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drm/imx/dcss: request memory region

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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@redhat.com>
Reviewed-by: Laurentiu Palcu <laurentiu.palcu@oss.nxp.com>
Signed-off-by: Laurentiu Palcu <laurentiu.palcu@oss.nxp.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240124111904.18261-3-pstanner@redhat.com
This commit is contained in:
Philipp Stanner 2024-01-24 12:19:04 +01:00 • committed by Laurentiu Palcu
parent 041261ac4c
commit 90393c9b54
1 changed files with 7 additions and 0 deletions
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7
drivers/gpu/drm/imx/dcss/dcss-dev.c
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@ -170,6 +170,7 @@ struct dcss_dev *dcss_dev_create(struct device *dev, bool hdmi_output)
struct resource *res; struct resource *res;
struct dcss_dev *dcss; struct dcss_dev *dcss;
const struct dcss_type_data *devtype; const struct dcss_type_data *devtype;
resource_size_t res_len;
devtype = of_device_get_match_data(dev); devtype = of_device_get_match_data(dev);
if (!devtype) { if (!devtype) {
@ -183,6 +184,12 @@ struct dcss_dev *dcss_dev_create(struct device *dev, bool hdmi_output)
return ERR_PTR(-EINVAL); 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); dcss = kzalloc(sizeof(*dcss), GFP_KERNEL);
if (!dcss) if (!dcss)
return ERR_PTR(-ENOMEM); return ERR_PTR(-ENOMEM);