diff options
| author | Michał Mirosław <mirq-linux@rere.qmqm.pl> | 2018-09-01 17:08:45 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2018-09-03 19:15:40 +0300 |
| commit | 4d18975c78f2d5c91792356501cf369e67594241 (patch) | |
| tree | 0952c365316ede5770f30afa8b5b808e7a0f6ae8 /drivers/video/fbdev | |
| parent | 69aa5355ab0da7a73ef95aff647a054590e48416 (diff) | |
| download | linux-4d18975c78f2d5c91792356501cf369e67594241.tar.xz | |
fbdev: add remove_conflicting_pci_framebuffers()
Almost all PCI drivers using remove_conflicting_framebuffers() wrap it
with the same code.
v2: add kerneldoc for DRM helper
v3: propagate remove_conflicting_framebuffers() return value
+ move kerneldoc to where function is implemented
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/7db1c278276de420eb45a1b71d06b5eb6bbd49ef.1535810304.git.mirq-linux@rere.qmqm.pl
Diffstat (limited to 'drivers/video/fbdev')
| -rw-r--r-- | drivers/video/fbdev/core/fbmem.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c index 6e9961b71442..5ffadc8e681d 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> @@ -1831,6 +1832,40 @@ int remove_conflicting_framebuffers(struct apertures_struct *a, EXPORT_SYMBOL(remove_conflicting_framebuffers); /** + * remove_conflicting_pci_framebuffers - remove firmware-configured framebuffers for PCI devices + * @pdev: PCI device + * @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 drives a primary + * display and so kicks out vga16fb. + */ +int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, int res_id, const char *name) +{ + struct apertures_struct *ap; + bool primary = false; + int err; + + 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 + err = remove_conflicting_framebuffers(ap, name, primary); + kfree(ap); + return err; +} +EXPORT_SYMBOL(remove_conflicting_pci_framebuffers); + +/** * register_framebuffer - registers a frame buffer device * @fb_info: frame buffer info structure * |