LXR linux/drivers/media/pci/cx18/cx18-controls.c

   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