[PATCH v3 4/7] ASoC: sun4i-codec: Add playback only flag to quirks

[Ryan Walklin <ryan@testtoast.com>]

From: Marcus Cooper <codekipper@gmail.com>

Some devices only have the playback side of the codec implemented
so add a quirk to check for this. This flag is only required internally
within the codec driver, as the DAI is configured for playback only
(capture disabled) separately in the create_card() function for these
devices.

Signed-off-by: Marcus Cooper <codekipper@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>

---
Changelog v2..v3:
- Add a note regarding internal usage of the playback_only quirk.
---
 sound/soc/sunxi/sun4i-codec.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/sound/soc/sunxi/sun4i-codec.c b/sound/soc/sunxi/sun4i-codec.c
index 37f5678b55291..312d2655c3f4e 100644
--- a/sound/soc/sunxi/sun4i-codec.c
+++ b/sound/soc/sunxi/sun4i-codec.c
@@ -1571,6 +1571,7 @@ struct sun4i_codec_quirks {
 	unsigned int reg_dac_txdata;	/* TX FIFO offset for DMA config */
 	unsigned int reg_adc_rxdata;	/* RX FIFO offset for DMA config */
 	bool has_reset;
+	bool playback_only;
 };
 
 static const struct sun4i_codec_quirks sun4i_codec_quirks = {
@@ -1779,10 +1780,13 @@ static int sun4i_codec_probe(struct platform_device *pdev)
 	scodec->playback_dma_data.maxburst = 8;
 	scodec->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
 
-	/* DMA configuration for RX FIFO */
-	scodec->capture_dma_data.addr = res->start + quirks->reg_adc_rxdata;
-	scodec->capture_dma_data.maxburst = 8;
-	scodec->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
+	if (!quirks->playback_only) {
+		/* DMA configuration for RX FIFO */
+		scodec->capture_dma_data.addr = res->start +
+						quirks->reg_adc_rxdata;
+		scodec->capture_dma_data.maxburst = 8;
+		scodec->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
+	}
 
 	ret = devm_snd_soc_register_component(&pdev->dev, quirks->codec,
 				     &sun4i_codec_dai, 1);
-- 
2.47.0