drm/gem: rename struct drm_gem_dma_object.{paddr => dma_addr}

The field paddr of struct drm_gem_dma_object holds a DMA address, which
might actually be a physical address. However, depending on the platform,
it can also be a bus address or a virtual address managed by an IOMMU.

Hence, rename the field to dma_addr, which is more applicable.

In order to do this renaming the following coccinelle script was used:

```
	@@
	struct drm_gem_dma_object *gem;
	@@

	- gem->paddr
	+ gem->dma_addr

	@@
	struct drm_gem_dma_object gem;
	@@

	- gem.paddr
	+ gem.dma_addr

	@exists@
	typedef dma_addr_t;
	symbol paddr;
	@@

	dma_addr_t paddr;
	<...
	- paddr
	+ dma_addr
	...>

	@@
	symbol paddr;
	@@
	dma_addr_t
	- paddr
	+ dma_addr
	;

```

This patch is compile-time tested with:

```
	make ARCH={x86_64,arm,arm64} allyesconfig
	make ARCH={x86_64,arm,arm64} drivers/gpu/drm`
```

Acked-by: Sam Ravnborg <sam@ravnborg.org>
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220802000405.949236-5-dakr@redhat.com

3 files changed, 9 insertions, 9 deletions

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c b/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c
index f1b27db5dad5..df5da5a44755 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c
@@ -137,7 +137,7 @@ komeda_fb_none_afbc_size_check(struct komeda_dev *mdev, struct komeda_fb *kfb,
 		}
 
 		min_size = komeda_fb_get_pixel_addr(kfb, 0, fb->height, i)
-			 - to_drm_gem_dma_obj(obj)->paddr;
+			 - to_drm_gem_dma_obj(obj)->dma_addr;
 		if (obj->size < min_size) {
 			DRM_DEBUG_KMS("The fb->obj[%d] size: 0x%zx lower than the minimum requirement: 0x%llx.\n",
 				      i, obj->size, min_size);
@@ -260,7 +260,7 @@ komeda_fb_get_pixel_addr(struct komeda_fb *kfb, int x, int y, int plane)
 			+ plane_y * fb->pitches[plane];
 	}
 
-	return obj->paddr + offset;
+	return obj->dma_addr + offset;
 }
 
 /* if the fb can be supported by a specific layer */
diff --git a/drivers/gpu/drm/arm/malidp_mw.c b/drivers/gpu/drm/arm/malidp_mw.c
index cefae03f1bcc..ef76d0e6ee2f 100644
--- a/drivers/gpu/drm/arm/malidp_mw.c
+++ b/drivers/gpu/drm/arm/malidp_mw.c
@@ -170,7 +170,7 @@ malidp_mw_encoder_atomic_check(struct drm_encoder *encoder,
 			return -EINVAL;
 		}
 		mw_state->pitches[i] = fb->pitches[i];
-		mw_state->addrs[i] = obj->paddr + fb->offsets[i];
+		mw_state->addrs[i] = obj->dma_addr + fb->offsets[i];
 	}
 	mw_state->n_planes = n_planes;
 
diff --git a/drivers/gpu/drm/arm/malidp_planes.c b/drivers/gpu/drm/arm/malidp_planes.c
index b7948ca0060c..45f5e35e7f24 100644
--- a/drivers/gpu/drm/arm/malidp_planes.c
+++ b/drivers/gpu/drm/arm/malidp_planes.c
@@ -714,7 +714,7 @@ static void malidp_set_plane_base_addr(struct drm_framebuffer *fb,
 				       struct malidp_plane *mp,
 				       int plane_index)
 {
-	dma_addr_t paddr;
+	dma_addr_t dma_addr;
 	u16 ptr;
 	struct drm_plane *plane = &mp->base;
 	bool afbc = fb->modifier ? true : false;
@@ -729,8 +729,8 @@ static void malidp_set_plane_base_addr(struct drm_framebuffer *fb,
 	 * and _AD_CROP_V registers.
 	 */
 	if (!afbc) {
-		paddr = drm_fb_dma_get_gem_addr(fb, plane->state,
-						plane_index);
+		dma_addr = drm_fb_dma_get_gem_addr(fb, plane->state,
+						   plane_index);
 	} else {
 		struct drm_gem_dma_object *obj;
 
@@ -738,11 +738,11 @@ static void malidp_set_plane_base_addr(struct drm_framebuffer *fb,
 
 		if (WARN_ON(!obj))
 			return;
-		paddr = obj->paddr;
+		dma_addr = obj->dma_addr;
 	}
 
-	malidp_hw_write(mp->hwdev, lower_32_bits(paddr), ptr);
-	malidp_hw_write(mp->hwdev, upper_32_bits(paddr), ptr + 4);
+	malidp_hw_write(mp->hwdev, lower_32_bits(dma_addr), ptr);
+	malidp_hw_write(mp->hwdev, upper_32_bits(dma_addr), ptr + 4);
 }
 
 static void malidp_de_set_plane_afbc(struct drm_plane *plane)