Gentle ping...
BR
Joy Zou
-----Original Message-----
From: Joy Zou
Sent: 2022年5月24日 16:05
To: vkoul@xxxxxxxxxx
Cc: S.J. Wang <shengjiu.wang@xxxxxxx>; shawnguo@xxxxxxxxxx; s.hauer@xxxxxxxxxxxxxx; kernel@xxxxxxxxxxxxxx; festevam@xxxxxxxxx; dl-linux-imx <linux-imx@xxxxxxx>; dmaengine@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
Subject: [PATCH V2 2/2] dmaengine: imx-sdma: support hdmi audio
Add hdmi audio support in sdma.
Signed-off-by: Joy Zou <joy.zou@xxxxxxx>
---
Changes since v1:
moved data type to include/linux/dma/imx-dma.h
---
drivers/dma/imx-sdma.c | 38 +++++++++++++++++++++++++++++--------
include/linux/dma/imx-dma.h | 1 +
2 files changed, 31 insertions(+), 8 deletions(-)
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index 8535018ee7a2..e9b8b2e9f7c9 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -941,7 +941,10 @@ static irqreturn_t sdma_int_handler(int irq, void *dev_id)
desc = sdmac->desc;
if (desc) {
if (sdmac->flags & IMX_DMA_SG_LOOP) {
- sdma_update_channel_loop(sdmac);
+ if (sdmac->peripheral_type != IMX_DMATYPE_HDMI)
+ sdma_update_channel_loop(sdmac);
+ else
+ vchan_cyclic_callback(&desc->vd);
} else {
mxc_sdma_handle_channel_normal(sdmac);
vchan_cookie_complete(&desc->vd);
@@ -1061,6 +1064,10 @@ static int sdma_get_pc(struct sdma_channel *sdmac,
per_2_emi = sdma->script_addrs->sai_2_mcu_addr;
emi_2_per = sdma->script_addrs->mcu_2_sai_addr;
break;
+ case IMX_DMATYPE_HDMI:
+ emi_2_per = sdma->script_addrs->hdmi_dma_addr;
+ sdmac->is_ram_script = true;
+ break;
default:
dev_err(sdma->dev, "Unsupported transfer type %d\n",
peripheral_type);
@@ -1112,11 +1119,16 @@ static int sdma_load_context(struct sdma_channel *sdmac)
/* Send by context the event mask,base address for peripheral
* and watermark level
*/
- context->gReg[0] = sdmac->event_mask[1];
- context->gReg[1] = sdmac->event_mask[0];
- context->gReg[2] = sdmac->per_addr;
- context->gReg[6] = sdmac->shp_addr;
- context->gReg[7] = sdmac->watermark_level;
+ if (sdmac->peripheral_type == IMX_DMATYPE_HDMI) {
+ context->gReg[4] = sdmac->per_addr;
+ context->gReg[6] = sdmac->shp_addr;
+ } else {
+ context->gReg[0] = sdmac->event_mask[1];
+ context->gReg[1] = sdmac->event_mask[0];
+ context->gReg[2] = sdmac->per_addr;
+ context->gReg[6] = sdmac->shp_addr;
+ context->gReg[7] = sdmac->watermark_level;
+ }
bd0->mode.command = C0_SETDM;
bd0->mode.status = BD_DONE | BD_WRAP | BD_EXTD; @@ -1488,7 +1500,7 @@ static struct sdma_desc *sdma_transfer_init(struct sdma_channel *sdmac,
desc->sdmac = sdmac;
desc->num_bd = bds;
- if (sdma_alloc_bd(desc))
+ if (bds && sdma_alloc_bd(desc))
goto err_desc_out;
/* No slave_config called in MEMCPY case, so do here */ @@ -1653,13 +1665,16 @@ static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic( {
struct sdma_channel *sdmac = to_sdma_chan(chan);
struct sdma_engine *sdma = sdmac->sdma;
- int num_periods = buf_len / period_len;
+ int num_periods = 0;
int channel = sdmac->channel;
int i = 0, buf = 0;
struct sdma_desc *desc;
dev_dbg(sdma->dev, "%s channel: %d\n", __func__, channel);
+ if (sdmac->peripheral_type != IMX_DMATYPE_HDMI)
+ num_periods = buf_len / period_len;
+
sdma_config_write(chan, &sdmac->slave_config, direction);
desc = sdma_transfer_init(sdmac, direction, num_periods); @@ -1676,6 +1691,9 @@ static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic(
goto err_bd_out;
}
+ if (sdmac->peripheral_type == IMX_DMATYPE_HDMI)
+ return vchan_tx_prep(&sdmac->vc, &desc->vd, flags);
+
while (buf < buf_len) {
struct sdma_buffer_descriptor *bd = &desc->bd[i];
int param;
@@ -1736,6 +1754,10 @@ static int sdma_config_write(struct dma_chan *chan,
sdmac->watermark_level |= (dmaengine_cfg->dst_maxburst << 16) &
SDMA_WATERMARK_LEVEL_HWML;
sdmac->word_size = dmaengine_cfg->dst_addr_width;
+ } else if (sdmac->peripheral_type == IMX_DMATYPE_HDMI) {
+ sdmac->per_address = dmaengine_cfg->dst_addr;
+ sdmac->per_address2 = dmaengine_cfg->src_addr;
+ sdmac->watermark_level = 0;
} else {
sdmac->per_address = dmaengine_cfg->dst_addr;
sdmac->watermark_level = dmaengine_cfg->dst_maxburst * diff --git a/include/linux/dma/imx-dma.h b/include/linux/dma/imx-dma.h index 8887762360d4..ef72e00fb55e 100644
--- a/include/linux/dma/imx-dma.h
+++ b/include/linux/dma/imx-dma.h
@@ -40,6 +40,7 @@ enum sdma_peripheral_type {
IMX_DMATYPE_ASRC_SP, /* Shared ASRC */
IMX_DMATYPE_SAI, /* SAI */
IMX_DMATYPE_MULTI_SAI, /* MULTI FIFOs For Audio */
+ IMX_DMATYPE_HDMI, /* HDMI Audio */
};
enum imx_dma_prio {
--
2.25.1
