[PATCH 2/2] v4l: vsp1: Add HGT support

Niklas Söderlund
2016-09-02T14:09:59Z

The HGT is a Histogram Generator Two-Dimensions. It computes a weighted
frequency histograms for hue and saturation areas over a configurable
region of the image with optional subsampling.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
---
drivers/media/platform/vsp1/Makefile | 2 +-
drivers/media/platform/vsp1/vsp1.h | 3 +
drivers/media/platform/vsp1/vsp1_drv.c | 32 +-
drivers/media/platform/vsp1/vsp1_entity.c | 33 +-
drivers/media/platform/vsp1/vsp1_entity.h | 1 +
drivers/media/platform/vsp1/vsp1_hgt.c | 495 ++++++++++++++++++++++++++++++
drivers/media/platform/vsp1/vsp1_hgt.h | 51 +++
drivers/media/platform/vsp1/vsp1_pipe.c | 16 +
drivers/media/platform/vsp1/vsp1_pipe.h | 2 +
drivers/media/platform/vsp1/vsp1_regs.h | 9 +
drivers/media/platform/vsp1/vsp1_video.c | 10 +-
11 files changed, 638 insertions(+), 16 deletions(-)
create mode 100644 drivers/media/platform/vsp1/vsp1_hgt.c
create mode 100644 drivers/media/platform/vsp1/vsp1_hgt.h

diff --git a/drivers/media/platform/vsp1/Makefile b/drivers/media/platform/vsp1/Makefile
index 8ab6a06..a33afc3 100644
--- a/drivers/media/platform/vsp1/Makefile
+++ b/drivers/media/platform/vsp1/Makefile
@@ -3,7 +3,7 @@ vsp1-y += vsp1_dl.o vsp1_drm.o vsp1_video.o
vsp1-y += vsp1_rpf.o vsp1_rwpf.o vsp1_wpf.o
vsp1-y += vsp1_clu.o vsp1_hsit.o vsp1_lut.o
vsp1-y += vsp1_bru.o vsp1_sru.o vsp1_uds.o
-vsp1-y += vsp1_hgo.o vsp1_histo.o
+vsp1-y += vsp1_hgo.o vsp1_hgt.o vsp1_histo.o
vsp1-y += vsp1_lif.o

obj-$(CONFIG_VIDEO_RENESAS_VSP1) += vsp1.o
diff --git a/drivers/media/platform/vsp1/vsp1.h b/drivers/media/platform/vsp1/vsp1.h
index 9dce3ea..012ce40 100644
--- a/drivers/media/platform/vsp1/vsp1.h
+++ b/drivers/media/platform/vsp1/vsp1.h
@@ -33,6 +33,7 @@ struct vsp1_platform_data;
struct vsp1_bru;
struct vsp1_clu;
struct vsp1_hgo;
+struct vsp1_hgt;
struct vsp1_hsit;
struct vsp1_lif;
struct vsp1_lut;
@@ -52,6 +53,7 @@ struct vsp1_uds;
#define VSP1_HAS_WPF_VFLIP (1 << 5)
#define VSP1_HAS_WPF_HFLIP (1 << 6)
#define VSP1_HAS_HGO (1 << 7)
+#define VSP1_HAS_HGT (1 << 8)

struct vsp1_device_info {
u32 version;
@@ -74,6 +76,7 @@ struct vsp1_device {
struct vsp1_bru *bru;
struct vsp1_clu *clu;
struct vsp1_hgo *hgo;
+ struct vsp1_hgt *hgt;
struct vsp1_hsit *hsi;
struct vsp1_hsit *hst;
struct vsp1_lif *lif;
diff --git a/drivers/media/platform/vsp1/vsp1_drv.c b/drivers/media/platform/vsp1/vsp1_drv.c
index 9684abf..828584f 100644
--- a/drivers/media/platform/vsp1/vsp1_drv.c
+++ b/drivers/media/platform/vsp1/vsp1_drv.c
@@ -31,6 +31,7 @@
#include "vsp1_dl.h"
#include "vsp1_drm.h"
#include "vsp1_hgo.h"
+#include "vsp1_hgt.h"
#include "vsp1_hsit.h"
#include "vsp1_lif.h"
#include "vsp1_lut.h"
@@ -107,6 +108,7 @@ static int vsp1_create_sink_links(struct vsp1_device *vsp1,
continue;

if (source->type == VSP1_ENTITY_HGO ||
+ source->type == VSP1_ENTITY_HGT ||
source->type == VSP1_ENTITY_LIF ||
source->type == VSP1_ENTITY_WPF)
continue;
@@ -160,6 +162,16 @@ static int vsp1_uapi_create_links(struct vsp1_device *vsp1)
return ret;
}

