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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 | // 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_state *sd_state, struct v4l2_subdev_mbus_code_enum *code) { return vsp1_subdev_enum_mbus_code(subdev, sd_state, code, lif_codes, ARRAY_SIZE(lif_codes)); } static int lif_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, LIF_MIN_SIZE, LIF_MIN_SIZE, LIF_MAX_SIZE, LIF_MAX_SIZE); } static int lif_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, 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: case VI6_IP_VERSION_MODEL_VSPD_RZG2L: 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 and RZ/G2L 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 (vsp1_feature(entity->vsp1, VSP1_HAS_NON_ZERO_LBA)) 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; } |