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drm/etnaviv: fix workaround for GC500

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The hardware description macros define the mask and shifts the wrong
way around for the intended use, leading to the condition never being
true and the chip revision ending up with the wrong value.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Christian Gmeiner <christian.gmeiner@gmail.com>
This commit is contained in:
Lucas Stach 2016-01-06 14:36:40 +01:00
parent ed94add00e
commit c33246d793
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/etnaviv/etnaviv_gpu.c
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@ -251,9 +251,12 @@ static void etnaviv_hw_identify(struct etnaviv_gpu *gpu)
chipIdentity = gpu_read(gpu, VIVS_HI_CHIP_IDENTITY);
/* Special case for older graphic cores. */
if (VIVS_HI_CHIP_IDENTITY_FAMILY(chipIdentity) == 0x01) {
if (((chipIdentity & VIVS_HI_CHIP_IDENTITY_FAMILY__MASK)
>> VIVS_HI_CHIP_IDENTITY_FAMILY__SHIFT) == 0x01) {
gpu->identity.model = 0x500; /* gc500 */
gpu->identity.revision = VIVS_HI_CHIP_IDENTITY_REVISION(chipIdentity);
gpu->identity.revision =
(chipIdentity & VIVS_HI_CHIP_IDENTITY_REVISION__MASK)
>> VIVS_HI_CHIP_IDENTITY_REVISION__SHIFT;
} else {
gpu->identity.model = gpu_read(gpu, VIVS_HI_CHIP_MODEL);