+ if (vsp1->hgt) {
+ ret = media_create_pad_link(&vsp1->hgt->entity.subdev.entity,
+ HGT_PAD_SOURCE,
+ &vsp1->hgt->histo.video.entity, 0,
+ MEDIA_LNK_FL_ENABLED |
+ MEDIA_LNK_FL_IMMUTABLE);
+ if (ret < 0)
+ return ret;
+ }
+
if (vsp1->lif) {
ret = media_create_pad_link(&vsp1->wpf[0]->entity.subdev.entity,
RWPF_PAD_SOURCE,
@@ -300,6 +312,16 @@ static int vsp1_create_entities(struct vsp1_device *vsp1)
list_add_tail(&vsp1->hgo->entity.list_dev, &vsp1->entities);
}

+ if (vsp1->info->features & VSP1_HAS_HGT && vsp1->info->uapi) {
+ vsp1->hgt = vsp1_hgt_create(vsp1);
+ if (IS_ERR(vsp1->hgt)) {
+ ret = PTR_ERR(vsp1->hgt);
+ goto done;
+ }
+
+ list_add_tail(&vsp1->hgt->entity.list_dev, &vsp1->entities);
+ }
+
/* The LIF is only supported when used in conjunction with the DU, in
* which case the userspace API is disabled. If the userspace API is
* enabled skip the LIF, even when present.
@@ -583,7 +605,8 @@ static const struct vsp1_device_info vsp1_device_infos[] = {
.version = VI6_IP_VERSION_MODEL_VSPS_H2,
.gen = 2,
.features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_HGO
- | VSP1_HAS_LUT | VSP1_HAS_SRU | VSP1_HAS_WPF_VFLIP,
+ | VSP1_HAS_HGT | VSP1_HAS_LUT | VSP1_HAS_SRU
+ | VSP1_HAS_WPF_VFLIP,
.rpf_count = 5,
.uds_count = 3,
.wpf_count = 4,
@@ -612,7 +635,8 @@ static const struct vsp1_device_info vsp1_device_infos[] = {
.version = VI6_IP_VERSION_MODEL_VSPS_M2,
.gen = 2,
.features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_HGO
- | VSP1_HAS_LUT | VSP1_HAS_SRU | VSP1_HAS_WPF_VFLIP,
+ | VSP1_HAS_HGT | VSP1_HAS_LUT | VSP1_HAS_SRU
+ | VSP1_HAS_WPF_VFLIP,
.rpf_count = 5,
.uds_count = 1,
.wpf_count = 4,
@@ -621,8 +645,8 @@ static const struct vsp1_device_info vsp1_device_infos[] = {
}, {
.version = VI6_IP_VERSION_MODEL_VSPI_GEN3,
.gen = 3,
- .features = VSP1_HAS_CLU | VSP1_HAS_HGO | VSP1_HAS_LUT
- | VSP1_HAS_SRU | VSP1_HAS_WPF_HFLIP
+ .features = VSP1_HAS_CLU | VSP1_HAS_HGO | VSP1_HAS_HGT
+ | VSP1_HAS_LUT | VSP1_HAS_SRU | VSP1_HAS_WPF_HFLIP
| VSP1_HAS_WPF_VFLIP,
.rpf_count = 1,
.uds_count = 1,
diff --git a/drivers/media/platform/vsp1/vsp1_entity.c b/drivers/media/platform/vsp1/vsp1_entity.c
index a6b7d87..0a0c46e 100644
--- a/drivers/media/platform/vsp1/vsp1_entity.c
+++ b/drivers/media/platform/vsp1/vsp1_entity.c
@@ -49,6 +49,18 @@ void vsp1_entity_route_setup(struct vsp1_entity *entity,

vsp1_dl_list_write(dl, VI6_DPR_HGO_SMPPT, smppt);
return;
+ } else if (entity->type == VSP1_ENTITY_HGT) {
+ u32 smppt;
+
+ /* The HGT is a special case, its routing is configured on the
+ * sink pad.
+ */
+ source = media_entity_to_vsp1_entity(entity->sources[0]);
+ smppt = (pipe->output->entity.index << VI6_DPR_SMPPT_TGW_SHIFT)
+ | (source->route->output << VI6_DPR_SMPPT_PT_SHIFT);
+
+ vsp1_dl_list_write(dl, VI6_DPR_HGT_SMPPT, smppt);
+ return;
}

source = entity;
@@ -302,9 +314,10 @@ static int vsp1_entity_link_setup_source(const struct media_pad *source_pad,
= media_entity_to_vsp1_entity(sink_pad->entity);

/* Fan-out is limited to one for the normal data path plus an
- * optional HGO. We ignore the HGO here.
+ * optional HGO or HGT. We ignore the HGO and HGT here.
*/
- if (sink->type != VSP1_ENTITY_HGO) {
+ if (sink->type != VSP1_ENTITY_HGO &&
+ sink->type != VSP1_ENTITY_HGT) {
if (source->sink)
return -EBUSY;
source->sink = sink_pad->entity;
@@ -357,10 +370,10 @@ int vsp1_entity_link_setup(struct media_entity *entity,
* links originating or terminating at that pad until an enabled link is found.
*
* Our link setup implementation guarantees that the output fan-out will not be
- * higher than one for the data pipelines, except for the link to the HGO that
- * can be enabled in addition to a regular data link. When traversing outgoing
- * links this function ignores HGO entities and should thus be used in place of
- * the generic media_entity_remote_pad() function when traversing data
+ * higher than one for the data pipelines, except for the link to the HGO or HGT
+ * that can be enabled in addition to a regular data link. When traversing
+ * outgoing links this function ignores HGO entities and should thus be used in
+ * place of the generic media_entity_remote_pad() function when traversing data
* pipelines.
*
* Return a pointer to the pad at the remote end of the first found enabled
@@ -376,19 +389,20 @@ struct media_pad *vsp1_entity_remote_pad(struct media_pad *pad)
if (!(link->flags & MEDIA_LNK_FL_ENABLED))
continue;

