// SPDX-License-Identifier: GPL-2.0+
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/*
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* vsp1_lif.c -- R-Car VSP1 LCD Controller Interface
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*
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* Copyright (C) 2013-2014 Renesas Electronics Corporation
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*
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* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*/
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#include <linux/device.h>
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#include <linux/gfp.h>
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#include <media/v4l2-subdev.h>
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#include "vsp1.h"
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#include "vsp1_dl.h"
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#include "vsp1_lif.h"
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#define LIF_MIN_SIZE 2U
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#define LIF_MAX_SIZE 8190U
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/* -----------------------------------------------------------------------------
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* Device Access
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*/
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static inline void vsp1_lif_write(struct vsp1_lif *lif,
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struct vsp1_dl_body *dlb, u32 reg, u32 data)
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{
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vsp1_dl_body_write(dlb, reg + lif->entity.index * VI6_LIF_OFFSET,
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data);
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}
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/* -----------------------------------------------------------------------------
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* V4L2 Subdevice Operations
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*/
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static const unsigned int lif_codes[] = {
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MEDIA_BUS_FMT_ARGB8888_1X32,
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MEDIA_BUS_FMT_AYUV8_1X32,
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};
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static int lif_enum_mbus_code(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_mbus_code_enum *code)
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{
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return vsp1_subdev_enum_mbus_code(subdev, cfg, code, lif_codes,
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ARRAY_SIZE(lif_codes));
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}
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static int lif_enum_frame_size(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_frame_size_enum *fse)
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{
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return vsp1_subdev_enum_frame_size(subdev, cfg, fse, LIF_MIN_SIZE,
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LIF_MIN_SIZE, LIF_MAX_SIZE,
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LIF_MAX_SIZE);
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}
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static int lif_set_format(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_format *fmt)
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{
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return vsp1_subdev_set_pad_format(subdev, cfg, fmt, lif_codes,
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ARRAY_SIZE(lif_codes),
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LIF_MIN_SIZE, LIF_MIN_SIZE,
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LIF_MAX_SIZE, LIF_MAX_SIZE);
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}
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static const struct v4l2_subdev_pad_ops lif_pad_ops = {
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.init_cfg = vsp1_entity_init_cfg,
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.enum_mbus_code = lif_enum_mbus_code,
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.enum_frame_size = lif_enum_frame_size,
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.get_fmt = vsp1_subdev_get_pad_format,
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.set_fmt = lif_set_format,
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};
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static const struct v4l2_subdev_ops lif_ops = {
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.pad = &lif_pad_ops,
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};
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/* -----------------------------------------------------------------------------
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* VSP1 Entity Operations
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*/
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static void lif_configure_stream(struct vsp1_entity *entity,
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struct vsp1_pipeline *pipe,
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struct vsp1_dl_list *dl,
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struct vsp1_dl_body *dlb)
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{
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const struct v4l2_mbus_framefmt *format;
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struct vsp1_lif *lif = to_lif(&entity->subdev);
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unsigned int hbth;
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unsigned int obth;
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unsigned int lbth;
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format = vsp1_entity_get_pad_format(&lif->entity, lif->entity.config,
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LIF_PAD_SOURCE);
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switch (entity->vsp1->version & VI6_IP_VERSION_MODEL_MASK) {
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case VI6_IP_VERSION_MODEL_VSPD_GEN2:
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case VI6_IP_VERSION_MODEL_VSPD_V2H:
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hbth = 1536;
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obth = min(128U, (format->width + 1) / 2 * format->height - 4);
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lbth = 1520;
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break;
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case VI6_IP_VERSION_MODEL_VSPDL_GEN3:
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case VI6_IP_VERSION_MODEL_VSPD_V3:
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hbth = 0;
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obth = 1500;
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lbth = 0;
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break;
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case VI6_IP_VERSION_MODEL_VSPD_GEN3:
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default:
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hbth = 0;
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obth = 3000;
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lbth = 0;
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break;
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}
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vsp1_lif_write(lif, dlb, VI6_LIF_CSBTH,
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(hbth << VI6_LIF_CSBTH_HBTH_SHIFT) |
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(lbth << VI6_LIF_CSBTH_LBTH_SHIFT));
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vsp1_lif_write(lif, dlb, VI6_LIF_CTRL,
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(obth << VI6_LIF_CTRL_OBTH_SHIFT) |
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(format->code == 0 ? VI6_LIF_CTRL_CFMT : 0) |
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VI6_LIF_CTRL_REQSEL | VI6_LIF_CTRL_LIF_EN);
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/*
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* On R-Car V3M the LIF0 buffer attribute register has to be set to a
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* non-default value to guarantee proper operation (otherwise artifacts
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* may appear on the output). The value required by the manual is not
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* explained but is likely a buffer size or threshold.
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*/
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if ((entity->vsp1->version & VI6_IP_VERSION_MASK) ==
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(VI6_IP_VERSION_MODEL_VSPD_V3 | VI6_IP_VERSION_SOC_V3M))
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vsp1_lif_write(lif, dlb, VI6_LIF_LBA,
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VI6_LIF_LBA_LBA0 |
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(1536 << VI6_LIF_LBA_LBA1_SHIFT));
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}
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static const struct vsp1_entity_operations lif_entity_ops = {
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.configure_stream = lif_configure_stream,
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};
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/* -----------------------------------------------------------------------------
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* Initialization and Cleanup
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*/
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struct vsp1_lif *vsp1_lif_create(struct vsp1_device *vsp1, unsigned int index)
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{
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struct vsp1_lif *lif;
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int ret;
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lif = devm_kzalloc(vsp1->dev, sizeof(*lif), GFP_KERNEL);
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if (lif == NULL)
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return ERR_PTR(-ENOMEM);
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lif->entity.ops = &lif_entity_ops;
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lif->entity.type = VSP1_ENTITY_LIF;
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lif->entity.index = index;
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/*
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* The LIF is never exposed to userspace, but media entity registration
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* requires a function to be set. Use PROC_VIDEO_PIXEL_FORMATTER just to
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* avoid triggering a WARN_ON(), the value won't be seen anywhere.
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*/
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ret = vsp1_entity_init(vsp1, &lif->entity, "lif", 2, &lif_ops,
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MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER);
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if (ret < 0)
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return ERR_PTR(ret);
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return lif;
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}
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