Requesting the framebuffer memory in simpledrm marks the memory range as busy. This used to be done by the firmware sysfb code, but the driver is the correct place.
Signed-off-by: Thomas Zimmermann <[email protected]> --- drivers/gpu/drm/tiny/simpledrm.c | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c index 04146da2d1d8..f72b71511a65 100644 --- a/drivers/gpu/drm/tiny/simpledrm.c +++ b/drivers/gpu/drm/tiny/simpledrm.c @@ -526,21 +526,31 @@ static int simpledrm_device_init_mm(struct simpledrm_device *sdev) { struct drm_device *dev = &sdev->dev; struct platform_device *pdev = sdev->pdev; - struct resource *mem; + struct resource *res, *mem; void __iomem *screen_base; int ret; - mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!mem) + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) return -EINVAL; - ret = devm_aperture_acquire_from_firmware(dev, mem->start, resource_size(mem)); + ret = devm_aperture_acquire_from_firmware(dev, res->start, resource_size(res)); if (ret) { drm_err(dev, "could not acquire memory range %pr: error %d\n", - mem, ret); + res, ret); return ret; } + mem = devm_request_mem_region(&pdev->dev, res->start, resource_size(res), + sdev->dev.driver->name); + if (!mem) { + /* + * We cannot make this fatal. Sometimes this comes from magic + * spaces our resource handlers simply don't know about + */ + drm_warn(dev, "could not acquire memory region %pr\n", res); + } + screen_base = devm_ioremap_wc(&pdev->dev, mem->start, resource_size(mem)); if (!screen_base) -- 2.34.1
