ASoC: davinci-mcasp: Fix TDM slot rx/tx mask associations

Fixes the associations between the tx_mask and rx_mask and the associated playback / capture streams during setting of the TDM slot. With this patch in place it is now possible for example to only populate tx_mask (leaving rx_mask as 0) for output-only codecs to control the TDM slot(s) the McASP serial port uses for transmit. Before that, this scenario would incorrectly rely on the rx_mask for this.

---
 sound/soc/davinci/davinci-mcasp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

index 4495a40..caa0beb 100644
@@ -681,8 +681,8 @@ static int davinci_mcasp_set_tdm_slot(struct snd_soc_dai *dai,
 	}
 
 	mcasp->tdm_slots = slots;
-	mcasp->tdm_mask[SNDRV_PCM_STREAM_PLAYBACK] = rx_mask;
-	mcasp->tdm_mask[SNDRV_PCM_STREAM_CAPTURE] = tx_mask;
+	mcasp->tdm_mask[SNDRV_PCM_STREAM_PLAYBACK] = tx_mask;
+	mcasp->tdm_mask[SNDRV_PCM_STREAM_CAPTURE] = rx_mask;
 	mcasp->slot_width = slot_width;
 
 	return davinci_mcasp_set_ch_constraints(mcasp);

1.9.1

For what little there is to review.

I only had HW that worked with symmetric masks, so I did not hit this myself. Should have hacked something to codec end to be able to test asymetric masks at McASP end.

Thanks,
Jyri

The patch

ASoC: davinci-mcasp: Fix TDM slot rx/tx mask associations

has been applied to the asoc tree at

git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git

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: Andreas Dannenberg <[email protected]>
Date: Mon, 9 Nov 2015 12:19:19 -0600
Subject: [PATCH] ASoC: davinci-mcasp: Fix TDM slot rx/tx mask associations

Fixes the associations between the tx_mask and rx_mask and the associated playback / capture streams during setting of the TDM slot. With this patch in place it is now possible for example to only populate tx_mask (leaving rx_mask as 0) for output-only codecs to control the TDM slot(s) the McASP serial port uses for transmit. Before that, this scenario would incorrectly rely on the rx_mask for this.

---
 sound/soc/davinci/davinci-mcasp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

index 4495a40a9468..caa0bebcd7f4 100644
@@ -681,8 +681,8 @@ static int davinci_mcasp_set_tdm_slot(struct snd_soc_dai *dai,
 	}
 
 	mcasp->tdm_slots = slots;
-	mcasp->tdm_mask[SNDRV_PCM_STREAM_PLAYBACK] = rx_mask;
-	mcasp->tdm_mask[SNDRV_PCM_STREAM_CAPTURE] = tx_mask;
+	mcasp->tdm_mask[SNDRV_PCM_STREAM_PLAYBACK] = tx_mask;
+	mcasp->tdm_mask[SNDRV_PCM_STREAM_CAPTURE] = rx_mask;
 	mcasp->slot_width = slot_width;
 
 	return davinci_mcasp_set_ch_constraints(mcasp);

2.6.2