get_pad_fmt)|(rkisp1_rsz_get_pad_crop)|(rkisp1_rsz_register)";
symbol rsz;
symbol pad_cfg;
@@

func(...)
{
+ struct v4l2_subdev_state state = { .pads = rsz->pad_cfg };
...
- rsz->pad_cfg
+ &state
...
}

@@
identifier func =~ "(rkisp1_isp_get_pad_fmt)|(rkisp1_isp_get_pad_crop)";
symbol isp;
symbol pad_cfg;
@@

func(...)
{
+ struct v4l2_subdev_state state = { .pads = isp->pad_cfg };
...
- isp->pad_cfg
+ &state
...
}

@@
symbol rkisp1;
symbol isp;
symbol pad_cfg;
@@

rkisp1_isp_register(...)
{
+ struct v4l2_subdev_state state = { .pads = rkisp1->isp.pad_cfg };
...
- rkisp1->isp.pad_cfg
+ &state
...
}

// End of rockchip specific

// Start of tegra-video specific

@@
identifier sd;
identifier pad_cfg;
@@
__tegra_channel_try_format(...)
{
...
- struct v4l2_subdev_pad_config *pad_cfg;
+ struct v4l2_subdev_state *sd_state;
...
- pad_cfg = v4l2_subdev_alloc_pad_config(sd);
+ sd_state = v4l2_subdev_alloc_state(sd);
<...
- pad_cfg
+ sd_state
...>
- v4l2_subdev_free_pad_config(pad_cfg);
+ v4l2_subdev_free_state(sd_state);
...
}

@@
identifier sd_state;
@@
__tegra_channel_try_format(...)
{
...
struct v4l2_subdev_state *sd_state;
<...
- sd_state->try_crop
+ sd_state->pads->try_crop
...>
}

// End of tegra-video specific

// </smpl>

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: Use of_node_name_eq for node name comparisons

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 <kyungmin.park@samsung.com>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Hyun Kwon <hyun.kwon@xilinx.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: xilinx: Use SPDX-License-Identifier

SPDX-License-Identifier is used for the Xilinx Video IP and
related drivers.

[Added drivers/media/platform/xilinx/Kconfig]
[Added drivers/media/platform/xilinx/Makefile]
[Added include/dt-bindings/media/xilinx-vip.h]

Signed-off-by: Dhaval Shah <dhaval23031987@gmail.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: use strscpy() instead of strlcpy()

The implementation of strscpy() is more robust and safer.

That's now the recommended way to copy NUL terminated strings.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

[media] media: platform: xilinx: xilinx-tpg: constify v4l2_subdev_* structures

v4l2_subdev_{core/pad/video}_ops structures are stored in the
fields of the v4l2_subdev_ops structure which are of type const.
Also, v4l2_subdev_ops structure is passed to a function
having its argument of type const. As these structures are never
modified, so declare them as const.
Done using Coccinelle: (One of the scripts used)

@r1 disable optional_qualifier @
identifier i;
position p;
@@
static struct v4l2_subdev_video_ops i@p = {...};

@ok1@
identifier r1.i;
position p;
struct v4l2_subdev_ops obj;
@@
obj.video=&i@p;

@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct v4l2_subdev_video_ops i;

File size before:
text data bss dec hex filename
6170 2752 144 9066 236a media/platform/xilinx/xilinx-tpg.o

File size after:
text data bss dec hex filename
6666 2384 8 9058 2362 media/platform/xilinx/xilinx-tpg.o

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

[media] media framework: rename pads init function to media_entity_pads_init()

With the MC next gen rework, what's left for media_entity_init()
is to just initialize the PADs. However, certain devices, like
a FLASH led/light doesn't have any input or output PAD.

So, there's no reason why calling media_entity_init() would be
mandatory. Also, despite its name, what this function actually
does is to initialize the PADs data. So, rename it to
media_entity_pads_init() in order to reflect that.

The media entity actual init happens during entity register,
at media_device_register_entity(). We should move init of
num_links and num_backlinks to it.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

[media] media: get rid of unused "extra_links" param on media_entity_init()

Currently, media_entity_init() creates an array with the links,
allocated at init time. It provides a parameter (extra_links)
that would allocate more links than the current needs, but this
is not used by any driver.

As we want to be able to do dynamic link allocation/removal,
we'll need to change the implementation of the links. So,
before doing that, let's first remove that extra unused
parameter, in order to cleanup the interface first.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

[media] v4l: xilinx-tpg: add missing of_node_put

for_each_child_of_node performs an of_node_get on each iteration, so
a break out of the loop requires an of_node_put.

A simplified version of the semantic patch that fixes this problem is as
follows (http://coccinelle.lip6.fr):

// <smpl>
@@
expression root,e;
local idexpression child;
@@

for_each_child_of_node(root, child) {
... when != of_node_put(child)
when != e = child
(
return child;
|
+ of_node_put(child);
? return ...;
)
...
}
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

[media] v4l: xilinx: Add Test Pattern Generator driver

The TPG generates multiple static or dynamic test patterns. The driver
currently hardcodes the pattern to the moving box pattern.

Signed-off-by: Christian Kohn <christian.kohn@xilinx.com>
Signed-off-by: Hyun Kwon <hyun.kwon@xilinx.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>