drm/fb: rename FB CMA helpers to FB DMA helpers

Rename "FB CMA" helpers to "FB DMA" helpers - considering the hierarchy
of APIs (mm/cma -> dma -> fb dma) calling them "FB DMA" seems to be
more applicable.

Besides that, commit e57924d4ae80 ("drm/doc: Task to rename CMA helpers")
requests to rename the CMA helpers and implies that people seem to be
confused about the naming.

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

```
	#!/bin/bash

	DIRS="drivers/gpu include/drm Documentation/gpu"

	REGEX_SYM_UPPER="[0-9A-Z_\-]"
	REGEX_SYM_LOWER="[0-9a-z_\-]"

	REGEX_GREP_UPPER="(${REGEX_SYM_UPPER}*)(FB)_CMA_(${REGEX_SYM_UPPER}*)"
	REGEX_GREP_LOWER="(${REGEX_SYM_LOWER}*)(fb)_cma_(${REGEX_SYM_LOWER}*)"

	REGEX_SED_UPPER="s/${REGEX_GREP_UPPER}/\1\2_DMA_\3/g"
	REGEX_SED_LOWER="s/${REGEX_GREP_LOWER}/\1\2_dma_\3/g"

	# Find all upper case 'CMA' symbols and replace them with 'DMA'.
	for ff in $(grep -REHl "${REGEX_GREP_UPPER}" $DIRS)
	do
	       sed -i -E "$REGEX_SED_UPPER" $ff
	done

	# Find all lower case 'cma' symbols and replace them with 'dma'.
	for ff in $(grep -REHl "${REGEX_GREP_LOWER}" $DIRS)
	do
	       sed -i -E "$REGEX_SED_LOWER" $ff
	done

	# Replace all occurrences of 'CMA' / 'cma' in comments and
	# documentation files with 'DMA' / 'dma'.
	for ff in $(grep -RiHl " cma " $DIRS)
	do
		sed -i -E "s/ cma / dma /g" $ff
		sed -i -E "s/ CMA / DMA /g" $ff
	done
```

Only a few more manual modifications were needed, e.g. reverting the
following modifications in some DRM Kconfig files

    -       select CMA if HAVE_DMA_CONTIGUOUS
    +       select DMA if HAVE_DMA_CONTIGUOUS

as well as manually picking the occurrences of 'CMA'/'cma' in comments and
documentation which relate to "FB CMA", but not "GEM CMA".

This patch is compile-time tested building a x86_64 kernel with
`make allyesconfig && make drivers/gpu/drm`.

Acked-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com> #drivers/gpu/drm/arm
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220802000405.949236-3-dakr@redhat.com

1 files changed, 7 insertions, 7 deletions

diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
index 8f3307b279e7..42a98ef73d03 100644
--- a/drivers/gpu/drm/stm/ltdc.c
+++ b/drivers/gpu/drm/stm/ltdc.c
@@ -28,7 +28,7 @@
 #include <drm/drm_bridge.h>
 #include <drm/drm_device.h>
 #include <drm/drm_edid.h>
-#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_fb_dma_helper.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_framebuffer.h>
 #include <drm/drm_gem_atomic_helper.h>
@@ -1346,7 +1346,7 @@ static void ltdc_plane_atomic_update(struct drm_plane *plane,
 	}
 
 	/* Sets the FB address */
-	paddr = (u32)drm_fb_cma_get_gem_addr(fb, newstate, 0);
+	paddr = (u32)drm_fb_dma_get_gem_addr(fb, newstate, 0);
 
 	if (newstate->rotation & DRM_MODE_REFLECT_X)
 		paddr += (fb->format->cpp[0] * (x1 - x0 + 1)) - 1;
@@ -1380,7 +1380,7 @@ static void ltdc_plane_atomic_update(struct drm_plane *plane,
 			case DRM_FORMAT_NV12:
 			case DRM_FORMAT_NV21:
 			/* Configure the auxiliary frame buffer address 0 */
-			paddr1 = (u32)drm_fb_cma_get_gem_addr(fb, newstate, 1);
+			paddr1 = (u32)drm_fb_dma_get_gem_addr(fb, newstate, 1);
 
 			if (newstate->rotation & DRM_MODE_REFLECT_X)
 				paddr1 += ((fb->format->cpp[1] * (x1 - x0 + 1)) >> 1) - 1;
@@ -1392,8 +1392,8 @@ static void ltdc_plane_atomic_update(struct drm_plane *plane,
 			break;
 			case DRM_FORMAT_YUV420:
 			/* Configure the auxiliary frame buffer address 0 & 1 */
-			paddr1 = (u32)drm_fb_cma_get_gem_addr(fb, newstate, 1);
-			paddr2 = (u32)drm_fb_cma_get_gem_addr(fb, newstate, 2);
+			paddr1 = (u32)drm_fb_dma_get_gem_addr(fb, newstate, 1);
+			paddr2 = (u32)drm_fb_dma_get_gem_addr(fb, newstate, 2);
 
 			if (newstate->rotation & DRM_MODE_REFLECT_X) {
 				paddr1 += ((fb->format->cpp[1] * (x1 - x0 + 1)) >> 1) - 1;
@@ -1410,8 +1410,8 @@ static void ltdc_plane_atomic_update(struct drm_plane *plane,
 			break;
 			case DRM_FORMAT_YVU420:
 			/* Configure the auxiliary frame buffer address 0 & 1 */
-			paddr1 = (u32)drm_fb_cma_get_gem_addr(fb, newstate, 2);
-			paddr2 = (u32)drm_fb_cma_get_gem_addr(fb, newstate, 1);
+			paddr1 = (u32)drm_fb_dma_get_gem_addr(fb, newstate, 2);
+			paddr2 = (u32)drm_fb_dma_get_gem_addr(fb, newstate, 1);
 
 			if (newstate->rotation & DRM_MODE_REFLECT_X) {
 				paddr1 += ((fb->format->cpp[1] * (x1 - x0 + 1)) >> 1) - 1;