From 2c92e2fbe9e22cefdae87d8a0d654691ee4c1957 Mon Sep 17 00:00:00 2001 From: Joris Verhaegen Date: Fri, 5 Sep 2025 10:12:54 +0100 Subject: ALSA: compress_offload: Add 64-bit safe timestamp infrastructure The copied_total field in struct snd_compr_tstamp is a 32-bit value that can overflow on long-running high-bitrate streams, leading to incorrect calculations for buffer availablility. This patch adds a 64-bit safe timestamping mechanism. A new UAPI struct, snd_compr_tstamp64, is added which uses 64-bit types for byte counters. The relevant ops structures across the ASoC and core compress code are updated to use this new struct. ASoC drivers are updated to use u64 counters. Internal timestamps being u64 now, a compatibility function is added to convert the 64-bit timestamp back to the 32-bit format for legacy ioctl callers. Reviewed-by: Miller Liang Tested-by: Joris Verhaegen Signed-off-by: Joris Verhaegen Reviewed-by: Srinivas Kandagatla Reviewed-by: Charles Keepax Acked-by: Mark Brown Acked-by: Vinod Koul Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20250905091301.2711705-2-verhaegen@google.com --- sound/soc/sof/amd/acp-probes.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'sound/soc/sof/amd') diff --git a/sound/soc/sof/amd/acp-probes.c b/sound/soc/sof/amd/acp-probes.c index 0d0f8ec4aed8..ce51ed108a47 100644 --- a/sound/soc/sof/amd/acp-probes.c +++ b/sound/soc/sof/amd/acp-probes.c @@ -108,7 +108,7 @@ static int acp_probes_compr_trigger(struct sof_client_dev *cdev, static int acp_probes_compr_pointer(struct sof_client_dev *cdev, struct snd_compr_stream *cstream, - struct snd_compr_tstamp *tstamp, + struct snd_compr_tstamp64 *tstamp, struct snd_soc_dai *dai) { struct acp_dsp_stream *stream = cstream->runtime->private_data; -- cgit v1.2.3