drm/gem: rename GEM CMA helpers to GEM DMA helpers

Rename "GEM CMA" helpers to "GEM DMA" helpers - considering the
hierarchy of APIs (mm/cma -> dma -> gem dma) calling them "GEM
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="(${REGEX_SYM_UPPER}*)(GEM)_CMA_(${REGEX_SYM_UPPER}*)"
	REGEX_GREP_LOWER="(${REGEX_SYM_LOWER}*)(gem)_cma_(${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

	# Rename all 'cma_obj's to 'dma_obj'.
	for ff in $(grep -RiHl "cma_obj" $DIRS)
	do
		sed -i -E "s/cma_obj/dma_obj/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 "GEM CMA", but not "FB CMA".

Also drivers/gpu/drm/Makefile was fixed up manually after renaming
drm_gem_cma_helper.c to drm_gem_dma_helper.c.

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/20220802000405.949236-4-dakr@redhat.com

7 files changed, 12 insertions, 12 deletions

diff --git a/drivers/gpu/drm/sun4i/Kconfig b/drivers/gpu/drm/sun4i/Kconfig
index 1c2f8909f3cd..4741d9f6544c 100644
--- a/drivers/gpu/drm/sun4i/Kconfig
+++ b/drivers/gpu/drm/sun4i/Kconfig
@@ -3,7 +3,7 @@ config DRM_SUN4I
 	tristate "DRM Support for Allwinner A10 Display Engine"
 	depends on DRM && COMMON_CLK
 	depends on ARCH_SUNXI || COMPILE_TEST
-	select DRM_GEM_CMA_HELPER
+	select DRM_GEM_DMA_HELPER
 	select DRM_KMS_HELPER
 	select DRM_PANEL
 	select REGMAP_MMIO
diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c
index fa4539c3b149..1fbdd4961194 100644
--- a/drivers/gpu/drm/sun4i/sun4i_backend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
@@ -22,7 +22,7 @@
 #include <drm/drm_fb_dma_helper.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_framebuffer.h>
-#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_dma_helper.h>
 #include <drm/drm_probe_helper.h>
 
 #include "sun4i_backend.h"
diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c
index 382074ef1394..d06ffd99d86e 100644
--- a/drivers/gpu/drm/sun4i/sun4i_drv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
@@ -18,7 +18,7 @@
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_fb_helper.h>
-#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_dma_helper.h>
 #include <drm/drm_module.h>
 #include <drm/drm_of.h>
 #include <drm/drm_probe_helper.h>
@@ -37,10 +37,10 @@ static int drm_sun4i_gem_dumb_create(struct drm_file *file_priv,
 	/* The hardware only allows even pitches for YUV buffers. */
 	args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), 2);
 
-	return drm_gem_cma_dumb_create_internal(file_priv, drm, args);
+	return drm_gem_dma_dumb_create_internal(file_priv, drm, args);
 }
 
-DEFINE_DRM_GEM_CMA_FOPS(sun4i_drv_fops);
+DEFINE_DRM_GEM_DMA_FOPS(sun4i_drv_fops);
 
 static const struct drm_driver sun4i_drv_driver = {
 	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
@@ -54,7 +54,7 @@ static const struct drm_driver sun4i_drv_driver = {
 	.minor			= 0,
 
 	/* GEM Operations */
-	DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(drm_sun4i_gem_dumb_create),
+	DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(drm_sun4i_gem_dumb_create),
 };
 
 static int sun4i_drv_bind(struct device *dev)
diff --git a/drivers/gpu/drm/sun4i/sun4i_frontend.c b/drivers/gpu/drm/sun4i/sun4i_frontend.c
index 4a811e803dac..baeeda04691f 100644
--- a/drivers/gpu/drm/sun4i/sun4i_frontend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_frontend.c
@@ -17,7 +17,7 @@
 #include <drm/drm_fb_dma_helper.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_framebuffer.h>
-#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_dma_helper.h>
 #include <drm/drm_plane.h>
 
 #include "sun4i_drv.h"
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index b3d1c0940406..bafee05f6b24 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -17,7 +17,7 @@
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_framebuffer.h>
-#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_dma_helper.h>
 #include <drm/drm_probe_helper.h>
 
 #include "sun4i_drv.h"
diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
index 900c71c47a3b..090523356193 100644
--- a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
@@ -17,7 +17,7 @@
 #include <drm/drm_fourcc.h>
 #include <drm/drm_framebuffer.h>
 #include <drm/drm_gem_atomic_helper.h>
-#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_dma_helper.h>
 #include <drm/drm_probe_helper.h>
 
 #include "sun8i_mixer.h"
@@ -192,7 +192,7 @@ static int sun8i_ui_layer_update_buffer(struct sun8i_mixer *mixer, int channel,
 {
 	struct drm_plane_state *state = plane->state;
 	struct drm_framebuffer *fb = state->fb;
-	struct drm_gem_cma_object *gem;
+	struct drm_gem_dma_object *gem;
 	dma_addr_t paddr;
 	u32 ch_base;
 	int bpp;
diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
index 8b5dae30c8c5..8def7e0290ce 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
@@ -10,7 +10,7 @@
 #include <drm/drm_fb_dma_helper.h>
 #include <drm/drm_framebuffer.h>
 #include <drm/drm_gem_atomic_helper.h>
-#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_dma_helper.h>
 #include <drm/drm_probe_helper.h>
 
 #include "sun8i_csc.h"
@@ -308,7 +308,7 @@ static int sun8i_vi_layer_update_buffer(struct sun8i_mixer *mixer, int channel,
 	struct drm_plane_state *state = plane->state;
 	struct drm_framebuffer *fb = state->fb;
 	const struct drm_format_info *format = fb->format;
-	struct drm_gem_cma_object *gem;
+	struct drm_gem_dma_object *gem;
 	u32 dx, dy, src_x, src_y;
 	dma_addr_t paddr;
 	u32 ch_base;