- /* If we're the sink the source will never be an HGO. */
+ /* If we're the sink the source will never be an HGO or HGT. */
if (link->sink == pad)
return link->source;

if (link->source != pad)
continue;

- /* If the sink isn't a subdevice it can't be an HGO. */
+ /* If the sink isn't a subdevice it can't be an HGO or HGT. */
if (!is_media_entity_v4l2_subdev(link->sink->entity))
return link->sink;

entity = media_entity_to_vsp1_entity(link->sink->entity);
- if (entity->type != VSP1_ENTITY_HGO)
+ if (entity->type != VSP1_ENTITY_HGO &&
+ entity->type != VSP1_ENTITY_HGT)
return link->sink;
}

@@ -423,6 +437,7 @@ static const struct vsp1_route vsp1_routes[] = {
VI6_DPR_NODE_BRU_IN(4) }, VI6_DPR_NODE_BRU_OUT },
VSP1_ENTITY_ROUTE(CLU),
{ VSP1_ENTITY_HGO, 0, 0, { 0, }, 0 },
+ { VSP1_ENTITY_HGT, 0, 0, { 0, }, 0 },
VSP1_ENTITY_ROUTE(HSI),
VSP1_ENTITY_ROUTE(HST),
{ VSP1_ENTITY_LIF, 0, 0, { VI6_DPR_NODE_LIF, }, VI6_DPR_NODE_LIF },
diff --git a/drivers/media/platform/vsp1/vsp1_entity.h b/drivers/media/platform/vsp1/vsp1_entity.h
index 4fc2cd1..0682400 100644
--- a/drivers/media/platform/vsp1/vsp1_entity.h
+++ b/drivers/media/platform/vsp1/vsp1_entity.h
@@ -26,6 +26,7 @@ enum vsp1_entity_type {
VSP1_ENTITY_BRU,
VSP1_ENTITY_CLU,
VSP1_ENTITY_HGO,
+ VSP1_ENTITY_HGT,
VSP1_ENTITY_HSI,
VSP1_ENTITY_HST,
VSP1_ENTITY_LIF,
diff --git a/drivers/media/platform/vsp1/vsp1_hgt.c b/drivers/media/platform/vsp1/vsp1_hgt.c
new file mode 100644
index 0000000..c43373d
--- /dev/null
+++ b/drivers/media/platform/vsp1/vsp1_hgt.c
@@ -0,0 +1,495 @@
+/*
+ * vsp1_hgt.c -- R-Car VSP1 Histogram Generator 2D
+ *
+ * Copyright (C) 2016 Renesas Electronics Corporation
+ *
+ * Contact: Niklas Söderlund (niklas.soderlund@ragnatech.se)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/device.h>
+#include <linux/gfp.h>
+
+#include <media/v4l2-subdev.h>
+#include <media/videobuf2-vmalloc.h>
+
+#include "vsp1.h"
+#include "vsp1_dl.h"
+#include "vsp1_hgt.h"
+
+#define HGT_MIN_SIZE 4U
+#define HGT_MAX_SIZE 8192U
+#define HGT_DATA_SIZE ((2 + 6 + 6 * 32) * 4)
+
+/* -----------------------------------------------------------------------------
+ * Device Access
+ */
+
+static inline u32 vsp1_hgt_read(struct vsp1_hgt *hgt, u32 reg)
+{
+ return vsp1_read(hgt->entity.vsp1, reg);
+}
+
+static inline void vsp1_hgt_write(struct vsp1_hgt *hgt, struct vsp1_dl_list *dl,
+ u32 reg, u32 data)
+{
+ vsp1_dl_list_write(dl, reg, data);
+}
+
+/* -----------------------------------------------------------------------------
+ * Frame End Handler
+ */
+
+void vsp1_hgt_frame_end(struct vsp1_entity *entity)
+{
+ struct vsp1_hgt *hgt = to_hgt(&entity->subdev);
+ struct vsp1_histogram_buffer *buf;
+ unsigned int m, n;
+ u32 *data;
+
+ buf = vsp1_histogram_buffer_get(&hgt->histo);
+ if (!buf)
+ return;
+
+ data = buf->addr;
+
+ *data++ = vsp1_hgt_read(hgt, VI6_HGT_MAXMIN);
+ *data++ = vsp1_hgt_read(hgt, VI6_HGT_SUM);
+
+ for (n = 0; n < 6; n++)
+ *data++ = vsp1_hgt_read(hgt, VI6_HGT_HUE_AREA(n));
+
+ for (m = 0; m < 6; m++)
+ for (n = 0; n < 32; n++)
+ *data++ = vsp1_hgt_read(hgt, VI6_HGT_HISTO(m, n));
+
+ vsp1_histogram_buffer_complete(&hgt->histo, buf, HGT_DATA_SIZE);
+}
+
+/* -----------------------------------------------------------------------------
+ * Controls
