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authorJose Abreu <Jose.Abreu@synopsys.com>2016-12-13 11:03:49 +0000
committerMark Brown <broonie@kernel.org>2016-12-14 14:38:10 +0000
commit6fce983f9b3ef51d47e647b2cff15049ef803781 (patch)
treef96b8e3c51cad5fe29f7aed5f91d688cea61daed /sound
parenta5de5b74a50113564a1e0850e2da96c37c35e55d (diff)
downloadlinux-6fce983f9b3ef51d47e647b2cff15049ef803781.tar.bz2
ASoC: dwc: Fix PIO mode initialization
We can no longer rely on the return value of devm_snd_dmaengine_pcm_register(...) to check if the DMA handle is declared in the DT. Previously this check activated PIO mode but currently dma_request_chan returns either a valid channel or -EPROBE_DEFER. In order to activate PIO mode check instead if the interrupt line is declared. This reflects better what is documented in the DT bindings (see Documentation/devicetree/bindings/sound/ designware-i2s.txt). Also, initialize use_pio variable which was never being set causing PIO mode to never work. Signed-off-by: Jose Abreu <joabreu@synopsys.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/dwc/designware_i2s.c25
1 files changed, 11 insertions, 14 deletions
diff --git a/sound/soc/dwc/designware_i2s.c b/sound/soc/dwc/designware_i2s.c
index 2998954a1c74..bdf8398cbc81 100644
--- a/sound/soc/dwc/designware_i2s.c
+++ b/sound/soc/dwc/designware_i2s.c
@@ -681,22 +681,19 @@ static int dw_i2s_probe(struct platform_device *pdev)
}
if (!pdata) {
- ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
- if (ret == -EPROBE_DEFER) {
- dev_err(&pdev->dev,
- "failed to register PCM, deferring probe\n");
- return ret;
- } else if (ret) {
- dev_err(&pdev->dev,
- "Could not register DMA PCM: %d\n"
- "falling back to PIO mode\n", ret);
+ if (irq >= 0) {
ret = dw_pcm_register(pdev);
- if (ret) {
- dev_err(&pdev->dev,
- "Could not register PIO PCM: %d\n",
+ dev->use_pio = true;
+ } else {
+ ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL,
+ 0);
+ dev->use_pio = false;
+ }
+
+ if (ret) {
+ dev_err(&pdev->dev, "could not register pcm: %d\n",
ret);
- goto err_clk_disable;
- }
+ goto err_clk_disable;
}
}