drm/ast: Replace struct ast_framebuffer with GEM framebuffer helpers

The ast driver's struct ast_framebuffer is a buffer object with GEM
interface. There are already GEM framebuffer helpers that implement
the same functionality. Convert ast to these.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20190627173410.8300-1-tzimmermann@suse.de

drivers/gpu/drm/ast/ast_drv.h

@@ -239,14 +239,8 @@ struct ast_encoder {
 	struct drm_encoder base;
 };
 
-struct ast_framebuffer {
-	struct drm_framebuffer base;
-	struct drm_gem_object *obj;
-};
-
 struct ast_fbdev {
 	struct drm_fb_helper helper; /* must be first */
-	struct ast_framebuffer afb;
 	void *sysram;
 	int size;
 	int x1, y1, x2, y2; /* dirty rect */
@@ -256,7 +250,6 @@ struct ast_fbdev {
 #define to_ast_crtc(x) container_of(x, struct ast_crtc, base)
 #define to_ast_connector(x) container_of(x, struct ast_connector, base)
 #define to_ast_encoder(x) container_of(x, struct ast_encoder, base)
-#define to_ast_framebuffer(x) container_of(x, struct ast_framebuffer, base)
 
 struct ast_vbios_stdtable {
 	u8 misc;
@@ -296,11 +289,6 @@ struct ast_vbios_mode_info {
 extern int ast_mode_init(struct drm_device *dev);
 extern void ast_mode_fini(struct drm_device *dev);
 
-int ast_framebuffer_init(struct drm_device *dev,
-			 struct ast_framebuffer *ast_fb,
-			 const struct drm_mode_fb_cmd2 *mode_cmd,
-			 struct drm_gem_object *obj);
-
 int ast_fbdev_init(struct drm_device *dev);
 void ast_fbdev_fini(struct drm_device *dev);
 void ast_fbdev_set_suspend(struct drm_device *dev, int state);

drivers/gpu/drm/ast/ast_fb.c

@@ -38,9 +38,10 @@
 
 #include <drm/drmP.h>
 #include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
 #include <drm/drm_fb_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_util.h>
-#include <drm/drm_crtc_helper.h>
 
 #include "ast_drv.h"
 
@@ -50,15 +51,16 @@ static void ast_dirty_update(struct ast_fbdev *afbdev,
 	int i;
 	struct drm_gem_vram_object *gbo;
 	int src_offset, dst_offset;
-	int bpp = afbdev->afb.base.format->cpp[0];
 	int ret;
 	u8 *dst;
 	bool unmap = false;
 	bool store_for_later = false;
 	int x2, y2;
 	unsigned long flags;
+	struct drm_framebuffer *fb = afbdev->helper.fb;
+	int bpp = fb->format->cpp[0];
 
-	gbo = drm_gem_vram_of_gem(afbdev->afb.obj);
+	gbo = drm_gem_vram_of_gem(fb->obj[0]);
 
 	if (drm_can_sleep()) {
 		/* We pin the BO so it won't be moved during the
@@ -116,8 +118,7 @@ static void ast_dirty_update(struct ast_fbdev *afbdev,
 
 	for (i = y; i <= y2; i++) {
 		/* assume equal stride for now */
-		src_offset = dst_offset =
-			i * afbdev->afb.base.pitches[0] + (x * bpp);
+		src_offset = dst_offset = i * fb->pitches[0] + (x * bpp);
 		memcpy_toio(dst + dst_offset, afbdev->sysram + src_offset,
 			    (x2 - x + 1) * bpp);
 	}
@@ -222,14 +223,15 @@ static int astfb_create(struct drm_fb_helper *helper,
 		ret = PTR_ERR(info);
 		goto out;
 	}
-	ret = ast_framebuffer_init(dev, &afbdev->afb, &mode_cmd, gobj);
-	if (ret)
+	fb = drm_gem_fbdev_fb_create(dev, sizes, 0, gobj, NULL);
+	if (IS_ERR(fb)) {
+		ret = PTR_ERR(fb);
 		goto out;
+	}
 
 	afbdev->sysram = sysram;
 	afbdev->size = size;
 
-	fb = &afbdev->afb.base;
 	afbdev->helper.fb = fb;
 
 	info->fbops = &astfb_ops;
@@ -261,20 +263,13 @@ static const struct drm_fb_helper_funcs ast_fb_helper_funcs = {
 static void ast_fbdev_destroy(struct drm_device *dev,
 			      struct ast_fbdev *afbdev)
 {
-	struct ast_framebuffer *afb = &afbdev->afb;
-
 	drm_helper_force_disable_all(dev);
 	drm_fb_helper_unregister_fbi(&afbdev->helper);
 
-	if (afb->obj) {
-		drm_gem_object_put_unlocked(afb->obj);
-		afb->obj = NULL;
-	}
 	drm_fb_helper_fini(&afbdev->helper);
+	drm_framebuffer_put(afbdev->helper.fb);
 
 	vfree(afbdev->sysram);
-	drm_framebuffer_unregister_private(&afb->base);
-	drm_framebuffer_cleanup(&afb->base);
 }
 
 int ast_fbdev_init(struct drm_device *dev)

drivers/gpu/drm/ast/ast_main.c

@@ -28,9 +28,9 @@
 #include <drm/drmP.h>
 #include "ast_drv.h"
 
