drm: add driver->set_busid() callback

One step closer to dropping all the drm_bus_* code:
Add a driver->set_busid() callback and make all drivers use the generic
helpers. Nouveau is the only driver that uses two different bus-types with
the same drm_driver. This is totally broken if both buses are available on
the same machine (unlikely, but lets be safe). Therefore, we create two
different drivers for each platform during module_init() and set the
set_busid() callback respectively.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

30 files changed, 59 insertions, 9 deletions

diff --git a/drivers/gpu/drm/armada/armada_drv.c b/drivers/gpu/drm/armada/armada_drv.c
index e2d5792b140f..f672e6ad8afa 100644
--- a/drivers/gpu/drm/armada/armada_drv.c
+++ b/drivers/gpu/drm/armada/armada_drv.c
@@ -308,6 +308,7 @@ static struct drm_driver armada_drm_driver = {
         .postclose              = NULL,
         .lastclose              = armada_drm_lastclose,
         .unload                 = armada_drm_unload,
+        .set_busid              = drm_platform_set_busid,
         .get_vblank_counter     = drm_vblank_count,
         .enable_vblank          = armada_drm_enable_vblank,
         .disable_vblank         = armada_drm_disable_vblank,
diff --git a/drivers/gpu/drm/ast/ast_drv.c b/drivers/gpu/drm/ast/ast_drv.c
index f19682a93c24..9a32d9dfdd26 100644
--- a/drivers/gpu/drm/ast/ast_drv.c
+++ b/drivers/gpu/drm/ast/ast_drv.c
@@ -199,6 +199,7 @@ static struct drm_driver driver = {
 
         .load = ast_driver_load,
         .unload = ast_driver_unload,
+        .set_busid = drm_pci_set_busid,
 
         .fops = &ast_fops,
         .name = DRIVER_NAME,
diff --git a/drivers/gpu/drm/bochs/bochs_drv.c b/drivers/gpu/drm/bochs/bochs_drv.c
index 9738e9b14708..98837bde2d25 100644
--- a/drivers/gpu/drm/bochs/bochs_drv.c
+++ b/drivers/gpu/drm/bochs/bochs_drv.c
@@ -82,6 +82,7 @@ static struct drm_driver bochs_driver = {
         .driver_features        = DRIVER_GEM | DRIVER_MODESET,
         .load                   = bochs_load,
         .unload                 = bochs_unload,
+        .set_busid              = drm_pci_set_busid,
         .fops                   = &bochs_fops,
         .name                   = "bochs-drm",
         .desc                   = "bochs dispi vga interface (qemu stdvga)",
diff --git a/drivers/gpu/drm/cirrus/cirrus_drv.c b/drivers/gpu/drm/cirrus/cirrus_drv.c
index 919c73b94447..e705335101a5 100644
--- a/drivers/gpu/drm/cirrus/cirrus_drv.c
+++ b/drivers/gpu/drm/cirrus/cirrus_drv.c
@@ -128,6 +128,7 @@ static struct drm_driver driver = {
         .driver_features = DRIVER_MODESET | DRIVER_GEM,
         .load = cirrus_driver_load,
         .unload = cirrus_driver_unload,
+        .set_busid = drm_pci_set_busid,
         .fops = &cirrus_driver_fops,
         .name = DRIVER_NAME,
         .desc = DRIVER_DESC,
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index cb6b54aebd6f..4770bd78b307 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -244,7 +244,13 @@ static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
         if (master->unique != NULL)
                 drm_unset_busid(dev, master);
 
