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gpu: nvgpu: Add L2 register read-backs following writes

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LTC register write is followed by a register read
and if data doesn't match code will report the error.

Renamed existing nvgpu_writel_check function as
nvgpu_writel_loop as it loops until the write get success.

nvgpu_writel_check function write and read back and
compare the data.

Bug 2039150

Change-Id: I0a49be36aad23936f2d58aa82872710827da1d32
Signed-off-by: Vinod G <vinodg@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1762344
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Vinod G
2018-06-26 18:09:57 -07:00
committed by mobile promotions
parent b97bcb3c68
commit ac98827c9d
10 changed files with 70 additions and 37 deletions
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2
drivers/gpu/nvgpu/os/linux/io.c
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@@ -69,7 +69,7 @@ u32 __nvgpu_readl(struct gk20a *g, u32 r)
return v;
}
void nvgpu_writel_check(struct gk20a *g, u32 r, u32 v)
void nvgpu_writel_loop(struct gk20a *g, u32 r, u32 v)
{
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);