linux-kernel - Re: [PATCH v2] drm/vkms: Creating a debug file to get/track vkms config in vkms

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Date:   Thu, 8 Jul 2021 21:57:35 +0100
From:   Melissa Wen <melissa.srw@...il.com>
To:     Beatriz Martins de Carvalho <martinsdecarvalhobeatriz@...il.com>
Cc:     rodrigosiqueiramelo@...il.com, hamohammed.sa@...il.com,
        daniel@...ll.ch, airlied@...ux.ie, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v2] drm/vkms: Creating a debug file to get/track vkms
 config in vkms_drv.c

On 07/08, Beatriz Martins de Carvalho wrote:
> Creating a vkms_config_debufs file in vkms_drv.c to get/track vkms config
> data, for the long-term plan of making vkms configurable and have multiple
> different instances.
> 
> Reviewed-by: Melissa Wen <melissa.srw@...il.com>
> Signed-off-by: Beatriz Martins de Carvalho <martinsdecarvalhobeatriz@...il.com>
Applied to drm-misc-next.
Small issues in the message were handled when applying.

Thanks,

Melissa
> ---
> Changes in v2:
>     - corrected subject to make clear in terms of its purpose
>     - corrected commit message
> ---
>  drivers/gpu/drm/vkms/vkms_drv.c | 28 ++++++++++++++++++++++++++++
>  1 file changed, 28 insertions(+)
> 
> diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
> index 027ffe759440..c81fba6c72f0 100644
> --- a/drivers/gpu/drm/vkms/vkms_drv.c
> +++ b/drivers/gpu/drm/vkms/vkms_drv.c
> @@ -28,6 +28,9 @@
>  
>  #include "vkms_drv.h"
>  
> +#include <drm/drm_print.h>
> +#include <drm/drm_debugfs.h>
> +
>  #define DRIVER_NAME	"vkms"
>  #define DRIVER_DESC	"Virtual Kernel Mode Setting"
>  #define DRIVER_DATE	"20180514"
> @@ -86,12 +89,37 @@ static void vkms_atomic_commit_tail(struct drm_atomic_state *old_state)
>  	drm_atomic_helper_cleanup_planes(dev, old_state);
>  }
>  
> +static int vkms_config_show(struct seq_file *m, void *data)
> +{
> +	struct drm_info_node *node = (struct drm_info_node *)m->private;
> +	struct drm_device *dev = node->minor->dev;
> +	struct vkms_device *vkmsdev = drm_device_to_vkms_device(dev);
> +
> +	seq_printf(m, "writeback=%d\n", vkmsdev->config->writeback);
> +	seq_printf(m, "cursor=%d\n", vkmsdev->config->cursor);
> +	seq_printf(m, "overlay=%d\n", vkmsdev->config->overlay);
> +
> +	return 0;
> +}
> +
> +static const struct drm_info_list vkms_config_debugfs_list[] = {
> +	{ "vkms_config", vkms_config_show, 0 },
> +};
> +
> +static void vkms_config_debugfs_init(struct drm_minor *minor)
> +{
> +	drm_debugfs_create_files(vkms_config_debugfs_list, ARRAY_SIZE(vkms_config_debugfs_list),
> +				 minor->debugfs_root, minor);
> +}
> +
>  static const struct drm_driver vkms_driver = {
>  	.driver_features	= DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_GEM,
>  	.release		= vkms_release,
>  	.fops			= &vkms_driver_fops,
>  	DRM_GEM_SHMEM_DRIVER_OPS,
>  
> +	.debugfs_init           = vkms_config_debugfs_init,
> +
>  	.name			= DRIVER_NAME,
>  	.desc			= DRIVER_DESC,
>  	.date			= DRIVER_DATE,
> -- 
> 2.25.1
>