From patchwork Sun Jan 30 19:37:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sui Jingfeng <15330273260@189.cn> X-Patchwork-Id: 12730021 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 27A98C433F5 for ; Sun, 30 Jan 2022 19:37:35 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1E21E113707; Sun, 30 Jan 2022 19:37:34 +0000 (UTC) Received: from 189.cn (ptr.189.cn [183.61.185.104]) by gabe.freedesktop.org (Postfix) with ESMTP id ADD19113709 for ; Sun, 30 Jan 2022 19:37:32 +0000 (UTC) HMM_SOURCE_IP: 10.64.8.43:33340.1172243748 HMM_ATTACHE_NUM: 0000 HMM_SOURCE_TYPE: SMTP Received: from clientip-114.242.206.180 (unknown [10.64.8.43]) by 189.cn (HERMES) with SMTP id 1767A1001DC; Mon, 31 Jan 2022 03:37:27 +0800 (CST) Received: from ([172.27.8.53]) by gateway-151646-dep-b7fbf7d79-vjdjk with ESMTP id 036610d50f3c4c03a09489c6a03ad3a0 for l.stach@pengutronix.de; Mon, 31 Jan 2022 03:37:30 CST X-Transaction-ID: 036610d50f3c4c03a09489c6a03ad3a0 X-Real-From: 15330273260@189.cn X-Receive-IP: 172.27.8.53 X-MEDUSA-Status: 0 From: Sui Jingfeng <15330273260@189.cn> To: Lucas Stach , Maarten Lankhorst , Maxime Ripard , Roland Scheidegger , Zack Rusin , Christian Gmeiner , David Airlie , Daniel Vetter , Rob Herring , Thomas Bogendoerfer , Krzysztof Kozlowski , Andrey Zhizhikin , Sam Ravnborg , suijingfeng Subject: [PATCH v3 0/1] drm/lsdc: add drm driver for loongson display controller Date: Mon, 31 Jan 2022 03:37:22 +0800 Message-Id: <20220130193723.2923-1-15330273260@189.cn> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kernel test robot , Randy Dunlap , linux-mips@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" v3: fix more grammar mistakes in Kconfig reported by Randy Dunlap and give more details about lsdc. v2: fixup warnings reported by kernel test robot There is a display controller in loongson's LS2K1000 SoC and LS7A1000 bridge, and the DC in those chip is a PCI device. This display controller have two display pipes but with only one hardware cursor. Each way has a DVO output interface and the CRTC is able to scanout from 1920x1080 resolution at 60Hz. +----------+ +-----------------------+------------+ | LS3A4000 |<-------->| LS7A1000 | DDR3 | +------+ | CPU | HT Bus | +--------+ +-------+ | 1333 |<->| VRAM | | LS3A5000 |<-------->| | GC1000 | | LSDC | | controller | +------+ +----------+ | +--------+ +-+---+-+ +------------| +---------------|---|----------------+ | | +-------+ DVO0 | | DVO1 +------+ |ADV7125|-----------+ +------->|TFP410|--> DVI/HDMI +-------+ +------+ The above picture give a simple usage, the encoder is not necessary adv7125 or tfp410, it is a choice of the downstream board manufacturer. Other candicate encoder can be ch7034b, sil9022 and ite66121 etc this is the reason why we still need device to provide board specific information. The downstream kernel use self made vbios instead of device tree which is hard to upstream. The display controller is uncommon outside of china, it don't have rich document either. Nevertheless, this patch try to provided a minimal support for this display controller which is for graphic environment bring up. Hope that the code can speak for itself. For ls7a1000, there are 4 gpios who register is located at dc register space which is used to emulation i2c. LS2K1000 and