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ALSA: hda - mask buggy stream DMA0 for Broadwell display controller
authorMengdong Lin <mengdong.lin@intel.com>
Tue, 13 May 2014 08:57:08 +0000 (16:57 +0800)
committerTakashi Iwai <tiwai@suse.de>
Tue, 13 May 2014 10:11:58 +0000 (12:11 +0200)
commit7189eb9b8f7962474956196c301676470542f253
tree0fc40bb01dd753d2e4fb5014582276dd3e34250btree | snapshot
parentec5fe98886b686f065ef29d8dee1b3ca66f5fd48commit | diff
ALSA: hda - mask buggy stream DMA0 for Broadwell display controller

Broadwell display controller has 3 stream DMA engines. DMA0 cannot update DMA
postion buffer properly while DMA1 and DMA2 can work well. So this patch masks
the buggy DMA0 by keeping it as opened.

This is a tentative workaround, so keep the change small as Takashi suggested.

Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/pci/hda/hda_intel.c diff | blob | history
Linux kernel for KaRo TX COM modules