linux/drivers/media/platform/vsp1/vsp1_uif.c
Tomi Valkeinen 0d346d2a6f 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>
2021-06-17 10:01:27 +02:00

269 lines
6.9 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* vsp1_uif.c -- R-Car VSP1 User Logic Interface
*
* Copyright (C) 2017-2018 Laurent Pinchart
*
* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*/
#include <linux/device.h>
#include <linux/gfp.h>
#include <linux/sys_soc.h>
#include <media/media-entity.h>
#include <media/v4l2-subdev.h>
#include "vsp1.h"
#include "vsp1_dl.h"
#include "vsp1_entity.h"
#include "vsp1_uif.h"
#define UIF_MIN_SIZE 4U
#define UIF_MAX_SIZE 8190U
/* -----------------------------------------------------------------------------
* Device Access
*/
static inline u32 vsp1_uif_read(struct vsp1_uif *uif, u32 reg)
{
return vsp1_read(uif->entity.vsp1,
uif->entity.index * VI6_UIF_OFFSET + reg);
}
static inline void vsp1_uif_write(struct vsp1_uif *uif,
struct vsp1_dl_body *dlb, u32 reg, u32 data)
{
vsp1_dl_body_write(dlb, reg + uif->entity.index * VI6_UIF_OFFSET, data);
}
u32 vsp1_uif_get_crc(struct vsp1_uif *uif)
{
return vsp1_uif_read(uif, VI6_UIF_DISCOM_DOCMCCRCR);
}
/* -----------------------------------------------------------------------------
* V4L2 Subdevice Pad Operations
*/
static const unsigned int uif_codes[] = {
MEDIA_BUS_FMT_ARGB8888_1X32,
MEDIA_BUS_FMT_AHSV8888_1X32,
MEDIA_BUS_FMT_AYUV8_1X32,
};
static int uif_enum_mbus_code(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
return vsp1_subdev_enum_mbus_code(subdev, sd_state, code, uif_codes,
ARRAY_SIZE(uif_codes));
}
static int uif_enum_frame_size(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
return vsp1_subdev_enum_frame_size(subdev, sd_state, fse,
UIF_MIN_SIZE,
UIF_MIN_SIZE, UIF_MAX_SIZE,
UIF_MAX_SIZE);
}
static int uif_set_format(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
return vsp1_subdev_set_pad_format(subdev, sd_state, fmt, uif_codes,
ARRAY_SIZE(uif_codes),
UIF_MIN_SIZE, UIF_MIN_SIZE,
UIF_MAX_SIZE, UIF_MAX_SIZE);
}
static int uif_get_selection(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
{
struct vsp1_uif *uif = to_uif(subdev);
struct v4l2_subdev_state *config;
struct v4l2_mbus_framefmt *format;
int ret = 0;
if (sel->pad != UIF_PAD_SINK)
return -EINVAL;
mutex_lock(&uif->entity.lock);
config = vsp1_entity_get_pad_config(&uif->entity, sd_state,
sel->which);
if (!config) {
ret = -EINVAL;
goto done;
}
switch (sel->target) {
case V4L2_SEL_TGT_CROP_BOUNDS:
case V4L2_SEL_TGT_CROP_DEFAULT:
format = vsp1_entity_get_pad_format(&uif->entity, config,
UIF_PAD_SINK);
sel->r.left = 0;
sel->r.top = 0;
sel->r.width = format->width;
sel->r.height = format->height;
break;
case V4L2_SEL_TGT_CROP:
sel->r = *vsp1_entity_get_pad_selection(&uif->entity, config,
sel->pad, sel->target);
break;
default:
ret = -EINVAL;
break;
}
done:
mutex_unlock(&uif->entity.lock);
return ret;
}
static int uif_set_selection(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
{
struct vsp1_uif *uif = to_uif(subdev);
struct v4l2_subdev_state *config;
struct v4l2_mbus_framefmt *format;
struct v4l2_rect *selection;
int ret = 0;
if (sel->pad != UIF_PAD_SINK ||
sel->target != V4L2_SEL_TGT_CROP)
return -EINVAL;
mutex_lock(&uif->entity.lock);
