Almost all PCI drivers using remove_conflicting_framebuffers() wrap it with the same code.
Signed-off-by: Michał Mirosław mirq-linux@rere.qmqm.pl [for v1] Acked-by: Bartlomiej Zolnierkiewicz b.zolnierkie@samsung.com
--- v2: add kerneldoc for DRM helper --- drivers/video/fbdev/core/fbmem.c | 22 ++++++++++++++++++++++ include/drm/drm_fb_helper.h | 24 ++++++++++++++++++++++++ include/linux/fb.h | 2 ++ 3 files changed, 48 insertions(+)
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c index 0df148eb4699..927e016487e9 100644 --- a/drivers/video/fbdev/core/fbmem.c +++ b/drivers/video/fbdev/core/fbmem.c @@ -34,6 +34,7 @@ #include <linux/fb.h> #include <linux/fbcon.h> #include <linux/mem_encrypt.h> +#include <linux/pci.h>
#include <asm/fb.h>
@@ -1802,6 +1803,27 @@ int remove_conflicting_framebuffers(struct apertures_struct *a, } EXPORT_SYMBOL(remove_conflicting_framebuffers);
+int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, int res_id, const char *name) +{ + struct apertures_struct *ap; + bool primary = false; + + ap = alloc_apertures(1); + if (!ap) + return -ENOMEM; + + ap->ranges[0].base = pci_resource_start(pdev, res_id); + ap->ranges[0].size = pci_resource_len(pdev, res_id); +#ifdef CONFIG_X86 + primary = pdev->resource[PCI_ROM_RESOURCE].flags & + IORESOURCE_ROM_SHADOW; +#endif + remove_conflicting_framebuffers(ap, name, primary); + kfree(ap); + return 0; +} +EXPORT_SYMBOL(remove_conflicting_pci_framebuffers); + /** * register_framebuffer - registers a frame buffer device * @fb_info: frame buffer info structure diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h index 1c1e53abb25d..6e1fc52d1b1b 100644 --- a/include/drm/drm_fb_helper.h +++ b/include/drm/drm_fb_helper.h @@ -587,4 +587,28 @@ drm_fb_helper_remove_conflicting_framebuffers(struct apertures_struct *a, #endif }
+/** + * drm_fb_helper_remove_conflicting_framebuffers - remove firmware framebuffers for PCI devices + * @pdev: PCI device being driven + * @resource_id: index of PCI BAR configuring framebuffer memory + * @name: requesting driver name + * + * This function removes framebuffer devices (eg. initialized by firmware) + * using memory range configured for @pdev's BAR @resource_id. + * + * The function assumes that PCI device with shadowed ROM is drives a primary + * display and so kicks out vga16fb. + */ +static inline int +drm_fb_helper_remove_conflicting_pci_framebuffers(struct pci_dev *pdev, + int resource_id, + const char *name) +{ +#if IS_REACHABLE(CONFIG_FB) + return remove_conflicting_pci_framebuffers(pdev, resource_id, name); +#else + return 0; +#endif +} + #endif diff --git a/include/linux/fb.h b/include/linux/fb.h index aa74a228bb92..abeffd55b66a 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -632,6 +632,8 @@ extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf, extern int register_framebuffer(struct fb_info *fb_info); extern int unregister_framebuffer(struct fb_info *fb_info); extern int unlink_framebuffer(struct fb_info *fb_info); +extern int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, int res_id, + const char *name); extern int remove_conflicting_framebuffers(struct apertures_struct *a, const char *name, bool primary); extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);