Re: [PATCH] drm/vkms: Add kerneldoc entry

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On Fri, Sep 07, 2018 at 08:41:36PM +0300, Haneen Mohammed wrote:
> Add an initial kerneldoc entry for vkms with a todo list.
> 
> Signed-off-by: Haneen Mohammed <hamohammed.sa@xxxxxxxxx>
> ---
>  Documentation/gpu/drivers.rst   |  1 +
>  Documentation/gpu/todo.rst      | 12 ------------
>  Documentation/gpu/vkms.rst      | 21 +++++++++++++++++++++
>  drivers/gpu/drm/vkms/vkms_drv.c |  9 +++++++++
>  4 files changed, 31 insertions(+), 12 deletions(-)
>  create mode 100644 Documentation/gpu/vkms.rst
> 
> diff --git a/Documentation/gpu/drivers.rst b/Documentation/gpu/drivers.rst
> index 65be325bf282..7d2d3875ff1a 100644
> --- a/Documentation/gpu/drivers.rst
> +++ b/Documentation/gpu/drivers.rst
> @@ -13,6 +13,7 @@ GPU Driver Documentation
>     tve200
>     v3d
>     vc4
> +   vkms
>     bridge/dw-hdmi
>     xen-front
>  
> diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst
> index a7c150d6b63f..f8dfa603e89f 100644
> --- a/Documentation/gpu/todo.rst
> +++ b/Documentation/gpu/todo.rst
> @@ -398,18 +398,6 @@ the non-i915 specific modeset tests.
>  
>  Contact: Daniel Vetter
>  
> -Create a virtual KMS driver for testing (vkms)
> -----------------------------------------------
> -
> -With all the latest helpers it should be fairly simple to create a virtual KMS
> -driver useful for testing, or for running X or similar on headless machines
> -(to be able to still use the GPU). This would be similar to vgem, but aimed at
> -the modeset side.
> -
> -Once the basics are there there's tons of possibilities to extend it.
> -
> -Contact: Daniel Vetter

I've changed this to instead point at the vkms todo list, so we still have
an entry for this here. And then applied your patch.

Cursor patches also applied now, thanks.

Aside: Do you have any plans to continue working on this, i.e. in need of
commit rights?

Cheers, Daniel
> -
>  Driver Specific
>  ===============
>  
> diff --git a/Documentation/gpu/vkms.rst b/Documentation/gpu/vkms.rst
> new file mode 100644
> index 000000000000..58bce5f4ec0a
> --- /dev/null
> +++ b/Documentation/gpu/vkms.rst
> @@ -0,0 +1,21 @@
> +==========================================
> + drm/vkms Virtual Kernel Modesetting
> +==========================================
> +
> +.. kernel-doc:: drivers/gpu/drm/vkms/vkms_drv.c
> +   :doc: vkms (Virtual Kernel Modesetting)
> +
> +TODO
> +====
> +
> +CRC API
> +-------
> +
> +- Optimize CRC computation ``compute_crc()`` and plane blending ``blend()``
> +
> +- Use the alpha value to blend vaddr_src with vaddr_dst instead of
> +  overwriting it in ``blend()``.
> +
> +- Add igt test to check cleared alpha value for XRGB plane format.
> +
> +- Add igt test to check extreme alpha values i.e. fully opaque and fully transparent (intermediate values are affected by hw-specific rounding modes).
> diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
> index 7ce9a76fb940..73cd11845973 100644
> --- a/drivers/gpu/drm/vkms/vkms_drv.c
> +++ b/drivers/gpu/drm/vkms/vkms_drv.c
> @@ -5,6 +5,15 @@
>   * (at your option) any later version.
>   */
>  
> +/**
> + * DOC: vkms (Virtual Kernel Modesetting)
> + *
> + * vkms is a software-only model of a kms driver that is useful for testing,
> + * or for running X (or similar) on headless machines and be able to still
> + * use the GPU. vkms aims to enable a virtual display without the need for
> + * a hardware display capability.
> + */
> +
>  #include <linux/module.h>
>  #include <drm/drm_gem.h>
>  #include <drm/drm_crtc_helper.h>
> -- 
> 2.17.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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