18 Dec
2015
18 Dec
'15
1:04 p.m.
On Fri, Dec 04, 2015 at 06:40:38PM -0500, Alex Deucher wrote:
+static irqreturn_t dma_irq_handler(int irq, void *arg) +{
- u16 dscr_idx;
- u32 intr_flag;
- int priority_level = 0;
- struct device *dev = arg;
- struct audio_drv_data *irq_data;
- void __iomem *acp_mmio;
- irq_data = dev_get_drvdata(dev);
- acp_mmio = irq_data->acp_mmio;
- intr_flag = acp_get_intr_flag(acp_mmio);
- if ((intr_flag & BIT(ACP_TO_I2S_DMA_CH_NUM)) != 0) {
- if ((intr_flag & BIT(I2S_TO_ACP_DMA_CH_NUM)) != 0) {
- if ((intr_flag & BIT(ACP_TO_SYSRAM_CH_NUM)) != 0) {
snd_pcm_period_elapsed(irq_data->capture_stream);acp_ext_stat_clear_dmaioc(acp_mmio, ACP_TO_SYSRAM_CH_NUM);- }
- return IRQ_HANDLED;
What if none of those flags were set?
mul = (dscr == PLAYBACK_START_DMA_DESCR_CH13) ? 0 : 1;pos = (mul * period_bytes);
Please just write normal if statements, they're a lot more legible than the ternery operator.
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- case SNDRV_PCM_TRIGGER_RESUME:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {acp_dma_start(rtd->acp_mmio,SYSRAM_TO_ACP_CH_NUM, false);while (acp_reg_read(rtd->acp_mmio, mmACP_DMA_CH_STS) &BIT(SYSRAM_TO_ACP_CH_NUM))cpu_relax();
This needs a timeout in case things go wrong, otherwise we lock up.