From 73bb394cb969ba11d612cc0bc05b375bd599a28c Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Wed, 26 Aug 2020 16:55:12 +0200 Subject: [PATCH 1/3] drm/exynos: dsi: Simplify with dev_err_probe() Common pattern of handling deferred probe can be simplified with dev_err_probe(). Less code and also it prints the error value. Signed-off-by: Krzysztof Kozlowski Reviewed-by: Andrzej Hajda Signed-off-by: Inki Dae --- drivers/gpu/drm/exynos/exynos_drm_dsi.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c index 1a1a2853a842..5b9666fc7af1 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c @@ -1760,11 +1760,8 @@ static int exynos_dsi_probe(struct platform_device *pdev) dsi->supplies[1].supply = "vddio"; ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(dsi->supplies), dsi->supplies); - if (ret) { - if (ret != -EPROBE_DEFER) - dev_info(dev, "failed to get regulators: %d\n", ret); - return ret; - } + if (ret) + return dev_err_probe(dev, ret, "failed to get regulators\n"); dsi->clks = devm_kcalloc(dev, dsi->driver_data->num_clks, sizeof(*dsi->clks), From 231a474dd2b1fbd47671ca1f56fa221d9b0e72cb Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Wed, 26 Aug 2020 16:55:13 +0200 Subject: [PATCH 2/3] drm/exynos: hdmi: Simplify with dev_err_probe() Common pattern of handling deferred probe can be simplified with dev_err_probe(). Less code and also it prints the error value. Signed-off-by: Krzysztof Kozlowski Reviewed-by: Andrzej Hajda Signed-off-by: Inki Dae --- drivers/gpu/drm/exynos/exynos_hdmi.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c index c5ba32fca5f3..dc01c188c0e0 100644 --- a/drivers/gpu/drm/exynos/exynos_hdmi.c +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c @@ -1797,11 +1797,8 @@ static int hdmi_resources_init(struct hdmi_context *hdata) hdata->regul_bulk[i].supply = supply[i]; ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(supply), hdata->regul_bulk); - if (ret) { - if (ret != -EPROBE_DEFER) - DRM_DEV_ERROR(dev, "failed to get regulators\n"); - return ret; - } + if (ret) + return dev_err_probe(dev, ret, "failed to get regulators\n"); hdata->reg_hdmi_en = devm_regulator_get_optional(dev, "hdmi-en"); From ddfd4ab6bb08832e1261d7c8c4ae11e5568485af Mon Sep 17 00:00:00 2001 From: Marek Szyprowski Date: Tue, 7 Jul 2020 13:08:27 +0200 Subject: [PATCH 3/3] drm/exynos: Fix dma_parms allocation Since commit 9495b7e92f71 ("driver core: platform: Initialize dma_parms for platform devices") driver core handles allocation of the dma_parms structure for platform device, so there is no need to manually allocate nor free it. Reported-by: Tomi Valkeinen Signed-off-by: Marek Szyprowski Signed-off-by: Inki Dae --- drivers/gpu/drm/exynos/exynos_drm_dma.c | 27 +------------------------ 1 file changed, 1 insertion(+), 26 deletions(-) diff --git a/drivers/gpu/drm/exynos/exynos_drm_dma.c b/drivers/gpu/drm/exynos/exynos_drm_dma.c index 58b89ec11b0e..5887f7f52f96 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dma.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dma.c @@ -31,23 +31,6 @@ #define EXYNOS_DEV_ADDR_START 0x20000000 #define EXYNOS_DEV_ADDR_SIZE 0x40000000 -static inline int configure_dma_max_seg_size(struct device *dev) -{ - if (!dev->dma_parms) - dev->dma_parms = kzalloc(sizeof(*dev->dma_parms), GFP_KERNEL); - if (!dev->dma_parms) - return -ENOMEM; - - dma_set_max_seg_size(dev, DMA_BIT_MASK(32)); - return 0; -} - -static inline void clear_dma_max_seg_size(struct device *dev) -{ - kfree(dev->dma_parms); - dev->dma_parms = NULL; -} - /* * drm_iommu_attach_device- attach device to iommu mapping * @@ -69,10 +52,7 @@ static int drm_iommu_attach_device(struct drm_device *drm_dev, return -EINVAL; } - ret = configure_dma_max_seg_size(subdrv_dev); - if (ret) - return ret; - + dma_set_max_seg_size(subdrv_dev, DMA_BIT_MASK(32)); if (IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)) { /* * Keep the original DMA mapping of the sub-device and @@ -89,9 +69,6 @@ static int drm_iommu_attach_device(struct drm_device *drm_dev, ret = iommu_attach_device(priv->mapping, subdrv_dev); } - if (ret) - clear_dma_max_seg_size(subdrv_dev); - return ret; } @@ -114,8 +91,6 @@ static void drm_iommu_detach_device(struct drm_device *drm_dev, arm_iommu_attach_device(subdrv_dev, *dma_priv); } else if (IS_ENABLED(CONFIG_IOMMU_DMA)) iommu_detach_device(priv->mapping, subdrv_dev); - - clear_dma_max_seg_size(subdrv_dev); } int exynos_drm_register_dma(struct drm_device *drm, struct device *dev,