+ */
+
+#define V4L2_CID_VSP1_HGT_HUE_AREAS (V4L2_CID_USER_BASE | 0x1001)
+
+static int hgt_hue_areas_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct vsp1_hgt *hgt = container_of(ctrl->handler, struct vsp1_hgt,
+ ctrls.handler);
+ int m, n;
+ bool ok;
+
+ /*
+ * Make sure values meet one of two possible HW constrains
+ * 0L <= 0U <= 1L <= 1U <= 2L <= 2U <= 3L <= 3U <= 4L <= 4U <= 5L <= 5U
+ * 0U <= 1L <= 1U <= 2L <= 2U <= 3L <= 3U <= 4L <= 4U <= 5L <= 5U <= 0L
+ */
+ for (m = 0; m <= 1; m++) {
+ ok = true;
+ for (n = 0; n < HGT_NUM_HUE_AREAS - 1; n++) {
+ if (ctrl->p_new.p_u8[(m + n + 0) % HGT_NUM_HUE_AREAS] >
+ ctrl->p_new.p_u8[(m + n + 1) % HGT_NUM_HUE_AREAS])
+ ok = false;
+ }
+ if (ok)
+ break;
+ }
+
+ /* Values do not match HW, adjust to a valid setting */
+ if (!ok) {
+ for (n = 0; n < HGT_NUM_HUE_AREAS - 1; n++) {
+ if (ctrl->p_new.p_u8[n] > ctrl->p_new.p_u8[n+1])
+ ctrl->p_new.p_u8[n] = ctrl->p_new.p_u8[n+1];
+ }
+ }
+
+ for (n = 0; n < HGT_NUM_HUE_AREAS; n++)
+ hgt->hue_area[n] = ctrl->p_new.p_u8[n];
+
+ return 0;
+}
+
+static const struct v4l2_ctrl_ops hgt_hue_areas_ctrl_ops = {
+ .s_ctrl = hgt_hue_areas_s_ctrl,
+};
+
+static const struct v4l2_ctrl_config hgt_hue_areas = {
+ .ops = &hgt_hue_areas_ctrl_ops,
+ .id = V4L2_CID_VSP1_HGT_HUE_AREAS,
+ .name = "Boundary Values for Hue Area",
+ .type = V4L2_CTRL_TYPE_U8,
+ .min = 0,
+ .max = 255,
+ .def = 0,
+ .step = 1,
+ .dims = { 12 },
+};
+
+
+/* -----------------------------------------------------------------------------
+ * V4L2 Subdevice Operations
+ */
+
+static int hgt_enum_mbus_code(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ static const unsigned int codes[] = {
+ MEDIA_BUS_FMT_AHSV8888_1X32,
+ };
+
+ if (code->pad == HGT_PAD_SOURCE) {
+ code->code = MEDIA_BUS_FMT_FIXED;
+ return 0;
+ }
+
+ return vsp1_subdev_enum_mbus_code(subdev, cfg, code, codes,
+ ARRAY_SIZE(codes));
+}
+
+static int hgt_enum_frame_size(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ if (fse->pad != HGT_PAD_SINK)
+ return -EINVAL;
+
+ return vsp1_subdev_enum_frame_size(subdev, cfg, fse, HGT_MIN_SIZE,
+ HGT_MIN_SIZE, HGT_MAX_SIZE,
+ HGT_MAX_SIZE);
+}
+
+static int hgt_get_selection(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_selection *sel)
+{
+ struct vsp1_hgt *hgt = to_hgt(subdev);
+ struct v4l2_subdev_pad_config *config;
+ struct v4l2_mbus_framefmt *format;
+ struct v4l2_rect *crop;
+
+ if (sel->pad != HGT_PAD_SINK)
+ return -EINVAL;
+
+ config = vsp1_entity_get_pad_config(&hgt->entity, cfg, sel->which);
+ if (!config)
+ return -EINVAL;
+
+ switch (sel->target) {
+ case V4L2_SEL_TGT_COMPOSE_BOUNDS:
+ case V4L2_SEL_TGT_COMPOSE_DEFAULT:
+ crop = vsp1_entity_get_pad_selection(&hgt->entity, config,
+ HGT_PAD_SINK,
+ V4L2_SEL_TGT_CROP);
+ sel->r.left = 0;
+ sel->r.top = 0;
+ sel->r.width = crop->width;
+ sel->r.height = crop->height;
+ return 0;
+
+ case V4L2_SEL_TGT_CROP_BOUNDS:
+ case V4L2_SEL_TGT_CROP_DEFAULT:
+ format = vsp1_entity_get_pad_format(&hgt->entity, config,
+ HGT_PAD_SINK);
+ sel->r.left = 0;
+ sel->r.top = 0;
+ sel->r.width = format->width;
+ sel->r.height = format->height;
+ return 0;
+
+ case V4L2_SEL_TGT_COMPOSE:
+ case V4L2_SEL_TGT_CROP:
+ sel->r = *vsp1_entity_get_pad_selection(&hgt->entity, config,
