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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/media/platform/renesas/vsp1/vsp1_lut.c
parentInitial commit. (diff)
downloadlinux-upstream.tar.xz
linux-upstream.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/media/platform/renesas/vsp1/vsp1_lut.c')
-rw-r--r--drivers/media/platform/renesas/vsp1/vsp1_lut.c242
1 files changed, 242 insertions, 0 deletions
diff --git a/drivers/media/platform/renesas/vsp1/vsp1_lut.c b/drivers/media/platform/renesas/vsp1/vsp1_lut.c
new file mode 100644
index 000000000..ac6802a32
--- /dev/null
+++ b/drivers/media/platform/renesas/vsp1/vsp1_lut.c
@@ -0,0 +1,242 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * vsp1_lut.c -- R-Car VSP1 Look-Up Table
+ *
+ * Copyright (C) 2013 Renesas Corporation
+ *
+ * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ */
+
+#include <linux/device.h>
+#include <linux/gfp.h>
+
+#include <media/v4l2-subdev.h>
+
+#include "vsp1.h"
+#include "vsp1_dl.h"
+#include "vsp1_lut.h"
+
+#define LUT_MIN_SIZE 4U
+#define LUT_MAX_SIZE 8190U
+
+#define LUT_SIZE 256
+
+/* -----------------------------------------------------------------------------
+ * Device Access
+ */
+
+static inline void vsp1_lut_write(struct vsp1_lut *lut,
+ struct vsp1_dl_body *dlb, u32 reg, u32 data)
+{
+ vsp1_dl_body_write(dlb, reg, data);
+}
+
+/* -----------------------------------------------------------------------------
+ * Controls
+ */
+
+#define V4L2_CID_VSP1_LUT_TABLE (V4L2_CID_USER_BASE | 0x1001)
+
+static int lut_set_table(struct vsp1_lut *lut, struct v4l2_ctrl *ctrl)
+{
+ struct vsp1_dl_body *dlb;
+ unsigned int i;
+
+ dlb = vsp1_dl_body_get(lut->pool);
+ if (!dlb)
+ return -ENOMEM;
+
+ for (i = 0; i < LUT_SIZE; ++i)
+ vsp1_dl_body_write(dlb, VI6_LUT_TABLE + 4 * i,
+ ctrl->p_new.p_u32[i]);
+
+ spin_lock_irq(&lut->lock);
+ swap(lut->lut, dlb);
+ spin_unlock_irq(&lut->lock);
+
+ vsp1_dl_body_put(dlb);
+ return 0;
+}
+
+static int lut_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct vsp1_lut *lut =
+ container_of(ctrl->handler, struct vsp1_lut, ctrls);
+
+ switch (ctrl->id) {
+ case V4L2_CID_VSP1_LUT_TABLE:
+ lut_set_table(lut, ctrl);
+ break;
+ }
+
+ return 0;
+}
+
+static const struct v4l2_ctrl_ops lut_ctrl_ops = {
+ .s_ctrl = lut_s_ctrl,
+};
+
+static const struct v4l2_ctrl_config lut_table_control = {
+ .ops = &lut_ctrl_ops,
+ .id = V4L2_CID_VSP1_LUT_TABLE,
+ .name = "Look-Up Table",
+ .type = V4L2_CTRL_TYPE_U32,
+ .min = 0x00000000,
+ .max = 0x00ffffff,
+ .step = 1,
+ .def = 0,
+ .dims = { LUT_SIZE },
+};
+
+/* -----------------------------------------------------------------------------
+ * V4L2 Subdevice Pad Operations
+ */
+
+static const unsigned int lut_codes[] = {
+ MEDIA_BUS_FMT_ARGB8888_1X32,
+ MEDIA_BUS_FMT_AHSV8888_1X32,
+ MEDIA_BUS_FMT_AYUV8_1X32,
+};
+
+static int lut_enum_mbus_code(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ return vsp1_subdev_enum_mbus_code(subdev, sd_state, code, lut_codes,
+ ARRAY_SIZE(lut_codes));
+}
+
+static int lut_enum_frame_size(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ return vsp1_subdev_enum_frame_size(subdev, sd_state, fse,
+ LUT_MIN_SIZE,
+ LUT_MIN_SIZE, LUT_MAX_SIZE,
+ LUT_MAX_SIZE);
+}
+
