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Commit 412bbe7d authored by Takashi Iwai's avatar Takashi Iwai
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ALSA: x86: Explicit specify 32bit DMA 



LPE audio is capable only up to 32bit address, as it seems.
Then we should limit the DMA addresses accordingly via dma-mapping
API.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent c1a7c40c

sound/x86/intel_hdmi_audio.c

+6 −2
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 
#include <linux/module.h>

#include <linux/interrupt.h>

#include <linux/pm_runtime.h>

#include <linux/dma-mapping.h>

#include <asm/cacheflush.h>

#include <sound/core.h>

#include <sound/asoundef.h>
@@ -1825,8 +1826,6 @@ static int hdmi_lpe_audio_probe(struct platform_device *pdev) 
	struct resource *res_mmio;

	int i, ret;



	dev_dbg(&pdev->dev, "dma_mask: %p\n", pdev->dev.dma_mask);



	pdata = pdev->dev.platform_data;

	if (!pdata) {

		dev_err(&pdev->dev, "%s: quit: pdata not allocated by i915!!\n", __func__);
@@ -1907,6 +1906,11 @@ static int hdmi_lpe_audio_probe(struct platform_device *pdev) 
	/* setup the ops for playabck */

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,

			    &snd_intelhad_playback_ops);



	/* only 32bit addressable */

	dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));

	dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));



	/* allocate dma pages for ALSA stream operations

	 * memory allocated is based on size, not max value

	 * thus using same argument for max & size