config = vsp1_entity_get_pad_config(&uif->entity, sd_state,
sel->which);
if (!config) {
ret = -EINVAL;
goto done;
}
/* The crop rectangle must be inside the input frame. */
format = vsp1_entity_get_pad_format(&uif->entity, config, UIF_PAD_SINK);
sel->r.left = clamp_t(unsigned int, sel->r.left, 0, format->width - 1);
sel->r.top = clamp_t(unsigned int, sel->r.top, 0, format->height - 1);
sel->r.width = clamp_t(unsigned int, sel->r.width, UIF_MIN_SIZE,
format->width - sel->r.left);
sel->r.height = clamp_t(unsigned int, sel->r.height, UIF_MIN_SIZE,
format->height - sel->r.top);
/* Store the crop rectangle. */
selection = vsp1_entity_get_pad_selection(&uif->entity, config,
sel->pad, V4L2_SEL_TGT_CROP);
*selection = sel->r;
done:
mutex_unlock(&uif->entity.lock);
return ret;
}
/* -----------------------------------------------------------------------------
* V4L2 Subdevice Operations
*/
static const struct v4l2_subdev_pad_ops uif_pad_ops = {
.init_cfg = vsp1_entity_init_cfg,
.enum_mbus_code = uif_enum_mbus_code,
.enum_frame_size = uif_enum_frame_size,
.get_fmt = vsp1_subdev_get_pad_format,
.set_fmt = uif_set_format,
.get_selection = uif_get_selection,
.set_selection = uif_set_selection,
};
static const struct v4l2_subdev_ops uif_ops = {
.pad = &uif_pad_ops,
};
/* -----------------------------------------------------------------------------
* VSP1 Entity Operations
*/
static void uif_configure_stream(struct vsp1_entity *entity,
struct vsp1_pipeline *pipe,
struct vsp1_dl_list *dl,
struct vsp1_dl_body *dlb)
{
struct vsp1_uif *uif = to_uif(&entity->subdev);
const struct v4l2_rect *crop;
unsigned int left;
unsigned int width;
vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMPMR,
VI6_UIF_DISCOM_DOCMPMR_SEL(9));
crop = vsp1_entity_get_pad_selection(entity, entity->config,
UIF_PAD_SINK, V4L2_SEL_TGT_CROP);
left = crop->left;
width = crop->width;
/* On M3-W the horizontal coordinates are twice the register value. */
if (uif->m3w_quirk) {
left /= 2;
width /= 2;
}
vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSPXR, left);
vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSPYR, crop->top);
vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSZXR, width);
vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMSZYR, crop->height);
vsp1_uif_write(uif, dlb, VI6_UIF_DISCOM_DOCMCR,
VI6_UIF_DISCOM_DOCMCR_CMPR);
}
static const struct vsp1_entity_operations uif_entity_ops = {
.configure_stream = uif_configure_stream,
};
/* -----------------------------------------------------------------------------
* Initialization and Cleanup
*/
static const struct soc_device_attribute vsp1_r8a7796[] = {
{ .soc_id = "r8a7796" },
{ /* sentinel */ }
};
struct vsp1_uif *vsp1_uif_create(struct vsp1_device *vsp1, unsigned int index)
{
struct vsp1_uif *uif;
char name[6];
int ret;
uif = devm_kzalloc(vsp1->dev, sizeof(*uif), GFP_KERNEL);
if (!uif)
return ERR_PTR(-ENOMEM);
if (soc_device_match(vsp1_r8a7796))
uif->m3w_quirk = true;
uif->entity.ops = &uif_entity_ops;
uif->entity.type = VSP1_ENTITY_UIF;
uif->entity.index = index;
/* The datasheet names the two UIF instances UIF4 and UIF5. */
sprintf(name, "uif.%u", index + 4);
ret = vsp1_entity_init(vsp1, &uif->entity, name, 2, &uif_ops,
MEDIA_ENT_F_PROC_VIDEO_STATISTICS);
if (ret < 0)
return ERR_PTR(ret);
return uif;
}