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c3f9a1ac0e
The original vendor's driver programmed the dma controller's AHB HPROT values to enable bufferable, privileged mode. This along with the "same priorty for both channels" could very well fix the freezes that have been reported on the forum by @ticerex and @takimata. <https://forum.lede-project.org/t/wd-mybook-live-duo-two-disks/16195/46> Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
26 lines
878 B
Diff
26 lines
878 B
Diff
--- a/drivers/dma/dw/core.c
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+++ b/drivers/dma/dw/core.c
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@@ -167,6 +167,8 @@ static void dwc_initialize_chan_dw(struc
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cfghi |= DWC_CFGH_DST_PER(dwc->dws.dst_id);
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cfghi |= DWC_CFGH_SRC_PER(dwc->dws.src_id);
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+ cfghi |= DWC_CFGH_PROTCTL(3); /* bufferable + privileged access */
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+
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/* Set polarity of handshake interface */
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cfglo |= hs_polarity ? DWC_CFGL_HS_DST_POL | DWC_CFGL_HS_SRC_POL : 0;
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@@ -1293,11 +1295,8 @@ int dw_dma_probe(struct dw_dma_chip *chi
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else
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list_add(&dwc->chan.device_node, &dw->dma.channels);
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- /* 7 is highest priority & 0 is lowest. */
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- if (pdata->chan_priority == CHAN_PRIORITY_ASCENDING)
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- dwc->priority = pdata->nr_channels - i - 1;
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- else
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- dwc->priority = i;
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+ /* set all channels to the same priority */
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+ dwc->priority = pdata->nr_channels - 1;
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dwc->ch_regs = &__dw_regs(dw)->CHAN[i];
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spin_lock_init(&dwc->lock);
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