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drm/arm/komeda: update DMA mask to 40 bits

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Each layer in the DPU has a 40-bit base address register, which indicates
start of frame buffer data for that layer. Komeda driver does not set
its DMA mask, which makes it 32-bit by default which does not use
the entire available possible supported by the DPU.

Update the DMA mask to align with DPU Architecture v1.0 spec.

Signed-off-by: Amjad Ouled-Ameur <amjad.ouled-ameur@arm.com>
Signed-off-by: Faiz Abbas <faiz.abbas@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240219100915.192475-4-faiz.abbas@arm.com
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
This commit is contained in:
Amjad Ouled-Ameur
2024-02-19 15:39:15 +05:30
committed by Liviu Dudau
parent 71b03802fe
commit a918dcfecc
1 changed files with 4 additions and 0 deletions
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drivers/gpu/drm/arm/display/komeda/komeda_drv.c
+4
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@@ -59,6 +59,10 @@ static int komeda_platform_probe(struct platform_device *pdev)
struct komeda_drv *mdrv;
int err;
err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40));
if (err)
return dev_err_probe(dev, err, "DMA mask error\n");
mdrv = devm_kzalloc(dev, sizeof(*mdrv), GFP_KERNEL);
if (!mdrv)
return -ENOMEM;