+static int lut_set_format(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_format *fmt)
+{
+ return vsp1_subdev_set_pad_format(subdev, sd_state, fmt, lut_codes,
+ ARRAY_SIZE(lut_codes),
+ LUT_MIN_SIZE, LUT_MIN_SIZE,
+ LUT_MAX_SIZE, LUT_MAX_SIZE);
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 Subdevice Operations
+ */
+
+static const struct v4l2_subdev_pad_ops lut_pad_ops = {
+ .init_cfg = vsp1_entity_init_cfg,
+ .enum_mbus_code = lut_enum_mbus_code,
+ .enum_frame_size = lut_enum_frame_size,
+ .get_fmt = vsp1_subdev_get_pad_format,
+ .set_fmt = lut_set_format,
+};
+
+static const struct v4l2_subdev_ops lut_ops = {
+ .pad = &lut_pad_ops,
+};
+
+/* -----------------------------------------------------------------------------
+ * VSP1 Entity Operations
+ */
+
+static void lut_configure_stream(struct vsp1_entity *entity,
+ struct vsp1_pipeline *pipe,
+ struct vsp1_dl_list *dl,
+ struct vsp1_dl_body *dlb)
+{
+ struct vsp1_lut *lut = to_lut(&entity->subdev);
+
+ vsp1_lut_write(lut, dlb, VI6_LUT_CTRL, VI6_LUT_CTRL_EN);
+}
+
+static void lut_configure_frame(struct vsp1_entity *entity,
+ struct vsp1_pipeline *pipe,
+ struct vsp1_dl_list *dl,
+ struct vsp1_dl_body *dlb)
+{
+ struct vsp1_lut *lut = to_lut(&entity->subdev);
+ struct vsp1_dl_body *lut_dlb;
+ unsigned long flags;
+
+ spin_lock_irqsave(&lut->lock, flags);
+ lut_dlb = lut->lut;
+ lut->lut = NULL;
+ spin_unlock_irqrestore(&lut->lock, flags);
+
+ if (lut_dlb) {
+ vsp1_dl_list_add_body(dl, lut_dlb);
+
+ /* Release our local reference. */
+ vsp1_dl_body_put(lut_dlb);
+ }
+}
+
+static void lut_destroy(struct vsp1_entity *entity)
+{
+ struct vsp1_lut *lut = to_lut(&entity->subdev);
+
+ vsp1_dl_body_pool_destroy(lut->pool);
+}
+
+static const struct vsp1_entity_operations lut_entity_ops = {
+ .configure_stream = lut_configure_stream,
+ .configure_frame = lut_configure_frame,
+ .destroy = lut_destroy,
+};
+
+/* -----------------------------------------------------------------------------
+ * Initialization and Cleanup
+ */
+
+struct vsp1_lut *vsp1_lut_create(struct vsp1_device *vsp1)
+{
+ struct vsp1_lut *lut;
+ int ret;
+
+ lut = devm_kzalloc(vsp1->dev, sizeof(*lut), GFP_KERNEL);
+ if (lut == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ spin_lock_init(&lut->lock);
+
+ lut->entity.ops = &lut_entity_ops;
+ lut->entity.type = VSP1_ENTITY_LUT;
+
+ ret = vsp1_entity_init(vsp1, &lut->entity, "lut", 2, &lut_ops,
+ MEDIA_ENT_F_PROC_VIDEO_LUT);
+ if (ret < 0)
+ return ERR_PTR(ret);
+
+ /*
+ * Pre-allocate a body pool, with 3 bodies allowing a userspace update
+ * before the hardware has committed a previous set of tables, handling
+ * both the queued and pending dl entries.
+ */
+ lut->pool = vsp1_dl_body_pool_create(vsp1, 3, LUT_SIZE, 0);
+ if (!lut->pool)
+ return ERR_PTR(-ENOMEM);
+
+ /* Initialize the control handler. */
+ v4l2_ctrl_handler_init(&lut->ctrls, 1);
+ v4l2_ctrl_new_custom(&lut->ctrls, &lut_table_control, NULL);
+
+ lut->entity.subdev.ctrl_handler = &lut->ctrls;
+
+ if (lut->ctrls.error) {
+ dev_err(vsp1->dev, "lut: failed to initialize controls\n");
+ ret = lut->ctrls.error;
+ vsp1_entity_destroy(&lut->entity);
+ return ERR_PTR(ret);
+ }
+
+ v4l2_ctrl_handler_setup(&lut->ctrls);
+
+ return lut;
+}