[PATCH v3 1/2] drm/imx/dcss: request memory region
From: Philipp Stanner <hidden>
Date: 2024-01-11 10:14:52
Also in:
dri-devel, lkml
Subsystem:
drm drivers, drm drivers and misc gpu patches, nxp i.mx 8mq dcss driver, the rest · Maintainers:
David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Laurentiu Palcu, Linus Torvalds
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 <redacted> --- 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
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