From patchwork Wed Oct 19 14:25:36 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 9384119 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 6B3B7607D0 for ; Wed, 19 Oct 2016 14:26:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5D29229A36 for ; Wed, 19 Oct 2016 14:26:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 51C4529A42; Wed, 19 Oct 2016 14:26:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8D07E29A36 for ; Wed, 19 Oct 2016 14:26:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S941552AbcJSOZ4 (ORCPT ); Wed, 19 Oct 2016 10:25:56 -0400 Received: from galahad.ideasonboard.com ([185.26.127.97]:35121 "EHLO galahad.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S941629AbcJSOZv (ORCPT ); Wed, 19 Oct 2016 10:25:51 -0400 Received: from localhost.localdomain (37-136-126-33.rev.dnainternet.fi [37.136.126.33]) by galahad.ideasonboard.com (Postfix) with ESMTPSA id 123212005E; Wed, 19 Oct 2016 16:25:00 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1476887100; bh=rRx1ZuvyfS9g4l/zscIbWSBZpaozJ13uWn6gXdpx2tM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aoafzv5YG4NcNVGWgCbbkk0BL0n8pxHtT9V56/fR/ho3pUkcKxbq4CiakvtGj1GCS 3Rvz5V8nk4wTopT1KlBSBrKKjvTNTifmbjk9U/cYESWqbHgyzBAPWZCeQ0nR3kt1aQ VrDmRc+CiDzmc9JgknYVeHOmj1OB5+UogiXXjB44= From: Laurent Pinchart To: dri-devel@lists.freedesktop.org Cc: linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH 1/8] drm: bridge: Add LVDS encoder driver Date: Wed, 19 Oct 2016 17:25:36 +0300 Message-Id: <1476887143-24831-2-git-send-email-laurent.pinchart+renesas@ideasonboard.com> X-Mailer: git-send-email 2.7.3 In-Reply-To: <1476887143-24831-1-git-send-email-laurent.pinchart+renesas@ideasonboard.com> References: <1476887143-24831-1-git-send-email-laurent.pinchart+renesas@ideasonboard.com> Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The LVDS encoder driver is a DRM bridge driver that supports the parallel to LVDS encoders that don't require any configuration. The driver thus doesn't interact with the device, but creates an LVDS connector for the panel and exposes its size and timing based on information retrieved from DT. Cc: devicetree@vger.kernel.org Signed-off-by: Laurent Pinchart Acked-by: Rob Herring --- .../bindings/display/bridge/lvds-transmitter.txt | 64 +++++++ drivers/gpu/drm/bridge/Kconfig | 8 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/lvds-encoder.c | 203 +++++++++++++++++++++ 4 files changed, 276 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/bridge/lvds-transmitter.txt create mode 100644 drivers/gpu/drm/bridge/lvds-encoder.c diff --git a/Documentation/devicetree/bindings/display/bridge/lvds-transmitter.txt b/Documentation/devicetree/bindings/display/bridge/lvds-transmitter.txt new file mode 100644 index 000000000000..fd39ad34c383 --- /dev/null +++ b/Documentation/devicetree/bindings/display/bridge/lvds-transmitter.txt @@ -0,0 +1,64 @@ +Parallel to LVDS Encoder +------------------------ + +This binding supports the parallel to LVDS encoders that don't require any +configuration. + +LVDS is a physical layer specification defined in ANSI/TIA/EIA-644-A. Multiple +incompatible data link layers have been used over time to transmit image data +to LVDS panels. This binding targets devices compatible with the following +specifications only. + +[JEIDA] "Digital Interface Standards for Monitor", JEIDA-59-1999, February +1999 (Version 1.0), Japan Electronic Industry Development Association (JEIDA) +[LDI] "Open LVDS Display Interface", May 1999 (Version 0.95), National +Semiconductor +[VESA] "VESA Notebook Panel Standard", October 2007 (Version 1.0), Video +Electronics Standards Association (VESA) + +Those devices have been marketed under the FPD-Link and FlatLink brand names +among others. + + +Required properties: + +- compatible: Must be "lvds-encoder" + +Required nodes: + +This device has two video ports. Their connections are modeled using the OF +graph bindings specified in Documentation/devicetree/bindings/graph.txt. + +- Video port 0 for parallel input +- Video port 1 for LVDS output + + +Example +------- + +lvds-encoder { + compatible = "lvds-encoder"; + #address-cells = <1>; + #size-cells = <0>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + + lvds_enc_in: endpoint { + remote-endpoint = <&display_out_rgb>; + }; + }; + + port@1 { + reg = <1>; + + lvds_enc_out: endpoint { + remote-endpoint = <&lvds_panel_in>; + }; + }; + }; +}; diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index 10e12e74fc9f..5dafad7817ad 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -24,6 +24,14 @@ config DRM_DUMB_VGA_DAC help Support for RGB to VGA DAC based bridges +config DRM_LVDS_ENCODER + tristate "Transparent parallel to LVDS encoder support" + depends on OF + select DRM_KMS_HELPER + help + Support for transparent parallel to LVDS encoders that don't require + any configuration. + config DRM_DW_HDMI tristate select DRM_KMS_HELPER diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index cdf3a3cf765d..bbaf583581ac 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -2,6 +2,7 @@ ccflags-y := -Iinclude/drm obj-$(CONFIG_DRM_ANALOGIX_ANX78XX) += analogix-anx78xx.o obj-$(CONFIG_DRM_DUMB_VGA_DAC) += dumb-vga-dac.o +obj-$(CONFIG_DRM_LVDS_ENCODER) += lvds-encoder.o obj-$(CONFIG_DRM_DW_HDMI) += dw-hdmi.o obj-$(CONFIG_DRM_DW_HDMI_AHB_AUDIO) += dw-hdmi-ahb-audio.o obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o diff --git a/drivers/gpu/drm/bridge/lvds-encoder.c b/drivers/gpu/drm/bridge/lvds-encoder.c new file mode 100644 index 000000000000..33e8025c8a6d --- /dev/null +++ b/drivers/gpu/drm/bridge/lvds-encoder.c @@ -0,0 +1,203 @@ +/* + * Copyright (C) 2016 Laurent Pinchart + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + */ + +#include +#include +#include +#include +#include +#include + +#include + +#include