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177 lines
4.8 KiB
177 lines
4.8 KiB
// 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 ([email protected]) |
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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_state *sd_state, |
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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, sd_state, 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_state *sd_state, |
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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, sd_state, fse, |
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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_state *sd_state, |
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struct v4l2_subdev_format *fmt) |
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{ |
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return vsp1_subdev_set_pad_format(subdev, sd_state, 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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