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, 15 insertions, 15 deletions

diff --git a/drivers/gpu/drm/mxsfb/mxsfb_kms.c b/drivers/gpu/drm/mxsfb/mxsfb_kms.c
index 0bff493bf2a8..3bcc9c0f2019 100644
--- a/drivers/gpu/drm/mxsfb/mxsfb_kms.c
+++ b/drivers/gpu/drm/mxsfb/mxsfb_kms.c
@@ -352,7 +352,7 @@ static void mxsfb_crtc_atomic_enable(struct drm_crtc *crtc,
 	struct drm_bridge_state *bridge_state = NULL;
 	struct drm_device *drm = mxsfb->drm;
 	u32 bus_format = 0;
-	dma_addr_t paddr;
+	dma_addr_t dma_addr;
 
 	pm_runtime_get_sync(drm->dev);
 	mxsfb_enable_axi_clk(mxsfb);
@@ -388,10 +388,10 @@ static void mxsfb_crtc_atomic_enable(struct drm_crtc *crtc,
 	mxsfb_crtc_mode_set_nofb(mxsfb, bridge_state, bus_format);
 
 	/* Write cur_buf as well to avoid an initial corrupt frame */
-	paddr = drm_fb_dma_get_gem_addr(new_pstate->fb, new_pstate, 0);
-	if (paddr) {
-		writel(paddr, mxsfb->base + mxsfb->devdata->cur_buf);
-		writel(paddr, mxsfb->base + mxsfb->devdata->next_buf);
+	dma_addr = drm_fb_dma_get_gem_addr(new_pstate->fb, new_pstate, 0);
+	if (dma_addr) {
+		writel(dma_addr, mxsfb->base + mxsfb->devdata->cur_buf);
+		writel(dma_addr, mxsfb->base + mxsfb->devdata->next_buf);
 	}
 
 	mxsfb_enable_controller(mxsfb);
@@ -541,11 +541,11 @@ static void mxsfb_plane_primary_atomic_update(struct drm_plane *plane,
 	struct mxsfb_drm_private *mxsfb = to_mxsfb_drm_private(plane->dev);
 	struct drm_plane_state *new_pstate = drm_atomic_get_new_plane_state(state,
 									    plane);
-	dma_addr_t paddr;
+	dma_addr_t dma_addr;
 
-	paddr = drm_fb_dma_get_gem_addr(new_pstate->fb, new_pstate, 0);
-	if (paddr)
-		writel(paddr, mxsfb->base + mxsfb->devdata->next_buf);
+	dma_addr = drm_fb_dma_get_gem_addr(new_pstate->fb, new_pstate, 0);
+	if (dma_addr)
+		writel(dma_addr, mxsfb->base + mxsfb->devdata->next_buf);
 }
 
 static void mxsfb_plane_overlay_atomic_update(struct drm_plane *plane,
@@ -556,11 +556,11 @@ static void mxsfb_plane_overlay_atomic_update(struct drm_plane *plane,
 	struct mxsfb_drm_private *mxsfb = to_mxsfb_drm_private(plane->dev);
 	struct drm_plane_state *new_pstate = drm_atomic_get_new_plane_state(state,
 									    plane);
-	dma_addr_t paddr;
+	dma_addr_t dma_addr;
 	u32 ctrl;
 
-	paddr = drm_fb_dma_get_gem_addr(new_pstate->fb, new_pstate, 0);
-	if (!paddr) {
+	dma_addr = drm_fb_dma_get_gem_addr(new_pstate->fb, new_pstate, 0);
+	if (!dma_addr) {
 		writel(0, mxsfb->base + LCDC_AS_CTRL);
 		return;
 	}
@@ -571,16 +571,16 @@ static void mxsfb_plane_overlay_atomic_update(struct drm_plane *plane,
 	 * is understood, live with the 16 initial invalid pixels on the first
 	 * line and start 64 bytes within the framebuffer.
 	 */
-	paddr += 64;
+	dma_addr += 64;
 
-	writel(paddr, mxsfb->base + LCDC_AS_NEXT_BUF);
+	writel(dma_addr, mxsfb->base + LCDC_AS_NEXT_BUF);
 
 	/*
 	 * If the plane was previously disabled, write LCDC_AS_BUF as well to
 	 * provide the first buffer.
 	 */
 	if (!old_pstate->fb)
-		writel(paddr, mxsfb->base + LCDC_AS_BUF);
+		writel(dma_addr, mxsfb->base + LCDC_AS_BUF);
 
 	ctrl = AS_CTRL_AS_ENABLE | AS_CTRL_ALPHA(255);