vsp1_hsit.c

  1// SPDX-License-Identifier: GPL-2.0+
  2/*
  3 * vsp1_hsit.c  --  R-Car VSP1 Hue Saturation value (Inverse) Transform
  4 *
  5 * Copyright (C) 2013 Renesas Corporation
  6 *
  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_entity.h"
 18#include "vsp1_hsit.h"
 19
 20#define HSIT_MIN_SIZE				4U
 21#define HSIT_MAX_SIZE				8190U
 22
 23/* -----------------------------------------------------------------------------
 24 * Device Access
 25 */
 26
 27static inline void vsp1_hsit_write(struct vsp1_hsit *hsit,
 28				   struct vsp1_dl_body *dlb, u32 reg, u32 data)
 29{
 30	vsp1_dl_body_write(dlb, reg, data);
 31}
 32
 33/* -----------------------------------------------------------------------------
 34 * V4L2 Subdevice Operations
 35 */
 36
 37static int hsit_enum_mbus_code(struct v4l2_subdev *subdev,
 38			       struct v4l2_subdev_state *sd_state,
 39			       struct v4l2_subdev_mbus_code_enum *code)
 40{
 41	struct vsp1_hsit *hsit = to_hsit(subdev);
 42
 43	if (code->index > 0)
 44		return -EINVAL;
 45
 46	if ((code->pad == HSIT_PAD_SINK && !hsit->inverse) |
 47	    (code->pad == HSIT_PAD_SOURCE && hsit->inverse))
 48		code->code = MEDIA_BUS_FMT_ARGB8888_1X32;
 49	else
 50		code->code = MEDIA_BUS_FMT_AHSV8888_1X32;
 51
 52	return 0;
 53}
 54
 55static int hsit_enum_frame_size(struct v4l2_subdev *subdev,
 56				struct v4l2_subdev_state *sd_state,
 57				struct v4l2_subdev_frame_size_enum *fse)
 58{
 59	return vsp1_subdev_enum_frame_size(subdev, sd_state, fse,
 60					   HSIT_MIN_SIZE,
 61					   HSIT_MIN_SIZE, HSIT_MAX_SIZE,
 62					   HSIT_MAX_SIZE);
 63}
 64
 65static int hsit_set_format(struct v4l2_subdev *subdev,
 66			   struct v4l2_subdev_state *sd_state,
 67			   struct v4l2_subdev_format *fmt)
 68{
 69	struct vsp1_hsit *hsit = to_hsit(subdev);
 70	struct v4l2_subdev_state *state;
 71	struct v4l2_mbus_framefmt *format;
 72	int ret = 0;
 73
 74	mutex_lock(&hsit->entity.lock);
 75
 76	state = vsp1_entity_get_state(&hsit->entity, sd_state, fmt->which);
 77	if (!state) {
 78		ret = -EINVAL;
 79		goto done;
 80	}
 81
 82	format = v4l2_subdev_state_get_format(state, fmt->pad);
 83
 84	if (fmt->pad == HSIT_PAD_SOURCE) {
 85		/*
 86		 * The HST and HSI output format code and resolution can't be
 87		 * modified.
 88		 */
 89		fmt->format = *format;
 90		goto done;
 91	}
 92
 93	format->code = hsit->inverse ? MEDIA_BUS_FMT_AHSV8888_1X32
 94		     : MEDIA_BUS_FMT_ARGB8888_1X32;
 95	format->width = clamp_t(unsigned int, fmt->format.width,
 96				HSIT_MIN_SIZE, HSIT_MAX_SIZE);
 97	format->height = clamp_t(unsigned int, fmt->format.height,
 98				 HSIT_MIN_SIZE, HSIT_MAX_SIZE);
 99	format->field = V4L2_FIELD_NONE;
100
101	format->colorspace = fmt->format.colorspace;
102	format->xfer_func = fmt->format.xfer_func;
103	format->ycbcr_enc = fmt->format.ycbcr_enc;
104	format->quantization = fmt->format.quantization;
105
106	vsp1_entity_adjust_color_space(format);
107
108	fmt->format = *format;
109
110	/* Propagate the format to the source pad. */
111	format = v4l2_subdev_state_get_format(state, HSIT_PAD_SOURCE);
112	*format = fmt->format;
113	format->code = hsit->inverse ? MEDIA_BUS_FMT_ARGB8888_1X32
114		     : MEDIA_BUS_FMT_AHSV8888_1X32;
115
116	vsp1_entity_adjust_color_space(format);
117
118done:
119	mutex_unlock(&hsit->entity.lock);
120	return ret;
121}
122
123static const struct v4l2_subdev_pad_ops hsit_pad_ops = {
124	.enum_mbus_code = hsit_enum_mbus_code,
125	.enum_frame_size = hsit_enum_frame_size,
126	.get_fmt = vsp1_subdev_get_pad_format,
127	.set_fmt = hsit_set_format,
128};
129
130static const struct v4l2_subdev_ops hsit_ops = {
131	.pad    = &hsit_pad_ops,
132};
133
134/* -----------------------------------------------------------------------------
135 * VSP1 Entity Operations
136 */
137
138static void hsit_configure_stream(struct vsp1_entity *entity,
139				  struct v4l2_subdev_state *state,
140				  struct vsp1_pipeline *pipe,
141				  struct vsp1_dl_list *dl,
142				  struct vsp1_dl_body *dlb)
143{
144	struct vsp1_hsit *hsit = to_hsit(&entity->subdev);
145
146	if (hsit->inverse)
147		vsp1_hsit_write(hsit, dlb, VI6_HSI_CTRL, VI6_HSI_CTRL_EN);
148	else
149		vsp1_hsit_write(hsit, dlb, VI6_HST_CTRL, VI6_HST_CTRL_EN);
150}
151
152static const struct vsp1_entity_operations hsit_entity_ops = {
153	.configure_stream = hsit_configure_stream,
154};
155
156/* -----------------------------------------------------------------------------
157 * Initialization and Cleanup
158 */
159
160struct vsp1_hsit *vsp1_hsit_create(struct vsp1_device *vsp1, bool inverse)
161{
162	struct vsp1_hsit *hsit;
163	int ret;
164
165	hsit = devm_kzalloc(vsp1->dev, sizeof(*hsit), GFP_KERNEL);
166	if (hsit == NULL)
167		return ERR_PTR(-ENOMEM);
168
169	hsit->inverse = inverse;
170
171	hsit->entity.ops = &hsit_entity_ops;
172
173	if (inverse)
174		hsit->entity.type = VSP1_ENTITY_HSI;
175	else
176		hsit->entity.type = VSP1_ENTITY_HST;
177
178	ret = vsp1_entity_init(vsp1, &hsit->entity, inverse ? "hsi" : "hst",
179			       2, &hsit_ops,
180			       MEDIA_ENT_F_PROC_VIDEO_PIXEL_ENC_CONV);
181	if (ret < 0)
182		return ERR_PTR(ret);
183
184	return hsit;
185}