+ sel->pad, sel->target);
+ return 0;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int hgt_set_crop(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *config,
+ struct v4l2_subdev_selection *sel)
+{
+ struct vsp1_hgt *hgt = to_hgt(subdev);
+ struct v4l2_mbus_framefmt *format;
+ struct v4l2_rect *selection;
+
+ /* The crop rectangle must be inside the input frame. */
+ format = vsp1_entity_get_pad_format(&hgt->entity, config, HGT_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, HGT_MIN_SIZE,
+ format->width - sel->r.left);
+ sel->r.height = clamp_t(unsigned int, sel->r.height, HGT_MIN_SIZE,
+ format->height - sel->r.top);
+
+ /* Set the crop rectangle and reset the compose rectangle. */
+ selection = vsp1_entity_get_pad_selection(&hgt->entity, config,
+ sel->pad, V4L2_SEL_TGT_CROP);
+ *selection = sel->r;
+
+ selection = vsp1_entity_get_pad_selection(&hgt->entity, config,
+ sel->pad,
+ V4L2_SEL_TGT_COMPOSE);
+ *selection = sel->r;
+
+ return 0;
+}
+
+static int hgt_set_compose(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *config,
+ struct v4l2_subdev_selection *sel)
+{
+ struct vsp1_hgt *hgt = to_hgt(subdev);
+ struct v4l2_rect *compose;
+ struct v4l2_rect *crop;
+ unsigned int ratio;
+
+ /* The compose rectangle is used to configure downscaling, the top left
+ * corner is fixed to (0,0) and the size to 1/2 or 1/4 of the crop
+ * rectangle.
+ */
+ sel->r.left = 0;
+ sel->r.top = 0;
+
+ crop = vsp1_entity_get_pad_selection(&hgt->entity, config, sel->pad,
+ V4L2_SEL_TGT_CROP);
+
+ /* Clamp the width and height to acceptable values first and then
+ * compute the closest rounded dividing ratio.
+ *
+ * Ratio Rounded ratio
+ * --------------------------
+ * [1.0 1.5[ 1
+ * [1.5 3.0[ 2
+ * [3.0 4.0] 4
+ *
+ * The rounded ratio can be computed using
+ *
+ * 1 << (ceil(ratio * 2) / 3)
+ */
+ sel->r.width = clamp(sel->r.width, crop->width / 4, crop->width);
+ ratio = 1 << (crop->width * 2 / sel->r.width / 3);
+ sel->r.width = crop->width / ratio;
+
+
+ sel->r.height = clamp(sel->r.height, crop->height / 4, crop->height);
+ ratio = 1 << (crop->height * 2 / sel->r.height / 3);
+ sel->r.height = crop->height / ratio;
+
+ compose = vsp1_entity_get_pad_selection(&hgt->entity, config, sel->pad,
+ V4L2_SEL_TGT_COMPOSE);
+ *compose = sel->r;
+
+ return 0;
+}
+
+static int hgt_set_selection(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_selection *sel)
+{
+ struct vsp1_hgt *hgt = to_hgt(subdev);
+ struct v4l2_subdev_pad_config *config;
+
+ if (sel->pad != HGT_PAD_SINK)
+ return -EINVAL;
+
+ config = vsp1_entity_get_pad_config(&hgt->entity, cfg, sel->which);
+ if (!config)
+ return -EINVAL;
+
+ if (sel->target == V4L2_SEL_TGT_CROP)
+ return hgt_set_crop(subdev, config, sel);
+ else if (sel->target == V4L2_SEL_TGT_COMPOSE)
+ return hgt_set_compose(subdev, config, sel);
+ else
+ return -EINVAL;
+}
+
+static int hgt_get_format(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ if (fmt->pad == HGT_PAD_SOURCE) {
+ fmt->format.code = MEDIA_BUS_FMT_FIXED;
+ fmt->format.width = 0;
+ fmt->format.height = 0;
+ fmt->format.field = V4L2_FIELD_NONE;
+ fmt->format.colorspace = V4L2_COLORSPACE_RAW;
+ return 0;
+ }
+
+ return vsp1_subdev_get_pad_format(subdev, cfg, fmt);
+}
+
