Hi, I am rying to implement the AC97, on S3C6410, using the WM9714. I have done some big step forward but I am now hitting another issue. The kernel can see the WM9714: <6>ALSA device list: <6> #0: SMDK (WM9713) Anyway, after that, i cannot see anymore activity on the AC97 bus. I got, indeed, these errors: <3>s3c-ac97: req addr = 12, rep addr = 00 [...] <3>s3c-ac97: req addr = 12, rep addr = 00 When I try to play something, i got this : <7>Entered s3c_dma_open <7>asoc: AC97 HiFi <-> s3c-ac97 info: <7>asoc: rate mask 0xd6 <7>asoc: min ch 2 max ch 2 <7>asoc: min rate 8000 max rate 48000 <7>Entered s3c_dma_hw_params <7>params c0665190, client c0665278, channel 22 <7>dma22: s3c2410_request_dma: client=AC97 PCMOut, dev=(null) <7>MS10 channel number 22 <7>DMA8: 00000000->00000000 L 00000000 C 00000000,00000000 S 00000000 <7>s3c2410_dma_request: channel initialised, c06779c8 <7>Entered s3c_dma_prepare <7>s3c2410_dma_devconfig: channel 22, source 1, dev 7f001018, chan c06779c8 <7>s3c2410_dma_devconfig: peripheral 6 <7>s3c2410_dma_devconfig: config 0000c980 <7>DMA8: 00000000->00000000 L 00000000 C 00000000,00000000 S 0000c980 <7>s3c64xx_dma_flush: flushing channel <7>Entered s3c_dma_enqueue <7>s3c_dma_enqueue: loaded 0, limit 11 <7>dma_loaded: 0 <7>dma enqueue channel num 22, reg cf00c100 <7>s3c2410_dma_enqueue: buff c6e4f4e0, dp 5e740000 lli (ffcd6000, 56ea3000) 8192 <7>enquing onto empty channel num 22 <7>s3c64xx_lli_to_regs: LLI ffcd6000 => regs <7>LLI[ffcd6000] 5e740000->7f001018, NL 00000000 C 96480000,00000800 <7>LLI[ffcd6000] 5e740000->7f001018, NL 00000000 C 96480000,00000800 <7>DMA8: 5e740000->7f001018 L 00000000 C 96480000,00000000 S 0000c980 <7>DMA8: buffs next c6e4f4e0, curr c6e4f4e0, end c6e4f4e0 <7>dma_loaded: 1 <7>dma enqueue channel num 22, reg cf00c100 <7>s3c2410_dma_enqueue: buff c6e4f540, dp 5e742000 lli (ffcd6020, 56ea3020) 8192 <7>enquing onto channel num 22 <7>LLI[ffcd6000] 5e740000->7f001018, NL 56ea3020 C 96480000,00000800 <7>LLI[ffcd6020] 5e742000->7f001018, NL 56ea3000 C 96480000,00000800 <7>DMA8: 5e740000->7f001018 L 56ea3020 C 96480000,00000000 S 0000c980 <7>DMA8: buffs next c6e4f540, curr c6e4f4e0, end c6e4f540 <7>dma_loaded: 2 <7>dma enqueue channel num 22, reg cf00c100 <7>s3c2410_dma_enqueue: buff c6e4f560, dp 5e744000 lli (ffcd6040, 56ea3040) 8192 <7>enquing onto channel num 22 <7>LLI[ffcd6020] 5e742000->7f001018, NL 56ea3040 C 96480000,00000800 <7>LLI[ffcd6040] 5e744000->7f001018, NL 56ea3000 C 96480000,00000800 <7>DMA8: 5e740000->7f001018 L 56ea3020 C 96480000,00000000 S 0000c980 <7>DMA8: buffs next c6e4f540, curr c6e4f4e0, end c6e4f560 <7>dma_loaded: 3 <7>dma enqueue channel num 22, reg cf00c100 <7>s3c2410_dma_enqueue: buff c6e4f580, dp 5e746000 lli (ffcd6060, 56ea3060) 8192 <7>enquing onto channel num 22 <7>LLI[ffcd6040] 5e744000->7f001018, NL 56ea3060 C 96480000,00000800 <7>LLI[ffcd6060] 5e746000->7f001018, NL 56ea3000 C 96480000,00000800 <7>DMA8: 5e740000->7f001018 L 56ea3020 C 96480000,00000000 S 0000c980 <7>DMA8: buffs next c6e4f540, curr c6e4f4e0, end c6e4f580 <7>dma_loaded: 4 <7>dma enqueue channel num 22, reg cf00c100 <7>s3c2410_dma_enqueue: buff c6e4f5a0, dp 5e748000 lli (ffcd6080, 56ea3080) 8192 <7>enquing onto channel num 22 <7>LLI[ffcd6060] 5e746000->7f001018, NL 56ea3080 C 96480000,00000800 <7>LLI[ffcd6080] 5e748000->7f001018, NL 56ea3000 C 96480000,00000800 <7>DMA8: 5e740000->7f001018 L 56ea3020 C 96480000,00000000 S 0000c980 <7>DMA8: buffs next c6e4f540, curr c6e4f4e0, end c6e4f5a0 <7>dma_loaded: 5 <7>dma enqueue channel num 22, reg cf00c100 <7>s3c2410_dma_enqueue: buff c6e4f5c0, dp 5e74a000 lli (ffcd60a0, 56ea30a0) 8192 <7>enquing onto channel num 22 <7>LLI[ffcd6080] 5e748000->7f001018, NL 56ea30a0 C 96480000,00000800 <7>LLI[ffcd60a0] 5e74a000->7f001018, NL 56ea3000 C 96480000,00000800 <7>DMA8: 5e740000->7f001018 L 56ea3020 C 96480000,00000000 S 0000c980 <7>DMA8: buffs next c6e4f540, curr c6e4f4e0, end c6e4f5c0 <7>dma_loaded: 6 <7>dma enqueue channel num 22, reg cf00c100 <7>s3c2410_dma_enqueue: buff c6e4f5e0, dp 5e74c000 lli (ffcd60c0, 56ea30c0) 8192 <7>enquing onto channel num 22 <7>LLI[ffcd60a0] 5e74a000->7f001018, NL 56ea30c0 C 96480000,00000800 <7>LLI[ffcd60c0] 5e74c000->7f001018, NL 56ea3000 C 96480000,00000800 <7>DMA8: 5e740000->7f001018 L 56ea3020 C 96480000,00000000 S 0000c980 <7>DMA8: buffs next c6e4f540, curr c6e4f4e0, end c6e4f5e0 <7>dma_loaded: 7 <7>dma enqueue channel num 22, reg cf00c100 <7>s3c2410_dma_enqueue: buff c6e4f600, dp 5e74e000 lli (ffcd60e0, 56ea30e0) 8192 <7>enquing onto channel num 22 <7>LLI[ffcd60c0] 5e74c000->7f001018, NL 56ea30e0 C 96480000,00000800 <7>LLI[ffcd60e0] 5e74e000->7f001018, NL 56ea3000 C 96480000,00000800 <7>DMA8: 5e740000->7f001018 L 56ea3020 C 96480000,00000000 S 0000c980 <7>DMA8: buffs next c6e4f540, curr c6e4f4e0, end c6e4f600 <7>dma_loaded: 8 <7>dma enqueue channel num 22, reg cf00c100 <7>s3c2410_dma_enqueue: buff c6e4f620, dp 5e750000 lli (ffcd6100, 56ea3100) 8192 <7>enquing onto channel num 22 <7>LLI[ffcd60e0] 5e74e000->7f001018, NL 56ea3100 C 96480000,00000800 <7>LLI[ffcd6100] 5e750000->7f001018, NL 56ea3000 C 96480000,00000800 <7>DMA8: 5e740000->7f001018 L 56ea3020 C 96480000,00000000 S 0000c980 <7>DMA8: buffs next c6e4f540, curr c6e4f4e0, end c6e4f620 <7>dma_loaded: 9 <7>dma enqueue channel num 22, reg cf00c100 <7>s3c2410_dma_enqueue: buff c6e4f640, dp 5e752000 lli (ffcd6120, 56ea3120) 8192 <7>enquing onto channel num 22 <7>LLI[ffcd6100] 5e750000->7f001018, NL 56ea3120 C 96480000,00000800 <7>LLI[ffcd6120] 5e752000->7f001018, NL 56ea3000 C 96480000,00000800 <7>DMA8: 5e740000->7f001018 L 56ea3020 C 96480000,00000000 S 0000c980 <7>DMA8: buffs next c6e4f540, curr c6e4f4e0, end c6e4f640 <7>dma_loaded: 10 <7>dma enqueue channel num 22, reg cf00c100 <7>s3c2410_dma_enqueue: buff c6e4f660, dp 5e754000 lli (ffcd6140, 56ea3140) 8192 <7>enquing onto channel num 22 <7>LLI[ffcd6120] 5e752000->7f001018, NL 56ea3140 C 96480000,00000800 <7>LLI[ffcd6140] 5e754000->7f001018, NL 56ea3000 C 96480000,00000800 <7>DMA8: 5e740000->7f001018 L 56ea3020 C 96480000,00000000 S 0000c980 <7>DMA8: buffs next c6e4f540, curr c6e4f4e0, end c6e4f660 <7>Entered s3c_dma_trigger <7>DMA8: 5e740000->7f001018 L 56ea3020 C 96480000,00000000 S 0000c980 <7>s3c64xx_dma_start: clearing interrupts, chan number 8, reg cf00c100 <7>s3c64xx_dma_start: starting channel <7>s3c64xx_dma_start: writing config 0000c981 <7>Entered s3c_dma_pointer <7>Pointer 5e740010 7f001018 <7>Entered s3c_dma_pointer <7>Pointer 5e740010 7f001018 <7>ALSA sound/core/pcm_lib.c:1755: playback write error (DMA or IRQ trouble?) <7>Entered s3c_dma_pointer <7>Pointer 5e740010 7f001018 <7>ALSA sound/core/pcm_lib.c:1755: playback write error (DMA or IRQ trouble?) <7>Entered s3c_dma_trigger <7>s3c64xx_dma_stop: stopping channel <7>DMA8: 5e740010->7f001018 L 56ea3020 C 96480000,00000800 S 0002c981 I have the feeling that, for some reasons, the DMA is not doing its job. I have added the following line on the init of dma.c but it does not fix the error: s3c64xx_dma_init1(8, DMACH_AC97_PCMOUT, IRQ_DMA1, 0x75100000); Can someone, please, give me some feedback? I am using kernel 2.6.35 and the head of Android. Cheers Marco -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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