-        if (dev->driver->bus && dev->driver->bus->set_busid) {
+        if (dev->driver->set_busid) {
+                ret = dev->driver->set_busid(dev, master);
+                if (ret) {
+                        drm_unset_busid(dev, master);
+                        return ret;
+                }
+        } else if (dev->driver->bus && dev->driver->bus->set_busid) {
                 ret = dev->driver->bus->set_busid(dev, master);
                 if (ret) {
                         drm_unset_busid(dev, master);
diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c
index e266927bb9f1..0400c371cbde 100644
--- a/drivers/gpu/drm/drm_pci.c
+++ b/drivers/gpu/drm/drm_pci.c
@@ -127,7 +127,7 @@ static int drm_get_pci_domain(struct drm_device *dev)
         return pci_domain_nr(dev->pdev->bus);
 }
 
-static int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
+int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
 {
         master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d",
                                         drm_get_pci_domain(dev),
@@ -140,6 +140,7 @@ static int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
         master->unique_len = strlen(master->unique);
         return 0;
 }
+EXPORT_SYMBOL(drm_pci_set_busid);
 
 int drm_pci_set_unique(struct drm_device *dev,
                        struct drm_master *master,
diff --git a/drivers/gpu/drm/drm_platform.c b/drivers/gpu/drm/drm_platform.c
index f197a2b6911a..939cd2272b91 100644
--- a/drivers/gpu/drm/drm_platform.c
+++ b/drivers/gpu/drm/drm_platform.c
@@ -68,7 +68,7 @@ err_free:
         return ret;
 }
 
-static int drm_platform_set_busid(struct drm_device *dev, struct drm_master *master)
+int drm_platform_set_busid(struct drm_device *dev, struct drm_master *master)
 {
         int id;
 
@@ -84,6 +84,7 @@ static int drm_platform_set_busid(struct drm_device *dev, struct drm_master *mas
         master->unique_len = strlen(master->unique);
         return 0;
 }
+EXPORT_SYMBOL(drm_platform_set_busid);
 
 static struct drm_bus drm_platform_bus = {
         .set_busid = drm_platform_set_busid,
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index 0d74e9b99c4e..5aae95cf5b23 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -330,6 +330,7 @@ static struct drm_driver exynos_drm_driver = {
         .preclose               = exynos_drm_preclose,
         .lastclose              = exynos_drm_lastclose,
         .postclose              = exynos_drm_postclose,
+        .set_busid              = drm_platform_set_busid,
         .get_vblank_counter     = drm_vblank_count,
         .enable_vblank          = exynos_drm_crtc_enable_vblank,
         .disable_vblank         = exynos_drm_crtc_disable_vblank,
diff --git a/drivers/gpu/drm/gma500/psb_drv.c b/drivers/gpu/drm/gma500/psb_drv.c
index eec993f93b1a..6ec3a905fdd2 100644
--- a/drivers/gpu/drm/gma500/psb_drv.c
+++ b/drivers/gpu/drm/gma500/psb_drv.c
@@ -476,6 +476,7 @@ static struct drm_driver driver = {
         .unload = psb_driver_unload,
         .lastclose = psb_driver_lastclose,
         .preclose = psb_driver_preclose,
+        .set_busid = drm_pci_set_busid,
 
         .num_ioctls = ARRAY_SIZE(psb_ioctls),
         .device_is_agp = psb_driver_device_is_agp,
diff --git a/drivers/gpu/drm/i810/i810_drv.c b/drivers/gpu/drm/i810/i810_drv.c
index 441ccf8f5bdc..6cb08a1c6b62 100644
--- a/drivers/gpu/drm/i810/i810_drv.c
+++ b/drivers/gpu/drm/i810/i810_drv.c
@@ -63,6 +63,7 @@ static struct drm_driver driver = {
         .load = i810_driver_load,
         .lastclose = i810_driver_lastclose,
         .preclose = i810_driver_preclose,
+        .set_busid = drm_pci_set_busid,
         .device_is_agp = i810_driver_device_is_agp,
         .dma_quiescent = i810_driver_dma_quiescent,
         .ioctls = i810_ioctls,
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index ff4db249cc72..cdd95956811d 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1593,6 +1593,7 @@ static struct drm_driver driver = {
         .lastclose = i915_driver_lastclose,
         .preclose = i915_driver_preclose,
         .postclose = i915_driver_postclose,
+        .set_busid = drm_pci_set_busid,
 
