[PATCH] Revert "drm/amdgpu: Verify bo size can fit framebuffer size on init."

[Bas Nieuwenhuizen]

This reverts commit f258907fdd835e1aed6d666b00cdd0f186676b7c.

Same problem as "drm/amdgpu: Verify bo size can fit framebuffer size",
but because it gets checked earlier it now only triggers on the
modifiers case.

There are a couple of reasons why the DRM core BO size check won't
work for AMDGPU, especially around DCC planes.

Signed-off-by: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>
---

For -fixes. Might have some conflicts with
"drm/amdgpu: Ensure that the modifier requested is supported by plane"
for amd-staging-drm-next

 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 68 ++++-----------------
 drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c      |  4 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h    |  8 ---
 3 files changed, 15 insertions(+), 65 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
index 9a2f811450ed..cbe050436c7b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
@@ -870,62 +870,17 @@ static int amdgpu_display_get_fb_info(const struct amdgpu_framebuffer *amdgpu_fb
 	return r;
 }
 
-int amdgpu_display_gem_fb_init(struct drm_device *dev,
-			       struct amdgpu_framebuffer *rfb,
-			       const struct drm_mode_fb_cmd2 *mode_cmd,
-			       struct drm_gem_object *obj)
-{
-	int ret;
-
-	rfb->base.obj[0] = obj;
-	drm_helper_mode_fill_fb_struct(dev, &rfb->base, mode_cmd);
-	ret = drm_framebuffer_init(dev, &rfb->base, &amdgpu_fb_funcs);
-	if (ret)
-		goto err;
-
-	ret = amdgpu_display_framebuffer_init(dev, rfb, mode_cmd, obj);
-	if (ret)
-		goto err;
-
-	return 0;
-err:
-	drm_err(dev, "Failed to init gem fb: %d\n", ret);
-	rfb->base.obj[0] = NULL;
-	return ret;
-}
-
-int amdgpu_display_gem_fb_verify_and_init(
-	struct drm_device *dev, struct amdgpu_framebuffer *rfb,
-	struct drm_file *file_priv, const struct drm_mode_fb_cmd2 *mode_cmd,
-	struct drm_gem_object *obj)
-{
-	int ret;
-
-	rfb->base.obj[0] = obj;
-
-	/* Verify that bo size can fit the fb size. */
-	ret = drm_gem_fb_init_with_funcs(dev, &rfb->base, file_priv, mode_cmd,
-					 &amdgpu_fb_funcs);
-	if (ret)
-		goto err;
-
-	ret = amdgpu_display_framebuffer_init(dev, rfb, mode_cmd, obj);
-	if (ret)
-		goto err;
-
-	return 0;
-err:
-	drm_err(dev, "Failed to verify and init gem fb: %d\n", ret);
-	rfb->base.obj[0] = NULL;
-	return ret;
-}
-
 int amdgpu_display_framebuffer_init(struct drm_device *dev,
 				    struct amdgpu_framebuffer *rfb,
 				    const struct drm_mode_fb_cmd2 *mode_cmd,
 				    struct drm_gem_object *obj)
 {
 	int ret, i;
+	rfb->base.obj[0] = obj;
+	drm_helper_mode_fill_fb_struct(dev, &rfb->base, mode_cmd);
+	ret = drm_framebuffer_init(dev, &rfb->base, &amdgpu_fb_funcs);
+	if (ret)
+		goto fail;
 
 	/*
 	 * This needs to happen before modifier conversion as that might change
@@ -936,13 +891,13 @@ int amdgpu_display_framebuffer_init(struct drm_device *dev,
 			drm_dbg_kms(dev, "Plane 0 and %d have different BOs: %u vs. %u\n",
 				    i, mode_cmd->handles[0], mode_cmd->handles[i]);
 			ret = -EINVAL;
-			return ret;
+			goto fail;
 		}
 	}
 
 	ret = amdgpu_display_get_fb_info(rfb, &rfb->tiling_flags, &rfb->tmz_surface);
 	if (ret)
-		return ret;
+		goto fail;
 
 	if (dev->mode_config.allow_fb_modifiers &&
 	    !(rfb->base.flags & DRM_MODE_FB_MODIFIERS)) {
@@ -950,7 +905,7 @@ int amdgpu_display_framebuffer_init(struct drm_device *dev,
 		if (ret) {
 			drm_dbg_kms(dev, "Failed to convert tiling flags 0x%llX to a modifier",
 				    rfb->tiling_flags);
-			return ret;
+			goto fail;
 		}
 	}
 
@@ -961,6 +916,10 @@ int amdgpu_display_framebuffer_init(struct drm_device *dev,
 	}
 
 	return 0;
+
+fail:
+	rfb->base.obj[0] = NULL;
+	return ret;
 }
 
 struct drm_framebuffer *
@@ -995,8 +954,7 @@ amdgpu_display_user_framebuffer_create(struct drm_device *dev,
 		return ERR_PTR(-ENOMEM);
 	}
 
-	ret = amdgpu_display_gem_fb_verify_and_init(dev, amdgpu_fb, file_priv,
-						    mode_cmd, obj);
+	ret = amdgpu_display_framebuffer_init(dev, amdgpu_fb, mode_cmd, obj);
 	if (ret) {
 		kfree(amdgpu_fb);
 		drm_gem_object_put(obj);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
index 4c5c19820d37..24010cacf7d0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
@@ -232,8 +232,8 @@ static int amdgpufb_create(struct drm_fb_helper *helper,
 		goto out;
 	}
 
-	ret = amdgpu_display_gem_fb_init(adev_to_drm(adev), &rfbdev->rfb,
-					 &mode_cmd, gobj);
+	ret = amdgpu_display_framebuffer_init(adev_to_drm(adev), &rfbdev->rfb,
+					      &mode_cmd, gobj);
 	if (ret) {
 		DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 		goto out;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
index cb0b581bbce7..319cb19e1b99 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
@@ -602,14 +602,6 @@ int amdgpu_display_get_crtc_scanoutpos(struct drm_device *dev,
 			int *hpos, ktime_t *stime, ktime_t *etime,
 			const struct drm_display_mode *mode);
 
-int amdgpu_display_gem_fb_init(struct drm_device *dev,
-			       struct amdgpu_framebuffer *rfb,
-			       const struct drm_mode_fb_cmd2 *mode_cmd,
-			       struct drm_gem_object *obj);
-int amdgpu_display_gem_fb_verify_and_init(
-	struct drm_device *dev, struct amdgpu_framebuffer *rfb,
-	struct drm_file *file_priv, const struct drm_mode_fb_cmd2 *mode_cmd,
-	struct drm_gem_object *obj);
 int amdgpu_display_framebuffer_init(struct drm_device *dev,
 				    struct amdgpu_framebuffer *rfb,
 				    const struct drm_mode_fb_cmd2 *mode_cmd,
-- 
2.31.1