diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.c | 10 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_drm.c | 10 | ||||
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_drv.c | 10 | ||||
| -rw-r--r-- | drivers/gpu/vga/vga_switcheroo.c | 29 | ||||
| -rw-r--r-- | include/linux/vga_switcheroo.h | 2 |
5 files changed, 33 insertions, 28 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index d37c0a671eed..20d58987381d 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -35,11 +35,9 @@ #include "i915_trace.h" #include "intel_drv.h" -#include <linux/apple-gmux.h> #include <linux/console.h> #include <linux/module.h> #include <linux/pm_runtime.h> -#include <linux/vgaarb.h> #include <linux/vga_switcheroo.h> #include <drm/drm_crtc_helper.h> @@ -1025,13 +1023,7 @@ static int i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (PCI_FUNC(pdev->devfn)) return -ENODEV; - /* - * apple-gmux is needed on dual GPU MacBook Pro - * to probe the panel if we're the inactive GPU. - */ - if (IS_ENABLED(CONFIG_VGA_ARB) && IS_ENABLED(CONFIG_VGA_SWITCHEROO) && - apple_gmux_present() && pdev != vga_default_device() && - !vga_switcheroo_handler_flags()) + if (vga_switcheroo_client_probe_defer(pdev)) return -EPROBE_DEFER; return drm_get_pci_dev(pdev, ent, &driver); diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c index 11f8dd9c0edb..5c4d4dff2da8 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drm.c +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c @@ -22,13 +22,11 @@ * Authors: Ben Skeggs */ -#include <linux/apple-gmux.h> #include <linux/console.h> #include <linux/delay.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/pm_runtime.h> -#include <linux/vgaarb.h> #include <linux/vga_switcheroo.h> #include "drmP.h" @@ -315,13 +313,7 @@ static int nouveau_drm_probe(struct pci_dev *pdev, bool boot = false; int ret; - /* - * apple-gmux is needed on dual GPU MacBook Pro - * to probe the panel if we're the inactive GPU. - */ - if (IS_ENABLED(CONFIG_VGA_ARB) && IS_ENABLED(CONFIG_VGA_SWITCHEROO) && - apple_gmux_present() && pdev != vga_default_device() && - !vga_switcheroo_handler_flags()) + if (vga_switcheroo_client_probe_defer(pdev)) return -EPROBE_DEFER; /* remove conflicting drivers (vesafb, efifb etc) */ diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c index b55aa740171f..a455dc7d4aa1 100644 --- a/drivers/gpu/drm/radeon/radeon_drv.c +++ b/drivers/gpu/drm/radeon/radeon_drv.c @@ -34,11 +34,9 @@ #include "radeon_drv.h" #include <drm/drm_pciids.h> -#include <linux/apple-gmux.h> #include <linux/console.h> #include <linux/module.h> #include <linux/pm_runtime.h> -#include <linux/vgaarb.h> #include <linux/vga_switcheroo.h> #include <drm/drm_gem.h> @@ -340,13 +338,7 @@ static int radeon_pci_probe(struct pci_dev *pdev, if (ret == -EPROBE_DEFER) return ret; - /* - * apple-gmux is needed on dual GPU MacBook Pro - * to probe the panel if we're the inactive GPU. - */ - if (IS_ENABLED(CONFIG_VGA_ARB) && IS_ENABLED(CONFIG_VGA_SWITCHEROO) && - apple_gmux_present() && pdev != vga_default_device() && - !vga_switcheroo_handler_flags()) + if (vga_switcheroo_client_probe_defer(pdev)) return -EPROBE_DEFER; /* Get rid of things like offb */ diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c index cbd7c986d926..d349bf91dd11 100644 --- a/drivers/gpu/vga/vga_switcheroo.c +++ b/drivers/gpu/vga/vga_switcheroo.c @@ -30,6 +30,7 @@ #define pr_fmt(fmt) "vga_switcheroo: " fmt +#include <linux/apple-gmux.h> #include <linux/console.h> #include <linux/debugfs.h> #include <linux/fb.h> @@ -308,7 +309,8 @@ static int register_client(struct pci_dev *pdev, * * Register vga client (GPU). Enable vga_switcheroo if another GPU and a * handler have already registered. The power state of the client is assumed - * to be ON. + * to be ON. Beforehand, vga_switcheroo_client_probe_defer() shall be called + * to ensure that all prerequisites are met. * * Return: 0 on success, -ENOMEM on memory allocation error. */ @@ -376,6 +378,31 @@ find_active_client(struct list_head *head) } /** + * vga_switcheroo_client_probe_defer() - whether to defer probing a given client + * @pdev: client pci device + * + * Determine whether any prerequisites are not fulfilled to probe a given + * client. Drivers shall invoke this early on in their ->probe callback + * and return %-EPROBE_DEFER if it evaluates to %true. Thou shalt not + * register the client ere thou hast called this. + * + * Return: %true if probing should be deferred, otherwise %false. + */ +bool vga_switcheroo_client_probe_defer(struct pci_dev *pdev) +{ + /* + * apple-gmux is needed on pre-retina MacBook Pro + * to probe the panel if pdev is the inactive GPU. + */ + if (apple_gmux_present() && pdev != vga_default_device() && + !vgasr_priv.handler_flags) + return true; + + return false; +} +EXPORT_SYMBOL(vga_switcheroo_client_probe_defer); + +/** * vga_switcheroo_get_client_state() - obtain power state of a given client * @pdev: client pci device * diff --git a/include/linux/vga_switcheroo.h b/include/linux/vga_switcheroo.h index b39a5f3153bd..960bedbdec87 100644 --- a/include/linux/vga_switcheroo.h +++ b/include/linux/vga_switcheroo.h @@ -165,6 +165,7 @@ int vga_switcheroo_unlock_ddc(struct pci_dev *pdev); int vga_switcheroo_process_delayed_switch(void); +bool vga_switcheroo_client_probe_defer(struct pci_dev *pdev); enum vga_switcheroo_state vga_switcheroo_get_client_state(struct pci_dev *dev); void vga_switcheroo_set_dynamic_switch(struct pci_dev *pdev, enum vga_switcheroo_state dynamic); @@ -188,6 +189,7 @@ static inline enum vga_switcheroo_handler_flags_t vga_switcheroo_handler_flags(v static inline int vga_switcheroo_lock_ddc(struct pci_dev *pdev) { return -ENODEV; } static inline int vga_switcheroo_unlock_ddc(struct pci_dev *pdev) { return -ENODEV; } static inline int vga_switcheroo_process_delayed_switch(void) { return 0; } +static inline bool vga_switcheroo_client_probe_defer(struct pci_dev *pdev) { return false; } static inline enum vga_switcheroo_state vga_switcheroo_get_client_state(struct pci_dev *dev) { return VGA_SWITCHEROO_ON; } static inline void vga_switcheroo_set_dynamic_switch(struct pci_dev *pdev, enum vga_switcheroo_state dynamic) {} |