-
-#include <drm/drm_fb_helper.h>
 #include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
 
 void ast_set_index_reg_mask(struct ast_private *ast,
 			    uint32_t base, uint8_t index,
@@ -383,67 +383,8 @@ static int ast_get_dram_info(struct drm_device *dev)
 	return 0;
 }
 
-static void ast_user_framebuffer_destroy(struct drm_framebuffer *fb)
-{
-	struct ast_framebuffer *ast_fb = to_ast_framebuffer(fb);
-
-	drm_gem_object_put_unlocked(ast_fb->obj);
-	drm_framebuffer_cleanup(fb);
-	kfree(ast_fb);
-}
-
-static const struct drm_framebuffer_funcs ast_fb_funcs = {
-	.destroy = ast_user_framebuffer_destroy,
-};
-
-
-int ast_framebuffer_init(struct drm_device *dev,
-			 struct ast_framebuffer *ast_fb,
-			 const struct drm_mode_fb_cmd2 *mode_cmd,
-			 struct drm_gem_object *obj)
-{
-	int ret;
-
-	drm_helper_mode_fill_fb_struct(dev, &ast_fb->base, mode_cmd);
-	ast_fb->obj = obj;
-	ret = drm_framebuffer_init(dev, &ast_fb->base, &ast_fb_funcs);
-	if (ret) {
-		DRM_ERROR("framebuffer init failed %d\n", ret);
-		return ret;
-	}
-	return 0;
-}
-
-static struct drm_framebuffer *
-ast_user_framebuffer_create(struct drm_device *dev,
-	       struct drm_file *filp,
-	       const struct drm_mode_fb_cmd2 *mode_cmd)
-{
-	struct drm_gem_object *obj;
-	struct ast_framebuffer *ast_fb;
-	int ret;
-
-	obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
-	if (obj == NULL)
-		return ERR_PTR(-ENOENT);
-
-	ast_fb = kzalloc(sizeof(*ast_fb), GFP_KERNEL);
-	if (!ast_fb) {
-		drm_gem_object_put_unlocked(obj);
-		return ERR_PTR(-ENOMEM);
-	}
-
-	ret = ast_framebuffer_init(dev, ast_fb, mode_cmd, obj);
-	if (ret) {
-		drm_gem_object_put_unlocked(obj);
-		kfree(ast_fb);
-		return ERR_PTR(ret);
-	}
-	return &ast_fb->base;
-}
-
 static const struct drm_mode_config_funcs ast_mode_funcs = {
-	.fb_create = ast_user_framebuffer_create,
+	.fb_create = drm_gem_fb_create
 };
 
 static u32 ast_get_vram_info(struct drm_device *dev)

drivers/gpu/drm/ast/ast_mode.c

@@ -526,27 +526,21 @@ static int ast_crtc_do_set_base(struct drm_crtc *crtc,
 				int x, int y, int atomic)
 {
 	struct ast_private *ast = crtc->dev->dev_private;
-	struct drm_gem_object *obj;
-	struct ast_framebuffer *ast_fb;
 	struct drm_gem_vram_object *gbo;
 	int ret;
 	s64 gpu_addr;
 	void *base;
 
 	if (!atomic && fb) {
-		ast_fb = to_ast_framebuffer(fb);
-		obj = ast_fb->obj;
-		gbo = drm_gem_vram_of_gem(obj);
+		gbo = drm_gem_vram_of_gem(fb->obj[0]);
 
 		/* unmap if console */
-		if (&ast->fbdev->afb == ast_fb)
+		if (ast->fbdev->helper.fb == fb)
 			drm_gem_vram_kunmap(gbo);
 		drm_gem_vram_unpin(gbo);
 	}
 
-	ast_fb = to_ast_framebuffer(crtc->primary->fb);
-	obj = ast_fb->obj;
-	gbo = drm_gem_vram_of_gem(obj);
+	gbo = drm_gem_vram_of_gem(crtc->primary->fb->obj[0]);
 
 	ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM);
 	if (ret)
@@ -557,7 +551,7 @@ static int ast_crtc_do_set_base(struct drm_crtc *crtc,
 		goto err_drm_gem_vram_unpin;
 	}
 
-	if (&ast->fbdev->afb == ast_fb) {
+	if (ast->fbdev->helper.fb == crtc->primary->fb) {
 		/* if pushing console in kmap it */
 		base = drm_gem_vram_kmap(gbo, true, NULL);
 		if (IS_ERR(base)) {
@@ -625,12 +619,12 @@ static void ast_crtc_disable(struct drm_crtc *crtc)
 	ast_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
 	if (crtc->primary->fb) {
 		struct ast_private *ast = crtc->dev->dev_private;
-		struct ast_framebuffer *ast_fb = to_ast_framebuffer(crtc->primary->fb);
-		struct drm_gem_object *obj = ast_fb->obj;
-		struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(obj);
+		struct drm_framebuffer *fb = crtc->primary->fb;
+		struct drm_gem_vram_object *gbo =
+			drm_gem_vram_of_gem(fb->obj[0]);
 
 		/* unmap if console */
-		if (&ast->fbdev->afb == ast_fb)
+		if (ast->fbdev->helper.fb == fb)
 			drm_gem_vram_kunmap(gbo);
 		drm_gem_vram_unpin(gbo);
 	}