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drm/mediatek: Stop using iommu_present() 

Remove the pointless check. If an IOMMU is providing transparent DMA API
ops for any device(s) we care about, the DT code will have enforced the
appropriate probe ordering already. And if the IOMMU *is* entirely
absent, then attempting to go ahead with CMA and either suceeding or
failing decisively seems more useful than deferring forever.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: fd1b62aa00.1700746094.git.robin.murphy@arm.com/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
pull/477/merge
Robin Murphy 2023-11-23 13:41:12 +00:00 committed by Chun-Kuang Hu
parent 3e743b0fcb
commit c5a761e2fe
1 changed files with 0 additions and 4 deletions
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4
drivers/gpu/drm/mediatek/mtk_drm_drv.c
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@ -5,7 +5,6 @@
*/
#include <linux/component.h>
#include <linux/iommu.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
@ -608,9 +607,6 @@ static int mtk_drm_bind(struct device *dev)
struct drm_device *drm;
int ret, i;
if (!iommu_present(&platform_bus_type))
return -EPROBE_DEFER;
pdev = of_find_device_by_node(private->mutex_node);
if (!pdev) {
dev_err(dev, "Waiting for disp-mutex device %pOF\n",