LS2K0500 SoC don't have those hardware, they use general purpose gpio or hardware i2c to serve this purpose. For ladc, there is only a 1:1 mapping of encoders and connectors. +-------------------+ _________ | | | | | CRTC0 --> DVO0 ---------> Encoder0 --> Connector0 ---> | Monotor | | | ^ ^ |_________| | | | | | <----- i2c0 ----------------+ | LSDC IP CORE | | <----- i2c1 ----------------+ | | | | _________ | | | | | | | CRTC1 --> DVO1 ---------> Encoder1 --> Connector1 ---> | Panel | | | |_________| +-------------------+ Below is a brief introduction of loongson's CPU, bridge chip and SoC. LS2K1000 is a double core 1.0Ghz mips64r2 compatible SoC[1]. LS7A1000 is a bridge chip made by Loongson corporation which act as north and/or south bridge of loongson's desktop and server level processor. It is equivalent to RS780E or something like that. More details can be read from its user manual[2]. This bridge chip is typically use with LS3A3000, LS3A4000 and LS3A5000 cpu. LS3A3000 is 4 core 1.45gHz mips64r2 compatible cpu. LS3A4000 is 4 core 1.8gHz mips64r5 compatible cpu. LS3A5000 is 4 core 2.5gHz loongarch cpu[3]. [1] https://wiki.debian.org/InstallingDebianOn/Lemote/Loongson2K1000 [2] https://loongson.github.io/LoongArch-Documentation/Loongson-7A1000-usermanual-EN.html [3] https://loongson.github.io/LoongArch-Documentation/Loongson-3A5000-usermanual-EN.html Reported-by: Randy Dunlap Reported-by: kernel test robot Signed-off-by: suijingfeng Signed-off-by: Sui Jingfeng <15330273260@189.cn> suijingfeng (1): drm/lsdc: add drm driver for loongson display controller drivers/gpu/drm/Kconfig | 2 + drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/lsdc/Kconfig | 38 ++ drivers/gpu/drm/lsdc/Makefile | 15 + drivers/gpu/drm/lsdc/lsdc_connector.c | 439 ++++++++++++++ drivers/gpu/drm/lsdc/lsdc_connector.h | 60 ++ drivers/gpu/drm/lsdc/lsdc_crtc.c | 438 ++++++++++++++ drivers/gpu/drm/lsdc/lsdc_drv.c | 824 ++++++++++++++++++++++++++ drivers/gpu/drm/lsdc/lsdc_drv.h | 214 +++++++ drivers/gpu/drm/lsdc/lsdc_encoder.c | 79 +++ drivers/gpu/drm/lsdc/lsdc_i2c.c | 220 +++++++ drivers/gpu/drm/lsdc/lsdc_i2c.h | 61 ++ drivers/gpu/drm/lsdc/lsdc_irq.c | 77 +++ drivers/gpu/drm/lsdc/lsdc_irq.h | 37 ++ drivers/gpu/drm/lsdc/lsdc_plane.c | 688 +++++++++++++++++++++ drivers/gpu/drm/lsdc/lsdc_pll.c | 605 +++++++++++++++++++ drivers/gpu/drm/lsdc/lsdc_pll.h | 109 ++++ drivers/gpu/drm/lsdc/lsdc_regs.h | 242 ++++++++ 18 files changed, 4149 insertions(+) create mode 100644 drivers/gpu/drm/lsdc/Kconfig create mode 100644 drivers/gpu/drm/lsdc/Makefile create mode 100644 drivers/gpu/drm/lsdc/lsdc_connector.c create mode 100644 drivers/gpu/drm/lsdc/lsdc_connector.h create mode 100644 drivers/gpu/drm/lsdc/lsdc_crtc.c create mode 100644 drivers/gpu/drm/lsdc/lsdc_drv.c create mode 100644 drivers/gpu/drm/lsdc/lsdc_drv.h create mode 100644 drivers/gpu/drm/lsdc/lsdc_encoder.c create mode 100644 drivers/gpu/drm/lsdc/lsdc_i2c.c create mode 100644 drivers/gpu/drm/lsdc/lsdc_i2c.h create mode 100644 drivers/gpu/drm/lsdc/lsdc_irq.c create mode 100644 drivers/gpu/drm/lsdc/lsdc_irq.h create mode 100644 drivers/gpu/drm/lsdc/lsdc_plane.c create mode 100644 drivers/gpu/drm/lsdc/lsdc_pll.c create mode 100644 drivers/gpu/drm/lsdc/lsdc_pll.h create mode 100644 drivers/gpu/drm/lsdc/lsdc_regs.h