From 90393c9b5408cafededdee2f34082c4c3c671901 Mon Sep 17 00:00:00 2001 From: Philipp Stanner Date: Wed, 24 Jan 2024 12:19:04 +0100 Subject: [PATCH] drm/imx/dcss: request memory region 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 Reviewed-by: Laurentiu Palcu Signed-off-by: Laurentiu Palcu Link: https://patchwork.freedesktop.org/patch/msgid/20240124111904.18261-3-pstanner@redhat.com --- 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 4f3af0dfb3449..d448bf1c205e2 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); -- 2.30.2