linux-kernel - Re: [PATCH 1/3] drm/panic: Add drm_panic_is

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Message-ID: <8734o85o5l.fsf@minerva.mail-host-address-is-not-set>
Date: Wed, 17 Jul 2024 12:05:42 +0200
From: Javier Martinez Canillas <javierm@...hat.com>
To: Jocelyn Falempe <jfalempe@...hat.com>, Maarten Lankhorst
 <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>,
 Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>,
 Daniel Vetter <daniel@...ll.ch>, Helge Deller <deller@....de>, "Jiri Slaby
 (SUSE)" <jirislaby@...nel.org>, Greg Kroah-Hartman
 <gregkh@...uxfoundation.org>, Geert Uytterhoeven
 <geert+renesas@...der.be>, Samuel Thibault <samuel.thibault@...-lyon.org>,
 Jocelyn Falempe <jfalempe@...hat.com>, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org, linux-fbdev@...r.kernel.org
Subject: Re: [PATCH 1/3] drm/panic: Add drm_panic_is_enabled()

Jocelyn Falempe <jfalempe@...hat.com> writes:

Hello Jocelyn,

> It allows to check if the drm device supports drm_panic.
> Prepare the work to have better integration with fbcon and vtconsole.
>
> Signed-off-by: Jocelyn Falempe <jfalempe@...hat.com>
> ---
>  drivers/gpu/drm/drm_panic.c | 20 ++++++++++++++++++++
>  include/drm/drm_panic.h     |  2 ++
>  2 files changed, 22 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c
> index 948aed00595e..d9a25c2d0a65 100644
> --- a/drivers/gpu/drm/drm_panic.c
> +++ b/drivers/gpu/drm/drm_panic.c
> @@ -703,6 +703,26 @@ static void debugfs_register_plane(struct drm_plane *plane, int index)
>  static void debugfs_register_plane(struct drm_plane *plane, int index) {}
>  #endif /* CONFIG_DRM_PANIC_DEBUG */
>  
> +/**
> + * drm_panic_is_enabled
> + * @dev: the drm device that may supports drm_panic
> + *
> + * returns true if the drm device supports drm_panic
> + */
> +bool drm_panic_is_enabled(struct drm_device *dev)
> +{
> +	struct drm_plane *plane;
> +
> +	if (!dev->mode_config.num_total_plane)
> +		return false;
> +
> +	drm_for_each_plane(plane, dev)
> +		if (plane->helper_private && plane->helper_private->get_scanout_buffer)
> +			return true;
> +	return false;
> +}
> +EXPORT_SYMBOL(drm_panic_is_enabled);
> +

Reviewed-by: Javier Martinez Canillas <javierm@...hat.com>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat