1 files changed, 292 insertions, 0 deletions

diff --git a/drivers/media/platform/vsp1/vsp1_clu.c b/drivers/media/platform/vsp1/vsp1_clu.c
new file mode 100644
index 000000000000..b63d2dbe5ea3
--- /dev/null
+++ b/drivers/media/platform/vsp1/vsp1_clu.c
@@ -0,0 +1,292 @@
+/*
+ * vsp1_clu.c  --  R-Car VSP1 Cubic Look-Up Table
+ *
+ * Copyright (C) 2015-2016 Renesas Electronics 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/slab.h>
+
+#include <media/v4l2-subdev.h>
+
+#include "vsp1.h"
+#include "vsp1_clu.h"
+#include "vsp1_dl.h"
+
+#define CLU_MIN_SIZE                            4U
+#define CLU_MAX_SIZE                            8190U
+
+/* -----------------------------------------------------------------------------
+ * Device Access
+ */
+
+static inline void vsp1_clu_write(struct vsp1_clu *clu, struct vsp1_dl_list *dl,
+                                  u32 reg, u32 data)
+{
+        vsp1_dl_list_write(dl, reg, data);
+}
+
+/* -----------------------------------------------------------------------------
+ * Controls
+ */
+
+#define V4L2_CID_VSP1_CLU_TABLE                 (V4L2_CID_USER_BASE | 0x1001)
+#define V4L2_CID_VSP1_CLU_MODE                  (V4L2_CID_USER_BASE | 0x1002)
+#define V4L2_CID_VSP1_CLU_MODE_2D               0
+#define V4L2_CID_VSP1_CLU_MODE_3D               1
+
+static int clu_set_table(struct vsp1_clu *clu, struct v4l2_ctrl *ctrl)
+{
+        struct vsp1_dl_body *dlb;
+        unsigned int i;
+
+        dlb = vsp1_dl_fragment_alloc(clu->entity.vsp1, 1 + 17 * 17 * 17);
+        if (!dlb)
+                return -ENOMEM;
+
+        vsp1_dl_fragment_write(dlb, VI6_CLU_ADDR, 0);
+        for (i = 0; i < 17 * 17 * 17; ++i)
+                vsp1_dl_fragment_write(dlb, VI6_CLU_DATA, ctrl->p_new.p_u32[i]);
+
+        spin_lock_irq(&clu->lock);
+        swap(clu->clu, dlb);
+        spin_unlock_irq(&clu->lock);
+
+        vsp1_dl_fragment_free(dlb);
+        return 0;
+}
+
+static int clu_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+        struct vsp1_clu *clu =
+                container_of(ctrl->handler, struct vsp1_clu, ctrls);
+
+        switch (ctrl->id) {
+        case V4L2_CID_VSP1_CLU_TABLE:
+                clu_set_table(clu, ctrl);
+                break;
+
+        case V4L2_CID_VSP1_CLU_MODE:
+                clu->mode = ctrl->val;
+                break;
+        }
+
+        return 0;
+}
+
+static const struct v4l2_ctrl_ops clu_ctrl_ops = {
+        .s_ctrl = clu_s_ctrl,
+};
+
+static const struct v4l2_ctrl_config clu_table_control = {
+        .ops = &clu_ctrl_ops,
+        .id = V4L2_CID_VSP1_CLU_TABLE,
+        .name = "Look-Up Table",
+        .type = V4L2_CTRL_TYPE_U32,
+        .min = 0x00000000,
+        .max = 0x00ffffff,
+        .step = 1,
+        .def = 0,
+        .dims = { 17, 17, 17 },
+};
+
+static const char * const clu_mode_menu[] = {
+        "2D",
+        "3D",
+        NULL,
+};
+
+static const struct v4l2_ctrl_config clu_mode_control = {
+        .ops = &clu_ctrl_ops,
+        .id = V4L2_CID_VSP1_CLU_MODE,
+        .name = "Mode",
+        .type = V4L2_CTRL_TYPE_MENU,
+        .min = 0,
+        .max = 1,
+        .def = 1,
+        .qmenu = clu_mode_menu,
+};
+
+/* -----------------------------------------------------------------------------
+ * V4L2 Subdevice Pad Operations
+ */
+
+static int clu_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_ARGB8888_1X32,
+                MEDIA_BUS_FMT_AHSV8888_1X32,
+                MEDIA_BUS_FMT_AYUV8_1X32,
+        };
+
+        return vsp1_subdev_enum_mbus_code(subdev, cfg, code, codes,
+                                          ARRAY_SIZE(codes));
+}
+
+static int clu_enum_frame_size(struct v4l2_subdev *subdev,
+                               struct v4l2_subdev_pad_config *cfg,
+                               struct v4l2_subdev_frame_size_enum *fse)
+{
+        return vsp1_subdev_enum_frame_size(subdev, cfg, fse, CLU_MIN_SIZE,
+                                           CLU_MIN_SIZE, CLU_MAX_SIZE,
+                                           CLU_MAX_SIZE);
+}
+
+static int clu_set_format(struct v4l2_subdev *subdev,
+                          struct v4l2_subdev_pad_config *cfg,
+                          struct v4l2_subdev_format *fmt)
+{
+        struct vsp1_clu *clu = to_clu(subdev);
+        struct v4l2_subdev_pad_config *config;
+        struct v4l2_mbus_framefmt *format;
+
+        config = vsp1_entity_get_pad_config(&clu->entity, cfg, fmt->which);
+        if (!config)
+                return -EINVAL;
+
+        /* Default to YUV if the requested format is not supported. */
