From patchwork Tue Jul 13 20:21:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 12374991 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7923CC11F66 for ; Tue, 13 Jul 2021 20:21:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5A7A461374 for ; Tue, 13 Jul 2021 20:21:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235244AbhGMUYE (ORCPT ); Tue, 13 Jul 2021 16:24:04 -0400 Received: from mga07.intel.com ([134.134.136.100]:12038 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235135AbhGMUYD (ORCPT ); Tue, 13 Jul 2021 16:24:03 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10044"; a="274067564" X-IronPort-AV: E=Sophos;i="5.84,237,1620716400"; d="scan'208";a="274067564" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Jul 2021 13:21:12 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,237,1620716400"; d="scan'208";a="427396588" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga007.fm.intel.com with ESMTP; 13 Jul 2021 13:21:10 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id 05ECFFF; Tue, 13 Jul 2021 23:21:36 +0300 (EEST) From: Andy Shevchenko To: Mauro Carvalho Chehab , Sakari Ailus , Andy Shevchenko , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Yong Zhi , Bingbu Cao , Dan Scally , Tianshu Qiu , Mauro Carvalho Chehab Subject: [PATCH v1 1/6] media: ipu3-cio2: Replace open-coded for_each_set_bit() Date: Tue, 13 Jul 2021 23:21:26 +0300 Message-Id: <20210713202131.13906-1-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Use for_each_set_bit() instead of open-coding it to simplify the code. Signed-off-by: Andy Shevchenko --- drivers/media/pci/intel/ipu3/ipu3-cio2-main.c | 75 +++++++++---------- 1 file changed, 36 insertions(+), 39 deletions(-) diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c b/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c index 9f75c9303416..5fb379e91071 100644 --- a/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c +++ b/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c @@ -11,6 +11,7 @@ * et al. */ +#include #include #include #include @@ -612,6 +613,20 @@ static const char *const cio2_irq_errs[] = { "non-matching Long Packet stalled", }; +static void cio2_irq_log_irq_errs(struct device *dev, u8 port, u32 status) +{ + unsigned long csi2_status = status; + unsigned int i; + + for_each_set_bit(i, &csi2_status, ARRAY_SIZE(cio2_irq_errs)) + dev_err(dev, "CSI-2 receiver port %i: %s\n", + port, cio2_irq_errs[i]); + + if (fls_long(csi2_status) >= ARRAY_SIZE(cio2_irq_errs)) + dev_warn(dev, "unknown CSI2 error 0x%lx on port %i\n", + csi2_status, port); +} + static const char *const cio2_port_errs[] = { "ECC recoverable", "DPHY not recoverable", @@ -622,6 +637,15 @@ static const char *const cio2_port_errs[] = { "PKT2LONG", }; +static void cio2_irq_log_port_errs(struct device *dev, u8 port, u32 status) +{ + unsigned long port_status = status; + unsigned int i; + + for_each_set_bit(i, &port_status, ARRAY_SIZE(cio2_port_errs)) + dev_err(dev, "port %i error %s\n", port, cio2_port_errs[i]); +} + static void cio2_irq_handle_once(struct cio2_device *cio2, u32 int_status) { void __iomem *const base = cio2->base; @@ -687,59 +711,32 @@ static void cio2_irq_handle_once(struct cio2_device *cio2, u32 int_status) if (int_status & (CIO2_INT_IOIE | CIO2_INT_IOIRQ)) { /* CSI2 receiver (error) interrupt */ - u32 ie_status, ie_clear; unsigned int port; + u32 ie_status; - ie_clear = readl(base + CIO2_REG_INT_STS_EXT_IE); - ie_status = ie_clear; + ie_status = readl(base + CIO2_REG_INT_STS_EXT_IE); for (port = 0; port < CIO2_NUM_PORTS; port++) { u32 port_status = (ie_status >> (port * 8)) & 0xff; - u32 err_mask = BIT_MASK(ARRAY_SIZE(cio2_port_errs)) - 1; - void __iomem *const csi_rx_base = - base + CIO2_REG_PIPE_BASE(port); - unsigned int i; - - while (port_status & err_mask) { - i = ffs(port_status) - 1; - dev_err(dev, "port %i error %s\n", - port, cio2_port_errs[i]); - ie_status &= ~BIT(port * 8 + i); - port_status &= ~BIT(i); - } + + cio2_irq_log_port_errs(dev, port, port_status); if (ie_status & CIO2_INT_EXT_IE_IRQ(port)) { - u32 csi2_status, csi2_clear; + void __iomem *csi_rx_base = + base + CIO2_REG_PIPE_BASE(port); + u32 csi2_status; csi2_status = readl(csi_rx_base + CIO2_REG_IRQCTRL_STATUS); - csi2_clear = csi2_status; - err_mask = - BIT_MASK(ARRAY_SIZE(cio2_irq_errs)) - 1; - - while (csi2_status & err_mask) { - i = ffs(csi2_status) - 1; - dev_err(dev, - "CSI-2 receiver port %i: %s\n", - port, cio2_irq_errs[i]); - csi2_status &= ~BIT(i); - } - - writel(csi2_clear, - csi_rx_base + CIO2_REG_IRQCTRL_CLEAR); - if (csi2_status) - dev_warn(dev, - "unknown CSI2 error 0x%x on port %i\n", - csi2_status, port); - ie_status &= ~CIO2_INT_EXT_IE_IRQ(port); + cio2_irq_log_irq_errs(dev, port, csi2_status); + + writel(csi2_status, + csi_rx_base + CIO2_REG_IRQCTRL_CLEAR); } } - writel(ie_clear, base + CIO2_REG_INT_STS_EXT_IE); - if (ie_status) - dev_warn(dev, "unknown interrupt 0x%x on IE\n", - ie_status); + writel(ie_status, base + CIO2_REG_INT_STS_EXT_IE); int_status &= ~(CIO2_INT_IOIE | CIO2_INT_IOIRQ); }