+static int hgt_set_format(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct vsp1_hgt *hgt = to_hgt(subdev);
+ struct v4l2_subdev_pad_config *config;
+ struct v4l2_mbus_framefmt *format;
+ struct v4l2_rect *selection;
+
+ if (fmt->pad != HGT_PAD_SINK)
+ return hgt_get_format(subdev, cfg, fmt);
+
+ config = vsp1_entity_get_pad_config(&hgt->entity, cfg, fmt->which);
+ if (!config)
+ return -EINVAL;
+
+ /* HSV is the only supported format */
+ fmt->format.code = MEDIA_BUS_FMT_AHSV8888_1X32;
+
+ format = vsp1_entity_get_pad_format(&hgt->entity, config, fmt->pad);
+
+ format->code = fmt->format.code;
+ format->width = clamp_t(unsigned int, fmt->format.width,
+ HGT_MIN_SIZE, HGT_MAX_SIZE);
+ format->height = clamp_t(unsigned int, fmt->format.height,
+ HGT_MIN_SIZE, HGT_MAX_SIZE);
+ format->field = V4L2_FIELD_NONE;
+ format->colorspace = V4L2_COLORSPACE_SRGB;
+
+ fmt->format = *format;
+
+ /* Reset the crop and compose rectangles */
+ selection = vsp1_entity_get_pad_selection(&hgt->entity, config,
+ fmt->pad, V4L2_SEL_TGT_CROP);
+ selection->left = 0;
+ selection->top = 0;
+ selection->width = format->width;
+ selection->height = format->height;
+
+ selection = vsp1_entity_get_pad_selection(&hgt->entity, config,
+ fmt->pad,
+ V4L2_SEL_TGT_COMPOSE);
+ selection->left = 0;
+ selection->top = 0;
+ selection->width = format->width;
+ selection->height = format->height;
+
+ return 0;
+}
+
+static const struct v4l2_subdev_pad_ops hgt_pad_ops = {
+ .enum_mbus_code = hgt_enum_mbus_code,
+ .enum_frame_size = hgt_enum_frame_size,
+ .get_fmt = hgt_get_format,
+ .set_fmt = hgt_set_format,
+ .get_selection = hgt_get_selection,
+ .set_selection = hgt_set_selection,
+};
+
+static const struct v4l2_subdev_ops hgt_ops = {
+ .pad = &hgt_pad_ops,
+};
+
+/* -----------------------------------------------------------------------------
+ * VSP1 Entity Operations
+ */
+
+static void hgt_configure(struct vsp1_entity *entity,
+ struct vsp1_pipeline *pipe,
+ struct vsp1_dl_list *dl, bool full)
+{
+ struct vsp1_hgt *hgt = to_hgt(&entity->subdev);
+ struct v4l2_rect *compose;
+ struct v4l2_rect *crop;
+ unsigned int hratio;
+ unsigned int vratio;
+ uint8_t lower, upper;
+ int i;
+
+ if (!full)
+ return;
+
+ crop = vsp1_entity_get_pad_selection(entity, entity->config,
+ HGT_PAD_SINK, V4L2_SEL_TGT_CROP);
+ compose = vsp1_entity_get_pad_selection(entity, entity->config,
+ HGT_PAD_SINK,
+ V4L2_SEL_TGT_COMPOSE);
+
+ vsp1_hgt_write(hgt, dl, VI6_HGT_REGRST, VI6_HGT_REGRST_RCLEA);
+
+ vsp1_hgt_write(hgt, dl, VI6_HGT_OFFSET,
+ (crop->left << VI6_HGT_OFFSET_HOFFSET_SHIFT) |
+ (crop->top << VI6_HGT_OFFSET_VOFFSET_SHIFT));
+ vsp1_hgt_write(hgt, dl, VI6_HGT_SIZE,
+ (crop->width << VI6_HGT_SIZE_HSIZE_SHIFT) |
+ (crop->height << VI6_HGT_SIZE_VSIZE_SHIFT));
+
+ mutex_lock(hgt->ctrls.handler.lock);
+ for (i = 0; i < 6; i++) {
+ lower = hgt->hue_area[i*2 + 0];
+ upper = hgt->hue_area[i*2 + 1];
+ vsp1_hgt_write(hgt, dl, VI6_HGT_HUE_AREA(i),
+ (lower << VI6_HGT_HUE_AREA_LOWER_SHIFT) |
+ (upper << VI6_HGT_HUE_AREA_UPPER_SHIFT));
+ }
+ mutex_unlock(hgt->ctrls.handler.lock);
+
+ hratio = crop->width * 2 / compose->width / 3;
+ vratio = crop->height * 2 / compose->height / 3;
+ vsp1_hgt_write(hgt, dl, VI6_HGT_MODE,
+ (hratio << VI6_HGT_MODE_HRATIO_SHIFT) |