         /* Used in place of i915_pm_ops for non-DRIVER_MODESET */
         .suspend = i915_suspend,
diff --git a/drivers/gpu/drm/mga/mga_drv.c b/drivers/gpu/drm/mga/mga_drv.c
index 6b1a87c8aac5..cb5c71f4b28e 100644
--- a/drivers/gpu/drm/mga/mga_drv.c
+++ b/drivers/gpu/drm/mga/mga_drv.c
@@ -64,6 +64,7 @@ static struct drm_driver driver = {
         .load = mga_driver_load,
         .unload = mga_driver_unload,
         .lastclose = mga_driver_lastclose,
+        .set_busid = drm_pci_set_busid,
         .dma_quiescent = mga_driver_dma_quiescent,
         .device_is_agp = mga_driver_device_is_agp,
         .get_vblank_counter = mga_get_vblank_counter,
diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c b/drivers/gpu/drm/mgag200/mgag200_drv.c
index 2d75d6df0789..97745991544d 100644
--- a/drivers/gpu/drm/mgag200/mgag200_drv.c
+++ b/drivers/gpu/drm/mgag200/mgag200_drv.c
@@ -91,6 +91,7 @@ static struct drm_driver driver = {
         .driver_features = DRIVER_GEM | DRIVER_MODESET,
         .load = mgag200_driver_load,
         .unload = mgag200_driver_unload,
+        .set_busid = drm_pci_set_busid,
         .fops = &mgag200_driver_fops,
         .name = DRIVER_NAME,
         .desc = DRIVER_DESC,
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index b447c01ad89c..47ccdbf49fa1 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -836,6 +836,7 @@ static struct drm_driver msm_driver = {
         .open               = msm_open,
         .preclose           = msm_preclose,
         .lastclose          = msm_lastclose,
+        .set_busid          = drm_platform_set_busid,
         .irq_handler        = msm_irq,
         .irq_preinstall     = msm_irq_preinstall,
         .irq_postinstall    = msm_irq_postinstall,
diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
index 250a5e88c751..cee1eaf64117 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -73,7 +73,9 @@ MODULE_PARM_DESC(runpm, "disable (0), force enable (1), optimus only default (-1
 int nouveau_runtime_pm = -1;
 module_param_named(runpm, nouveau_runtime_pm, int, 0400);
 
-static struct drm_driver driver;
+static struct drm_driver driver_stub;
+static struct drm_driver driver_pci;
+static struct drm_driver driver_platform;
 
 static u64
 nouveau_pci_name(struct pci_dev *pdev)
@@ -322,7 +324,7 @@ static int nouveau_drm_probe(struct pci_dev *pdev,
 
         pci_set_master(pdev);
 
-        ret = drm_get_pci_dev(pdev, pent, &driver);
+        ret = drm_get_pci_dev(pdev, pent, &driver_pci);
         if (ret) {
                 nouveau_object_ref(NULL, (struct nouveau_object **)&device);
                 return ret;
@@ -855,7 +857,7 @@ nouveau_driver_fops = {
 };
 
 static struct drm_driver
-driver = {
+driver_stub = {
         .driver_features =
                 DRIVER_USE_AGP |
                 DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_RENDER,
@@ -1061,7 +1063,7 @@ nouveau_platform_device_create_(struct platform_device *pdev, int size,
         if (err)
                 return ERR_PTR(err);
 
