1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 *  cx18 ioctl control functions
4 *
5 *  Derived from ivtv-controls.c
6 *
7 *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
8 */
9#include <linux/kernel.h>
10#include <linux/slab.h>
11
12#include "cx18-driver.h"
13#include "cx18-cards.h"
14#include "cx18-ioctl.h"
15#include "cx18-audio.h"
16#include "cx18-mailbox.h"
17#include "cx18-controls.h"
18
19static int cx18_s_stream_vbi_fmt(struct cx2341x_handler *cxhdl, u32 fmt)
20{
21	struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl);
22	int type = cxhdl->stream_type->val;
23
24	if (atomic_read(&cx->ana_capturing) > 0)
25		return -EBUSY;
26
27	if (fmt != V4L2_MPEG_STREAM_VBI_FMT_IVTV ||
28	    !(type == V4L2_MPEG_STREAM_TYPE_MPEG2_PS ||
29	      type == V4L2_MPEG_STREAM_TYPE_MPEG2_DVD ||
30	      type == V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD)) {
31		/* Only IVTV fmt VBI insertion & only MPEG-2 PS type streams */
32		cx->vbi.insert_mpeg = V4L2_MPEG_STREAM_VBI_FMT_NONE;
33		CX18_DEBUG_INFO("disabled insertion of sliced VBI data into the MPEG stream\n");
34		return 0;
35	}
36
37	/* Allocate sliced VBI buffers if needed. */
38	if (cx->vbi.sliced_mpeg_data[0] == NULL) {
39		int i;
40
41		for (i = 0; i < CX18_VBI_FRAMES; i++) {
42			cx->vbi.sliced_mpeg_data[i] =
43			       kmalloc(CX18_SLICED_MPEG_DATA_BUFSZ, GFP_KERNEL);
44			if (cx->vbi.sliced_mpeg_data[i] == NULL) {
45				while (--i >= 0) {
46					kfree(cx->vbi.sliced_mpeg_data[i]);
47					cx->vbi.sliced_mpeg_data[i] = NULL;
48				}
49				cx->vbi.insert_mpeg =
50						  V4L2_MPEG_STREAM_VBI_FMT_NONE;
51				CX18_WARN("Unable to allocate buffers for sliced VBI data insertion\n");
52				return -ENOMEM;
53			}
54		}
55	}
56
57	cx->vbi.insert_mpeg = fmt;
58	CX18_DEBUG_INFO("enabled insertion of sliced VBI data into the MPEG PS,when sliced VBI is enabled\n");
59
60	/*
61	 * If our current settings have no lines set for capture, store a valid,
62	 * default set of service lines to capture, in our current settings.
63	 */
64	if (cx18_get_service_set(cx->vbi.sliced_in) == 0) {
65		if (cx->is_60hz)
66			cx->vbi.sliced_in->service_set =
67							V4L2_SLICED_CAPTION_525;
68		else
69			cx->vbi.sliced_in->service_set = V4L2_SLICED_WSS_625;
70		cx18_expand_service_set(cx->vbi.sliced_in, cx->is_50hz);
71	}
72	return 0;
73}
74
75static int cx18_s_video_encoding(struct cx2341x_handler *cxhdl, u32 val)
76{
77	struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl);
78	int is_mpeg1 = val == V4L2_MPEG_VIDEO_ENCODING_MPEG_1;
79	struct v4l2_subdev_format format = {
80		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
81	};
82	struct v4l2_mbus_framefmt *fmt = &format.format;
83
84	/* fix videodecoder resolution */
85	fmt->width = cxhdl->width / (is_mpeg1 ? 2 : 1);
86	fmt->height = cxhdl->height;
87	fmt->code = MEDIA_BUS_FMT_FIXED;
88	v4l2_subdev_call(cx->sd_av, pad, set_fmt, NULL, &format);
89	return 0;
90}
91
92static int cx18_s_audio_sampling_freq(struct cx2341x_handler *cxhdl, u32 idx)
93{
94	static const u32 freqs[3] = { 44100, 48000, 32000 };
95	struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl);
96
97	/* The audio clock of the digitizer must match the codec sample
98	   rate otherwise you get some very strange effects. */
99	if (idx < ARRAY_SIZE(freqs))
100		cx18_call_all(cx, audio, s_clock_freq, freqs[idx]);
101	return 0;
102}
103
104static int cx18_s_audio_mode(struct cx2341x_handler *cxhdl, u32 val)
105{
106	struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl);
107
108	cx->dualwatch_stereo_mode = val;
109	return 0;
110}
111
112const struct cx2341x_handler_ops cx18_cxhdl_ops = {
113	.s_audio_mode = cx18_s_audio_mode,
114	.s_audio_sampling_freq = cx18_s_audio_sampling_freq,
115	.s_video_encoding = cx18_s_video_encoding,
116	.s_stream_vbi_fmt = cx18_s_stream_vbi_fmt,
117};
118