+ (vratio << VI6_HGT_MODE_VRATIO_SHIFT));
+}
+
+static void hgt_destroy(struct vsp1_entity *entity)
+{
+ struct vsp1_hgt *hgt = to_hgt(&entity->subdev);
+
+ vsp1_histogram_cleanup(&hgt->histo);
+}
+
+static const struct vsp1_entity_operations hgt_entity_ops = {
+ .configure = hgt_configure,
+ .destroy = hgt_destroy,
+};
+
+/* -----------------------------------------------------------------------------
+ * Initialization and Cleanup
+ */
+
+struct vsp1_hgt *vsp1_hgt_create(struct vsp1_device *vsp1)
+{
+ struct vsp1_hgt *hgt;
+ int i, ret;
+
+ hgt = devm_kzalloc(vsp1->dev, sizeof(*hgt), GFP_KERNEL);
+ if (hgt == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ hgt->entity.ops = &hgt_entity_ops;
+ hgt->entity.type = VSP1_ENTITY_HGT;
+
+ ret = vsp1_entity_init(vsp1, &hgt->entity, "hgt", 2, &hgt_ops,
+ MEDIA_ENT_F_PROC_VIDEO_STATISTICS);
+ if (ret < 0)
+ return ERR_PTR(ret);
+
+ /* Initialize the control handler. */
+ for (i = 0; i < HGT_NUM_HUE_AREAS; i++)
+ hgt->hue_area[i] = hgt_hue_areas.def;
+ v4l2_ctrl_handler_init(&hgt->ctrls.handler, 12);
+ hgt->ctrls.hue_areas = v4l2_ctrl_new_custom(&hgt->ctrls.handler,
+ &hgt_hue_areas, NULL);
+ hgt->entity.subdev.ctrl_handler = &hgt->ctrls.handler;
+
+ /* Initialize the video device and queue for statistics data. */
+ ret = vsp1_histogram_init(vsp1, &hgt->histo, hgt->entity.subdev.name,
+ HGT_DATA_SIZE, V4L2_META_FMT_VSP1_HGT);
+ if (ret < 0) {
+ vsp1_entity_destroy(&hgt->entity);
+ return ERR_PTR(ret);
+ }
+
+ return hgt;
+}
diff --git a/drivers/media/platform/vsp1/vsp1_hgt.h b/drivers/media/platform/vsp1/vsp1_hgt.h
new file mode 100644
index 0000000..a2f1eae
--- /dev/null
+++ b/drivers/media/platform/vsp1/vsp1_hgt.h
@@ -0,0 +1,51 @@
+/*
+ * vsp1_hgt.h -- R-Car VSP1 Histogram Generator 2D
+ *
+ * Copyright (C) 2016 Renesas Electronics Corporation
+ *
+ * Contact: Niklas Söderlund (niklas.soderlund@ragnatech.se)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+#ifndef __VSP1_HGT_H__
+#define __VSP1_HGT_H__
+
+#include <media/media-entity.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-subdev.h>
+
+#include "vsp1_entity.h"
+#include "vsp1_histo.h"
+
+struct vsp1_device;
+
+#define HGT_PAD_SINK 0
+#define HGT_PAD_SOURCE 1
+
+#define HGT_NUM_HUE_AREAS 12
+
+struct vsp1_hgt {
+ struct vsp1_entity entity;
+ struct vsp1_histogram histo;
+
+ struct {
+ struct v4l2_ctrl_handler handler;
+ struct v4l2_ctrl *hue_areas;
+ } ctrls;
+
+ unsigned int hue_area[HGT_NUM_HUE_AREAS];
+};
+
+
+static inline struct vsp1_hgt *to_hgt(struct v4l2_subdev *subdev)
+{
+ return container_of(subdev, struct vsp1_hgt, entity.subdev);
+}
+
+struct vsp1_hgt *vsp1_hgt_create(struct vsp1_device *vsp1);
+void vsp1_hgt_frame_end(struct vsp1_entity *hgt);
+
+#endif /* __VSP1_HGT_H__ */
diff --git a/drivers/media/platform/vsp1/vsp1_pipe.c b/drivers/media/platform/vsp1/vsp1_pipe.c
index 0dd7c16..052a603 100644
--- a/drivers/media/platform/vsp1/vsp1_pipe.c
+++ b/drivers/media/platform/vsp1/vsp1_pipe.c
@@ -24,6 +24,7 @@
#include "vsp1_dl.h"
#include "vsp1_entity.h"
#include "vsp1_hgo.h"
+#include "vsp1_hgt.h"
#include "vsp1_pipe.h"
#include "vsp1_rwpf.h"
#include "vsp1_uds.h"
@@ -191,12 +192,19 @@ void vsp1_pipeline_reset(struct vsp1_pipeline *pipe)
hgo->histo.pipe = NULL;
}

