From nobody Fri Dec 19 21:50:44 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 52FC218C936 for ; Wed, 22 Jan 2025 06:47:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737528421; cv=none; b=eX9Miuj/LeegzWnAQaqBQsVGks8htGIGqvsLj5vVOqVJQIKD4DfVh2ke43mvQve1MbwApqKGnd1eWMfRJfj4ucz1foEdPYuthQKt/84Lvc8MfxtrdU11I0/JS0CCqgPow4FRLx4l6Stbk+nB69SuK6mujRPJstRgyKqOS+TDdsk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737528421; c=relaxed/simple; bh=k0TcVNYOkFo0OjNw5zjwtybg6Pjk0UGlNrXTS/BXu8U=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=j1BwCFKXRIJ3AvbGk9HCcT8aa13u3hnqZw+BCVodSdbMQ/EIDKUV1wboHWaeBr66ngaVvtlhPDmIOmCUxx73muDCZabfTq3tnl4L25B3NPVVUJxG9zHCHHUE/vJtsRswAdKlDs5g4CCvFoBc7O84Jg8NCRkdX2D5uPs4avLeEd8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=L0GkzAkF; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="L0GkzAkF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 98C18C4CED6; Wed, 22 Jan 2025 06:46:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737528420; bh=k0TcVNYOkFo0OjNw5zjwtybg6Pjk0UGlNrXTS/BXu8U=; h=From:To:Cc:Subject:Date:From; b=L0GkzAkFCU1pbcxpYLYlPZo23sehZA54Jnrom+v5zCd3hpGrOTDcEKXgEdND64gjV gneHYNuckvL2sSLuLLn2KjOodF9x7YtU7v8KpqKpaTXQtAOGgrp1XIEEoO/azFhm2W 639FDKwJEU5akn+KA/9mNIMIhGItEL618CZxI4d6ui0Xr53AEBh99hxXjA8XPvFzLV F1INLh+px8I1ZiGQJpjRmUu9VXRBhY4pipvjqfriys3AeQhCjc/+la0B1TUkAzOH83 Ze8fbS6RAbzfVq0+NkJ1Y4GPPEDpzMocvAu5JxqaXnQkuk/cFO2xZLpk9w5zkyy38J CbWuhaIuFzssw== From: Arnd Bergmann To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter Cc: Arnd Bergmann , Jocelyn Falempe , Jani Nikula , Geert Uytterhoeven , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH] drm: select DRM_KMS_HELPER from DRM_GEM_SHMEM_HELPER Date: Wed, 22 Jan 2025 07:46:33 +0100 Message-Id: <20250122064655.1095176-1-arnd@kernel.org> X-Mailer: git-send-email 2.39.5 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Arnd Bergmann In the combination of DRM_KMS_HELPER=3Dm, DRM_GEM_SHMEM_HELPER=3Dy, DRM_FBD= EV_EMULATION=3Dy, The shmem code fails to link against the KMS helpers: x86_64-linux-ld: vmlinux.o: in function `drm_fbdev_shmem_driver_fbdev_probe= ': (.text+0xeec601): undefined reference to `drm_fb_helper_alloc_info' x86_64-linux-ld: (.text+0xeec633): undefined reference to `drm_fb_helper_fi= ll_info' x86_64-linux-ld: vmlinux.o: in function `drm_fbdev_shmem_get_page': drm_fbdev_shmem.c:(.text+0xeec7d2): undefined reference to `drm_gem_fb_get_= obj' x86_64-linux-ld: vmlinux.o: in function `drm_fbdev_shmem_fb_mmap': drm_fbdev_shmem.c:(.text+0xeec9f6): undefined reference to `drm_gem_fb_get_= obj' x86_64-linux-ld: vmlinux.o: in function `drm_fbdev_shmem_defio_imageblit': (.rodata+0x5b2288): undefined reference to `drm_fb_helper_check_var' x86_64-linux-ld: (.rodata+0x5b2290): undefined reference to `drm_fb_helper_= set_par' This can happen for a number of device drivers that select DRM_GEM_SHMEM_HE= LPER without also selecting DRM_KMS_HELPER. To work around this, add another sel= ect that forces DRM_KMS_HELPER to be built-in rather than a loadable module, but only if FBDEV emulation is also enabled. Signed-off-by: Arnd Bergmann Reported-by: Marc Kleine-Budde Reviewed-by: Thomas Zimmermann Tested-by: Marc Kleine-Budde --- drivers/gpu/drm/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index 0fe99d440bfa..a8d2dffbc82f 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -311,6 +311,7 @@ config DRM_GEM_SHMEM_HELPER depends on DRM && MMU select FB_CORE if DRM_FBDEV_EMULATION select FB_SYSMEM_HELPERS_DEFERRED if DRM_FBDEV_EMULATION + select DRM_KMS_HELPER if DRM_FBDEV_EMULATION help Choose this if you need the GEM shmem helper functions =20 --=20 2.39.5