[media] v4l: vsp1: Add HGT support
authorNiklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Tue, 6 Sep 2016 14:38:56 +0000 (11:38 -0300)
committerMauro Carvalho Chehab <mchehab@s-opensource.com>
Sat, 15 Apr 2017 01:53:00 +0000 (22:53 -0300)
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>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
drivers/media/platform/vsp1/Makefile
drivers/media/platform/vsp1/vsp1.h
drivers/media/platform/vsp1/vsp1_drv.c
drivers/media/platform/vsp1/vsp1_entity.c
drivers/media/platform/vsp1/vsp1_hgt.c [new file with mode: 0644]
drivers/media/platform/vsp1/vsp1_hgt.h [new file with mode: 0644]
drivers/media/platform/vsp1/vsp1_pipe.c
drivers/media/platform/vsp1/vsp1_pipe.h
drivers/media/platform/vsp1/vsp1_regs.h
drivers/media/platform/vsp1/vsp1_video.c

index 8ab6a06..a33afc3 100644 (file)
@@ -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
index 0ba7521..85387a6 100644 (file)
@@ -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;
@@ -76,6 +78,7 @@ 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;
index 0acc8ed..048446a 100644 (file)
@@ -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"
@@ -161,6 +162,16 @@ static int vsp1_uapi_create_links(struct vsp1_device *vsp1)
                        return ret;
        }
 
