drm/komeda: fixing of DMA mapping sg segment warning (a260e0b8) · Commits · 戴 / test

Fixing the DMA mapping sg segment warning, which shows "DMA-API: mapping sg segment longer than device claims to support [len=921600] [max=65536]". Fixed by setting the max segment size at Komeda driver. This patch depends on: - https://patchwork.freedesktop.org/series/54448/ - https://patchwork.freedesktop.org/series/54449/ - https://patchwork.freedesktop.org/series/54450/ - https://patchwork.freedesktop.org/series/58976/ Changes since v1: - Adds member description - Adds patch denpendency in the comment Signed-off-by:

drivers/gpu/drm/arm/display/komeda/komeda_dev.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -8,6 +8,7 @@
		#include <linux/of_device.h>
		#include <linux/of_graph.h>
		#include <linux/platform_device.h>
		#include <linux/dma-mapping.h>
		#ifdef CONFIG_DEBUG_FS
		#include <linux/debugfs.h>
		#include <linux/seq_file.h>
		@@ -249,6 +250,9 @@ struct komeda_dev komeda_dev_create(struct device dev)
		goto err_cleanup;
		}

		dev->dma_parms = &mdev->dma_parms;
		dma_set_max_seg_size(dev, DMA_BIT_MASK(32));

		err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group);
		if (err) {
		DRM_ERROR("create sysfs group failed.\n");

+2 −0

Original line number	Diff line number	Diff line
		@@ -149,6 +149,8 @@ struct komeda_dev {
		struct device *dev;
		/** @reg_base: the base address of komeda io space */
		u32 __iomem *reg_base;
		/** @dma_parms: the dma parameters of komeda */
		struct device_dma_parameters dma_parms;

		/** @chip: the basic chip information */
		struct komeda_chip_info chip;