[alsa-devel] Applied "ASoC: SOF: Intel: hda: fix reset of host_period_bytes" to the asoc tree

[Mark Brown]

The patch

   ASoC: SOF: Intel: hda: fix reset of host_period_bytes

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.5

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From f567ff6c76f7e9b317248fcab7a0eb3ef432dc9e Mon Sep 17 00:00:00 2001
From: Marcin Rajwa <marcin.rajwa at linux.intel.com>
Date: Fri, 27 Sep 2019 15:05:34 -0500
Subject: [PATCH] ASoC: SOF: Intel: hda: fix reset of host_period_bytes

This patch prevents the reset of host period bytes
and uses no_stream_position to record requests
for stream position.

Signed-off-by: Marcin Rajwa <marcin.rajwa at linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
Link: https://lore.kernel.org/r/20190927200538.660-10-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/sof/intel/hda-pcm.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/sound/soc/sof/intel/hda-pcm.c b/sound/soc/sof/intel/hda-pcm.c
index 9b730f183529..575f5f5877d8 100644
--- a/sound/soc/sof/intel/hda-pcm.c
+++ b/sound/soc/sof/intel/hda-pcm.c
@@ -89,6 +89,7 @@ int hda_dsp_pcm_hw_params(struct snd_sof_dev *sdev,
 	struct hdac_ext_stream *stream = stream_to_hdac_ext_stream(hstream);
 	struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
 	struct snd_dma_buffer *dmab;
+	struct sof_ipc_fw_version *v = &sdev->fw_ready.version;
 	int ret;
 	u32 size, rate, bits;
 
@@ -116,9 +117,17 @@ int hda_dsp_pcm_hw_params(struct snd_sof_dev *sdev,
 	/* disable SPIB, to enable buffer wrap for stream */
 	hda_dsp_stream_spib_config(sdev, stream, HDA_DSP_SPIB_DISABLE, 0);
 
-	/* set host_period_bytes to 0 if no IPC position */
-	if (hda && hda->no_ipc_position)
-		ipc_params->host_period_bytes = 0;
+	/* update no_stream_position flag for ipc params */
+	if (hda && hda->no_ipc_position) {
+		/* For older ABIs set host_period_bytes to zero to inform
+		 * FW we don't want position updates. Newer versions use
+		 * no_stream_position for this purpose.
+		 */
+		if (v->abi_version < SOF_ABI_VER(3, 10, 0))
+			ipc_params->host_period_bytes = 0;
+		else
+			ipc_params->no_stream_position = 1;
+	}
 
 	ipc_params->stream_tag = hstream->stream_tag;
 
-- 
2.20.1