+       if (vsp1->hgt) {
+               ret = media_create_pad_link(&vsp1->hgt->histo.entity.subdev.entity,
+                                           HISTO_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,
@@ -305,6 +316,17 @@ static int vsp1_create_entities(struct vsp1_device *vsp1)
                              &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->histo.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
@@ -591,7 +613,8 @@ static const struct vsp1_device_info vsp1_device_infos[] = {
                .model = "VSP1-S",
                .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,
@@ -623,7 +646,8 @@ static const struct vsp1_device_info vsp1_device_infos[] = {
                .model = "VSP1-S",
                .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,
@@ -655,8 +679,8 @@ static const struct vsp1_device_info vsp1_device_infos[] = {
                .version = VI6_IP_VERSION_MODEL_VSPI_GEN3,
                .model = "VSP2-I",
                .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,
index c1587e3..4bdb3b1 100644 (file)
@@ -50,6 +50,19 @@ 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;
@@ -443,6 +456,7 @@ 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_hgt.c b/drivers/media/platform/vsp1/vsp1_hgt.c
new file mode 100644 (file)
index 0000000..b5ce305
--- /dev/null
@@ -0,0 +1,222 @@
+/*
+ * 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_DATA_SIZE                          ((2 +  6 * 32) * 4)
+
+/* -----------------------------------------------------------------------------
+ * Device Access
+ */
+
+static inline u32 vsp1_hgt_read(struct vsp1_hgt *hgt, u32 reg)
+{
+       return vsp1_read(hgt->histo.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;
+       unsigned int 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 (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_try_ctrl(struct v4l2_ctrl *ctrl)
+{
+       const u8 *values = ctrl->p_new.p_u8;
+       unsigned int i;
+
+       /*
+        * The hardware has constraints on the hue area boundaries beyond the
+        * control min, max and step. The values must match one of the following
+        * expressions.
+        *
+        * 0L <= 0U <= 1L <= 1U <= 2L <= 2U <= 3L <= 3U <= 4L <= 4U <= 5L <= 5U
+        * 0U <= 1L <= 1U <= 2L <= 2U <= 3L <= 3U <= 4L <= 4U <= 5L <= 5U <= 0L
+        *
+        * Start by verifying the common part...
+        */
+       for (i = 1; i < (HGT_NUM_HUE_AREAS * 2) - 1; ++i) {
+               if (values[i] > values[i+1])
+                       return -EINVAL;
+       }
+
+       /* ... and handle 0L separately. */
+       if (values[0] > values[1] && values[11] > values[0])
+               return -EINVAL;
+
+       return 0;
+}
+
+static int hgt_hue_areas_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+       struct vsp1_hgt *hgt = container_of(ctrl->handler, struct vsp1_hgt,
+                                           ctrls);
+
+       memcpy(hgt->hue_areas, ctrl->p_new.p_u8, sizeof(hgt->hue_areas));
+       return 0;
+}
+
+static const struct v4l2_ctrl_ops hgt_hue_areas_ctrl_ops = {
+       .try_ctrl = hgt_hue_areas_try_ctrl,
+       .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 },
+};
+
+/* -----------------------------------------------------------------------------
+ * VSP1 Entity Operations
+ */
+
+static void hgt_configure(struct vsp1_entity *entity,
+                         struct vsp1_pipeline *pipe,
+                         struct vsp1_dl_list *dl,
+                         enum vsp1_entity_params params)
+{
+       struct vsp1_hgt *hgt = to_hgt(&entity->subdev);
+       struct v4l2_rect *compose;
+       struct v4l2_rect *crop;
+       unsigned int hratio;
+       unsigned int vratio;
+       u8 lower;
+       u8 upper;
+       unsigned int i;
+
+       if (params != VSP1_ENTITY_PARAMS_INIT)
+               return;
+
+       crop = vsp1_entity_get_pad_selection(entity, entity->config,
+                                            HISTO_PAD_SINK, V4L2_SEL_TGT_CROP);
+       compose = vsp1_entity_get_pad_selection(entity, entity->config,
+                                               HISTO_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.lock);
+       for (i = 0; i < HGT_NUM_HUE_AREAS; ++i) {
+               lower = hgt->hue_areas[i*2 + 0];
+               upper = hgt->hue_areas[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.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 const struct vsp1_entity_operations hgt_entity_ops = {
+       .configure = hgt_configure,
+       .destroy = vsp1_histogram_destroy,
+};
+
+/* -----------------------------------------------------------------------------
+ * Initialization and Cleanup
+ */
+
+static const unsigned int hgt_mbus_formats[] = {
+       MEDIA_BUS_FMT_AHSV8888_1X32,
+};
+
+struct vsp1_hgt *vsp1_hgt_create(struct vsp1_device *vsp1)
+{
+       struct vsp1_hgt *hgt;
+       int ret;
+
+       hgt = devm_kzalloc(vsp1->dev, sizeof(*hgt), GFP_KERNEL);
+       if (hgt == NULL)
+               return ERR_PTR(-ENOMEM);
+
+       /* Initialize the control handler. */
+       v4l2_ctrl_handler_init(&hgt->ctrls, 1);
+       v4l2_ctrl_new_custom(&hgt->ctrls, &hgt_hue_areas, NULL);
+
+       hgt->histo.entity.subdev.ctrl_handler = &hgt->ctrls;
+
+       /* Initialize the video device and queue for statistics data. */
+       ret = vsp1_histogram_init(vsp1, &hgt->histo, VSP1_ENTITY_HGT, "hgt",
+                                 &hgt_entity_ops, hgt_mbus_formats,
+                                 ARRAY_SIZE(hgt_mbus_formats),
+                                 HGT_DATA_SIZE, V4L2_META_FMT_VSP1_HGT);
+       if (ret < 0) {
+               vsp1_entity_destroy(&hgt->histo.entity);
+               return ERR_PTR(ret);
+       }
+
+       v4l2_ctrl_handler_setup(&hgt->ctrls);
+
+       return hgt;
+}
diff --git a/drivers/media/platform/vsp1/vsp1_hgt.h b/drivers/media/platform/vsp1/vsp1_hgt.h
new file mode 100644 (file)
index 0000000..83f2e13
--- /dev/null
@@ -0,0 +1,42 @@
+/*
+ * 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_histo.h"
+
+struct vsp1_device;
+
+#define HGT_NUM_HUE_AREAS                      6
+
+struct vsp1_hgt {
+       struct vsp1_histogram histo;
+
+       struct v4l2_ctrl_handler ctrls;
+
+       u8 hue_areas[HGT_NUM_HUE_AREAS * 2];
+};
+
+static inline struct vsp1_hgt *to_hgt(struct v4l2_subdev *subdev)
+{
+       return container_of(subdev, struct vsp1_hgt, histo.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__ */
index bc0460c..edebf3f 100644 (file)
@@ -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"
@@ -211,12 +212,19 @@ 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;
 }
@@ -299,6 +307,11 @@ 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;
@@ -325,6 +338,9 @@ 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);
 
index 4d91088..91a784a 100644 (file)
@@ -74,6 +74,7 @@ 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
@@ -103,6 +104,7 @@ 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;
index 5414e51..cd3e32a 100644 (file)
  */
 
 #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)
 #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
index 7bc07d4..eab3c3e 100644 (file)
@@ -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"
@@ -607,6 +608,11 @@ 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;
                }
        }