linux-kernel - [PATCH 2/2] drm/msm: Quiet error during failure in optional resource mappings.

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Message-Id: <20200629181921.3019271-2-eric@anholt.net>
Date:   Mon, 29 Jun 2020 11:19:21 -0700
From:   Eric Anholt <eric@...olt.net>
To:     dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org, Rob Clark <robdclark@...il.com>,
        Sean Paul <sean@...rly.run>,
        Jordan Crouse <jcrouse@...eaurora.org>
Cc:     linux-kernel@...r.kernel.org, Eric Anholt <eric@...olt.net>
Subject: [PATCH 2/2] drm/msm: Quiet error during failure in optional resource mappings.

We don't expect to find vbif_nrt or regdma on cheza, but were clogging
up dmesg with errors about it.

Signed-off-by: Eric Anholt <eric@...olt.net>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c |  4 ++--
 drivers/gpu/drm/msm/msm_drv.c           | 22 ++++++++++++++++++----
 drivers/gpu/drm/msm/msm_drv.h           |  2 ++
 3 files changed, 22 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index a4ab802fee6d..d9aef2b5e930 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -838,13 +838,13 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 		dpu_kms->vbif[VBIF_RT] = NULL;
 		goto error;
 	}
-	dpu_kms->vbif[VBIF_NRT] = msm_ioremap(dpu_kms->pdev, "vbif_nrt", "vbif_nrt");
+	dpu_kms->vbif[VBIF_NRT] = msm_ioremap_quiet(dpu_kms->pdev, "vbif_nrt", "vbif_nrt");
 	if (IS_ERR(dpu_kms->vbif[VBIF_NRT])) {
 		dpu_kms->vbif[VBIF_NRT] = NULL;
 		DPU_DEBUG("VBIF NRT is not defined");
 	}
 
-	dpu_kms->reg_dma = msm_ioremap(dpu_kms->pdev, "regdma", "regdma");
+	dpu_kms->reg_dma = msm_ioremap_quiet(dpu_kms->pdev, "regdma", "regdma");
 	if (IS_ERR(dpu_kms->reg_dma)) {
 		dpu_kms->reg_dma = NULL;
 		DPU_DEBUG("REG_DMA is not defined");
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index f6ce40bf3699..df4a3c6a49cd 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -120,8 +120,8 @@ struct clk *msm_clk_get(struct platform_device *pdev, const char *name)
 	return clk;
 }
 
-void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
-		const char *dbgname)
+void __iomem *_msm_ioremap(struct platform_device *pdev, const char *name,
+			   const char *dbgname, bool quiet)
 {
 	struct resource *res;
 	unsigned long size;
@@ -133,7 +133,8 @@ void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
 		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
 	if (!res) {
-		DRM_DEV_ERROR(&pdev->dev, "failed to get memory resource: %s\n", name);
+		if (!quiet)
+			DRM_DEV_ERROR(&pdev->dev, "failed to get memory resource: %s\n", name);
 		return ERR_PTR(-EINVAL);
 	}
 
@@ -141,7 +142,8 @@ void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
 
 	ptr = devm_ioremap(&pdev->dev, res->start, size);
 	if (!ptr) {
-		DRM_DEV_ERROR(&pdev->dev, "failed to ioremap: %s\n", name);
+		if (!quiet)
+			DRM_DEV_ERROR(&pdev->dev, "failed to ioremap: %s\n", name);
 		return ERR_PTR(-ENOMEM);
 	}
 
@@ -151,6 +153,18 @@ void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
 	return ptr;
 }
 
+void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
+			  const char *dbgname)
+{
+	return _msm_ioremap(pdev, name, dbgname, false);
+}
+
+void __iomem *msm_ioremap_quiet(struct platform_device *pdev, const char *name,
+				const char *dbgname)
+{
+	return _msm_ioremap(pdev, name, dbgname, true);
+}
+
 void msm_writel(u32 data, void __iomem *addr)
 {
 	if (reglog)
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index e2d6a6056418..2687f7a42c15 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -411,6 +411,8 @@ struct clk *msm_clk_bulk_get_clock(struct clk_bulk_data *bulk, int count,
 	const char *name);
 void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
 		const char *dbgname);
+void __iomem *msm_ioremap_quiet(struct platform_device *pdev, const char *name,
+		const char *dbgname);
 void msm_writel(u32 data, void __iomem *addr);
 u32 msm_readl(const void __iomem *addr);
 
-- 
2.26.2