The DMA masks need to be set correctly before any DMA API activity kicks
off, and the current point in panfrost_probe() is way too late in that
regard. since panfrost_mmu_init() has already set up a live address
space and DMA-mapped MMU pagetables. We can't set masks until we've
queried the appropriate value from MMU_FEATURES, but as soon as
reasonably possible after that should suffice.
Signed-off-by: Robin Murphy <robin.mur...@arm.com>
---
drivers/gpu/drm/panfrost/panfrost_drv.c | 5 -----
drivers/gpu/drm/panfrost/panfrost_gpu.c | 5 +++++
2 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c
b/drivers/gpu/drm/panfrost/panfrost_drv.c
index c06af78ab833..af0058ffc1e4 100644
--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -3,8 +3,6 @@
/* Copyright 2019 Linaro, Ltd., Rob Herring <r...@kernel.org> */
/* Copyright 2019 Collabora ltd. */
-#include <linux/bitfield.h>
-#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/pagemap.h>
@@ -388,9 +386,6 @@ static int panfrost_probe(struct platform_device *pdev)
goto err_out0;
}
- dma_set_mask_and_coherent(pfdev->dev,
- DMA_BIT_MASK(FIELD_GET(0xff00, pfdev->features.mmu_features)));
-
err = panfrost_devfreq_init(pfdev);
if (err) {
dev_err(&pdev->dev, "Fatal error during devfreq init\n");
diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c
b/drivers/gpu/drm/panfrost/panfrost_gpu.c
index aceaf6e44a09..42511fc1fea0 100644
--- a/drivers/gpu/drm/panfrost/panfrost_gpu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_gpu.c
@@ -2,8 +2,10 @@
/* Copyright 2018 Marty E. Plummer <hanet...@startmail.com> */
/* Copyright 2019 Linaro, Ltd., Rob Herring <r...@kernel.org> */
/* Copyright 2019 Collabora ltd. */
+#include <linux/bitfield.h>
#include <linux/bitmap.h>
#include <linux/delay.h>
+#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iopoll.h>
@@ -332,6 +334,9 @@ int panfrost_gpu_init(struct panfrost_device *pfdev)
panfrost_gpu_init_features(pfdev);
+ dma_set_mask_and_coherent(pfdev->dev,
+ DMA_BIT_MASK(FIELD_GET(0xff00, pfdev->features.mmu_features)));
+
irq = platform_get_irq_byname(to_platform_device(pfdev->dev), "gpu");
if (irq <= 0)
return -ENODEV;
--
2.21.0.dirty
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