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1// SPDX-License-Identifier: GPL-2.0+2/*3 * vsp1_lif.c -- R-Car VSP1 LCD Controller Interface4 *5 * Copyright (C) 2013-2014 Renesas Electronics Corporation6 *7 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)8 */9 10#include <linux/device.h>11#include <linux/gfp.h>12 13#include <media/v4l2-subdev.h>14 15#include "vsp1.h"16#include "vsp1_dl.h"17#include "vsp1_lif.h"18 19#define LIF_MIN_SIZE 2U20#define LIF_MAX_SIZE 8190U21 22/* -----------------------------------------------------------------------------23 * Device Access24 */25 26static inline void vsp1_lif_write(struct vsp1_lif *lif,27 struct vsp1_dl_body *dlb, u32 reg, u32 data)28{29 vsp1_dl_body_write(dlb, reg + lif->entity.index * VI6_LIF_OFFSET,30 data);31}32 33/* -----------------------------------------------------------------------------34 * V4L2 Subdevice Operations35 */36 37static const unsigned int lif_codes[] = {38 MEDIA_BUS_FMT_ARGB8888_1X32,39 MEDIA_BUS_FMT_AYUV8_1X32,40};41 42static int lif_enum_mbus_code(struct v4l2_subdev *subdev,43 struct v4l2_subdev_state *sd_state,44 struct v4l2_subdev_mbus_code_enum *code)45{46 return vsp1_subdev_enum_mbus_code(subdev, sd_state, code, lif_codes,47 ARRAY_SIZE(lif_codes));48}49 50static int lif_enum_frame_size(struct v4l2_subdev *subdev,51 struct v4l2_subdev_state *sd_state,52 struct v4l2_subdev_frame_size_enum *fse)53{54 return vsp1_subdev_enum_frame_size(subdev, sd_state, fse,55 LIF_MIN_SIZE,56 LIF_MIN_SIZE, LIF_MAX_SIZE,57 LIF_MAX_SIZE);58}59 60static int lif_set_format(struct v4l2_subdev *subdev,61 struct v4l2_subdev_state *sd_state,62 struct v4l2_subdev_format *fmt)63{64 return vsp1_subdev_set_pad_format(subdev, sd_state, fmt, lif_codes,65 ARRAY_SIZE(lif_codes),66 LIF_MIN_SIZE, LIF_MIN_SIZE,67 LIF_MAX_SIZE, LIF_MAX_SIZE);68}69 70static const struct v4l2_subdev_pad_ops lif_pad_ops = {71 .enum_mbus_code = lif_enum_mbus_code,72 .enum_frame_size = lif_enum_frame_size,73 .get_fmt = vsp1_subdev_get_pad_format,74 .set_fmt = lif_set_format,75};76 77static const struct v4l2_subdev_ops lif_ops = {78 .pad = &lif_pad_ops,79};80 81/* -----------------------------------------------------------------------------82 * VSP1 Entity Operations83 */84 85static void lif_configure_stream(struct vsp1_entity *entity,86 struct v4l2_subdev_state *state,87 struct vsp1_pipeline *pipe,88 struct vsp1_dl_list *dl,89 struct vsp1_dl_body *dlb)90{91 const struct v4l2_mbus_framefmt *format;92 struct vsp1_lif *lif = to_lif(&entity->subdev);93 unsigned int hbth;94 unsigned int obth;95 unsigned int lbth;96 97 format = v4l2_subdev_state_get_format(state, LIF_PAD_SOURCE);98 99 switch (entity->vsp1->version & VI6_IP_VERSION_MODEL_MASK) {100 case VI6_IP_VERSION_MODEL_VSPD_GEN2:101 case VI6_IP_VERSION_MODEL_VSPD_V2H:102 hbth = 1536;103 obth = min(128U, (format->width + 1) / 2 * format->height - 4);104 lbth = 1520;105 break;106 107 case VI6_IP_VERSION_MODEL_VSPDL_GEN3:108 case VI6_IP_VERSION_MODEL_VSPD_V3:109 case VI6_IP_VERSION_MODEL_VSPD_RZG2L:110 hbth = 0;111 obth = 1500;112 lbth = 0;113 break;114 115 case VI6_IP_VERSION_MODEL_VSPD_GEN3:116 case VI6_IP_VERSION_MODEL_VSPD_GEN4:117 default:118 hbth = 0;119 obth = 3000;120 lbth = 0;121 break;122 }123 124 vsp1_lif_write(lif, dlb, VI6_LIF_CSBTH,125 (hbth << VI6_LIF_CSBTH_HBTH_SHIFT) |126 (lbth << VI6_LIF_CSBTH_LBTH_SHIFT));127 128 vsp1_lif_write(lif, dlb, VI6_LIF_CTRL,129 (obth << VI6_LIF_CTRL_OBTH_SHIFT) |130 (format->code == 0 ? VI6_LIF_CTRL_CFMT : 0) |131 VI6_LIF_CTRL_REQSEL | VI6_LIF_CTRL_LIF_EN);132 133 /*134 * On R-Car V3M and RZ/G2L the LIF0 buffer attribute register has to be135 * set to a non-default value to guarantee proper operation (otherwise136 * artifacts may appear on the output). The value required by the137 * manual is not explained but is likely a buffer size or threshold.138 */139 if (vsp1_feature(entity->vsp1, VSP1_HAS_NON_ZERO_LBA))140 vsp1_lif_write(lif, dlb, VI6_LIF_LBA,141 VI6_LIF_LBA_LBA0 |142 (1536 << VI6_LIF_LBA_LBA1_SHIFT));143}144 145static const struct vsp1_entity_operations lif_entity_ops = {146 .configure_stream = lif_configure_stream,147};148 149/* -----------------------------------------------------------------------------150 * Initialization and Cleanup151 */152 153struct vsp1_lif *vsp1_lif_create(struct vsp1_device *vsp1, unsigned int index)154{155 struct vsp1_lif *lif;156 int ret;157 158 lif = devm_kzalloc(vsp1->dev, sizeof(*lif), GFP_KERNEL);159 if (lif == NULL)160 return ERR_PTR(-ENOMEM);161 162 lif->entity.ops = &lif_entity_ops;163 lif->entity.type = VSP1_ENTITY_LIF;164 lif->entity.index = index;165 166 /*167 * The LIF is never exposed to userspace, but media entity registration168 * requires a function to be set. Use PROC_VIDEO_PIXEL_FORMATTER just to169 * avoid triggering a WARN_ON(), the value won't be seen anywhere.170 */171 ret = vsp1_entity_init(vsp1, &lif->entity, "lif", 2, &lif_ops,172 MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER);173 if (ret < 0)174 return ERR_PTR(ret);175 176 return lif;177}178