[PATCH] drm/vmwgfx: Fix a boot time warning

[PATCH] drm/vmwgfx: Fix a boot time warning

[Thomas Hellstrom]

From: Woody Suwalski <terraluna977@gmail.com>

The 4.15 vmwgfx driver shows a warning during boot.
It is caused by a mismatch between the result of vmw_enable_vblank()
and what the drm_atomic_helper expects.

Signed-off by: Woody Suwalski <terraluna977@gmail.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
---
 drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index 641294a..fcd5814 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -1863,7 +1863,7 @@ u32 vmw_get_vblank_counter(struct drm_device *dev, unsigned int pipe)
  */
 int vmw_enable_vblank(struct drm_device *dev, unsigned int pipe)
 {
-	return -ENOSYS;
+	return -EINVAL;
 }
 
 /**
-- 
2.7.4

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Re: [PATCH] drm/vmwgfx: Fix a boot time warning

[Daniel Vetter]

On Wed, Jan 17, 2018 at 09:21:25AM +0100, Thomas Hellstrom wrote:
> From: Woody Suwalski <terraluna977@gmail.com>
> 
> The 4.15 vmwgfx driver shows a warning during boot.
> It is caused by a mismatch between the result of vmw_enable_vblank()
> and what the drm_atomic_helper expects.
> 
> Signed-off by: Woody Suwalski <terraluna977@gmail.com>
> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>

Just curious question, but why do you even have all that code? Not
enabling any of the vblank stuff should also work with atomic drivers, and
would require much less boilerplate ...

Either way: Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> ---
>  drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
> index 641294a..fcd5814 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
> @@ -1863,7 +1863,7 @@ u32 vmw_get_vblank_counter(struct drm_device *dev, unsigned int pipe)
>   */
>  int vmw_enable_vblank(struct drm_device *dev, unsigned int pipe)
>  {
> -	return -ENOSYS;
> +	return -EINVAL;
>  }
>  
>  /**
> -- 
> 2.7.4
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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Re: [PATCH] drm/vmwgfx: Fix a boot time warning

[Thomas Hellstrom]

On 01/17/2018 09:47 AM, Daniel Vetter wrote:
> On Wed, Jan 17, 2018 at 09:21:25AM +0100, Thomas Hellstrom wrote:
>> From: Woody Suwalski <terraluna977@gmail.com>
>>
>> The 4.15 vmwgfx driver shows a warning during boot.
>> It is caused by a mismatch between the result of vmw_enable_vblank()
>> and what the drm_atomic_helper expects.
>>
>> Signed-off by: Woody Suwalski <terraluna977@gmail.com>
>> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
> Just curious question, but why do you even have all that code? Not
> enabling any of the vblank stuff should also work with atomic drivers, and
> would require much less boilerplate ...
>
> Either way: Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

To be honest, nobody here has really looked at exactly what parts are 
needed when we don't have the vblank interrupt.
We'll put that on the to-do list.

Thanks,

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