From patchwork Wed Mar 27 17:30:35 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philipp Zabel X-Patchwork-Id: 2352301 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork1.kernel.org (Postfix) with ESMTP id EFD573FC8C for ; Wed, 27 Mar 2013 17:39:58 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UKuHT-0001bK-D7; Wed, 27 Mar 2013 17:36:59 +0000 Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UKuBg-0006or-8b for linux-arm-kernel@lists.infradead.org; Wed, 27 Mar 2013 17:31:08 +0000 Received: from dude.hi.pengutronix.de ([10.1.0.7] helo=dude.pengutronix.de) by metis.ext.pengutronix.de with esmtp (Exim 4.72) (envelope-from ) id 1UKuBT-0002io-No; Wed, 27 Mar 2013 18:30:47 +0100 From: Philipp Zabel To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 01/11] staging: drm/imx: Add LDB support Date: Wed, 27 Mar 2013 18:30:35 +0100 Message-Id: <1364405445-5271-2-git-send-email-p.zabel@pengutronix.de> X-Mailer: git-send-email 1.8.2.rc2 In-Reply-To: <1364405445-5271-1-git-send-email-p.zabel@pengutronix.de> References: <1364405445-5271-1-git-send-email-p.zabel@pengutronix.de> X-SA-Exim-Connect-IP: 10.1.0.7 X-SA-Exim-Mail-From: p.zabel@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130327_133100_884009_CD9FC179 X-CRM114-Status: GOOD ( 30.24 ) X-Spam-Score: -3.2 (---) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-3.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -1.3 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: devel@driverdev.osuosl.org, Fabio Estevam , Thomas Petazzoni , Greg Kroah-Hartman , devicetree-discuss@lists.ozlabs.org, kernel@pengutronix.de, Martin Fuzzey , Philipp Zabel , Sean Cross , Shawn Guo , Sascha Hauer X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Sascha Hauer This adds support for the LVDS Display Bridge contained in i.MX5 and i.MX6 SoCs. Bit mapping, data width, and video timings are configurable via device tree. Dual-channel mode is supported for a single high-resolution source. Signed-off-by: Sascha Hauer Signed-off-by: Philipp Zabel --- Changes since v1: - Added device-tree bindings documentation - Removed remains of GPIO handling --- .../devicetree/bindings/staging/imx-drm/ldb.txt | 99 ++++ drivers/staging/imx-drm/Kconfig | 7 + drivers/staging/imx-drm/Makefile | 1 + drivers/staging/imx-drm/imx-ldb.c | 611 +++++++++++++++++++++ 4 files changed, 718 insertions(+) create mode 100644 Documentation/devicetree/bindings/staging/imx-drm/ldb.txt create mode 100644 drivers/staging/imx-drm/imx-ldb.c diff --git a/Documentation/devicetree/bindings/staging/imx-drm/ldb.txt b/Documentation/devicetree/bindings/staging/imx-drm/ldb.txt new file mode 100644 index 0000000..ed93778 --- /dev/null +++ b/Documentation/devicetree/bindings/staging/imx-drm/ldb.txt @@ -0,0 +1,99 @@ +Device-Tree bindings for LVDS Display Bridge (ldb) + +LVDS Display Bridge +=================== + +The LVDS Display Bridge device tree node contains up to two lvds-channel +nodes describing each of the two LVDS encoder channels of the bridge. + +Required properties: + - #address-cells : should be <1> + - #size-cells : should be <0> + - compatible : should be "fsl,imx53-ldb" or "fsl,imx6q-ldb". + Both LDB versions are similar, but i.MX6 has an additional + multiplexer in the front to select any of the four IPU display + interfaces as input for each LVDS channel. + - gpr : should be <&gpr> on i.MX53 and i.MX6q. + The phandle points to the iomuxc-gpr region containing the LVDS + control register. +- clocks, clock-names : phandles to the LDB divider and selector clocks and to + the display interface selector clocks, as described in + Documentation/devicetree/bindings/clock/clock-bindings.txt + The following clocks are expected on i.MX53: + "di0_pll" - LDB LVDS channel 0 mux + "di1_pll" - LDB LVDS channel 1 mux + "di0" - LDB LVDS channel 0 gate + "di1" - LDB LVDS channel 1 gate + "di0_sel" - IPU1 DI0 mux + "di1_sel" - IPU1 DI1 mux + On i.MX6q the following additional clocks are needed: + "di2_sel" - IPU2 DI0 mux + "di3_sel" - IPU2 DI1 mux + The needed clock numbers for each are documented in + Documentation/devicetree/bindings/clock/imx5-clock.txt, and in + Documentation/devicetree/bindings/clock/imx6q-clock.txt. + +Optional properties: + - pinctrl-names : should be "default" on i.MX53, not used on i.MX6q + - pinctrl-0 : a phandle pointing to LVDS pin settings on i.MX53, + not used on i.MX6q + - fsl,dual-channel : boolean. if it exists, only LVDS channel 0 should + be configured - one input will be distributed on both outputs in dual + channel mode + +LVDS Channel +============ + +Each LVDS Channel has to contain a display-timings node that describes the +video timings for the connected LVDS display. For detailed information, also +have a look at Documentation/devicetree/bindings/video/display-timing.txt. + +Required properties: + - reg : should be <0> or <1> + - crtcs : a list of phandles with index pointing to the IPU display interfaces + that can be used as video source for this channel. + - fsl,data-mapping : should be "spwg" or "jeida" + This describes how the color bits are laid out in the + serialized LVDS signal. + - fsl,data-width : should be <18> or <24> + +example: + +gpr: iomuxc-gpr@53fa8000 { + /* ... */ +}; + +ldb: ldb@53fa8008 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "fsl,imx53-ldb"; + gpr = <&gpr>; + clocks = <&clks 122>, <&clks 120>, + <&clks 115>, <&clks 116>, + <&clks 123>, <&clks 85>; + clock-names = "di0_pll", "di1_pll", + "di0_sel", "di1_sel", + "di0", "di1"; + + lvds-channel@0 { + reg = <0>; + crtcs = <&ipu 0>; + fsl,data-mapping = "spwg"; + fsl,data-width = <24>; + + display-timings { + /* ... */ + }; + }; + + lvds-channel@1 { + reg = <1>; + crtcs = <&ipu 1>; + fsl,data-mapping = "spwg"; + fsl,data-width = <24>; + + display-timings { + /* ... */ + }; + }; +}; diff --git a/drivers/staging/imx-drm/Kconfig b/drivers/staging/imx-drm/Kconfig index be7e2e3..3ec352c 100644 --- a/drivers/staging/imx-drm/Kconfig +++ b/drivers/staging/imx-drm/Kconfig @@ -20,6 +20,13 @@ config DRM_IMX_PARALLEL_DISPLAY tristate "Support for parallel displays" depends on DRM_IMX +config DRM_IMX_LDB + tristate "Support for LVDS displays" + help + Choose this to enable the internal LVDS Display Bridge (LDB) + found on i.MX53 and i.MX6 processors. + depends on DRM_IMX + config DRM_IMX_IPUV3_CORE tristate "IPUv3 core support" depends on DRM_IMX diff --git a/drivers/staging/imx-drm/Makefile b/drivers/staging/imx-drm/Makefile index 83a9056..9bfac13 100644 --- a/drivers/staging/imx-drm/Makefile +++ b/drivers/staging/imx-drm/Makefile @@ -4,6 +4,7 @@ imxdrm-objs := imx-drm-core.o imx-fb.o obj-$(CONFIG_DRM_IMX) += imxdrm.o obj-$(CONFIG_DRM_IMX_PARALLEL_DISPLAY) += parallel-display.o +obj-$(CONFIG_DRM_IMX_LDB) += imx-ldb.o obj-$(CONFIG_DRM_IMX_FB_HELPER) += imx-fbdev.o obj-$(CONFIG_DRM_IMX_IPUV3_CORE) += ipu-v3/ obj-$(CONFIG_DRM_IMX_IPUV3) += ipuv3-crtc.o diff --git a/drivers/staging/imx-drm/imx-ldb.c b/drivers/staging/imx-drm/imx-ldb.c new file mode 100644 index 0000000..226f48f --- /dev/null +++ b/drivers/staging/imx-drm/imx-ldb.c @@ -0,0 +1,611 @@ +/* + * i.MX drm driver - LVDS display bridge + * + * Copyright (C) 2012 Sascha Hauer, Pengutronix + * + * 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. + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include