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(v: &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(objp: 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(fmt: 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(fmt: cx->vbi.sliced_in, is_pal: 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 | |