On 30/08/17 16:04, Ritesh Harjani wrote: > Without this patch the CQHCI registers are getting reset > again. > > Signed-off-by: Ritesh Harjani <riteshh@xxxxxxxxxxxxxx> > --- > drivers/mmc/host/cqhci.c | 7 +++---- > 1 file changed, 3 insertions(+), 4 deletions(-) > > diff --git a/drivers/mmc/host/cqhci.c b/drivers/mmc/host/cqhci.c > index 8650a13..2a7351c 100644 > --- a/drivers/mmc/host/cqhci.c > +++ b/drivers/mmc/host/cqhci.c > @@ -262,6 +262,9 @@ static void __cqhci_enable(struct cqhci_host *cq_host) > > cqhci_writel(cq_host, cqcfg, CQHCI_CFG); > > + cqcfg |= CQHCI_ENABLE; > + cqhci_writel(cq_host, cqcfg, CQHCI_CFG); That doesn't follow the flow in the specification B.6.1. Command Queuing Initialization Sequence. Also in B.3.5 Task List, the spec. says "Changing the value of TDLBA is not allowed when command queue mode is enabled." So you will need to add a quirk for this. > + > cqhci_writel(cq_host, lower_32_bits(cq_host->desc_dma_base), > CQHCI_TDLBA); > cqhci_writel(cq_host, upper_32_bits(cq_host->desc_dma_base), > @@ -271,10 +274,6 @@ static void __cqhci_enable(struct cqhci_host *cq_host) > > cqhci_set_irqs(cq_host, 0); > > - cqcfg |= CQHCI_ENABLE; > - > - cqhci_writel(cq_host, cqcfg, CQHCI_CFG); > - > mmc->cqe_on = true; > > if (cq_host->ops->enable) > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
