From patchwork Mon Mar 25 14:14:40 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Guido_G=C3=BCnther?= X-Patchwork-Id: 10869297 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 4FD1617E6 for ; Mon, 25 Mar 2019 14:15:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3CD1328CAC for ; Mon, 25 Mar 2019 14:15:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3141B28EAB; Mon, 25 Mar 2019 14:15:06 +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=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 5572928CAC for ; Mon, 25 Mar 2019 14:14:58 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3E9866E570; Mon, 25 Mar 2019 14:14:56 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from honk.sigxcpu.org (honk.sigxcpu.org [24.134.29.49]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3A7716E32B for ; Mon, 25 Mar 2019 14:14:51 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by honk.sigxcpu.org (Postfix) with ESMTP id EC398FB04; Mon, 25 Mar 2019 15:14:49 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at honk.sigxcpu.org Received: from honk.sigxcpu.org ([127.0.0.1]) by localhost (honk.sigxcpu.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id kNvEXCclaEH0; Mon, 25 Mar 2019 15:14:44 +0100 (CET) Received: by bogon.sigxcpu.org (Postfix, from userid 1000) id C7B1C4027E; Mon, 25 Mar 2019 15:14:43 +0100 (CET) From: =?utf-8?q?Guido_G=C3=BCnther?= To: Maxime Ripard , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, Robert Chiras , Sam Ravnborg , Fabio Estevam , linux-kernel@vger.kernel.org Subject: [PATCH v7 0/3] Mixel DPHY support for i.MX8 Date: Mon, 25 Mar 2019 15:14:40 +0100 Message-Id: X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP tl;dr: v7 fixes a build issued due to the lack of a HAS_IOMEM This adds initial support for the Mixel IP based mipi dphy as found on i.MX8 processors. It has support for the i.MX8MQ, support for other variants can be added - once the platform specific parts are in - via the provided devdata. The driver is somewhat based on what's found in NXPs BSP. Public documentation on the DPHY's registers is currently thin in the i.MX8 reference manuals (even on the i.MX8QXP form 11/18) so most of the values were taken from existing drivers. Newer NXP drivers have a bit more details so where possible the timings are calculated and validated. I've also sent out an initial version of a NWL mipi dsi host controller driver using this: https://lists.freedesktop.org/archives/dri-devel/2019-March/209685.html Robert Chiras (the author of the corresponding driver in NXPs vendor tree) got this driver to work in his tree as well: https://www.spinics.net/lists/arm-kernel/msg711950.html Chages from v6 * Depend on HAS_IOMEM (fixes a build problem on UM spotted by kbuild) Chages from v5 * Fix build problems on mips (spotted by the kbuild test robot) by using u32 consistently and long long for lp_t. Changes from v4 * Build by default on ARCH_MXC && ARM64 Changes form v3 * Check correct variable after devm_ioremap_resource * Add Robert Chiras as Co-authored-by since he's the author of the driver in NXPs BSP. Changes from v2 * As per review comments from Fabio Estevam * KConfig: select REGMAP_MMIO * Drop phy_read * Don't make phy_write inline * Remove duplicate debugging output * Comment style and typo fixes * Add #defines's for PLL lock timing values * Return correct error value when PLL fails to lock * Check error when enabling clock * Use devm_ioremap_resource * As per review comments from Robert Chiras * Deassert PD_DPHY after PLL lock (as per mixel ref manual) * Assert PD_{DPHY,PLL} before power on (as per mixel ref manual)manual * Add exit phy_op to reset CN/CM/CO Changes from v1 * As per review comments from Fabio Estevam * Kconfig: tristate mixel dphy support. * Drop unused 'ret' in mixel_dphy_ref_power_off. * Match values of DPHY_RXL{PRP,DRP} to those of https://source.codeaurora.org/external/imx/linux-imx/log/?h=imx_4.14.78_1.0.0_ga The previous values were based on 4.9. * Use resource size on devm_ioremap, we have that in dt already. * Use regmap so it's simple to dump the registers. * Use regmap_read_poll_timeout instead of open coded loop. * Add undocumented rxhs_settle register * As per review comments from Sam Ravnborg * Move driver to d/phy/freescale/ * Move SPDX-License-Identifier to top of file. * Drop '/* #define DEBUG 1 */'. * Use GPL-2.0+ since the vendor driver uses that as well. * Drop the mutex, register access is now protected by regmap. * Fix various style / indentation issues. * Check for register read, write and ioremap errors * Improve phy timing calculations * Use LP clock rate where sensible, check for errors * Use ad hoc forumulas for timings involving hs clock * Switch from dphy_ops to devdata. Other i.MX8 variants differ in register layout too * Add Mixel Inc to vendor-prefixes.txt Guido Günther (3): dt-bindings: Add vendor prefix for Mixel Inc dt-bindings: phy: Add documentation for mixel dphy phy: Add driver for mixel dphy found on imx8 .../bindings/phy/mixel,mipi-dsi-phy.txt | 29 + .../devicetree/bindings/vendor-prefixes.txt | 1 + drivers/phy/freescale/Kconfig | 11 + drivers/phy/freescale/Makefile | 1 + .../phy/freescale/phy-fsl-imx8-mipi-dphy.c | 506 ++++++++++++++++++ 5 files changed, 548 insertions(+) create mode 100644 Documentation/devicetree/bindings/phy/mixel,mipi-dsi-phy.txt create mode 100644 drivers/phy/freescale/phy-fsl-imx8-mipi-dphy.c