From: Mark Yacoub <markyacoub@xxxxxxxxxx>
To initialize the framebuffer, use drm_gem_fb_init_with_funcs which
verifies that the BO size can fit the FB size by calculating the minimum
expected size of each plane.
The bug was caught using igt-gpu-tools test: kms_addfb_basic.too-high
and kms_addfb_basic.bo-too-small
Tested on ChromeOS Zork by turning on the display and running a YT
video.
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: "Christian König" <christian.koenig@xxxxxxx>
Cc: Sean Paul <seanpaul@xxxxxxxxxxxx>
Signed-off-by: Mark Yacoub <markyacoub@xxxxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 66 ++++++++++++++++-----
drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c | 4 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 8 +++
3 files changed, 62 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
index 48cb33e5b3826..554038e5bbf6a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
@@ -870,18 +870,59 @@ static int amdgpu_display_get_fb_info(const struct amdgpu_framebuffer *amdgpu_fb
return r;
}
-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 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, i;
+ 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 fail;
+ 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;
/*
* This needs to happen before modifier conversion as that might change
* the number of planes.
@@ -891,13 +932,13 @@ 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;
- goto fail;
+ return ret;
}
}
ret = amdgpu_display_get_fb_info(rfb, &rfb->tiling_flags, &rfb->tmz_surface);
if (ret)
- goto fail;
+ return ret;
if (dev->mode_config.allow_fb_modifiers &&
!(rfb->base.flags & DRM_MODE_FB_MODIFIERS)) {
@@ -905,7 +946,7 @@ 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);
- goto fail;
+ return ret;
}
}
@@ -915,10 +956,6 @@ int amdgpu_display_framebuffer_init(struct drm_device *dev,
}
return 0;
-
-fail:
- rfb->base.obj[0] = NULL;
- return ret;
}
struct drm_framebuffer *
@@ -953,7 +990,8 @@ amdgpu_display_user_framebuffer_create(struct drm_device *dev,
return ERR_PTR(-ENOMEM);
}
- ret = amdgpu_display_framebuffer_init(dev, amdgpu_fb, mode_cmd, obj);
+ ret = amdgpu_display_gem_fb_verify_and_init(dev, amdgpu_fb, file_priv,
+ 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 0bf7d36c6686d..22157bd7017c9 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_framebuffer_init(adev_to_drm(adev), &rfbdev->rfb,
- &mode_cmd, gobj);
+ ret = amdgpu_display_gem_fb_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 319cb19e1b99f..cb0b581bbce7b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
@@ -602,6 +602,14 @@ 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,
--
2.30.1.766.gb4fecdf3b7-goog
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