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Merge branch 'drm-etnaviv-fixes' of git://git.pengutronix.de:/git/lst/linux into drm-fixes 

just a single fix to not move the GPU linear window on cores where it
might lead to inconsistent views of the memory by different engines in
the core, thus breaking relocs and possibly causing other fun.

* 'drm-etnaviv-fixes' of git://git.pengutronix.de:/git/lst/linux:
  drm/etnaviv: don't move linear memory window on 3D cores without MC2.0
hifive-unleashed-5.1
Dave Airlie 2016-04-27 09:19:06 +10:00
parent 02da2d7217 2144fff7df
commit bd0b560a75
1 changed files with 18 additions and 13 deletions
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31
drivers/gpu/drm/etnaviv/etnaviv_gpu.c
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@ -572,6 +572,24 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
goto fail;
}
/*
* Set the GPU linear window to be at the end of the DMA window, where
* the CMA area is likely to reside. This ensures that we are able to
* map the command buffers while having the linear window overlap as
* much RAM as possible, so we can optimize mappings for other buffers.
*
* For 3D cores only do this if MC2.0 is present, as with MC1.0 it leads
* to different views of the memory on the individual engines.
*/
if (!(gpu->identity.features & chipFeatures_PIPE_3D) ||
(gpu->identity.minor_features0 & chipMinorFeatures0_MC20)) {
u32 dma_mask = (u32)dma_get_required_mask(gpu->dev);
if (dma_mask < PHYS_OFFSET + SZ_2G)
gpu->memory_base = PHYS_OFFSET;
else
gpu->memory_base = dma_mask - SZ_2G + 1;
}
ret = etnaviv_hw_reset(gpu);
if (ret)
goto fail;
@ -1566,7 +1584,6 @@ static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct etnaviv_gpu *gpu;
u32 dma_mask;
int err = 0;
gpu = devm_kzalloc(dev, sizeof(*gpu), GFP_KERNEL);
@ -1576,18 +1593,6 @@ static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
gpu->dev = &pdev->dev;
mutex_init(&gpu->lock);
/*
* Set the GPU linear window to be at the end of the DMA window, where
* the CMA area is likely to reside. This ensures that we are able to
* map the command buffers while having the linear window overlap as
* much RAM as possible, so we can optimize mappings for other buffers.
*/
dma_mask = (u32)dma_get_required_mask(dev);
if (dma_mask < PHYS_OFFSET + SZ_2G)
gpu->memory_base = PHYS_OFFSET;
else
gpu->memory_base = dma_mask - SZ_2G + 1;
/* Map registers: */
gpu->mmio = etnaviv_ioremap(pdev, NULL, dev_name(gpu->dev));
if (IS_ERR(gpu->mmio))