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drm/etnaviv: ignore VG GPUs with FE2.0 

Ignore GPUs with a 2.0 front end.  These have a different register
layout for the front end, which provokes imprecise aborts from the
register accesses in the 'gpu' debugfs file.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
This commit is contained in:
Russell King 2016-01-21 15:19:59 +00:00 committed by Lucas Stach
parent f6427760a2
commit b98c66887e
1 changed files with 8 additions and 0 deletions
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8
drivers/gpu/drm/etnaviv/etnaviv_gpu.c
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@ -515,6 +515,14 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
goto fail;
}
/* Exclude VG cores with FE2.0 */
if (gpu->identity.features & chipFeatures_PIPE_VG &&
gpu->identity.features & chipFeatures_FE20) {
dev_info(gpu->dev, "Ignoring GPU with VG and FE2.0\n");
ret = -ENXIO;
goto fail;
}
ret = etnaviv_hw_reset(gpu);
if (ret)
goto fail;