On Tue, Mar 28, 2023 at 09:31:58AM +0200, Krzysztof Kozlowski wrote:
> On 27/03/2023 18:14, Sumit Gupta wrote:
[...]
> > diff --git a/drivers/memory/tegra/tegra186-emc.c b/drivers/memory/tegra/tegra186-emc.c
[...]
> > @@ -158,6 +260,9 @@ static int tegra186_emc_probe(struct platform_device *pdev)
> > if (!emc)
> > return -ENOMEM;
> >
> > + platform_set_drvdata(pdev, emc);
> > + emc->dev = &pdev->dev;
>
> This patch looks like stiched from two or more patches... emc->dev does
> not look like new member of emc, thus why do you set in exisitng
> function in this patch? Why it wasn't needed before?
This looks like it may be leftover from some development. These two
lines exist in this driver a few lines further down. Either one pair
should be removed. I don't see why this would need to be moved, so
probably the above additions can just be dropped.
Thierry
> > emc->bpmp = tegra_bpmp_get(&pdev->dev);
> > if (IS_ERR(emc->bpmp))
> > return dev_err_probe(&pdev->dev, PTR_ERR(emc->bpmp), "failed to get BPMP\n");
> > @@ -236,6 +341,25 @@ static int tegra186_emc_probe(struct platform_device *pdev)
> > debugfs_create_file("max_rate", S_IRUGO | S_IWUSR, emc->debugfs.root,
> > emc, &tegra186_emc_debug_max_rate_fops);
> >
> > + mc = dev_get_drvdata(emc->dev->parent);
> > + if (mc && mc->soc->icc_ops) {
> > + /*
> > + * Initialize the ICC even if BPMP-FW doesn't support 'MRQ_BWMGR_INT'.
> > + * Use the flag 'mc->bwmgr_mrq_supported' within MC driver and return
> > + * EINVAL instead of passing the request to BPMP-FW later when the BW
> > + * request is made by client with 'icc_set_bw()' call.
> > + */
> > + err = tegra_emc_interconnect_init(emc);
> > + if (err)
> > + goto put_bpmp;
> > +
> > + if (tegra_bpmp_mrq_is_supported(emc->bpmp, MRQ_BWMGR_INT))
> > + mc->bwmgr_mrq_supported = true;
> > + else
> > +
>
> Drop blank line.
>
> > + dev_info(&pdev->dev, "MRQ_BWMGR_INT not present\n");
>
> And what user is supposed to do with this? Either make it descriptive or
> drop.
Agreed. I think we can just drop this. If the intention was to provide a
quick way for people to detect whether BWMGR is available or not, using
something from sysfs/debugfs would be preferable.
Thierry
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