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[222.152.170.159]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-cc13c036c50sm311257a12.26.2026.08.17.00.49.56 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Aug 2026 00:50:00 -0700 (PDT) Subject: Re: [PATCH v2 2/5] fbdev: Give atafb proper parent To: Thomas Zimmermann , linux-m68k@vger.kernel.org, geert@linux-m68k.org References: <20260816073752.16656-1-schmitzmic@gmail.com> <20260816073752.16656-3-schmitzmic@gmail.com> Cc: Miro Kropacek , linux-fbdev@vger.kernel.org From: Michael Schmitz Message-ID: <5a2d0139-84db-cab8-c7fb-7806a71c53b2@gmail.com> Date: Mon, 17 Aug 2026 19:49:53 +1200 User-Agent: Mozilla/5.0 (X11; Linux ppc; rv:45.0) Gecko/20100101 Icedove/45.4.0 Precedence: bulk X-Mailing-List: linux-m68k@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Hi Thomas, Am 17.08.2026 um 18:34 schrieb Thomas Zimmermann: > Hi > > Am 16.08.26 um 09:37 schrieb Michael Schmitz: >> From: Miro Kropacek >> >> The atafb fb device registers no parent, causing a missing symlink >> (/sys/class/graphics/fb0/device). Xorg fbdevhw driver looks for that >> symlink when scanning for devices, so add a parent node for atafb. > > Do you really have these devices to test with? Not the particular hardware that patches 3 and 4 add support for, but the 'normal' Videl that is found in every Falcon, yes. > If so, could you also replace the hard coded fb_info with a call to > framebuffer_alloc()? Can't see how that would work - fb_info isn't passed to all functions that need to use it, especially in the hardware detection phase (hence the use of a static fb_info struct)? Cheers, Michael >> >> Signed-off-by: Miro Kropacek >> Reviewed-by: Michael Schmitz >> Signed-off-by: Michael Schmitz >> Cc: >> Link: https://lists.debian.org/debian-68k/2026/08/msg00000.html >> --- >> drivers/video/fbdev/atafb.c | 5 +++++ >> 1 file changed, 5 insertions(+) >> >> diff --git a/drivers/video/fbdev/atafb.c b/drivers/video/fbdev/atafb.c >> index b8ed1c537293..3d540803dc2b 100644 >> --- a/drivers/video/fbdev/atafb.c >> +++ b/drivers/video/fbdev/atafb.c >> @@ -3101,6 +3101,11 @@ static int __init atafb_probe(struct >> platform_device *pdev) >> #endif /* ATAFB_EXT */ >> // strcpy(fb_info.mode->name, "Atari Builtin "); >> + /* Parent the fb device properly: without this fb0 registers as a >> + * virtual sysfs device with no /sys/class/graphics/fb0/device link, >> + * which makes Xorg's fbdevhw reject it ("No devices detected"). >> + */ >> + fb_info.device = &pdev->dev; > > Because this is supposed to happen in framebuffer_alloc() and keeping it > there would be preferable. > > Best regards > Thomas > >> fb_info.fbops = &atafb_ops; >> // try to set default (detected; requested) var >> do_fb_set_var(&atafb_predefined[default_par - 1], 1); >