The driver's memory regions are currently just ioremap()ed, but not
reserved through a request. That's not a bug, but having the request is
a little more robust.
Implement the region-request through the corresponding managed
devres-function.
Signed-off-by: Philipp Stanner <pstanner@xxxxxxxxxx>
---
drivers/gpu/drm/imx/dcss/dcss-dev.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/imx/dcss/dcss-dev.c b/drivers/gpu/drm/imx/dcss/dcss-dev.c
index 4f3af0dfb344..d448bf1c205e 100644
--- a/drivers/gpu/drm/imx/dcss/dcss-dev.c
+++ b/drivers/gpu/drm/imx/dcss/dcss-dev.c
@@ -170,6 +170,7 @@ struct dcss_dev *dcss_dev_create(struct device *dev, bool hdmi_output)
struct resource *res;
struct dcss_dev *dcss;
const struct dcss_type_data *devtype;
+ resource_size_t res_len;
devtype = of_device_get_match_data(dev);
if (!devtype) {
@@ -183,6 +184,12 @@ struct dcss_dev *dcss_dev_create(struct device *dev, bool hdmi_output)
return ERR_PTR(-EINVAL);
}
+ res_len = res->end - res->start;
+ if (!devm_request_mem_region(dev, res->start, res_len, "dcss")) {
+ dev_err(dev, "cannot request memory region\n");
+ return ERR_PTR(-EBUSY);
+ }
+
dcss = kzalloc(sizeof(*dcss), GFP_KERNEL);
if (!dcss)
return ERR_PTR(-ENOMEM);
--
2.43.0
