Hi all,
Today's linux-next merge of the sound-asoc tree got a conflict in
sound/soc/fsl/fsl_ssi.c between commit 0da9e55e71bc ("ASoC: fsl_ssi: Add
dual fifo mode support") from the slave-dma tree and commit c1953bfe1329
("ASoC: fsl-ssi: Add imx51-ssi and of_device_id matching") and
0888efd166fa ("ASoC: fsl-ssi: Fix interrupt stats for imx") from the
sound-asoc tree.
I fixed it up (I think - see below) and can carry the fix as necessary
(no action is required).
--
Cheers,
Stephen Rothwell sfr@xxxxxxxxxxxxxxxx
diff --cc sound/soc/fsl/fsl_ssi.c
index 2101fc5c5739,94dedcb0868d..000000000000
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@@ -140,8 -162,9 +162,10 @@@ struct fsl_ssi_private
bool ssi_on_imx;
bool imx_ac97;
bool use_dma;
+ bool use_dual_fifo;
bool baudclk_locked;
+ bool irq_stats;
+ bool offline_config;
u8 i2s_mode;
spinlock_t baudclk_lock;
struct clk *baudclk;
@@@ -1170,8 -1332,35 +1348,35 @@@ static int fsl_ssi_probe(struct platfor
ssi_private->baudclk_locked = false;
spin_lock_init(&ssi_private->baudclk_lock);
- if (of_device_is_compatible(pdev->dev.of_node, "fsl,imx21-ssi")) {
+ /*
+ * imx51 and later SoCs have a slightly different IP that allows the
+ * SSI configuration while the SSI unit is running.
+ *
+ * More important, it is necessary on those SoCs to configure the
+ * sperate TX/RX DMA bits just before starting the stream
+ * (fsl_ssi_trigger). The SDMA unit has to be configured before fsl_ssi
+ * sends any DMA requests to the SDMA unit, otherwise it is not defined
+ * how the SDMA unit handles the DMA request.
+ *
+ * SDMA units are present on devices starting at imx35 but the imx35
+ * reference manual states that the DMA bits should not be changed
+ * while the SSI unit is running (SSIEN). So we support the necessary
+ * online configuration of fsl-ssi starting at imx51.
+ */
+ switch (hw_type) {
+ case FSL_SSI_MCP8610:
+ case FSL_SSI_MX21:
+ case FSL_SSI_MX35:
+ ssi_private->offline_config = true;
+ break;
+ case FSL_SSI_MX51:
+ ssi_private->offline_config = false;
+ break;
+ }
+
+ if (hw_type == FSL_SSI_MX21 || hw_type == FSL_SSI_MX51 ||
+ hw_type == FSL_SSI_MX35) {
- u32 dma_events[2];
+ u32 dma_events[2], dmas[4];
ssi_private->ssi_on_imx = true;
ssi_private->clk = devm_clk_get(&pdev->dev, NULL);
@@@ -1234,16 -1424,13 +1440,22 @@@
dma_events[0], shared ? IMX_DMATYPE_SSI_SP : IMX_DMATYPE_SSI);
imx_pcm_dma_params_init_data(&ssi_private->filter_data_rx,
dma_events[1], shared ? IMX_DMATYPE_SSI_SP : IMX_DMATYPE_SSI);
+ if (!of_property_read_u32_array(pdev->dev.of_node, "dmas", dmas, 4)
+ && dmas[2] == IMX_DMATYPE_SSI_DUAL) {
+ ssi_private->use_dual_fifo = true;
+ /* When using dual fifo mode, we need to keep watermark
+ * as even numbers due to dma script limitation.
+ */
+ ssi_private->dma_params_tx.maxburst &= ~0x1;
+ ssi_private->dma_params_rx.maxburst &= ~0x1;
+ }
- } else if (ssi_private->use_dma) {
+ }
+
+ /*
+ * Enable interrupts only for MCP8610 and MX51. The other MXs have
+ * different writeable interrupt status registers.
+ */
+ if (ssi_private->use_dma) {
/* The 'name' should not have any slashes in it. */
ret = devm_request_irq(&pdev->dev, ssi_private->irq,
fsl_ssi_isr, 0, ssi_private->name,
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