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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * cx18 ioctl control functions4 *5 * Derived from ivtv-controls.c6 *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 else69 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 sample98 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