From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (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 D1213A926 for ; Mon, 7 Apr 2025 13:03:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744031005; cv=none; b=uE0yn+reA3YeS18xxCVZ3Yxg8pdgTrtoFkLJUaON32F/ZDOgUz2C0byMi9TC2oJf4JPjkCGIvtHnCKB3n+ngqPl9q1ey2sCqEvNTGOB3V7evuGUoEWZKdKAtkqeNVblCL/rgmyWd0iElNd91cfyKm/cJczGJsxZBtEsNyr1n/Ng= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744031005; c=relaxed/simple; bh=RnFytON1oEiOwl7kLssTjnWwvt6YbDHMajfNtWPwXGw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=TtO1w7RPDxxLxwxNkCZP3W1duXNJcVMMrOgkoz8W9k5hmaNkRhDG6K+tlpvSmmnPmTwF4LbUjFhWjEbtbSy8YgX5ZLRHOAOijy6M9kUo9K+tV7DSB0PyfbGPEgIvykBYWpMDrHVdtfAUMMZOuHGrLOrCt+n8aPsPbMOIHi4Hew4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=QaKULHF2; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="QaKULHF2" Received: from pendragon.ideasonboard.com (81-175-209-231.bb.dnainternet.fi [81.175.209.231]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 154B7236; Mon, 7 Apr 2025 15:01:25 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1744030885; bh=RnFytON1oEiOwl7kLssTjnWwvt6YbDHMajfNtWPwXGw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=QaKULHF2Ddzs5ZgvY6rIEiizhuv8sBkbees4KB+AnVd2imw1tB6Wf/dE5AwOb7MzZ XjrMOK/ADmVaXiB4tJH3IbDLzlYlg8ucg3OOjy+wrzeyPZBRT9JmNJiEwSS4WEEMYW IA8l6aciwm1JP5orhPx5BdZdOf2YohHZkdohaGLM= Date: Mon, 7 Apr 2025 16:02:57 +0300 From: Laurent Pinchart To: Tarang Raval Cc: "dri-devel@lists.freedesktop.org" , "imx@lists.linux.dev" Subject: Re: Need Help Enabling HDMI on Debix Model A Message-ID: <20250407130257.GD3924@pendragon.ideasonboard.com> References: Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Hi Tarang, On Mon, Apr 07, 2025 at 11:10:23AM +0000, Tarang Raval wrote: > Hi Laurent, > > I’m trying to bring up HDMI on the Debix Model A board using the > mainline kernel, but I’m currently facing issues. > > I saw that you tested the patch for HDMI support on this board in > mainline, so I am hoping you could help me figure out what might be > missing. > > To clarify — I'm using the prebuilt image provided by Debix, but I replaced > the kernel image and the device tree (DTS) file in the /boot directory with > ones built from the mainline kernel. > > I’ve enabled the following configurations in the kernel: > CONFIG_DRM_DISPLAY_CONNECTOR=y > CONFIG_DRM_IMX8MP_DW_HDMI_BRIDGE=y > CONFIG_DRM_IMX8MP_HDMI_PVI=y > CONFIG_DRM_IMX_LCDIF=y > CONFIG_PHY_FSL_SAMSUNG_HDMI_PHY=y > > When I boot the board, I see the following HDMI/DRM related logs: > debix@imx8mp-debix:~$ dmesg | grep -iE "drm|hdmi" > [    0.121979] /soc@0/bus@32c00000/display-bridge@32fc4000: Fixed dependency cycle(s) with /soc@0/bus@32c00000/hdmi@32fd8000 > [    0.122164] /soc@0/bus@32c00000/hdmi@32fd8000: Fixed dependency cycle(s) with /soc@0/bus@32c00000/display-bridge@32fc4000 > [    0.127417] /soc@0/bus@32c00000/hdmi@32fd8000: Fixed dependency cycle(s) with /hdmi-connector > [    0.127608] /hdmi-connector: Fixed dependency cycle(s) with /soc@0/bus@32c00000/hdmi@32fd8000 > [    1.947962] imx8mp-dw-hdmi-tx 32fd8000.hdmi: Detected HDMI TX controller v2.13a with HDCP (SAMSUNG HDMI TX PHY) > [    1.949220] imx8mp-dw-hdmi-tx 32fd8000.hdmi: registered DesignWare HDMI I2C bus driver > [    1.956365] [drm] Initialized imx-lcdif 1.0.0 for 32fc6000.display-controller on minor 0 > [    2.016601] imx-lcdif 32fc6000.display-controller: [drm] fb0: imx-lcdifdrmfb frame buffer device > [    8.380915] systemd[1]: Starting Load Kernel Module drm... > > > I also checked that the display's modeline is recognized under sysfs : > > root@imx8mp-debix:~# ls /sys/class/drm/card0-HDMI-A-1/ > connector_id  dpms          modes         subsystem/    > ddc/          edid          power/        uevent        > device/       enabled       status        > > However, there is still no HDMI output on the display. Instead, > I only see a white blinking cursor on the screen.. I'm not sure > what I'm missing. The white blinking cursor means the display is working from the kernel point of view. What are you expecting, are you running an X server or Wayland compositor ? > Could you please help me out or point me in the right direction? > > Thank you for your time. > > Best Regards, > Tarang -- Regards, Laurent Pinchart