--- /dev/null
+/*
+ * 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;
+}
projects / openwrt / staging / blogic.git / commitdiff