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

1 files changed, 7 insertions, 7 deletions

diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
index 8def7e0290ce..f9c0a56d3a14 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
@@ -310,7 +310,7 @@ static int sun8i_vi_layer_update_buffer(struct sun8i_mixer *mixer, int channel,
 	const struct drm_format_info *format = fb->format;
 	struct drm_gem_dma_object *gem;
 	u32 dx, dy, src_x, src_y;
-	dma_addr_t paddr;
+	dma_addr_t dma_addr;
 	u32 ch_base;
 	int i;
 
@@ -324,10 +324,10 @@ static int sun8i_vi_layer_update_buffer(struct sun8i_mixer *mixer, int channel,
 		/* Get the physical address of the buffer in memory */
 		gem = drm_fb_dma_get_gem_obj(fb, i);
 
-		DRM_DEBUG_DRIVER("Using GEM @ %pad\n", &gem->paddr);
+		DRM_DEBUG_DRIVER("Using GEM @ %pad\n", &gem->dma_addr);
 
 		/* Compute the start of the displayed memory */
-		paddr = gem->paddr + fb->offsets[i];
+		dma_addr = gem->dma_addr + fb->offsets[i];
 
 		dx = src_x;
 		dy = src_y;
@@ -338,8 +338,8 @@ static int sun8i_vi_layer_update_buffer(struct sun8i_mixer *mixer, int channel,
 		}
 
 		/* Fixup framebuffer address for src coordinates */
-		paddr += dx * format->cpp[i];
-		paddr += dy * fb->pitches[i];
+		dma_addr += dx * format->cpp[i];
+		dma_addr += dy * fb->pitches[i];
 
 		/* Set the line width */
 		DRM_DEBUG_DRIVER("Layer %d. line width: %d bytes\n",
@@ -350,12 +350,12 @@ static int sun8i_vi_layer_update_buffer(struct sun8i_mixer *mixer, int channel,
 			     fb->pitches[i]);
 
 		DRM_DEBUG_DRIVER("Setting %d. buffer address to %pad\n",
-				 i + 1, &paddr);
+				 i + 1, &dma_addr);
 
 		regmap_write(mixer->engine.regs,
 			     SUN8I_MIXER_CHAN_VI_LAYER_TOP_LADDR(ch_base,
 								 overlay, i),
-			     lower_32_bits(paddr));
+			     lower_32_bits(dma_addr));
 	}
 
 	return 0;