Re: [PATCH v5 3/8] remoteproc: Move proxy unvote to handover irq handler

[Sibi S <sibis@xxxxxxxxxxxxxx>]

Hi Bjorn,
Thanks for the review.

On 05/22/2018 10:05 AM, Bjorn Andersson wrote:
> On Mon 21 May 10:27 PDT 2018, Sibi Sankar wrote:
>
> > Introduce interrupt handler for smp2p ready interrupt to
> > handle start completion. Move the proxy votes for clocks
> > and regulators to the handover interrupt context.
> >
> > Signed-off-by: Sibi Sankar <sibis@xxxxxxxxxxxxxx>
>
> I added the "synchronization logic" of patch 4 to this one, to make it
> functional and after testing on db820c I merged patch 3 through 8 into
> rproc-next.

making the q6v5_request_irq return the irq number seems more elegant
unlike the approach I took earlier.

> I skipped the remainder of patch 4, as I think the ready_irq should be
> included and I wonder if irq management can remove the need for the
> "running" variable.

will include the ready_irq as well. I think we may need to keep
"running" for coredump but will check if it can substituted with
irq management.

> I also moved the enable_irq before we actually start the core, since
> it's been shown downstream that the smp2p irq might fire fast enough for
> us to miss it (and the smp2p driver does not redeliver interrupts).
>
> Regards,
> Bjorn
>
> > ---
> >   drivers/remoteproc/qcom_q6v5_pil.c | 29 +++++++++++++++++++++++------
> >   1 file changed, 23 insertions(+), 6 deletions(-)
> >
> > diff --git a/drivers/remoteproc/qcom_q6v5_pil.c b/drivers/remoteproc/qcom_q6v5_pil.c
> > index 76a0c00aa04a..6333bdcd9448 100644
> > --- a/drivers/remoteproc/qcom_q6v5_pil.c
> > +++ b/drivers/remoteproc/qcom_q6v5_pil.c
> > @@ -809,11 +809,6 @@ static int q6v5_start(struct rproc *rproc)
> >   			"Failed to reclaim mba buffer system may become unstable\n");
> >   	qproc->running = true;
> >   
> > -	q6v5_clk_disable(qproc->dev, qproc->proxy_clks,
> > -			 qproc->proxy_clk_count);
> > -	q6v5_regulator_disable(qproc, qproc->proxy_regs,
> > -			       qproc->proxy_reg_count);
> > -
> >   	return 0;
> >   
> >   reclaim_mpss:
> > @@ -892,6 +887,12 @@ static int q6v5_stop(struct rproc *rproc)
> >   	WARN_ON(ret);
> >   
> >   	reset_control_assert(qproc->mss_restart);
> > +
> > +	q6v5_clk_disable(qproc->dev, qproc->proxy_clks,
> > +			 qproc->proxy_clk_count);
> > +	q6v5_regulator_disable(qproc, qproc->proxy_regs,
> > +			       qproc->proxy_reg_count);
> > +
> >   	q6v5_clk_disable(qproc->dev, qproc->active_clks,
> >   			 qproc->active_clk_count);
> >   	q6v5_regulator_disable(qproc, qproc->active_regs,
> > @@ -959,7 +960,7 @@ static irqreturn_t q6v5_fatal_interrupt(int irq, void *dev)
> >   	return IRQ_HANDLED;
> >   }
> >   
> > -static irqreturn_t q6v5_handover_interrupt(int irq, void *dev)
> > +static irqreturn_t q6v5_ready_interrupt(int irq, void *dev)
> >   {
> >   	struct q6v5 *qproc = dev;
> >   
> > @@ -967,6 +968,18 @@ static irqreturn_t q6v5_handover_interrupt(int irq, void *dev)
> >   	return IRQ_HANDLED;
> >   }
> >   
> > +static irqreturn_t q6v5_handover_interrupt(int irq, void *dev)
> > +{
> > +	struct q6v5 *qproc = dev;
> > +
> > +	q6v5_clk_disable(qproc->dev, qproc->proxy_clks,
> > +			 qproc->proxy_clk_count);
> > +	q6v5_regulator_disable(qproc, qproc->proxy_regs,
> > +			       qproc->proxy_reg_count);
> > +
> > +	return IRQ_HANDLED;
> > +}
> > +
> >   static irqreturn_t q6v5_stop_ack_interrupt(int irq, void *dev)
> >   {
> >   	struct q6v5 *qproc = dev;
> > @@ -1194,6 +1207,10 @@ static int q6v5_probe(struct platform_device *pdev)
> >   	if (ret < 0)
> >   		goto free_rproc;
> >   
> > +	ret = q6v5_request_irq(qproc, pdev, "ready", q6v5_ready_interrupt);
> > +	if (ret < 0)
> > +		goto free_rproc;
> > +
> >   	ret = q6v5_request_irq(qproc, pdev, "handover", q6v5_handover_interrupt);
> >   	if (ret < 0)
> >   		goto free_rproc;
> > --
> > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> > a Linux Foundation Collaborative Project

--
Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc, is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
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