cx18-controls.c (3537B)
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};