From patchwork Wed Jun 29 10:51:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kieran Bingham X-Patchwork-Id: 12899761 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EA2DACCA480 for ; Wed, 29 Jun 2022 10:51:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232909AbiF2Kvr (ORCPT ); Wed, 29 Jun 2022 06:51:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58744 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232882AbiF2Kvp (ORCPT ); Wed, 29 Jun 2022 06:51:45 -0400 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6E6BB2654D; Wed, 29 Jun 2022 03:51:44 -0700 (PDT) Received: from Monstersaurus.ksquared.org.uk.beta.tailscale.net (cpc89244-aztw30-2-0-cust3082.18-1.cable.virginm.net [86.31.172.11]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 64DDB6F0; Wed, 29 Jun 2022 12:51:40 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1656499900; bh=gbwcAtFhgYh3ZS7hLicXTXvT/aorH0lPG8r5PnlH3jE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=G7BDB8iD26AKOXZqNhzQB2dQv4jReyLkG0hka+cNMfJs3iGbhKQGMdQ7mcGk9uvJd Lwjh12otRFRk6ZuW4gz7ATfZo8FsTL3U4/6wmZI2UidvyOHHybuEJ4ExitxnsQMhiI uSZ2mVrRtKSdM4G6AvPpKBenUi5SXPiW/gvVbM4k= From: Kieran Bingham To: linux-renesas-soc@vger.kernel.org, linux-media@vger.kernel.org, Eugeniu Rosca Cc: Laurent Pinchart , Kieran Bingham Subject: [PATCH 2/7] v4l: vsp1: Provide WPF underflow error detection and reporting Date: Wed, 29 Jun 2022 11:51:30 +0100 Message-Id: <20220629105135.2652773-3-kieran.bingham+renesas@ideasonboard.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220629105135.2652773-1-kieran.bingham+renesas@ideasonboard.com> References: <20220629105135.2652773-1-kieran.bingham+renesas@ideasonboard.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org In erroneous conditions, the WPF can assert an underrun interrupt. This usually represents a mis-configured pipeline, or bus priority issue. It is likely that in the event of this interrupt being asserted the hardware is no longer operational. A device error message at the least is useful in this scenario Signed-off-by: Kieran Bingham --- drivers/media/platform/renesas/vsp1/vsp1_drv.c | 8 +++++++- drivers/media/platform/renesas/vsp1/vsp1_regs.h | 2 ++ drivers/media/platform/renesas/vsp1/vsp1_wpf.c | 2 +- 3 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/renesas/vsp1/vsp1_drv.c b/drivers/media/platform/renesas/vsp1/vsp1_drv.c index 1f73c48eb738..392aced46758 100644 --- a/drivers/media/platform/renesas/vsp1/vsp1_drv.c +++ b/drivers/media/platform/renesas/vsp1/vsp1_drv.c @@ -44,7 +44,8 @@ static irqreturn_t vsp1_irq_handler(int irq, void *data) { - u32 mask = VI6_WPF_IRQ_STA_DFE | VI6_WPF_IRQ_STA_FRE; + u32 mask = VI6_WPF_IRQ_STA_UND | VI6_WPF_IRQ_STA_DFE | + VI6_WPF_IRQ_STA_FRE; struct vsp1_device *vsp1 = data; irqreturn_t ret = IRQ_NONE; unsigned int i; @@ -63,6 +64,11 @@ static irqreturn_t vsp1_irq_handler(int irq, void *data) vsp1_pipeline_frame_end(wpf->entity.pipe); ret = IRQ_HANDLED; } + + if (status & VI6_WPF_IRQ_STA_UND) { + dev_err(vsp1->dev, "WPF[%d] Underflow error\n", i); + ret = IRQ_HANDLED; + } } return ret; diff --git a/drivers/media/platform/renesas/vsp1/vsp1_regs.h b/drivers/media/platform/renesas/vsp1/vsp1_regs.h index fae7286eb01e..632c43bb4cbd 100644 --- a/drivers/media/platform/renesas/vsp1/vsp1_regs.h +++ b/drivers/media/platform/renesas/vsp1/vsp1_regs.h @@ -32,10 +32,12 @@ #define VI6_STATUS_SYS_ACT(n) BIT((n) + 8) #define VI6_WPF_IRQ_ENB(n) (0x0048 + (n) * 12) +#define VI6_WPF_IRQ_ENB_UNDE BIT(16) #define VI6_WPF_IRQ_ENB_DFEE BIT(1) #define VI6_WPF_IRQ_ENB_FREE BIT(0) #define VI6_WPF_IRQ_STA(n) (0x004c + (n) * 12) +#define VI6_WPF_IRQ_STA_UND BIT(16) #define VI6_WPF_IRQ_STA_DFE BIT(1) #define VI6_WPF_IRQ_STA_FRE BIT(0) diff --git a/drivers/media/platform/renesas/vsp1/vsp1_wpf.c b/drivers/media/platform/renesas/vsp1/vsp1_wpf.c index 94e91d7bb56c..28f01f98fd6b 100644 --- a/drivers/media/platform/renesas/vsp1/vsp1_wpf.c +++ b/drivers/media/platform/renesas/vsp1/vsp1_wpf.c @@ -342,7 +342,7 @@ static void wpf_configure_stream(struct vsp1_entity *entity, /* Enable interrupts. */ vsp1_dl_body_write(dlb, VI6_WPF_IRQ_STA(index), 0); vsp1_dl_body_write(dlb, VI6_WPF_IRQ_ENB(index), - VI6_WPF_IRQ_ENB_DFEE); + VI6_WPF_IRQ_ENB_DFEE | VI6_WPF_IRQ_ENB_UNDE); /* * Configure writeback for display pipelines (the wpf writeback flag is