-        drm = drm_dev_alloc(&driver, &pdev->dev);
+        drm = drm_dev_alloc(&driver_platform, &pdev->dev);
         if (!drm) {
                 err = -ENOMEM;
                 goto err_free;
@@ -1086,6 +1088,11 @@ EXPORT_SYMBOL(nouveau_platform_device_create_);
 static int __init
 nouveau_drm_init(void)
 {
+        driver_pci = driver_stub;
+        driver_pci.set_busid = drm_pci_set_busid;
+        driver_platform = driver_stub;
+        driver_platform.set_busid = drm_platform_set_busid;
+
         if (nouveau_modeset == -1) {
 #ifdef CONFIG_VGA_CONSOLE
                 if (vgacon_text_force())
@@ -1097,7 +1104,7 @@ nouveau_drm_init(void)
                 return 0;
 
         nouveau_register_dsm_handler();
-        return drm_pci_init(&driver, &nouveau_drm_pci_driver);
+        return drm_pci_init(&driver_pci, &nouveau_drm_pci_driver);
 }
 
 static void __exit
@@ -1106,7 +1113,7 @@ nouveau_drm_exit(void)
         if (!nouveau_modeset)
                 return;
 
-        drm_pci_exit(&driver, &nouveau_drm_pci_driver);
+        drm_pci_exit(&driver_pci, &nouveau_drm_pci_driver);
         nouveau_unregister_dsm_handler();
 }
 
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 002b9721e85a..862ba03c236c 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -629,6 +629,7 @@ static struct drm_driver omap_drm_driver = {
                 .lastclose = dev_lastclose,
                 .preclose = dev_preclose,
                 .postclose = dev_postclose,
+                .set_busid = drm_platform_set_busid,
                 .get_vblank_counter = drm_vblank_count,
                 .enable_vblank = omap_irq_enable_vblank,
                 .disable_vblank = omap_irq_disable_vblank,
diff --git a/drivers/gpu/drm/qxl/qxl_drv.c b/drivers/gpu/drm/qxl/qxl_drv.c
index 4da0105e481a..1d9b80c91a15 100644
--- a/drivers/gpu/drm/qxl/qxl_drv.c
+++ b/drivers/gpu/drm/qxl/qxl_drv.c
@@ -235,6 +235,8 @@ static struct drm_driver qxl_driver = {
         .enable_vblank = qxl_noop_enable_vblank,
         .disable_vblank = qxl_noop_disable_vblank,
 
