Re: [PATCH v3 2/5] soc: qcom: geni: Add support for gpi dma

[Vinod Koul <vkoul@kernel.org>]

Hi Doug,

On 28-06-21, 16:38, Doug Anderson wrote:
> Hi,
> 
> On Thu, Jun 24, 2021 at 10:22 PM Vinod Koul <vkoul@kernel.org> wrote:
> >
> > +static void geni_se_select_gpi_mode(struct geni_se *se)
> > +{
> > +       u32 val;
> > +
> > +       geni_se_irq_clear(se);
> > +
> > +       writel(0, se->base + SE_IRQ_EN);
> > +
> > +       val = readl(se->base + SE_GENI_S_IRQ_EN);
> > +       val &= ~S_CMD_DONE_EN;
> > +       writel(val, se->base + SE_GENI_S_IRQ_EN);
> > +
> > +       val = readl(se->base + SE_GENI_M_IRQ_EN);
> > +       val &= ~(M_CMD_DONE_EN | M_TX_FIFO_WATERMARK_EN |
> > +                M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN);
> > +       writel(val, se->base + SE_GENI_M_IRQ_EN);
> > +
> > +       writel(GENI_DMA_MODE_EN, se->base + SE_GENI_DMA_MODE_EN);
> > +
> > +       val = readl(se->base + SE_GSI_EVENT_EN);
> > +       val |= (DMA_RX_EVENT_EN | DMA_TX_EVENT_EN | GENI_M_EVENT_EN | GENI_S_EVENT_EN);
> 
> nit: the above has some extra parenthesis that aren't needed.
> 
> I will continue to assert that all of the "set mode" stuff doesn't
> really belong here and should be managed by individual drivers [1].
> I'll accept that it doesn't have to block forward progress, though I'm
> at least a bit disappointed that we asked Qualcomm to do this over 8
> months ago and no action was taken. :(
> 
> In any case, this looks OK to me:
> 
> Reviewed-by: Douglas Anderson <dianders@chromium.org>

Thanks for the review.

> 
> [1] https://lore.kernel.org/r/CAD=FV=VWPqswOXJejyXjYT_Yspdu75ELq42cffN87FrpTwPUQg@mail.gmail.com/

I agree we should do something, will discuss with Bjorn and try to help
here.

Regards
-- 
~Vinod