+        if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
+            fmt->format.code != MEDIA_BUS_FMT_AHSV8888_1X32 &&
+            fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
+                fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
+
+        format = vsp1_entity_get_pad_format(&clu->entity, config, fmt->pad);
+
+        if (fmt->pad == CLU_PAD_SOURCE) {
+                /* The CLU output format can't be modified. */
+                fmt->format = *format;
+                return 0;
+        }
+
+        format->code = fmt->format.code;
+        format->width = clamp_t(unsigned int, fmt->format.width,
+                                CLU_MIN_SIZE, CLU_MAX_SIZE);
+        format->height = clamp_t(unsigned int, fmt->format.height,
+                                 CLU_MIN_SIZE, CLU_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(&clu->entity, config,
+                                            CLU_PAD_SOURCE);
+        *format = fmt->format;
+
+        return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 Subdevice Operations
+ */
+
+static const struct v4l2_subdev_pad_ops clu_pad_ops = {
+        .init_cfg = vsp1_entity_init_cfg,
+        .enum_mbus_code = clu_enum_mbus_code,
+        .enum_frame_size = clu_enum_frame_size,
+        .get_fmt = vsp1_subdev_get_pad_format,
+        .set_fmt = clu_set_format,
+};
+
+static const struct v4l2_subdev_ops clu_ops = {
+        .pad    = &clu_pad_ops,
+};
+
+/* -----------------------------------------------------------------------------
+ * VSP1 Entity Operations
+ */
+
+static void clu_configure(struct vsp1_entity *entity,
+                          struct vsp1_pipeline *pipe,
+                          struct vsp1_dl_list *dl, bool full)
+{
+        struct vsp1_clu *clu = to_clu(&entity->subdev);
+        struct vsp1_dl_body *dlb;
+        unsigned long flags;
+        u32 ctrl = VI6_CLU_CTRL_AAI | VI6_CLU_CTRL_MVS | VI6_CLU_CTRL_EN;
+
+        /* The format can't be changed during streaming, only verify it at
+         * stream start and store the information internally for future partial
+         * reconfiguration calls.
+         */
+        if (full) {
+                struct v4l2_mbus_framefmt *format;
+
+                format = vsp1_entity_get_pad_format(&clu->entity,
+                                                    clu->entity.config,
+                                                    CLU_PAD_SINK);
+                clu->yuv_mode = format->code == MEDIA_BUS_FMT_AYUV8_1X32;
+                return;
+        }
+
+        /* 2D mode can only be used with the YCbCr pixel encoding. */
+        if (clu->mode == V4L2_CID_VSP1_CLU_MODE_2D && clu->yuv_mode)
+                ctrl |= VI6_CLU_CTRL_AX1I_2D | VI6_CLU_CTRL_AX2I_2D
+                     |  VI6_CLU_CTRL_OS0_2D | VI6_CLU_CTRL_OS1_2D
+                     |  VI6_CLU_CTRL_OS2_2D | VI6_CLU_CTRL_M2D;
+
+        vsp1_clu_write(clu, dl, VI6_CLU_CTRL, ctrl);
+
+        spin_lock_irqsave(&clu->lock, flags);
+        dlb = clu->clu;
+        clu->clu = NULL;
+        spin_unlock_irqrestore(&clu->lock, flags);
+
+        if (dlb)
+                vsp1_dl_list_add_fragment(dl, dlb);
+}
+
+static const struct vsp1_entity_operations clu_entity_ops = {
+        .configure = clu_configure,
+};
+
+/* -----------------------------------------------------------------------------
+ * Initialization and Cleanup
+ */
+
+struct vsp1_clu *vsp1_clu_create(struct vsp1_device *vsp1)
+{
+        struct vsp1_clu *clu;
+        int ret;
+
+        clu = devm_kzalloc(vsp1->dev, sizeof(*clu), GFP_KERNEL);
+        if (clu == NULL)
+                return ERR_PTR(-ENOMEM);
+
+        spin_lock_init(&clu->lock);
+
+        clu->entity.ops = &clu_entity_ops;
+        clu->entity.type = VSP1_ENTITY_CLU;
+
+        ret = vsp1_entity_init(vsp1, &clu->entity, "clu", 2, &clu_ops,
+                               MEDIA_ENT_F_PROC_VIDEO_LUT);
+        if (ret < 0)
+                return ERR_PTR(ret);
+
+        /* Initialize the control handler. */
+        v4l2_ctrl_handler_init(&clu->ctrls, 2);
+        v4l2_ctrl_new_custom(&clu->ctrls, &clu_table_control, NULL);
+        v4l2_ctrl_new_custom(&clu->ctrls, &clu_mode_control, NULL);
+
+        clu->entity.subdev.ctrl_handler = &clu->ctrls;
+
+        if (clu->ctrls.error) {
+                dev_err(vsp1->dev, "clu: failed to initialize controls\n");
+                ret = clu->ctrls.error;
+                vsp1_entity_destroy(&clu->entity);
+                return ERR_PTR(ret);
+        }
+
+        v4l2_ctrl_handler_setup(&clu->ctrls);
+
+        return clu;
+}