From patchwork Wed May 8 17:34:22 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacopo Mondi X-Patchwork-Id: 10936293 X-Patchwork-Delegate: kieran@bingham.xyz Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 56F7014DB for ; Wed, 8 May 2019 17:33:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 429A32862D for ; Wed, 8 May 2019 17:33:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 36CB528610; Wed, 8 May 2019 17:33:55 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, 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 797CB2862D for ; Wed, 8 May 2019 17:33:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728982AbfEHRdu (ORCPT ); Wed, 8 May 2019 13:33:50 -0400 Received: from relay8-d.mail.gandi.net ([217.70.183.201]:58361 "EHLO relay8-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728655AbfEHRdt (ORCPT ); Wed, 8 May 2019 13:33:49 -0400 X-Originating-IP: 93.56.79.2 Received: from uno.localdomain (unknown [93.56.79.2]) (Authenticated sender: jacopo@jmondi.org) by relay8-d.mail.gandi.net (Postfix) with ESMTPSA id E09FA1BF203; Wed, 8 May 2019 17:33:46 +0000 (UTC) From: Jacopo Mondi To: laurent.pinchart@ideasonboard.com, linux-renesas-soc@vger.kernel.org Cc: Jacopo Mondi , VenkataRajesh.Kalakodima@in.bosch.com, Harsha.ManjulaMallikarjun@in.bosch.com, Jacopo Mondi Subject: [RFC 3/9] [TODO] drm: rcar-du: Add basic support for CMM Date: Wed, 8 May 2019 19:34:22 +0200 Message-Id: <20190508173428.22054-4-jacopo+renesas@jmondi.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190508173428.22054-1-jacopo+renesas@jmondi.org> References: <20190508173428.22054-1-jacopo+renesas@jmondi.org> MIME-Version: 1.0 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 Add a driver skeleton for the R-Car Display Unit Color Correction Module. Each DU output channel is provided with a CMM unit to perform image enhancement and color correction. Add support for CMM through a skeleton driver to be later expanded to support setting color correction tables through the DRM/KMS properties framework. As of now, the driver is only useful to demonstrate the integration with the DU driver. Not-Yet-Signed-off-by: Jacopo Mondi --- drivers/gpu/drm/rcar-du/Kconfig | 7 +++ drivers/gpu/drm/rcar-du/Makefile | 1 + drivers/gpu/drm/rcar-du/rcar_du_cmm.c | 78 +++++++++++++++++++++++++++ drivers/gpu/drm/rcar-du/rcar_du_cmm.h | 23 ++++++++ 4 files changed, 109 insertions(+) create mode 100644 drivers/gpu/drm/rcar-du/rcar_du_cmm.c create mode 100644 drivers/gpu/drm/rcar-du/rcar_du_cmm.h diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig index 1529849e217e..820f2b85a073 100644 --- a/drivers/gpu/drm/rcar-du/Kconfig +++ b/drivers/gpu/drm/rcar-du/Kconfig @@ -13,6 +13,13 @@ config DRM_RCAR_DU Choose this option if you have an R-Car chipset. If M is selected the module will be called rcar-du-drm. +config DRM_RCAR_CMM + bool "R-Car DU Color Correction Module Support" + depends on DRM && OF + depends on DRM_RCAR_DU && ARCH_RCAR_GEN3 + help + Enable support for R-Car Gen3 Color Correction Module (CMM). + config DRM_RCAR_DW_HDMI tristate "R-Car DU Gen3 HDMI Encoder Support" depends on DRM && OF diff --git a/drivers/gpu/drm/rcar-du/Makefile b/drivers/gpu/drm/rcar-du/Makefile index 6c2ed9c46467..ae26d465d421 100644 --- a/drivers/gpu/drm/rcar-du/Makefile +++ b/drivers/gpu/drm/rcar-du/Makefile @@ -15,6 +15,7 @@ rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS) += rcar_du_of.o \ rcar-du-drm-$(CONFIG_DRM_RCAR_VSP) += rcar_du_vsp.o rcar-du-drm-$(CONFIG_DRM_RCAR_WRITEBACK) += rcar_du_writeback.o +obj-$(CONFIG_DRM_RCAR_CMM) += rcar_du_cmm.o obj-$(CONFIG_DRM_RCAR_DU) += rcar-du-drm.o obj-$(CONFIG_DRM_RCAR_DW_HDMI) += rcar_dw_hdmi.o obj-$(CONFIG_DRM_RCAR_LVDS) += rcar_lvds.o diff --git a/drivers/gpu/drm/rcar-du/rcar_du_cmm.c b/drivers/gpu/drm/rcar-du/rcar_du_cmm.c new file mode 100644 index 000000000000..63f545830bb9 --- /dev/null +++ b/drivers/gpu/drm/rcar-du/rcar_du_cmm.c @@ -0,0 +1,78 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * rcar_du_cmm.c -- R-Car Display Unit Color Management Module + * + * Copyright (C) 2019 Jacopo Mondi + */ + +#include +#include +#include +#include +#include + +#include "rcar_du_cmm.h" +#include "rcar_du_crtc.h" + +struct rcar_cmm { + struct clk *clk; + void __iomem *base; +}; + +int rcar_du_cmm_setup(struct platform_device *pdev, struct rcar_du_crtc *rcrtc) +{ + struct rcar_cmm *rcmm = platform_get_drvdata(pdev); + int ret; + + ret = clk_prepare_enable(rcmm->clk); + if (ret) + return ret; + + return 0; +} + +static int rcar_cmm_probe(struct platform_device *pdev) +{ + struct rcar_cmm *rcmm; + struct resource *res; + + rcmm = devm_kzalloc(&pdev->dev, sizeof(*rcmm), GFP_KERNEL); + if (!rcmm) + return -ENOMEM; + + platform_set_drvdata(pdev, rcmm); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + rcmm->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(rcmm->base)) + return PTR_ERR(rcmm->base); + + rcmm->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(rcmm->clk)) { + dev_err(&pdev->dev, "Failed to get CMM clock"); + return PTR_ERR(rcmm->clk); + } + + return 0; +} + +static const struct of_device_id rcar_cmm_of_table[] = { + { .compatible = "renesas,cmm" }, + { }, +}; + +MODULE_DEVICE_TABLE(of, rcar_cmm_of_table); + +static struct platform_driver rcar_cmm_platform_driver = { + .probe = rcar_cmm_probe, + .driver = { + .name = "rcar-cmm", + .of_match_table = rcar_cmm_of_table, + }, +}; + +module_platform_driver(rcar_cmm_platform_driver); + +MODULE_AUTHOR("Jacopo Mondi + */ + +#ifndef __RCAR_DU_CMM_H_ +#define __RCAR_DU_CMM_H_ + +#include +#include + +struct rcar_du_crtc; + +struct rcar_du_cmm { + struct device_node *np; + unsigned int crtc; +}; + +int rcar_du_cmm_setup(struct platform_device *, struct rcar_du_crtc *); + +#endif /* __RCAR_DU_CMM_H_ */