pmac also apply the DMA stop work around to fix capture on iBook2
PATCH 1/1 pmac also apply the DMA stop work around to fix capture on iBook2
Hi all,
the attached patch for the pmac driver fixes capture for at least all iBook2s I have access to. Without the fix arround 33% percent of all recordings are just white noise.
Have fun,
René Rebe
pmac.c renamed from pmac.c~ +6 -6
@@ -224,15 +224,15 @@/* We really want to execute a DMA stop command, after the AWACS * is initialized. * For reasons I don't understand, it stops the hissing noise -* common to many PowerBook G3 systems (like mine :-). +* common to many PowerBook G3 systems and random noise otherwise +* captured on iBook2's about every third time. -ReneR */ spin_lock_irq (&chip->reg_lock);snd_pmac_dma_stop (rec); -if (rec->stream ==SNDRV_PCM_STREAM_PLAYBACK ) { -st_le16 (&chip->extra_dma.cmds->command,DBDMA_STOP ); -snd_pmac_dma_set_command (rec, &chip->extra_dma); -snd_pmac_dma_run (rec,RUN ); - } +st_le16 (&chip->extra_dma.cmds->command,DBDMA_STOP ); +snd_pmac_dma_set_command (rec, &chip->extra_dma); +snd_pmac_dma_run (rec,RUN ); +mdelay (5 );/* continuous DMA memory type doesn't provide the physical address, * so we need to resolve the address here... */
Takashi Iwai
AppliedAt Fri, 30 Jul 2004 16:56:29 +0200,
Quoted 6 lines · Rene Rebe
Hi all,
the attached patch for the pmac driver fixes capture for at least all iBook2s I have access to. Without the fix arround 33% percent of all recordings are just white noise.
Thanks, applied to cvs now.
Takashi
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