From patchwork Wed Jan 15 01:23:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Kasireddy, Vivek" X-Patchwork-Id: 11333073 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 53F4F14B4 for ; Wed, 15 Jan 2020 01:27:57 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 3BD9524658 for ; Wed, 15 Jan 2020 01:27:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3BD9524658 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E50686E802; Wed, 15 Jan 2020 01:27:54 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 443A16E802 for ; Wed, 15 Jan 2020 01:27:54 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 14 Jan 2020 17:27:53 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,320,1574150400"; d="scan'208";a="372765818" Received: from orsmsx109.amr.corp.intel.com ([10.22.240.7]) by orsmga004.jf.intel.com with ESMTP; 14 Jan 2020 17:27:53 -0800 Received: from orsmsx112.amr.corp.intel.com (10.22.240.13) by ORSMSX109.amr.corp.intel.com (10.22.240.7) with Microsoft SMTP Server (TLS) id 14.3.439.0; Tue, 14 Jan 2020 17:27:53 -0800 Received: from vkasired-desk2.fm.intel.com (10.22.254.138) by ORSMSX112.amr.corp.intel.com (10.22.240.13) with Microsoft SMTP Server (TLS) id 14.3.439.0; Tue, 14 Jan 2020 17:27:52 -0800 From: Vivek Kasireddy To: Date: Tue, 14 Jan 2020 17:23:05 -0800 Message-ID: <20200115012305.27395-1-vivek.kasireddy@intel.com> X-Mailer: git-send-email 2.21.1 MIME-Version: 1.0 X-Originating-IP: [10.22.254.138] Subject: [Intel-gfx] [PATCH] drm/i915/dsi: Lookup the i2c bus from ACPI NS only if CONFIG_ACPI=y (v2) X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Hulk Robot , Jani Nikula , Zhang Xiaoxu Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Perform the i2c bus/adapter lookup from ACPI Namespace only if ACPI is enabled in the kernel config. If ACPI is not enabled or if the lookup fails, we'll fallback to using the VBT for identiying the i2c bus. This patch Fixes: 8cbf89db2941 ("drm/i915/dsi: Parse the I2C element from the VBT MIPI sequence block (v3)") v2: Reformat the above line to clearly identify the commit this patch is fixing for CI (Jani) Cc: Hans de Goede Cc: Nabendu Maiti Cc: Matt Roper Cc: Bob Paauwe Cc: Ville Syrjälä Cc: Jani Nikula Cc: Zhang Xiaoxu Reported-by: Hulk Robot Signed-off-by: Vivek Kasireddy --- drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 47 +++++++++++++------- 1 file changed, 31 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c index 89fb0d90b694..6ec35d975bd7 100644 --- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c +++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c @@ -384,6 +384,7 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data) return data; } +#ifdef CONFIG_ACPI static int i2c_adapter_lookup(struct acpi_resource *ares, void *data) { struct i2c_adapter_lookup *lookup = data; @@ -413,14 +414,41 @@ static int i2c_adapter_lookup(struct acpi_resource *ares, void *data) return 1; } -static const u8 *mipi_exec_i2c(struct intel_dsi *intel_dsi, const u8 *data) +static void i2c_acpi_find_adapter(struct intel_dsi *intel_dsi, + const u16 slave_addr) { struct drm_device *drm_dev = intel_dsi->base.base.dev; struct device *dev = &drm_dev->pdev->dev; - struct i2c_adapter *adapter; struct acpi_device *acpi_dev; struct list_head resource_list; struct i2c_adapter_lookup lookup; + + acpi_dev = ACPI_COMPANION(dev); + if (acpi_dev) { + memset(&lookup, 0, sizeof(lookup)); + lookup.slave_addr = slave_addr; + lookup.intel_dsi = intel_dsi; + lookup.dev_handle = acpi_device_handle(acpi_dev); + + INIT_LIST_HEAD(&resource_list); + acpi_dev_get_resources(acpi_dev, &resource_list, + i2c_adapter_lookup, + &lookup); + acpi_dev_free_resource_list(&resource_list); + } +} +#else +static inline void i2c_acpi_find_adapter(struct intel_dsi *intel_dsi, + const u16 slave_addr) +{ +} +#endif + +static const u8 *mipi_exec_i2c(struct intel_dsi *intel_dsi, const u8 *data) +{ + struct drm_device *drm_dev = intel_dsi->base.base.dev; + struct device *dev = &drm_dev->pdev->dev; + struct i2c_adapter *adapter; struct i2c_msg msg; int ret; u8 vbt_i2c_bus_num = *(data + 2); @@ -431,20 +459,7 @@ static const u8 *mipi_exec_i2c(struct intel_dsi *intel_dsi, const u8 *data) if (intel_dsi->i2c_bus_num < 0) { intel_dsi->i2c_bus_num = vbt_i2c_bus_num; - - acpi_dev = ACPI_COMPANION(dev); - if (acpi_dev) { - memset(&lookup, 0, sizeof(lookup)); - lookup.slave_addr = slave_addr; - lookup.intel_dsi = intel_dsi; - lookup.dev_handle = acpi_device_handle(acpi_dev); - - INIT_LIST_HEAD(&resource_list); - acpi_dev_get_resources(acpi_dev, &resource_list, - i2c_adapter_lookup, - &lookup); - acpi_dev_free_resource_list(&resource_list); - } + i2c_acpi_find_adapter(intel_dsi, slave_addr); } adapter = i2c_get_adapter(intel_dsi->i2c_bus_num);