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