1 files changed, 222 insertions, 0 deletions

diff --git a/drivers/media/platform/vsp1/vsp1_hsit.c b/drivers/media/platform/vsp1/vsp1_hsit.c
new file mode 100644
index 000000000000..285485350d82
--- /dev/null
+++ b/drivers/media/platform/vsp1/vsp1_hsit.c
@@ -0,0 +1,222 @@
+/*
+ * vsp1_hsit.c  --  R-Car VSP1 Hue Saturation value (Inverse) Transform
+ *
+ * Copyright (C) 2013 Renesas Corporation
+ *
+ * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ *
+ * 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 "vsp1.h"
+#include "vsp1_hsit.h"
+
+#define HSIT_MIN_SIZE                           4U
+#define HSIT_MAX_SIZE                           8190U
+
+/* -----------------------------------------------------------------------------
+ * Device Access
+ */
+
+static inline u32 vsp1_hsit_read(struct vsp1_hsit *hsit, u32 reg)
+{
+        return vsp1_read(hsit->entity.vsp1, reg);
+}
+
+static inline void vsp1_hsit_write(struct vsp1_hsit *hsit, u32 reg, u32 data)
+{
+        vsp1_write(hsit->entity.vsp1, reg, data);
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 Subdevice Core Operations
+ */
+
+static int hsit_s_stream(struct v4l2_subdev *subdev, int enable)
+{
+        struct vsp1_hsit *hsit = to_hsit(subdev);
+
+        if (!enable)
+                return 0;
+
+        if (hsit->inverse)
+                vsp1_hsit_write(hsit, VI6_HSI_CTRL, VI6_HSI_CTRL_EN);
+        else
+                vsp1_hsit_write(hsit, VI6_HST_CTRL, VI6_HST_CTRL_EN);
+
+        return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 Subdevice Pad Operations
+ */
+
+static int hsit_enum_mbus_code(struct v4l2_subdev *subdev,
+                               struct v4l2_subdev_fh *fh,
+                               struct v4l2_subdev_mbus_code_enum *code)
+{
+        struct vsp1_hsit *hsit = to_hsit(subdev);
+
+        if (code->index > 0)
+                return -EINVAL;
+
+        if ((code->pad == HSIT_PAD_SINK && !hsit->inverse) |
+            (code->pad == HSIT_PAD_SOURCE && hsit->inverse))
+                code->code = V4L2_MBUS_FMT_ARGB8888_1X32;
+        else
+                code->code = V4L2_MBUS_FMT_AHSV8888_1X32;
+
+        return 0;
+}
+
+static int hsit_enum_frame_size(struct v4l2_subdev *subdev,
+                                struct v4l2_subdev_fh *fh,
+                                struct v4l2_subdev_frame_size_enum *fse)
+{
+        struct v4l2_mbus_framefmt *format;
+
+        format = v4l2_subdev_get_try_format(fh, fse->pad);
+
+        if (fse->index || fse->code != format->code)
+                return -EINVAL;
+
+        if (fse->pad == HSIT_PAD_SINK) {
+                fse->min_width = HSIT_MIN_SIZE;
+                fse->max_width = HSIT_MAX_SIZE;
+                fse->min_height = HSIT_MIN_SIZE;
+                fse->max_height = HSIT_MAX_SIZE;
+        } else {
+                /* The size on the source pad are fixed and always identical to
+                 * the size on the sink pad.
+                 */
+                fse->min_width = format->width;
+                fse->max_width = format->width;
+                fse->min_height = format->height;
+                fse->max_height = format->height;
+        }
+
+        return 0;
+}
+
+static int hsit_get_format(struct v4l2_subdev *subdev,
+                           struct v4l2_subdev_fh *fh,
+                           struct v4l2_subdev_format *fmt)
+{
+        struct vsp1_hsit *hsit = to_hsit(subdev);
+
+        fmt->format = *vsp1_entity_get_pad_format(&hsit->entity, fh, fmt->pad,
+                                                  fmt->which);
+
+        return 0;
+}
+
+static int hsit_set_format(struct v4l2_subdev *subdev,
+                           struct v4l2_subdev_fh *fh,
+                           struct v4l2_subdev_format *fmt)
+{
+        struct vsp1_hsit *hsit = to_hsit(subdev);
+        struct v4l2_mbus_framefmt *format;
+
+        format = vsp1_entity_get_pad_format(&hsit->entity, fh, fmt->pad,
+                                            fmt->which);
+
+        if (fmt->pad == HSIT_PAD_SOURCE) {
+                /* The HST and HSI output format code and resolution can't be
+                 * modified.
