linux-kernel - [PATCH] drm: Drop select FRAMEBUFFER_CONSOLE for DRM_FBDEV

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Date:   Fri,  4 Aug 2023 14:51:43 +0200
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     Arnd Bergmann <arnd@...db.de>,
        Arthur Grillo <arthurgrillo@...eup.net>,
        Randy Dunlap <rdunlap@...radead.org>,
        Javier Martinez Canillas <javierm@...hat.com>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...il.com>, Helge Deller <deller@....de>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH] drm: Drop select FRAMEBUFFER_CONSOLE for DRM_FBDEV_EMULATION

The commit c242f48433e7 ("drm: Make FB_CORE to be selected if DRM fbdev
emulation is enabled") changed DRM_FBDEV_EMULATION from 'depends on FB'
to an effective 'select FB_CORE', so any config that previously had DRM=y
and FB=n now has FB_CORE=y and FRAMEBUFFER_CONSOLE=y.

This leads to unmet direct dependencies detected for FRAMEBUFFER_CONSOLE
as reported by Arthur Grillo, e.g:

WARNING: unmet direct dependencies detected for FRAMEBUFFER_CONSOLE
  Depends on [n]: VT [=n] && FB_CORE [=y] && !UML [=y]
  Selected by [y]:
  - DRM_FBDEV_EMULATION [=y] && HAS_IOMEM [=y] && DRM [=y] && !EXPERT [=n]

Arnd Bergmann suggests to drop the select FRAMEBUFFER_CONSOLE for the
DRM_FBDEV_EMULATION Kconfig symbol, since a possible use case could
be to enable DRM fbdev emulation but without a framebuffer console.

Fixes: c242f48433e7 ("drm: Make FB_CORE to be selected if DRM fbdev emulation is enabled")
Reported-by: Arthur Grillo <arthurgrillo@...eup.net>
Closes: https://lore.kernel.org/dri-devel/20230726220325.278976-1-arthurgrillo@riseup.net
Suggested-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>
---

 drivers/gpu/drm/Kconfig | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index b51c6a141dfa..2a44b9419d4d 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -135,7 +135,6 @@ config DRM_DEBUG_MODESET_LOCK
 config DRM_FBDEV_EMULATION
 	bool "Enable legacy fbdev support for your modesetting driver"
 	depends on DRM
-	select FRAMEBUFFER_CONSOLE if !EXPERT
 	select FRAMEBUFFER_CONSOLE_DETECT_PRIMARY if FRAMEBUFFER_CONSOLE
 	default y
 	help
-- 
2.41.0