Signed-off-by: Tomeu Vizoso <[email protected]>
---
drivers/gpu/drm/tegra/dpaux.c | 24 ++++++++++++++++++++++++
drivers/gpu/drm/tegra/drm.h | 9 +++++++++
2 files changed, 33 insertions(+)
diff --git a/drivers/gpu/drm/tegra/dpaux.c b/drivers/gpu/drm/tegra/dpaux.c
index 07b26972f487..512322c58c43 100644
--- a/drivers/gpu/drm/tegra/dpaux.c
+++ b/drivers/gpu/drm/tegra/dpaux.c
@@ -569,3 +569,27 @@ int tegra_dpaux_train(struct tegra_dpaux *dpaux, struct
drm_dp_link *link,
return 0;
}
+
+int devm_acquire_tegra_dpaux(struct device *dev,
+ const struct devm_resource *resource)
+{
+ struct device_node *np;
+ struct tegra_dpaux *dpaux, **dpauxp;
+
+ np = of_parse_phandle(dev->of_node, resource->name, 0);
+ if (!np)
+ return 0;
+
+ dpaux = tegra_dpaux_find_by_of_node(np);
+ of_node_put(np);
+
+ dev_warn(dev, "dpaux device '%s' not probed yet\n",
of_node_full_name(np));
+
+ if (!dpaux)
+ return -EPROBE_DEFER;
+
+ dpauxp = dev_get_drvdata(dev) + resource->offset;
+ *dpauxp = dpaux;
+
+ return 0;
+}
diff --git a/drivers/gpu/drm/tegra/drm.h b/drivers/gpu/drm/tegra/drm.h
index 659b2fcc986d..70930d262caf 100644
--- a/drivers/gpu/drm/tegra/drm.h
+++ b/drivers/gpu/drm/tegra/drm.h
@@ -250,6 +250,15 @@ int tegra_dpaux_prepare(struct tegra_dpaux *dpaux, u8
encoding);
int tegra_dpaux_train(struct tegra_dpaux *dpaux, struct drm_dp_link *link,
u8 pattern);
+int devm_acquire_tegra_dpaux(struct device *dev,
+ const struct devm_resource *resource);
+
+#define DEVM_TEGRA_DPAUX(_struct, _member, _name) { \
+ .initfunc = devm_acquire_tegra_dpaux, \
+ .offset = offsetof_t(struct _struct, _member, struct tegra_dpaux *),\
+ .name = _name, \
+}
+
/* from fb.c */
struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
unsigned int index);
--
2.4.3
--
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