Commit 2c5bf028 authored by Christian Gmeiner's avatar Christian Gmeiner Committed by Lucas Stach

drm/etnaviv: fix external abort seen on GC600 rev 0x19

It looks like that this GPU core triggers an abort when
reading VIVS_HI_CHIP_PRODUCT_ID and/or VIVS_HI_CHIP_ECO_ID.

I looked at different versions of Vivante's kernel driver and did
not found anything about this issue or what feature flag can be
used. So go the simplest route and do not read these two registers
on the affected GPU core.
Signed-off-by: default avatarChristian Gmeiner <christian.gmeiner@gmail.com>
Reported-by: default avatarJosua Mayer <josua.mayer@jm0.eu>
Fixes: 815e45bb ("drm/etnaviv: determine product, customer and eco id")
Cc: stable@vger.kernel.org
Tested-by: default avatarJosua Mayer <josua.mayer@jm0.eu>
Signed-off-by: default avatarLucas Stach <l.stach@pengutronix.de>
parent 9123e3a7
......@@ -337,9 +337,16 @@ static void etnaviv_hw_identify(struct etnaviv_gpu *gpu)
gpu->identity.model = gpu_read(gpu, VIVS_HI_CHIP_MODEL);
gpu->identity.revision = gpu_read(gpu, VIVS_HI_CHIP_REV);
gpu->identity.product_id = gpu_read(gpu, VIVS_HI_CHIP_PRODUCT_ID);
gpu->identity.customer_id = gpu_read(gpu, VIVS_HI_CHIP_CUSTOMER_ID);
/*
* Reading these two registers on GC600 rev 0x19 result in a
* unhandled fault: external abort on non-linefetch
*/
if (!etnaviv_is_model_rev(gpu, GC600, 0x19)) {
gpu->identity.product_id = gpu_read(gpu, VIVS_HI_CHIP_PRODUCT_ID);
gpu->identity.eco_id = gpu_read(gpu, VIVS_HI_CHIP_ECO_ID);
}
/*
* !!!! HACK ALERT !!!!
......
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