[PATCH 0/3] drm: some qemu driver unload fixes.

[PATCH 0/3] drm: some qemu driver unload fixes.

[Gerd Hoffmann]

Gerd Hoffmann (3):
  drm/virtio: add missing drm_atomic_helper_shutdown() call.
  drm/bochs: add missing drm_atomic_helper_shutdown() call.
  drm/cirrus: add missing drm_helper_force_disable_all() call.

 drivers/gpu/drm/bochs/bochs_kms.c        | 1 +
 drivers/gpu/drm/cirrus/cirrus_mode.c     | 1 +
 drivers/gpu/drm/virtio/virtgpu_display.c | 1 +
 3 files changed, 3 insertions(+)

-- 
2.18.1

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[PATCH 1/3] drm/virtio: add missing drm_atomic_helper_shutdown() call.

[Gerd Hoffmann]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/virtio/virtgpu_display.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/virtio/virtgpu_display.c b/drivers/gpu/drm/virtio/virtgpu_display.c
index 653ec7d0bf4d..86843a4d6102 100644
--- a/drivers/gpu/drm/virtio/virtgpu_display.c
+++ b/drivers/gpu/drm/virtio/virtgpu_display.c
@@ -385,5 +385,6 @@ void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev)
 
 	for (i = 0 ; i < vgdev->num_scanouts; ++i)
 		kfree(vgdev->outputs[i].edid);
+	drm_atomic_helper_shutdown(vgdev->ddev);
 	drm_mode_config_cleanup(vgdev->ddev);
 }
-- 
2.18.1

Re: [PATCH 1/3] drm/virtio: add missing drm_atomic_helper_shutdown() call.

[Mukesh Ojha]

Please atleast mention here why it is required?

-Mukesh

On 4/1/2019 7:33 PM, Gerd Hoffmann wrote:
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> ---
>   drivers/gpu/drm/virtio/virtgpu_display.c | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/virtio/virtgpu_display.c b/drivers/gpu/drm/virtio/virtgpu_display.c
> index 653ec7d0bf4d..86843a4d6102 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_display.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_display.c
> @@ -385,5 +385,6 @@ void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev)
>   
>   	for (i = 0 ; i < vgdev->num_scanouts; ++i)
>   		kfree(vgdev->outputs[i].edid);
> +	drm_atomic_helper_shutdown(vgdev->ddev);
>   	drm_mode_config_cleanup(vgdev->ddev);
>   }

[PATCH 2/3] drm/bochs: add missing drm_atomic_helper_shutdown() call.

[Gerd Hoffmann]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/bochs/bochs_kms.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/bochs/bochs_kms.c b/drivers/gpu/drm/bochs/bochs_kms.c
index 9e7cd6b34106..93cb27f93d39 100644
--- a/drivers/gpu/drm/bochs/bochs_kms.c
+++ b/drivers/gpu/drm/bochs/bochs_kms.c
@@ -293,6 +293,7 @@ int bochs_kms_init(struct bochs_device *bochs)
 void bochs_kms_fini(struct bochs_device *bochs)
 {
 	if (bochs->mode_config_initialized) {
+		drm_atomic_helper_shutdown(bochs->dev);
 		drm_mode_config_cleanup(bochs->dev);
 		bochs->mode_config_initialized = false;
 	}
-- 
2.18.1

Re: [PATCH 2/3] drm/bochs: add missing drm_atomic_helper_shutdown() call.

[Daniel Vetter]

On Mon, Apr 01, 2019 at 04:03:05PM +0200, Gerd Hoffmann wrote:
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> ---
>  drivers/gpu/drm/bochs/bochs_kms.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/bochs/bochs_kms.c b/drivers/gpu/drm/bochs/bochs_kms.c
> index 9e7cd6b34106..93cb27f93d39 100644
> --- a/drivers/gpu/drm/bochs/bochs_kms.c
> +++ b/drivers/gpu/drm/bochs/bochs_kms.c
> @@ -293,6 +293,7 @@ int bochs_kms_init(struct bochs_device *bochs)
>  void bochs_kms_fini(struct bochs_device *bochs)
>  {
>  	if (bochs->mode_config_initialized) {

This mode_config_initialized is hilarious. I think (from looking at git
history and all) this started in radeon, back when kms was an add-on, and
radeon.ko still supported ums. Then it was dutifully copypasted into
cirrus, bochs, mgag200, hisilicon and also amdgpu.

Afaict none of these drivers need this (but I didn't bother to review
amdgpu and radeon fully). Would be nice little cleanup to follow up with.

Anyway, on your 3 patches here:

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

> +		drm_atomic_helper_shutdown(bochs->dev);
>  		drm_mode_config_cleanup(bochs->dev);
>  		bochs->mode_config_initialized = false;
>  	}
> -- 
> 2.18.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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[PATCH 3/3] drm/cirrus: add missing drm_helper_force_disable_all() call.

[Gerd Hoffmann]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/cirrus/cirrus_mode.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/cirrus/cirrus_mode.c b/drivers/gpu/drm/cirrus/cirrus_mode.c
index 7f9bc32af685..32ce2c1040b4 100644
--- a/drivers/gpu/drm/cirrus/cirrus_mode.c
+++ b/drivers/gpu/drm/cirrus/cirrus_mode.c
@@ -615,6 +615,7 @@ void cirrus_modeset_fini(struct cirrus_device *cdev)
 	cirrus_fbdev_fini(cdev);
 
 	if (cdev->mode_info.mode_config_initialized) {
+		drm_helper_force_disable_all(cdev->dev);
 		drm_mode_config_cleanup(cdev->dev);
 		cdev->mode_info.mode_config_initialized = false;
 	}
-- 
2.18.1