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 
19 static 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 
75 static 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 
92 static 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 
104 static 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 
112 const 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