video: tegra: host: Export subdomain registration

This far the subdomain registration has been allowed for drivers that
use nvhost_acm framework. However, gk20a handles its own power domain bu
it needs to register it as a subdomain of host1x. This patch exports
necessary functionality in public header.

Bug 200003112

Change-Id: Ie3457345c101329cadac4ef8aa71e448629a419b
Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Reviewed-on: http://git-master/r/407002
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Mitch Luban <mluban@nvidia.com>
GVS: Gerrit_Virtual_Submit

diff --git a/drivers/video/tegra/host/nvhost_acm.c b/drivers/video/tegra/host/nvhost_acm.c
index ebbaf119aa7a45c63b0f902446b4db2c8757a772..cd02f20ea0068f0f60f6867444ef30d188a536bc 100644 (file)
--- a/drivers/video/tegra/host/nvhost_acm.c
+++ b/drivers/video/tegra/host/nvhost_acm.c
@@ -719,6 +719,12 @@ int _nvhost_module_add_domain(struct generic_pm_domain *domain,
        return ret;
 }
 
+void nvhost_register_client_domain(struct generic_pm_domain *domain)
+{
+       pm_genpd_add_subdomain(host1x_domain, domain);
+}
+EXPORT_SYMBOL(nvhost_register_client_domain);
+
 /* common runtime pm and power domain APIs */
 int nvhost_module_add_domain(struct generic_pm_domain *domain,
        struct platform_device *pdev)

diff --git a/include/linux/nvhost.h b/include/linux/nvhost.h
index 46faeca981e25ac01b02f6ad69a37010a2e57876..40dbc6f2a7057c00af1429beae64d370ae96db44 100644 (file)
--- a/include/linux/nvhost.h
+++ b/include/linux/nvhost.h
@@ -325,6 +325,9 @@ bool nvhost_module_powered_ext(struct platform_device *dev);
 int nvhost_module_busy_ext(struct platform_device *dev);
 void nvhost_module_idle_ext(struct platform_device *dev);
 
+/* public api to register a subdomain */
+void nvhost_register_client_domain(struct generic_pm_domain *domain);
+
 /* public host1x sync-point management APIs */
 u32 nvhost_syncpt_incr_max_ext(struct platform_device *dev, u32 id, u32 incrs);
 void nvhost_syncpt_cpu_incr_ext(struct platform_device *dev, u32 id);