+        .set_busid = drm_pci_set_busid,
+
         .dumb_create = qxl_mode_dumb_create,
         .dumb_map_offset = qxl_mode_dumb_mmap,
         .dumb_destroy = drm_gem_dumb_destroy,
diff --git a/drivers/gpu/drm/r128/r128_drv.c b/drivers/gpu/drm/r128/r128_drv.c
index 5bd307cd8da1..4a59370eb580 100644
--- a/drivers/gpu/drm/r128/r128_drv.c
+++ b/drivers/gpu/drm/r128/r128_drv.c
@@ -62,6 +62,7 @@ static struct drm_driver driver = {
         .load = r128_driver_load,
         .preclose = r128_driver_preclose,
         .lastclose = r128_driver_lastclose,
+        .set_busid = drm_pci_set_busid,
         .get_vblank_counter = r128_get_vblank_counter,
         .enable_vblank = r128_enable_vblank,
         .disable_vblank = r128_disable_vblank,
diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
index f1e96e094b00..ec7e963d9bf7 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -328,6 +328,7 @@ static struct drm_driver driver_old = {
         .preclose = radeon_driver_preclose,
         .postclose = radeon_driver_postclose,
         .lastclose = radeon_driver_lastclose,
+        .set_busid = drm_pci_set_busid,
         .unload = radeon_driver_unload,
         .suspend = radeon_suspend,
         .resume = radeon_resume,
@@ -551,6 +552,7 @@ static struct drm_driver kms_driver = {
         .preclose = radeon_driver_preclose_kms,
         .postclose = radeon_driver_postclose_kms,
         .lastclose = radeon_driver_lastclose_kms,
+        .set_busid = drm_pci_set_busid,
         .unload = radeon_driver_unload_kms,
         .get_vblank_counter = radeon_get_vblank_counter_kms,
         .enable_vblank = radeon_enable_vblank_kms,
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
index fda64b7b73e8..672d2fcba009 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
@@ -158,6 +158,7 @@ static struct drm_driver rcar_du_driver = {
         .unload                 = rcar_du_unload,
         .preclose               = rcar_du_preclose,
         .lastclose              = rcar_du_lastclose,
+        .set_busid              = drm_platform_set_busid,
         .get_vblank_counter     = drm_vblank_count,
         .enable_vblank          = rcar_du_enable_vblank,
         .disable_vblank         = rcar_du_disable_vblank,
diff --git a/drivers/gpu/drm/savage/savage_drv.c b/drivers/gpu/drm/savage/savage_drv.c
index 3c030216e888..1b09d2182037 100644
--- a/drivers/gpu/drm/savage/savage_drv.c
+++ b/drivers/gpu/drm/savage/savage_drv.c
@@ -57,6 +57,7 @@ static struct drm_driver driver = {
         .preclose = savage_reclaim_buffers,
         .lastclose = savage_driver_lastclose,
         .unload = savage_driver_unload,
+        .set_busid = drm_pci_set_busid,
         .ioctls = savage_ioctls,
         .dma_ioctl = savage_bci_buffers,
         .fops = &savage_driver_fops,
diff --git a/drivers/gpu/drm/shmobile/shmob_drm_drv.c b/drivers/gpu/drm/shmobile/shmob_drm_drv.c
index ff4ba483b602..873d12f851bf 100644
--- a/drivers/gpu/drm/shmobile/shmob_drm_drv.c
+++ b/drivers/gpu/drm/shmobile/shmob_drm_drv.c
@@ -267,6 +267,7 @@ static struct drm_driver shmob_drm_driver = {
         .load                   = shmob_drm_load,
         .unload                 = shmob_drm_unload,
         .preclose               = shmob_drm_preclose,
+        .set_busid              = drm_platform_set_busid,
         .irq_handler            = shmob_drm_irq,
         .get_vblank_counter     = drm_vblank_count,
         .enable_vblank          = shmob_drm_enable_vblank,
diff --git a/drivers/gpu/drm/sis/sis_drv.c b/drivers/gpu/drm/sis/sis_drv.c
index 756f787b7143..54858e6fedaf 100644
--- a/drivers/gpu/drm/sis/sis_drv.c
+++ b/drivers/gpu/drm/sis/sis_drv.c
@@ -108,6 +108,7 @@ static struct drm_driver driver = {
         .open = sis_driver_open,
         .preclose = sis_reclaim_buffers_locked,
         .postclose = sis_driver_postclose,
+        .set_busid = drm_pci_set_busid,
         .dma_quiescent = sis_idle,
         .lastclose = sis_lastclose,
         .ioctls = sis_ioctls,
diff --git a/drivers/gpu/drm/tdfx/tdfx_drv.c b/drivers/gpu/drm/tdfx/tdfx_drv.c
index 3492ca5c46d3..df533ff999a4 100644
--- a/drivers/gpu/drm/tdfx/tdfx_drv.c
+++ b/drivers/gpu/drm/tdfx/tdfx_drv.c
@@ -55,6 +55,7 @@ static const struct file_operations tdfx_driver_fops = {
 };
 
 static struct drm_driver driver = {
+        .set_busid = drm_pci_set_busid,
         .fops = &tdfx_driver_fops,
         .name = DRIVER_NAME,
         .desc = DRIVER_DESC,
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
index 6be623b4a86f..aea4b7663934 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
@@ -502,6 +502,7 @@ static struct drm_driver tilcdc_driver = {
         .unload             = tilcdc_unload,
         .preclose           = tilcdc_preclose,
         .lastclose          = tilcdc_lastclose,
+        .set_busid          = drm_platform_set_busid,
         .irq_handler        = tilcdc_irq,
         .irq_preinstall     = tilcdc_irq_preinstall,
         .irq_postinstall    = tilcdc_irq_postinstall,
diff --git a/drivers/gpu/drm/udl/udl_drv.c b/drivers/gpu/drm/udl/udl_drv.c
index 3ddd6cd98ac1..06675e5d4342 100644
--- a/drivers/gpu/drm/udl/udl_drv.c
+++ b/drivers/gpu/drm/udl/udl_drv.c
@@ -34,6 +34,11 @@ MODULE_DEVICE_TABLE(usb, id_table);
 
