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display: xlnx_dp: Provide sufficient bytes for silent audio channel

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Fill the audio channel with required number of bytes to cover the
elapsed time. This prevents rate control reset, and avoids debug prints
like below

log:
	Resetting rate control (65692 samples)
	...
	Resetting rate control (65721 samples)
	...

Signed-off-by: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 1573833408-2388-1-git-send-email-sai.pavan.boddu@xilinx.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Sai Pavan Boddu 2019-11-15 21:26:48 +05:30 committed by Gerd Hoffmann
parent 7ffc90f3ae
commit 0f6ed883e7
1 changed files with 7 additions and 2 deletions
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9
hw/display/xlnx_dp.c
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@ -394,13 +394,18 @@ static void xlnx_dp_audio_callback(void *opaque, int avail)
written = AUD_write(s->amixer_output_stream,
&s->out_buffer[s->data_ptr], s->byte_left);
} else {
int len_to_copy;
/*
* There is nothing to play.. We don't have any data! Fill the
* buffer with zero's and send it.
*/
written = 0;
memset(s->out_buffer, 0, 1024);
AUD_write(s->amixer_output_stream, s->out_buffer, 1024);
while (avail) {
len_to_copy = MIN(AUD_CHBUF_MAX_DEPTH, avail);
memset(s->out_buffer, 0, len_to_copy);
avail -= AUD_write(s->amixer_output_stream, s->out_buffer,
len_to_copy);
}
}
} else {
written = AUD_write(s->amixer_output_stream,