drm: Upcast struct drm_device.dev to struct pci_device; replace pdev

We have DRM drivers based on USB, SPI and platform devices. All of them
are fine with storing their device reference in struct drm_device.dev.
PCI devices should be no exception. Therefore struct drm_device.pdev is
deprecated.

Instead upcast from struct drm_device.dev with to_pci_dev(). PCI-specific
code can use dev_is_pci() to test for a PCI device. This patch changes
the DRM core code and documentation accordingly.

v4:
	* split-off pdev deprecation into separate patch

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Tested-by: Andy Lavr <andy.lavr@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210118131420.15874-2-tzimmermann@suse.de

1 files changed, 15 insertions, 11 deletions

diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c
index 5370e6b492fd..2294a1580d35 100644
--- a/drivers/gpu/drm/drm_pci.c
+++ b/drivers/gpu/drm/drm_pci.c
@@ -70,7 +70,7 @@ drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t ali
 		return NULL;
 
 	dmah->size = size;
-	dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size,
+	dmah->vaddr = dma_alloc_coherent(dev->dev, size,
 					 &dmah->busaddr,
 					 GFP_KERNEL);
 
@@ -93,7 +93,7 @@ EXPORT_SYMBOL(drm_pci_alloc);
  */
 void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
 {
-	dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
+	dma_free_coherent(dev->dev, dmah->size, dmah->vaddr,
 			  dmah->busaddr);
 	kfree(dmah);
 }
@@ -112,16 +112,18 @@ static int drm_get_pci_domain(struct drm_device *dev)
 		return 0;
 #endif /* __alpha__ */
 
-	return pci_domain_nr(dev->pdev->bus);
+	return pci_domain_nr(to_pci_dev(dev->dev)->bus);
 }
 
 int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
 {
+	struct pci_dev *pdev = to_pci_dev(dev->dev);
+
 	master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d",
 					drm_get_pci_domain(dev),
-					dev->pdev->bus->number,
-					PCI_SLOT(dev->pdev->devfn),
-					PCI_FUNC(dev->pdev->devfn));
+					pdev->bus->number,
+					PCI_SLOT(pdev->devfn),
+					PCI_FUNC(pdev->devfn));
 	if (!master->unique)
 		return -ENOMEM;
 
@@ -131,12 +133,14 @@ int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
 
 static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
 {
+	struct pci_dev *pdev = to_pci_dev(dev->dev);
+
 	if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
-	    (p->busnum & 0xff) != dev->pdev->bus->number ||
-	    p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn))
+	    (p->busnum & 0xff) != pdev->bus->number ||
+	    p->devnum != PCI_SLOT(pdev->devfn) || p->funcnum != PCI_FUNC(pdev->devfn))
 		return -EINVAL;
 
-	p->irq = dev->pdev->irq;
+	p->irq = pdev->irq;
 
 	DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
 		  p->irq);
@@ -164,7 +168,7 @@ int drm_legacy_irq_by_busid(struct drm_device *dev, void *data,
 		return -EOPNOTSUPP;
 
 	/* UMS was only ever support on PCI devices. */
-	if (WARN_ON(!dev->pdev))
+	if (WARN_ON(!dev_is_pci(dev->dev)))
 		return -EINVAL;
 
 	if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
@@ -188,7 +192,7 @@ void drm_pci_agp_destroy(struct drm_device *dev)
 static void drm_pci_agp_init(struct drm_device *dev)
 {
 	if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
-		if (pci_find_capability(dev->pdev, PCI_CAP_ID_AGP))
+		if (pci_find_capability(to_pci_dev(dev->dev), PCI_CAP_ID_AGP))
 			dev->agp = drm_agp_init(dev);
 		if (dev->agp) {
 			dev->agp->agp_mtrr = arch_phys_wc_add(