 MODULE_LICENSE("GPL");
 
+static int udl_driver_set_busid(struct drm_device *d, struct drm_master *m)
+{
+        return 0;
+}
+
 static int udl_usb_probe(struct usb_interface *interface,
                          const struct usb_device_id *id)
 {
@@ -75,6 +80,7 @@ static struct drm_driver driver = {
         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
         .load = udl_driver_load,
         .unload = udl_driver_unload,
+        .set_busid = udl_driver_set_busid,
 
         /* gem hooks */
         .gem_free_object = udl_gem_free_object,
diff --git a/drivers/gpu/drm/via/via_drv.c b/drivers/gpu/drm/via/via_drv.c
index 50abc2adfaee..c16ffa63ded6 100644
--- a/drivers/gpu/drm/via/via_drv.c
+++ b/drivers/gpu/drm/via/via_drv.c
@@ -79,6 +79,7 @@ static struct drm_driver driver = {
         .open = via_driver_open,
         .preclose = via_reclaim_buffers_locked,
         .postclose = via_driver_postclose,
+        .set_busid = drm_pci_set_busid,
         .context_dtor = via_final_context,
         .get_vblank_counter = via_get_vblank_counter,
         .enable_vblank = via_enable_vblank,
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index 18b54acacfbb..7197af157313 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -1418,6 +1418,7 @@ static struct drm_driver driver = {
         .open = vmw_driver_open,
         .preclose = vmw_preclose,
         .postclose = vmw_postclose,
+        .set_busid = drm_pci_set_busid,
 
         .dumb_create = vmw_dumb_create,
         .dumb_map_offset = vmw_dumb_map_offset,
diff --git a/drivers/staging/imx-drm/imx-drm-core.c b/drivers/staging/imx-drm/imx-drm-core.c
index 6b22106534d8..16392b674d79 100644
--- a/drivers/staging/imx-drm/imx-drm-core.c
+++ b/drivers/staging/imx-drm/imx-drm-core.c
@@ -528,6 +528,7 @@ static struct drm_driver imx_drm_driver = {
         .unload                 = imx_drm_driver_unload,
         .lastclose              = imx_drm_driver_lastclose,
         .preclose               = imx_drm_driver_preclose,
+        .set_busid              = drm_platform_set_busid,
         .gem_free_object        = drm_gem_cma_free_object,
         .gem_vm_ops             = &drm_gem_cma_vm_ops,
         .dumb_create            = drm_gem_cma_dumb_create,
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 98b1eafebc1c..c82f292efcd4 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -627,6 +627,7 @@ struct drm_driver {
         int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
         int (*dma_quiescent) (struct drm_device *);
         int (*context_dtor) (struct drm_device *dev, int context);
+        int (*set_busid)(struct drm_device *dev, struct drm_master *master);
 
         /**
          * get_vblank_counter - get raw hardware vblank counter
@@ -1498,6 +1499,7 @@ extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
 extern int drm_get_pci_dev(struct pci_dev *pdev,
                            const struct pci_device_id *ent,
                            struct drm_driver *driver);
+extern int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master);
 
 #define DRM_PCIE_SPEED_25 1
 #define DRM_PCIE_SPEED_50 2
@@ -1507,6 +1509,7 @@ extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
 
 /* platform section */
 extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
+extern int drm_platform_set_busid(struct drm_device *d, struct drm_master *m);
 
 /* returns true if currently okay to sleep */
 static __inline__ bool drm_can_sleep(void)