+ if (pipe->hgt) {
+ struct vsp1_hgt *hgt = to_hgt(&pipe->hgt->subdev);
+
+ hgt->histo.pipe = NULL;
+ }
+
INIT_LIST_HEAD(&pipe->entities);
pipe->state = VSP1_PIPELINE_STOPPED;
pipe->buffers_ready = 0;
pipe->num_inputs = 0;
pipe->bru = NULL;
pipe->hgo = NULL;
+ pipe->hgt = NULL;
pipe->lif = NULL;
pipe->uds = NULL;
}
@@ -278,6 +286,11 @@ int vsp1_pipeline_stop(struct vsp1_pipeline *pipe)
(7 << VI6_DPR_SMPPT_TGW_SHIFT) |
(VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT));

+ if (pipe->hgt)
+ vsp1_write(vsp1, VI6_DPR_HGT_SMPPT,
+ (7 << VI6_DPR_SMPPT_TGW_SHIFT) |
+ (VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT));
+
v4l2_subdev_call(&pipe->output->entity.subdev, video, s_stream, 0);

return ret;
@@ -304,6 +317,9 @@ void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe)
if (pipe->hgo)
vsp1_hgo_frame_end(pipe->hgo);

+ if (pipe->hgt)
+ vsp1_hgt_frame_end(pipe->hgt);
+
if (pipe->frame_end)
pipe->frame_end(pipe);

diff --git a/drivers/media/platform/vsp1/vsp1_pipe.h b/drivers/media/platform/vsp1/vsp1_pipe.h
index bd42eff..740bde2 100644
--- a/drivers/media/platform/vsp1/vsp1_pipe.h
+++ b/drivers/media/platform/vsp1/vsp1_pipe.h
@@ -73,6 +73,7 @@ enum vsp1_pipeline_state {
* @output: WPF at the output of the pipeline
* @bru: BRU entity, if present
* @hgo: HGO entity, if present
+ * @hgt: HGT entity, if present
* @lif: LIF entity, if present
* @uds: UDS entity, if present
* @uds_input: entity at the input of the UDS, if the UDS is present
@@ -99,6 +100,7 @@ struct vsp1_pipeline {
struct vsp1_rwpf *output;
struct vsp1_entity *bru;
struct vsp1_entity *hgo;
+ struct vsp1_entity *hgt;
struct vsp1_entity *lif;
struct vsp1_entity *uds;
struct vsp1_entity *uds_input;
diff --git a/drivers/media/platform/vsp1/vsp1_regs.h b/drivers/media/platform/vsp1/vsp1_regs.h
index d821348..d1d9af9 100644
--- a/drivers/media/platform/vsp1/vsp1_regs.h
+++ b/drivers/media/platform/vsp1/vsp1_regs.h
@@ -628,9 +628,17 @@
*/

#define VI6_HGT_OFFSET 0x3400
+#define VI6_HGT_OFFSET_HOFFSET_SHIFT 16
+#define VI6_HGT_OFFSET_VOFFSET_SHIFT 0
#define VI6_HGT_SIZE 0x3404
+#define VI6_HGT_SIZE_HSIZE_SHIFT 16
+#define VI6_HGT_SIZE_VSIZE_SHIFT 0
#define VI6_HGT_MODE 0x3408
+#define VI6_HGT_MODE_HRATIO_SHIFT 2
+#define VI6_HGT_MODE_VRATIO_SHIFT 0
#define VI6_HGT_HUE_AREA(n) (0x340c + (n) * 4)
+#define VI6_HGT_HUE_AREA_LOWER_SHIFT 16
+#define VI6_HGT_HUE_AREA_UPPER_SHIFT 0
#define VI6_HGT_LB_TH 0x3424
#define VI6_HGT_LBn_H(n) (0x3438 + (n) * 8)
#define VI6_HGT_LBn_V(n) (0x342c + (n) * 8)
@@ -639,6 +647,7 @@
#define VI6_HGT_SUM 0x3754
#define VI6_HGT_LB_DET 0x3758
#define VI6_HGT_REGRST 0x37fc
+#define VI6_HGT_REGRST_RCLEA (1 << 0)

/* -----------------------------------------------------------------------------
* LIF Control Registers
diff --git a/drivers/media/platform/vsp1/vsp1_video.c b/drivers/media/platform/vsp1/vsp1_video.c
index 75e6e6c..7215e08 100644
--- a/drivers/media/platform/vsp1/vsp1_video.c
+++ b/drivers/media/platform/vsp1/vsp1_video.c
@@ -32,6 +32,7 @@
#include "vsp1_dl.h"
#include "vsp1_entity.h"
#include "vsp1_hgo.h"
+#include "vsp1_hgt.h"
#include "vsp1_pipe.h"
#include "vsp1_rwpf.h"
#include "vsp1_uds.h"
@@ -326,7 +327,7 @@ static int vsp1_video_pipeline_build_branch(struct vsp1_pipeline *pipe,
if (ret < 0)
return ret;

- /* The main data path doesn't include the HGO, use
+ /* The main data path doesn't include the HGO or HGT, use
* vsp1_entity_remote_pad() to traverse the graph.
*/

@@ -382,7 +383,7 @@ static int vsp1_video_pipeline_build_branch(struct vsp1_pipeline *pipe,
: &input->entity;
}

- /* Follow the source link, ignoring any HGO. */
+ /* Follow the source link, ignoring any HGO or HGT. */
pad = &entity->pads[entity->source_pad];
pad = vsp1_entity_remote_pad(pad);
}
@@ -444,6 +445,11 @@ static int vsp1_video_pipeline_build(struct vsp1_pipeline *pipe,

pipe->hgo = e;
hgo->histo.pipe = pipe;
+ } else if (e->type == VSP1_ENTITY_HGT) {
+ struct vsp1_hgt *hgt = to_hgt(subdev);
+
+ pipe->hgt = e;
+ hgt->histo.pipe = pipe;
}
}

--
2.9.3