From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail11.truemail.it (mail11.truemail.it [217.194.8.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 808AC30DEBD for ; Fri, 19 Dec 2025 11:17:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.194.8.81 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766143042; cv=none; b=qI2SXmDVx0WbkTEwPCujrmkNMzKwmMeb/uKhdI0ibfa77EIALqpge6GshJirLdQFcAsU59NFwZu/EncZ6xEimWwFCcMN9cp4pG3rU38ccnQayDM2EJhipjB1V8fhlwiWPPLD/gXRoApWZGoo9g25jcLlSr58n7v5uoUDjDaXa7Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766143042; c=relaxed/simple; bh=aMyANDMZNbijssuCOBuDwEbvD6viarzbnnLrgjQfptA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=H9jrmOSdNmDTymnh1JGaeMXJGc5+F5lub9u5d0XxiqzL+xB7pObX83sAjYjcRtnT1Oe+wlrmTR/E9RCwwLlOhRVUjok9rOCH51qcphVQCxCRyz1oL+HoHQREh4td4nFjA0eoL1a67a0Y807ALfuo7YXRKCjTaP2IPQaU5BUVhB4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=dolcini.it; spf=pass smtp.mailfrom=dolcini.it; dkim=pass (2048-bit key) header.d=dolcini.it header.i=@dolcini.it header.b=ydt4cOrE; arc=none smtp.client-ip=217.194.8.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=dolcini.it Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=dolcini.it Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=dolcini.it header.i=@dolcini.it header.b="ydt4cOrE" Received: from francesco-nb (93-49-2-63.ip317.fastwebnet.it [93.49.2.63]) by mail11.truemail.it (Postfix) with ESMTPA id C957B21292; Fri, 19 Dec 2025 12:17:17 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dolcini.it; s=default; t=1766143038; bh=TjeBoAfkVklfbQ/yXh10GPoy8tL4lDWsTndmfjMKrxs=; h=From:To:Subject; b=ydt4cOrErz4HuAMCIJV8UK0RR4PV+Xr5J7C23gSWjMI+084RBBwi1KRWS6ddWDt7W 09/8tLCvKRbFZL6oWtxckck7CgHoy8S118TIUGRMmP1M03nLnVvneAIWcSP4HTnA4O H62fJsNMy5TffwNa0ym20Mmo/mcMqJs3UghRPxFoy2hDz+a796TCOEzMfobKqBGiWm tTwd5W+kSOkQuThZqcFlPs8ZbN9vltFSv5PI6I/z6FBD+c4BM/dm4IZM0OWfyNonpC ofN7MKGCX3YLo3CohR7Ln4VRMc/OKrtfXbaklEUCgr6EL7j3I9b6Zw3/v127yq4vrQ 6XFF4aa9HXAaA== Date: Fri, 19 Dec 2025 12:17:16 +0100 From: Francesco Dolcini To: Tomi Valkeinen Cc: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Parth Pancholi , Francesco Dolcini , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 7/7] drm/bridge: tc358768: Add support for long command tx via video buffer Message-ID: <20251219111716.GG39796@francesco-nb> References: <20251021-tc358768-v1-0-d590dc6a1a0c@ideasonboard.com> <20251021-tc358768-v1-7-d590dc6a1a0c@ideasonboard.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251021-tc358768-v1-7-d590dc6a1a0c@ideasonboard.com> On Tue, Oct 21, 2025 at 04:23:03PM +0300, Tomi Valkeinen wrote: > TC358768 has two ways to send DSI commands: 1) buffer the payload data > into registers (DSICMD_WDx), which supports up to 8 bytes of payload, 2) > buffer the payload data into the video buffer, which supports up to 1024 > bytes of payload. > > The driver currently supports method 1). > > Add support for transmitting long DSI commands (more than 8 bytes, up to > 1024 bytes) using the video buffer. This mode can only be used before > the actual video transmission is enabled, i.e. the initial configuration. > > Original version from Parth Pancholi > > Signed-off-by: Tomi Valkeinen Reviewed-by: Francesco Dolcini