| Message ID | 20240822224547.385095-8-ulf.hansson@linaro.org (mailing list archive) |
|---|---|
| State | Handled Elsewhere, archived |
| Headers | show |
| Series | OPP/pmdomain: Assign required_devs for required OPPs through genpd | expand |
On Fri, Aug 23, 2024 at 12:45:44AM GMT, Ulf Hansson wrote: > Rather than hooking up the PM domains through devm_pm_opp_attach_genpd() > and manage the device-link, let's avoid the boilerplate-code by converting > into devm_pm_domain_attach_list(). > > Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> > --- > > Changes in v3: > - Updated commitmsg. > - Converted to devm mangaged version of dev_pm_domain_attach_list() > > --- > drivers/gpu/drm/tegra/gr3d.c | 38 +++++++----------------------------- > 1 file changed, 7 insertions(+), 31 deletions(-) I'm not very familiar with most of the OPP bits in this driver, but it looks like the corresponding code is now in the core, so this seems fine: Acked-by: Thierry Reding <treding@nvidia.com> On a related note: we have two other case on Tegra where we attach to multiple PM domains (drivers/usb/host/xhci-tegra.c and drivers/usb/gadget/udc/tegra-xudc.c). Both of those don't use OPP, but I wonder if they could also be simplified using the new devm_pm_domain_attach_list() function? Thierry
On Fri, 23 Aug 2024 at 13:53, Thierry Reding <thierry.reding@gmail.com> wrote: > > On Fri, Aug 23, 2024 at 12:45:44AM GMT, Ulf Hansson wrote: > > Rather than hooking up the PM domains through devm_pm_opp_attach_genpd() > > and manage the device-link, let's avoid the boilerplate-code by converting > > into devm_pm_domain_attach_list(). > > > > Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> > > --- > > > > Changes in v3: > > - Updated commitmsg. > > - Converted to devm mangaged version of dev_pm_domain_attach_list() > > > > --- > > drivers/gpu/drm/tegra/gr3d.c | 38 +++++++----------------------------- > > 1 file changed, 7 insertions(+), 31 deletions(-) > > I'm not very familiar with most of the OPP bits in this driver, but it > looks like the corresponding code is now in the core, so this seems > fine: > > Acked-by: Thierry Reding <treding@nvidia.com> Thanks! > > On a related note: we have two other case on Tegra where we attach to > multiple PM domains (drivers/usb/host/xhci-tegra.c and > drivers/usb/gadget/udc/tegra-xudc.c). Both of those don't use OPP, but > I wonder if they could also be simplified using the new > devm_pm_domain_attach_list() function? Yes, they certainly can! I was planning to send a couple of patches simplifying a couple of more drivers here and there (including those on Tegra), but I haven't yet made it to it. If you do it before me, feel free to keep me on cc. Kind regards Uffe
diff --git a/drivers/gpu/drm/tegra/gr3d.c b/drivers/gpu/drm/tegra/gr3d.c index 00c8564520e7..d52433cf939a 100644 --- a/drivers/gpu/drm/tegra/gr3d.c +++ b/drivers/gpu/drm/tegra/gr3d.c @@ -46,6 +46,7 @@ struct gr3d { unsigned int nclocks; struct reset_control_bulk_data resets[RST_GR3D_MAX]; unsigned int nresets; + struct dev_pm_domain_list *pd_list; DECLARE_BITMAP(addr_regs, GR3D_NUM_REGS); }; @@ -369,18 +370,12 @@ static int gr3d_power_up_legacy_domain(struct device *dev, const char *name, return 0; } -static void gr3d_del_link(void *link) -{ - device_link_del(link); -} - static int gr3d_init_power(struct device *dev, struct gr3d *gr3d) { - static const char * const opp_genpd_names[] = { "3d0", "3d1", NULL }; - const u32 link_flags = DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME; - struct device **opp_virt_devs, *pd_dev; - struct device_link *link; - unsigned int i; + struct dev_pm_domain_attach_data pd_data = { + .pd_names = (const char *[]) { "3d0", "3d1" }, + .num_pd_names = 2, + }; int err; err = of_count_phandle_with_args(dev->of_node, "power-domains", @@ -414,29 +409,10 @@ static int gr3d_init_power(struct device *dev, struct gr3d *gr3d) if (dev->pm_domain) return 0; - err = devm_pm_opp_attach_genpd(dev, opp_genpd_names, &opp_virt_devs); - if (err) + err = devm_pm_domain_attach_list(dev, &pd_data, &gr3d->pd_list); + if (err < 0) return err; - for (i = 0; opp_genpd_names[i]; i++) { - pd_dev = opp_virt_devs[i]; - if (!pd_dev) { - dev_err(dev, "failed to get %s power domain\n", - opp_genpd_names[i]); - return -EINVAL; - } - - link = device_link_add(dev, pd_dev, link_flags); - if (!link) { - dev_err(dev, "failed to link to %s\n", dev_name(pd_dev)); - return -EINVAL; - } - - err = devm_add_action_or_reset(dev, gr3d_del_link, link); - if (err) - return err; - } - return 0; }
Rather than hooking up the PM domains through devm_pm_opp_attach_genpd() and manage the device-link, let's avoid the boilerplate-code by converting into devm_pm_domain_attach_list(). Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> --- Changes in v3: - Updated commitmsg. - Converted to devm mangaged version of dev_pm_domain_attach_list() --- drivers/gpu/drm/tegra/gr3d.c | 38 +++++++----------------------------- 1 file changed, 7 insertions(+), 31 deletions(-)