V4L/DVB (10433): cx18: Defer A/V core initialization until a valid cx18_av_cmd arrives (e474200d) · Commits · 戴 / test

drivers/media/video/cx18/cx18-av-core.c

+33 −7

Original line number	Diff line number	Diff line
		@@ -680,19 +680,45 @@ static int set_v4lfmt(struct cx18 cx, struct v4l2_format fmt)

		/* ----------------------------------------------------------------------- */

		static int valid_av_cmd(unsigned int cmd)
		{
		switch (cmd) {
		/* All commands supported by cx18_av_cmd() */
		case VIDIOC_INT_DECODE_VBI_LINE:
		case VIDIOC_INT_AUDIO_CLOCK_FREQ:
		case VIDIOC_STREAMON:
		case VIDIOC_STREAMOFF:
		case VIDIOC_LOG_STATUS:
		case VIDIOC_G_CTRL:
		case VIDIOC_S_CTRL:
		case VIDIOC_QUERYCTRL:
		case VIDIOC_G_STD:
		case VIDIOC_S_STD:
		case AUDC_SET_RADIO:
		case VIDIOC_INT_G_VIDEO_ROUTING:
		case VIDIOC_INT_S_VIDEO_ROUTING:
		case VIDIOC_INT_G_AUDIO_ROUTING:
		case VIDIOC_INT_S_AUDIO_ROUTING:
		case VIDIOC_S_FREQUENCY:
		case VIDIOC_G_TUNER:
		case VIDIOC_S_TUNER:
		case VIDIOC_G_FMT:
		case VIDIOC_S_FMT:
		case VIDIOC_INT_RESET:
		return 1;
		default:
		return 0;
		}
		return 0;
		}

		int cx18_av_cmd(struct cx18 cx, unsigned int cmd, void arg)
		{
		struct cx18_av_state *state = &cx->av_state;
		struct v4l2_tuner *vt = arg;
		struct v4l2_routing *route = arg;

		/* ignore these commands */
		switch (cmd) {
		case TUNER_SET_TYPE_ADDR:
		return 0;
		}

		if (!state->is_initialized) {
		if (!state->is_initialized && valid_av_cmd(cmd)) {
		CX18_DEBUG_INFO("cmd %08x triggered fw load\n", cmd);
		/* initialize on first use */
		state->is_initialized = 1;