+                 */
+                fmt->format = *format;
+                return 0;
+        }
+
+        format->code = hsit->inverse ? V4L2_MBUS_FMT_AHSV8888_1X32
+                     : V4L2_MBUS_FMT_ARGB8888_1X32;
+        format->width = clamp_t(unsigned int, fmt->format.width,
+                                HSIT_MIN_SIZE, HSIT_MAX_SIZE);
+        format->height = clamp_t(unsigned int, fmt->format.height,
+                                 HSIT_MIN_SIZE, HSIT_MAX_SIZE);
+        format->field = V4L2_FIELD_NONE;
+        format->colorspace = V4L2_COLORSPACE_SRGB;
+
+        fmt->format = *format;
+
+        /* Propagate the format to the source pad. */
+        format = vsp1_entity_get_pad_format(&hsit->entity, fh, HSIT_PAD_SOURCE,
+                                            fmt->which);
+        *format = fmt->format;
+        format->code = hsit->inverse ? V4L2_MBUS_FMT_ARGB8888_1X32
+                     : V4L2_MBUS_FMT_AHSV8888_1X32;
+
+        return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 Subdevice Operations
+ */
+
+static struct v4l2_subdev_video_ops hsit_video_ops = {
+        .s_stream = hsit_s_stream,
+};
+
+static struct v4l2_subdev_pad_ops hsit_pad_ops = {
+        .enum_mbus_code = hsit_enum_mbus_code,
+        .enum_frame_size = hsit_enum_frame_size,
+        .get_fmt = hsit_get_format,
+        .set_fmt = hsit_set_format,
+};
+
+static struct v4l2_subdev_ops hsit_ops = {
+        .video  = &hsit_video_ops,
+        .pad    = &hsit_pad_ops,
+};
+
+/* -----------------------------------------------------------------------------
+ * Initialization and Cleanup
+ */
+
+struct vsp1_hsit *vsp1_hsit_create(struct vsp1_device *vsp1, bool inverse)
+{
+        struct v4l2_subdev *subdev;
+        struct vsp1_hsit *hsit;
+        int ret;
+
+        hsit = devm_kzalloc(vsp1->dev, sizeof(*hsit), GFP_KERNEL);
+        if (hsit == NULL)
+                return ERR_PTR(-ENOMEM);
+
+        hsit->inverse = inverse;
+
+        if (inverse) {
+                hsit->entity.type = VSP1_ENTITY_HSI;
+                hsit->entity.id = VI6_DPR_NODE_HSI;
+        } else {
+                hsit->entity.type = VSP1_ENTITY_HST;
+                hsit->entity.id = VI6_DPR_NODE_HST;
+        }
+
+        ret = vsp1_entity_init(vsp1, &hsit->entity, 2);
+        if (ret < 0)
+                return ERR_PTR(ret);
+
+        /* Initialize the V4L2 subdev. */
+        subdev = &hsit->entity.subdev;
+        v4l2_subdev_init(subdev, &hsit_ops);
+
+        subdev->entity.ops = &vsp1_media_ops;
+        subdev->internal_ops = &vsp1_subdev_internal_ops;
+        snprintf(subdev->name, sizeof(subdev->name), "%s %s",
+                 dev_name(vsp1->dev), inverse ? "hsi" : "hst");
+        v4l2_set_subdevdata(subdev, hsit);
+        subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+
+        vsp1_entity_init_formats(subdev, NULL);
+
+        return hsit;
+}